Sound production unit

Abstract

The invention discloses a sound production 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 present invention relates to the technical field of electroacoustic converters, and in particular to a sound generating unit. Background Art

[0002] As a common electroacoustic transducer device that converts electrical energy into sound energy, the sound unit plays an indispensable role in the sound amplification system.

[0003] With the rapid development of consumer electronic products such as mobile phones and tablet computers, consumer electronic products have put forward higher requirements on the sound units they carry in terms of performance and size. The dual voice coil structure is a way to improve the performance of the sound unit, but the sound unit of the traditional dual voice coil structure is thick and cannot adapt well to the development trend of thin and light consumer electronic products. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a light and thin high-performance sound-emitting unit.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sound generating unit, comprising: basin stand; A magnetic circuit component, the magnetic circuit component is connected to the basin frame, the magnetic circuit component includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke, the central magnetic structure includes a lower central magnetic steel, a central washer, an upper central magnetic steel and an upper magnetic conductive cover which are sequentially connected from bottom to top, the upper magnetic conductive cover includes a body and a surrounding wall arranged along the edge of the body, a first gap is formed between the surrounding wall and the upper central magnetic steel; a plurality of bosses are arranged on the yoke, a plurality of the bosses are arranged around the lower central magnetic steel and form a second gap with the lower central magnetic steel, the first gap is connected to the second gap to form an inner magnetic gap; the side magnetic structure is arranged on the outer side of the boss and forms an outer magnetic gap between the boss; An inner voice coil, the inner voice coil being liftable and disposed in the inner magnetic gap; An outer voice coil, the outer voice coil can be raised and lowered in the outer magnetic gap; A diaphragm assembly, wherein the diaphragm assembly is connected to the basin frame, the upper magnetic conductive cover and the outer voice coil; A centering support plate is connected to the inner voice coil, the outer voice coil and the basin frame.

[0006] The beneficial effects of the present invention are as follows: the sound unit has a simple structure, and the dual voice coil structure allows the sound unit to have a stronger driving force, so that the sound unit has a better performance; the reverse design of the magnetic poles of the upper center magnetic steel and the lower center magnetic steel makes the center magnetic structure have a stronger magnetic field, and the design of the upper magnetic conductive cover can improve the magnetic force utilization rate, so that the thickness of the center magnetic structure can be designed to be smaller; the cooperation between the boss and the surrounding wall of the upper magnetic conductive cover greatly improves the magnetic conductivity effect of the magnetic circuit assembly, which is conducive to further improving the magnetic force utilization rate; moreover, the vibration space of the inner voice coil is large, so that the inner voice coil can achieve a larger amplitude within a limited height space, so that the sound unit can achieve a large amplitude and ultra-thinness. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a cross-sectional view of a sound-emitting unit according to a first embodiment of the present invention; Figure 2 An exploded view of the sound unit of the first embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the sound generating unit according to the first embodiment of the present invention.

[0008] Description of labels: 1. Basin stand; 21. Inner voice coil; 22. Outer voice coil; 3. diaphragm assembly; 31. sound membrane; 32. dome; 321. ring frame; 322. claw; 4. Centering support; 41. Inner mounting portion; 411. Solder pad; 42. Cantilever portion; 43. Outer mounting portion; 5. Magnetic circuit assembly; 51. Yoke; 511. Boss; 512. Avoidance structure; 52. Center magnetic structure; 521. Lower center magnet; 522. Center washer; 523. Upper center magnet; 524. Upper magnetic shield; 5241. Main body; 5242. Surrounding wall; 5243. Avoidance gap; 53. Side magnetic structure. DETAILED DESCRIPTION

[0009] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0010] Please refer to Figures 1 to 3 , sound unit, including: Basin stand 1; A magnetic circuit component 5, wherein the magnetic circuit component 5 is connected to the basin frame 1, and the magnetic circuit component 5 comprises a yoke 51 and a central magnetic structure 52 and a side magnetic structure 53 respectively arranged on the yoke 51, wherein the central magnetic structure 52 comprises a lower central magnetic steel 521, a central washer 522, an upper central magnetic steel 523 and an upper magnetic conductive cover 524 which are sequentially connected from bottom to top, wherein the upper magnetic conductive cover 524 comprises a body 5241 and a surrounding wall 5242 arranged along the edge of the body 5241, wherein a first gap is formed between the surrounding wall 5242 and the upper central magnetic steel 523; a plurality of bosses 511 are arranged on the yoke 51, wherein a plurality of the bosses 511 are arranged around the lower central magnetic steel 521 and form a second gap with the lower central magnetic steel 521, wherein the first gap is connected with the second gap to form an inner magnetic gap; and 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; An inner voice coil 21, the inner voice coil 21 can be raised and lowered in the inner magnetic gap; An outer voice coil 22, the outer voice coil 22 can be raised and lowered in the outer magnetic gap; A diaphragm assembly 3, wherein the diaphragm assembly 3 is connected to the basin frame 1, the upper magnetic conductive cover 524 and the outer voice coil 22; The centering support plate 4 is connected to the inner voice coil 21 , the outer voice coil 22 and the basin frame 1 .

[0011] From the above description, it can be seen that the beneficial effects of the present invention are: the sound unit has a simple structure, and the dual voice coil architecture allows the sound unit to have a stronger driving force, so that the sound unit has a better performance; the upper center magnetic steel 523 and the lower center magnetic steel 521 have reverse pole design so that the center magnetic structure 52 has a stronger magnetic field, and the design of the upper magnetic conductive cover 524 can improve the magnetic force utilization rate, so that the thickness of the center magnetic structure 52 can be designed to be smaller; the cooperation between the boss 511 and the surrounding wall 5242 of the upper magnetic conductive cover 524 greatly improves the magnetic conductivity of the magnetic circuit assembly 5, which is conducive to further improving the magnetic force utilization rate; moreover, the vibration space of the inner voice coil 21 is large, so that the inner voice coil 21 can achieve a larger amplitude within a limited height space, so that the sound unit can achieve a large amplitude and ultra-thinness.

[0012] Furthermore, the bottom end of the surrounding wall 5242 has an avoidance notch 5243 for avoiding the centering support piece 4.

[0013] It can be seen from the above description that the existence of the avoidance gap 5243 can prevent the centering support plate 4 from colliding with the surrounding wall 5242, while ensuring the magnetic conductivity of the upper magnetic cover 524 as much as possible, allowing the sound unit to vibrate with a larger amplitude.

[0014] Furthermore, an avoidance groove is formed between two adjacent bosses 511 , and the avoidance groove is arranged corresponding to the avoidance notch 5243 .

[0015] It can be seen from the above description that the existence of the avoidance groove can prevent the centering support piece 4 from colliding with the boss 511 .

[0016] Furthermore, the boss 511 is a stamping structure formed by stamping.

[0017] It can be seen from the above description that the boss 511 is formed in a simple manner and is easy to manufacture.

[0018] Furthermore, the diaphragm assembly 3 includes a sound membrane 31, and the sound membrane 31 includes an inner annular portion, an inner folding ring portion, a connecting portion, an outer folding ring portion and an outer annular portion which are sequentially connected from the inside to the outside, the outer annular portion is connected to the basin frame 1, the connecting portion is connected to the outer voice coil 22, and the inner annular portion is connected to the upper magnetic conductive cover 524.

[0019] Furthermore, the diaphragm assembly 3 also includes a dome 32, the dome 32 includes a connected ring frame portion 321 and a claw portion 322, the ring frame portion 321 is connected to the connecting portion, the outer voice coil 22 is indirectly connected to the connecting portion through the ring frame portion 321, the centering support plate 4 includes an inner mounting portion 41, a cantilever portion 42 and an outer mounting portion 43 connected in sequence, the outer mounting portion 43 is connected to the basin frame 1, and the inner mounting portion 41 is respectively connected to the inner voice coil 21, the outer voice coil 22 and the claw portion 322.

[0020] From the above description, it can be seen that the setting of the ball top 32 can ensure the rigidity of the diaphragm assembly 3. The cooperation between the ball top 32 and the inner mounting part 41 can effectively fix the outer voice coil 22, thereby making the structure of the sound 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 fixing part, reduce the risk of breakage of the inner mounting part 41, and ensure the synchronization of the amplitudes of the inner voice coil 21 and the outer voice coil 22.

[0021] Furthermore, the inner mounting portion 41 is disposed corresponding to a corner of the outer voice coil 22 , a middle of a short axis side, or a middle of a long axis side.

[0022] It can be seen from the above description that the position of the centering support piece 4 in the sound unit can be selected and set according to actual needs.

[0023] Furthermore, a single inner mounting portion 41 is connected to two claws 322 , a gap is formed between the two claws 322 connecting the same inner mounting portion 41 , and a solder pad 411 is provided on the inner mounting portion 41 corresponding to the gap.

[0024] It can be seen from the above description that the space on the top surface of the inner installation portion 41 can be fully utilized.

[0025] Furthermore, the yoke 51 has an avoidance structure 512 for avoiding the centering support piece 4 .

[0026] Furthermore, the avoidance structure 512 is a blind groove or a through groove.

[0027] It can be seen from the above description that the avoidance structure 512 can prevent the centering support piece 4 from colliding with the yoke 51 .

[0028] Please refer to Figures 1 to 3 , Embodiment 1 of the present invention is: a sound unit, including a basin frame 1, an inner voice coil 21, an outer voice coil 22, a diaphragm assembly 3, a centering support plate 4 and a magnetic circuit assembly 5, wherein the magnetic circuit assembly 5 is connected to the basin frame 1, and the magnetic circuit assembly 5 includes a yoke 51 and a central magnetic structure 52 and a side magnetic structure 53 respectively arranged on the yoke 51, and the central magnetic structure 52 includes a lower central magnetic steel 521, a central washer 522, an upper central magnetic steel 523 and an upper magnetic conductive cover 524 which are sequentially connected from bottom to top, and the bottom of the lower central magnetic steel 521 is connected to the yoke 51, and the upper magnetic conductive cover 524 includes a body 5241 and a surrounding wall 5242 arranged along the edge of the body 5241, and the body 5241 and the surrounding wall 5242 are an integrated structure formed by integral processing, and a first gap is formed between the surrounding wall 5242 and the upper central magnetic steel 523 Gap; The yoke 51 is provided with a plurality of bosses 511, and the plurality of bosses 511 are arranged around the lower center magnet 521 and form a second gap with the lower center magnet 521, the first gap is connected with the second gap to form an inner magnetic gap, and the inner voice coil 21 can be raised and lowered 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, and the outer voice coil 22 can be raised and lowered in the outer magnetic gap, and the side magnetic structure 53 and / or the yoke 51 are connected to the basin 1; the diaphragm assembly 3 is connected to the basin 1, the upper magnetic conductive cover 524 and the outer voice coil 22, and the centering support plate 4 is connected to the inner voice coil 21, the outer voice coil 22 and the basin 1, and when the sound unit is working, the inner voice coil 21 and the outer voice coil 22 vibrate in the same direction and with the same amplitude.

[0029] Optionally, the bottom end of the surrounding wall 5242 has an avoidance notch 5243 for avoiding the centering support plate 4. In detail, an avoidance groove is formed between two adjacent bosses 511, and the avoidance groove is arranged corresponding to the avoidance notch 5243.

[0030] In this embodiment, the boss 511 is a stamping structure formed by stamping. That is to say, the cross-section of the boss 511 is in a C-shape rotated 90° clockwise. In other embodiments, the boss 511 may also be a solid structure integrally formed with the yoke 51, or the boss 511 may also be an independent structural member independent of the yoke 51 and fixedly connected to the yoke 51, and the independent structural member is made of ferromagnetic material.

[0031] The diaphragm assembly 3 includes a voice coil membrane 31. The voice coil membrane 31 includes an inner annular portion, an inner folding ring portion, a connecting portion, an outer folding ring portion, and an outer annular portion connected in sequence from the inside out. The outer annular portion is connected to the chassis 1, the connecting portion is connected to the outer voice coil 22, and the inner annular portion is connected to the upper magnetic shield 524. To ensure the thinness and lightness of the sound generating unit, the inner annular portion is connected to the outer wall surface of the surrounding wall 5242.

[0032] The diaphragm assembly 3 further includes a dome 32. The dome 32 includes a ring frame portion 321 and a claw portion 322 connected to each other. The ring frame portion 321 is connected to the connecting portion, and the outer voice coil 22 is indirectly connected to the connecting portion through the ring frame portion 321. The centering washer 4 includes an inner mounting portion 41, a cantilever portion 42, and an outer mounting portion 43 connected in sequence. The outer mounting portion 43 is connected to the chassis 1, and the inner mounting portion 41 is connected to the inner voice coil 21, the outer voice coil 22, and the claw portion 322 respectively. Preferably, the ring frame portion 321 and the claw portion 322 are an integral structure integrally formed.

[0033] Since the sound generating unit of this embodiment energizes the inner voice coil 21 and the outer voice coil 22 through the centering washer 4, in this embodiment, two claw portions 322 are connected to a single inner mounting portion 41, and a gap is formed between the two claw portions 322 connected to the same inner mounting portion 41. A solder pad 411 is provided at the inner mounting portion 41 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. An electrically conductive portion electrically conductive with the solder pad 411 is provided on the outer mounting portion 43, and the sound generating unit is electrically connected to an external power source through the electrically conductive portion.

[0034] In this embodiment, the inner mounting portion 41 is arranged corresponding to the corner of the outer voice coil 22. In other embodiments, it is also possible that the inner mounting portion 41 is arranged corresponding to the middle of the short axis side or the long axis side of the outer voice coil 22.

[0035] Optionally, the yoke 51 has an avoidance structure 512 for avoiding the centering washer 4, and the avoidance structure 512 is a blind groove or a through groove.

[0036] In summary, the sound unit provided by the present invention has a novel structure, a large magnetic field strength, good performance, and can be made thin and light, and is particularly suitable for use in thin and light electronic devices.

[0037] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sound generating unit, characterized in that: include basin stand; A magnetic circuit component, the magnetic circuit component is connected to the basin frame, the magnetic circuit component includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke, the central magnetic structure includes a lower central magnetic steel, a central washer, an upper central magnetic steel and an upper magnetic conductive cover which are sequentially connected from bottom to top, the upper magnetic conductive cover includes a body and a surrounding wall arranged along the edge of the body, a first gap is formed between the surrounding wall and the upper central magnetic steel; a plurality of bosses are arranged on the yoke, a plurality of the bosses are arranged around the lower central magnetic steel and form a second gap with the lower central magnetic steel, the first gap is connected to the second gap to form an inner magnetic gap; the side magnetic structure is arranged on the outer side of the boss and forms an outer magnetic gap between the boss; An inner voice coil, the inner voice coil being liftable and disposed in the inner magnetic gap; An outer voice coil, the outer voice coil can be raised and lowered in the outer magnetic gap; A diaphragm assembly, wherein the diaphragm assembly is connected to the basin frame, the upper magnetic conductive cover and the outer voice coil; A centering support plate is connected to the inner voice coil, the outer voice coil and the basin frame.

2. The sound generating unit according to claim 1, characterized in that: The bottom end of the surrounding wall is provided with an escape notch for escaping the centering support piece.

3. The sound generating unit according to claim 2, characterized in that: An avoidance groove is formed between two adjacent bosses, and the avoidance groove is arranged corresponding to the avoidance notch.

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

5. The sound generating unit according to claim 1, characterized in that: The diaphragm assembly includes a sound diaphragm, and the sound diaphragm includes an inner annular portion, an inner folding ring portion, a connecting portion, an outer folding ring portion and an outer annular portion which are connected in sequence from the inside to the outside. The outer annular portion is connected to the basin frame, the connecting portion is connected to the outer voice coil, and the inner annular portion is connected to the upper magnetic conductive cover.

6. The sound generating unit according to claim 5, characterized in that: The diaphragm assembly also includes a dome, and the dome includes a ring frame portion and a claw portion connected to each other. 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 plate includes an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence, the outer mounting portion is connected to the basin frame, and the inner mounting portion is respectively connected to the inner voice coil, the outer voice coil and the claw portion.

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

8. The sound generating unit according to claim 6, characterized in that: A single inner mounting portion is connected to two claws, a gap is formed between the two claws connecting the same inner mounting portion, and a pad is provided on the inner mounting portion corresponding to the gap.

9. The sound generating unit according to claim 1, characterized in that: The yoke has an avoidance structure for avoiding the centering support piece.

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

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