CN204498361U - 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 kind of voice coil loudspeaker voice coil and be provided with the loud speaker of this voice coil loudspeaker voice coil, relate to electro-acoustic product technical field, formed by voice coil line coiling, the cross section of described voice coil line is rectangle, four bights of described rectangular voice coil line are equipped with circular arc chamfering, the long limit size of described rectangular voice coil line and the ratio of short side dimension are 1.05 ~ 3.15, and the bearing of trend on the long limit of described rectangular voice coil line is consistent with the short transverse of described voice coil loudspeaker voice coil.The utility model voice coil loudspeaker voice coil and the loud speaker being provided with this voice coil loudspeaker voice coil solve the technical problems such as voice coil loudspeaker voice coil plot ratio in prior art is low, the utility model voice coil loudspeaker voice coil and be provided with this voice coil loudspeaker voice coil loud speaker in voice coil loudspeaker voice coil plot ratio high, loudspeaker sensitivity is high, and harmonic distortion is little, and acoustical behavior is good.

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. The existing voice coil is usually wound by a voice coil wire with a circular cross-section, and its structure is shown in Figure 1. The voice coil 10a is wound by a voice coil wire 12a with a circular cross-section. After the voice coil is wound and formed, there are large gaps between the adjacent voice coil wires 12a, so that the voice coil cannot fully utilize the energy of the magnetic field, and the volume ratio of the voice coil is low, resulting in poor sensitivity of the speaker and poor voice coil performance. Poor heat dissipation, etc.

In view of the above problems, 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 increase the volume ratio of the voice coil to a certain extent and improve heat dissipation. ability, 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 has certain limitations for simultaneously adjusting sensitivity and THD (Total Harmonic Distortion, harmonic distortion) 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) requires that the voice coil wire with a square cross section must have a larger side length, but the side length increases Larger will also increase the width of the voice coil at the same time, thereby increasing the magnetic gap and reducing the sensitivity of the product.

Utility model content

In view of the above defects, the first technical problem to be solved by the utility model is to provide a voice coil, the gap between adjacent voice coil wires of this voice coil is small, the volume ratio of the voice coil is high, and the heat dissipation performance is good. 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 loudspeaker with high sensitivity and easier adjustment of the acoustic properties such as THD of the product.

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 four corners of the rectangular voice coil wire are provided with arc chamfers, the rectangular voice coil wire The ratio of the long side dimension to the short side dimension is 1.05-3.15, and the extending direction of the long side of the rectangular voice coil wire is consistent with the height direction of the voice coil.

As an implementation manner, the radius of the arc chamfer is less than 1/2 of the length of the short side.

Wherein, the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 4/π.

As another implementation manner, the radius of the arc chamfer is equal to 1/2 of the length of the short side.

Wherein, the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 1.25˜3.15.

Wherein, the long side dimension of the rectangular voice coil wire is 0.02mm˜1mm.

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, and the four corners of the rectangular voice coil wire are provided with arc chamfers, the dimensions of the long side and the short side of the rectangular voice coil wire The ratio of is 1.05 to 3.15, and the extending direction of the long side of the rectangular voice coil wire is consistent with the height direction of the voice coil. After the voice coil is made of a rectangular voice coil wire, the gap between adjacent voice coil wires 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, which can greatly improve The sensitivity of the speaker; and the heat dissipation performance of the voice coil is better. At the same time, the cross-section of the voice coil wire is rectangular, and 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 wire. While flexibly improving the THD of the speaker, it will not affect the voice coil Width, without affecting the width of the magnetic gap, 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 4/π, the voice coil wire with a rectangular cross section can obtain a circular sound with the same diameter as the long side dimension of the rectangular voice coil wire. The cross-sectional area of the coil wire is consistent. Under the same resistance value of the voice coil, the voice coil wire with a rectangular cross-section and a circular cross-section can obtain the same length, and the height of the wound voice coil is also the same. The same The length of the voice coil wire and the height of the voice coil can ensure that the harmonic distortion performance of the speaker will not deteriorate when changing from a voice coil wire with a circular cross-section to a voice coil wire with a rectangular cross-section. The THD performance of the speaker also has a smaller voice coil width, thereby obtaining a smaller magnetic gap width, thereby increasing the magnetic field energy acting on the voice coil, making the speaker more sensitive.

Since the voice coil of the loudspeaker of the utility model is the above-mentioned voice coil, the height and width of the voice coil can be adjusted more easily while ensuring the strong magnetic field intensity obtained by the voice coil and improving the sensitivity, thereby ensuring the THD of the product.

In summary, the voice coil of the utility model and the loudspeaker provided with the voice coil solve the technical problems of the low volume ratio of the voice coil in the prior art, and the voice coil volume of the voice coil of the utility model and the speaker provided with the voice coil High efficiency, high speaker sensitivity, small harmonic distortion, and good acoustic performance.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a voice coil in the prior art;

Fig. 2 is a schematic cross-sectional structure diagram of Embodiment 1 of the voice coil of the present invention;

Fig. 3 is a schematic diagram of the cross-sectional structure of the voice coil wire in Fig. 2;

Fig. 4 is a schematic cross-sectional structure diagram of Embodiment 2 of the voice coil of the present invention;

Fig. 5 is a cross-sectional schematic diagram of the voice coil wire in Fig. 4;

In the figure: 10a, voice coil, 10b, voice coil, 10c, voice coil, 12a, voice coil wire, 12b, voice coil wire, 12c, voice coil wire, 120, insulating layer, 122, metal core.

Detailed ways

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

Embodiment one:

As shown in Fig. 2 and Fig. 3 together, a kind of voice coil, the voice coil 10b is made by winding the voice coil wire 12b, the cross section of the voice coil wire 12b is rectangular, and the four corners of the rectangular voice coil wire are provided with Arc chamfering, the radius of the arc chamfering is less than 1/2 of the length of the short side of the rectangle, the arc chamfering can ensure that the outer glue layer of the voice coil wire 12b is evenly coated, and the adjacent voice coil wires 12b are bonded It is firm, and at the same time, it can also increase the appearance of the voice coil 10b.

As shown in Figures 2 and 3 together, the extending direction of the long side of the rectangular voice coil line is consistent with the height direction of the voice coil 10b, assuming that the length (long side dimension) of the rectangular voice coil line is b, and the width (short side dimension) is a, and the ratio of the long side size to the short side size of the rectangular voice coil wire is 1.05~3.15, that is, b/a=1.05~3.15. According to the size and type of the speaker, the long side size b of the rectangular voice coil wire is taken as The value range is 0.02mm～1mm. This embodiment is preferably b/a=4/π, where π=3.1415926. When b/a=4/π, the voice coil wire with a rectangular cross section can obtain the same cross-sectional area as the voice coil wire whose diameter is the same as that of the long side of the rectangular voice coil wire. Under the coil resistance value, the voice coil wire with a rectangular cross-section and a circular cross-section can have the same length, and the height of the wound voice coil is also the same. The same voice coil wire length and voice coil height can ensure the loudspeaker The THD performance does not deteriorate when changing from a voice coil wire with a circular cross-section to a voice coil wire with a rectangular cross-section. And at this time, the dimension a of the short side of the rectangular voice coil wire is only 0.785 times the dimension b of the long side (the diameter of the circular voice coil wire), so the width of the voice coil wound by a voice coil wire with a rectangular cross section is only The width of the voice coil wound by the circular voice coil wire is 0.75-0.8 times, which can obtain a smaller magnetic gap, thereby improving the sensitivity of the speaker. Therefore, the voice coil wire with a rectangular cross section has a smaller voice coil width while ensuring the THD performance of the speaker, so as to obtain a smaller magnetic gap width, thereby increasing the magnetic field energy acting on the voice coil, so that the speaker has a higher sensitivity.

As shown in FIG. 3 , the voice coil wire 12 b is an enameled wire, including a strip-shaped metal core 122 inside for conducting electricity, and an insulating layer 120 is wrapped around the metal core 122 .

The utility model adopts a voice coil wire with a rectangular cross section to wind the voice coil, which not only increases the volume ratio of the voice coil, improves the utilization rate of the magnetic field, and enhances the heat dissipation effect of the voice coil, but also can adjust the voice coil wire The aspect ratio can flexibly adjust the height and width of the voice coil. While flexibly improving the THD of the speaker, it will not increase the width of the voice coil or the width of the magnetic gap, which greatly improves the acoustic performance of the speaker.

Embodiment two:

As shown in Figure 4 and Figure 5 together, this embodiment is basically the same as Embodiment 1, the difference is that:

The voice coil 10c is wound by a voice coil wire 12c with a rectangular cross section. The radius of the circular chamfer of the voice coil wire 12c is equal to 1/2 of the length of its short side. At this time, the cross section of the voice coil wire 12c is approximately runway shape.

Let b be the length (long side dimension of the rectangle) of the racetrack-shaped section, and a be the width (short side dimension of the rectangle). In this embodiment, b/a=1.25 to 3.15 is preferable.

Embodiment three:

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 and Embodiment 2.

Since the loudspeaker of the utility model adopts the voice coil described in Embodiment 1 and Embodiment 2, the height and width of the voice coil can be adjusted more easily while ensuring the strong magnetic field strength obtained by the voice coil and improving the sensitivity , 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 (8)

1. The voice coil is formed by winding a voice coil wire. It is characterized in that the cross section of the voice coil wire is rectangular, and the four corners of the rectangular voice coil wire are provided with arc chamfers. The ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 1.05-3.15, and the extending direction of the long side of the rectangular voice coil wire is consistent with the height direction of the voice coil. 2 . The voice coil according to claim 1 , wherein the radius of the arc chamfer is less than 1/2 of the length of the short side. 3. The voice coil according to claim 2, wherein the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 4/π. 4. The voice coil according to claim 1, wherein the radius of the arc chamfer is equal to 1/2 of the length of the short side. 5 . The voice coil according to claim 4 , wherein the ratio of the long side dimension to the short side dimension of the rectangular voice coil wire is 1.25-3.15. 6 . The voice coil according to any one of claims 1 to 5 , wherein the length of the long side of the rectangular voice coil wire is 0.02mm˜1mm. 7. The voice coil according to claim 1, wherein the voice coil wire is an enameled wire. 8. 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 7.