CN218634260U - Voice coil, vibration subassembly and miniature speaker - Google Patents
Voice coil, vibration subassembly and miniature speaker Download PDFInfo
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- CN218634260U CN218634260U CN202120924585.1U CN202120924585U CN218634260U CN 218634260 U CN218634260 U CN 218634260U CN 202120924585 U CN202120924585 U CN 202120924585U CN 218634260 U CN218634260 U CN 218634260U
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Abstract
The utility model discloses a voice coil, vibration subassembly and miniature speaker, miniature speaker includes the vibration subassembly, and the vibration subassembly includes the voice coil, and the voice coil includes first coil and the second coil of series connection or parallelly connected, and the second coil is located on the lateral wall face of first coil bottom, and first coil is formed by the winding of first wire rod, and the second coil is formed by the winding of second wire rod, and the line footpath of second wire rod is less than the line footpath of first wire rod; the side wall at the bottom of the first coil is wound with the second coil with the diameter smaller than that of the first coil, the height of the voice coil in the magnetic circuit gap is adjusted through the first coil, and the whole weight of the voice coil is adjusted through the second coil, so that the performance requirements of the micro-speaker at low frequency and medium frequency are met.
Description
Technical Field
The utility model relates to an acoustics device technical field especially relates to a voice coil loudspeaker voice coil, vibration subassembly and miniature speaker.
Background
With the development of society, micro speakers as an electroacoustic transducer have been widely used in microelectronic devices such as smart phones, camcorders, cameras, and notebook computers.
At present, the loudspeaker is developed in the direction of large amplitude and miniaturization, and the increase of the amplitude requires a strong driving force, which is often realized by increasing the total length of the voice coil in the magnetic circuit gap, but the voice coil as a driving member inevitably weighs its own weight while increasing its total length, resulting in a decrease in performance sensitivity, and thus resulting in a decrease in acoustic performance of the micro-loudspeaker.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provided are a voice coil, a vibration module and a micro-speaker having excellent acoustic performance.
In order to solve the technical problem, the utility model discloses a technical scheme one be: the utility model provides a voice coil loudspeaker voice coil, is including series connection or parallelly connected first coil and second coil, the second coil is located on the lateral wall face of first coil bottom, first coil is formed by first wire rod winding, the second coil is formed by second wire rod winding, the line footpath of second wire rod is less than the line footpath of first wire rod.
Further, the second coil is arranged on the inner side wall of the first coil.
Further, the second coil is arranged on the outer side wall of the first coil.
Furthermore, the second coil is arranged on the inner side wall and the outer side wall of the first coil.
Further, the ratio of the wire diameter of the first wire to the wire diameter of the second wire is greater than 1 and less than 2.
Further, the cross section of the first wire rod is rectangular, square or rhombic; the cross section of the second wire is rectangular, square or rhombic.
Further, the top edges of the cross sections of the two adjacent first wires on the top of the first coil are flush.
In order to solve the technical problem, the utility model discloses a technical scheme two be: the vibration assembly comprises the voice coil.
In order to solve the technical problem, the utility model discloses a technical scheme three be: a micro speaker includes the voice coil.
The beneficial effects of the utility model reside in that: the utility model provides a voice coil loudspeaker voice coil, vibration subassembly and micro loudspeaker have novel structure and the good characteristics of acoustic performance, twine the second coil that is less than first coil diameter on the lateral wall of first coil bottom, adjust the height of voice coil loudspeaker voice coil in magnetic circuit clearance through first coil, adjust the holistic weight of voice coil loudspeaker voice coil through the second coil to satisfy micro loudspeaker's performance demand at low frequency and intermediate frequency.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a micro-speaker according to an embodiment of the present invention;
FIG. 2 is a detail view at A of FIG. 1;
fig. 3 is a graph illustrating a midrange loudness test of a micro-speaker according to an embodiment of the present invention.
Description of the reference symbols:
1. a voice coil; 11. a first coil; 111. a first wire rod; 12. a second coil; 121. a second wire rod; 2. vibrating diaphragm; 3. central magnetic steel; 4. edge magnetic steel; 5. a magnetic circuit gap; 6. a basin stand.
Detailed Description
In order to explain the technical contents, 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 3, a voice coil includes a first coil 11 and a second coil 12 connected in series or in parallel, the second coil 12 is disposed on a side wall surface of a bottom of the first coil 11, the first coil 11 is formed by winding a first wire 111, the second coil 12 is formed by winding a second wire 121, and a wire diameter of the second wire 121 is smaller than a wire diameter of the first wire 111.
From the above description, the beneficial effects of the present invention are: the side wall of the bottom of the first coil 11 is wound with a second coil 12 with a smaller wire diameter than the first coil 11, the height of the voice coil 1 in the magnetic circuit gap 5 is adjusted through the first coil 11, and the weight of the whole voice coil 1 is adjusted through the second coil 12, so that the performance requirements of the micro-speaker at low frequency and medium frequency are met.
Further, the second coil 12 is disposed on an inner sidewall of the first coil 11.
Further, the second coil 12 is disposed on an outer side wall of the first coil 11.
Further, the second coil 12 is disposed on both the inner side wall and the outer side wall of the first coil 11.
As can be seen from the above description, the relative positions of the first coil 11 and the second coil 12 can be set according to the actual application requirements, so as to enrich the diversity of the structure.
Further, a ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is greater than 1 and less than 2.
As can be seen from the above description, the ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is greater than 1 and less than 2, so that the acoustic performance is optimal.
Further, the cross section of the first wire 111 is rectangular, square or rhombic; the cross section of the second wire 121 is rectangular, square or diamond.
As can be seen from the above description, the cross-sectional shapes of the first wire 111 and the second wire 121 can be set according to the practical application requirements.
Further, the top edges of the cross sections of two adjacent first wires 111 at the top of the first coil 11 are flush.
As can be seen from the above description, the top sides of the cross sections of the two adjacent first wires 111 at the top of the first coil 11 are flush, so as to ensure the flatness of the bonding surface of the first coil 11 and the external member.
The vibration assembly comprises the voice coil 1.
A micro-speaker includes the voice coil 1.
Example one
Referring to fig. 1 to fig. 3, a first embodiment of the present invention is: the micro loudspeaker is applied to microelectronic equipment such as a smart phone, a portable video camera, a notebook computer and the like, and comprises a basin frame 6, a vibration assembly and a magnetic circuit assembly, wherein the vibration assembly and the magnetic circuit assembly are arranged on the basin frame 6, specifically, the vibration assembly comprises a voice coil 1 and a vibrating diaphragm 2 which are connected, the magnetic circuit assembly comprises a magnetic bowl, and a central magnetic steel 3 and an edge magnetic steel 4 which are arranged on the magnetic bowl, the magnetic bowl is connected with the basin frame 6, a magnetic circuit gap 5 is formed between the central magnetic steel 3 and the edge magnetic steel 4, and at least one part of the voice coil 1 is positioned in the magnetic circuit gap 5; more specifically, the voice coil 1 includes a first coil 11 and a second coil 12 connected in series or in parallel, the second coil 12 is disposed on a side wall surface of a bottom portion of the first coil 11, the first coil 11 is formed by winding a first wire 111, the second coil 12 is formed by winding a second wire 121, a wire diameter of the second wire 121 is smaller than a wire diameter of the first wire 111, a top portion of the first coil 11 is connected to the diaphragm 2, the bottom portion of the first coil 11 and the second coil 12 are disposed in the magnetic circuit gap 5, a volume ratio of the voice coil 1 as a whole in the magnetic circuit gap 5 can be flexibly adjusted by adjusting a winding height of the first coil 11, and a weight of the voice coil 1 as a whole can be flexibly adjusted by adjusting a winding length of the second coil 12, so that performance requirements of the micro-speaker at low and medium frequencies are satisfied.
In this embodiment, the second coil 12 is disposed on the inner sidewall of the first coil 11, the ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is greater than 1 and less than 2, and the ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is collocated within a range greater than 1 and less than 2, so that the acoustic performance is optimal, specifically, as shown in fig. 3, three groups a, B, and C of voice coils 1 collocated with different wire diameter ratios are set to perform loudness testing, where in group a, the ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is 1; in group B, the ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is 1.11; in group C, the ratio of the wire diameter of the first wire 111 to the wire diameter of the second wire 121 is 1.25; it can be seen that, on the premise that the impedances of the groups of voice coils 1 are equal, the intermediate frequency loudness of the group C voice coils 1 and the group B voice coils 1 is higher than that of the group a voice coils 1.
In the present embodiment, in order to ensure the volume of the side magnetic steel 4 to the maximum, the second coil 12 is disposed on the inner side wall of the first coil 11; in addition, on the premise that the materials and the winding lengths of the first wire 111 and the second wire 121 are the same, the weight and the volume of the first wire 111 are greater than those of the second wire 121, and the impedance value of the first wire 111 is smaller than that of the second wire 121, that is, the heat generated by the second wire 121 is greater than that generated by the second wire 121, so that, optionally, in some other embodiments, the second coil 12 may be further disposed on an outer sidewall of the first coil 11, so as to increase a contact area between the second coil 12 and outside air, which is beneficial to improving heat dissipation performance, or the second coil 12 is disposed on both the inner sidewall and the outer sidewall of the first coil 11, and specifically, the relative positions of the first coil 11 and the second coil 12 may be set according to actual application requirements, so as to enrich the diversity of structures.
Optionally, the cross section of the first wire 111 is rectangular (as in this embodiment), square or diamond; the cross section of the second wire 121 is rectangular (as in the present embodiment), square or diamond; the cross-sectional shapes of the first wire 111 and the second wire 121 may be set according to practical application requirements.
Example two
Referring to fig. 2, the second embodiment of the present invention is a further improvement of the first coil on the basis of the first embodiment, and the difference between the first embodiment and the second embodiment is: the top sides of the cross sections of two adjacent first wires 111 at the top of the first coil 11 are flush, and the top sides of the cross sections of two adjacent first wires 111 at the top of the first coil 11 are flush, so that the flatness of the joint surface of the first coil 11 and the diaphragm 2 is ensured.
To sum up, the voice coil, the vibration assembly and the micro-speaker provided by the utility model have the characteristics of novel structure and good acoustic performance, the second coil with the diameter smaller than that of the first coil is wound on the side wall of the bottom of the first coil, the height of the voice coil in the magnetic circuit gap is adjusted through the first coil, and the integral weight of the voice coil is adjusted through the second coil, so that the performance requirements of the micro-speaker at low frequency and intermediate frequency are met; through setting up the second coil in the outside of first coil, realized the promotion of heat dispersion.
The above mentioned is only the embodiment of the present invention, and the patent scope of the present invention is not limited thereby, and 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 (9)
1. The utility model provides a voice coil loudspeaker voice coil, its characterized in that, including series connection or parallelly connected first coil and second coil, the second coil is located on the lateral wall face of first coil bottom, first coil is formed by the winding of first wire rod, the second coil is formed by the winding of second wire rod, the line footpath of second wire rod is less than the line footpath of first wire rod.
2. The voice coil of claim 1, wherein the second coil is disposed on an inner sidewall of the first coil.
3. The voice coil of claim 1, wherein the second coil is disposed on an outer sidewall of the first coil.
4. The voice coil of claim 1, wherein the second coil is disposed on both an inner sidewall and an outer sidewall of the first coil.
5. The voice coil of claim 1, wherein a ratio of a wire diameter of the first wire to a wire diameter of the second wire is greater than 1 and less than 2.
6. The voice coil of claim 1, wherein the cross-section of the first wire is rectangular, square, or diamond-shaped; the cross section of the second wire is rectangular, square or rhombic.
7. The voice coil of claim 1, wherein top edges of cross sections of two adjacent first wires of a top of the first coil are flush.
8. A vibration assembly comprising a voice coil as claimed in any one of claims 1 to 7.
9. A micro-speaker comprising a voice coil according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120924585.1U CN218634260U (en) | 2021-04-29 | 2021-04-29 | Voice coil, vibration subassembly and miniature speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120924585.1U CN218634260U (en) | 2021-04-29 | 2021-04-29 | Voice coil, vibration subassembly and miniature speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218634260U true CN218634260U (en) | 2023-03-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120924585.1U Active CN218634260U (en) | 2021-04-29 | 2021-04-29 | Voice coil, vibration subassembly and miniature speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218634260U (en) |
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2021
- 2021-04-29 CN CN202120924585.1U patent/CN218634260U/en active Active
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