CN220401958U - Sound production unit, loudspeaker and electronic equipment - Google Patents

Abstract

The utility model discloses a sound generating unit, a loudspeaker and electronic equipment, wherein the sound generating unit comprises a plurality of voice coils; the voice coils are sequentially arranged along the horizontal direction, adjacent voice coils are contacted with each other, and the current directions of the adjacent voice coils at the contact positions are opposite; each voice coil is provided with corresponding magnetic steel, and the polarities of the corresponding magnetic steels of the adjacent voice coils are opposite; the voice coils are electrically connected in turn and are provided with two output leads; the stress direction of each voice coil is the same, the stress consistency of a plurality of voice coils is guaranteed, the adjacent voice coils are in contact with each other, the space is fully utilized, meanwhile, the voice coils are split, compared with the existing single-voice-coil setting mode, the stress of the voice coils is effectively improved, and the plurality of voice coils are used as a whole for only two output leads, so that the sensitivity of the sounding unit is greatly improved, and the loudness of the sounding unit is increased.

Description

Sound production unit, loudspeaker and electronic equipment

Technical Field

The present utility model relates to the field of sound generating devices, and in particular, to a sound generating unit, a speaker, and an electronic device.

Background

The sound generating unit is used as a common electroacoustic transducer for converting electric energy into acoustic energy, and plays an indispensable role in a sound emitting system.

With the wide application of consumer electronic products such as mobile phones and tablet computers, especially large-scale wearable electronic devices such as AR/VR, higher requirements are put on the appearance of the electronic devices for being light and thin and performance. Sound emitting units are also increasing demands in terms of their performance, size etc. as an important component of such products.

However, the sound unit is light and thin, which reduces the volume of the magnetic circuit assembly and the height of the voice coil of the micro speaker, so that the B value and the voice coil L are reduced, resulting in reduced sensitivity and loudness of the sound unit.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: provided are a sound emitting unit, a speaker, and an electronic device, which can improve the sensitivity of the sound emitting unit.

In order to solve the technical problems, the utility model adopts a technical scheme that:

a sound generating unit includes a plurality of voice coils;

the voice coils are sequentially arranged along the horizontal direction, adjacent voice coils are contacted with each other, and the current directions of the adjacent voice coils at the contact positions are opposite;

each voice coil is provided with corresponding magnetic steel, and the polarities of the corresponding magnetic steels of the adjacent voice coils are opposite;

the plurality of voice coils are electrically connected in sequence and have two output leads.

Further, the two output leads are centrosymmetric with respect to a center point of the plurality of voice coils.

Further, the plurality of voice coils are connected in parallel or in series.

Further, the device also comprises a centering support piece;

the plurality of voice coils are connected in parallel or in series through the centering support.

Further, the centering support has a bonding pad adapted to each of the voice coils;

each voice coil corresponds to two bonding pads;

each of the voice coils is connected in parallel or in series with the other voice coils through the corresponding two of the bonding pads.

Further, the centering support pieces are symmetrically arranged.

Further, the centering support piece is integrally formed or split into a plurality of groups based on the bonding pad.

Further, the magnetic steel comprises a central magnetic steel;

the central magnetic steel corresponding to each voice coil is arranged on the inner side of the voice coil;

the polarities of the central magnetic steels corresponding to the adjacent voice coils are opposite.

Further, the magnetic steel also comprises edge magnetic steel;

the side magnetic steel corresponding to each voice coil is arranged around the outer side of the voice coil;

the polarities of the side magnetic steel and the center magnetic steel corresponding to each voice coil are opposite.

Further, the number of the voice coils is 2.

Further, the basin stand is also included;

the voice coils are arranged in the basin frame and are sequentially arranged along the short axis direction of the basin frame.

In order to solve the technical problems, the utility model adopts another technical scheme that:

a loudspeaker comprises the sounding unit.

In order to solve the technical problems, the utility model adopts another technical scheme that:

an electronic device comprises the loudspeaker.

The utility model has the beneficial effects that: the voice coils are split into a plurality of voice coils, the voice coils are sequentially arranged along the horizontal direction, the adjacent voice coils are contacted with each other, the current directions of the adjacent voice coils at the contact positions are opposite, the polarities of the magnetic steels corresponding to the adjacent voice coils are opposite, based on the left hand rule, the stress directions of each voice coil are the same, the stress consistency of the voice coils is ensured, the adjacent voice coils are contacted and arranged, the space is fully utilized, the B value and the maximization of the voice coil L can be realized in the limited space, meanwhile, compared with the existing single-voice coil arrangement mode, the split voice coil has the advantages that the utilization rate of the magnetic steel is improved through the split of the middle area of the magnetic steel, and on the other hand, the perimeter of the voice coils is longer than that of the single-voice coil under the same voice coil length, accordingly, the thickness of the voice coil is reduced, so that the distance between the adjacent magnetic steels (the edge magnetic steel and the center magnetic steel) is reduced, namely, the magnetic gap is reduced, and the magnetic attraction force is increased, so that the stress of the voice coil is improved, and the voice coil is provided with only two output leads as a whole, compared with n voice coils with 2n output leads, the number of the output leads is reduced, the convenience of circuit connection is improved, the assembly simplicity of the whole machine is improved, the complexity of circuit connection is not caused by the introduction of a multi-voice coil structure, and the sensitivity of the voice coil to external stress is effectively improved due to comprehensive consideration of the mechanical structure design, the circuit structure design, the stress design and the like, so that the sensitivity of the voice coil unit is greatly improved, and the loudness of the voice unit is increased.

Drawings

FIG. 1 is a top view of a sound unit according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the A-A plane in FIG. 1;

FIG. 3 is an enlarged schematic diagram I of FIG. 2B;

FIG. 4 is an enlarged schematic diagram II of FIG. 2B;

FIG. 5 is a schematic diagram of a dual voice coil structure according to an embodiment of the present utility model;

FIG. 6 is a schematic structural view of a centering support according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a centering support according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a dual voice coil and centering pad connection structure according to an embodiment of the present utility model;

FIG. 9 is a schematic structural view of an integrally formed centering strut according to an embodiment of the present utility model;

FIG. 10 is a schematic structural view of a grouped centering strut according to an embodiment of the present utility model;

FIG. 11 is a schematic structural view of an integrally formed centering strut connected to a dual voice coil according to an embodiment of the present utility model;

FIG. 12 is a schematic diagram of a connection between a grouped centering strut and a dual voice coil according to an embodiment of the present utility model;

fig. 13 is an exploded view of a speaker according to an embodiment of the present utility model;

description of the reference numerals:

1. a first voice coil; 2. a second voice coil; 3. a first center magnetic steel; 4. a second center magnetic steel; 5. a first side magnetic steel; 6. a second side magnetic steel; 7. a first central washer; 8. a second central washer; 9. a first side washer; 10. second Bian Huasi; 20. centering support pieces; 30. a basin stand; 40. a vibrating diaphragm; 50. a dome; 60. a magnetic shield; 11. a first voice coil lead; 12. a second voice coil lead; 21. a third voice coil lead; 22. a fourth voice coil lead; 111. a first inscription pad; 121. a second inner bonding pad; 211. a third inscription pad; 221. a fourth inscription pad; 112. a first external bonding pad; 122. a second external bonding pad; 212. a third external bonding pad; 222. and a fourth external bonding pad.

Detailed Description

In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

The sensitivity of voice coil loudspeaker voice coil to external stress condition can be improved to above-mentioned sound generating unit of this application to improved sound generating unit's sensitivity, be particularly useful for the application scenario that requires higher to sound generating unit sensitivity, like micro-speaker and have micro-speaker's electronic equipment, like cell-phone, panel computer etc. below, explain through concrete embodiment:

in an alternative embodiment, as shown in fig. 1-2, a sound generating unit includes a plurality of voice coils;

the voice coils are sequentially arranged along the horizontal direction, adjacent voice coils are contacted with each other, and the current directions of the adjacent voice coils at the contact positions are opposite; in one implementation, the plurality of voice coils are sequentially arranged one by one in the horizontal direction;

each voice coil is provided with corresponding magnetic steel, and the polarities of the corresponding magnetic steels of the adjacent voice coils are opposite;

the plurality of voice coils are electrically connected in sequence and have two output leads.

The number of the voice coils may be more than two, for example, 2, 3 or 4 voice coils may be used;

in this embodiment, as shown in fig. 2, two voice coils are provided, and the voice coil comprises a first voice coil 1 and a second voice coil 2, and the first voice coil 1 and the second voice coil 2 are in contact;

as shown in fig. 3, in an alternative embodiment, the current direction of the first voice coil 1 is directed outwards perpendicular to the paper surface, and correspondingly, the current direction of the second voice coil 2 contacting the first voice coil 1 is directed inwards perpendicular to the paper surface; alternatively, as shown in fig. 4, in another alternative embodiment, the current direction of the first voice coil 1 is directed inward perpendicular to the paper surface, and correspondingly, the current direction of the second voice coil 2 contacting the first voice coil 1 is directed outward perpendicular to the paper surface; thereby ensuring that the current directions of adjacent voice coils at the contact positions are opposite;

as shown in fig. 2, the magnetic steel corresponding to the first voice coil 1 comprises a first central magnetic steel 3 and a first side magnetic steel 5, and the magnetic steel corresponding to the second voice coil 2 comprises a second central magnetic steel 4 and a second side magnetic steel 6;

the first central magnetic steel 3 is arranged on the inner side of the first voice coil 1, namely the first voice coil 1 is arranged around the first central magnetic steel 3, and the first side magnetic steel 5 is arranged on the outer side of the first voice coil 1, namely the first side magnetic steel 5 is arranged around the outer side of the first voice coil 1; the second central magnetic steel 4 is arranged on the inner side of the second voice coil 2, namely the second voice coil 2 is arranged around the second central magnetic steel 4, and the second side magnetic steel 6 is arranged on the outer side of the second voice coil 2, namely the second side magnetic steel 6 is arranged around the outer side of the second voice coil 2;

the polarities of the first central magnetic steel 3 and the second central magnetic steel 4 are opposite, the polarities of the first side magnetic steel 5 and the first central magnetic steel 3 are opposite, and the polarities of the second side magnetic steel 6 and the second central magnetic steel 4 are opposite; for example, in an alternative embodiment, as shown in fig. 2, the magnetizing direction of the first central magnetic steel 3 passes through the first voice coil 1 from bottom to top, the magnetizing direction of the second central magnetic steel 4 passes through the second voice coil 2 from top to bottom, the magnetizing direction of the first side magnetic steel 5 passes through the second voice coil 2 from top to bottom, and the magnetizing direction of the second side magnetic steel 6 passes through the second voice coil from bottom to top.

The voice coils are sequentially and electrically connected, and the voice coils are provided with two output leads, namely, compared with the prior art that each voice coil is provided with two leads of an anode and a cathode, in the embodiment, the voice coils are sequentially and electrically connected, then the voice coils are used as a whole to externally provide the two output leads, through the arrangement, compared with the voice coils with 2n output leads, the number of the output leads is reduced, the convenience of circuit connection is improved, the assembly simplicity of the whole voice coil is improved, the complexity of circuit connection cannot be caused due to the introduction of a multi-voice coil structure, and the design of the voice coils is more effective and reliable.

In order to further ensure the balance of the stress of the voice coils, in an alternative embodiment, the two output leads may be arranged to be symmetrical about the center point of the plurality of voice coils, as shown in fig. 5, the leads inherent to the first voice coil 1 include a first voice coil lead 11 and a second voice coil lead 12, the leads inherent to the second voice coil 2 include a third voice coil lead 21 and a fourth voice coil lead 22, the two external output leads may be made to be the second voice coil lead 12 and the third voice coil lead 21, the second voice coil lead 12 and the third voice coil lead 21 may be symmetrical about the center point of the rectangle enclosed by the first voice coil 1 and the second voice coil 2, and the other two leads may be electrically connected inside the first voice coil lead 11 and the fourth voice coil lead 22; the two external output leads may be the first voice coil lead 11 and the fourth voice coil lead 22, the first voice coil lead 11 and the fourth voice coil lead 22 may be symmetrical with respect to the center point of the rectangle surrounded by the first voice coil 1 and the second voice coil 2, and the other two leads may be electrically connected inside the second voice coil lead 12 and the third voice coil lead 21.

Wherein, in order to realize the electric connection of the plurality of voice coils, in an alternative embodiment, the plurality of voice coils can be connected in parallel, and in another alternative embodiment, the plurality of voice coils can be connected in series.

To achieve serial or parallel connection of the voice coils, in an alternative embodiment, as shown in fig. 6, a centering pad 20 is also included;

the plurality of voice coils are connected in parallel or in series through the centering support 20; specifically, the centering support has a bonding pad adapted to each of the voice coils;

each voice coil corresponds to two bonding pads;

each voice coil is connected with other voice coils in parallel or in series through two corresponding bonding pads;

each bonding pad comprises an inscription bonding pad and a corresponding external bonding pad, wherein the inscription bonding pad is used for being conducted with a lead wire of the voice coil, and the external bonding pad is used for being conducted with an external circuit;

as shown in fig. 6, the centering support 20 includes a first internal connection pad 111 for conducting with the first voice coil lead 11, a second internal connection pad 121 for conducting with the second voice coil lead 12, a third internal connection pad 211 for conducting with the third voice coil lead 21, and a fourth internal connection pad 221 for conducting with the fourth voice coil lead 22, and correspondingly, as shown in fig. 7, the centering support 20 further includes a first external connection pad 112 for conducting with an external circuit, a second external connection pad 122 for conducting with an external circuit, a third external connection pad 212 for conducting with an external circuit, and a fourth external connection pad 222 for conducting with an external circuit, and fig. 8 is a schematic diagram of a sound generating unit including the centering support 20 after the electrical connection is implemented;

in an alternative embodiment, to realize the serial connection of the first voice coil 1 and the second voice coil 2, as shown in fig. 6 and 7, an alternative connection manner is as follows:

the first external bonding pad 112-the third internal bonding pad 211-the third voice coil lead 21-the fourth voice coil lead 22-the second external bonding pad 122-the fourth external bonding pad 222-the second voice coil lead 12-the first voice coil lead 11-the third external bonding pad 212;

in another alternative embodiment, to implement the parallel connection of the first voice coil 1 and the second voice coil 2, as shown in fig. 6 and 7, an alternative connection manner is as follows:

first inner bond pad 111-first voice coil lead 11-third inner bond pad 211-third voice coil lead 21-first outer bond pad 112-third outer bond pad 212;

second inner bond pad 121-second voice coil lead 12-fourth inner bond pad 221-fourth voice coil lead 22-second outer bond pad 122-fourth outer bond pad 222;

in the embodiment, the multi-voice coil is connected in series or in parallel through the centering support piece on one hand and is conducted with an external FPC through the centering support piece on the other hand through the introduction of the centering support piece, so that the flexibility of multi-voice coil circuit connection is improved, and the stability of the multi-voice coil structure is also improved.

In another alternative embodiment, the centering support 20 is symmetrically disposed, thereby further ensuring the balance and stability of the stress of the multiple voice coils and improving the sensitivity of the sound generating unit.

In another alternative embodiment, the centering support 20 may be integrally formed, as shown in fig. 9, where the centering support 20 is a complete circle, the centering support is integrally combined, and the voice coils are connected in series and in parallel through the wires on the centering support 20; the bonding pads may be split into a plurality of groups, for example, two or four, as shown in fig. 10, and in this embodiment, the centering support pieces 20 are split into four, and are respectively connected with the voice coil leads, and then are externally connected with an FPC, so as to realize serial connection and parallel connection;

fig. 11 is a schematic structural view of an integrally formed centering support piece 20 connected to a double voice coil, and fig. 12 is a schematic structural view of a split centering support piece 20 connected to a double voice coil.

In the embodiment, through setting up the centering support piece of various forms, richened the connected mode of many voice coil loudspeaker voice coil structures, improved the flexibility that many voice coil loudspeaker voice coil structures connect.

In another alternative embodiment, as shown in fig. 13, a basin stand 30 is further included;

the voice coils are arranged in the basin frame 30 and are sequentially arranged along the short axis direction of the basin frame 30, the length of the voice coils can be longer by arranging the voice coils side by side along the short axis direction of the basin frame 30, the central magnetic steel assembly is split into two voice coils along the long axis direction, the length-width ratio is larger, the use efficiency of the central magnetic steel is more facilitated, the value B is improved, and therefore the sensitivity of the sounding unit is further improved;

in another alternative embodiment, as shown in fig. 13, a speaker includes a sound generating unit in any of the foregoing embodiments, and according to fig. 2 and 13, the speaker includes a dome 50, a diaphragm 40, a dual voice coil structure (including a first voice coil 1 and a second voice coil 2), a cone frame 30, a centering support 20, a center washer (including a first center washer 7 and a second center washer 8), a Bian Huasi (including a first side washer 9 and a second side washer Bian Huasi), a center magnetic steel (including a first center magnetic steel 3 and a second center magnetic steel 4), side magnetic steels (including a first side magnetic steel 5 and a second side magnetic steel 6), and a magnetic cover 60, and their specific positions are common settings in the speaker field, which are not repeated herein, and as can be seen in fig. 13, the centering support 20 is divided into two sets of settings.

In another alternative embodiment, an electronic device includes the speaker, and in this embodiment, the electronic device may be any portable electronic device, such as a mobile phone, a tablet computer, a wearable device, and so on.

In summary, according to the sound generating unit, the speaker and the electronic device provided by the utility model, the voice coils are split into the plurality of voice coils, the plurality of voice coils are sequentially arranged along the horizontal direction, the adjacent voice coils are contacted with each other, the current directions of the adjacent voice coils at the contact positions are opposite, and the polarities of the magnetic steels corresponding to the adjacent voice coils are opposite, based on the left hand rule, the stress directions of each voice coil are the same, the consistency of the stress of the plurality of voice coils is ensured, the adjacent voice coils are contacted, the space is fully utilized, the maximization of the B value and the voice coil L can be realized in a limited space, meanwhile, compared with the existing single-voice coil setting mode, the utilization rate of the magnetic steels is improved through the split of the middle area of the magnetic steels, and on the other hand, under the same length, the multiple voice coils have longer circumference than the single voice coil, so the thickness of the voice coils is correspondingly reduced, the distance between the adjacent magnetic steels (the side magnetic steel and the center magnetic steel) is reduced, namely the magnetic gap is reduced, the magnetic attraction force is increased, the stress of the voice coils is improved, in addition, the electric connection between the multiple voice coils is realized through the symmetrically arranged centering support pieces, the multiple voice coils are provided with only two output leads which are symmetrical in point as a whole, compared with the n voice coils with 2n output leads, the number of the output leads is reduced, the convenience of circuit connection is increased, the assembly simplicity of the whole voice coil is improved, the complexity of circuit connection is not caused by the introduction of the multiple voice coil structures, and therefore, the comprehensive consideration is given to the aspects of mechanical structure design, circuit structure design, stress design and the like of the sounding unit, the sensitivity of the voice coil to external stress is effectively improved, so that the sensitivity of the sounding unit is greatly improved, the loudness of the sounding unit is increased, and the voice coil is particularly suitable for application scenes of electronic equipment with light and thin design requirements.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.

Claims (12)

1. A sound generating unit comprising a plurality of voice coils;

the voice coils are sequentially arranged along the horizontal direction, adjacent voice coils are contacted with each other, and the current directions of the adjacent voice coils at the contact positions are opposite;

each voice coil is provided with corresponding magnetic steel, and the polarities of the corresponding magnetic steels of the adjacent voice coils are opposite; the voice coils are electrically connected in sequence, and the voice coils are integrally provided with two output leads;

the two output leads are centrally symmetrical about the center point of the plurality of voice coils.

2. The sound generating unit of claim 1, wherein the plurality of voice coils are connected in parallel or in series.

3. The sound unit of claim 2, further comprising a centering tab;

the plurality of voice coils are connected in parallel or in series through the centering support.

4. A sound unit according to claim 3, wherein said centering tabs have pads adapted to each of said voice coils;

each voice coil corresponds to two bonding pads;

each of the voice coils is connected in parallel or in series with the other voice coils through the corresponding two of the bonding pads.

5. The sound generating unit of claim 4, wherein the centering tabs are symmetrically disposed.

6. A sound unit according to claim 4 or 5, wherein the centring disk is integrally formed or split into a plurality of groups based on the pads.

7. The sound unit of claim 1, wherein the magnetic steel comprises a center magnetic steel;

the central magnetic steel corresponding to each voice coil is arranged on the inner side of the voice coil;

the polarities of the central magnetic steels corresponding to the adjacent voice coils are opposite.

8. The sound unit of claim 7, wherein the magnetic steel further comprises edge magnetic steel;

the side magnetic steel corresponding to each voice coil is arranged around the outer side of the voice coil;

the polarities of the side magnetic steel and the center magnetic steel corresponding to each voice coil are opposite.

9. A sound generating unit according to any one of claims 1 to 5 and 7 to 8, wherein the number of voice coils is 2.

10. A sound generating unit according to any one of claims 1 to 5 and 7 to 8, further comprising a basin stand;

the voice coils are arranged in the basin frame and are sequentially arranged along the short axis direction of the basin frame.

11. A loudspeaker comprising a sound generating unit according to any one of claims 1 to 10.

12. An electronic device comprising a loudspeaker as claimed in claim 11.