WO2016155352A1

WO2016155352A1 - Voice coil and speaker provided with voice coil

Info

Publication number: WO2016155352A1
Application number: PCT/CN2015/096959
Authority: WO
Inventors: 邵明辉; 杨健斌
Original assignee: 歌尔声学股份有限公司
Priority date: 2015-03-31
Filing date: 2015-12-10
Publication date: 2016-10-06
Also published as: CN204498369U

Abstract

A voice coil and a speaker provided with said voice coil, relating to the technical field of electro-acoustic products, and formed of a wound voice coil wire, the lateral cross-section of the voice coil wire being rectangular, the ratio of the size of the long sides of the rectangular voice coil wire compared to the size of the short sides being π-4π, and the direction of extension of the long sides of the rectangular voice coil wire being the same as the direction of width of the voice coil. The present voice coil and the speaker provided with said voice coil solve the problem of the high difficulty of winding voice coils in the prior art; the difficulty of winding of the present voice coil and the speaker provided with said voice coil is low and winding efficiency is high, the sensitivity of the speaker is high, harmonic distortion is low, and acoustic performance is good.

Description

Voice coil and speaker with the voice coil

Technical field

The utility model relates to the technical field of electroacoustic products, in particular to a voice coil and a loudspeaker provided with the voice coil.

Background technique

A speaker is an important acoustic component in portable electronic devices. It is an energy conversion device for converting acoustic electric signals into sound signals. The speaker usually includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm and a voice coil combined. The voice coil is a driving component of the speaker. When the alternating audio current passes through the voice coil, the voice coil generates a change with the audio current. The magnetic field, this changing magnetic field interacts with or repels the magnetic field of the speaker magnetic circuit system, causing the voice coil to generate mechanical vibrations that cut the magnetic lines of force, thereby causing the diaphragm to vibrate and emit sound. The existing voice coil is usually wound by a voice coil wire having a circular cross-sectional shape. However, the voice coil of this structure is wound around and has a large gap between adjacent voice coil wires, so that the voice coil is made. The energy of the magnetic field cannot be fully utilized, and the volume ratio of the voice coil is low, resulting in poor sensitivity of the speaker and poor heat dissipation capability of the voice coil.

In view of the above problem that the cross section is a circular voice coil line, the currently existing solution is to use a voice coil wire wound voice coil having a square cross section, and the application of a square voice coil line can be improved to some extent. The volume ratio of the voice coil, improving the heat dissipation capability, etc., but since the cross section is square, the height and width of the wound voice coil are proportional to the side length of the square, which is to adjust the sensitivity and THD (Total Harmonic Distortion). There are certain drawbacks in terms of distortion. For example, using the method of increasing the voice coil height to improve the symmetry of Bl(x) (the magnetic field energy acting on the voice coil) requires that the voice coil line with a square cross section must have a larger The side length, but the increase in the side length also increases the width of the voice coil, thereby increasing the magnetic gap and reducing the sensitivity of the product.

For the above problem that the cross section is a square voice coil line, the technician proposes a voice coil 10a wound by a voice coil wire having a rectangular cross section, as shown in FIG. 2, the rectangular voice coil. The ratio A/B of the long side dimension to the short side dimension of the line is less than π, where π = 3.1415926, the width W of the voice coil 10a is constituted by the short side of the voice coil line, and the height H is constituted by the long side of the voice coil line. Such a voice coil wire can be adjusted and adjusted in the design by adjusting the aspect ratio of the rectangular voice coil wire. However, the voice coil wire is easy to rotate during the winding of the voice coil, as shown in FIG. 1 , resulting in an abnormal arrangement of the voice coil wires, and the voice coils that are wound are irregular; and the voice coil 10a is four. The voice coil line 12a is wound, and the number of voice coil layers is too large, and the voice coil line is more likely to rotate at the position where the winding is changed, and the winding is more difficult.

Utility model content

In view of the above drawbacks, the first technical problem to be solved by the present invention is to provide a voice coil, the voice coil wire of the voice coil does not rotate when wound, the winding is difficult, the production efficiency is high, and the adjacent The gap between the voice coil lines is small, the volume ratio of the voice coil is high, and the heat dissipation performance is good. At the same time, the height and width of the voice coil can be well balanced and adjusted during design.

Based on an inventive concept, the second technical problem to be solved by the present invention is to provide a speaker having a low voice coil winding and high sensitivity, and the acoustic performance of the product such as THD is easier to adjust.

In order to solve the above first technical problem, the technical solution of the present invention is:

a voice coil, which is wound by a voice coil wire, the cross section of the voice coil wire is a rectangle, and a ratio of a long side dimension to a short side dimension of the rectangular voice coil wire is π 4 4π, and the rectangle The extending direction of the long side of the voice coil line coincides with the width direction of the voice coil.

As an embodiment, the ratio of the long side dimension to the short side dimension of the rectangular voice coil line is π.

Wherein, the width of the voice coil is twice the size of the long side of the rectangular voice coil line.

In another embodiment, the ratio of the long side dimension to the short side dimension of the rectangular voice coil line is 4π.

Wherein, the width of the voice coil is equal to the long side dimension of the rectangular voice coil line.

In still another embodiment, the four corners of the rectangular voice coil line are provided with an arc Chamfering.

Wherein, the radius of the circular chamfer is less than or equal to 1/2 of the short side dimension of the rectangular voice coil line.

Wherein, the voice coil wire is an enameled wire.

In order to solve the above second technical problem, the technical solution of the present invention is:

A speaker includes a vibration system including a diaphragm and a voice coil, and a voice coil system, the voice coil being the voice coil described above.

After adopting the above technical solution, the beneficial effects of the utility model are:

Since the voice coil of the present invention is wound by a voice coil wire having a rectangular cross section, the ratio of the long side dimension to the short side dimension of the rectangular voice coil line is π to 4π, and the extending direction of the long side of the rectangular voice coil line It is consistent with the width direction of the voice coil. The ratio of the long side dimension to the short side dimension of the voice coil line is π~4π, which makes the long side and the short side of the voice coil line easier to distinguish. In the process of winding the voice coil, the phenomenon of wire rotation does not occur, and the winding is reduced. The difficulty of the system; and the length of the voice coil is formed by the long side of the voice coil line, and the number of voice coil lines of the voice coil can be reduced from the existing four layers to two layers or one layer, further reducing the difficulty of winding and improving The efficiency of the voice coil winding, and the adhesion between adjacent voice coil lines is greater. At the same time, the gap between the adjacent voice coil lines is small, the volume ratio of the voice coil is high, and the magnetic field strength occupied by the entire voice coil can be fully utilized, the sensitivity of the speaker can be greatly improved; and the heat dissipation performance of the voice coil is better; The height and width of the voice coil can be flexibly adjusted by adjusting the ratio of the long side to the short side of the rectangular voice coil line, and the speaker THD can be flexibly improved without affecting the width of the voice coil without affecting the magnetic gap. The width can greatly improve the acoustic performance of the speaker.

Since the ratio of the long side dimension to the short side dimension of the rectangular voice coil line is π, the voice coil line having a rectangular cross section at this time can obtain a voice coil line having a diameter equal to the short side of the rectangular voice coil line and having a circular cross section. With a consistent cross-sectional area, the rectangular voice coil has fewer layers of windings under the same voice coil resistance, making the design of the voice coil easier and less difficult to wind. Meanwhile, when the ratio of the long side dimension to the short side dimension of the voice coil line is π, the ratio of the voice coil line in the present invention to the short side dimension in the prior art is 4/π, and The long side dimension of the voice coil line is the same as the voice coil line of the short side dimension of the middle voice coil line of the utility model. Under the same voice coil resistance, the two will have the same voice coil line length and sound. The same acoustic performance can be achieved by the height of the circle and the weight of the voice coil. However, in the winding process of the voice coil, the voice coil wire does not rotate, the winding is easier, and the winding efficiency is higher.

Since the ratio of the long side dimension to the short side dimension of the rectangular voice coil line is 4π, the voice coil line having a rectangular cross section at this time can obtain a voice coil having a circular cross section with a diameter of 2 times the short side of the rectangular voice coil line. The uniform cross-sectional area of the line, the rectangular voice coil line has fewer layers of windings under the same voice coil resistance, making the design of the voice coil easier and less difficult to wind.

Since the voice coil of the speaker of the present invention is the voice coil described above, the winding of the voice coil is low in difficulty and the winding efficiency is high, and the magnetic field strength obtained by the voice coil is ensured, and the sensitivity is improved, and the voice coil can be more easily The height and width are adjusted to ensure the THD of the product.

In summary, the voice coil of the present invention and the speaker provided with the voice coil solve the technical problems of the difficulty of winding the voice coil in the prior art, and the voice coil of the present invention and the voice coil of the speaker provided with the voice coil The winding is difficult, the winding efficiency is high, the speaker sensitivity is high, the harmonic distortion is small, and the acoustic performance is good.

DRAWINGS

1 is a schematic view showing a phenomenon of rotation of a voice coil line occurring in a winding process of a voice coil in the prior art;

2 is a schematic structural view of a voice coil in the prior art;

3 is a schematic structural view of a voice coil according to an embodiment of the present invention;

4 is a schematic structural view of a second voice coil according to an embodiment of the present invention;

Figure 5 is a schematic structural view of a third voice coil according to an embodiment of the present invention;

In the figure: 10a, voice coil, 10b, voice coil, 10c, voice coil, 10d, voice coil, 12a, voice coil, 12b, voice coil, 12c, voice coil, 12d, voice coil, A, A ', A'', the length of the voice coil line, B, B', B", the width of the voice coil line, W, W', W", the width of the voice coil, H, H', H", the height of the voice coil .

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment 1:

As shown in FIG. 3, a voice coil, the voice coil 10b is wound by a voice coil wire 12b, and the voice coil wire 12b has a rectangular cross section. The extending direction of the long side of the voice coil wire 12b coincides with the width direction of the voice coil 10b, that is, the width W' of the voice coil 10b is constituted by the long side of the voice coil wire 12b, and the height H' of the voice coil 10b is composed of the voice coil wire 12b. The short side is composed. Let the length of the rectangular voice coil line (long side dimension) be A', the width (short side dimension) be B', and the ratio of the long side dimension of the voice coil line 10b to the short side dimension is π~4π, that is, A'/B '=π~4π, this embodiment is preferably A'/B'=π. When A'/B' = π, the voice coil line 12b can obtain a uniform cross-sectional area of the voice coil line having a circular cross section of a diameter B', and the voice coil 10b at the same voice coil resistance value. It has fewer layers of windings, making the design of the voice coil easier and less difficult to wind. At the same time, compared with the voice coil lines of A/B=4/π and A=2B' (shown in FIG. 2) in the prior art, both will have the same voice coil under the same voice coil resistance. The line length, the voice coil height and the voice coil weight can achieve the same acoustic performance, but the utility model does not rotate the voice coil wire during the voice coil winding process, and the winding is easier and the winding efficiency is higher.

As shown in FIG. 3, the width W' of the voice coil 10b is twice the long side dimension A' of the voice coil 12b, that is, the voice coil 10b is wound by two layers of voice coil wires 12b, and the number of winding layers is now Half of the technology effectively reduces the difficulty of winding the voice coil and improves the efficiency of voice coil winding.

As shown in FIG. 3, the voice coil wire 12b is an enamel wire including a strip-shaped metal core for conducting electricity on the inner side and an insulating layer wrapped around the outer periphery of the metal core.

Embodiment 2:

As shown in FIG. 4, the embodiment is basically the same as the first embodiment, and the difference is:

The voice coil 10c is wound by the voice coil wire 12c, and the extending direction of the long side of the voice coil wire 12c coincides with the width direction of the voice coil 10c, that is, the width W" of the voice coil 10c is composed of the voice coil wire 12c. The long side is constituted, and the height H" of the voice coil 10c is constituted by the short side of the voice coil line 12c, and the ratio of the long side size to the short side size of the voice coil line is 4π, that is, A"/B" = 4π. Voice coil 10c The width W" is equal to the long side dimension A' of the voice coil wire 12c, that is, the voice coil 10c is wound by a two-layer voice coil wire 12c.

Compared with the first embodiment, the aspect ratio of the voice coil wire is further increased, so that the number of winding layers of the voice coil is reduced from two layers to one layer, thereby making the voice coil winding of the present embodiment easier. The winding efficiency is higher.

Embodiment 3:

As shown in FIG. 5, the present embodiment is basically the same as the first embodiment and the second embodiment, and the difference is as follows:

The voice coil 10d is wound by the voice coil wire 12d, and the four corners of the voice coil wire 12d are provided with arc chamfering, and the radius of the arc chamfer is less than or equal to 1/2 of the short side dimension of the voice coil wire 12d. .

The arc chamfering setting ensures that the outer layer of the voice coil wire is evenly coated, the adjacent voice coil wires are firmly bonded, and the appearance of the voice coil shape can be increased.

The present embodiment only shows the drawings of substantially the same embodiment as the second embodiment, and the technicians of the drawings having substantially the same embodiment as the first embodiment can draw the creative work according to FIG. 3 and FIG. Therefore, the drawings of substantially the same embodiment as the first embodiment are omitted here.

Embodiment 4:

A speaker includes a vibration system and a magnetic circuit system, and the vibration system includes a diaphragm and a voice coil that are combined. The voice coils are the voice coils described in the first embodiment, the second embodiment, and the third embodiment.

Since the speaker of the present invention adopts the voice coil described in the first embodiment, the second embodiment and the third embodiment, the winding of the voice coil is low in difficulty, the winding efficiency is high, and the strong magnetic field strength obtained in the voice coil is ensured, and the sensitivity is improved. At the same time, it is easier to adjust the height and width of the voice coil to ensure the THD of the product.

The present invention is not limited to the above specific embodiments, and is a person of ordinary skill in the art. From the above ideas, the changes made by the staff without creative labor fall within the scope of protection of the present invention.

Claims

a voice coil, which is wound by a voice coil, wherein the voice coil wire has a rectangular cross section, wherein the ratio of the long side dimension to the short side dimension of the rectangular voice coil line is π to 4π, and The extending direction of the long side of the rectangular voice coil line coincides with the width direction of the voice coil.
The voice coil according to claim 1, wherein a ratio of a long side dimension to a short side dimension of said rectangular voice coil line is π.
The voice coil according to claim 2, wherein the width of the voice coil is twice the size of the long side of the rectangular voice coil.
The voice coil according to claim 1, wherein a ratio of a long side dimension to a short side dimension of said rectangular voice coil line is 4π.
The voice coil according to claim 4, wherein the width of the voice coil is equal to the length of the long side of the rectangular voice coil.
The voice coil according to any one of claims 1 to 5, characterized in that the four corners of the rectangular voice coil line are provided with arc chamfers.
The voice coil according to claim 6, wherein a radius of the circular chamfer is less than or equal to 1/2 of a short side dimension of the rectangular voice coil.
A voice coil according to claim 1, wherein said voice coil wire is an enameled wire.
A loudspeaker comprising a vibration system and a magnetic circuit system, the vibration system comprising a diaphragm and a voice coil combined, wherein the voice coil is a voice coil according to any of claims 1 to 8.