CN216291422U

CN216291422U - Miniature loudspeaker

Info

Publication number: CN216291422U
Application number: CN202121488626.3U
Authority: CN
Inventors: 张俊利; 林嘉平; 李铖
Original assignee: Yiyang Xinwei Acoustic Technology Co Ltd
Current assignee: Yiyang Xinwei Acoustic Technology Co Ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-04-12
Anticipated expiration: 2031-07-01

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 component comprises a sound film and a dome, the sound film comprises an inner fixing part, a folded ring part and an outer fixing part, the inner fixing part, the folded ring part and the outer fixing part are sequentially connected from inside to outside, the inner fixing part is in a ring frame shape, 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, the vibration component further comprises an annular framework, the bottom of the annular framework is connected with the inner fixing part, and the top of the annular framework is connected with the dome to form a containing part capable of containing the top of the second central magnetic steel. The top surface of the central washer is additionally provided with the central magnetic steel, the annular framework is additionally arranged on the sound film to elevate the dome, and then an accommodating part capable of accommodating the additionally arranged central magnetic steel is formed, so that the overall sensitivity of the micro-speaker is improved and the hearing of a user is optimized on the premise of ensuring the large amplitude of the micro-speaker.

Description

Miniature loudspeaker

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 subassembly includes sound membrane and dome, the sound membrane includes the outer fixed part of interior fixed part, the ring portion of rolling over and connection basin frame that link to each other in proper order from inside to outside, interior fixed part is ring frame form, the top surface of center china department be equipped with first center magnet steel opposite in polarity's second center magnet steel still includes cyclic annular skeleton, the bottom of cyclic annular skeleton is connected interior fixed part, the top of cyclic annular skeleton with the dome is connected and is formed and to be acceptd the portion of acceping at the top of second center magnet steel.

Further, the outer peripheral wall of the dome is aligned with the outer peripheral wall of the annular skeleton.

Further, the dome edge is disposed to protrude with respect to the outer peripheral wall of the annular frame.

Further, the annular framework is formed by winding a cable.

Furthermore, the annular framework is made of aluminum.

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, 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 central magnet steel and increases cyclic annular skeleton in order to set up the dome on the sound membrane, and then forms the portion of acceping the central magnet steel who adds, 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;

91. a ball top; 92. a voice coil;

10. a cyclic skeleton.

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 subassembly includes sound membrane 8 and dome 91, sound membrane 8 includes consecutive interior fixed part 81, ring portion 82 and the outer fixed part 83 of connecting basin frame 1 from inside to outside, interior fixed part 81 is the ring frame form, center china 6's top surface be equipped with first center magnet steel 3 opposite polarity's second center magnet steel 7 still includes annular skeleton 10, the bottom of annular skeleton 10 is connected interior fixed part 81, the top of annular skeleton 10 with dome 91 connects the formation and can accepts the portion of acceping at second center magnet steel 7's top.

From the above description, the beneficial effects of the present invention are: the top surface of center china department 6 adds center magnet steel and increases annular skeleton 10 on sound membrane 8 in order to erect dome 91, and then forms the portion of acceping the center magnet steel who adds, under the prerequisite of guaranteeing that miniature speaker can realize big amplitude, promotes miniature speaker's magnetic flux effectively to improve miniature speaker's whole sensitivity, improved miniature speaker's BL performance parameter, reach and promote miniature speaker product property ability, optimize the purpose that the user listened the sense.

Further, the outer peripheral wall of the dome 91 is aligned with the outer peripheral wall of the annular frame 10.

As can be seen from the above description, the outer peripheral wall of the dome 91 is aligned with the outer peripheral wall of the annular frame 10, so that the production material consumption of the dome 91 can be reduced, and the material cost of the micro-speaker can be saved.

Further, the edge of the dome 91 is protruded with respect to the outer peripheral wall of the ring frame 10.

As can be seen from the above description, the edge of the dome 91 protrudes relative to the outer peripheral wall of the annular frame 10, so that the requirement for the mounting accuracy of the dome 91 can be reduced, the assembly efficiency of the micro-speaker can be improved, and the assembly cost of the micro-speaker can be saved.

Further, the ring-shaped bobbin 10 is wound by a cable.

As can be seen from the above description, the height and thickness of the ring frame 10 are easily adjusted, and the weight is light.

Further, the material of the annular frame 10 is aluminum.

As can be seen from the above description, the annular frame 10 is easy to manufacture and lightweight.

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 92 connected with the voice diaphragm 8, and the magnetic bowl 2 is provided with a position avoiding groove 21 corresponding to the voice coil 92.

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 91, a voice coil 92 and an annular framework 10, wherein the annular framework 10 is connected with the sound film 8 and the dome 91, the top of the voice coil 92 is connected with the sound film 8, the bottom of the voice coil 92 extends into the magnetic gap, and the top of the annular framework 10 is connected with the dome 91 to form a containing part capable of containing the top of the second center magnetic steel 7.

In detail, the sound 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 bottom of the ring-shaped frame 10 is connected to the top surface of the inner fixing portion 81, the bottom surface of the inner fixing portion 81 is connected to the voice coil 92, and the outer fixing portion 83 is connected to the basin frame 1.

In this embodiment, the outer peripheral wall of the dome 91 is aligned with the outer peripheral wall of the annular frame 10, that is, when the micro-speaker is viewed from above, the outer peripheral wall of the dome 91 overlaps with the outer peripheral wall of the annular frame 10. Optionally, the annular bobbin 10 is formed by winding a cable, that is, in this embodiment, the annular bobbin 10 is a voice coil 92 bobbin, and it is easy to understand that the voice coil 92 bobbin is not powered.

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 92, 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.

In this embodiment, the edge of the dome 91 is protruded from the outer peripheral wall of the annular frame 10, that is, when the micro-speaker is viewed from above, only the outer peripheral wall of the dome 91 is visible, but the outer peripheral wall of the annular frame 10 is not visible. Optionally, the material of the annular frame 10 is aluminum, and in other embodiments, the material of the annular frame 10 may also be other materials, such as aluminum alloy, copper alloy, and the like.

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, the annular framework is additionally arranged on the sound film to elevate the dome, so that the accommodating part capable of accommodating the additionally arranged central magnetic steel is formed, and on the premise that the micro-speaker can realize large amplitude, the magnetic flux of the micro-speaker is effectively improved, so that the overall sensitivity of the micro-speaker is improved, the BL performance parameters of the micro-speaker are improved, 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

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 sound membrane and dome, the sound membrane includes from inside to outside consecutive inner fixed part, ring portion and the outer fixed part of connecting the basin frame, inner fixed part is ring frame form, its characterized in that: the top surface of center washer be equipped with first center magnet steel opposite polarity's second center magnet steel, still include annular skeleton, the bottom of annular skeleton is connected interior fixed part, the top of annular skeleton with the ball top is connected and is formed the portion of acceping the top of second center magnet steel.

2. The micro-speaker of claim 1, wherein: the outer peripheral wall of the ball top is aligned with the outer peripheral wall of the annular framework.

3. The micro-speaker of claim 1, wherein: the ball top edge is arranged in a protruding mode relative to the outer peripheral wall of the annular framework.

4. The micro-speaker of claim 1, wherein: the annular framework is formed by winding cables.

5. The micro-speaker of claim 1, wherein: the annular framework is made of aluminum.

6. The micro-speaker of claim 1, 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 1, 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, and a position avoiding groove corresponding to the voice coil is formed in the magnetic bowl.