CN114710735B - Speakers and electronic devices - Google Patents

Abstract

The present application discloses a loudspeaker and an electronic device, belonging to the technical field of acoustic equipment. The loudspeaker comprises a housing, a magnet assembly, a diaphragm, a voice coil and a first auxiliary magnet; the housing has a receiving cavity; the magnet assembly is arranged in the receiving cavity, the magnet assembly comprises a central magnet and a side magnet, the side magnet is arranged outside the central magnet, and there is a gap between the side magnet and the central magnet; the diaphragm is arranged between the magnet assembly and the housing; the voice coil is arranged on a side of the diaphragm close to the magnet assembly, and the voice coil is opposite to the gap; the first auxiliary magnet is arranged between the diaphragm and the housing; a first groove is arranged on a side of the diaphragm facing the housing, and the first auxiliary magnet is opposite to the notch of the first groove.

Description

Speakers and electronic devices

Technical Field

The present application belongs to the field of acoustic equipment, and specifically relates to a speaker and an electronic device.

Background Art

Electronic devices are equipped with speakers to convert the electrical signals of the electronic devices into sound signals to make sounds. As the application scope of electronic devices becomes wider and wider, people's demand for the performance of electronic devices is also getting higher and higher. For example, the music, videos, games, and calls of electronic devices all require the speakers to have good sound performance to enhance the user experience. Therefore, the sound performance requirements of the speakers are also increasing.

In a speaker, a magnetic field is formed by the center magnet and the side magnets. The voice coil is located in the magnetic field. When an alternating current is passed through the voice coil, the voice coil reciprocates in the magnetic field, thereby driving the diaphragm to move, and then pushing the air to make sound. The magnetic field formed by the center magnet and the side magnets is stronger in the area close to the center magnet and the side magnets, and weaker in the area far away from the center magnet and the side magnets. During the reciprocating motion of the voice coil, when the voice coil moves to a position far away from the center magnet and the side magnets, the magnetic field is weak, resulting in insufficient magnetic force, thus affecting the sound performance of the speaker.

Summary of the invention

The purpose of the embodiments of the present application is to provide a loudspeaker and an electronic device that can solve the problem of insufficient magnetic force when the voice coil is away from the center magnet and the side magnet during the reciprocating motion of the voice coil, thereby affecting the sound performance.

In a first aspect, an embodiment of the present application provides a loudspeaker, comprising a housing, a magnet assembly, a diaphragm, a voice coil, and a first auxiliary magnet;

The shell has a receiving cavity; the magnet assembly is arranged in the receiving cavity, the magnet assembly includes a central magnet and a side magnet, the side magnet is arranged outside the central magnet, and there is a gap between the side magnet and the central magnet; the diaphragm is arranged between the magnet assembly and the shell; the voice coil is arranged on a side of the diaphragm close to the magnet assembly, and the voice coil is opposite to the gap; the first auxiliary magnet is arranged between the diaphragm and the shell;

A first groove is provided on a side of the diaphragm facing the shell, and the first auxiliary magnet is opposite to a notch of the first groove.

In a second aspect, an embodiment of the present application provides an electronic device, comprising the above-mentioned speaker.

In an embodiment of the present application, the loudspeaker includes a housing, a magnet assembly, a diaphragm, a voice coil and a first auxiliary magnet. The central magnet and the side magnet cooperate to form a magnetic field. The voice coil is located in the magnetic field. When an alternating current is passed through the voice coil, the voice coil reciprocates in the magnetic field, thereby driving the diaphragm to move, and then pushing the air to make a sound. The first auxiliary magnet is arranged between the diaphragm and the housing. A magnetic field can be formed between the first auxiliary magnet and the side magnet. The magnetic field formed by the first auxiliary magnet and the side magnet will also pass through the voice coil, thereby increasing the magnetic field strength in the area where the voice coil is located, thereby increasing the magnetic force on the voice coil. Even if the voice coil moves to an area with a weaker magnetic field away from the central magnet and the side magnet, the magnetic force on the voice coil will be increased under the action of the first auxiliary magnet, thereby increasing the volume, improving the sound quality, and improving the sound performance of the loudspeaker.

A first groove is provided on the side of the diaphragm facing the housing, and the first auxiliary magnet is opposite to the notch of the first groove. When the diaphragm is close to the housing, the first auxiliary magnet can extend into the first groove, and the first groove can provide a space for the first auxiliary magnet, thereby preventing the first auxiliary magnet from occupying a large space, increasing the amplitude of the diaphragm, and the first auxiliary magnet can be closer to the voice coil, so that the magnetic field enhancement effect of the first auxiliary magnet is greater. In addition, the groove structure on the diaphragm can prevent vibration from propagating along the surface of the diaphragm, thereby improving the sound performance of the speaker.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a longitudinal cross-sectional view of a loudspeaker according to an embodiment of the present application;

FIG2 is a partial top view of a speaker in an embodiment of the present application;

FIG3 is a transverse cross-sectional view of a loudspeaker (without showing the first auxiliary magnet) in an embodiment of the present application;

FIG4 is a transverse cross-sectional view of a loudspeaker (showing a first auxiliary magnet) in an embodiment of the present application;

FIG. 5 is a partial top view of the speaker in the embodiment of the present application.

Description of reference numerals:

100-housing, 110-sound outlet, 120-front cover, 130-accommodation cavity,

200-magnet assembly, 210-center magnet, 211-second groove, 220-side magnet,

300 - diaphragm, 310 - first groove, 311 - first groove portion, 312 - second groove portion, 313 - third groove portion, 314 - fourth groove portion, 320 - first protrusion,

400-Voice Coil,

500 - first auxiliary magnet, 510 - first magnet portion, 520 - second magnet portion, 530 - third magnet portion, 540 - fourth magnet portion, 550 - fillet,

600-magnetic sheet,

700- second auxiliary magnet,

800 - Third auxiliary magnet.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and/or" in the specification and claims represents at least one of the connected objects, and the character "/" generally indicates that the objects associated with each other are in an "or" relationship.

The speaker and the electronic device provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 5 , an embodiment of the present application provides a loudspeaker, which includes a housing 100 , a magnet assembly 200 , a diaphragm 300 , a voice coil 400 , and a first auxiliary magnet 500 .

The housing 100 is the main component of the speaker and can provide a mounting base and mounting space for other components of the speaker. The housing 100 can be a steel sheet structure or a plastic structure housing 100, and the housing 100 has a receiving cavity 130. Other components of the speaker are arranged in the receiving cavity 130.

The magnet assembly 200 is disposed in the accommodating chamber 130. The magnet assembly 200 includes a central magnet 210 and a side magnet 220. The side magnet 220 is disposed outside the central magnet 210, and there is a gap between the side magnet 220 and the central magnet 210. A magnetic field can be formed between the central magnet 210 and the side magnet 220.

The diaphragm 300 is disposed between the magnet assembly 200 and the housing 100. The diaphragm 300 may be connected to the housing 100, and the diaphragm 300 may move in the cavity between the magnet assembly 200 and the housing 100 to push the air between the diaphragm 300 and the housing 100 to generate sound.

The voice coil 400 is disposed on a side of the diaphragm 300 close to the magnet assembly 200. Optionally, the voice coil 400 may be directly connected to the diaphragm 300, or, in a dome speaker, the voice coil 400 may be connected to the dome, and the diaphragm 300 is disposed on the dome. The voice coil 400 is opposite to the gap, and the voice coil 400 is located in the magnetic field. When an alternating current is passed through the voice coil 400, the voice coil 400 reciprocates in the magnetic field, thereby driving the diaphragm 300 to move, and then pushing the air between the diaphragm 300 and the housing 100 to produce sound.

The first auxiliary magnet 500 is disposed between the diaphragm 300 and the housing 100. A magnetic field can be formed between the first auxiliary magnet 500 and the side magnet 220. The magnetic field formed by the first auxiliary magnet 500 and the side magnet 220 will also pass through the voice coil 400, increasing the magnetic field strength in the area where the voice coil 400 is located, thereby increasing the magnetic force on the voice coil 400. When the voice coil 400 moves to an area with a weaker magnetic field away from the center magnet 210 and the side magnet 220, the voice coil 400 can enter the magnetic field formed by the first auxiliary magnet 500 and the side magnet 220. Under the action of the first auxiliary magnet 500, the magnetic force on the voice coil 400 will be increased, thereby increasing the volume, improving the sound quality, and improving the sound performance of the speaker.

A first groove 310 is provided on the side of the diaphragm 300 facing the housing 100. The first auxiliary magnet 500 is opposite to the notch of the first groove 310. When the diaphragm 300 is close to the housing 100, the first auxiliary magnet 500 can extend into the first groove 310, and the first groove 310 can provide a space for the first auxiliary magnet 500, so that the first auxiliary magnet 500 can be prevented from occupying a large space, and the amplitude of the diaphragm 300 can be increased. The first auxiliary magnet 500 can be closer to the voice coil 400, so that the magnetic field enhancement effect of the first auxiliary magnet 500 is greater. In addition, the groove structure on the diaphragm 300 can prevent vibration from propagating along the surface of the diaphragm 300, thereby improving the sound performance of the speaker.

A second groove 211 is provided on the side of the central magnet 210 facing the diaphragm 300. A first protrusion 320 is formed on the side of the first groove 310 away from the notch. The first protrusion 320 is opposite to the notch of the second groove 211. When the diaphragm 300 is close to the central magnet 210, the first protrusion 320 can extend into the second groove 211. The second groove 211 can provide an accommodation space for the first protrusion 320, which can prevent the first protrusion 320 from occupying a large space and increase the amplitude of the diaphragm 300. In addition, the first auxiliary magnet 500 can be further brought closer to the voice coil 400, so that the magnetic field enhancement effect of the first auxiliary magnet 500 is further increased.

In the embodiment of the present application, when the diaphragm 300 is close to the housing 100, the first auxiliary magnet 500 extends into the first groove 310. Therefore, when the diaphragm 300 is close to the housing 100, the first groove 310 can provide a space for the first auxiliary magnet 500 to avoid noise caused by collision and interference, avoid the first auxiliary magnet 500 occupying a large space, and improve the amplitude of the diaphragm 300. When the diaphragm 300 is close to the central magnet 210, the first protrusion 320 extends into the second groove 211. Therefore, when the diaphragm 300 is close to the central magnet 210, the second groove 211 can provide a space for the first protrusion 320 to avoid noise caused by collision and interference, avoid the first protrusion 320 occupying a large space, and improve the amplitude of the diaphragm 300, thereby further increasing the volume of air pushed by the diaphragm 300, thereby achieving the needs of increasing the volume and improving the sound quality of the external speaker.

The magnetism of one end of the center magnet 210 close to the diaphragm 300 is opposite to the magnetism of one end of the side magnet 220 close to the diaphragm 300. It is ensured that the magnetic field formed by the center magnet 210 and the side magnet 220 can pass through the voice coil 400.

In the embodiment of the present application, a magnetic conductive sheet 600 may be provided on the central magnet 210 and the side magnets 220 . When the magnetic conductive sheet 600 is provided, the magnetic conductive sheet 600 is provided with a second groove 211 consistent with the central magnet 210 .

In the embodiment of the present application, when the first auxiliary magnet 500 extends into the first groove 310, the first auxiliary magnet 500 and the first groove 310 are limitedly matched in the extension direction of the surface of the diaphragm 300. For example, the width of the first groove 310 is slightly larger than the width of the first auxiliary magnet 500, so that the first auxiliary magnet 500 can extend into the first groove 310. Moreover, after the first auxiliary magnet 500 extends into the first groove 310, the first groove 310 can be limitedly matched with the first auxiliary magnet 500, so as to prevent the diaphragm 300 from vibrating along the extension direction of the surface of the diaphragm 300.

When the first protrusion 320 extends into the second groove 211, the first protrusion 320 and the second groove 211 are limitedly matched in the extension direction of the surface of the diaphragm 300. For example, the width of the second groove 211 is slightly larger than the width of the first protrusion 320, so that the first protrusion 320 can extend into the second groove 211. Moreover, after the first protrusion 320 extends into the second groove 211, the second groove 211 can be limitedly matched with the first protrusion 320, so as to prevent the diaphragm 300 from vibrating along the extension direction of the surface of the diaphragm 300.

In the prior art, when the voice coil 400 pushes the diaphragm 300 to move up and down, vibration may be generated at the position where the voice coil 400 and the diaphragm 300 are bonded, along the surface extension direction of the diaphragm 300. This vibration cannot push the air between the diaphragm 300 and the housing 100 to produce sound, but at certain frequencies, the diaphragm 300 will produce self-resonance and the entire surface of the diaphragm 300 will experience split vibration.

Therefore, in the embodiment of the present application, a first groove 310 is provided, and the groove structure on the diaphragm 300 can prevent vibration from propagating along the surface of the diaphragm 300, thereby improving the sound performance of the speaker. And the first groove 310 and the first auxiliary magnet 500 are limited and matched. A second groove 211 is also provided, and the second groove 211 and the first protrusion 320 are limited and matched. The first groove 310 and the second groove 211 can jointly prevent the diaphragm 300 from vibrating along the surface extension direction of the diaphragm 300, effectively preventing vibration from propagating along the surface of the diaphragm 300, thereby improving the sound performance of the speaker.

In the embodiment of the present application, the orthographic projection of the first auxiliary magnet 500 on the plane where the diaphragm 300 is located is located inside the orthographic projection of the voice coil 400 on the plane where the diaphragm 300 is located. Therefore, it can be ensured that the magnetic field formed between the first auxiliary magnet 500 and the side magnet 220 can pass through the voice coil 400.

The magnetism of one end of the center magnet 210 close to the diaphragm 300 is opposite to the magnetism of one end of the side magnet 220 close to the diaphragm 300 , and the magnetic field formed between the center magnet and the side magnet 220 can pass through the voice coil 400 .

The magnetism of the end of the first auxiliary magnet 500 close to the diaphragm 300 is the same as the magnetism of the end of the center magnet 210 close to the diaphragm 300. A closed magnetic field is not formed between the first auxiliary magnet 500 and the center magnet 210, but a closed magnetic field is formed between the first auxiliary magnet 500 and the side magnet 220. In addition, the magnetic field formed between the first auxiliary magnet 500 and the side magnet 220 can pass through the voice coil 400.

In the embodiment of the present application, the shell 100 has a sound outlet 110, which is located on one side of the shell 100. The cavity between the diaphragm 300 and the shell 100 is connected to the sound outlet 110. The up and down movement of the diaphragm 300 pushes the air between the diaphragm 300 and the shell 100 to make sound, and the sound is transmitted to the outside of the shell 100 through the sound outlet 110.

In the prior art, the sound outlet 110 is located on one side of the shell 100. The sound outlet 110 transmits sound waves, which may cause the diaphragm 300 to have different amplitudes in the area near the sound outlet 110 and the area far from the sound outlet 110 at the same time. In the area near the sound outlet 110, the amplitude of the diaphragm 300 is larger, and in the area far from the sound outlet 110, the amplitude of the diaphragm 300 is smaller. In other words, the diaphragm 300 may swing and vibrate.

Therefore, in the embodiment of the present application, the first auxiliary magnet 500 includes a first magnet portion 510 and a second magnet portion 520 which are arranged opposite to each other, the first magnet portion 510 is located between the sound outlet 110 and the second magnet portion 520, and the width of the first magnet portion 510 is smaller than the width of the second magnet portion 520. In this way, the width of the first magnet portion 510 is smaller, and the magnetic field formed by the first magnet portion 510 is weaker, while the width of the second magnet portion 520 is larger, and the magnetic field formed by the second magnet portion 520 is stronger. Therefore, the magnetic field formed by the first magnet portion 510 is different from the magnetic field formed by the second magnet portion 520, which can balance the amplitude of the diaphragm 300 and avoid the different amplitudes of the diaphragm 300 in the area close to the sound outlet 110 and the area far from the sound outlet 110.

Furthermore, the first auxiliary magnet 500 also includes a third magnet portion 530, and the two ends of the third magnet portion 530 are respectively connected to the first magnet portion 510 and the second magnet portion 520, and the width of the end of the third magnet portion 530 close to the first magnet portion 510 is smaller than the width of the end of the third magnet portion 530 close to the second magnet portion 520. The width of the end of the third magnet portion 530 close to the first magnet portion 510 is smaller, and the magnetic field formed is weaker. The width of the end of the third magnet portion 530 close to the second magnet portion 520 is larger, and the magnetic field formed is stronger. Therefore, the widths of the two ends of the third magnet portion 530 are different, and the magnetic fields formed are different, which can balance the amplitude of the diaphragm 300 and avoid the different amplitudes of the diaphragm 300 in the area close to the sound outlet 110 and the area far from the sound outlet 110.

Optionally, the width of the third magnet portion 530 gradually increases in the direction away from the sound outlet 110. That is, the width of the third magnet portion 530 gradually increases in the direction from the first magnet portion 510 to the second magnet portion 520. This makes the magnetic field formed by the third magnet portion 530 gradually increase in the direction away from the sound outlet 110. The third magnet portion 530 can not only help increase the magnetic field strength, but also gradually balance the amplitude of the diaphragm 300.

The connection between the third magnet part 530 and the first magnet part 510 and/or the connection between the third magnet part 530 and the second magnet part 520 has a rounded corner 550. Providing the rounded corner 550 at the connection can increase the width of the magnet part at the connection, thereby enhancing the magnetic field formed at the connection and increasing the magnetic force on the voice coil 400.

Specifically, the first auxiliary magnet 500 may be annular, and the first auxiliary magnet 500 includes a first magnet portion 510, a second magnet portion 520, a third magnet portion 530, and a fourth magnet portion 540 connected to each other. The first magnet portion 510 is opposite to the sound outlet 110. The second magnet portion 520 is opposite to the first magnet portion 510. The third magnet portion 530 and the fourth magnet portion 540 are located between the first magnet portion 510 and the second magnet portion 520, and are connected to the first magnet portion 510 and the second magnet portion 520, respectively. The width of the first magnet portion 510 is smaller than the width of the second magnet portion 520. In this way, the width of the first magnet portion 510 is small, and the magnetic field formed by the first magnet portion 510 is weak. The width of the second magnet portion 520 is large, and the magnetic field formed by the second magnet portion 520 is strong. Therefore, the magnetic field formed by the first magnet part 510 is different from the magnetic field formed by the second magnet part 520 , which can balance the amplitude of the diaphragm 300 and avoid different amplitudes of the diaphragm 300 near the sound outlet 110 and far from the sound outlet 110 .

The third magnet part 530 and the fourth magnet part 540 are connected to the first magnet part 510 and the second magnet part 520 respectively, and the widths of the third magnet part 530 and the fourth magnet part 540 can be set to be consistent. Of course, in the direction from the first magnet part 510 to the second magnet part 520, the widths of the third magnet part 530 and the fourth magnet part 540 can gradually increase. So that in the direction from the first magnet part 510 to the second magnet part 520, the magnetic field formed by the third magnet part 530 gradually strengthens, and the magnetic field formed by the fourth magnet part 540 also gradually strengthens. Therefore, the third magnet part 530 and the fourth magnet part 540 can not only help increase the magnetic field strength, but also balance the amplitude of the diaphragm 300 to avoid the different amplitudes of the diaphragm 300 in the area close to the sound outlet 110 and the area far from the sound outlet 110.

Accordingly, the first groove 310 includes a first groove portion 311 and a second groove portion 312 that are arranged oppositely. The first groove portion 311 is located between the second groove portion 312 and the sound outlet 110. In the case where the first auxiliary magnet 500 includes a first magnet portion 510 and a second magnet portion 520 that are arranged oppositely, the first magnet portion 510 can extend into the first groove portion 311, and the second magnet portion 520 can extend into the second groove portion 312. The width of the first groove portion 311 is smaller than the width of the second groove portion 312. The width of the first groove portion 311 near the sound outlet 110 area is smaller, so the rigidity is larger, so it is more difficult for the diaphragm 300 to vibrate at this location. The width of the second groove portion 312 far from the sound outlet 110 area is larger, so the rigidity is smaller, so it is easier for the diaphragm 300 to vibrate at this location. Therefore, the amplitude of the diaphragm 300 can be further balanced to avoid the different amplitudes of the diaphragm 300 near the sound outlet 110 area and the area far from the sound outlet 110.

Furthermore, the width of the first groove portion 311 is slightly greater than the width of the first magnet portion 510. The width of the second groove portion 312 is slightly greater than the width of the second magnet portion 520. Thus, the first magnet portion 510 can extend into the first groove portion 311, and the first magnet portion 510 and the first groove portion 311 can also be limitedly matched, and the second magnet portion 520 can extend into the second groove portion 312, and the second magnet portion 520 and the second groove portion 312 can also be limitedly matched.

In the embodiment of the present application, when the first auxiliary magnet 500 is annular, the first groove 310 is also annular. When the diaphragm 300 is close to the housing 100, the first auxiliary magnet 500 extends into the first groove 310. Both are set to be annular, which can ensure that the first auxiliary magnet 500 can be completely extended into the first groove 310.

Specifically, in the case where the first groove 310 is annular, the first groove 310 includes a first groove portion 311, a second groove portion 312, a third groove portion 313, and a fourth groove portion 314 that are connected. The first groove portion 311 is opposite to the sound outlet 110. The second groove portion 312 is opposite to the first groove portion 311. The third groove portion 313 and the fourth groove portion 314 are located between the first groove portion 311 and the second groove portion 312, and are connected to the first groove portion 311 and the second groove portion 312, respectively. The first groove portion 311, the second groove portion 312, the third groove portion 313, and the fourth groove portion 314 can be set to have the same width, and the width corresponds to the width of the wider magnet portion in the first auxiliary magnet 500. That is to say, the widths of the first groove portion 311, the second groove portion 312, the third groove portion 313 and the fourth groove portion 314 are slightly larger than the width of the wider magnet portion in the first auxiliary magnet 500, so that the first magnet portion 510 can extend into the first groove 310, and the first magnet portion 510 and the first groove 310 can also be limited and matched.

Optionally, corresponding to the width of the first magnet portion 510 being smaller than the width of the second magnet portion 520, the width of the first groove portion 311 is smaller than the width of the second groove portion 312. Furthermore, the width of the first groove portion 311 is slightly larger than the width of the first magnet portion 510, and the width of the second groove portion 312 is slightly larger than the width of the second magnet portion 520. This allows the first magnet portion 510 to extend into the first groove portion 311, and the first magnet portion 510 and the first groove portion 311 can also be limited in position. The second magnet portion 520 can extend into the second groove portion 312, and the second magnet portion 520 and the second groove portion 312 can also be limited in position.

Furthermore, the width of the first groove portion 311 is smaller than the width of the second groove portion 312, so that the width of the first groove portion 311 near the sound outlet 110 is smaller, and thus the rigidity is greater, so it is more difficult for the diaphragm 300 to vibrate there. The width of the second groove portion 312 far from the sound outlet 110 is larger, and thus the rigidity is smaller, so it is easier for the diaphragm 300 to vibrate there. Therefore, the amplitude of the diaphragm 300 is further balanced to avoid different amplitudes of the diaphragm 300 near the sound outlet 110 and far from the sound outlet 110.

The third groove portion 313 and the fourth groove portion 314 are connected to the first groove portion 311 and the second groove portion 312, respectively. The widths of the third groove portion 313 and the fourth groove portion 314 can be set to be consistent. Of course, in the direction from the first groove portion 311 to the second groove portion 312, the widths of the third groove portion 313 and the fourth groove portion 314 gradually increase. In the direction from the first groove portion 311 to the second groove portion 312, the width of the third groove portion 313 gradually increases, so that the rigidity of the third groove portion 313 gradually decreases, and the vibration of the diaphragm 300 gradually becomes easier. In the direction from the first groove portion 311 to the second groove portion 312, the width of the fourth groove portion 314 gradually increases, so that the rigidity of the fourth groove portion 314 gradually decreases, and the vibration of the diaphragm 300 gradually becomes easier. Therefore, the amplitude of the diaphragm 300 can be balanced to avoid the difference in the amplitude of the diaphragm 300 in the area close to the sound outlet 110 and the area far from the sound outlet 110.

Accordingly, the shape of the second groove 211 is consistent with the shape of the first protrusion 320 formed by the first groove 310, and the width of the second groove 211 may correspond to the width of the first protrusion 320. In other words, the width of the second groove 211 corresponds to the width of the first protrusion 320 everywhere, or the width of the second groove 211 is set to be consistent and corresponds to the maximum width of the first protrusion 320.

In the embodiment of the present application, a magnetic conductive layer is provided in the first groove 310. The diaphragm 300 may be made of a magnetic conductive material, or a coating made of a magnetic conductive material may be added in the first groove 310. Since the magnetic conductive layer has a strong magnetic conductivity, the magnetic field formed by the first auxiliary magnet 500 and the side magnet 220 may be gathered, so that the magnetic field may act on the voice coil 400 to a greater extent.

In the embodiment of the present application, the side magnet 220 may be in the shape of a ring or a bar. When the side magnet 220 is in the shape of a bar, there may be a plurality of side magnets 220. The plurality of side magnets 220 are distributed at intervals outside the central magnet 210.

The speaker may further include a second auxiliary magnet 700, which is disposed between the diaphragm 300 and the housing 100, and the second auxiliary magnet 700 is opposite to the space between the adjacent side magnets 220. A magnetic field is formed between the second auxiliary magnet 700 and the center magnet 210, which can increase the magnetic field strength at the space. In this case, the function of the second auxiliary magnet 700 is the same as that of the first auxiliary magnet 500.

Of course, a third auxiliary magnet 800 can also be arranged in the interval between adjacent side magnets 220. The third auxiliary magnet 800 can cooperate with the central magnet 210 to form a magnetic field to enhance the magnetic field in the interval. For example, the corner of the central magnet 210 corresponds to the interval between adjacent side magnets 220. The third auxiliary magnet 800 is arranged in the interval between adjacent side magnets 220 and is located at the corner of the central magnet 210. In this case, the role of the third auxiliary magnet 800 is the same as that of the side magnet 220.

For example, when the central magnet 210 is square, the side magnets 220 may be a plurality of bar-shaped side magnets 220. Each bar-shaped side magnet 220 is disposed opposite to one side of the central magnet 210. That is, no opposite side magnet 220 is disposed at the corner of the central magnet 210. The second auxiliary magnet 700 is opposite to the position where no opposite side magnet 220 is disposed, and a magnetic field is formed between the second auxiliary magnet 700 and the central magnet 210, which can increase the magnetic field strength at that location and increase the magnetic force on the voice coil 400. The third auxiliary magnet 800 may be disposed in the interval between adjacent side magnets 220 and located at the corner of the central magnet 210, and a magnetic field is formed between the third auxiliary magnet 800 and the central magnet 210, which can increase the magnetic field strength at that location and increase the magnetic force on the voice coil 400.

At least one of the connection between the first magnet part 510 and the third magnet part 530, the connection between the first magnet part 510 and the fourth magnet part 540, the connection between the second magnet part 520 and the third magnet part 530, and the connection between the second magnet part 520 and the fourth magnet part 540 is provided with a rounded corner 550. The rounded corner 550 protrudes toward the center of the first auxiliary magnet 500. There is no opposite side magnet 220 on the outside of the connection between the first magnet part 510 and the third magnet part 530, the connection between the first magnet part 510 and the fourth magnet part 540, the connection between the second magnet part 520 and the third magnet part 530, and the connection between the second magnet part 520 and the fourth magnet part 540. The rounded corner 550 is provided at the connection, so that the width of the magnet part at the connection can be increased, thereby strengthening the magnetic field formed by the first auxiliary magnet 500 at the connection, improving the magnetic field strength at the corner, and increasing the magnetic force on the voice coil 400.

In the above four joints, a rounded corner 550 may be provided at each joint, or at one or more of them. Optionally, when the width of the first magnet portion 510 is small, rounded corners 550 may be provided at the joints between the first magnet portion 510 and the third magnet portion 530 and the joints between the first magnet portion 510 and the fourth magnet portion 540, so as to increase the width of the magnet portion at the joints, thereby enhancing the magnetic field formed by the first auxiliary magnet 500 at the joints, increasing the magnetic field strength at the corners, and increasing the magnetic force on the voice coil 400.

In the embodiment of the present application, the first auxiliary magnet 500 and the second auxiliary magnet 700 are arranged on the side of the housing 100 facing the diaphragm 300, and the first auxiliary magnet 500 and the second auxiliary magnet 700 are embedded in the housing 100. The first auxiliary magnet 500 and the second auxiliary magnet 700 are arranged on the side of the housing 100 facing the diaphragm 300, so that the first auxiliary magnet 500 and the second auxiliary magnet 700 are respectively opposite to the central magnet 210 and the side magnet 220, so as to promote the first auxiliary magnet 500 and the side magnet 220 to form a magnetic field, and promote the second auxiliary magnet 700 and the central magnet 210 to form a magnetic field. The first auxiliary magnet 500 and the second auxiliary magnet 700 are embedded in the housing 100, which is convenient for the installation of the first auxiliary magnet 500 and the second auxiliary magnet 700. At the same time, a part of the first auxiliary magnet 500 and the second auxiliary magnet 700 is embedded in the housing 100, which can also reduce the occupied space of the first auxiliary magnet 500 and the second auxiliary magnet 700.

For example, the housing 100 includes a front cover 120 opposite to the diaphragm 300 , and the first auxiliary magnet 500 and the second auxiliary magnet 700 may be embedded in the front cover 120 of the housing 100 .

The embodiment of the present application also provides an electronic device, which includes the above-mentioned speaker. The speaker includes a housing 100, a magnet assembly 200, a diaphragm 300, a voice coil 400 and a first auxiliary magnet 500. The central magnet 210 and the side magnet 220 cooperate to form a magnetic field, and the voice coil 400 is located in the magnetic field. When an alternating current is passed through the voice coil 400, the voice coil 400 reciprocates in the magnetic field, thereby driving the diaphragm 300 to move, and then pushing the air to make a sound. The first auxiliary magnet 500 is arranged between the diaphragm 300 and the housing 100, and a magnetic field can be formed between the first auxiliary magnet 500 and the side magnet 220. The magnetic field formed by the first auxiliary magnet 500 and the side magnet 220 will also pass through the voice coil 400, increase the magnetic field strength in the area where the voice coil 400 is located, and thus increase the magnetic force on the voice coil 400. Even if the voice coil 400 moves to an area with a weaker magnetic field away from the center magnet 210 and the side magnet 220, the magnetic force on the voice coil 400 will be enhanced under the action of the first auxiliary magnet 500, thereby increasing the volume, improving the sound quality, and improving the sound performance of the speaker.

A first groove 310 is provided on the side of the diaphragm 300 facing the housing 100, and the first auxiliary magnet 500 is opposite to the notch of the first groove 310. When the diaphragm 300 is close to the housing 100, the first auxiliary magnet 500 can extend into the first groove 310. The first groove 310 can provide a storage space for the first auxiliary magnet 500, which can prevent the first auxiliary magnet 500 from occupying a large space and increase the amplitude of the diaphragm 300. In addition, the first auxiliary magnet 500 can be closer to the voice coil 400, so that the magnetic field enhancement effect of the first auxiliary magnet 500 is greater. In addition, the groove structure on the diaphragm 300 can prevent vibration from propagating along the surface of the diaphragm 300, thereby improving the sound performance of the speaker.

The electronic device disclosed in the embodiment of the present application may be a smart phone, a tablet computer, an e-book reader or a wearable device. Of course, the electronic device may also be other devices, which is not limited in the embodiment of the present application.

It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims (9)

1. A loudspeaker, characterized by comprising a housing (100), a magnet assembly (200), a diaphragm (300), a voice coil (400) and a first auxiliary magnet (500); The housing (100) has a receiving cavity (130); The magnet assembly (200) is arranged in the accommodating cavity (130), the magnet assembly (200) comprises a central magnet (210) and a side magnet (220), the side magnet (220) is arranged outside the central magnet (210), and a gap is provided between the side magnet (220) and the central magnet (210); The diaphragm (300) is arranged between the magnet assembly (200) and the housing (100); The voice coil (400) is arranged on a side of the diaphragm (300) close to the magnet assembly (200), and the voice coil (400) is opposite to the gap; The first auxiliary magnet (500) is arranged between the diaphragm (300) and the housing (100); A first groove (310) is provided on a side of the diaphragm (300) facing the housing (100), and the first auxiliary magnet (500) is opposite to a notch of the first groove (310); The orthographic projection of the first auxiliary magnet (500) on the plane where the diaphragm (300) is located is located inside the orthographic projection of the voice coil (400) on the plane where the diaphragm (300) is located. 2. The loudspeaker according to claim 1, characterized in that, when the diaphragm (300) is close to the shell (100), the first auxiliary magnet (500) extends into the first groove (310). 3. The loudspeaker according to claim 1, characterized in that a second groove (211) is provided on a side of the central magnet (210) facing the diaphragm (300), a first protrusion (320) is formed on a side of the first groove (310) away from the notch, the first protrusion (320) is opposite to the notch of the second groove (211), and when the diaphragm (300) is close to the central magnet (210), the first protrusion (320) extends into the second groove (211). 4. The loudspeaker according to claim 1 is characterized in that the magnetism of one end of the central magnet (210) close to the diaphragm (300) is opposite to the magnetism of one end of the side magnet (220) close to the diaphragm (300), and the magnetism of one end of the first auxiliary magnet (500) close to the diaphragm (300) is the same as the magnetism of one end of the central magnet (210) close to the diaphragm (300). 5. The loudspeaker according to claim 1, characterized in that the shell (100) has a sound outlet (110), the sound outlet (110) is located on one side of the shell (100), the first auxiliary magnet (500) comprises a first magnet portion (510) and a second magnet portion (520) which are arranged opposite to each other, the first magnet portion (510) is located between the sound outlet (110) and the second magnet portion (520), and the width of the first magnet portion (510) is smaller than the width of the second magnet portion (520). 6. The loudspeaker according to claim 5, characterized in that the first auxiliary magnet (500) further comprises a third magnet portion (530), two ends of the third magnet portion (530) are respectively connected to the first magnet portion (510) and the second magnet portion (520), and a width of an end of the third magnet portion (530) close to the first magnet portion (510) is smaller than a width of an end of the third magnet portion (530) close to the second magnet portion (520). 7. The loudspeaker according to claim 6, characterized in that, in a direction away from the sound outlet (110), the width of the third magnet portion (530) gradually increases; and/or A connection point between the third magnet portion (530) and the first magnet portion (510) and/or a connection point between the third magnet portion (530) and the second magnet portion (520) has a rounded corner (550). 8. The loudspeaker according to claim 1, characterized in that the shell (100) has a sound outlet (110), the sound outlet (110) is located on one side of the shell (100), the first groove (310) comprises a first groove portion (311) and a second groove portion (312), the first groove portion (311) is located between the second groove portion (312) and the sound outlet (110), and the width of the first groove portion (311) is smaller than the width of the second groove portion (312). 9. An electronic device, comprising the speaker according to any one of claims 1 to 8.