CN204498369U - Voice coil loudspeaker voice coil and be provided with the loud speaker of this voice coil loudspeaker voice coil - Google Patents

Abstract

The utility model discloses a voice coil and a loudspeaker provided with the voice coil, which relates to the technical field of electroacoustic products and is formed by winding a voice coil wire. The cross section of the voice coil wire is rectangular, and the rectangular voice coil The ratio of the long side dimension to the short side dimension of the wire is π˜4π, and the extending direction of the long side of the rectangular voice coil wire is consistent with the width direction of the voice coil. The voice coil of the utility model and the loudspeaker provided with the voice coil solve the technical problems such as the high difficulty of winding the voice coil in the prior art, and the difficulty of winding the voice coil in the voice coil of the utility model and the speaker provided with the voice coil is low. High winding efficiency, high speaker sensitivity, low harmonic distortion and good acoustic performance.

Description

Voice coil and loudspeaker provided 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

The loudspeaker is an important acoustic component in portable electronic equipment, which is used to convert sound wave electrical signals into sound signals, and is an energy conversion device. The loudspeaker usually includes a vibration system and a magnetic circuit system. The vibration system includes a combined diaphragm and a voice coil. The voice coil is the driving part of the speaker. When an alternating audio current passes through the voice coil, the voice coil produces a sound that changes with the audio current Magnetic field, this changing magnetic field attracts or repels the magnetic field of the loudspeaker magnetic circuit system, causing the voice coil to generate mechanical vibrations that cut the magnetic lines of force, thereby driving the diaphragm to vibrate and produce sound. Existing voice coils are usually wound by voice coil wires with a circular cross-sectional shape. However, there are large gaps between adjacent voice coil wires after the voice coil of this structure is wound, making the voice coil 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 of the voice coil.

Aiming at the problem of the above-mentioned voice coil wire with a circular cross section, the current existing solution is to use a voice coil wire with a square cross section to wind the voice coil. The application of a voice coil wire with a square cross section can improve the performance to a certain extent. The volume ratio of the voice coil improves heat dissipation, etc., but because the cross section is a square, the height and width of the wound voice coil are proportional to the side length of the square, which is very important for simultaneously adjusting sensitivity and THD (TotalHarmonic Distortion, harmonic distortion ), there are certain disadvantages, such as using the method of increasing the height of the voice coil to improve the symmetry of Bl(x) (the magnetic field energy acting on the voice coil), it is required that the voice coil wire with a square cross section must have a larger side Long, but increasing the side length will also increase the width of the voice coil, thereby increasing the magnetic gap and reducing the sensitivity of the product.

Aiming at the above-mentioned problem that the cross-section is a square voice coil wire, technicians have proposed a voice coil 10a wound by a voice coil wire with a rectangular cross-section. As shown in FIG. The side dimension ratio A/B is less than π, where π=3.1415926, the width W of the voice coil 10a is formed by the short side of the voice coil wire, and the height H is formed by the long side of the voice coil wire. In the application of this kind of voice coil wire, the height and width of the voice coil can be well balanced and adjusted during design by adjusting the aspect ratio of the rectangular voice coil wire. However, this kind of voice coil wire is prone to rotation during the voice coil winding process, as shown in Figure 1, which leads to abnormal arrangement of the winding voice coil wire and irregular voice coil; and the voice coil 10a is composed of four The multi-layer voice coil wire 12a is wound, and the number of voice coil layers is too many, and the voice coil wire is more likely to rotate at the position where the voice coil wire changes layers, making winding more difficult.

Utility model content

In view of the above defects, the first technical problem to be solved by this utility model is to provide a voice coil, the voice coil wire of this voice coil will not rotate during winding, the winding difficulty is low, and the production efficiency is high; at the same time, adjacent The gap between the voice coil wires 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 idea, the second technical problem to be solved by the utility model is to provide a speaker with low voice coil winding difficulty and high sensitivity, and the acoustic properties such as THD of the product are easier to adjust.

For solving above-mentioned first technical problem, the technical scheme of the utility model is:

A voice coil, made of voice coil wire, the cross section of the voice coil wire is rectangular, the ratio of the long side size to the short side size of the rectangular voice coil wire is π～4π, and the rectangular voice coil wire The extending direction of the long side of the voice coil wire is consistent with the width direction of the voice coil.

As an implementation manner, the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is π.

Wherein, the width of the voice coil is twice the length of the long side of the rectangular voice coil wire.

As another implementation manner, the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 4π.

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

As yet another implementation manner, the four corners of the rectangular voice coil wire are all provided with arc chamfers.

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

Wherein, the voice coil wire is an enameled wire.

For solving above-mentioned second technical problem, the technical scheme of the utility model is:

A loudspeaker, comprising a vibrating system and a magnetic circuit system, the vibrating system comprising a combined diaphragm and a voice coil, the voice coil being the above-mentioned voice coil.

After adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

Since the voice coil of the utility model is wound by a voice coil wire with a rectangular cross-section, the ratio of the long side size to the short side size of the rectangular voice coil wire is π-4π, and the extension direction of the long side of the rectangular voice coil wire Consistent with the width direction of the voice coil. The ratio of the long side size to the short side size of the voice coil wire is π~4π, which makes it easier to distinguish the long side and the short side of the voice coil wire, and the phenomenon of wire rotation will not occur during the winding process of the voice coil, reducing the winding time. The difficulty of manufacturing; and the width of the voice coil is formed by the long side of the voice coil wire, the number of layers of the voice coil wire of the voice coil can be reduced from the existing four layers to two layers or one layer, which further reduces the difficulty of winding and improves The efficiency of voice coil winding is improved, and the bonding force between adjacent voice coil wires is greater. At the same time, the gap between adjacent voice coil lines is small, and the volume ratio of the voice coil is high, which can make full use of the magnetic field strength occupied by the entire voice coil, which can greatly improve the sensitivity of the speaker; and the heat dissipation performance of the voice coil is better; You can also flexibly adjust the height and width of the voice coil by adjusting the ratio of the long side to the short side of the rectangular voice coil wire. While flexibly improving the THD of the speaker, it will not affect the width of the voice coil and 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 wire is π, the voice coil wire with a rectangular cross section can obtain a circular voice coil wire with the same diameter as the short side dimension of the rectangular voice coil wire Consistent cross-sectional area, under the same voice coil resistance, the rectangular voice coil wire has fewer winding layers, which makes the voice coil design easier and less difficult to wind. Simultaneously when the ratio of the long side dimension and the short side dimension of the voice coil line is π, the ratio of the long side dimension and the short side dimension of the voice coil line in the utility model and the prior art is 4/π, and the voice coil The length of the long side of the line is compared with the voice coil wire whose short side size is 2 times that of the voice coil wire in the utility model. Under the same voice coil resistance value, the two will have the same voice coil wire length, voice coil height and voice coil height. The weight of the coil can achieve the same acoustic performance, but the utility model does not rotate the voice coil wire during the winding process of the voice coil, and 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 wire is 4π, the voice coil wire with a rectangular cross section can obtain a circular voice coil whose diameter is twice the short side dimension of the rectangular voice coil wire The cross-sectional area of the wire is consistent. Under the same resistance value of the voice coil, the rectangular voice coil wire has fewer winding layers, which makes the design of the voice coil easier and less difficult to wind.

Since the voice coil of the loudspeaker of the present invention is the above-mentioned voice coil, the winding difficulty of the voice coil is low, and the winding efficiency is high. While ensuring the strong magnetic field strength obtained by the voice coil and improving the sensitivity, the voice coil can be more easily adjusted. The height and width are adjusted to ensure the THD of the product.

To sum up, the voice coil of the utility model and the loudspeaker equipped with the voice coil solve the technical problems such as difficulty in winding the voice coil in the prior art, and the voice coil of the utility model and the speaker equipped with the voice coil Low winding difficulty, high winding efficiency, high speaker sensitivity, low harmonic distortion, and good acoustic performance.

Description of drawings

FIG. 1 is a schematic diagram of the voice coil wire rotation phenomenon in the voice coil winding process in the prior art;

Fig. 2 is a structural schematic diagram of a voice coil in the prior art;

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

Fig. 4 is the structural representation of the second voice coil of the utility model embodiment;

Fig. 5 is the structural representation of three voice coils of the utility model embodiment;

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

Detailed ways

Below in conjunction with accompanying drawing and embodiment, further set forth the utility model.

Embodiment one:

As shown in FIG. 3 , a voice coil, the voice coil 10b is wound by a voice coil wire 12b, and the cross section of the voice coil wire 12b is rectangular. The extension direction of the long side of the voice coil wire 12b is consistent with the width direction of the voice coil 10b, that is, the width W' of the voice coil 10b is formed by the long side of the voice coil wire 12b, and the height H' of the voice coil 10b is determined by the width of the voice coil wire 12b. short side composition. Let the length (long side dimension) of the rectangular voice coil wire be A', the width (short side size) be B', the ratio of the long side size to the short side size of the voice coil wire 10b is π～4π, namely A'/B '=π∼4π, and in this embodiment, A'/B'=π is preferred. When A'/B'=π, the voice coil wire 12b can obtain the same cross-sectional area as the voice coil wire whose diameter is B' and the cross-section is circular. Under the same resistance value of the voice coil, the voice coil 10b has fewer winding layers, which makes the design of the voice coil easier and less difficult to wind. At the same time, compared with the voice coil wire of A/B=4/π, A=2B' (as shown in Figure 2) in the prior art, under the same voice coil resistance, the two will have the same voice coil The wire length, voice coil height and 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, which makes winding easier and higher winding efficiency.

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

As shown in FIG. 3 , the voice coil wire 12 b is an enameled wire, including a strip-shaped metal core inside for conducting electricity and an insulating layer wrapped around the metal core.

Embodiment two:

As shown in Figure 4, this embodiment is basically the same as Embodiment 1, the difference is that:

Voice coil 10c is wound by voice coil wire 12c, and the extension direction of the long side of voice coil wire 12c is consistent with the width direction of voice coil 10c, namely the width W " of voice coil 10c is formed by the long side of voice coil wire 12c, The height H″ of the voice coil 10c is formed by the short side of the voice coil wire 12c, and the ratio of the long side size to the short side size of the voice coil wire is 4π, that is, A″/B″=4π. The width W″ of the voice coil 10c is equal to the dimension A′ of the long side of the voice coil wire 12c, that is, the voice coil 10c is wound by one or two layers of voice coil wire 12c.

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

Embodiment three:

As shown in Figure 5, this embodiment is basically the same as Embodiment 1 and Embodiment 2, the difference is that:

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

The setting of the arc chamfering can ensure that the outer glue layer of the voice coil wire is evenly coated, and the adjacent voice coil wires are firmly bonded, and at the same time, it can also increase the appearance of the voice coil.

This embodiment only provides the drawings of the embodiment that is basically the same as that of Embodiment 2, because the drawings of the embodiment that is basically the same as that of Embodiment 1 can be drawn by a technician without creative work according to Fig. 3 and Fig. 5 , so the drawings of the implementation manner basically the same as the first embodiment are omitted here.

Embodiment four:

A loudspeaker includes a vibrating system and a magnetic circuit system, and the vibrating system includes a vibrating membrane and a voice coil combined together. The voice coil is the voice coil described in Embodiment 1, Embodiment 2 and Embodiment 3.

Because the loudspeaker of the utility model adopts the voice coil described in Embodiment 1, Embodiment 2 and Embodiment 3, the winding difficulty of the voice coil is low, and the winding efficiency is high, and the stronger magnetic field intensity obtained by 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 utility model is not limited to the above-mentioned specific implementation manners, and various transformations made by those skilled in the art starting from the above-mentioned ideas without creative work all fall within the protection scope of the utility model.

Claims (9)

1. The voice coil is formed by winding a voice coil wire, the cross section of the voice coil wire is rectangular, and it is characterized in that the ratio of the long side size to the short side size of the rectangular voice coil wire is π～4π, And the extending direction of the long side of the rectangular voice coil wire is consistent with the width direction of the voice coil. 2 . The voice coil according to claim 1 , wherein the ratio of the dimension of the long side to the dimension of the short side of the rectangular voice coil wire is π. 3. The voice coil according to claim 2, wherein the width of the voice coil is twice the length of the long side of the rectangular voice coil wire. 4. The voice coil according to claim 1, wherein the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 4π. 5. The voice coil according to claim 4, wherein the width of the voice coil is equal to the dimension of the long side of the rectangular voice coil wire. 6. The voice coil according to any one of claims 1 to 5, wherein the four corners of the rectangular voice coil wire are all provided with arc chamfers. 7. The voice coil according to claim 6, characterized in that, the radius of the arc chamfer is less than or equal to 1/2 of the short side dimension of the rectangular voice coil wire. 8. The voice coil according to claim 1, wherein the voice coil wire is enameled wire. 9. A loudspeaker comprising a vibration system and a magnetic circuit system, the vibration system comprising a combined diaphragm and a voice coil, characterized in that the voice coil is the voice coil according to any one of claims 1 to 8.