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 disk, and is characterized in that the magnetic circuit assembly is connected with the basin stand and comprises a yoke, and a central magnetic structure and an edge magnetic structure which are respectively arranged on the yoke; the central magnetic structure comprises lower central magnetic steel, a central washer, upper central 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, and a first gap is formed between the surrounding wall and the upper central magnetic structure; the yoke is provided with a plurality of bosses, the plurality of bosses are arranged around the lower center magnetic steel, a second gap is formed between the bosses and the lower center magnetic steel, and the first gap and the second gap are communicated to form an inner side magnetic gap; the edge magnetic structure is arranged on the outer side of the boss, and an outer side magnetic gap is formed between the edge magnetic structure and the boss; the vibrating diaphragm assembly is connected with the basin frame, the upper magnetic conductive cover and the outer voice coil; the centering disk is connected with the inner voice coil, the outer voice coil and the frame. 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 the sounding unit carried by it puts forward higher requirement. Double voice coil architecture is a kind of method 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 light and thin. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems that provide 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 set on the yoke center magnetic structure and side magnetic structure, the center magnetic structure includes sequentially connected from bottom to top lower center magnetic steel, center hua si, upper center magnetic steel and upper magnetic shield, the upper magnetic shield includes body and the surrounding wall along the edge of the body is arranged, and the first gap is formed between the surrounding wall and the upper center magnetic steel;Multiple bosses are provided on the yoke, and the multiple bosses are arranged around the lower center magnetic steel and form a second gap between the lower center magnetic steel, and the first gap and the second gap are communicated to form an inner magnetic gap;The side magnetic structure is arranged outside the boss and forms an outer magnetic gap between the boss;

[0008] Inner voice coil, the inner voice coil is arranged in the inner magnetic gap;

[0009] Outer voice coil, the outer voice coil is arranged in the outer magnetic gap;

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

[0011] Centering sheet, the centering sheet is connected the inner voice coil, outer voice coil and frame.

[0012] Further, the bottom end of the surrounding wall has a clearance gap for avoiding the centering sheet.

[0013] Further, an avoiding slot is formed between two adjacent bosses, and the avoiding slot corresponds to the avoiding notch.

[0014] Further, the boss is a stamping structure.

[0015] Further, the diaphragm assembly comprises a sound film, the sound film 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.

[0016] Further, the 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, the centering support sheet 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, and the inner mounting part is connected with the inner voice coil, the outer voice coil and the claw part respectively.

[0017] Further, the inner mounting part is arranged at a position corresponding to an angle part, a middle part of a minor axis or a middle part of a major axis of the outer voice coil.

[0018] Further, two claw parts are connected with a single inner mounting part, a gap is formed between the two claw parts connected with the same inner mounting part, and a solder pad is arranged at a position corresponding to the gap in the inner mounting part.

[0019] Further, the yoke has an avoiding structure for avoiding the centering support sheet.

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

[0021] The sound generating unit has the advantages that: the sound generating unit has a simple structure, the double voice coil structure enables the sound generating unit to have stronger driving force and 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 cooperation of the boss and the surrounding wall of the upper magnetic shield greatly improves the magnetic conductive effect of the magnetic circuit assembly, and the utilization rate of magnetic force is further improved; and the vibration space of the inner voice coil is large, so that the inner voice coil can have larger amplitude in the limited height space, and the sound generating unit can realize large amplitude and thin thickness. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a sectional view of the sound generating unit of the utility model embodiment one;

[0023] Fig. 2The explosion map of the sound production unit of the embodiment one of the utility model;

[0024] Fig. 3 The structure schematic view of the sound production unit of the embodiment one of the utility model.

[0025] Label explanation:

[0026] 1, the basin frame;

[0027] 21, inner voice coil, 22, outer voice coil;

[0028] 3, the diaphragm assembly, 31, the sound film, 32, the ball top, 321, the ring frame part, 322, the claw part;

[0029] 4, the center support sheet, 41, the inner mounting part, 411, the solder pad, 42, the cantilever part, 43, the outer mounting part;

[0030] 5, the magnetic circuit assembly, 51, the yoke, 511, the boss, 512, the avoidance structure, 52, the center magnetic structure, 521, the lower center magnetic steel, 522, the center magnetic steel, 523, the upper center magnetic steel, 524, the upper magnetic shield, 5241, the body, 5242, the surrounding wall, 5243, the avoidance gap, 53, the edge magnetic structure. Specific implementation

[0031] In order to explain the technical content, the purpose and the effect of the utility model in detail, the following will be explained by combining with the embodiment and the accompanying drawings.

[0032] Please refer to Figs. 1-3 , the sound production unit, comprising:

[0033] The basin frame 1;

[0034] The magnetic circuit assembly 5 is connected with the basin frame 1, and the magnetic circuit assembly 5 includes the yoke 51, the center magnetic structure 52 and the edge magnetic structure 53 arranged on the yoke 51 respectively, the center magnetic structure 52 includes the lower center magnetic steel 521, the center magnetic steel 522, the upper center magnetic steel 523 and the upper magnetic shield 524 connected in sequence from bottom to top, the upper magnetic shield 524 includes the body 5241 and the surrounding wall 5242 arranged along the edge of the body 5241, and the first gap is formed between the surrounding wall 5242 and the upper center magnetic steel 523; a plurality of bosses 511 are arranged on the yoke 51, and the plurality of bosses 511 are arranged around the lower center magnetic steel 521 and form the second gap between the lower center magnetic steel 521, and the first gap and the second gap are communicated to form the inner magnetic gap; the edge magnetic structure 53 is arranged outside the boss 511 and forms the outer magnetic gap between the boss 511;

[0035] The inner voice coil 21 can be arranged in the inner magnetic gap.

[0036] An outer voice coil 22 is arranged in the outer magnetic gap in a lifting manner;

[0037] A diaphragm assembly 3 is connected to the yoke 1, the upper magnetic shield 524 and the outer voice coil 22.

[0038] A centering sheet 4 is connected to the inner voice coil 21, the outer voice coil 22 and the yoke 1.

[0039] As can be seen from the above description, the sound generating unit has the advantages that: the sound generating unit has a simple structure, the double voice coil structure enables the sound generating unit to have stronger driving force and better performance; the upper center magnetic steel 523 and the lower center magnetic steel 521 are designed to have opposite magnetic poles, so that the center magnetic structure 52 has stronger magnetic field, the upper magnetic shield 524 can improve the magnetic force utilization rate, and the thickness of the center magnetic structure 52 can be designed to be smaller; the cooperation of the boss 511 and the surrounding wall 5242 of the upper magnetic shield 524 greatly improves the magnetic conductive effect of the magnetic circuit assembly 5, which is beneficial to further improving the magnetic force utilization rate; and the vibration space of the inner voice coil 21 is large, so that the inner voice coil 21 can achieve greater amplitude in the limited height space, and the sound generating unit can realize large amplitude and ultra-thin.

[0040] Further, the bottom end of the surrounding wall 5242 has an avoiding gap 5243 for avoiding the centering sheet 4.

[0041] As can be seen from the above description, the avoiding gap 5243 can prevent the centering sheet 4 from colliding with the surrounding wall 5242, while ensuring the magnetic conductive ability of the upper magnetic shield 524 as much as possible, so that the sound generating unit can vibrate with greater amplitude.

[0042] Further, an avoiding groove is formed between two adjacent bosses 511, and the avoiding groove is arranged corresponding to the avoiding gap 5243.

[0043] As can be seen from the above description, the avoiding groove can prevent the centering sheet 4 from colliding with the boss 511.

[0044] Further, the boss 511 is a stamping structure formed by stamping.

[0045] As can be seen from the above description, the boss 511 is formed in a simple manner and is easy to process and manufacture.

[0046] Further, the diaphragm assembly 3 includes a sound film 31, the sound film 31 includes 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 22, and the inner annular part is connected to the upper magnetic shield 524.

[0047] Further, the vibrating diaphragm assembly 3 further comprises a ball top 32, the ball top 32 comprising a ring frame part 321 and a claw part 322 connected with each other, the ring frame part 321 connecting the connecting part, the outer voice coil 22 indirectly connecting the connecting part through the ring frame part 321, the centering support sheet 4 comprising an inner mounting part 41, a cantilever part 42 and an outer mounting part 43 connected with each other in sequence, the outer mounting part 43 connecting the yoke 1, the inner mounting part 41 connecting the inner voice coil 21, the outer voice coil 22 and the claw part 322 respectively.

[0048] As can be seen from the above description, the setting of the ball top 32 can ensure the rigidity of the vibrating diaphragm assembly 3, the cooperation of the ball top 32 and the inner mounting part 41 can effectively fix the outer voice coil 22, so as to make the structure of the sound generating unit more stable, at the same time, the claw part 322 can provide support for the inner mounting part 41, improve the rigidity of the inner mounting part, reduce the risk of fracture of the inner mounting part 41, and ensure the synchronization degree of the amplitude of the inner voice coil 21 and the outer voice coil 22.

[0049] Further, the inner mounting part 41 is arranged corresponding to the corner of the outer voice coil 22, the middle of the short axis side or the middle of the long axis side.

[0050] As can be seen from the above description, the position of the centering support sheet 4 in the sound generating unit can be selected and arranged according to actual needs.

[0051] Further, two claw parts 322 are connected with the single inner mounting part 41, a gap is formed between the two claw parts 322 connected with the same inner mounting part 41, and the inner mounting part 41 is provided with a solder pad 411 corresponding to the gap.

[0052] As can be seen from the above description, the space on the top surface of the inner mounting part 41 can be fully utilized.

[0053] Further, the yoke 51 has an avoiding structure 512 for avoiding the centering support sheet 4.

[0054] Further, the avoiding structure 512 is a blind groove or a through groove.

[0055] As can be seen from the above description, the setting of the avoiding structure 512 can prevent the centering support sheet 4 from colliding with the yoke 51.

[0056] Please refer to Figs. 1-3The utility model discloses an embodiment one for: sounding unit, including basin frame 1, inner voice coil 21, outer voice coil 22, diaphragm assembly 3, centering support piece 4 and magnetic circuit assembly 5, the magnetic circuit assembly 5 is connected the basin frame 1, the magnetic circuit assembly 5 includes yoke 51 and respectively set on the center magnetic structure 52 and the side magnetic structure 53 of yoke 51, the center magnetic structure 52 includes by lower to upper sequentially connected lower center magnetic steel 521, center hu si 522, upper center magnetic steel 523 and upper magnetic flux shield 524, the bottom of lower center magnetic steel 521 is connected yoke 51, the upper magnetic flux shield 524 includes body 5241 and the surrounding wall 5242 of setting along the rim of body 5241, the body 5241 with the surrounding wall 5242 are integrally formed one-piece structure of integrally processing, and the first gap is formed between the surrounding wall 5242 and the upper center magnetic steel 523, a plurality of bosses 511 are provided on the yoke 51, a plurality of the bosses 511 are arranged around the lower center magnetic steel 521 and form a second gap between the lower center magnetic steel 521, the first gap and the second gap communicate to form an inner magnetic gap, the inner voice coil 21 can be lifted and arranged in the inner magnetic gap, the side magnetic structure 53 is arranged on the outer side of the boss 511 and forms an outer magnetic gap between the boss 511, the outer voice coil 22 can be lifted and arranged in the outer magnetic gap, the side magnetic structure 53 and / or the yoke 51 is connected with the basin frame 1, the diaphragm assembly 3 is connected with the basin frame 1, the upper magnetic flux shield 524 and the outer voice coil 22, the centering support piece 4 is connected with the inner voice coil 21, the outer voice coil 22 and the basin frame 1, when the sounding unit works, the inner voice coil 21 and the outer voice coil 22 vibrate in the same direction and amplitude.

[0057] Optionally, the bottom end of the surrounding wall 5242 has an avoiding gap 5243 for avoiding the centering support piece 4, in detail, an avoiding slot is formed between two adjacent bosses 511, and the avoiding slot is arranged corresponding to the avoiding gap 5243.

[0058] In the embodiment, the boss 511 is a stamping structure formed by stamping, that is, the cross section of the boss 511 is a character-shaped structure rotated 90° clockwise. In other embodiments, the boss 511 can also be a solid structure integrally formed with the yoke 51, or the boss 511 can also be an independent structure independent of the yoke 51 and fixedly connected with the yoke 51, and the independent structure is made of ferromagnetic material.

[0059] The vibrating diaphragm assembly 3 comprises a sound diaphragm 31, the sound diaphragm 31 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 1, the connecting part is connected with the outer voice coil 22, the inner annular part is connected with the upper magnetic shield 524, in order to ensure the thinness of the sound generating unit, the inner annular part is connected with the outer wall surface of the surrounding wall 5242.

[0060] The vibrating diaphragm assembly 3 further comprises a ball top 32, the ball top 32 comprises a ring frame part 321 and a claw part 322 connected, the ring frame part 321 is connected with the connecting part, the outer voice coil 22 is indirectly connected with the connecting part through the ring frame part 321, the centering support sheet 4 comprises an inner mounting part 41, a cantilever part 42 and an outer mounting part 43 connected in sequence, the outer mounting part 43 is connected with the yoke 1, the inner mounting part 41 is respectively connected with the inner voice coil 21, the outer voice coil 22 and the claw part 322. Preferably, the ring frame part 321 and the claw part 322 are integrally formed in an integrated structure.

[0061] Since the sound generating unit of the embodiment is energized by the centering support sheet 4 for the inner voice coil 21 and the outer voice coil 22, in the embodiment, two claw parts 322 are connected with a single inner mounting part 41, a gap is formed between the two claw parts 322 connected with the same inner mounting part 41, the inner mounting part 41 is provided with a solder pad 411 corresponding to the gap, the solder pad 411 is used for electrically connecting the inner voice coil 21 and / or the outer voice coil 22, the outer mounting part 43 is provided with an electrically conductive part in conductive connection with the solder pad 411, and the sound generating unit is in conductive connection with an external power supply through the electrically conductive part.

[0062] In the embodiment, the inner mounting part 41 is arranged corresponding to the corner of the outer voice coil 22, and in other embodiments, the inner mounting part 41 can be arranged corresponding to the middle of the minor axis side or the middle of the major axis side of the outer voice coil 22.

[0063] Optionally, the yoke 51 has a avoiding structure 512 for avoiding the centering support sheet 4, the avoiding structure 512 is a blind groove or a through groove.

[0064] In summary, the sound generating unit provided by the utility model has novel structure, large magnetic field strength, good performance, and can realize thinness, and is particularly suitable for thin electronic equipment.

[0065] The above description is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in related technical fields based on the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A sound-generating unit, characterized in that, include Sink stand; A magnetic circuit assembly is connected to the basin frame. The magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The central magnetic structure includes a lower central magnet, a central washer, an upper central magnet, and an upper magnetic guide shield connected sequentially from bottom to top. The upper magnetic guide shield includes a body and a surrounding wall disposed along the edge of the body, forming a first gap between the surrounding wall and the upper central magnet. The yoke is provided with a plurality of protrusions, which surround the lower central magnet and form a second gap with the lower central magnet. The first gap and the second gap are connected to form an inner magnetic gap. The side magnetic structure is disposed on the outside of the protrusions and forms an outer magnetic gap with the protrusions. An inner voice coil, wherein the inner voice coil is movable within the inner magnetic gap; An outer voice coil, which can be raised and lowered within the outer magnetic gap; A diaphragm assembly, wherein the diaphragm assembly is connected to the frame, the upper magnetic cover and the outer voice coil; A centering support is provided, which connects the inner voice coil, the outer voice coil, and the frame.

2. The sound-generating unit according to claim 1, characterized in that, The bottom end of the enclosure has a clearance notch for avoiding the centering support plate.

3. The sound-generating unit according to claim 2, characterized in that, A clearance groove is formed between two adjacent bosses, and the clearance groove is provided corresponding to the clearance notch.

4. The sound-generating unit according to claim 1, characterized in that, The boss is a stamped structure formed by stamping.

5. The sound-generating unit according to claim 1, characterized in that, The diaphragm assembly includes a diaphragm, which comprises an inner annular portion, an inner folded ring portion, a connecting portion, an outer folded ring portion, and an outer annular portion connected sequentially from the inside to the outside. The outer annular portion is connected to the frame, the connecting portion is connected to the outer voice coil, and the inner annular portion is connected to the upper magnetic cover.

6. The sound-generating unit according to claim 5, characterized in that, The diaphragm assembly further includes a dome, which includes a connected ring frame portion and a claw portion. The ring frame portion is connected to the connecting portion, and the outer voice coil is indirectly connected to the connecting portion through the ring frame portion. The centering support includes an inner mounting portion, a cantilever portion, and an outer mounting portion connected in sequence. The outer mounting portion is connected to the frame, and the inner mounting portion is connected to the inner voice coil, the outer voice coil, and the claw portion, respectively.

7. The sound-generating unit according to claim 6, characterized in that, The inner mounting portion is provided at the corner, the middle of the short axis side, or the middle of the long axis side of the outer voice coil.

8. The sound-generating unit according to claim 6, characterized in that, Each inner mounting portion is connected to two claw portions, and a gap is formed between the two claw portions connected to the same inner mounting portion. The inner mounting portion is provided with a solder pad corresponding to the gap.

9. The sound-generating unit according to claim 1, characterized in that, The yoke has a clearance structure for avoiding the centering support plate.

10. The sound-generating unit according to claim 9, characterized in that, The avoidance structure is a blind slot or a through slot.

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