CN216122875U - Miniature loudspeaker - Google Patents
Miniature loudspeaker Download PDFInfo
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- CN216122875U CN216122875U CN202121503120.5U CN202121503120U CN216122875U CN 216122875 U CN216122875 U CN 216122875U CN 202121503120 U CN202121503120 U CN 202121503120U CN 216122875 U CN216122875 U CN 216122875U
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Abstract
The utility model discloses a micro loudspeaker, which comprises a frame, and a magnetic circuit assembly and a vibration assembly which are respectively arranged on the frame, wherein the magnetic circuit assembly comprises a magnetic bowl and first central magnetic steel arranged on the magnetic bowl, and the top surface of the first central magnetic steel is provided with a central washer; the vibration assembly comprises a sound film and a dome arranged on the sound film, wherein the top surface of the central washer is provided with second central magnetic steel with the polarity opposite to that of the first central magnetic steel, and the middle part of the dome is provided with a convex hull part capable of containing the top of the second central magnetic steel. The top surface of center china department adds the center magnet steel and sets up the convex closure portion that can accept the center magnet steel of addding on the ball-top, under the prerequisite of guaranteeing that miniature speaker can realize big amplitude, promotes miniature speaker's magnetic flux effectively to improve miniature speaker's overall sensitivity, improved miniature speaker's BL performance parameter, reach and promote miniature speaker product property ability, optimize the purpose that the user listened.
Description
Technical Field
The utility model relates to the technical field of electroacoustic transducers, in particular to a miniature loudspeaker.
Background
The micro-speaker is widely applied to portable electronic equipment such as mobile phones, notebook computers, hearing aids and the like.
The micro loudspeaker comprises a frame, and a magnetic circuit assembly and a vibration assembly which are respectively arranged on the frame, wherein the magnetic circuit assembly comprises a magnetic bowl, and a central magnetic steel and side magnetic steels which are respectively arranged on the magnetic bowl, the number of the side magnetic steels is multiple, the central magnetic steel is positioned between at least one group of two oppositely arranged side magnetic steels, a magnetic gap is formed between the central magnetic steel and the side magnetic steels, the top surface of the central magnetic steel is provided with a central washer, and the top surface of the side magnetic steel is provided with a side washer; the vibration subassembly includes the vibrating diaphragm subassembly and locates voice coil loudspeaker voice coil on the vibrating diaphragm subassembly, the bottom of voice coil loudspeaker voice coil stretches into the magnetism clearance, the vibrating diaphragm subassembly includes the sound membrane and locates the dome on the sound membrane, the dome is located the middle part of sound membrane and corresponding to center china department sets up.
Receive the restriction of miniature speaker volume, among the prior art, magnetic circuit assembly's performance hardly obtains promoting, if the volume (height dimension) of direct increase center magnet steel, then will probably lead to miniature speaker's amplitude to suffer reducing, consequently, prior art lacks the miniature speaker of big amplitude of a section high sensitivity.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: a high-sensitivity large-amplitude micro-speaker is provided.
In order to solve the technical problems, the utility model adopts the technical scheme that: a micro loudspeaker comprises a frame, a magnetic circuit assembly and a vibration assembly, wherein the magnetic circuit assembly and the vibration assembly are respectively arranged on the frame; the vibration assembly comprises a sound film and a dome arranged on the sound film, wherein the top surface of the central washer is provided with second central magnetic steel with the polarity opposite to that of the first central magnetic steel, and the middle part of the dome is provided with a convex hull part capable of containing the top of the second central magnetic steel.
Furthermore, the dome includes roof, leg and shirt rim, the leg is along the edge of roof is the round setting, the bottom of leg is outwards buckled to extend and is formed the shirt rim, the shirt rim with the sound membrane is connected fixedly, the roof with the leg forms after being connected the convex closure portion.
Furthermore, the dome is an integrated structure formed integrally.
Further, the sound membrane comprises an inner fixing part, a folded ring part and an outer fixing part which are sequentially connected from inside to outside, the inner fixing part is in a ring frame shape, the skirt edge is connected with the inner fixing part, and the outer fixing part is connected with the basin frame.
Further, the skirt is attached to a top surface of the inner fixing portion.
Furthermore, an avoiding surface for avoiding the folded ring part is arranged on the inner side of the top of the basin frame.
Furthermore, the magnetic circuit component further comprises edge magnetic steel arranged on the magnetic bowl, an edge washer is arranged on the top surface of the edge magnetic steel, and an avoiding groove used for avoiding the folded ring portion is formed in the top surface of the edge washer.
Furthermore, the side washer and the basin frame are of an integrated structure formed by insert injection molding.
Further, the edge washer and the center washer are arranged in alignment.
Furthermore, the vibration assembly further comprises a voice coil connected with the voice film or the ball top, and the magnetic bowl is provided with a position avoiding groove corresponding to the voice coil.
The utility model has the beneficial effects that: the top surface of center china department adds the center magnet steel and sets up the convex closure portion that can accept the center magnet steel of addding on the ball-top, under the prerequisite of guaranteeing that miniature speaker can realize big amplitude, promotes miniature speaker's magnetic flux effectively to improve miniature speaker's overall sensitivity, improved miniature speaker's BL performance parameter, reach and promote miniature speaker product property ability, optimize the purpose that the user listened.
Drawings
Fig. 1 is an exploded view of a micro-speaker of the present invention;
fig. 2 is a cross-sectional view of a micro-speaker according to a first embodiment of the present invention;
fig. 3 is a cross-sectional view of a micro-speaker according to a second embodiment of the present invention.
Description of reference numerals:
1. a basin stand; 11. an avoidance surface;
2. a magnetic bowl; 21. a position avoiding groove;
3. a first central magnetic steel;
4. edge magnetic steel;
5. a border washer; 51. an avoidance groove;
6. a central washer;
7. a second central magnetic steel;
8. a sound membrane; 81. an inner fixing portion; 82. a folded ring part; 83. an outer fixing portion;
9. a ball top; 91. a convex hull part; 92. a top plate; 93. a surrounding wall; 94. a skirt edge;
10. a voice coil.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 3, a micro speaker includes a frame 1, and a magnetic circuit component and a vibration component respectively disposed on the frame 1, where the magnetic circuit component includes a magnetic bowl 2 and a first central magnetic steel 3 disposed on the magnetic bowl 2, and a central washer 6 is disposed on a top surface of the first central magnetic steel 3; the vibration component comprises a sound film 8 and a dome 9 arranged on the sound film 8, wherein the top surface of the center washer 6 is provided with a second center magnetic steel 7 with the polarity opposite to that of the first center magnetic steel 3, and the middle part of the dome 9 is provided with a convex hull part 91 capable of containing the top part of the second center magnetic steel 7.
From the above description, the beneficial effects of the present invention are: the center magnetic steel is additionally arranged on the top surface of the center washer 6, the convex hull part 91 capable of accommodating the additionally arranged center magnetic steel is arranged on the ball top 9, and on the premise that the micro loudspeaker can realize large amplitude, the magnetic flux of the micro loudspeaker is effectively improved, so that the overall sensitivity of the micro loudspeaker is improved, the BL performance parameters of the micro loudspeaker are improved, and the purposes of improving the performance of the micro loudspeaker and optimizing the listening sensation of a user are achieved.
Further, the dome 9 includes a top plate 92, a surrounding wall 93 and a skirt 94, the surrounding wall 93 is disposed in a circle along an edge of the top plate 92, a bottom end of the surrounding wall 93 is bent and extended towards an outer side to form the skirt 94, the skirt 94 is connected and fixed with the sound diaphragm 8, and the top plate 92 is connected with the surrounding wall 93 to form the convex hull portion 91.
As can be seen from the above description, the dome 9 has a simple and stable structure and is easy to machine and form.
Further, the dome 9 is an integrally formed integral structure.
As can be seen from the above description, the dome 9 has good integrity and is structurally stable.
Further, the sound diaphragm 8 comprises an inner fixing part 81, a ring-folded part 82 and an outer fixing part 83 which are sequentially connected from inside to outside, the inner fixing part 81 is in a ring frame shape, the skirt edge 94 is connected with the inner fixing part 81, and the outer fixing part 83 is connected with the basin stand 1.
As can be seen from the above description, the sound diaphragm 8 has a simple structure and is easy to manufacture.
Further, the skirt 94 is attached to the top surface of the inner fixing portion 81.
As can be seen from the above description, the skirt 94 attached to the top surface of the inner fixing portion 81 can increase the vibration margin of the vibration assembly, thereby increasing the vibration amplitude of the micro-speaker.
Further, an avoiding surface 11 for avoiding the folded ring part 82 is arranged on the inner side of the top of the basin stand 1.
As can be seen from the above description, the arrangement of the avoiding surface 11 can effectively prevent the sound film 8 from colliding with the frame 1 to generate noise during operation, which is beneficial to ensuring the acoustic performance of the micro-speaker.
Further, the magnetic circuit component further comprises edge magnetic steel 4 arranged on the magnetic bowl 2, an edge washer 5 is arranged on the top surface of the edge magnetic steel 4, and an avoiding groove 51 used for avoiding the folded ring part 82 is arranged on the top surface of the edge washer 5.
As can be seen from the above description, the arrangement of the avoiding groove 51 can prevent the sound film 8 from colliding with the edge washer 5 during operation to generate noise, which is beneficial to ensuring the acoustic performance of the micro-speaker.
Further, the edge washer 5 and the basin frame 1 are of an integrated structure formed by insert injection molding.
According to the description, the connection mode of the edge washer 5 and the basin frame 1 is simple, stable and reliable, the assembly work of the micro loudspeaker can be simplified, the assembly efficiency of the micro loudspeaker can be improved, and therefore the manufacturing cost of the micro loudspeaker can be reduced.
Further, the edge washer 5 is aligned with the center washer 6.
As can be seen from the above description, the edge washers 5 and the center washers 6 are aligned to ensure that the first center magnetic steel 3 and the second center magnetic steel 7 can form magnetic loops, respectively.
Further, the vibration assembly further comprises a voice coil 10 connected with the voice diaphragm 8 or the dome 9, and the magnetic bowl 2 is provided with a position avoiding groove 21 corresponding to the voice coil 10.
As can be seen from the above description, the provision of the spacing groove 21 can further increase the vibration margin of the vibration assembly, thereby improving the amplitude of the micro-speaker.
Example one
Referring to fig. 1 and fig. 2, a first embodiment of the present invention is: a micro speaker can be applied to portable electronic products such as mobile phones, tablet computers, portable game machines, intelligent watches, interphones and the like.
The micro loudspeaker comprises a basin frame 1, a magnetic circuit component and a vibration component which are respectively arranged on the basin frame 1, the magnetic circuit component comprises a magnetic bowl 2, a first central magnetic steel 3, a side magnetic steel 4, a side washer 5, a central washer 6 and a second central magnetic steel 7, the first central magnetic steel 3 and the side magnetic steel 4 are respectively and fixedly arranged on the magnetic bowl 2, the first central magnetic steel 3 is positioned between at least one group of two side magnetic steels 4 which are oppositely arranged, a magnetic gap is formed between the first central magnetic steel 3 and the side magnetic steel 4, the central washer 6 is arranged on the top surface of the first central magnetic steel 3, the second central magnetic steel 7 is arranged on the top surface of the central washer 6, the polarity of the second central magnetic steel 7 is opposite to that of the first central magnetic steel 3, the side washer 5 is arranged on the top surface of the side magnetic steel 4, optionally, the edge washer 5 and the basin stand 1 are of an integrated structure formed by insert injection molding. In this embodiment, the number of the side magnetic steels 4 is two, and in other embodiments, the number of the side magnetic steels 4 may also be four, six or more. Preferably, the edge washer 5 is aligned with the central washer 6.
The vibration component comprises a sound film 8, a dome 9 and a voice coil 10, wherein the dome 9 is arranged on the sound film 8, the top of the voice coil 10 is connected with the sound film 8, the bottom of the voice coil 10 extends into the magnetic gap, and the middle of the dome 9 is provided with a convex hull part 91 capable of accommodating the top of the second central magnetic steel 7.
In detail, the dome 9 includes a top plate 92, a surrounding wall 93 and a skirt 94, the surrounding wall 93 is along the edge of the top plate 92 is a circle, the bottom end of the surrounding wall 93 is bent towards the outside and extends to form the skirt 94, the skirt 94 is connected and fixed with the sound membrane 8, the top plate 92 is connected with the surrounding wall 93 and then forms the convex hull part 91, and in order to guarantee the structural stability and the processing convenience of the dome 9, the dome 9 is preferably of an integrally formed integrated structure.
More in detail, the voice diaphragm 8 includes an inner fixing portion 81, a ring-folded portion 82 and an outer fixing portion 83 which are sequentially connected from inside to outside, the inner fixing portion 81 is in a ring frame shape, the skirt 94 is connected to the inner fixing portion 81, the outer fixing portion 83 is connected to the basin frame 1, the skirt 94 is connected to the top surface of the inner fixing portion 81, and the bottom surface of the inner fixing portion 81 is connected to the voice coil 10.
In order to avoid the collision of the vibrating diaphragm and the basin frame 1 when the micro speaker works, the inner side of the top of the basin frame 1 is provided with an avoiding surface 11 for avoiding the folded ring part 82. In this embodiment, the avoiding surface 11 is an arc surface, and in other embodiments, the avoiding surface 11 may be an inclined surface or a stepped surface.
In order to prevent the diaphragm from colliding with the edge washer 5 when the micro-speaker works, the top surface of the edge washer 5 is provided with an avoiding groove 51 for avoiding the position of the folded ring part 82.
In a preferred embodiment, the magnetic bowl 2 has a spacing groove 21 corresponding to the voice coil 10, and the spacing groove 51 can further increase the downward vibration space of the vibration assembly, thereby increasing the amplitude of the micro-speaker.
Example two
Referring to fig. 1 and fig. 3, a second embodiment of the present invention is: a micro speaker can be applied to portable electronic products such as mobile phones, tablet computers, portable game machines, intelligent watches, interphones and the like.
The micro loudspeaker comprises a basin frame 1, a magnetic circuit component and a vibration component which are respectively arranged on the basin frame 1, the magnetic circuit component comprises a magnetic bowl 2, a first central magnetic steel 3, a side magnetic steel 4, a side washer 5, a central washer 6 and a second central magnetic steel 7, the first central magnetic steel 3 and the side magnetic steel 4 are respectively and fixedly arranged on the magnetic bowl 2, the first central magnetic steel 3 is positioned between at least one group of two side magnetic steels 4 which are oppositely arranged, a magnetic gap is formed between the first central magnetic steel 3 and the side magnetic steel 4, the central washer 6 is arranged on the top surface of the first central magnetic steel 3, the second central magnetic steel 7 is arranged on the top surface of the central washer 6, the polarity of the second central magnetic steel 7 is opposite to that of the first central magnetic steel 3, the side washer 5 is arranged on the top surface of the side magnetic steel 4, optionally, the edge washer 5 and the basin stand 1 are of an integrated structure formed by insert injection molding. In this embodiment, the number of the side magnetic steels 4 is two, and in other embodiments, the number of the side magnetic steels 4 may also be four, six or more. Preferably, the edge washer 5 is aligned with the central washer 6.
The vibration component comprises a sound film 8, a dome 9 and a voice coil 10, wherein the dome 9 is arranged on the sound film 8, the top of the voice coil 10 is connected with the dome 9, the bottom of the voice coil 10 extends into the magnetic gap, and the middle of the dome 9 is provided with a convex hull part 91 capable of accommodating the top of the second central magnetic steel 7.
In detail, the dome 9 includes a top plate 92, a surrounding wall 93 and a skirt 94, the surrounding wall 93 is along the edge of the top plate 92 is a circle, the bottom end of the surrounding wall 93 is bent towards the outside and extends to form the skirt 94, the top surface of the skirt 94 is connected and fixed with the sound membrane 8, the bottom surface of the skirt 94 is connected with the voice coil 10, the top plate 92 is connected with the surrounding wall 93 to form the convex hull part 91, and preferably, the dome 9 is an integrally formed integral structure for ensuring the structural stability and the processing convenience of the dome 9.
More in detail, the sound diaphragm 8 comprises an inner fixing part 81, a ring-folded part 82 and an outer fixing part 83 which are sequentially connected from inside to outside, the inner fixing part 81 is in a ring frame shape, the top surface of the skirt edge 94 is connected with the inner fixing part 81, and the outer fixing part 83 is connected with the basin frame 1.
In order to avoid the collision of the vibrating diaphragm and the basin frame 1 when the micro speaker works, the inner side of the top of the basin frame 1 is provided with an avoiding surface 11 for avoiding the folded ring part 82. In this embodiment, the avoiding surface 11 is an arc surface, and in other embodiments, the avoiding surface 11 may be an inclined surface or a stepped surface.
In order to prevent the diaphragm from colliding with the edge washer 5 when the micro-speaker works, the top surface of the edge washer 5 is provided with an avoiding groove 51 for avoiding the position of the folded ring part 82.
In a preferred embodiment, the magnetic bowl 2 has a spacing groove 21 corresponding to the voice coil 10, and the spacing groove 51 can further increase the downward vibration space of the vibration assembly, thereby increasing the amplitude of the micro-speaker.
In summary, according to the micro-speaker provided by the utility model, the central magnetic steel is additionally arranged on the top surface of the central washer, and the convex hull capable of accommodating the additionally arranged central magnetic steel is arranged on the dome, so that the magnetic flux of the micro-speaker is effectively improved on the premise of ensuring that the micro-speaker can realize large amplitude, the overall sensitivity of the micro-speaker is improved, the BL performance parameters of the micro-speaker are improved, and the purposes of improving the product performance of the micro-speaker and optimizing the listening sensation of a user are achieved; the distance between the top surface of the frame and the bottom surface of the magnetic bowl does not need to be changed, namely the mounting height of the micro loudspeaker does not need to be increased, and the development trend of light and thin electronic products is met; the washer and the basin stand insert are molded by injection, so that the assembly and production of the micro loudspeaker can be facilitated, the production efficiency of the micro loudspeaker can be improved, and the manufacturing cost of the micro loudspeaker can be reduced; the basin frame is provided with the avoiding surface, and the side washer is provided with the avoiding groove, so that noise generated when the micro loudspeaker works can be effectively avoided; keep away the setting in position groove on the magnetic bowl and can provide more surplus that shakes down for the voice coil loudspeaker voice coil, do benefit to the increase of miniature speaker amplitude.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A micro loudspeaker comprises a frame, a magnetic circuit assembly and a vibration assembly, wherein the magnetic circuit assembly and the vibration assembly are respectively arranged on the frame; the vibration subassembly includes the sound membrane and locates the dome on the sound membrane, its characterized in that: the top surface of the central washer is provided with a second central magnetic steel with the polarity opposite to that of the first central magnetic steel, and the middle part of the spherical top is provided with a convex hull part capable of accommodating the top of the second central magnetic steel.
2. The micro-speaker of claim 1, wherein: the dome includes roof, leg and shirt rim, the leg is followed the edge of roof is the round setting, the bottom of leg is buckled towards the outside and is extended and form the shirt rim, the shirt rim with the sound membrane is connected fixedly, the roof with the leg is connected the back and is formed convex closure portion.
3. The micro-speaker of claim 2, wherein: the dome is of an integrated structure formed integrally.
4. The micro-speaker of claim 2, wherein: the voice diaphragm comprises an inner fixing part, a folded ring part and an outer fixing part which are sequentially connected from inside to outside, the inner fixing part is in a ring frame shape, the skirt edge is connected with the inner fixing part, and the outer fixing part is connected with the basin stand.
5. The micro-speaker of claim 4, wherein: the skirt is connected to the top surface of the inner fixing portion.
6. The micro-speaker of claim 4, wherein: the inner side of the top of the basin frame is provided with an avoiding surface used for avoiding the folded ring part.
7. The micro-speaker of claim 4, wherein: the magnetic circuit component further comprises edge magnetic steel arranged on the magnetic bowl, an edge washer is arranged on the top surface of the edge magnetic steel, and an avoiding groove used for avoiding the folded ring portion is formed in the top surface of the edge washer.
8. The micro-speaker of claim 7, wherein: the side washer and the basin frame are of an integrated structure formed by insert injection molding.
9. The micro-speaker of claim 7, wherein: the edge washer and the center washer are arranged in an aligned mode.
10. The micro-speaker of claim 1, wherein: the vibration assembly further comprises a voice coil connected with the voice film or the ball top, and the magnetic bowl is provided with a position avoiding groove corresponding to the voice coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121503120.5U CN216122875U (en) | 2021-07-01 | 2021-07-01 | Miniature loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121503120.5U CN216122875U (en) | 2021-07-01 | 2021-07-01 | Miniature loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216122875U true CN216122875U (en) | 2022-03-22 |
Family
ID=80721477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121503120.5U Active CN216122875U (en) | 2021-07-01 | 2021-07-01 | Miniature loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216122875U (en) |
-
2021
- 2021-07-01 CN CN202121503120.5U patent/CN216122875U/en active Active
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