CN207283806U - Loudspeaker - Google Patents

Abstract

Disclosed is a loudspeaker, by arranging a plurality of sound outlets around the central axis of the magnetic circuit system on the loudspeaker and adding a voice coil on the diaphragm, the nonlinear characteristics of the loudspeaker can be reduced, the total harmonic distortion of the loudspeaker can be suppressed, and at the same time The sensitivity of the speaker can be improved.

Description

speaker

technical field

The utility model relates to the field of multimedia electronic devices, in particular to a loudspeaker.

Background technique

Patent CN203775399U proposes a horn driven by a balanced magnet. The loudspeaker is also called "speaker", and is provided with upper and lower ring magnets, and a voice coil is set in the middle of the upper and lower ring magnets. This patent improves the magnetic field distribution characteristics of the traditional speaker. The magnetic field of the traditional speaker is the largest magnetic induction at the balance position of the voice coil, and the smallest magnetic induction at the maximum vibration position of the voice coil. On the contrary, the magnetic induction at the balance position of the voice coil is the smallest, and the magnetic induction at the maximum vibration position Maximum strength. According to the formula F=I*B*L (F is the driving force, I is the current, B is the magnetic induction intensity, and L is the length of the voice coil), it can be known that the driving force F of the traditional speaker decreases with the increase of the B value as the voice coil displacement increases. Small changes lead to non-linear behavior, which ultimately increases the total harmonic distortion (THD) of the loudspeaker product. The magnetic field distribution characteristics of this patented speaker are opposite to those of traditional speakers, which reduces the nonlinear characteristics of the speaker and suppresses total harmonic distortion.

However, due to the magnetic field distribution near the through hole of the ring magnet of this patent, the magnetic induction intensity near the voice coil is weakened, and the sensitivity of the speaker is reduced. Therefore, compared with the traditional speaker, the sensitivity has not been improved accordingly, and there is no advantage in sensitivity. .

Utility model content

In view of this, the present disclosure provides a loudspeaker, which can reduce the nonlinear characteristics of the loudspeaker, suppress the total harmonic distortion of the loudspeaker, and can also improve the sensitivity of the loudspeaker.

The present disclosure provides a speaker, including:

The magnetic circuit system forms a static magnetic field;

a vibration system, including a diaphragm and a first voice coil, arranged in the static magnetic field;

The first frame and the second frame are suitable for fixing the magnetic circuit system and the vibration system;

Wherein, the loudspeaker is formed with a plurality of sound outlets, and the plurality of sound outlets are arranged around the central axis of the magnetic circuit system.

Preferably, the first frame and the second frame are arranged opposite to each other, wherein the inner sides of the first frame and the second frame are each provided with a cross section formed by sequentially connecting a plurality of circular arcs. The inner wall of the through hole is fixedly connected with the magnetic circuit system to form a plurality of independent sound outlets.

Preferably, the magnetic circuit system includes:

The first multi-pole magnet is fixedly connected with the first frame to form a plurality of sound holes;

The second multi-pole magnet is fixedly connected with the second frame to form a plurality of sound outlets;

Wherein, the vibration system is arranged between the first multi-pole magnet and the second multi-pole magnet.

Preferably, the magnetic circuit system includes:

a first magnet and a first magnetic cup, the first magnet is fixed in the first magnetic cup to form a first magnetic circuit module;

a second magnet and a second magnetic bowl, the second magnet is fixed in the second magnetic bowl to form a second magnetic circuit module;

Wherein, the first magnetic circuit module and the second magnetic circuit module are respectively fixed in the first frame and the second frame, and the vibration system is arranged on the first magnetic circuit module and the second frame. between the second magnetic circuit modules.

Preferably, the magnetic circuit system includes:

a third magnet and a third magnetic cup, the third magnet is fixed in the third magnetic cup to form a third magnetic circuit module;

a fourth magnet and a fourth magnetic cup, the fourth magnet is fixed in the fourth magnetic cup to form a fourth magnetic circuit module;

Wherein, the bottoms of the third magnetic bowl and the fourth magnetic bowl are provided with a plurality of sound holes, and the third magnet and the fourth magnet are connected to the third magnetic bowl and the fourth magnetic bowl. An annular gap is formed, and the annular gap communicates with the plurality of sound outlets.

Preferably, the third magnetic circuit module and the fourth magnetic circuit module are respectively fixed in the first frame and the second frame, and the vibration system is arranged between the third magnetic circuit module and the second frame. between the fourth magnetic circuit modules.

Preferably, the speaker also includes:

The second voice coil is arranged on the diaphragm and forms an annular space with the first voice coil;

The third pot frame, including the positive electrode and the negative electrode;

Wherein, the first multipole magnet is provided with a first through hole, and the second multipole magnet is provided with a second through hole, and the third frame is arranged in the second through hole, through which the positive and negative electrodes It is electrically connected with the first voice coil and the second voice coil so that the driving forces of the first voice coil and the second voice coil are superimposed.

Preferably, the speaker also includes:

The second voice coil is arranged on the diaphragm and forms an annular space with the first voice coil;

The third pot frame, including the positive electrode and the negative electrode;

Wherein, the first magnetic circuit module is provided with a first through hole, the second magnetic circuit module is provided with a second through hole, the third frame is provided in the second through hole, and the positive and negative electrodes pass through the second through hole. It is electrically connected with the first voice coil and the second voice coil so that the driving forces of the first voice coil and the second voice coil are superimposed.

Preferably, the speaker also includes:

The second voice coil is arranged on the diaphragm and forms an annular space with the first voice coil;

The third pot frame, including the positive electrode and the negative electrode;

Wherein, the third magnetic circuit module is provided with a first through hole, the fourth magnetic circuit module is provided with a second through hole, the third frame is provided in the second through hole, and the positive and negative electrodes pass through the second through hole. It is electrically connected with the first voice coil and the second voice coil so that the driving forces of the first voice coil and the second voice coil are superimposed.

Preferably, the diaphragm includes:

a first surround, concentric with the center of the diaphragm;

a second ring concentric with the first ring to form a ring structure; and,

The dome is arranged on the vibrating membrane surrounded by the second ring to expand the high-frequency frequency response.

Preferably, the first voice coil is disposed between the first surround and the second surround, and the second voice coil is disposed between the second surround and the dome, so that It is suitable for independent vibration of the first voice coil and the second voice coil.

The present disclosure provides a loudspeaker, which can reduce the nonlinear characteristics of the loudspeaker and suppress the total harmonic distortion of the loudspeaker by arranging a plurality of sound outlets around the central axis of the magnetic circuit system on the loudspeaker and adding a voice coil on the diaphragm. It can also increase the sensitivity of the speaker.

Description of drawings

Through the following description of the embodiments of the utility model with reference to the accompanying drawings, the above-mentioned and other purposes, features and advantages of the utility model will be more clear, in the accompanying drawings:

Fig. 1 is a schematic diagram of the explosion of the loudspeaker of the first embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view of the loudspeaker of the first embodiment of the present invention;

3 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in the first embodiment of the present invention;

Fig. 4 is a schematic diagram of the distribution of magnetic induction near the voice coil in the first embodiment of the present invention;

Fig. 5 is a schematic diagram showing the magnetic induction intensity of the loudspeaker in the first embodiment of the present invention and the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil;

Fig. 6 is a schematic explosion diagram of the loudspeaker of the second embodiment of the present invention;

Fig. 7 is a schematic cross-sectional view of a loudspeaker according to a second embodiment of the present invention;

Fig. 8 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in the second embodiment of the present invention;

9 is a schematic diagram of the distribution of magnetic induction near the voice coil in the second embodiment of the present invention;

Fig. 10 is a schematic diagram showing the magnetic induction of the loudspeaker according to the second embodiment of the present invention and the magnetic induction of the traditional loudspeaker changing with the position of the voice coil;

Fig. 11 is a schematic explosion diagram of the loudspeaker according to the third embodiment of the present invention;

Fig. 12 is a schematic cross-sectional view of a speaker according to a third embodiment of the present invention;

Fig. 13 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in the third embodiment of the present invention;

Fig. 14 is a schematic diagram of the distribution of magnetic induction near the voice coil in the third embodiment of the present invention;

Fig. 15 is a schematic diagram showing the magnetic induction intensity of the loudspeaker according to the third embodiment of the present invention and the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil;

Fig. 16 is a schematic diagram showing the magnetic induction of the loudspeaker of the first embodiment, the second embodiment and the third embodiment of the present invention and the magnetic induction of the traditional loudspeaker changing with the position of the voice coil;

Fig. 17 is a schematic explosion diagram of the loudspeaker of the fourth embodiment of the present invention;

Fig. 18 is a schematic cross-sectional view of a loudspeaker according to a fourth embodiment of the present invention;

Fig. 19 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in the fourth embodiment of the present invention;

Fig. 20 is a schematic diagram of the distribution of magnetic induction near the voice coil in the fourth embodiment of the present invention;

Fig. 21 is a schematic diagram showing the magnetic induction intensity of the loudspeaker according to the fourth embodiment of the present invention and the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil;

Fig. 22 is a schematic explosion diagram of the loudspeaker of the fifth embodiment of the present invention;

Fig. 23 is a schematic cross-sectional view of a loudspeaker according to a fifth embodiment of the present invention;

Fig. 24 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in the fifth embodiment of the present invention;

Fig. 25 is a schematic diagram of the distribution of magnetic induction near the voice coil in the fifth embodiment of the present invention;

Fig. 26 is a schematic diagram showing the magnetic induction intensity of the loudspeaker according to the fifth embodiment of the present invention and the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil;

Fig. 27 is a schematic cross-sectional view of the speaker of the sixth embodiment of the present invention;

Fig. 28 is a schematic cross-sectional view of a loudspeaker according to a seventh embodiment of the present invention;

Fig. 29 is a schematic cross-sectional view of the speaker of the eighth embodiment of the present invention;

Fig. 30 is a schematic structural view of the diaphragm of the fourth, fifth, sixth and eighth embodiments of the present invention.

Detailed ways

The utility model is described below based on examples, but the utility model is not limited to these examples. In the following detailed description of the present utility model, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these detailed parts. In order to avoid obscuring the essence of the present invention, well-known methods, procedures, processes, components and circuits have not been described in detail.

Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

In the description of the present utility model, it should be understood that the terms "first", "second" and so on are only used for descriptive purposes, and should not be understood as indicating or implying relative importance. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

Unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral body; It may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an internal communication between two elements or an interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Embodiment one:

FIG. 1 and FIG. 2 are structural schematic diagrams of the loudspeaker of this embodiment. As shown in the figure, the loudspeaker includes a magnetic circuit system A, a vibration system B, a first pot frame C and a second pot frame D. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The first frame C, the second frame D and the magnetic circuit system A are fixed to each other to form a plurality of sound holes E arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The inner sides of the first frame C and the second frame D are provided with through holes whose cross-sections are sequentially connected by multiple arcs, and the arc-shaped inner walls of the through holes are fixedly connected with the magnetic circuit system A to form a plurality of independent Sound hole E. A plurality of sound holes E are arranged around the central axis of the magnetic circuit system A. The vibration system B emits sound along the sound hole E. In this embodiment, the first frame C and the second frame D have the same structure, so the size and number of the sound holes on the front and back of the speaker are the same. Preferably, the performance of the loudspeaker can be optimized by changing the size or number of the sound holes of one of the basin frames.

The magnetic circuit system A comprises a first multipole magnet 1 and a second multipole magnet 2 . The first multi-pole magnet 1 is fixed on the inner wall of the first frame C by bonding, and forms a plurality of sound holes E with the inner wall of the first frame C. The second multi-pole magnet 2 is fixed on the inner wall of the second frame D by bonding, and forms a plurality of sound holes E with the inner wall of the second frame D. The first multipole magnet 1 and the second multipole magnet 2 are arranged oppositely, and a static magnetic field is formed between them. Both the first multipole magnet 1 and the second multipole magnet 2 are formed by magnetizing a magnet in different regions. The first multipole magnet 1 comprises a first multipole magnet inner region 11 and a first multipole magnet outer region 12 . The second multipole magnet 2 comprises a second multipole magnet inner region 21 and a second multipole magnet outer region 22 . Wherein, the magnetization direction of the first multipole magnet inner region 11 and the first multipole magnet outer region 12 are opposite; the second multipole magnet inner region 21 and the second multipole magnet outer region 22 magnetization directions are opposite; the first multipole magnet The magnetization directions of the inner region 11 of the magnet and the inner region 21 of the second multipole magnet are opposite.

The vibration system B is set in the static magnetic field formed by the first multipole magnet 1 and the second multipole magnet 2 . The vibration system B includes a diaphragm 3 and a first voice coil 4 , and the first voice coil 4 is glued and fixed on the diaphragm 3 . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The winding width of the first voice coil 4 is wider than the winding height of the first voice coil 4 , and the cross-sectional shape is flat. The optional range of wire diameter of the first voice coil 4 is 0.02mm-0.1mm. The first voice coil 4 is placed in a static magnetic field, and after the first voice coil 4 is connected to an electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shapes of the first multi-pole magnet 1, the second multi-pole magnet 2 and the diaphragm 3 are the same as those of the loudspeaker, and may also be arranged in shapes such as a circle, a square or a racetrack according to different shapes of the loudspeaker. The first voice coil 4 is configured as a corresponding circular ring, square ring or racetrack ring. The inner regions 11, 21 of the first multipole magnet 1 and the second multipole magnet 2 have the same shape as the first multipole magnet 1 and the second multipole magnet 2, and the corresponding first multipole magnet 1 and the second multipole magnet The outer regions 12, 22 of the magnet 2 can be configured as corresponding circular rings, square rings or racetrack rings or the like. Preferably, the loudspeaker is set to a circle, the shapes of the first multipole magnet 1, the second multipole magnet 2, and the diaphragm 3 are set to a circle, the first voice coil 4 is circular, and the first multipole magnet 1 and The inner regions 11 , 21 of the second multipole magnet 2 are circular, and the outer regions 12 , 22 of the first multipole magnet 1 and the second multipole magnet 2 are circular.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the first voice coil 4 and the distribution results of the magnetic induction intensity near the first voice coil 4 through simulation. As shown in FIG. 3 and FIG. 4 , FIG. 3 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in this embodiment, and FIG. 4 is a schematic diagram of the distribution of magnetic induction near the voice coil in this embodiment. The area where the first voice coil 4 is located and the areas directly above and directly below the first voice coil 4 in FIG. . The direction of the magnetic field in this area is horizontal, and compared with the loudspeaker of the patent CN203775399U, the magnetic field is more concentrated. The direction of the current inside the first voice coil 4 is vertical to the plane of the paper. According to the left-hand rule, the first voice coil 4 will receive an upward or downward driving force when it is electrified in the static magnetic field. The first voice coil 4 is forced to vibrate up and down, driving the diaphragm 3 to vibrate and produce sound. In Figure 4, the black area represents the area with the highest magnetic induction intensity, and the gray area represents the area with relatively small magnetic induction intensity. The color changes from dark to light, indicating that the magnetic induction intensity changes from large to small. The size of the first voice coil 4 can be determined according to the distribution area of the magnetic induction. When the first voice coil 4 is energized and moves up and down, the magnetic induction intensity inside the first voice coil 4 changes, and the greater the amplitude, the greater the magnetic induction intensity.

Fig. 5 is a schematic diagram showing the magnetic induction of the loudspeaker in this embodiment and the magnetic induction of the conventional loudspeaker as a function of the position of the voice coil. In FIG. 5 , C1 is a curve of the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil, and C2 is a curve of the magnetic induction intensity of the loudspeaker of the present embodiment changing with the position of the voice coil. In Figure 5, the horizontal axis represents the position of the voice coil, 0 represents the rest position, a positive value represents the corresponding position of the upward vibration of the voice coil, and a negative value represents the corresponding position of the downward vibration of the voice coil; the vertical axis represents the value of the magnetic induction intensity. From the comparison of the two curves C1 and C2, it can be seen that the magnetic induction intensity of the first voice coil 4 in the rest position 0 in this embodiment is the smallest, and the greater the upward or downward amplitude of the first voice coil 4, the greater the magnetic induction intensity, while the traditional speaker is the opposite. The magnetic induction intensity at the 0 position of the voice coil static position is the largest, and the larger the amplitude of the voice coil, the smaller the magnetic induction intensity. The magnetic induction intensity of the first voice coil 4 in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which ultimately manifests as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction of the first voice coil 4 increases with the increase of the displacement of the first voice coil 4 in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

Embodiment two:

Fig. 6 and Fig. 7 are structural schematic diagrams of the loudspeaker of this embodiment. As shown in the figure, the loudspeaker includes a magnetic circuit system A, a vibration system B, a first pot frame C and a second pot frame D. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The first frame C, the second frame D and the magnetic circuit system A are fixed to each other to form a plurality of sound holes E arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The inner sides of the first frame C and the second frame D are provided with through holes whose cross-sections are sequentially connected by multiple arcs, and the arc-shaped inner walls of the through holes are fixedly connected with the magnetic circuit system A to form a plurality of independent Sound hole E. A plurality of sound holes E are arranged around the central axis of the magnetic circuit system A. The vibration system B emits sound along the sound hole E. In this embodiment, the first frame C and the second frame D have the same structure, so the size and number of the sound holes on the front and back of the speaker are the same. Preferably, the performance of the loudspeaker can be optimized by changing the size or number of the sound holes of one of the basin frames.

The magnetic circuit system A includes a first magnetic circuit module 5 and a second magnetic circuit module 6 . The first magnetic circuit module 5 is fixed on the inner wall of the first frame C by bonding, and forms a plurality of sound holes E with the inner wall of the first frame C. The second magnetic circuit module 6 is fixed on the inner wall of the second frame D by bonding, and forms a plurality of sound holes E with the inner wall of the second frame D. The first magnetic circuit module 5 and the second magnetic circuit module 6 are arranged oppositely, and a static magnetic field is formed between them. The first magnetic circuit module 5 includes a first magnet 51 and a first magnetic cup 52 . The second magnetic circuit module 6 includes a second magnet 61 and a second magnetic cup 62 . The first magnet 51 and the second magnet 61 are bonded in the first magnetic cup 52 and the second magnetic cup 62 respectively. The outer diameter of the magnet is equal to the inner diameter of the magnetic cup. After bonding, the magnet and the magnetic cup are closely attached. The first magnet 51 and the second magnet 61 are magnetized along the entire lengthwise direction of the magnets, and the magnetization directions of the first magnet 51 and the second magnet 61 are opposite. The first magnet 51 and the first magnetic cup 52 , the second magnet 61 and the second magnetic cup 62 jointly form a static magnetic field.

The vibration system B is set in the static magnetic field formed by the first magnetic circuit module 5 and the second magnetic circuit module 6 . The vibration system B includes a diaphragm 3 and a first voice coil 4 , and the first voice coil 4 is glued and fixed on the diaphragm 3 . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The winding width of the first voice coil 4 is wider than the winding height of the first voice coil 4 , and the cross-sectional shape is flat. The optional range of wire diameter of the first voice coil 4 is 0.02mm-0.1mm. The first voice coil 4 is placed in a static magnetic field, and after the first voice coil 4 is connected to an electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shapes of the first magnetic circuit module 5 , the second magnetic circuit module 6 and the diaphragm 3 are the same as those of the loudspeaker, and may also be set in a circular, square or racetrack shape according to different shapes of the loudspeaker. The first voice coil 4 is configured as a corresponding circular ring, square ring or racetrack ring. Preferably, the loudspeaker is set in a circular shape, the shapes of the first magnetic circuit module 5 , the second magnetic circuit module 6 and the diaphragm 3 are set in a circular shape, and the first voice coil 4 is set in a circular shape.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the first voice coil 4 and the distribution results of the magnetic induction intensity near the first voice coil 4 through simulation. As shown in FIG. 8 and FIG. 9 , FIG. 8 is a schematic diagram of the distribution of magnetic induction lines near the voice coil in this embodiment, and FIG. 9 is a schematic diagram of the distribution of magnetic induction near the voice coil in this embodiment. In FIG. 8 , the area where the first voice coil 4 is located and the areas directly above and directly below the first voice coil 4 are near the junctions between the first magnet 51 and the first magnetic cup 52 , and the second magnet 61 and the second magnetic cup 62 . The direction of the magnetic field lines in this area is horizontal, and compared with the loudspeaker of patent CN203775399U, the magnetic field is more concentrated. The direction of the current inside the first voice coil 4 is vertical to the plane of the paper. According to the left-hand rule, the first voice coil 4 will receive an upward or downward driving force when it is electrified in the static magnetic field. The first voice coil 4 is forced to vibrate up and down, driving the diaphragm 3 to vibrate and produce sound. In Figure 9, the black area represents the area with high magnetic induction intensity, and the gray area represents the area with relatively low magnetic induction intensity. The color changes from dark to light, indicating that the magnetic induction intensity changes from large to small. It can be seen from FIG. 9 that the magnetic induction intensity in the vertical upper and lower regions of the first voice coil 4 is stronger, and the region close to the magnetic circuit module is the strongest, and the middle region far away from the magnetic circuit module is weaker. The size of the first voice coil 4 can be determined according to the distribution area of the magnetic induction. When the first voice coil 4 is energized and moves up and down, the magnetic induction intensity inside the first voice coil 4 changes, and the greater the amplitude, the greater the magnetic induction intensity.

Fig. 10 is a schematic diagram showing the magnetic induction of the loudspeaker in this embodiment and the magnetic induction of the conventional loudspeaker as a function of the position of the voice coil. C1 in FIG. 10 is the curve of the magnetic induction intensity of the conventional speaker changing with the position of the voice coil, and C4 is the curve of the magnetic induction intensity of the speaker of the present embodiment varying with the position of the voice coil. In Figure 10, the horizontal axis represents the position of the voice coil, 0 represents the static position, positive values represent the corresponding position of the voice coil upward vibration, and negative values represent the corresponding downward vibration of the voice coil; the vertical axis represents the value of the magnetic induction intensity. From the comparison of the two curves C1 and C4, it can be seen that the magnetic induction intensity of the first voice coil 4 in the rest position 0 in this embodiment is the smallest, and the greater the upward or downward amplitude of the first voice coil 4, the greater the magnetic induction intensity, while the traditional speaker is the opposite. The magnetic induction intensity at the 0 position of the voice coil static position is the largest, and the larger the amplitude of the voice coil, the smaller the magnetic induction intensity. The magnetic induction intensity of the first voice coil 4 in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which ultimately manifests as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction of the first voice coil 4 increases with the increase of the displacement of the first voice coil 4 in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

Embodiment three:

Fig. 11 and Fig. 12 are structural schematic diagrams of the loudspeaker of this embodiment. As shown in the figure, the loudspeaker includes a magnetic circuit system A, a vibration system B, a first pot frame C and a second pot frame D. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The magnetic circuit system A is provided with a plurality of sound holes E arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The insides of the first frame C and the second frame D are both configured as cylindrical through holes.

The magnetic circuit system A includes a third magnetic circuit module 7 and a fourth magnetic circuit module 8 . The external dimensions of the third magnetic circuit module 7 and the fourth magnetic circuit module 8 are adapted to the size of the cylindrical through hole of the frame. The third magnetic circuit module 7 is fixed in the cylindrical through hole of the first frame C by bonding. The fourth magnetic circuit module 8 is fixed in the cylindrical through hole of the second frame D by bonding. The third magnetic circuit module 7 and the fourth magnetic circuit module 8 are arranged oppositely, and a static magnetic field is formed between them. The third magnetic circuit module 7 includes a third magnet 71 and a third magnetic cup 72 . The fourth magnetic circuit module 8 includes a fourth magnet 81 and a fourth magnetic cup 82 . The bottoms of the third magnetic bowl 72 and the fourth magnetic bowl 82 are both provided with a plurality of cylindrical sound holes E. A plurality of sound holes E are arranged around the center of the magnetic bowl. The third magnet 71 is fixed in the third magnetic bowl 72 , forms an annular gap with the third magnetic bowl 72 , and the annular gap communicates with the sound hole E at the bottom of the third magnetic bowl 72 . The fourth magnet 81 is fixed in the fourth magnetic bowl 82 , forms an annular gap with the fourth magnetic bowl 82 , and the annular gap communicates with the sound hole E at the bottom of the fourth magnetic bowl 82 . The third magnet 71 and the fourth magnet 81 are magnetized along the entire lengthwise direction of the magnets, and the magnetization directions of the third magnet 71 and the fourth magnet 81 are opposite. The third magnet 71 and the third magnetic bowl 72 , the fourth magnet 81 and the fourth magnetic bowl 82 jointly form a static magnetic field. The vibration system B is set in the static magnetic field, and the sound generated by the vibration of the vibration system B is transmitted through the annular gap and the sound hole E. The structure of the third magnetic bowl 72 is the same as that of the fourth magnetic bowl 82, so the size and number of sound outlets on the front and back of the speaker are the same. Preferably, the performance of the speaker can be optimized by changing the size or quantity of the sound hole of one of the magnetic bowls.

The vibration system B is set in the static magnetic field formed by the third magnetic circuit module 7 and the fourth magnetic circuit module 8 . The vibration system B includes a diaphragm 3 and a first voice coil 4 , and the first voice coil 4 is glued and fixed on the diaphragm 3 . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The winding width of the first voice coil 4 is wider than the winding height of the first voice coil 4 , and the cross-sectional shape is flat. The optional range of wire diameter of the first voice coil 4 is 0.02mm-0.1mm. The first voice coil 4 is placed in a static magnetic field, and after the first voice coil 4 is connected to an electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shapes of the third magnetic circuit module 7 , the fourth magnetic circuit module 8 and the diaphragm 3 are the same as those of the loudspeaker, and may also be set in a circular, square or racetrack shape according to different shapes of the loudspeaker. The first voice coil 4 is configured as a corresponding circular ring, square ring or racetrack ring. Preferably, the loudspeaker is set in a circular shape, the shapes of the third magnetic circuit module 7 , the fourth magnetic circuit module 8 and the diaphragm 3 are set in a circular shape, and the first voice coil 4 is set in a circular shape.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the first voice coil 4 and the distribution results of the magnetic induction intensity near the first voice coil 4 through simulation. As shown in FIG. 13 and FIG. 14 , FIG. 13 is a schematic diagram of the distribution of magnetic induction lines near the voice coil of this embodiment, and FIG. 14 is a schematic diagram of the distribution of magnetic induction near the voice coil of this embodiment. The area where the first voice coil 4 is located and the areas directly above and directly below the first voice coil 4 in FIG. 13 are near the borders of the third magnet 71 and the third magnetic cup 72 , and the fourth magnet 81 and the fourth magnetic cup 82 . The direction of the magnetic field lines in this area is horizontal, and compared with the loudspeaker of patent CN203775399U, the magnetic field is more concentrated. The direction of the current inside the first voice coil 4 is vertical to the plane of the paper. According to the left-hand rule, the first voice coil 4 will receive an upward or downward driving force when it is electrified in the static magnetic field. The first voice coil 4 is forced to vibrate up and down, driving the diaphragm 3 to vibrate and produce sound. In Figure 14, the black area represents the area with high magnetic induction intensity, and the gray area represents the area with relatively low magnetic induction intensity. The color changes from dark to light, indicating that the magnetic induction intensity changes from large to small. It can be seen from FIG. 14 that the magnetic induction intensity in the vertical upper and lower regions of the first voice coil 4 is stronger, and the region close to the magnetic circuit module is the strongest, and the middle region far away from the magnetic circuit module is weaker. The size of the first voice coil 4 can be determined according to the distribution area of the magnetic induction. When the first voice coil 4 is energized and moves up and down, the magnetic induction intensity inside the first voice coil 4 changes, and the greater the amplitude, the greater the magnetic induction intensity.

Fig. 15 is a schematic diagram showing the magnetic induction of the loudspeaker in this embodiment and the magnetic induction of the traditional loudspeaker changing with the position of the voice coil. C1 in FIG. 15 is the curve of the magnetic induction intensity of the traditional speaker changing with the position of the voice coil, and C3 is the curve of the magnetic induction intensity of the speaker of the present embodiment changing with the position of the voice coil. In Figure 15, the horizontal axis represents the position of the voice coil, 0 represents the static position, positive values represent the corresponding position of the voice coil upward vibration, and negative values represent the corresponding position of the voice coil downward vibration; the vertical axis represents the value of the magnetic induction intensity. From the comparison of the two curves C1 and C3, it can be seen that the magnetic induction intensity of the first voice coil 4 in the rest position 0 in this embodiment is the smallest, and the greater the upward or downward amplitude of the first voice coil 4 is, the greater the magnetic induction intensity is, while the traditional loudspeaker is the opposite. The magnetic induction intensity at the 0 position of the voice coil static position is the largest, and the larger the amplitude of the voice coil, the smaller the magnetic induction intensity. The magnetic induction intensity of the first voice coil 4 in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which ultimately manifests as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction of the first voice coil 4 increases with the increase of the displacement of the first voice coil 4 in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

FIG. 16 is a schematic diagram showing the magnetic induction of the loudspeaker in Embodiment 1, Embodiment 2 and Embodiment 3 and the magnetic induction of a traditional loudspeaker as the voice coil position changes. As shown in Figure 16, C1 in the figure is the curve of the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil, C2 is the curve of the magnetic induction intensity of the loudspeaker of Embodiment 1 changing with the position of the voice coil, and C3 is the magnetic induction intensity of the loudspeaker of Embodiment 3 changing with the position of the voice coil. The curve of the change of the position of the voice coil, C4 is the curve of the magnetic induction intensity of the loudspeaker of the second embodiment changing with the position of the voice coil. In Figure 16, the horizontal axis represents the position of the voice coil, 0 represents the rest position, positive values represent the corresponding position of the upward vibration of the voice coil, negative values represent the corresponding position of the downward vibration of the voice coil; the vertical axis represents the value of the magnetic induction intensity. From the comparison of the four curves C1, C2, C3 and C4, it can be seen that: when the first voice coil 4 is at the same position, the magnetic induction is C2>C3>C4>C1, and the increase of the magnetic induction will increase the sensitivity of the speaker. By comparison, it can be seen that the first embodiment Compared with the sensitivity of the traditional loudspeaker, the sensitivity of the third embodiment is improved, and the loudspeaker of the first embodiment is the optimal solution.

Embodiment four:

Fig. 17 and Fig. 18 are structural schematic diagrams of the loudspeaker of this embodiment. As shown in the figure, the loudspeaker includes a magnetic circuit system A, a vibration system B, a first frame C, a second frame D and a third frame F. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The first frame C, the second frame D and the magnetic circuit system A are fixed to each other to form a plurality of sound holes E arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E.

The structures of the first pan frame C and the second pan frame D are the same as the pan frame structure in the first embodiment, mainly forming the shell of the loudspeaker and used for fixing other structures. The third frame F includes a positive electrode F1 and a negative electrode F2. The third frame F is disposed in the second through hole 92 of the magnetic circuit system A, and is electrically connected to the vibration system B through the positive electrode F1 and the negative electrode F2 so that the driving force of the vibration system B is superimposed.

The magnetic circuit system A comprises a first multipole magnet 1 and a second multipole magnet 2 . Both the first multipole magnet 1 and the second multipole magnet 2 are ring magnets. The first multi-pole magnet 1 is fixed on the inner wall of the first frame C by bonding, and forms a plurality of sound holes E with the inner wall of the first frame C. The second multi-pole magnet 2 is fixed on the inner wall of the second frame D by bonding, and forms a plurality of sound holes E with the inner wall of the second frame D. The first multipole magnet 1 and the second multipole magnet 2 are arranged oppositely, and a static magnetic field is formed between them. Both the first multipole magnet 1 and the second multipole magnet 2 are formed by magnetizing a magnet in different regions. The first multipole magnet 1 comprises a first multipole magnet inner region 11 and a first multipole magnet outer region 12 . A first through hole 91 is formed in the center of the inner region 11 of the first multi-pole magnet, which can be used as a sound outlet, and is suitable for the vibration system B to emit sound through vibration. The second multipole magnet 2 comprises a second multipole magnet inner region 21 and a second multipole magnet outer region 22 . A second through hole 92 is formed in the center of the inner region 21 of the second multi-pole magnet, which is suitable for fixing the third frame F. Wherein, the magnetization direction of the first multipole magnet inner region 11 and the first multipole magnet outer region 12 are opposite; the second multipole magnet inner region 21 and the second multipole magnet outer region 22 magnetization directions are opposite; the first multipole magnet The magnetization directions of the inner region 11 of the magnet and the inner region 21 of the second multipole magnet are opposite.

The vibration system B is set in the static magnetic field formed by the first multipole magnet 1 and the second multipole magnet 2 . The vibration system B includes a diaphragm 3, a first voice coil 4 and a second voice coil 10, the first voice coil 4 and the second voice coil 10 are bonded and fixed on the diaphragm 3 in a coaxial manner, and the two form a ring structure . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The width of the voice coil is wider than the height of the voice coil, and the cross-sectional shape is flat. The wire diameter of the voice coil can be selected in the range of 0.02mm-0.1mm. The first voice coil 4 and the second voice coil 10 are placed in a static magnetic field, and are respectively welded to the positive electrode F1 and the negative electrode F2 through lead wires to realize electrical signal transmission. After the first voice coil 4 is connected to the electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The second voice coil 10 is energized and stressed, and plays the roles of sensitivity superposition, noise reduction, frequency-divided sound signal output, and the like. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shape of the vibrating membrane 3 is the same as that of the loudspeaker, and can also be set in shapes such as a circle, a square, or a racetrack according to different shapes of the loudspeaker. The first multi-pole magnet 1 , the second multi-pole magnet 2 , the first voice coil 4 and the second voice coil 10 can be arranged in corresponding circular rings, square rings or racetrack rings and the like. Preferably, the loudspeaker is set in a circular shape, the shape of the diaphragm 3 is set in a circular shape, and the first multi-pole magnet 1 , the second multi-pole magnet 2 , the first voice coil 4 and the second voice coil 10 are circular.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the first voice coil 4 and the second voice coil 10 and the distribution results of the magnetic induction intensity near the first voice coil 4 and the second voice coil 10 through simulation. As shown in FIG. 19 and FIG. 20 , FIG. 19 is a schematic diagram of the distribution of magnetic induction lines near the voice coil of this embodiment, and FIG. 20 is a schematic diagram of the distribution of magnetic induction near the voice coil of this embodiment. In Fig. 19, the area where the first voice coil 4 is located and the areas directly above and directly below the first voice coil 4 are near the junction of the inner areas 11, 21 and the outer areas 12, 22 of the first multi-pole magnet 1 and the second multi-pole magnet 2 . The direction of the magnetic field in this area is horizontal, and compared with the loudspeaker of the patent CN203775399U, the magnetic field is more concentrated. The area where the second voice coil 10 is located is near the edges of the first through hole 91 and the second through hole 92 , and the direction of the magnetic field in this area is horizontal. The internal current direction of the first voice coil 4 and the second voice coil 10 is perpendicular to the plane of the paper. According to the left-hand rule, the first voice coil 4 and the second voice coil 10 will receive an upward or downward driving force when electrified in the static magnetic field. In order to ensure that the driving force directions of the first voice coil 4 and the second voice coil 10 are the same when electrified, the winding methods of the first voice coil 4 and the second voice coil 10 can be set. Wherein, when the winding directions of the first voice coil 4 and the second voice coil 10 are opposite, the incoming wire ends of the first voice coil 4 and the second voice coil 10 are welded on the same electrode, and the outgoing wire ends are welded on another electrode; Or, when the winding directions of the first voice coil 4 and the second voice coil 10 are the same, the wire-in end of the first voice coil 4 and the wire-out end of the second voice coil 10 are welded on the same electrode, and the wire end of the first voice coil 4 The outgoing wire end and the incoming wire end of the second voice coil 10 are welded on the other electrode. The first voice coil 4 and the second voice coil 10 are forced to vibrate up and down, driving the diaphragm 3 to vibrate and produce sound. The driving force generated by the two voice coils is greater than that generated by one voice coil, which ultimately improves the sensitivity of the speaker. The above is the parallel connection method of the first voice coil 4 and the second voice coil 10. The first voice coil 4 and the second voice coil 10 can also be connected in series. When connecting, pay attention to the direction of the current and the direction of the magnetic field to ensure that the two The driving force generated by the voice coil is superimposed. Preferably, in this embodiment, the lighter the mass of the second voice coil 10 is, the greater the driving force generated by the second voice coil 10 is, and the higher the sensitivity of the speaker is. In Figure 20, the black area represents the area with the highest magnetic induction intensity, and the gray area represents the area with relatively small magnetic induction intensity. The color changes from dark to light, indicating that the magnetic induction intensity changes from large to small. The sizes of the first voice coil 4 and the second voice coil 10 can be determined according to the distribution area of the magnetic induction. When the two voice coils are energized and move up and down, the magnetic induction intensity inside the voice coil changes, and the greater the amplitude, the greater the magnetic induction intensity.

Fig. 21 is a schematic diagram showing the variation of the magnetic induction intensity of the loudspeaker in this embodiment and the magnetic induction intensity of the conventional loudspeaker with the position of the voice coil. In Fig. 21, C1 is the curve of the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil, C5 is the curve of the magnetic induction intensity of the loudspeaker of this embodiment changing with the position of the first voice coil, and C6 is the magnetic induction intensity of the loudspeaker of this embodiment changing with the second voice coil position. The curve of the circle position change. In Figure 21, the horizontal axis represents the position of the voice coil, 0 represents the static position, positive values represent the corresponding position of the voice coil upward vibration, and negative values represent the corresponding position of the voice coil downward vibration; the vertical axis represents the value of the magnetic induction intensity. From the comparison of the curves, it can be seen that the magnetic induction of the first voice coil 4 in this embodiment is higher than that of the traditional loudspeaker voice coil, and the magnetic induction of the second voice coil 10 plays a supplementary role for the first voice coil 4, so in this embodiment The magnetic induction intensity of the medium speaker is higher than that of the traditional speaker. The greater the upward or downward amplitude of the first voice coil 4 and the second voice coil 10 is, the greater the magnetic induction intensity is. On the contrary, the magnetic induction intensity at the static position 0 of the voice coil is the largest, and the greater the amplitude of the voice coil, the smaller the magnetic induction intensity. The magnetic induction intensity of the voice coil in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which is finally manifested as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction intensity of the voice coil increases with the increase of the displacement of the voice coil in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

Embodiment five:

Fig. 22 and Fig. 23 are structural schematic diagrams of the loudspeaker of this embodiment. As shown in the figure, the loudspeaker includes a magnetic circuit system A, a vibration system B, a first frame C, a second frame D and a third frame F. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The first frame C, the second frame D and the magnetic circuit system A are fixed to each other to form a plurality of sound holes E arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The inner sides of the first frame C and the second frame D are provided with through holes whose cross-sections are sequentially connected by multiple arcs, and the arc-shaped inner walls of the through holes are fixedly connected with the magnetic circuit system A to form a plurality of independent Sound hole E. A plurality of sound holes E are arranged around the central axis of the magnetic circuit system A. The vibration system B emits sound along the sound hole E. In this embodiment, the first frame C and the second frame D have the same structure, so the size and number of the sound holes on the front and back of the speaker are the same. Preferably, the performance of the speaker can be optimized by changing the size or number of sound outlets of the first frame C or the second frame D. The third frame F includes a positive electrode F1 and a negative electrode F2. The third frame F is disposed in the second through hole 92 of the magnetic circuit system A, and is electrically connected to the vibration system B through the positive electrode F1 and the negative electrode F2 so that the driving force of the vibration system B is superimposed.

The magnetic circuit system A includes a first magnetic circuit module 5 and a second magnetic circuit module 6 . Central positions of the first magnetic circuit module 5 and the second magnetic circuit module 6 are respectively provided with a first through hole 91 and a second through hole 92 . The first through hole 91 can be used as a sound hole, which is suitable for the vibration system B to emit sound through vibration. The second through hole 92 is suitable for fixing the third frame F, so as to facilitate the electrical connection between the vibration system B and the electrodes. The first magnetic circuit module 5 is fixed on the inner wall of the first frame C by bonding, and forms a plurality of sound holes E with the inner wall of the first frame C. The second magnetic circuit module 6 is fixed on the inner wall of the second frame D by bonding, and forms a plurality of sound holes E with the inner wall of the second frame D. The first magnetic circuit module 5 and the second magnetic circuit module 6 are arranged oppositely, and a static magnetic field is formed between them. The first magnetic circuit module 5 includes a first magnet 51 and a first magnetic cup 52 . The second magnetic circuit module 6 includes a second magnet 61 and a second magnetic cup 62 . The first magnet 51 and the second magnet 61 are bonded in the first magnetic cup 52 and the second magnetic cup 62 respectively. The outer diameter of the magnet is equal to the inner diameter of the magnetic cup. After bonding, the magnet and the magnetic cup are closely attached. The first magnet 51 and the second magnet 61 are magnetized along the entire lengthwise direction of the magnets, and the magnetization directions of the first magnet 51 and the second magnet 61 are opposite. The first magnet 51 and the first magnetic cup 52 , the second magnet 61 and the second magnetic cup 62 jointly form a static magnetic field.

The vibration system B is set in the static magnetic field formed by the first magnetic circuit module 5 and the second magnetic circuit module 6 . The vibration system B includes a diaphragm 3, a first voice coil 4 and a second voice coil 10, the first voice coil 4 and the second voice coil 10 are bonded and fixed on the diaphragm 3 in a coaxial manner, and the two form a ring structure . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The width of the voice coil is wider than the height of the voice coil, and the cross-sectional shape is flat. The wire diameter of the voice coil can be selected in the range of 0.02mm-0.1mm. The first voice coil 4 and the second voice coil 10 are placed in a static magnetic field, and are respectively welded to the positive electrode F1 and the negative electrode F2 through lead wires to realize electrical signal transmission. After the first voice coil 4 is connected to the electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The second voice coil 10 is energized and stressed, and plays the roles of sensitivity superposition, noise reduction, frequency-divided sound signal output, and the like. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shape of the vibrating membrane 3 is the same as that of the loudspeaker, and can also be set in shapes such as a circle, a square, or a racetrack according to different shapes of the loudspeaker. The first magnetic circuit module 5 , the second magnetic circuit module 6 , the first voice coil 4 and the second voice coil 10 can be arranged in corresponding circular rings, square rings or racetrack rings and the like. Preferably, the loudspeaker is set in a circular shape, the shape of the diaphragm 3 is set in a circular shape, and the first magnetic circuit module 5 , the second magnetic circuit module 6 , the first voice coil 4 and the second voice coil 10 are circular.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the first voice coil 4 and the second voice coil 10 and the distribution results of the magnetic induction intensity near the first voice coil 4 and the second voice coil 10 through simulation. As shown in FIG. 24 and FIG. 25 , FIG. 24 is a schematic diagram of the distribution of magnetic induction lines near the voice coil of this embodiment, and FIG. 25 is a schematic diagram of the distribution of magnetic induction near the voice coil of this embodiment. In FIG. 24 , the area where the first voice coil 4 is located and the areas directly above and directly below the first voice coil 4 are near the junctions between the first magnet 51 and the first magnetic cup 52 , and the second magnet 61 and the second magnetic cup 62 . The direction of the magnetic field in this area is horizontal, and compared with the loudspeaker of the patent CN203775399U, the magnetic field is more concentrated. The area where the second voice coil 10 is located is near the edges of the first through hole 91 and the second through hole 92 , and the direction of the magnetic field in this area is horizontal. The internal current direction of the first voice coil 4 and the second voice coil 10 is perpendicular to the plane of the paper. According to the left-hand rule, the first voice coil 4 and the second voice coil 10 will receive an upward or downward driving force when electrified in the static magnetic field. In order to ensure that the driving force directions of the first voice coil 4 and the second voice coil 10 are the same when electrified, the winding methods of the first voice coil 4 and the second voice coil 10 can be set. The winding method of the first voice coil 4 and the second voice coil 10 in this embodiment is the same as that of the voice coil in Embodiment 4, both of which can ensure that the driving forces generated by the two voice coils are superimposed. In Figure 25, the black area represents the area with the highest magnetic induction intensity, and the gray area represents the area with relatively small magnetic induction intensity. The color changes from dark to light, indicating that the magnetic induction intensity changes from large to small. The sizes of the first voice coil 4 and the second voice coil 10 can be determined according to the distribution area of the magnetic induction. When the two voice coils are energized and move up and down, the magnetic induction intensity inside the voice coil changes, and the greater the amplitude, the greater the magnetic induction intensity.

Fig. 26 is a schematic diagram showing the magnetic induction of the loudspeaker in this embodiment and the magnetic induction of the traditional loudspeaker changing with the position of the voice coil. In Fig. 26, C1 is the curve of the magnetic induction intensity of the traditional loudspeaker changing with the position of the voice coil, C7 is the curve of the magnetic induction intensity of the loudspeaker of this embodiment changing with the position of the first voice coil, and C8 is the magnetic induction intensity of the loudspeaker of this embodiment changing with the second voice coil position. The curve of the circle position change. In Figure 26, the horizontal axis represents the position of the voice coil, 0 represents the rest position, positive values represent the corresponding position of the upward vibration of the voice coil, negative values represent the corresponding position of the downward vibration of the voice coil; the vertical axis represents the value of the magnetic induction intensity. From the comparison of the curves, it can be seen that the magnetic induction of the first voice coil 4 in this embodiment is higher than that of the traditional loudspeaker voice coil, and the magnetic induction of the second voice coil 10 plays a supplementary role for the first voice coil 4, so in this embodiment The magnetic induction intensity of the medium speaker is higher than that of the traditional speaker. The greater the upward or downward amplitude of the first voice coil 4 and the second voice coil 10 is, the greater the magnetic induction intensity is. On the contrary, the magnetic induction intensity at the static position 0 of the voice coil is the largest, and the greater the amplitude of the voice coil, the smaller the magnetic induction intensity. The magnetic induction intensity of the voice coil in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which is finally manifested as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction intensity of the voice coil increases with the increase of the displacement of the voice coil in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

Embodiment six:

Fig. 27 is a schematic structural diagram of the speaker of this embodiment. As shown in FIG. 27 , the loudspeaker includes a magnetic circuit system A, a vibration system B, a first frame C, a second frame D and a third frame F. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The magnetic circuit system A is provided with a plurality of sound holes E arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The insides of the first frame C and the second frame D are both configured as cylindrical through holes. The third frame F includes a positive electrode F1 and a negative electrode F2. The third frame F is disposed in the second through hole 92 of the magnetic circuit system A, and is electrically connected to the vibration system B through the positive electrode F1 and the negative electrode F2 so that the driving force of the vibration system B is superimposed.

The magnetic circuit system A includes a third magnetic circuit module 7 and a fourth magnetic circuit module 8 . The center positions of the third magnetic circuit module 7 and the fourth magnetic circuit module 8 are respectively provided with a first through hole 91 and a second through hole 92 . The first through hole 91 can be used as a sound hole, which is suitable for the vibration system B to emit sound through vibration. The second through hole 92 is suitable for fixing the third frame F, so as to facilitate the electrical connection between the vibration system B and the electrodes. The external dimensions of the third magnetic circuit module 7 and the fourth magnetic circuit module 8 are adapted to the size of the cylindrical through hole of the frame. The third magnetic circuit module 7 is fixed in the cylindrical through hole of the first frame C by bonding. The fourth magnetic circuit module 8 is fixed in the cylindrical through hole of the second frame D by bonding. The third magnetic circuit module 7 and the fourth magnetic circuit module 8 are arranged oppositely, and a static magnetic field is formed between them. The third magnetic circuit module 7 includes a third magnet 71 and a third magnetic cup 72 . The fourth magnetic circuit module 8 includes a fourth magnet 81 and a fourth magnetic cup 82 . The bottoms of the third magnetic bowl 72 and the fourth magnetic bowl 82 are both provided with a plurality of cylindrical sound holes E. A plurality of sound holes E are arranged around the center of the magnetic bowl. The third magnet 71 is fixed in the third magnetic bowl 72 , forms an annular gap with the third magnetic bowl 72 , and the annular gap communicates with the sound hole E at the bottom of the third magnetic bowl 72 . The fourth magnet 81 is fixed in the fourth magnetic bowl 82 , forms an annular gap with the fourth magnetic bowl 82 , and the annular gap communicates with the sound hole E at the bottom of the fourth magnetic bowl 82 . The third magnet 71 and the fourth magnet 81 are magnetized along the entire lengthwise direction of the magnets, and the magnetization directions of the third magnet 71 and the fourth magnet 81 are opposite. The third magnet 71 and the third magnetic bowl 72 , the fourth magnet 81 and the fourth magnetic bowl 82 jointly form a static magnetic field. The vibration system B is set in the static magnetic field, and the sound generated by the vibration of the vibration system B is transmitted through the annular gap and the sound hole E. The structure of the third magnetic bowl 72 is the same as that of the fourth magnetic bowl 82, so the size and number of sound outlets on the front and back of the speaker are the same. Preferably, the performance of the speaker can be optimized by changing the size or quantity of the sound hole of one of the magnetic bowls.

The vibration system B is set in the static magnetic field formed by the third magnetic circuit module 7 and the fourth magnetic circuit module 8 . The vibration system B includes a diaphragm 3, a first voice coil 4 and a second voice coil 10, the first voice coil 4 and the second voice coil 10 are bonded and fixed on the diaphragm 3 in a coaxial manner, and the two form a ring structure . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The width of the voice coil is wider than the height of the voice coil, and the cross-sectional shape is flat. The wire diameter of the voice coil can be selected in the range of 0.02mm-0.1mm. The first voice coil 4 and the second voice coil 10 are placed in a static magnetic field, and are respectively welded to the positive electrode F1 and the negative electrode F2 through lead wires to realize electrical signal transmission. By adjusting the winding direction of the voice coil or welding the corresponding electrodes at the inlet and outlet wire ends, it is ensured that the voice coil generates the driving force in the same direction. After the first voice coil 4 is connected to the electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The second voice coil 10 is energized and stressed, and plays the roles of sensitivity superposition, noise reduction, frequency-divided sound signal output, and the like. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shape of the vibrating membrane 3 is the same as that of the loudspeaker, and can also be set in shapes such as a circle, a square, or a racetrack according to different shapes of the loudspeaker. The third magnetic circuit module 7 , the fourth magnetic circuit module 8 , the first voice coil 4 and the second voice coil 10 can be arranged in corresponding circular rings, square rings or racetrack rings and the like. Preferably, the loudspeaker is set in a circular shape, the shape of the diaphragm 3 is set in a circular shape, and the third magnetic circuit module 7 , the fourth magnetic circuit module 8 , the first voice coil 4 and the second voice coil 10 are circular. The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the voice coil and the distribution results of the magnetic induction intensity near the voice coil through simulation. The magnetic induction intensity of the voice coil in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which is finally manifested as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction intensity of the voice coil increases with the increase of the displacement of the voice coil in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

Embodiment seven:

Fig. 28 is a schematic structural diagram of the speaker of this embodiment. As shown in FIG. 28 , the loudspeaker includes a magnetic circuit system A, a vibration system B, a first frame C and a second frame D. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The first frame C, the second frame D and the magnetic circuit system A are fixed to each other to form a plurality of sound holes E1 arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E1.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The inner sides of the first frame C and the second frame D are provided with through holes whose cross-sections are sequentially connected by multiple arcs, and the arc-shaped inner walls of the through holes are fixedly connected with the magnetic circuit system A to form a plurality of independent Sound hole E1. A plurality of sound holes E1 are arranged around the central axis of the magnetic circuit system A. The vibration system B emits sound along the sound hole E1. In this embodiment, the first frame C and the second frame D have the same structure, so the size and number of the sound holes on the front and back of the speaker are the same. Preferably, the performance of the loudspeaker can be optimized by changing the size or number of the sound holes of one of the basin frames.

The magnetic circuit system A includes a third magnetic circuit module 7 and a fourth magnetic circuit module 8 . The external dimensions of the third magnetic circuit module 7 and the fourth magnetic circuit module 8 are adapted to the size of the cylindrical through hole of the frame. The third magnetic circuit module 7 is fixed in the cylindrical through hole of the first frame C by bonding. The fourth magnetic circuit module 8 is fixed in the cylindrical through hole of the second frame D by bonding. The third magnetic circuit module 7 and the fourth magnetic circuit module 8 are arranged oppositely, and a static magnetic field is formed between them. The third magnetic circuit module 7 includes a third magnet 71 and a third magnetic cup 72 . The fourth magnetic circuit module 8 includes a fourth magnet 81 and a fourth magnetic cup 82 . The bottoms of the third magnetic bowl 72 and the fourth magnetic bowl 82 are both provided with a plurality of cylindrical sound holes E2. A plurality of sound holes E2 are arranged around the center of the magnetic bowl. The third magnet 71 is fixed in the third magnetic bowl 72 , forms an annular gap with the third magnetic bowl 72 , and the annular gap communicates with the sound outlet E2 at the bottom of the third magnetic bowl 72 . The fourth magnet 81 is fixed in the fourth magnetic bowl 82 , forms an annular gap with the fourth magnetic bowl 82 , and the annular gap communicates with the sound hole E2 at the bottom of the fourth magnetic bowl 82 . The third magnet 71 and the fourth magnet 81 are magnetized along the entire lengthwise direction of the magnets, and the magnetization directions of the third magnet 71 and the fourth magnet 81 are opposite. The third magnet 71 and the third magnetic bowl 72 , the fourth magnet 81 and the fourth magnetic bowl 82 jointly form a static magnetic field. The vibration system B is set in the static magnetic field, and the sound generated by the vibration of the vibration system B is transmitted through the sound holes E1 and E2. The structure of the third magnetic bowl 72 is the same as that of the fourth magnetic bowl 82, so the size and number of sound outlets on the front and back of the speaker are the same. Preferably, the performance of the speaker can be optimized by changing the size or quantity of the sound hole of one of the magnetic bowls.

The vibration system B is set in the static magnetic field formed by the third magnetic circuit module 7 and the fourth magnetic circuit module 8 . The vibration system B includes a diaphragm 3 and a first voice coil 4 , and the first voice coil 4 is glued and fixed on the diaphragm 3 . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The winding width of the first voice coil 4 is wider than the winding height of the first voice coil 4 , and the cross-sectional shape is flat. The optional range of wire diameter of the first voice coil 4 is 0.02mm-0.1mm. The first voice coil 4 is placed in a static magnetic field, and after the first voice coil 4 is connected to an electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shapes of the third magnetic circuit module 7 , the fourth magnetic circuit module 8 and the diaphragm 3 are the same as those of the loudspeaker, and may also be set in a circular, square or racetrack shape according to different shapes of the loudspeaker. The first voice coil 4 is configured as a corresponding circular ring, square ring or racetrack ring. Preferably, the loudspeaker is set in a circular shape, the shapes of the third magnetic circuit module 7 , the fourth magnetic circuit module 8 and the diaphragm 3 are set in a circular shape, and the first voice coil 4 is set in a circular shape.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the voice coil and the distribution results of the magnetic induction intensity near the voice coil through simulation. The magnetic induction intensity of the voice coil in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which is finally manifested as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction intensity of the voice coil increases with the increase of the displacement of the voice coil in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

Embodiment eight:

Fig. 29 is a schematic structural diagram of the speaker of this embodiment. As shown in FIG. 29 , the loudspeaker includes a magnetic circuit system A, a vibration system B, a first frame C, a second frame D and a third frame F. Wherein, the first frame C and the second frame D are oppositely arranged to form an accommodating cavity. The magnetic circuit system A and the vibrating system B are fixed in the accommodating cavity formed by the first frame C and the second frame D. The first frame C, the second frame D and the magnetic circuit system A are fixed to each other to form a plurality of sound holes E1 arranged around the central axis of the magnetic circuit system A. The sound generated by the vibration system B vibrating in the magnetic circuit system A is transmitted through the sound outlet E1.

The first frame C and the second frame D have the same structure, and mainly form the shell of the loudspeaker for fixing other structures. The inner sides of the first frame C and the second frame D are provided with through holes whose cross-sections are sequentially connected by multiple arcs, and the arc-shaped inner walls of the through holes are fixedly connected with the magnetic circuit system A to form a plurality of independent Sound hole E1. A plurality of sound holes E1 are arranged around the central axis of the magnetic circuit system A. The vibration system B emits sound along the sound hole E1. In this embodiment, the first frame C and the second frame D have the same structure, so the size and number of the sound holes on the front and back of the speaker are the same. Preferably, the performance of the speaker can be optimized by changing the size or number of sound outlets of the first frame C or the second frame D. The third frame F includes a positive electrode F1 and a negative electrode F2. The third frame F is disposed in the second through hole 92 of the magnetic circuit system A, and is electrically connected to the vibration system B through the positive electrode F1 and the negative electrode F2 so that the driving force of the vibration system B is superimposed.

The magnetic circuit system A includes a third magnetic circuit module 7 and a fourth magnetic circuit module 8 . The center positions of the third magnetic circuit module 7 and the fourth magnetic circuit module 8 are respectively provided with a first through hole 91 and a second through hole 92 . The first through hole 91 can be used as a sound hole, which is suitable for the vibration system B to emit sound through vibration. The second through hole 92 is suitable for fixing the third frame F, so as to facilitate the electrical connection between the vibration system B and the electrodes. The external dimensions of the third magnetic circuit module 7 and the fourth magnetic circuit module 8 are adapted to the size of the cylindrical through hole of the frame. The third magnetic circuit module 7 is fixed in the cylindrical through hole of the first frame C by bonding. The fourth magnetic circuit module 8 is fixed in the cylindrical through hole of the second frame D by bonding. The third magnetic circuit module 7 and the fourth magnetic circuit module 8 are arranged oppositely, and a static magnetic field is formed between them. The third magnetic circuit module 7 includes a third magnet 71 and a third magnetic cup 72 . The fourth magnetic circuit module 8 includes a fourth magnet 81 and a fourth magnetic cup 82 . The bottoms of the third magnetic bowl 72 and the fourth magnetic bowl 82 are both provided with a plurality of cylindrical sound holes E2. A plurality of sound holes E2 are arranged around the center of the magnetic bowl. The third magnet 71 is fixed in the third magnetic bowl 72 , forms an annular gap with the third magnetic bowl 72 , and the annular gap communicates with the sound outlet E2 at the bottom of the third magnetic bowl 72 . The fourth magnet 81 is fixed in the fourth magnetic bowl 82 , forms an annular gap with the fourth magnetic bowl 82 , and the annular gap communicates with the sound hole E2 at the bottom of the fourth magnetic bowl 82 . The third magnet 71 and the fourth magnet 81 are magnetized along the entire lengthwise direction of the magnets, and the magnetization directions of the third magnet 71 and the fourth magnet 81 are opposite. The third magnet 71 and the third magnetic bowl 72 , the fourth magnet 81 and the fourth magnetic bowl 82 jointly form a static magnetic field. The vibration system B is set in the static magnetic field, and the sound generated by the vibration of the vibration system B is transmitted through the sound outlet E1 and the sound outlet E2. The structure of the third magnetic bowl 72 is the same as that of the fourth magnetic bowl 82, so the size and number of sound outlets on the front and back of the speaker are the same. Preferably, the performance of the speaker can be optimized by changing the size or quantity of the sound hole of one of the magnetic bowls.

The vibration system B is set in the static magnetic field formed by the third magnetic circuit module 7 and the fourth magnetic circuit module 8 . The vibration system B includes a diaphragm 3, a first voice coil 4 and a second voice coil 10, the first voice coil 4 and the second voice coil 10 are bonded and fixed on the diaphragm 3 in a coaxial manner, and the two form a ring structure . One side of the edge of the diaphragm 3 is bonded and fixed to the first frame C, and the other side is bonded and fixed to the second frame D. The width of the voice coil is wider than the height of the voice coil, and the cross-sectional shape is flat. The wire diameter of the voice coil can be selected in the range of 0.02mm-0.1mm. The first voice coil 4 and the second voice coil 10 are placed in a static magnetic field, and are respectively welded to the positive electrode F1 and the negative electrode F2 through lead wires to realize electrical signal transmission. After the first voice coil 4 is connected to the electric signal, it is forced to drive the diaphragm 3 to vibrate and produce sound. The second voice coil 10 is energized and stressed, and plays the roles of sensitivity superposition, noise reduction, frequency-divided sound signal output, and the like. The diaphragm 3 comprises edge surrounds and a mid-plane area. In order to improve the rigidity of the middle area of the diaphragm 3 and improve the high-frequency frequency response performance, a reinforcing plate can be pasted on the plane area or the middle area of the diaphragm 3 can be set as an arc-shaped dome. The dome can be integrally formed with the ring, and the dome The shape has increased rigidity compared to a planar shape. If the rigidity of the vault is still insufficient, a layer of reinforcement board can be pasted on the vault to increase the rigidity of the vault and improve the high-frequency frequency response performance. The thickness of the diaphragm 3 can be selected in the range of 10um-100um. The material of the vibrating membrane 3 can be nickel-iron alloy, stainless steel, polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK), FR4 glass fiber reinforced epoxy resin and the like.

In this embodiment, the shape of the loudspeaker may be a circle, a square, or a track shape. The shape of the vibrating membrane 3 is the same as that of the loudspeaker, and can also be set in shapes such as a circle, a square, or a racetrack according to different shapes of the loudspeaker. The third magnetic circuit module 7 , the fourth magnetic circuit module 8 , the first voice coil 4 and the second voice coil 10 can be arranged in corresponding circular rings, square rings or racetrack rings and the like. Preferably, the loudspeaker is set in a circular shape, the shape of the diaphragm 3 is set in a circular shape, and the third magnetic circuit module 7 , the fourth magnetic circuit module 8 , the first voice coil 4 and the second voice coil 10 are circular.

The loudspeaker of this embodiment can calculate the distribution results of the magnetic induction lines near the voice coil and the distribution results of the magnetic induction intensity near the voice coil through simulation. The magnetic induction intensity of the voice coil in this embodiment is higher than that of the traditional loudspeaker voice coil in an all-round way, which is finally manifested as an increase in the sensitivity of the loudspeaker. In addition, the characteristic that the magnetic induction intensity of the voice coil increases with the increase of the displacement of the voice coil in this embodiment is beneficial to reduce the nonlinear characteristics of the speaker and suppress the total harmonic distortion of the speaker.

In Embodiments 4, 5, 6 and 8, the vibrating membrane 3 may also be configured as a structure having a first ring 31 , a second ring 32 and a dome 33 , as shown in FIG. 30 . The dome 33 can extend the high frequency response, the first ring 31 and the second ring 32 are relatively independent, and the deformation between the two rings does not interfere with each other. The first voice coil 4 is bonded between the first ring 31 and the second ring 32 , and the second voice coil 10 is bonded between the second ring 32 and the dome 33 . The first voice coil 4 and the second voice coil 10 can be connected to the electrodes in the welding manner as shown above, or the first voice coil 4 and the second voice coil 10 can be welded to two independent electrodes respectively, and the signals are independently input to The first voice coil 4 and the second voice coil 10 . Through the double-ring design of the diaphragm 3, when the two voice coils are energized and vibrate, the first voice coil 4 deforms the first surround 31, the vibration can generate sound waves, and the second voice coil 10 causes the second surround 32 to generate Deformation and vibration can generate sound waves, and finally a speaker can have two sets of independent signal output functions. Because the two voice coils can vibrate independently, the speaker can also achieve the following functions: First, the input electrical signal can be divided according to the frequency response characteristics of the speaker itself, and the low-frequency signal or full-frequency signal can be input to the first sound. At the same time, the high-frequency signal is input to the second voice coil 10, the first voice coil 4 is used as the main driving voice coil or the bass driving voice coil, responsible for full-frequency sound reproduction or low-frequency sound reproduction, and the second voice coil 10 As a treble-driven voice coil, it is responsible for high-frequency sound playback or treble reinforcement; second, this embodiment can be used as an earphone unit in the field of surround sound headphones, because the first voice coil 4 and the second voice coil 10 are driven. The generated sound is relatively independent, and different signals can be input into the first voice coil 4 and the second voice coil 10, and the two voice coils 4 and 10 of one earphone unit can produce a surround sound effect. Thirdly, this embodiment is used as an earphone unit for the field of noise reduction earphones, the electrical signal can be input to the first voice coil 4, the first voice coil 4 is used as the driving voice coil, and the noise reduction signal is input to the second voice coil 10. The second voice coil 10 emits a sound that is in phase opposite to the ambient noise, so as to realize the noise reduction function. Because the two groups of voice coils in this embodiment are relatively independent, the noise reduction effect is better than that of traditional noise reduction headphones.

The structure of the loudspeaker in the above embodiments can also be applied to the earphone core, so that the earphone can have better balanced magnetic field and sensitivity.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A loudspeaker comprising: The magnetic circuit system forms a static magnetic field; a vibration system, including a diaphragm and a first voice coil, arranged in the static magnetic field; The first frame and the second frame are suitable for fixing the magnetic circuit system and the vibration system; Wherein, the loudspeaker is formed with a plurality of sound outlets, and the plurality of sound outlets are arranged around the central axis of the magnetic circuit system. 2. The loudspeaker according to claim 1, characterized in that, the first frame and the second frame are arranged opposite to each other, wherein both the inside of the first frame and the second frame are provided with The cross section is a through hole formed by sequentially connecting multiple circular arcs, and the inner side wall of the through hole is fixedly connected with the magnetic circuit system to form a plurality of independent sound outlets. 3. The loudspeaker according to claim 2, wherein the magnetic circuit system comprises: The first multi-pole magnet is fixedly connected with the first frame to form a plurality of sound holes; The second multi-pole magnet is fixedly connected with the second frame to form a plurality of sound outlets; Wherein, the vibration system is arranged between the first multi-pole magnet and the second multi-pole magnet. 4. The loudspeaker according to claim 2, wherein the magnetic circuit system comprises: a first magnet and a first magnetic cup, the first magnet is fixed in the first magnetic cup to form a first magnetic circuit module; a second magnet and a second magnetic bowl, the second magnet is fixed in the second magnetic bowl to form a second magnetic circuit module; Wherein, the first magnetic circuit module and the second magnetic circuit module are respectively fixed in the first frame and the second frame, and the vibration system is arranged on the first magnetic circuit module and the second frame. between the second magnetic circuit modules. 5. The loudspeaker according to claim 1 or 2, wherein the magnetic circuit system comprises: a third magnet and a third magnetic cup, the third magnet is fixed in the third magnetic cup to form a third magnetic circuit module; a fourth magnet and a fourth magnetic cup, the fourth magnet is fixed in the fourth magnetic cup to form a fourth magnetic circuit module; Wherein, the bottoms of the third magnetic bowl and the fourth magnetic bowl are provided with a plurality of sound holes, and the third magnet and the fourth magnet are connected to the third magnetic bowl and the fourth magnetic bowl. An annular gap is formed, and the annular gap communicates with the plurality of sound holes; Preferably, the third magnetic circuit module and the fourth magnetic circuit module are respectively fixed in the first frame and the second frame, and the vibration system is arranged between the third magnetic circuit module and the second frame. between the fourth magnetic circuit modules. 6. The loudspeaker according to claim 3, wherein the loudspeaker further comprises: The second voice coil is arranged on the diaphragm and forms an annular space with the first voice coil; The third pot frame, including the positive electrode and the negative electrode; Wherein, the first multipole magnet is provided with a first through hole, and the second multipole magnet is provided with a second through hole, and the third frame is arranged in the second through hole, through which the positive and negative electrodes It is electrically connected with the first voice coil and the second voice coil so that the driving forces of the first voice coil and the second voice coil are superimposed. 7. The loudspeaker according to claim 4, wherein the loudspeaker further comprises: The second voice coil is arranged on the diaphragm and forms an annular space with the first voice coil; The third pot frame, including the positive electrode and the negative electrode; Wherein, the first magnetic circuit module is provided with a first through hole, the second magnetic circuit module is provided with a second through hole, the third frame is provided in the second through hole, and the positive and negative electrodes pass through the second through hole. It is electrically connected with the first voice coil and the second voice coil so that the driving forces of the first voice coil and the second voice coil are superimposed. 8. The loudspeaker according to claim 5, wherein the loudspeaker further comprises: The second voice coil is arranged on the diaphragm and forms an annular space with the first voice coil; The third pot frame, including the positive electrode and the negative electrode; Wherein, the third magnetic circuit module is provided with a first through hole, the fourth magnetic circuit module is provided with a second through hole, the third frame is provided in the second through hole, and the positive and negative electrodes pass through the second through hole. It is electrically connected with the first voice coil and the second voice coil so that the driving forces of the first voice coil and the second voice coil are superimposed. 9. The loudspeaker according to any one of claims 6-8, wherein the diaphragm comprises: a first surround, concentric with the center of the diaphragm; a second ring concentric with the first ring to form a ring structure; and, The dome is arranged on the vibrating membrane surrounded by the second ring to expand the high-frequency frequency response. 10. The loudspeaker according to claim 9, wherein the first voice coil is arranged between the first ring and the second ring, and the second voice coil is arranged at the first The gap between the second fold ring and the dome is suitable for the independent vibration of the first voice coil and the second voice coil.