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 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 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, a concave 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, an inner magnetic gap is formed between the surrounding wall and the central magnetic structure; the number of the concave magnetic structures is two, the two concave magnetic structures are symmetrically arranged on both sides of the surrounding wall, a through-opening is formed between the two concave magnetic structures, and an avoidance gap connected to the through-opening is provided at the bottom end of the surrounding wall; the side magnetic structure is located on the outer side of the concave magnetic structure and forms an outer magnetic gap with the concave magnetic structure; 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, wherein the centering support plate includes an inner mounting portion, a cantilever portion and an outer mounting portion which are connected in sequence, wherein the outer mounting portion is connected to the basin frame, the outer mounting portion is connected to the basin frame, one end of the inner mounting portion is connected to the outer voice coil, and the other end of the inner mounting portion passes through the passage and the avoidance gap to connect to the inner voice coil.

[0006] The beneficial effects of the present invention are as follows: the dual voice coil structure in the sound unit enables the sound unit to have a stronger driving force and better performance; the reverse design of the magnetic poles of the upper center magnetic steel and the lower center magnetic steel enables the center magnetic structure to have a stronger magnetic field, and the design of the upper magnetic conductive cover can improve the utilization rate of the magnetic force, so that the thickness of the center magnetic structure can be designed to be smaller; the magnetic lines of force of the center magnetic structure and the concave magnetic structure can be guided by the surrounding wall of the upper magnetic conductive cover, which greatly improves the magnetic conductivity of the magnetic circuit assembly and is conducive to further improving the utilization rate of the magnetic force; 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; in addition, the concave magnetic structure has the advantage of a large volume, which can greatly improve the magnetic field strength of the sound unit. 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; 2. Magnetic circuit assembly; 21. Yoke; 211. Avoidance structure; 22. Center magnetic structure; 221. Lower center magnetic steel; 222. Center washer; 223. Upper center magnetic steel; 224. Upper magnetic shield; 2241. Body; 2242. Enclosure; 2243. Avoidance gap; 23. Concave magnetic structure; 24. Side magnetic structure; 31. Inner voice coil; 32. Outer voice coil; 33. Diaphragm assembly; 331. Diaphragm; 332. Dome; 3321. Ring frame; 3322. Claw; 34. Centering support; 341. Inner mounting portion; 3411. Pad; 342. Cantilever portion; 343. Outer mounting portion. 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 assembly 2, wherein the magnetic circuit assembly 2 is connected to the basin frame 1, and the magnetic circuit assembly 2 includes a yoke 21 and a central magnetic structure 22, a concave magnetic structure 23 and an edge magnetic structure 24 respectively arranged on the yoke 21, wherein the central magnetic structure 22 includes a lower central magnetic steel 221, a central washer 222, an upper central magnetic steel 223 and an upper magnetic cover 224 connected in sequence from bottom to top, wherein the upper magnetic cover 224 includes a body 2241 and a surrounding wall 224 arranged along the edge of the body 2241 2. An inner magnetic gap is formed between the surrounding wall 2242 and the central magnetic structure 22; there are two concave magnetic structures 23, which are symmetrically arranged on both sides of the surrounding wall 2242, and a passage is formed between the two concave magnetic structures 23. The bottom end of the surrounding wall 2242 is provided with an avoidance gap 2243 connected to the passage; the side magnetic structure 24 is located on the outer side of the concave magnetic structure 23 and forms an outer magnetic gap with the concave magnetic structure 23; An inner voice coil 31, wherein the inner voice coil 31 can be raised and lowered in the inner magnetic gap; An outer voice coil 32, the outer voice coil 32 can be raised and lowered in the outer magnetic gap; A diaphragm assembly 33, wherein the diaphragm assembly 33 is connected to the basin frame 1, the upper magnetic conductive cover 224 and the outer voice coil 32; The centering support plate 34 includes an inner mounting portion 341, a cantilever portion 342 and an outer mounting portion 343 which are connected in sequence, the outer mounting portion 343 is connected to the basin frame 1, the outer mounting portion 343 is connected to the basin frame 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 passage and the avoidance gap 2243 to connect to the inner voice coil 31.

[0011] From the above description, it can be seen that the beneficial effects of the present invention are: the dual voice coil structure in the sound unit 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 223 and the lower center magnetic steel 221 makes the central magnetic structure 22 have a stronger magnetic field, and the design of the upper magnetic conductive cover 224 can improve the magnetic force utilization rate, so that the thickness of the central magnetic structure 22 can be designed to be smaller; the magnetic lines of force of the central magnetic structure 22 and the concave magnetic structure 23 can be guided by the surrounding wall 2242 of the upper magnetic conductive cover 224, which greatly improves the magnetic conductivity of the magnetic circuit assembly 2, which is conducive to further improving the magnetic force utilization rate; moreover, the vibration space of the inner voice coil 31 is large, so that the inner voice coil 31 can achieve a larger amplitude within a limited height space, so that the sound unit can achieve a large amplitude and ultra-thinness; in addition, the concave magnetic structure 23 has the advantage of a large volume, which can greatly improve the magnetic field strength of the sound unit.

[0012] Furthermore, the diaphragm assembly 33 includes a sound membrane 331, and the sound membrane 331 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 32, and the inner annular portion is connected to the upper magnetic conductive cover 224.

[0013] Furthermore, the diaphragm assembly 33 also includes a dome 332 , and the dome 332 includes a connected ring frame portion 3321 and a claw portion 3322 , the ring frame portion 3321 is connected to the connecting portion, the outer voice coil 32 is indirectly connected to the connecting portion through the ring frame portion 3321 , and the inner mounting portion 341 is connected to the claw portion 3322 .

[0014] From the above description, it can be seen that the setting of the ball top 332 can ensure the rigidity of the diaphragm assembly 33, and the cooperation between the ball top 332 and the inner mounting part 341 can effectively fix the outer voice coil 32, thereby making the structure of the sound unit more stable. At the same time, the claw part 3322 can provide support for the inner mounting part 341, improve the rigidity of the inner fixing part, reduce the risk of breakage of the inner mounting part 341, and ensure the synchronization of the amplitudes of the inner voice coil 31 and the outer voice coil 32.

[0015] Furthermore, a soldering pad 3411 is disposed on the inner mounting portion 341 , and the soldering pads 3411 are symmetrically disposed on both sides of the claw portion 3322 .

[0016] It can be seen from the above description that the structure of the inner installation portion 341 is reasonable, which is conducive to balancing the force on the inner installation portion 341.

[0017] Furthermore, the inner mounting portion 341 is disposed corresponding to the middle of the short axis side or the middle of the long axis side of the outer voice coil 32 .

[0018] It can be seen from the above description that the position of the centering support piece 34 in the sound unit can be selected and set according to actual needs.

[0019] Furthermore, the sound-emitting unit is a planar symmetrical structure.

[0020] It can be seen from the above description that the sound-emitting unit with a planar symmetrical structure can effectively improve the polarization phenomenon.

[0021] Furthermore, the surrounding wall 2242 is in contact with the yoke 21 .

[0022] It can be seen from the above description that the surrounding wall 2242 and the yoke 21 can support each other, which can not only improve the structural stability of the sound unit, but also maximize the magnetic conductivity of the upper magnetic cover 224.

[0023] Furthermore, the surrounding wall 2242 is fixedly connected to the yoke 21 .

[0024] It can be seen from the above description that the fixed connection between the surrounding wall 2242 and the yoke 21 can improve the structural stability of the sound unit to a greater extent.

[0025] Furthermore, the yoke 21 has an avoidance structure 211 for avoiding the centering support piece 34 .

[0026] Furthermore, the avoidance structure 211 is a blind groove or a through groove.

[0027] It can be seen from the above description that the avoidance structure 211 can prevent the centering support piece 34 from colliding with the yoke 21 .

[0028] Please refer to Figures 1 to 3 , Embodiment 1 of the present invention is: a sound unit, comprising a basin frame 1, a magnetic circuit assembly 2, an inner voice coil 31, an outer voice coil 32, a diaphragm assembly 33 and a centering support 34, wherein the magnetic circuit assembly 2 is connected to the basin frame 1, the magnetic circuit assembly 2 comprises a yoke 21 and a central magnetic structure 22, a concave magnetic structure 23 and a side magnetic structure 24 respectively arranged on the yoke 21, the central magnetic structure 22 comprises a lower central magnetic steel 221, a central washer 222, an upper central magnetic steel 223 and an upper magnetic conductive cover 224 which are sequentially connected from bottom to top, The bottom of the lower center magnetic steel 221 is connected to the yoke 21, and the upper magnetic shield 224 includes a main body 2241 and a surrounding wall 2242 arranged along the edge of the main body 2241. The main body 2241 and the surrounding wall 2242 are an integral structure formed by integral processing. An inner magnetic gap is formed between the surrounding wall 2242 and the central magnetic structure 22, and the inner voice coil 31 can be raised and lowered in the inner magnetic gap; the number of the concave magnetic structures 23 is two, and the two concave magnetic structures 23 are symmetrically arranged at On both sides of the surrounding wall 2242, a passage is formed between the two concave magnetic structures 23, and the bottom end of the surrounding wall 2242 is provided with an avoidance gap 2243 connected to the passage; the side magnetic structure 24 is located on the outside of the concave magnetic structure 23 and forms an outer magnetic gap with the concave magnetic structure 23, the outer voice coil 32 can be raised and lowered in the outer magnetic gap, the side magnetic structure 24 and / or the yoke 21 are connected to the basin frame 1; the diaphragm assembly 33 is connected to the basin frame 1, the upper magnetic cover 224 and the The outer voice coil 32, the centering support piece 34 includes 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 basin frame 1, the outer mounting portion 343 is connected to the basin frame 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 opening and the avoidance gap 2243 to connect to the inner voice coil 31. When the sound unit is working, the inner voice coil 31 and the outer voice coil 32 vibrate in the same direction and amplitude. In this embodiment, the sound unit is a planar symmetrical structure.

[0029] The edge magnetic structure 24 includes edge magnetic steel and edge washer, the edge washer is located above the edge magnetic steel, and the edge magnetic steel connects the edge washer and the yoke 21. The concave magnetic structure 23 includes concave magnetic steel and concave washer, the concave washer is located above the concave magnetic steel, and the concave magnetic steel connects the concave washer and the yoke 21. The concave magnetic steel can be an integral structure formed by integral processing, or a plurality of sub-magnets can be combined into a concave shape.

[0030] The diaphragm assembly 33 includes a sound membrane 331, and the sound membrane 331 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 32, and the inner annular portion is connected to the upper magnetic conductive cover 224. In order to ensure the lightness of the sound unit, the inner annular portion is connected to the outer wall surface of the surrounding wall 2242.

[0031] The diaphragm assembly 33 further includes a dome 332, and the dome 332 includes a ring frame portion 3321 and a claw portion 3322 connected to each other, the ring frame portion 3321 is connected to the connection portion, the outer voice coil 32 is indirectly connected to the connection portion through the ring frame portion 3321, and the inner mounting portion 341 is connected to the claw portion 3322. Preferably, the ring frame portion 3321 and the claw portion 3322 are an integrated structure formed by integral processing.

[0032] Since the sound unit of this embodiment supplies electricity to the inner voice coil 31 and the outer voice coil 32 through the centering support plate 34, in this embodiment, a soldering pad 3411 is provided on the inner mounting portion 341, and the soldering pads 3411 are symmetrically provided on both sides of the claw portion 3322. The soldering pads 3411 are used to electrically connect the inner voice coil 31 and / or the outer voice coil 32, and an electrical conductive portion that is conductive to the soldering pad 3411 is provided on the outer mounting portion 343, and the sound unit is conductive to an external power supply through the electrical conductive portion.

[0033] In this embodiment, the inner mounting portion 341 is disposed corresponding to the middle of the short axis side of the outer voice coil 32 . In other embodiments, the inner mounting portion 341 may be disposed corresponding to the middle of the long axis side of the outer voice coil 32 .

[0034] In order to improve the magnetic conductivity of the surrounding wall 2242, the surrounding wall 2242 is in contact with the yoke 21. Preferably, the surrounding wall 2242 is fixedly connected to the yoke 21. Specific connection methods include but are not limited to adhesive connection, welding, etc.

[0035] Optionally, the yoke 21 has an avoidance structure 211 for avoiding the centering support piece 34 , and the avoidance structure 211 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, a concave 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, an inner magnetic gap is formed between the surrounding wall and the central magnetic structure; the number of the concave magnetic structures is two, the two concave magnetic structures are symmetrically arranged on both sides of the surrounding wall, a through-opening is formed between the two concave magnetic structures, and an avoidance gap connected to the through-opening is provided at the bottom end of the surrounding wall; the side magnetic structure is located on the outer side of the concave magnetic structure and forms an outer magnetic gap with the concave magnetic structure; 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, wherein the centering support plate includes an inner mounting portion, a cantilever portion and an outer mounting portion which are connected in sequence, wherein the outer mounting portion is connected to the basin frame, the outer mounting portion is connected to the basin frame, one end of the inner mounting portion is connected to the outer voice coil, and the other end of the inner mounting portion passes through the passage and the avoidance gap to connect to the inner voice coil.

2. 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.

3. The sound generating unit according to claim 2, characterized in that: The diaphragm assembly also includes a dome, which includes a ring frame portion and a claw portion connected to each other. The ring frame portion is connected to the connecting portion, the outer voice coil is indirectly connected to the connecting portion through the ring frame portion, and the inner mounting portion is connected to the claw portion.

4. The sound generating unit according to claim 3, characterized in that: The inner mounting portion is provided with a soldering pad, and the soldering pads are symmetrically provided on both sides of the claw portion.

5. The sound generating unit according to claim 1, characterized in that: The inner mounting portion is arranged corresponding to the middle of the short axis side or the middle of the long axis side of the outer voice coil.

6. The sound generating unit according to claim 1, characterized in that: The sound generating unit is a planar symmetrical structure.

7. The sound generating unit according to claim 1, characterized in that: The surrounding wall is in contact with the yoke.

8. The sound generating unit according to claim 7, characterized in that: The surrounding wall is fixedly connected to the yoke.

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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