CN218648959U - Miniature loudspeaker - Google Patents
Miniature loudspeaker Download PDFInfo
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- CN218648959U CN218648959U CN202220254322.9U CN202220254322U CN218648959U CN 218648959 U CN218648959 U CN 218648959U CN 202220254322 U CN202220254322 U CN 202220254322U CN 218648959 U CN218648959 U CN 218648959U
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Abstract
The utility model relates to an acoustics device technical field especially relates to a miniature speaker, be in including basin frame and range upon range of setting voice coil loudspeaker voice coil and dome in the basin frame, be equipped with vice membrane on the inside wall of basin frame, vice epimembranal pair intramembranous internal fixation portion that is equipped with interconnect with be curved book ring portion, be equipped with the dome straight flange on the dome, the dome straight flange with vice intraformational fixation portion bonds mutually. The secondary membrane is curved book ring portion through the setting and provides the deformation volume for the vibration, and the arc structure of book ring portion can also reduce the shared area of secondary membrane between basin frame and voice coil loudspeaker voice coil under the required deformation volume requirement of improvement vibration system, guarantees to have sufficient space between ball top and the secondary membrane and is used for improving the magnetic gap of voice coil loudspeaker voice coil, improves the symmetry of BL curve flatness and vibration system vibration, reduces harmonic distortion.
Description
Technical Field
The utility model relates to an acoustics device technical field especially relates to a miniature speaker.
Background
As a device capable of converting electric energy into acoustic energy, a micro speaker is widely used in microelectronic devices such as smart phones, camcorders, cameras, and notebook computers. With the increasing lightness and thinness of microelectronic devices and the increasing requirements on tone quality and loudness, the requirements on the height of micro speakers are also increasing, and the requirements on amplitude are also increasing. In the prior art, the polarization of the voice coil is inhibited by adding the auxiliary membrane, so that the amplitude is improved. However, the amplitude needs to be increased to further increase the width of the secondary film fixed on the voice coil, which may result in occupying the straight edge position of the side magnetic steel or the magnetic cover, and thus a complete magnetic loop cannot be formed, resulting in a decrease in performance sensitivity.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the present invention provides a micro speaker capable of improving vibration amplitude.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a micro loudspeaker, is in including basin frame and range upon range of setting voice coil loudspeaker voice coil and dome in the basin frame, be equipped with vice membrane on the inside wall of basin frame, vice epimembranal fixed part that is equipped with interconnect in vice membrane with be curved book ring portion, be equipped with the dome straight flange on the dome, the dome straight flange with vice epimembranal fixed part bonds mutually.
Furthermore, the ball top is provided with a convex part corresponding to the position of the voice coil, wherein the convex part is matched with the outer contour of the voice coil, and the convex part is arranged towards the direction of the voice coil.
Furthermore, one end of the straight edge of the top dome, which is far away from the top dome, is provided with a top dome outer fixing part, and the top dome outer fixing part is bonded with the inner fixing part of the auxiliary membrane.
Further, the straight edge of the top dome is perpendicular to the outer fixing part of the top dome.
Furthermore, the top dome outer fixing part is arranged by extending the free end of the straight edge of the top dome towards the inner side wall of the basin stand.
Furthermore, the dome outer fixing portion is arranged by extending the free end of the straight edge of the dome towards the voice coil.
Furthermore, a gap is formed between the voice coil and the straight edge of the top dome, an external magnet steel and an external washer which are arranged in a stacked mode are arranged in the basin frame, and the external magnet steel and the external washer are located in the gap.
Furthermore, the outer magnet steel is not in contact with the voice coil and the straight edge of the ball top, and the outer washer is not in contact with the voice coil and the straight edge of the ball top.
Furthermore, a gap is formed between the voice coil and the straight edge of the dome, a magnetic cover is arranged in the basin frame, the magnetic cover is provided with a magnetic cover straight edge, and the magnetic cover straight edge is located in the gap.
Furthermore, the straight edge of the magnetic cover is not contacted with the straight edge of the voice coil and the ball top.
The beneficial effects of the utility model reside in that: the utility model provides a micro loudspeaker, through setting up the dome straight flange and the interior fixed part of auxiliary membrane is bonded mutually, the auxiliary membrane is curved book ring portion through the setting and provides the deformation volume for the vibration, and the arc structure of book ring portion can also reduce the shared area of auxiliary membrane between basin frame and voice coil loudspeaker voice coil under the deformation volume requirement that improves the required vibration system, guarantees to have sufficient space between dome and the auxiliary membrane and is used for improving the magnetic gap of voice coil loudspeaker voice coil, improves the symmetry of BL curve flatness degree and vibration system vibration, reduces harmonic distortion.
Drawings
Fig. 1 is an exploded view of a micro-speaker according to the present invention;
fig. 2 is a schematic structural diagram of an auxiliary membrane of a micro-speaker according to the present invention;
fig. 3 is a schematic structural diagram of a dome of a micro speaker according to the present invention;
fig. 4 is a top view of a micro-speaker according to the present invention;
fig. 5 is a bottom view of a micro-speaker according to the present invention;
fig. 6 is a cross-sectional view of a micro-speaker according to the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 6;
fig. 8 is a partially enlarged view of a first embodiment of a micro-speaker according to the present invention;
fig. 9 is a partially enlarged view of a second embodiment of a micro-speaker according to the present invention;
fig. 10 is a partially enlarged view of a third embodiment of a micro-speaker according to the present invention;
description of the reference symbols:
1. a basin stand; 2. vibrating diaphragm; 3. a ball top; 31. straight edges of the ball tops; 32. a convex portion; 33. an outer dome fixing portion; 4. a voice coil; 5. a magnetic circuit component; 51. a magnetic shield; 52. a central magnetic steel; 53. a central washer; 54. external magnetic steel; 55. a washer; 511. straight edges of the magnetic shield; 6. a secondary membrane; 61. a secondary membrane inner fixing part; 62. a folded ring part; 63. and a secondary membrane outer fixing part.
Detailed Description
In order to explain the technical content, the objects and the 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 10, the present invention provides a micro speaker, including a frame, a voice coil and a dome stacked in the frame, wherein an auxiliary film is disposed on the inner sidewall of the frame, the auxiliary film is provided with an auxiliary film inner fixing portion and an arc-shaped folding ring portion, the dome is provided with a dome straight edge, and the dome straight edge is bonded with the auxiliary film inner fixing portion.
From the above description, the beneficial effects of the present invention are: the utility model provides a micro loudspeaker, through setting up the dome straight flange and the interior fixed part of auxiliary membrane is bonded mutually, the auxiliary membrane is curved book ring portion through the setting and provides the deformation volume for the vibration, and the arc structure of book ring portion can also reduce the shared area of auxiliary membrane between basin frame and voice coil loudspeaker voice coil under the deformation volume requirement that improves the required vibration system, guarantees to have sufficient space between dome and the auxiliary membrane and is used for improving the magnetic gap of voice coil loudspeaker voice coil, improves the symmetry of BL curve flatness degree and vibration system vibration, reduces harmonic distortion.
Furthermore, the ball top is provided with a convex part corresponding to the position of the voice coil, wherein the convex part is matched with the outer contour of the voice coil, and the convex part is arranged towards the direction of the voice coil.
From the above description, the dome-shaped convex part can adjust the Z-axis position of the voice coil in the magnetic gap formed by the dome and the secondary film by adjusting the height of the convex part.
Furthermore, one end of the straight edge of the top dome, which is far away from the top dome, is provided with a top dome outer fixing part, and the top dome outer fixing part is bonded with the inner fixing part of the auxiliary membrane.
From the above description, the straight edge of the dome can effectively increase the bonding area between the dome and the inner fixing part of the secondary membrane by arranging the outer fixing part of the dome to be bonded with the inner fixing part of the secondary membrane, so that the bonding force with the secondary membrane is increased, and the fixing strength is enhanced.
Furthermore, the straight edge of the top dome is perpendicular to the external fixed part of the top dome.
From the above description, it can be seen that the perpendicular of the straight edge of the dome to the external fixing portion of the dome can increase the strength of the dome and reduce the risk of cracking and separation of the bottom of the straight edge of the dome. Furthermore, the top dome outer fixing part is arranged by extending the free end of the straight edge of the top dome towards the inner side wall of the basin stand.
Furthermore, the dome outer fixing portion extends from the free end of the straight edge of the dome to the voice coil.
Furthermore, a gap is formed between the voice coil and the straight edge of the top dome, an external magnet steel and an external washer which are arranged in a stacked mode are arranged in the basin frame, and the external magnet steel and the external washer are located in the gap.
From the above description, it can be known that there is a gap between the voice coil and the straight edge of the dome, and a complete magnetic loop can be formed by disposing the external magnet and the external washer in the gap, thereby avoiding the reduction of performance sensitivity.
Furthermore, the outer magnet steel is not in contact with the straight edge of the ball top and the voice coil, and the outer washer is not in contact with the straight edge of the ball top and the voice coil.
From the above description, it can be known that the external magnet steel and the external washer are not in contact with the voice coil and the straight edge of the dome, so that the voice coil can be prevented from rubbing the external magnet steel and the external washer in the vibration process, and the loudspeaker can be prevented from generating noise. Meanwhile, as the outer magnet and the outer washer are hard, if the voice coil rubs against the outer magnet and the outer washer, the voice coil is damaged and disconnected from the power connection end.
Furthermore, a gap is formed between the voice coil and the straight edge of the dome, a magnetic cover is arranged in the basin frame, the magnetic cover is provided with a magnetic cover straight edge, and the magnetic cover straight edge is located in the gap.
As can be seen from the above description, a gap is formed between the voice coil and the straight edge of the dome, and by providing the straight edge of the magnetic cover on the magnetic cover and locating the straight edge of the magnetic cover in the gap, a complete magnetic circuit can be formed, thereby avoiding a decrease in performance sensitivity. Meanwhile, the straight edge of the magnetic cover can be additionally arranged through the gap, the magnetic field intensity is improved, and the amplitude of the voice coil is further improved.
Furthermore, the straight edge of the magnetic cover is not contacted with the straight edge of the voice coil and the ball top.
From the above description, it can be known that the straight edge of the magnetic cover is not in contact with the straight edge of the dome of the voice coil, so that the voice coil can be prevented from rubbing the straight edge of the magnetic cover in the vibration process, and noise of the loudspeaker can be prevented. Meanwhile, because the straight edge of the magnetic cover is hard, if the voice coil rubs against the straight edge of the magnetic cover, the voice coil can be damaged and disconnected from the electric connection end.
Application scenarios
A micro speaker is provided, which is widely applied to micro electronic devices such as smart phones, camcorders, cameras, notebook computers and the like.
Referring to fig. 1 to 8, a first embodiment of the present invention is: the micro loudspeaker comprises a frame 1, and a vibrating diaphragm 2, a dome 3, a voice coil 4 and a magnetic circuit assembly 5 which are sequentially stacked in the frame from top to bottom. The relative both sides of voice coil loudspeaker voice coil are equipped with vice membrane 6 respectively, vice membrane is including the interior fixed part 61 of vice membrane of interconnect in proper order, fold ring portion 62 and the outer fixed part 63 of vice membrane, just the outer fixed part of vice membrane with the inside wall of basin frame is connected. The dome top is provided with a dome top straight edge 31 which vertically extends downwards relative to the dome top, and the dome top straight edge is bonded with the fixed part in the auxiliary membrane. The ring folding part of the auxiliary membrane is arc-shaped, and the arc concave surface corresponding to the ring folding part is arranged upwards. And a convex part 32 matched with the outer contour of the voice coil is arranged at the position of the ball top corresponding to the voice coil, and the convex part protrudes downwards and is contacted with the voice coil. The Z-axis position of the voice coil in the magnetic gap can be adjusted by adjusting the height of the convex part, so that the flatness degree of a BL curve of the micro-speaker and the symmetry of vibration of a vibration system can be improved, and harmonic distortion is reduced.
In this embodiment, the end of the top straight edge far from the top has a top outer fixing portion 33, specifically, the top straight edge is perpendicular to the top outer fixing portion, and the top outer fixing portion extends from the free end of the top straight edge toward the inner side wall of the basin stand.
In this embodiment, the magnetic circuit assembly includes a magnetic cover 51, and a central magnetic steel 52 and a central washer 53 that are sequentially stacked from bottom to top at a central position of the magnetic cover. The voice coil is matched with the central magnetic steel and the central washer in size, and the voice coil is arranged concentrically with the central magnetic steel and the central washer. A gap is formed between the voice coil and the straight edge of the spherical top, the edge of the magnetic cover is provided with a magnetic cover straight edge 511 which is oppositely arranged and vertically extends upwards, the magnetic cover straight edge is positioned in the gap, and the magnetic cover straight edge is not contacted with the voice coil and the straight edge of the spherical top.
In this embodiment, an end of the dome, which is far away from the straight edge of the dome, is a frame in a clip structure, and the diaphragm is bonded to the frame of the dome.
Referring to fig. 9, a second embodiment of the present invention is:
the difference from the first embodiment is that the structure of the magnetic circuit assembly is further improved, specifically:
the magnetic circuit assembly further comprises an outer magnet 54 and an outer washer 55 which are arranged on the periphery of the central magnet steel and the central washer in a surrounding mode, the outer magnet and the outer washer are arranged at the edge of the magnetic cover in a laminated mode, and the outer magnet and the outer washer are located in the gap.
Referring to fig. 10, a third embodiment of the present invention is:
the difference from the first embodiment is that the structure of the straight edge of the dome is further improved, specifically:
the voice coil is arranged on the outer side of the dome, and the free end of the dome straight edge is connected with the voice coil.
The working principle is as follows:
when the magnetic circuit component works, the magnetic circuit component is electrified to form a complete magnetic loop, the voice coil moves between a magnetic gap formed by the vibrating diaphragm and the ball top and drives the vibrating diaphragm and the secondary diaphragm on the bonding part of the ball top to deform, and the bending part of the secondary diaphragm provides deformation for vibration in the vertical direction. Meanwhile, the convex part of the spherical top and the voice coil adjust the Z-axis position of the voice coil in the magnetic gap by changing the height of the convex part, so that the flatness degree of a BL curve of the micro-speaker and the symmetry of vibration of a vibration system can be improved, and harmonic distortion is reduced.
To sum up, the utility model provides a pair of miniature speaker bonds through setting up the internal fixation portion of dome straight flange and vice membrane to can reduce the voice coil loudspeaker voice coil volume, improve the clearance between voice coil loudspeaker voice coil and the vice membrane. Simultaneously, the secondary membrane is curved book ring portion through setting up and provides the deformation volume for the vibration, and the arc structure of book ring portion can also reduce the secondary membrane shared area between basin frame and voice coil loudspeaker voice coil under improving the required deformation volume requirement of vibration system, guarantees to have sufficient space between ball top and the secondary membrane and is used for improving the magnetic gap of voice coil loudspeaker voice coil, improves BL curve flatness and the symmetry of vibration system vibration, reduces harmonic distortion.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a micro loudspeaker, is in including basin frame and range upon range of setting voice coil loudspeaker voice coil and dome in the basin frame, be equipped with vice membrane on the inside wall of basin frame, its characterized in that, be equipped with interconnect's vice intraductal fixed part and be curved book ring portion on the vice membrane, be equipped with the dome straight flange on the dome, the dome straight flange with vice intraductal fixed part bonds mutually.
2. The micro-speaker of claim 1, wherein a protrusion adapted to an outer profile of the voice coil is disposed at a position of the dome corresponding to the voice coil, and the protrusion is disposed toward the voice coil.
3. The micro-speaker as claimed in claim 1, wherein the end of the straight edge of the dome away from the dome has a dome outer fixing portion, and the dome outer fixing portion is adhered to the sub-membrane inner fixing portion.
4. The micro-speaker as claimed in claim 3, wherein the straight edge of the dome is perpendicular to the external fixing portion of the dome.
5. The micro-speaker as claimed in claim 4, wherein the dome outer fixing portion is extended from a free end of the straight edge of the dome toward the inner sidewall of the frame.
6. The micro-speaker as claimed in claim 4, wherein the dome outer fixing portion is extended from a free end of the straight side of the dome toward the voice coil.
7. The micro-speaker according to claim 1, wherein a gap is formed between the voice coil and the straight edge of the dome, an external magnet and an external washer are arranged in the frame in a stacked manner, and both the external magnet and the external washer are located in the gap.
8. The micro-speaker of claim 7, wherein none of the outer magnets is in contact with the voice coil and the dome straight edge, and none of the outer washers is in contact with the voice coil and the dome straight edge.
9. The micro-speaker of claim 1, wherein a gap is provided between the voice coil and the dome straight edge, and a magnetic shield is provided in the frame, the magnetic shield having a magnetic shield straight edge, the magnetic shield straight edge being located in the gap.
10. The micro-speaker of claim 9, wherein none of the straight sides of the magnetic shield contacts the straight sides of the voice coil and the dome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220254322.9U CN218648959U (en) | 2022-02-08 | 2022-02-08 | Miniature loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220254322.9U CN218648959U (en) | 2022-02-08 | 2022-02-08 | Miniature loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218648959U true CN218648959U (en) | 2023-03-17 |
Family
ID=85488491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220254322.9U Active CN218648959U (en) | 2022-02-08 | 2022-02-08 | Miniature loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218648959U (en) |
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2022
- 2022-02-08 CN CN202220254322.9U patent/CN218648959U/en active Active
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