CN212211378U

CN212211378U - Miniature loudspeaker

Info

Publication number: CN212211378U
Application number: CN202021053622.8U
Authority: CN
Inventors: 林嘉平; 董庆宾; 朱威; 罗欢英
Original assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Current assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-12-22
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses a micro loudspeaker, including the basin frame and accept the vibration system who is fixed in the basin frame, the vibration system includes first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil of range upon range of setting, four bights of first voice coil loudspeaker voice coil respectively with four bights one-to-one of second voice coil loudspeaker voice coil, first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil are equipped with two lead wires respectively, the lead wire is connected with the pad on the basin frame respectively, two bight positions on the first voice coil loudspeaker voice coil are equipped with the lead wire respectively, the second voice coil loudspeaker voice coil is equipped with the lead wire respectively with the bight position that the other two; the utility model provides a micro loudspeaker working property is stable, can detect whether there is positional deviation first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil through the potential difference of feedback between first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil to be convenient for technical staff carries out the position correction, so that vibration system vibrates more stably in the magnetic field, and then effectively improves the whole acoustic performance of speaker.

Description

Miniature loudspeaker

Technical Field

The utility model relates to an acoustics utensil technical field especially relates to a miniature speaker.

Background

At present, the micro loudspeaker and the receiver used by the mobile terminal are mostly moving coil loudspeakers;

the moving-coil speaker includes: a basin frame, a magnetic circuit system and a vibration system which are contained and fixed in the basin frame. The vibration system comprises a vibration diaphragm, a ball top and a voice coil; the voice coil is used as a moving part of the miniature sound production device, when alternating audio current passes through the voice coil, the voice coil generates a magnetic field which changes along with the audio current, the changing magnetic field and the magnetic field of a magnetic circuit system of the miniature electroacoustic device are attracted or repelled, so that the voice coil generates mechanical vibration to drive a vibrating diaphragm of the miniature electroacoustic device to vibrate, the vibrating diaphragm vibrates to push air repeatedly to produce sound, and the performance of the whole miniature electroacoustic device is influenced by the voice coil.

The traditional voice coil is usually formed in a single integral mode, ideally, the voice coil should repeatedly vibrate at a preset position, but in actual work, the voice coil is provided with two leads (namely an incoming wire and an outgoing wire), the incoming wire and the outgoing wire are arranged in a suspension mode and are electrically connected with a shell, and in the process of up-and-down vibration of the voice coil, the leads easily generate pulling force on a vibration system to cause a polarization phenomenon; the voice coil loudspeaker voice coil can deviate to predetermine the setting at the vibration in-process, leads to the magnetic field intensity through the voice coil loudspeaker voice coil to change after deviating preset position, and the skew of this kind of position is difficult to be monitored, can't correct promptly to lead to the voice coil loudspeaker voice coil to vibrate unstably, and then make the vibration also unstability of vibrating diaphragm.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a micro speaker with stable operation performance is provided.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a micro loudspeaker, includes the basin frame and accepts the vibration system who is fixed in the basin frame, vibration system is including first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil of range upon range of setting, four bights of first voice coil loudspeaker voice coil respectively with four bight one-to-ones of second voice coil loudspeaker voice coil, first voice coil loudspeaker voice coil with the second voice coil loudspeaker voice coil is equipped with two lead wires respectively, the lead wire respectively with pad on the basin frame is connected, two bight positions on the first voice coil loudspeaker voice coil are equipped with respectively the lead wire, the second voice coil loudspeaker voice coil with the bight position that two other bights of first voice coil loudspeaker voice coil correspond is equipped with respectively.

Furthermore, the basin frame is provided with a clearance area for avoiding the leads, and the leads are respectively positioned in the clearance area and arranged in a suspension manner.

Furthermore, an annular washer is further arranged on the basin frame, and a transition surface is arranged at the edge position of the annular washer, which is opposite to the lead.

Furthermore, the edge of the annular washer is provided with a chamfer to form the transition surface.

Further, the leads respectively comprise at least one bending section.

Further, the voice coil loudspeaker further comprises an auxiliary membrane structure which is respectively connected with the frame and the second voice coil, and the auxiliary membrane structure is arranged corresponding to the lead.

Further, the first voice coil and the second voice coil are conducted with each other.

Further, the first voice coil is connected with the second voice coil in a non-conducting manner.

Further, the bonding pads are respectively located at the corner positions of the frame and are respectively arranged close to the leads connected with the bonding pads.

Furthermore, two lead wires on the first voice coil are respectively arranged close to the long side or the short side of the first voice coil.

The beneficial effects of the utility model reside in that: the utility model provides a micro loudspeaker working property is stable, the accuracy of its position can be ensured effectively to the first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil of range upon range of setting, the lead wire can effectually alleviate the polarization of first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil, and can detect whether there is positional deviation first voice coil loudspeaker voice coil and second voice coil loudspeaker voice coil through the potential difference of feedback between first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil, thereby be convenient for technical staff carries out the position correction, so that vibration system vibrates more stably in magnetic field, and then effectively improve the whole acoustic performance of speaker.

Drawings

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

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

fig. 3 is a top view of a partial structure of a micro-speaker according to a first embodiment of the present invention;

fig. 4 is a schematic partial structure diagram of a micro-speaker according to another embodiment of the present invention.

Description of reference numerals:

1. a first voice coil; 2. a second voice coil; 21. a lead wire; 22. bending the section; 3. a basin stand; 31. a pad; 32. a void avoidance area; 33. a ring washer; 34. a transition surface; 4. a secondary membrane structure; 5. a magnetic circuit system; 6. vibrating diaphragm; 7. and (4) a ball top.

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 4, a micro speaker includes a frame 3 and a vibration system accommodated and fixed in the frame 3, the vibration system includes a first voice coil 1 and a second voice coil 2 stacked one on another, four corners of the first voice coil 1 respectively correspond to four corners of the second voice coil 2 one to one, the first voice coil 1 and the second voice coil 2 are respectively provided with two leads 21, the leads 21 are respectively connected with a bonding pad 31 on the frame 3, two corners of the first voice coil 1 are respectively provided with the leads 21, and corners of the second voice coil 2 corresponding to the other two corners of the first voice coil 1 are respectively provided with the leads 21.

From the above description, the beneficial effects of the present invention are: the accuracy of its position can be ensured effectively to first voice coil loudspeaker voice coil 1 and the second voice coil loudspeaker voice coil 2 of range upon range of setting, and lead wire 21 can effectually alleviate first voice coil loudspeaker voice coil 1 and the polarization of second voice coil loudspeaker voice coil 2 to can detect whether first voice coil loudspeaker voice coil 1 and second voice coil loudspeaker voice coil 2 have positional deviation through the potential difference of feeding back between first voice coil loudspeaker voice coil 1 and the second voice coil loudspeaker voice coil 2, thereby be convenient for technical staff carries out the position correction, so that vibration system vibrates more stably in magnetic field, and then effectively improve the whole acoustic performance of speaker.

Further, the basin stand 3 is provided with a clearance area 32 for clearance of the leads 21, and the leads 21 are respectively arranged in the clearance area 32 in a suspended manner.

As can be seen from the above description, the clearance area 32 facilitates clearance of the lead 21, ensures that the lead 21 does not interfere with the frame 3, and maximizes the amplitude output of the lead 21.

Further, an annular washer 33 is further arranged on the basin frame 3, and a transition surface 34 is arranged at the edge of the annular washer 33, which is opposite to the lead 21.

Further, the edge of the annular washer 33 is chamfered to form the transition surface 34.

It can be known from the above description that the transition surface 34 can effectively avoid the lead 21 from breaking due to stress concentration, and simultaneously can avoid some spaces for the lead 21 to a certain extent, so that the lead 21 is suspended in the air to the maximum extent, and the amplitude is favorably improved.

Further, the leads 21 each include at least one bent section 22.

As can be seen from the above description, the bending section 22 lengthens the suspended length of the lead 21, so as to facilitate the increase of the amplitude, and at the same time, the pulling force of the lead 21 on the vibration system can be effectively relieved, thereby facilitating the extension of the service life.

Further, the voice coil loudspeaker further comprises an auxiliary membrane structure 4 respectively connected with the frame 3 and the second voice coil 2, and the auxiliary membrane structure 4 is arranged corresponding to the lead 21.

As can be seen from the above description, the secondary membrane structure 4 can effectively suppress polarization of the first voice coil 1 and the second voice coil 2, which is beneficial to improving acoustic performance.

Further, the first voice coil 1 and the second voice coil 2 are conducted with each other.

Further, the first voice coil 1 is in non-conductive connection with the second voice coil 2.

As can be seen from the above description, the conduction relationship between the first voice coil 1 and the second voice coil 2 can be reasonably selected according to practical application requirements, which is beneficial to the improvement of the universality of the vibration system, specifically, under the condition that the first voice coil 1 and the second voice coil 2 are not conducted with each other, the first voice coil 1 plays a role in adjusting and supporting the position of the second voice coil 2 in the magnetic gap, and meanwhile, the two leads 21 of the first voice coil 1 play a role in symmetrical balance with the leads 21 of the second voice coil 2 in the pulling force of the vibration system; when the first voice coil 1 and the second voice coil 2 are conducted, in the vibration process, the positions of the first voice coil 1 and the second voice coil 2 in the magnetic field are different, so that the magnetic induction intensity passing through the first voice coil 1 and the second voice coil 2 is also different, and the induced electromotive force generated by the first voice coil 1 and the second voice coil 2 is also different, and the relative positions of the first voice coil 1 and the second voice coil 2 in the magnetic field, namely the vibration position of the whole voice coil assembly in the magnetic field, can be calculated in real time by detecting the voltage difference at the connection position of the first voice coil 1 and the second voice coil 2. If the voice coil assembly is deviated from the preset position in the vibration process, then the position of first voice coil 1 and second voice coil 2 all can change, the magnetic induction intensity that passes first voice coil 1 and second voice coil 2 also can change this moment, thereby the induced electromotive force that first voice coil 1 and second voice coil 2 produced also can change, namely the voltage difference of first voice coil 1 and second voice coil 2 junction changes, can obtain the holistic skew of voice coil assembly through the change that detects the voltage difference, thereby the mode of accessible external input offset current makes the voice coil assembly get back to preset position, realize the correction to voice coil assembly position, so that the vibration of voice coil assembly in magnetic field is more stable, thereby make the vibration of vibrating diaphragm 6 also more stable, effectively improve the whole acoustic performance of speaker.

Further, the pads 31 are respectively located at corner positions of the frame 3 and are respectively disposed near the leads 21 connected thereto.

Further, the two leads 21 on the first voice coil 1 are respectively disposed near the long side or the short side of the first voice coil 1.

As can be seen from the above description, the connection position of the lead 21 can be set reasonably according to the actual application requirements.

Example one

Referring to fig. 1 to 4, a first embodiment of the present invention is: a micro loudspeaker comprises a frame 3, a vibration system and a magnetic circuit system 5 which are accommodated and fixed in the frame 3, wherein the magnetic circuit system 5 comprises a magnetic bowl, the center of the magnetic bowl is provided with central magnetic steel, two groups of opposite sides of the magnetic bowl are respectively provided with side magnetic steel, a magnetic circuit gap is formed between the central magnetic steel and the side magnetic steel, the vibration system comprises a vibrating diaphragm 6, a ball top 7 and a voice coil assembly, the voice coil assembly comprises a first voice coil 1 and a second voice coil 2 which are stacked, four corners of the first voice coil 1 respectively correspond to four corners of the second voice coil 2 one by one, the first voice coil 1 and the second voice coil 2 are respectively provided with two leads 21, the leads 21 are respectively connected with a bonding pad 31 on the frame 3, two corners on the first voice coil 1 are respectively provided with the leads 21, and the corners of the second voice coil 2 corresponding to the other two corners of the first voice coil 1 are respectively provided with the leads 21, specifically, the bonding pad 31 is located respectively 3 bight positions of basin frame, and be close to respectively rather than being connected lead wire 21 sets up, lead wire 21 is followed respectively first voice coil loudspeaker voice coil 1 and second voice coil loudspeaker voice coil 2's bight is drawn forth to the bonding pad 31 department of 3 bight positions of basin frame and with bonding pad 31 is connected, wherein, first voice coil loudspeaker voice coil 1 with second voice coil loudspeaker voice coil 2 extremely lead wire 21 between the bonding pad 31 is unsettled to be set up, that is to say, lead wire 21 can not interfere with other parts at the vibration in-process, does benefit to the promotion of amplitude.

Optionally, the first voice coil 1 and the second voice coil 2 may be bonded by glue; or adopt the coiling of enameled wire material to form, because of the surface coating of enameled wire material has autohension lacquer, first voice coil loudspeaker voice coil 1 with autohension lacquer on the enameled wire material that second voice coil loudspeaker voice coil 2 accessible is close to bonds together.

Preferably, the basin frame 3 is provided with a clearance area 32 for avoiding the clearance of the lead 21, the lead 21 is respectively located in the clearance area 32 in a suspended manner, so that the lead 21 is easy to understand, the clearance area 32 is convenient for avoiding the clearance of the lead 21, the lead 21 is ensured not to interfere with the basin frame 3, and the amplitude output of the lead 21 can be maximized.

Preferably, still be equipped with annular china department 33 on the basin frame 3, annular china department 33 is just right the border position of lead wire 21 is equipped with transition face 34, and is concrete, lead wire 21 passes through annular china department 33 with pad 31 is connected, the chamfer formation is seted up at annular china department 33 edge transition face 34, from last down seeing, lead wire 21 is located transition face 34 top, easy understanding, transition face 34 can effectively avoid lead wire 21 stress concentration to lead to the fracture, and in-process vibrates from top to bottom at lead wire 21, transition face 34 can dodge out some spaces for lead wire 21 to make the unsettled of lead wire 21 maximize, do benefit to the promotion of amplitude.

Optionally, lead wire 21 includes at least one bending segment 22 respectively, that is to say, bending segment 22 can be a plurality of, and specific bending segment 22 quantity can rationally set up according to actual application demand, understands easily, bending segment 22 increases the unsettled length of lead wire 21, does benefit to the promotion of amplitude, simultaneously, can effectively alleviate lead wire 21 is to the pulling force of vibration system, does benefit to life's extension.

Please refer to fig. 1, in order to further ensure the working stability of the speaker, the vibration system further includes an auxiliary membrane structure 4 respectively connecting the frame 3 and the second voice coil 2, where the auxiliary membrane structure 4 is disposed corresponding to the lead 21, and it is easy to understand that the auxiliary membrane structure 4 can effectively suppress polarization of the first voice coil 1 and the second voice coil 2, which is beneficial to improving acoustic performance.

Optionally, the first voice coil 1 and the second voice coil 2 may be connected in series and may also be not connected, specifically, under the condition that the first voice coil 1 and the second voice coil 2 are not connected, the first voice coil 1 plays a role in adjusting and supporting the position of the second voice coil 2 in the magnetic circuit gap, and meanwhile, the two leads 21 of the first voice coil 1 play a role in symmetrical balance with the leads 21 of the second voice coil 2 in relation to the pulling force of the vibration system; when the first voice coil 1 and the second voice coil 2 are conducted, in the vibration process, the positions of the first voice coil 1 and the second voice coil 2 in the magnetic field are different, so that the magnetic induction intensity passing through the first voice coil 1 and the second voice coil 2 is also different, and the induced electromotive force generated by the first voice coil 1 and the second voice coil 2 is also different, and the relative positions of the first voice coil 1 and the second voice coil 2 in the magnetic field, namely the vibration position of the whole voice coil assembly in the magnetic field, can be calculated in real time by detecting the voltage difference at the connection position of the first voice coil 1 and the second voice coil 2. If the voice coil assembly is deviated from the preset position in the vibration process, then the position of first voice coil 1 and second voice coil 2 all can change, the magnetic induction intensity that passes first voice coil 1 and second voice coil 2 also can change this moment, thereby the induced electromotive force that first voice coil 1 and second voice coil 2 produced also can change, namely the voltage difference of first voice coil 1 and second voice coil 2 junction changes, can obtain the holistic skew of voice coil assembly through the change that detects the voltage difference, thereby the mode of accessible external input offset current makes the voice coil assembly get back to preset position, realize the correction to voice coil assembly position, so that the vibration of voice coil assembly in magnetic field is more stable, thereby make the vibration of vibrating diaphragm 6 also more stable, effectively improve the whole acoustic performance of speaker. Specifically, the conduction relation between the first voice coil 1 and the second voice coil 2 can be reasonably selected according to actual application requirements, so that the universality of the vibration system is promoted.

Optionally, two on the first voice coil 1 lead wire 21 is close to respectively the long limit or the minor face setting of first voice coil 1, it is corresponding, two on the second voice coil 2 lead wire 21 is close to respectively the long limit or the minor face setting of second voice coil 2, specifically, lead wire 21 on the first voice coil 1 with lead wire 21 on the second voice coil 2 is central symmetry axis setting.

Referring to fig. 2 and fig. 3, in this embodiment, the leads 21 are led out from positions of the first voice coil 1 and the second voice coil 2 near short sides, respectively, the transition surface 34 on the annular washer 33 is located on one side of the short sides of the first voice coil 1 and the second voice coil 2, and the leads 21 are led into the pad 31 from the transition surface 34 of the annular washer 33, respectively.

Referring to fig. 4, in another embodiment, the lead 21 may also be led out from the positions of the first voice coil 1 and the second voice coil 2 near the long sides.

To sum up, the utility model provides a miniature speaker working property is stable, acoustic performance is good, can effectively detect whether the voice coil loudspeaker voice coil takes place the polarization and can correct it.

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 utility model provides a micro loudspeaker, includes the basin frame and accepts the vibration system who is fixed in the basin frame, vibration system is including first voice coil loudspeaker voice coil and the second voice coil loudspeaker voice coil of range upon range of setting, four bights of first voice coil loudspeaker voice coil respectively with four bight one-to-ones of second voice coil loudspeaker voice coil, first voice coil loudspeaker voice coil with the second voice coil loudspeaker voice coil is equipped with two lead wires respectively, the lead wire respectively with pad on the basin frame is connected, a serial communication port, two bight positions on the first voice coil loudspeaker voice coil are equipped with respectively the lead wire, the second voice coil loudspeaker voice coil with the bight position that two other bights of first voice coil loudspeaker voice coil correspond is equipped with.

2. The micro-speaker as claimed in claim 1, wherein the frame is provided with a clearance area for clearance of the leads, and the leads are respectively suspended in the clearance area.

3. The micro-speaker according to claim 2, wherein the frame is further provided with an annular washer, and the edge of the annular washer facing the lead is provided with a transition surface.

4. The micro-speaker of claim 3, wherein the edge of the annular washer is chamfered to form the transition surface.

5. The micro-speaker of claim 1, wherein the leads each include at least one bend.

6. The micro-speaker of claim 1, further comprising a sub-diaphragm structure connecting the frame and the second voice coil, respectively, the sub-diaphragm structure being disposed corresponding to the lead lines.

7. The micro-speaker of claim 1, wherein the first voice coil is in communication with the second voice coil.

8. The microspeaker of claim 1 wherein the first voice coil is non-conductively coupled to the second voice coil.

9. The micro-speaker of claim 1, wherein the pads are located at respective corners of the frame and are respectively disposed adjacent to the leads connected thereto.

10. The micro-speaker of claim 1, wherein the two leads on the first voice coil are disposed near a long side or a short side of the first voice coil, respectively.