CN210298067U - Horn device - Google Patents

Abstract

The utility model relates to a horn device, which comprises a shell, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are arranged in the shell, and the vibration system comprises a driving coil and a vibrating diaphragm, wherein the driving coil can generate mechanical motion under the action of a magnetic field of the magnetic circuit system; the driving coil is planar, and the magnetic circuit system comprises at least one electromagnet. Because the driving circuit of the vibration system is in a plane type, the thickness of the horn device can be effectively reduced.

Description

Horn device

Technical Field

The utility model relates to an acoustics field, more specifically say, relate to a horn device.

Background

A horn device is an electro-acoustic element that functions to convert an electrical signal into an acoustic signal. With the current trend of thinning, the size requirement of the speaker device is more strict.

The horn device in the related art includes two kinds of moving iron units and moving coil units. The moving iron unit drives the vibrating diaphragm to vibrate through the driving rod, so that the vibrating diaphragm can vibrate and sound. The moving coil unit has relatively simple structure and low cost, but has irregular appearance and too large size.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in that, a modified horn device is provided.

The utility model provides a technical scheme that its technical problem adopted is: constructing a loudspeaker device, wherein the loudspeaker device comprises a shell, and a magnetic circuit system and a vibration system which are arranged in the shell, the vibration system comprises a driving coil and a vibrating diaphragm, the driving coil can generate mechanical motion under the action of a magnetic field of the magnetic circuit system, and the vibrating diaphragm is driven by the driving coil; the driving coil is planar, and the magnetic circuit system comprises at least one electromagnet.

In some embodiments, the at least one electromagnet comprises a plurality of electromagnets, the electromagnets being elongated and arranged in parallel spaced apart relationship; the polarities of every two adjacent electromagnets are staggered up and down; the driving coil comprises a plurality of straight sections; the straight sections are arranged corresponding to gaps among the electromagnets respectively; the magnetic circuit system further comprises a plurality of annular washers, and the annular washers are respectively arranged at the tops of the electromagnets.

In some embodiments, the drive coil is S-shaped.

In some embodiments, the at least one electromagnet comprises a plurality of electromagnets, the plurality of electromagnets comprises a central electromagnet located in the middle and a plurality of peripheral electromagnets arranged in a circular array around the central electromagnet, a gap is formed between each of the central electromagnet and the peripheral electromagnets, and the polarities of the central electromagnet and the peripheral electromagnets are staggered up and down; the drive coil is arranged corresponding to the gap.

In some embodiments, the plurality of electromagnets are cylindrical and the drive coil is circular.

In some embodiments, the at least one electromagnet comprises a plurality of electromagnets, each electromagnet is in an elongated shape, the electromagnets comprise a central electromagnet located in the middle, two side electromagnets arranged in parallel and spaced at two opposite sides of the central electromagnet, and two end electromagnets spaced and vertically distributed at two ends of the central electromagnet, and a gap is formed between the central electromagnet and each of the two side electromagnets and the two end electromagnets; the polarities of the central electromagnet, the two side electromagnets and the two end electromagnets are arranged in a vertically staggered mode, and the driving coils are arranged corresponding to the gaps.

In some embodiments, the magnetic circuit system comprises one electromagnet and two permanent magnets; the electromagnet and the permanent magnets are both in a strip shape, and the two permanent magnets are respectively arranged on two opposite sides of the electromagnet and are arranged in parallel at intervals; a gap is formed between the two permanent magnets and the electromagnet; the polarities of the electromagnets and the two permanent magnets are staggered up and down; the driving coil comprises two opposite straight sections, and the two straight sections are respectively arranged corresponding to the two gaps.

In some embodiments, the magnetic circuit system includes a magnetically conductive protrusion protruding toward the vibration system, the magnetically conductive protrusion penetrating the driving coil in a thickness direction.

In some embodiments, the drive coil comprises a hollow portion located in the middle, and the magnetic conductive protrusion penetrates through the drive coil via the hollow portion; the diaphragm comprises an avoiding part arched towards the direction far away from the magnetic circuit system; the vibrating diaphragm comprises a plane portion for the driving coil to be arranged, and the avoiding portion is formed in the middle of the plane portion.

In some embodiments, the drive coil is in the shape of a racetrack ring.

Implement the utility model discloses a horn device has following beneficial effect: because the driving circuit of the vibration system is in a plane type, the thickness of the horn device can be effectively reduced.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic perspective view of a speaker device according to a first embodiment of the present invention;

FIG. 2 is a schematic sectional view taken along the line A-A of the speaker unit shown in FIG. 1;

FIG. 3 is a schematic perspective exploded view of the speaker assembly of FIG. 1;

fig. 4 is a schematic perspective view of a speaker device according to a second embodiment of the present invention;

FIG. 5 is a schematic perspective exploded view of the speaker assembly of FIG. 4;

fig. 6 is a schematic perspective view of a speaker device according to a third embodiment of the present invention;

FIG. 7 is a schematic perspective exploded view of the speaker assembly of FIG. 6;

FIG. 8 is a schematic perspective exploded sectional view of the speaker assembly of FIG. 6;

fig. 9 is a schematic perspective view of a speaker device according to a fourth embodiment of the present invention;

FIG. 10 is a schematic perspective exploded view of the speaker assembly of FIG. 9;

fig. 11 is a schematic partial perspective view of a speaker device according to a fifth embodiment of the present invention;

FIG. 12 is a schematic perspective exploded view of the speaker assembly of FIG. 11;

fig. 13 is a schematic partial perspective view of a speaker device according to a sixth embodiment of the present invention;

fig. 14 is a schematic perspective view of a speaker device according to a seventh embodiment of the present invention;

FIG. 15 is a schematic perspective exploded view of the speaker assembly of FIG. 14;

fig. 16 is a schematic longitudinal sectional view of the speaker unit of fig. 14.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate that the device or element referred to must have a specific direction, and thus, should not be construed as limiting the present invention.

Fig. 1 to fig. 3 show a speaker device 1 according to a first embodiment of the present invention, where the speaker device 1 can be used in electronic products such as earphones and mobile phones, and converts an electrical signal into a mechanical motion, and finally into a sound signal. The speaker device 1 may include a housing 110, a magnetic circuit system 120 disposed in the housing 110, and a vibration system 130 disposed in the housing 110 and movable by the magnetic circuit system 120. In some embodiments, the magnetic circuit system 120 may be disposed on the bottom wall of the housing 110, and the vibration system 130 is disposed directly above the magnetic circuit system 120. The housing 110 may have a rectangular parallelepiped shape in some embodiments, and may include a lower housing 111 and an upper housing 112 coupled to the lower housing 111. The lower case 111 and the upper case 112 are combined together to define an installation space in which the magnetic circuit system 120 and the vibration system 130 are accommodated.

The magnetic circuit system 120 may include an electromagnet 121 and a magnetizer 122 disposed on the top of the electromagnet 121 in some embodiments, and the electromagnet 121 may include a rectangular iron core 1211 laid on the bottom wall of the lower housing 111 and a racetrack-type driving coil 1212 wound around the side wall of the iron core 1211 in some embodiments. The magnetic conductor 122 may be in the form of a plate in some embodiments, which is shaped and sized to fit the electromagnet 121. The magnetic circuit system 120 may further include a controller (not shown) connected to the driving coil 1212, and the controller is configured to control the current flowing through the driving coil 1212 to control the magnitude of the electromagnetic field force of the electromagnet 121, so as to control the sensitivity of the speaker unit 1. The advantages of the magnetic circuit system 120 are more obvious than those of a magnetic circuit system using only permanent magnets.

The vibration system 130 in some embodiments includes a planar diaphragm 131 horizontally disposed above the magnetic circuit 120, and a driving coil 132 coupled to a bottom surface of the diaphragm 131, the driving coil 132 may be wound in a race-track loop shape using a wire and surrounds the electromagnet 121, and the driving coil 132 may be one or more layers. After the driving coil 132 is powered on, the driving coil can move under the action of the magnetic circuit system 120, and drives the diaphragm 131 to move to generate sound. The diaphragm 131 in some embodiments includes a planar portion 1311 and a domed mylar 1312 attached to a periphery of the planar portion 1311. The diaphragm 131 is connected to the housing 110 via a mylar film 1312.

Fig. 4 and 5 show a horn device 2 according to a second embodiment of the present invention, and the horn device 2 may include a housing 210, a magnetic circuit system 220 disposed in the housing 210, and a vibration system 230 disposed in the housing 210 and movable under the action of the magnetic circuit system 220. In some embodiments, the magnetic circuit system 220 may be disposed on the bottom wall of the housing 210, and the vibration system 230 is disposed directly above the magnetic circuit system 220. The housing 210 may be circular in some embodiments, and may include a lower housing 211 and an upper housing (not) that mates with the lower housing 211. The lower case 211 and the upper case are combined together to define an installation space in which the magnetic circuit system 220 and the vibration system 230 are accommodated.

The magnetic circuit system 220 may comprise an array of a plurality of electromagnets 221 in some embodiments. Each of the electromagnets 221 has an elongated shape, and the electromagnets 221 are arranged in parallel at intervals, with a gap 222 formed between adjacent electromagnets 221. Each electromagnet 221 includes an elongated core 2211 and a coil 2212 wound around the side walls of the core. The polarities of the adjacent electromagnets 221 are staggered up and down, that is, if the upper end of one electromagnet 221 is an N-pole, the upper end of the adjacent electromagnet 221 is an S-pole. The magnetic circuit system 220 may further include a controller (not shown) connected to the electromagnets 221 respectively, and the controller is used to control the current flowing through the coils 2212 of the electromagnets 221 so as to control the magnitude of the electromagnetic field force of the electromagnets 221, thereby controlling the sensitivity of the horn device 2.

The vibration system 230 in some embodiments includes a planar diaphragm 231 horizontally disposed above the magnetic circuit 220, and a planar driving coil 232 bonded to a surface of the diaphragm 231, wherein the driving coil 232 may be formed on the surface of the diaphragm 231 by printing, etching, thermoforming, gluing, or laser etching, and may be formed on a lower surface and/or an upper surface of the diaphragm 231. The diaphragm 231 may include a flexible circuit board in some embodiments. The driving coil 232 may include several straight segments 2321 in some embodiments, and the straight segments 2321 are respectively disposed corresponding to the gaps 222 between the electromagnets 221. In operation, according to the left-hand rule, when the drive coil 232 is energized, the straight segments 2321 will be forced upward or downward in the horizontal magnetic field directly above the gap 222 of the magnetic circuit system 220, thereby generating motion.

Fig. 6 to 8 show a speaker unit 3 according to a third embodiment of the present invention, in which the speaker unit 3 may include a housing 310, a magnetic circuit system 320 disposed in the housing 310, and a vibration system 330 disposed in the housing 310 and movable by the magnetic circuit system 320. In some embodiments, the magnetic circuit system 320 may be disposed on the bottom wall of the housing 310, and the vibration system 330 is disposed directly above the magnetic circuit system 320. The housing 310 may be circular in some embodiments, and may include a lower housing 311 and an upper housing (not) that mates with the lower housing 311. The lower case 311 and the upper case are combined together to define an installation space in which the magnetic circuit system 320 and the vibration system 330 are accommodated.

The magnetic circuit system 320 may include an array of a plurality of electromagnets 321 in some embodiments. Each electromagnet 321 is cylindrical, the electromagnets 321 include a central electromagnet 321 located in the middle and several peripheral electromagnets 321 arranged around the central electromagnet 321 in a circular array, and a gap 322 is formed between the central electromagnet 321 and the peripheral electromagnets 321. Each electromagnet 321 includes a cylindrical iron core 3211 and a coil 3212 wound around a side wall of the iron core 3211. The polarities of the central electromagnets 321 and the peripheral electromagnets 321 are staggered up and down, that is, if the upper end of the central electromagnet 321 is an N pole, the upper end of the peripheral electromagnet 321 is an S pole. The magnetic circuit system 320 may further include a controller (not shown) connected to the electromagnets 321 respectively, and the controller is used to control the current flowing through the coils 3212 of the electromagnets 321 to control the magnitude of the electromagnetic field force of the electromagnets 321, so as to control the sensitivity of the speaker unit 3. In some embodiments, the central electromagnet 321 is larger than the size of the peripheral electromagnets 321.

The vibration system 330 in some embodiments includes a planar diaphragm 331 horizontally disposed above the magnetic circuit 220, and a planar driving coil 332 coupled to a surface of the diaphragm 331, wherein the driving coil 332 may be formed by spirally winding a conducting wire, and may be coupled to a lower surface and/or an upper surface of the diaphragm 331 by bonding or the like. The driving coil 332 may have a circular ring shape in some embodiments and be disposed corresponding to the gap 322 between the central electromagnet 321 and the peripheral electromagnets 321. In operation, according to the left-hand rule, when the drive coil 332 is energized, it is subjected to an upward or downward force in the horizontal magnetic field directly above the gap 322 of the magnetic circuit system 320, thereby generating a motion.

Fig. 9 and 10 show a speaker unit 4 according to a fourth embodiment of the present invention, where the speaker unit 4 may include a housing 410, a magnetic circuit system 420 disposed in the housing 410, and a vibration system 430 disposed in the housing 410 and movable under the action of the magnetic circuit system 420. In some embodiments, the magnetic circuit system 420 may be disposed on the bottom wall of the housing 410, and the vibration system 430 is disposed directly above the magnetic circuit system 420. The housing 410 may be rectangular in some embodiments, and may include a lower housing 411 and an upper housing 412 that mates with the lower housing 411. The lower case 411 and the upper case 412 are combined together to define an installation space in which the magnetic circuit system 420 and the vibration system 430 are accommodated.

The magnetic circuit system 420 may comprise an array of a plurality of electromagnets 421 in some embodiments. Each electromagnet 421 is in a shape of an elongated strip, the electromagnets 421 include a central electromagnet 421 located in the middle, side electromagnets 421 spaced in parallel on two opposite sides of the central electromagnet 421, and end electromagnets 421 spaced and vertically distributed on two ends of the central electromagnet 421, and gaps 422 are formed between the central electromagnet 421 and the side electromagnets 421 and between the end electromagnets 421. Each electromagnet 421 includes an elongated iron core 4211 and a coil 4212 wound around the side wall of the iron core 4211. The polarity of the central electromagnet 421 and the side electromagnets 421 and the end electromagnets 421 are staggered up and down, that is, if the upper end of the central electromagnet 421 is N-pole, the upper ends of the side electromagnets 421 and the end electromagnets 421 are S-pole. The magnetic circuit system 420 may further include a controller (not shown) respectively connected to the electromagnets 421, and the controller is configured to control the current flowing through the coils 4212 of the electromagnets 421 to control the magnitude of the electromagnetic field force of the electromagnets 421, so as to control the sensitivity of the horn device 4.

The vibration system 430 in some embodiments includes a planar diaphragm 431 horizontally disposed above the magnetic circuit 420, and a planar driving coil 432 bonded to a surface of the diaphragm 431, wherein the driving coil 432 may be formed by spirally winding a conductive wire, and may be bonded to a lower surface and/or an upper surface of the diaphragm 431 by bonding or the like. The driving coil 432 may have a race track ring type in some embodiments and be disposed corresponding to the gap 422 between the center electromagnet 421 and the side and end electromagnets 421. In operation, according to the left-hand rule, when the drive coil 432 is energized, it is subjected to an upward or downward force in the horizontal magnetic field directly above the gap 422 of the magnetic circuit 420, thereby generating motion.

Fig. 11 and 12 show a speaker unit 5 according to a fifth embodiment of the present invention, in which the speaker unit 5 may include a housing 510, a magnetic circuit system 520 disposed in the housing 510, and a vibration system 530 disposed in the housing 510 and movable under the action of the magnetic circuit system 520. In some embodiments, the magnetic circuit system 520 may be disposed on the bottom wall of the housing 510, and the vibration system 530 is disposed directly above the magnetic circuit system 520. The housing 510 may be rectangular in some embodiments, and may include a lower housing 511 and an upper housing that mates with the lower housing 511. The lower case 511 and the upper case are combined together to define an installation space in which the magnetic circuit system 520 and the vibration system 530 are accommodated.

The magnetic circuit system 520 may comprise an array of a plurality of electromagnets 521 in some embodiments. Each electromagnet 521 is in a shape of a long strip, the electromagnets 521 are arranged in parallel at intervals, and a gap 522 is formed between the adjacent electromagnets 521. Each electromagnet 521 includes an elongated core 5211 and a coil 5212 wound around the sidewall of the core 5211. The polarities of the adjacent electromagnets 521 are staggered up and down, that is, if the upper end of one electromagnet 521 is an N pole, the upper end of the adjacent electromagnet 521 is an S pole. The magnetic circuit system 520 may further include a controller (not shown) connected to the electromagnets 521 respectively, and the controller is used to control the current flowing through the coils 5212 of the electromagnets 521 to control the magnitude of the electromagnetic field force of the electromagnets 521, so as to control the sensitivity of the horn device 5. The magnetic circuit system 520 may include a plurality of ring-shaped washers 523, in some embodiments, the washers 523 respectively cover the top of the coils 5212 of the electromagnets 521, and are adapted in shape and size to the corresponding coils 5212.

The vibration system 530 in some embodiments includes a planar diaphragm (not shown) horizontally disposed above the magnetic circuit 520 and a planar drive coil 532 coupled to a surface of the diaphragm, wherein the drive coil 532 may be spirally wound with a wire, and may be coupled to a lower surface and/or an upper surface of the diaphragm by bonding or the like. The driving coil 532 may have an S-shape in some embodiments, and includes a plurality of straight sections 5321, the straight sections 5321 are disposed corresponding to the gaps 522. In operation, according to the left-hand rule, when the drive coil 532 is energized, it experiences an upward or downward force in the horizontal magnetic field directly above the gap 522 of the magnetic circuit 520, thereby producing motion.

Fig. 13 shows a horn device 6 according to a sixth embodiment of the present invention, and the horn device 6 may include a housing 610, a magnetic circuit system 620 disposed in the housing 610, and a vibration system (not shown) disposed in the housing 610 and movable by the magnetic circuit system 620. In some embodiments, the magnetic circuit system 620 may be disposed on the bottom wall of the housing 610, and the vibration system is disposed directly above the magnetic circuit system 620. The housing 610 may be rectangular in some embodiments, and may include a lower housing 611 and an upper housing that mates with the lower housing 611. The lower case 611 and the upper case are combined together to define an installation space in which the magnetic circuit system 620 and the vibration system are accommodated.

The magnetic circuit system 620 may include one electromagnet 621 and two permanent magnets 624 in some embodiments. The electromagnet 621 and the permanent magnet 624 are both long, and the two permanent magnets 624 are respectively disposed on two opposite sides of the electromagnet 621 and arranged in parallel at intervals. A gap 622 is formed between the permanent magnet 624 and the electromagnet 621. The electromagnet 621 includes an elongated iron core 6211 and a coil 6212 surrounding the side wall of the iron core 6211. The polarities of the electromagnets 621 and the permanent magnets 624 are staggered up and down, that is, if the upper end of the electromagnet 621 is an N pole, the upper end of the permanent magnet 624 is an S pole. The magnetic circuit system 620 may further include a controller (not shown) connected to the electromagnets 621 in some embodiments, and the controller is configured to control the current flowing through the coils 6212 of the electromagnets 621 so as to control the magnitude of the electromagnetic field force of the electromagnets 621, thereby controlling the sensitivity of the speaker device 6.

Fig. 14 and 15 show a horn device 7 according to a seventh embodiment of the present invention, in which the horn device 7 may include a housing 710, a magnetic circuit system 720 disposed in the housing 710, and a vibration system 730 disposed in the housing 710 and movable by the magnetic circuit system 720. In some embodiments, the magnetic circuit system 720 may be disposed on the bottom wall of the housing 710, and the vibration system 730 is disposed directly above the magnetic circuit system 720. The housing 710 may be rectangular in some embodiments, and may include a lower housing 711 and an upper housing 712 that mates with the lower housing 711. The lower case 711 and the upper case 712 are combined together to define an installation space in which the magnetic circuit system 720 and the vibration system 730 are accommodated.

Magnetic circuit 720 may include one electromagnet 721 and two permanent magnets 724 in some embodiments. The electromagnet 721 and the permanent magnet 724 are both long, and the two permanent magnets 724 are respectively arranged on two opposite sides of the electromagnet 721 and are arranged in parallel at intervals. A gap 722 is formed between the permanent magnet 724 and the electromagnet 721. The electromagnet 721 includes an elongated core 7211 and a coil 7212 wound around the sidewall of the core 7211. The polarities of the electromagnets 721 and the permanent magnets 724 are staggered up and down, that is, if the upper end of the electromagnet 721 is the N pole, the upper end of the permanent magnet 724 is the S pole. The magnetic circuit system 720 may further comprise a controller (not shown) connected to the electromagnets 721 in some embodiments, the controller being configured to control the current flowing through the coils 7212 of the electromagnets 721 to control the magnitude of the electromagnetic field force of the electromagnets 721, thereby controlling the sensitivity of the horn device 7.

Referring to fig. 16, the magnetic circuit system 720 may further include a magnetic conductive protrusion 725 disposed on the top of the core 7211 of the electromagnet 721 in some embodiments, and the magnetic conductive protrusion 725 can be close to or deep into the middle of the planar driving coil 732 of the vibration system 730 to improve the vibration efficiency. Specifically, since the driving coil 732 is a ring-shaped planar coil, and the magnetic field generated after the driving coil 732 is energized has the strongest magnetic force at the center of the driving coil 732, if the main magnetic field of the magnetic circuit system 720 is below the entire driving coil 732, the main magnetic field cannot be optimally matched with the maximum force-receiving position of the magnetic field of the driving coil 732. Therefore, when a magnetic conductive protrusion 725 is added to the electromagnet 721, and the magnetic conductive protrusion 725 is placed at the center of the magnetic field of the driving coil 732, where the force applied to the driving coil 732 is the largest, the amplitude is increased, and the overall sensitivity of the horn device 7 is improved. In some embodiments, the magnetically permeable protrusions 725 are not limited to application to the electromagnets 721, but may be applied to permanent magnets.

The vibration system 730 in some embodiments includes a planar diaphragm 731 horizontally disposed above the magnetic circuit 720, and a planar driving coil 732 attached to a surface of the diaphragm 731, wherein the driving coil 732 is formed by spirally winding a conductive wire, and is attached to a lower surface and/or an upper surface of the diaphragm 731 by bonding or the like. The driving coil 732 may have a race track type in some embodiments, and includes two opposite flat sections 7321 and a hollow portion 7320 between the two flat sections 7321, where the flat sections 7321 are disposed corresponding to the gap 722. In operation, according to the left-hand rule, when the drive coil 732 is energized, it is subjected to an upward or downward force in the horizontal magnetic field directly above the gap 722 of the magnetic circuit 720, thereby generating motion. The diaphragm 731 is provided with a dome-shaped avoiding portion 7310, which is arched outward, corresponding to the hollow portion 7320, so as to form a magnetic conductive protrusion 725, which can extend into the spherical-shaped avoiding portion, so that the magnetic conductive protrusion 725 can penetrate from one side of the driving coil 732 to the other side, and the magnetic field concentration area of the magnetic circuit system 720 is guided to extend to or close to the maximum force-bearing position of the driving coil 732.

The diaphragm 731 in some embodiments includes a planar portion 7311 and a curved mylar film 7312 attached to the periphery of the planar portion 7311. The diaphragm 731 is connected to the housing 710 via a mylar film 7312. The avoiding portion 7310 is formed in the middle of the planar portion 7311 and is used to prevent the diaphragm 731 from touching the magnetic conductive protrusion 725 during vibration.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A loudspeaker device comprises a shell, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are arranged in the shell, and the vibration system comprises a driving coil and a vibrating diaphragm, wherein the driving coil can generate mechanical motion under the action of a magnetic field of the magnetic circuit system; characterized in that the drive coil is planar and the magnetic circuit comprises at least one electromagnet.

2. The horn apparatus of claim 1, wherein said at least one electromagnet comprises a plurality of electromagnets, the electromagnets being elongated and arranged in parallel spaced apart relationship; the polarities of every two adjacent electromagnets are staggered up and down; the driving coil comprises a plurality of straight sections; the straight sections are arranged corresponding to gaps among the electromagnets respectively; the magnetic circuit system further comprises a plurality of annular washers, and the annular washers are respectively arranged at the tops of the electromagnets.

3. A horn device according to claim 2, wherein the drive coil is S-shaped.

4. The horn device according to claim 1, wherein the at least one electromagnet comprises a plurality of electromagnets, the plurality of electromagnets comprises a central electromagnet located in the middle and a plurality of peripheral electromagnets arranged in a circular array around the central electromagnet, a gap is formed between the central electromagnet and the peripheral electromagnets, and the polarities of the central electromagnet and the peripheral electromagnets are staggered up and down; the drive coil is arranged corresponding to the gap.

5. The horn apparatus of claim 4, wherein the plurality of electromagnets have a cylindrical shape and the driving coil has a circular ring shape.

6. The horn apparatus of claim 1, wherein the at least one electromagnet comprises a plurality of electromagnets, each electromagnet being elongated, the electromagnets comprising a center electromagnet located in a middle portion, two side electromagnets spaced apart in parallel on opposite sides of the center electromagnet, and two end electromagnets spaced apart and distributed perpendicularly on opposite ends of the center electromagnet, the center electromagnet having a gap formed between the two side electromagnets and the two end electromagnets; the polarities of the central electromagnet, the two side electromagnets and the two end electromagnets are arranged in a vertically staggered mode, and the driving coils are arranged corresponding to the gaps.

7. The horn apparatus of claim 1, wherein the magnetic circuit system comprises one electromagnet and two permanent magnets; the electromagnet and the permanent magnets are both in a strip shape, and the two permanent magnets are respectively arranged on two opposite sides of the electromagnet and are arranged in parallel at intervals; a gap is formed between the two permanent magnets and the electromagnet; the polarities of the electromagnets and the two permanent magnets are staggered up and down; the driving coil comprises two opposite straight sections, and the two straight sections are respectively arranged corresponding to the two gaps.

8. The horn device according to any one of claims 1 to 7, wherein the magnetic circuit system includes a magnetically conductive projection projecting toward the vibration system, the magnetically conductive projection penetrating the drive coil in a thickness direction.

9. The speaker device according to claim 8, wherein the drive coil includes a hollow portion in a central portion thereof, and the magnetically conductive protrusion penetrates the drive coil through the hollow portion; the diaphragm comprises an avoiding part arched towards the direction far away from the magnetic circuit system; the vibrating diaphragm comprises a plane portion for the driving coil to be arranged, and the avoiding portion is formed in the middle of the plane portion.

10. The horn device of claim 6 or 7, wherein the drive coil is in the shape of a racetrack ring.

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