CN213586261U

CN213586261U - Three-magnetic-circuit large-amplitude micro loudspeaker

Info

Publication number: CN213586261U
Application number: CN202022410001.7U
Authority: CN
Inventors: 董庆宾; 王猛; 陈杰
Original assignee: Yiyang Xinwei Acoustic Technology Co Ltd
Current assignee: Yiyang Xinwei Acoustic Technology Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-06-29
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a three-magnetic circuit large amplitude micro loudspeaker, which comprises a voice coil and a ball top, wherein the voice coil comprises a body and a lead wire which are connected, a group of opposite sides of the ball top extend downwards to form a folded edge, one part of the lead wire is fixed at the bottom of the folded edge, the joint of the lead wire and the folded edge is positioned outside the middle point of a group of long sides of the body or outside the middle point of a group of short sides of the body, the three-magnetic circuit large amplitude micro loudspeaker provided by the utility model has strong structural stability and stable acoustic performance, the folded edge is arranged on a group of opposite sides of the ball top to lead the folded edge to be synchronous with the vibration of the body, one part of the lead wire is fixed on the folded edge, and the joint of the lead wire and the folded edge is positioned outside the middle point of a group of short sides of the body or outside the middle point of a group of long sides of the, the acoustic performance is improved.

Description

Three-magnetic-circuit large-amplitude micro loudspeaker

Technical Field

The utility model relates to an acoustics device field especially relates to a three magnetic circuit large amplitude micro loudspeaker.

Background

As a device capable of converting electric energy into acoustic energy, a speaker is widely used in microelectronic devices such as smart phones, camcorders, cameras, and notebook computers. With the increasing requirements of sound quality and loudness of microelectronic devices, the requirements of performance of micro-speakers are also increasing.

The prior scheme suitable for the large-amplitude loudspeaker mainly uses a centering disk part, and the centering disk needs higher process manufacturing flow and expensive materials, so the manufacturing process control difficulty is high, and the manufacturing cost is high.

Because of the size problem of the loudspeaker, the design of the centering disk is very thin and narrow, the thickness of the copper foil contained in the centering disk is usually 12 microns, and the design of the centering disk is provided with flaws or is not long enough, so that the centering disk is very easy to blacken and break to cause an open circuit.

The use of the flying lead solution can better improve the process stability and reduce the cost (without the need for a centering support piece part). The length of the suspended lead is a key factor for restricting the amplitude, and the small length of the lead can cause noise or fatigue disconnection. The larger the amplitude index of the speaker, the larger the length of the lead wire required to be suspended.

Use the big amplitude's of lead wire speaker scheme to design into three magnetism usually, make things convenient for the speaker lead wire unsettled and be qualified for the next round of competitions, just can have better antifatigue effect because sufficient unsettled length, for the validity that the volume that ensures the voice coil loudspeaker voice coil to be located the magnetic circuit clearance accounts for the ratio, generally can set up the turn-ups on the magnetism bowl, and the turn-ups then can occupy the unsettled space of lead wire, so, just contradict with the miniaturized development trend of speaker, therefore, in the three magnetic system that is equipped with the turn-ups, the turn-ups need be dodged to the lead wire, current lead wire is drawn forth from the voice coil loudspeaker voice coil four corners, cause the pulling force axle asymmetry easily.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a three-magnetic circuit large-amplitude micro-speaker with stable acoustic performance is provided.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a three magnetic circuit big amplitude micro loudspeaker, includes voice coil loudspeaker voice coil and dome, the voice coil loudspeaker voice coil includes body and the lead wire that links to each other, a set of opposite side downwardly extending of dome forms the hem, a part of lead wire is fixed in the hem bottom, the lead wire with the junction of hem is located the outside of the midpoint of a set of long limit of body or the outside of the midpoint of a set of minor face of body.

Further, still include basin frame and magnetic circuit subassembly, magnetic circuit subassembly is including connecting the magnetic bowl of basin frame, being located the central magnet steel of magnetic bowl central authorities and locating the limit magnet steel on a set of opposite side of magnetic bowl, another group of edge of magnetic bowl is equipped with the turn-ups that extends up, the turn-ups is located the turn-ups outside.

Furthermore, the basin frame is provided with a clearance area for avoiding the folded edge.

Furthermore, the body is provided with an inner concave structure corresponding to the position of the flanging, and the flanging is positioned in the inner concave structure.

Further, the folded edge is positioned in the concave structure.

Further, the folded edge is adhered to the side wall of the concave structure.

Further, a portion of the lead is located within the recessed structure.

Further, still include respectively with basin frame and the first auxiliary membrane of body bight connection.

Further, the basin stand further comprises a second auxiliary film connected with the basin stand and the folded edge respectively.

The beneficial effects of the utility model reside in that: the utility model provides a big amplitude micro loudspeaker structural stability of three magnetic circuits is strong, acoustic performance is stable, set up the hem on a set of opposite side of ball-top, make the hem synchronous with the vibration of body, some of lead wire is fixed in on the hem, and the lead wire lies in the outside of a set of minor face mid point of body or the outside of a set of long limit mid point with the junction of hem, at the vibration in-process, the voice coil loudspeaker voice coil can drop the pull force balance of lead wire to the body, make its atress more even, the risk that the voice coil loudspeaker voice coil polarization swayed has been reduced, do benefit to acoustic performance's promotion.

Drawings

Fig. 1 is an exploded view of a three-magnetic-circuit large-amplitude micro-speaker according to a first embodiment of the present invention;

fig. 2 is a schematic partial structural view of a three-magnetic-circuit large-amplitude micro speaker according to a first embodiment of the present invention;

fig. 3 is an exploded view of a three-magnetic-circuit large-amplitude micro-speaker according to a second embodiment of the present invention;

fig. 4 is a schematic partial cross-sectional structure view of a three-magnetic-circuit large-amplitude micro-speaker according to a second embodiment of the present invention;

fig. 5 is a schematic partial structural view of a three-magnetic-circuit large-amplitude micro-speaker according to an embodiment of the present invention.

Description of reference numerals:

1. a ball top; 11. folding edges; 2. a voice coil; 21. a body; 23. a concave structure; 22. a lead wire; 3. a basin stand; 31. a void avoidance area; 4. a first secondary film; 5. a magnetic bowl; 51. flanging; 6. central magnetic steel; 7. and edge magnetic steel.

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 5, a three-magnetic-circuit large-amplitude micro-speaker includes a voice coil 2 and a dome 1, the voice coil 2 includes a body 21 and a lead 22 connected to each other, a set of opposite sides of the dome 1 extend downward to form a folded edge 11, a portion of the lead 22 is fixed to the bottom of the folded edge 11, and a connection point of the lead 22 and the folded edge 11 is located outside a midpoint of a set of long sides of the body 21 or outside a midpoint of a set of short sides of the body 21.

The structure/working principle of the utility model is as follows: in the prior art, although the connection part of the lead 22 of the voice coil 2 and the body 21 of the partial suspension wire loudspeaker can be arranged at the middle point of the long side or the middle point of the short side of the body 21, the lead 22 can shake up and down in the working process of the loudspeaker, so that the lead 22 and the annular washer/side magnetic steel 7 are prevented from interfering, the three-magnetic-circuit loudspeaker can only realize the three-magnetic-circuit design (namely the side magnetic steel 7 and the washer are not arranged at the position where the lead 22 is led out), and the three-magnetic-circuit loudspeaker has the problem of short total length of the magnetic gap, so that the performance of the loudspeaker is poor; in addition, the length in magnetic gap is increased through setting up the yoke turn-ups to some suspension wire speakers, so, just need keep away the position to the yoke turn-ups, lead to the lead wire of its voice coil loudspeaker voice coil and the junction of body can only be located the bight of body, and the speaker is at the in-process of work, and the lead wire can be unbalanced to the power of dragging of body, leads to the body to sway, polarization, influences the promotion of speaker performance.

In the three-magnetic-circuit large-amplitude micro loudspeaker, a group of opposite sides of the dome 1 extend downwards to form the folded edge 11, so that the folded edge 11 is positioned outside the group of opposite sides of the body 21, and a fulcrum is provided for suspended leading-out of the lead 22; that is to say, the portion of the lead 22 led out from the body 21 to the position of the folded edge 11 plays a role in conducting, the connection position of the lead 22 and the body 21 can be set according to the actual application requirement, for example, under the condition that the folded edge 51 is provided, the connection point of the lead 22 and the body 21 can be set at the corner of the body 21, so as to avoid the position of the folded edge 51, because a part of the lead 22 is fixed on the folded edge 11, and the connection position of the lead 22 and the folded edge 11 is located outside the midpoint of a group of short sides of the body 21 or outside the midpoint of a group of long sides, an effective balancing effect is achieved on the vibration of the voice coil 2, therefore, even if the connection position of the lead 22 and the body 21 is set at the corner of the body 21, the polarization swing of the voice coil 2 cannot be caused, the limitation set at the connection position.

From the above description, the beneficial effects of the present invention are: set up hem 11 on a set of opposite side of dome 1, lead wire 22 partly is fixed in on hem 11 for hem 11 and body 21 vibration are synchronous, and lead wire 22 is located the outside of a set of minor face midpoint of body 21 or the outside of a set of long limit midpoint with hem 11's junction, and at the vibration in-process, voice coil loudspeaker voice coil 2 can drop lead wire 22 to the pulling force balance of body 21, makes its atress more even, has reduced the risk that 2 polarizations of voice coil loudspeaker voice coil sway, does benefit to the promotion of acoustic performance.

Further, still include basin frame 3 and magnetic circuit assembly, magnetic circuit assembly is including connecting the magnetic bowl 5 of basin frame 3, being located the central magnet steel 6 of magnetic bowl 5 central authorities and locating the limit magnet steel 7 on a set of opposite side of magnetic bowl 5, another group of pair edge of magnetic bowl 5 is equipped with turn-ups 51 that extends up, hem 11 is located the turn-ups 51 outside.

As can be seen from the above description, the turned-over edge 51 can increase the magnetic circuit performance of the three-magnetic-circuit large-amplitude micro-speaker, and is beneficial to improving the acoustic performance.

Further, a clearance area 31 for avoiding the folded edge 11 is formed on the basin frame 3.

As can be seen from the above description, the clearance area 31 can avoid the folded edge 11, so as to ensure the stability of the acoustic performance of the speaker.

Further, the body 21 is provided with an inner concave structure 23 at a position corresponding to the flange 51, and the flange 51 is located in the inner concave structure 23.

As can be seen from the above description, the flange 51 is disposed in the concave structure 23, and can provide a space for the lead 22, so as to facilitate lengthening of the suspended length of the lead 22 led out from the flange 11, and meet the development trend of large amplitude and miniaturization of the speaker.

Further, the folded edge 11 is located in the concave structure 23.

As can be seen from the above description, the folded edge 11 is accommodated in the concave structure 23, so as to provide space for the lead 22, which is beneficial to further lengthening the suspended length of the lead 22 led out from the folded edge 11, and thus, the development trend of large amplitude and miniaturization of the speaker is satisfied.

Further, the folded edge 11 is adhered to the side wall of the concave structure 23.

As can be seen from the above description, the folded edge 11 is adhered to the side wall of the concave structure 23, so that the folded edge 11 can be tightly connected with the main body 21, thereby enhancing the synchronization of the vibration of the folded edge 11 and the main body 21, and further enhancing the acoustic performance of the three-magnetic-circuit large-amplitude micro-speaker.

Further, a portion of the lead 22 is located within the concave structure 23.

As can be seen from the above description, disposing a part of the lead 22 in the concave structure 23 is beneficial to improving the compactness, satisfying the development trend of miniaturization, and reducing the wire consumption of the lead 22, which is beneficial to reducing the manufacturing cost.

Further, the flowerpot further comprises a first auxiliary membrane 4 which is respectively connected with the flowerpot frame 3 and the corner of the body 21.

As can be seen from the above description, the first secondary film 4 can support the body 21, so as to further reduce the risk of polarization of the voice coil 2, and facilitate improvement of structural stability.

Further, the flowerpot further comprises a second auxiliary film which is respectively connected with the flowerpot frame 3 and the folding edge 11.

As can be seen from the above description, the second auxiliary film can support the folded edge 11, so as to further reduce the risk of polarization of the voice coil 2, and facilitate improvement of structural stability.

Example one

Referring to fig. 1 and fig. 2, a first embodiment of the present invention is: a three-magnetic-circuit large-amplitude micro loudspeaker comprises a vibration assembly, a magnetic circuit assembly, a frame 3 and a voice coil 2, wherein the vibration assembly comprises a ball top 1 and a vibrating diaphragm arranged at the top of the ball top 1, the vibrating diaphragm is connected with the frame 3, and the voice coil 2 comprises a voice coil 2 lead 22 and a body 21 fixed at the bottom of the ball top 1; specifically, a pair of opposite sides of the dome 1 extend downward to form a folded edge 11, and a portion of the lead 22 is fixed to the bottom of the folded edge 11.

Optionally, the joint of the lead 22 and the folded edge 11 may be disposed outside the midpoint of a group of long sides of the body 21 according to the actual application requirement, or the joint of the lead 22 and the folded edge 11 may be disposed outside the midpoint of a group of short sides of the body 21; in this embodiment, the joint of the lead 22 and the folded edge 11 is located outside the midpoint of a group of short sides of the body 21, that is, the folded edge 11 is located outside a group of short sides of the body 21, and the magnetic circuit assembly can be arranged outside a group of long sides of the body 21, so that the maximization of the volume design of the magnetic circuit assembly is ensured, the improvement of the acoustic performance of the three-magnetic-circuit large-amplitude micro speaker is facilitated, and the development trend of large amplitude of the speaker is satisfied.

Preferably, the magnetic circuit assembly is including connecting the magnetic bowl 5 of basin frame 3, being located the central magnet steel 6 of magnetic bowl 5 central authorities and locating the limit magnet steel 7 on a set of opposite side of magnetic bowl 5, it is specific, limit magnet steel 7 is located the outside on a set of long limit of body 21, another group of opposite side of magnetic bowl 5 is equipped with the turn-ups 51 that extend up to the edge, hem 11 is located the turn-ups 51 outside, easy understanding, turn-ups 51 can increase the magnetic circuit performance of this three magnetic circuit large amplitude micro loudspeaker, does benefit to the promotion of acoustic performance.

Preferably, the basin frame 3 is provided with a clearance area 31 for avoiding the position of the folded edge 11, specifically, the basin frame 3 is further provided with an annular washer, the annular washer corresponds to the position of the lead 22 and is provided with a notch to form the clearance area 31, and the clearance area 31 can avoid the position of the folded edge 11, so that the stability of the acoustic performance of the loudspeaker is ensured.

Specifically in this embodiment, this three-magnetic-circuit large-amplitude micro speaker further includes respectively with basin frame 3 and the first pair of membranes 4 that body 21 bight is connected, and it is easy to understand, first pair of membranes 4 can be right body 21 plays the effect of supporting, has further reduced the polarized risk of voice coil loudspeaker voice coil 2, does benefit to structural stability's promotion, and optionally, this three-magnetic-circuit large-amplitude micro speaker still can set up respectively with basin frame 3 and the second pair of membranes (not shown in the figure) that hem 11 is connected, thereby it is right to hem 11 plays the effect of supporting, has further reduced the polarized risk of voice coil loudspeaker voice coil 2, does benefit to structural stability's promotion.

Example two

Referring to fig. 3 to 4, the second embodiment of the present invention is a further improvement of the body 21 of the voice coil 2 on the basis of the first embodiment, which is different from the first embodiment in that: in the large-amplitude micro speaker in the embodiment, the body 21 of the voice coil 2 is provided with the concave structure 23 at a position corresponding to the flange 51, and the flange 51 is located in the concave structure 23, which is easy to understand, the flange 51 is arranged in the concave structure 23, and can provide a space for the lead 22, so that the lead 22 can be lengthened in the suspended length of the part led out from the flange 11, and the development trend of large amplitude and miniaturization of the speaker is met. Furthermore, the folded edge 11 can be arranged in the concave structure 23, and it is easy to understand that the folded edge 11 is accommodated in the concave structure 23, so that the lead 22 can avoid a space, which is beneficial to further lengthening the suspension length of the lead 22 led out from the folded edge 11, and meets the development trend of large amplitude and miniaturization of the loudspeaker.

Specifically, the folded edge 11 is bonded to the side wall of the concave structure 23, so that the folded edge 11 can be tightly connected with the body 21, thereby enhancing the vibration synchronism of the folded edge 11 and the body 21, and further enhancing the acoustic performance of the three-magnetic-circuit large-amplitude micro-speaker.

More specifically, a part of the lead 22 is located in the concave structure 23, and the lead 22 is led out from the side wall of the concave structure 23 to the folded edge 11, so that the improvement of the structure compactness is facilitated, the development trend of miniaturization is met, the wire consumption of the lead 22 is reduced, and the reduction of the manufacturing cost is facilitated.

To sum up, the utility model provides a three magnetic circuit large amplitude micro loudspeaker's acoustic performance is stable, can effectively reduce the risk that the voice coil loudspeaker voice coil polarization swayd, has broken the restriction that lead wire and this body coupling department set up, has extended speaker structural design's dimension to do benefit to manufacturing cost's reduction.

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

1. The three-magnetic-circuit large-amplitude micro loudspeaker comprises a voice coil and a dome, wherein the voice coil comprises a body and a lead wire which are connected, and the three-magnetic-circuit large-amplitude micro loudspeaker is characterized in that a group of opposite sides of the dome extend downwards to form a folded edge, one part of the lead wire is fixed at the bottom of the folded edge, and the joint of the lead wire and the folded edge is positioned on the outer side of the midpoint of a group of long sides of the body or the outer side of the midpoint of a group of short sides of the body.

2. The micro-speaker with three magnetic circuits and large amplitude as claimed in claim 1, further comprising a frame and a magnetic circuit assembly, wherein the magnetic circuit assembly comprises a magnetic bowl connected to the frame, a central magnetic steel located in the center of the magnetic bowl, and a set of side magnetic steels located on opposite sides of the magnetic bowl, and the other set of sides of the magnetic bowl are provided with flanges extending upwards, and the flanges are located outside the flanges.

3. The micro-speaker with three magnetic circuits and large amplitude as claimed in claim 2, wherein the frame is provided with a clearance area for avoiding the folded edge.

4. The micro-speaker with three magnetic circuits and large amplitude as claimed in claim 2, wherein the body has an indent structure at a position corresponding to the flange, and the flange is located in the indent structure.

5. The triple magnetic circuit large amplitude micro-speaker of claim 4, wherein the folded edge is located within the recessed structure.

6. The triple-magnetic-circuit large-amplitude micro-speaker according to claim 5, wherein the folded edge is adhered to the side wall of the concave structure.

7. The triple-magnetic-circuit large-amplitude microspeaker of claim 4 wherein a portion of the lead wire is located within the recessed structure.

8. The triple-magnetic-circuit large-amplitude micro-speaker according to claim 2, further comprising a first sub-membrane connected to the frame and the body corner, respectively.

9. The triple magnetic circuit large amplitude micro-speaker of claim 2, further comprising a second sub-diaphragm connected to the frame and the flap, respectively.