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, the magnetic circuit assembly comprises a yoke, and a central magnetic structure, a middle magnetic structure and an edge magnetic structure which are respectively arranged on the yoke, and the yoke is provided with a boss; a magnetic conductive cover is arranged on the central magnetic structure, the magnetic conductive cover comprises a body and a surrounding wall, an inner side magnetic gap is formed between the surrounding wall and the central magnetic structure, and a passing opening is formed in the surrounding wall; the magnetic conductive cover is located between the two oppositely-arranged middle magnetic structures. The edge magnetic structures are located on the outer sides of the middle magnetic structures, and outer side magnetic gaps are formed between the edge magnetic structures and the middle magnetic structures. The inner voice coil is arranged in the inner side magnetic gap in a liftable manner; the outer voice coil is arranged in the outer side magnetic gap in a liftable manner, and the boss is located between the inner voice coil and the outer voice coil; the vibrating diaphragm assembly is connected with the basin frame, the magnetic conductive cover and the outer voice coil; the centering disk is located between the inner voice coil and the outer voice coil, is connected with the outer voice coil and the boss, and is connected with the inner voice coil through the passing port. The sounding unit is light and thin in structure and good in performance.

Description

TECHNICAL FIELD

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

[0002] 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 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 well 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 on the yoke center magnetic structure, intermediate magnetic structure and edge magnetic structure, the yoke is equipped with boss;The center magnetic structure is equipped with magnetic flux guide cover, the magnetic flux guide cover includes body and the wall that is along the rim of the body and is arranged, the wall and the center magnetic structure between form inside magnetic gap, the wall is equipped with the mouth that is connected between inside and outside;The magnetic flux guide cover is located between at least this group of two intermediate magnetic structures oppositely arranged, the edge magnetic structure is located the outside of intermediate magnetic structure and forms outside magnetic gap between intermediate magnetic structure;

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

[0009] Outer voice coil, the outer voice coil can be lifted and is equipped in the outside magnetic gap, the boss is located between the inner voice coil and the outer voice coil;

[0010] Diaphragm assembly, the diaphragm assembly is connected the frame, magnetic flux guide cover and the outer voice coil;

[0011] Centering sheet, the centering sheet is located between the inner voice coil and outer voice coil, the centering sheet is connected the outer voice coil and boss, and is connected the inner voice coil via the mouth.

[0012] Further, the intermediate magnetic structure is located outside the long side of the inner voice coil, the centering bracket is located outside the short axis side of the inner voice coil; or, the intermediate magnetic structure is located outside the short side of the inner voice coil, the centering bracket is located outside the long axis side of the inner voice coil; or, the long side and the short side of the inner voice coil are respectively provided with the intermediate magnetic structure, and the centering bracket is located outside the corner of the inner voice coil.

[0013] Further, the number of the bosses is multiple, and a single centering bracket is connected to multiple bosses arranged at intervals.

[0014] Further, the centering bracket comprises a mounting portion, a cantilever portion and a fixing portion connected in sequence, the mounting portion connects the inner voice coil and the outer voice coil, the fixing portion is fixed on the boss, and the centering bracket is in conduction with the inner voice coil and the outer voice coil.

[0015] Further, the boss is a plastic part, the boss is embedded with a metal conductive part, the metal conductive part is in electrical conduction with the centering bracket, and the bottom end of the metal conductive part is exposed on the bottom surface of the yoke.

[0016] Further, the boss is provided with a through hole, the centering bracket further comprises a leading portion and an exposed portion, one end of the leading portion is connected to the fixing portion, the other end of the leading portion passes through the through hole and is connected to the exposed portion, the exposed portion is exposed on the bottom surface of the yoke, and the exposed portion is provided with an exposed pad.

[0017] Further, the bottom end of the surrounding wall is fixedly connected with the yoke.

[0018] Further, the center magnetic structure comprises a lower center magnetic steel, a center dust core and an upper center magnetic steel stacked and connected in sequence from bottom to top, the top surface of the upper center magnetic steel is connected with the body, and the bottom surface of the lower center magnetic steel is connected with the yoke.

[0019] Further, it further comprises a skeleton, the skeleton comprises a frame portion and a supporting leg connected with the frame portion, the frame portion is connected with the diaphragm assembly and the outer voice coil respectively, the supporting leg is located on the inner side of the outer voice coil, and the supporting leg is connected with the centering bracket.

[0020] Further, the diaphragm assembly as a whole is in a ring frame shape, and the inner edge of the diaphragm assembly is connected with the outer wall surface of the surrounding wall.

[0021] The beneficial effects of this utility model are as follows: The sound unit has a simple structure, and the dual voice coil architecture gives the sound unit a stronger driving force, resulting in better performance. The design of the magnetic shield can improve the utilization rate of magnetic force, allowing the thickness of the central magnetic structure to be designed to be smaller. Moreover, the vibration space of the inner voice coil is large, allowing the inner voice coil to achieve a larger amplitude within a limited height space, enabling the sound unit to achieve large amplitude and ultra-thin design. The centering support is located between the inner and outer voice coils, allowing the internal space of the sound unit to be fully utilized while allowing the total volume of the side magnetic structure to be larger, thereby improving the performance of the sound unit. The addition of the middle magnetic structure further enhances the performance of the sound unit. Attached Figure Description

[0022] Figure 1 Cross-section of the sound-producing unit Figure 1 ;

[0023] Figure 2 Cross-section of the sound-producing unit Figure 2 ;

[0024] Figure 3 A schematic diagram of the internal structure of the sound-generating unit;

[0025] Figure 4 Cross-section of the sound-producing unit Figure 3 .

[0026] Label Explanation:

[0027] 1. Pot stand;

[0028] 2. Magnetic circuit assembly; 21. Yoke; 211. Boss; 212. Metal conductive component; 22. Central magnetic structure; 221. Lower central magnet; 222. Central washer; 223. Upper central magnet; 23. Intermediate magnetic structure; 231. Intermediate magnet; 232. Intermediate washer; 24. Side magnetic structure; 241. Side magnet; 242. Side washer; 25. Magnetic guide cover; 251. Body; 252. Enclosure; 253. Pass-through;

[0029] 3. Inner voice coil;

[0030] 4. External voice coil;

[0031] 5. Diaphragm assembly;

[0032] 6. Centering support; 61. Mounting part; 62. Cantilever part; 63. Fixing part;

[0033] 7. Skeleton; 71. Frame-like part; 72. Supporting leg. Detailed Implementation

[0034] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0035] Please refer to Figures 1 to 4 The sound-generating unit includes:

[0036] 1. Water basin stand;

[0037] A magnetic circuit assembly 2 is connected to the basin frame 1. The magnetic circuit assembly 2 includes a yoke 21 and a central magnetic structure 22, an intermediate magnetic structure 23, and a side magnetic structure 24 respectively disposed on the yoke 21. The yoke 21 is provided with a boss 211. The central magnetic structure 22 is provided with a magnetic guide cover 25. The magnetic guide cover 25 includes a body 251 and a surrounding wall 252 disposed along the edge of the body 251. An inner magnetic gap is formed between the surrounding wall 252 and the central magnetic structure 22. The surrounding wall 252 is provided with an opening 253 connecting its inner and outer sides. The magnetic guide cover 25 is located between at least one set of two opposing intermediate magnetic structures 23. The side magnetic structure 24 is located outside the intermediate magnetic structure 23 and forms an outer magnetic gap with the intermediate magnetic structure 23.

[0038] Inner voice coil 3, which can be raised and lowered within the inner magnetic gap;

[0039] The outer voice coil 4 is vertically movable in the outer magnetic gap, and the boss 211 is located between the inner voice coil 3 and the outer voice coil 4.

[0040] Diaphragm assembly 5, which connects the frame 1, the magnetic cover 25 and the outer voice coil 4;

[0041] Centering support 6 is located between the inner voice coil 3 and the outer voice coil 4. The centering support 6 connects the outer voice coil 4 and the boss 211, and is connected to the inner voice coil 3 via the through 253.

[0042] As can be seen from the above description, the beneficial effects of this utility model are as follows: the sound unit has a simple structure, and the dual voice coil architecture gives the sound unit a stronger driving force, resulting in better performance; the design of the magnetic shield 25 can improve the magnetic utilization rate, allowing the thickness of the central magnetic structure 22 to be designed to be smaller, and the vibration space of the inner voice coil 3 is large, allowing the inner voice coil 3 to achieve a larger amplitude within a limited height space, enabling the sound unit to achieve large amplitude and ultra-thin design; the centering support 6 is located between the inner voice coil 3 and the outer voice coil 4, allowing the internal space of the sound unit to be fully utilized while allowing the total volume of the side magnetic structure 24 to be set larger, thereby improving the performance of the sound unit; and the addition of the intermediate magnetic structure 23 further enhances the performance of the sound unit.

[0043] Further, the intermediate magnetic structure 23 is located outside the long side of the inner voice coil 3, and the centering branch 6 is located outside the short axis side of the inner voice coil 3; or the intermediate magnetic structure 23 is located outside the short side of the inner voice coil 3, and the centering branch 6 is located outside the long axis side of the inner voice coil 3; or the long side and the short side of the inner voice coil 3 are respectively provided with the intermediate magnetic structure 23, and the centering branch 6 is located outside the corner of the inner voice coil 3.

[0044] As can be seen from the above description, the position of the centering branch 6 can be set as needed, which is beneficial to the diversity of the sound generating unit.

[0045] Further, the number of the bosses 211 is multiple, and a single centering branch 6 is connected to multiple bosses 211 arranged at intervals.

[0046] As can be seen from the above description, the connection of the centering branch 6 to multiple bosses 211 can make the installation of the centering branch 6 more stable.

[0047] Further, the centering branch 6 comprises a mounting portion 61, a cantilever portion 62 and a fixing portion 63 connected in sequence, the mounting portion 61 connects the inner voice coil 3 and the outer voice coil 4, the fixing portion 63 is fixed on the boss 211, and the centering branch 6 is in conduction with the inner voice coil 3 and the outer voice coil 4.

[0048] As can be seen from the above description, the inner voice coil 3 and the outer voice coil 4 are both in conduction with the external power supply through the centering branch 6, which cancels the voice coil suspension line design and avoids the risk of voice coil disconnection.

[0049] Further, the boss 211 is a plastic part, and a metal conductive part 212 is embedded in the boss 211, the metal conductive part 212 is in electrical conduction with the centering branch 6, and the bottom end of the metal conductive part 212 is exposed on the bottom surface of the yoke 21.

[0050] Further, the boss 211 is provided with a through hole, and the centering branch 6 further comprises a leading portion and an exposed portion, one end of the leading portion is connected to the fixing portion 63, the other end of the leading portion passes through the through hole and is connected to the exposed portion, the exposed portion is exposed on the bottom surface of the yoke 21, and the exposed portion is provided with an exposed pad.

[0051] As can be seen from the above description, there are multiple specific conduction structures between the sound generating unit and the external power supply, which enriches the diversity of the sound generating unit.

[0052] Further, the bottom end of the surrounding wall 252 is fixedly connected with the yoke 21.

[0053] From the above description, the fixed connection of the surrounding wall 252 and the yoke 21 is conducive to improving the structural stability of the sound unit.

[0054] Further, the center magnetic structure 22 includes a lower center magnetic steel 221, a center dust shield 222, and an upper center magnetic steel 223 stacked in sequence from bottom to top and connected in sequence, the top surface of the upper center magnetic steel 223 is connected to the body 251, and the bottom surface of the lower center magnetic steel 221 is connected to the yoke 21.

[0055] From the above description, the magnetic poles of the upper center magnetic steel 223 and the lower center magnetic steel 221 are opposite, so that the center magnetic structure 22 has a stronger magnetic field, which is conducive to improving the performance of the sound unit to a greater extent.

[0056] Further, it also includes a skeleton 7, the skeleton 7 includes a frame-shaped part 71 and a support leg 72 connecting the frame-shaped part 71, the frame-shaped part 71 is connected to the diaphragm assembly 5 and the outer voice coil 4 respectively, the support leg 72 is located on the inner side of the outer voice coil 4, and the support leg 72 is connected to the centering bracket 6.

[0057] From the above description, the outer voice coil 4 is indirectly connected to the centering bracket 6 through the support leg 72, and the frame-shaped part 71 of the skeleton 7 can make the bottom end of the outer voice coil 4 deeper into the outer magnetic gap, thereby improving the sensitivity of the sound unit.

[0058] Further, the diaphragm assembly 5 is in the shape of a ring frame as a whole, and the inner edge of the diaphragm assembly 5 is connected to the outer wall surface of the surrounding wall 252.

[0059] From the above description, the diaphragm assembly 5 is connected to the surrounding wall 252 of the magnetic shield 25 instead of the top surface, which is conducive to the control of the cross-sectional height of the sound unit, so that the sound unit can remain light and thin.

[0060] Please refer to Figures 1 to 4The utility model discloses an embodiment one for: sounding unit, including basin frame 1, magnetic circuit subassembly 2, inner voice coil 3, outer voice coil 4, diaphragm subassembly 5 and centering support piece 6, magnetic circuit subassembly 2 connects basin frame 1, magnetic circuit subassembly 2 includes yoke iron 21 and respectively located on the center magnetic structure 22, intermediate magnetic structure 23 and side magnetic structure 24 of yoke iron 21, side magnetic structure 24 connects basin frame 1, yoke iron 21 is equipped with boss 211, the center magnetic structure 22 is equipped with magnetic conduction cover 25, magnetic conduction cover 25 includes body 251 and the surrounding wall 252 along the edge of body 251 is arranged, and the inside magnetic gap is formed between surrounding wall 252 and center magnetic structure 22, and the through mouth 253 that communicates its inside and outside is equipped on surrounding wall 252, magnetic conduction cover 25 is located between at least this group of two intermediate magnetic structures 23 oppositely arranged, and side magnetic structure 24 is located the outside of intermediate magnetic structure 23 and forms the outside magnetic gap between intermediate magnetic structure 23, inner voice coil 3 can be lifted and is equipped in the inside magnetic gap, outer voice coil 4 can be lifted and is equipped in the outside magnetic gap, boss 211 is located between inner voice coil 3 and outer voice coil 4, diaphragm subassembly 5 connects basin frame 1, magnetic conduction cover 25 and outer voice coil 4, centering support piece 6 is located between inner voice coil 3 and outer voice coil 4, centering support piece 6 connects outer voice coil 4 and boss 211, and is connected via the through mouth 253 inner voice coil 3.

[0061] Intermediate magnetic structure 23 is located the outside of short side of inner voice coil 3, and centering support piece 6 is located the outside of long axis side of inner voice coil 3, or, the outside of long side of inner voice coil 3 and the outside of short side are correspondingly equipped with intermediate magnetic structure 23 respectively, and centering support piece 6 is located the outside of corner of inner voice coil 3.In this embodiment, intermediate magnetic structure 23 is located the outside of long side of inner voice coil 3, and centering support piece 6 is located the outside of short axis side of inner voice coil 3.

[0062] Centering support piece 6 includes mounting portion 61, cantilever portion 62 and fixed portion 63 that are sequentially connected, mounting portion 61 connects inner voice coil 3 and outer voice coil 4, fixed portion 63 is fixed on boss 211, and centering support piece 6 is conducted with inner voice coil 3 and outer voice coil 4.

[0063] In other embodiments, the single centering vane 6 can only have one fixing portion 63, at this time, the single centering vane 6 can only be connected with one boss 211, and in other embodiments, the number of bosses 211 can be multiple, at this time, the single centering vane 6 can be connected with multiple bosses 211 arranged at intervals. In the embodiment, the two ends of the mounting portion 61 in the centering vane 6 are respectively connected with the cantilever portions 62, and the ends of the two cantilever portions 62 away from each other are respectively connected with the fixing portions 63, so that the centering vane 6 of the embodiment is connected with two bosses 211 at the same time, which can effectively improve the stability of the installation of the centering vane 6.

[0064] In the embodiment, the boss 211 is a plastic part, and the boss 211 is embedded with a metal conductive part 212, the metal conductive part 212 is in electrical conduction with the centering vane 6, and the bottom end of the metal conductive part 212 is exposed on the bottom surface of the yoke 21 for conduction with an external power supply. In other embodiments, the boss 211 is provided with a through hole, and the centering vane 6 further includes a lead-out portion and an exposed portion, one end of the lead-out portion is connected with the fixing portion 63, the other end of the lead-out portion is connected with the exposed portion through the through hole, the exposed portion is exposed on the bottom surface of the yoke 21, and the exposed portion is provided with an exposed pad.

[0065] As a preferred embodiment, the bottom end of the surrounding wall 252 is fixedly connected with the yoke 21, and the specific connection modes include but are not limited to adhesive connection, welding and the like.

[0066] The intermediate magnetic structure 23 includes an intermediate magnetic steel 231 and an intermediate amorphous steel 232, the intermediate magnetic steel 231 connects the yoke 21 and the intermediate amorphous steel 232; the edge magnetic structure 24 includes an edge magnetic steel 241 and an edge amorphous steel 242, the edge magnetic steel 241 connects the edge amorphous steel 242 and the yoke 21; the center magnetic structure 22 includes a lower center magnetic steel 221, a center amorphous steel 222 and an upper center magnetic steel 223 stacked and connected in order from bottom to top, the top surface of the upper center magnetic steel 223 is connected with the body 251, the bottom surface of the lower center magnetic steel 221 is connected with the yoke 21, and the upper center magnetic steel 223 and the lower center magnetic steel 221 have opposite magnetic pole directions.

[0067] The sound generating unit further includes a skeleton 7, the skeleton 7 includes a frame-shaped portion 71 and a support leg 72 connecting the frame-shaped portion 71, the frame-shaped portion 71 is respectively connected with the diaphragm assembly 5 and the outer voice coil 4, the support leg 72 is located on the inner side of the outer voice coil 4, and the support leg 72 is connected with the centering vane 6, in detail, the support leg 72 is in the shape of L, and the outer voice coil 4 is indirectly connected with the mounting portion 61 of the centering vane 6 through the support leg 72.

[0068] The vibrating diaphragm assembly 5 is in a ring frame shape as a whole, and the inner edge of the vibrating diaphragm assembly 5 is connected to the outer wall surface of the enclosing wall 252.

[0069] In summary, the sound emitting unit provided by the utility model has simple structure, the double voice coil structure makes the sound emitting unit have stronger driving force, and the sound emitting unit has better performance; the design of the magnetic conducting cover can improve the utilization rate of magnetic force, the thickness of the center magnetic structure can be designed to be smaller, moreover, the vibration space of the inner voice coil is large, so that the inner voice coil can achieve larger amplitude in the limited height space, and the sound emitting unit can realize large amplitude and ultra-thin; the centering web is arranged between the inner voice coil and the outer voice coil, so that the internal space of the sound emitting unit can be fully utilized, and the total volume of the side magnetic structure can be set larger, thereby improving the performance of the sound emitting unit; and the addition of the intermediate magnetic structure further improves the performance of the sound emitting unit.

[0070] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation, direct or indirect application in related technical fields by using the content of the utility model specification and drawings are 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, an intermediate magnetic structure, and a side magnetic structure respectively disposed on the yoke. The yoke has a boss. A magnetic guide cover is disposed on the central magnetic structure. The magnetic guide cover includes a body and a surrounding wall disposed along the edge of the body. An inner magnetic gap is formed between the surrounding wall and the central magnetic structure. The surrounding wall has an opening connecting its inner and outer sides. The magnetic guide cover is located between at least one set of two oppositely disposed intermediate magnetic structures. The side magnetic structure is located outside the intermediate magnetic structure and forms an outer magnetic gap with the intermediate magnetic structure. 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, and a boss located between the inner voice coil and the outer voice coil; A diaphragm assembly, wherein the diaphragm assembly is connected to the frame, the magnetic cover and the outer voice coil; A centering support is located between the inner voice coil and the outer voice coil. The centering support connects the outer voice coil and the boss, and is connected to the inner voice coil via the port.

2. The sound-generating unit according to claim 1, characterized in that, The intermediate magnetic structure is located outside the long side of the inner voice coil, and the centering support is located outside the short axis of the inner voice coil; or, the intermediate magnetic structure is located outside the short side of the inner voice coil, and the centering support is located outside the long axis of the inner voice coil; or, the intermediate magnetic structure is respectively provided on the outer side of the long side and the outer side of the short side of the inner voice coil, and the centering support is located outside the corner of the inner voice coil.

3. The sound-generating unit according to claim 1, characterized in that, The number of protrusions is multiple, and a single centering support plate connects multiple protrusions that are spaced apart.

4. The sound-generating unit according to claim 1, characterized in that, The centering support includes a mounting part, a cantilever part, and a fixing part connected in sequence. The mounting part connects the inner voice coil and the outer voice coil, and the fixing part is fixed to the boss. The centering support is in communication with the inner voice coil and the outer voice coil.

5. The sound-generating unit according to claim 4, characterized in that, The boss is a plastic part, and a metal conductive element is embedded in the boss. The metal conductive element is electrically connected to the centering support plate, and the bottom end of the metal conductive element is exposed on the bottom surface of the yoke.

6. The sound-generating unit according to claim 4, characterized in that, The boss is provided with a through hole, and the centering support plate also includes a lead-out part and an exposed part. One end of the lead-out part is connected to the fixing part, and the other end of the lead-out part passes through the through hole and is connected to the exposed part. The exposed part is exposed on the bottom surface of the yoke, and the exposed part is provided with an exposed solder pad.

7. The sound-generating unit according to claim 1, characterized in that, The bottom end of the enclosure is fixedly connected to the yoke.

8. The sound-generating unit according to claim 1, characterized in that, The central magnetic structure includes a lower central magnet, a central washer, and an upper central magnet stacked and connected sequentially from bottom to top. The top surface of the upper central magnet is connected to the main body, and the bottom surface of the lower central magnet is connected to the yoke.

9. The sound-generating unit according to claim 1, characterized in that, It also includes a skeleton, which includes a frame-shaped part and a support foot connecting the frame-shaped part. The frame-shaped part is connected to the diaphragm assembly and the outer voice coil, respectively. The support foot is located inside the outer voice coil and is connected to the centering support plate.

10. The sound-generating unit according to claim 1, characterized in that, The diaphragm assembly is generally in the shape of a ring frame, and the inner edge of the diaphragm assembly is connected to the outer wall surface of the enclosure.

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