Circuit and sound producing device

Abstract

The application provides a circuit, which comprises a first sound signal input end, a second sound signal input end, a power amplifier, a capacitor, a low-frequency sound emitting module and a high-frequency sound emitting module, the first sound signal input end is used for receiving a sound signal with high pitch and low pitch, and the second sound signal input end is used for receiving a voice signal; the first sound signal input end is connected to a positive input end of the power amplifier; a negative input end of the power amplifier is connected to the ground; an output end of the power amplifier is connected to an input end of the low-frequency sound emitting module and a first end of the capacitor respectively; a second end of the capacitor is connected to a first input end of the high-frequency sound emitting module; and the second sound signal input end is connected to a second input end of the high-frequency sound emitting module. The application also provides a sound emitting device applying the circuit provided by the application. Compared with the related art, the power amplifier adopting the technical scheme of the application has the advantages of less quantity, simple structure and wide application.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electro-acoustic conversion, and in particular to a circuit and a sound generating device for use in portable electronic products.

BACKGROUND

[0002] Sound generating devices are widely used in portable electronic products, such as mobile phones, to convert audio signals into sound for playing. Sound generating devices have high loudness and good effects of low-frequency sound and high-frequency sound. The circuit for driving the sound generating device is also an important part of the portable electronic product.

[0003] The sound generating device circuit of the related art includes multiple sound generating devices, a power amplifier, and a capacitor.

[0004] However, the sound generating device circuit of the related art requires multiple sound generating devices in terminal device applications, such as multiple sound generating devices on a mobile phone to realize the emission of low-frequency sound, the emission of high-frequency sound, and the use as a receiver. Please refer to Figure 1 , Figure 1 The structural diagram of one of the application scenarios of the sound generating device of the related art on a terminal device is as follows: one power amplifier P1 is used to realize the emission of low-frequency sound and the emission of high-frequency sound. In specific applications, a music signal device S1 divides the music signal into two signals after the music signal passes through the power amplifier P1, one of the signals is directly sent to a low-frequency speaker U1, and the other signal is sent to a high-frequency speaker U2 after passing through a series capacitor C. In addition, a voice signal device S2 sends a voice signal to a receiver U3. The high-frequency speaker U2 and the receiver U3 in this application scenario are two independent speakers, and the corresponding driving is also separated. Please refer to Figure 2 , Figure 2 The structural diagram of another application scenario of the sound generating device of the related art on a terminal device is as follows: a music signal device S1 sends its music signal to a low-frequency speaker U1 after the music signal passes through a power amplifier P1, a music signal device S2 sends its music signal to a low-frequency speaker U2 after the music signal passes through a power amplifier P2 and a capacitor C in series, and a voice signal device S2 sends a voice signal to a receiver U3. The low-frequency speaker U, the high-frequency speaker U2, and the receiver U3 in this application scenario are three independent speakers, and the corresponding driving is also separated, at least two power amplifiers are required. The above technical solution has the problems of multiple devices and complex driving circuit, which is not conducive to integrated applications.

[0005] Therefore, it is necessary to provide a new circuit and sound generating device to solve the above technical problems.

SUMMARY

[0006] The purpose of the present application is to provide a circuit and a sound generating device with a small number of power amplifiers, a simple structure, and wide applications.

[0007] In order to achieve the above object, in a first aspect, the present application provides a circuit applied to a sound emitting device, the circuit comprising a first sound signal input end, a second sound signal input end, a power amplifier, a capacitor, a low frequency sound emitting module and a high frequency sound emitting module, the first sound signal input end being used for receiving a sound signal with high and low pitch, the second sound signal input end being used for receiving a voice signal; the first sound signal input end being connected to a positive input end of the power amplifier; a negative input end of the power amplifier being connected to a ground; an output end of the power amplifier being connected to an input end of the low frequency sound emitting module and a first end of the capacitor respectively; a second end of the capacitor being connected to a first input end of the high frequency sound emitting module; the second sound signal input end being connected to a second input end of the high frequency sound emitting module.

[0008] In a second aspect, the present application further provides a sound emitting device, the sound emitting device applying the above-mentioned circuit provided by the present application, the sound emitting device comprising a first vibration system for vibrating to emit low pitch and a second vibration system for vibrating to emit high pitch, and the second vibration system can also be used as a receiver function sound emitting device; wherein an output end of the power amplifier is connected to the first vibration system; and a second end of the capacitor and the second sound signal input end are both connected to the second vibration system.

[0009] Preferably, the sound emitting device further comprises a yoke and a magnetic circuit system fixed to the yoke, the first vibration system and the second vibration system are coaxially arranged and located on opposite sides of the magnetic circuit system respectively; the first vibration system comprises a first diaphragm fixed to the yoke and a first voice coil fixed to the first diaphragm; the second vibration system comprises a second diaphragm fixedly supported on the magnetic circuit system and a second voice coil driving the second diaphragm to vibrate to emit sound; the magnetic circuit system comprises a first magnetic gap and a second magnetic gap, the first magnetic gap is arranged around the second magnetic gap; the first voice coil is inserted into the first magnetic gap and drives the first diaphragm to vibrate to emit low sound, and the second voice coil is inserted into the second magnetic gap and drives the second diaphragm to vibrate to emit high sound.

[0010] Preferably, the magnetic circuit system comprises a magnetic yoke, a main magnetic steel group fixed to the magnetic yoke near the first diaphragm, and a vice magnetic steel group surrounding the main magnetic steel group, the vice magnetic steel group and the main magnetic steel group are spaced apart to form the first magnetic gap, and the magnetic yoke is annular; the main magnetic steel group comprises a main magnetic steel in the form of a ring, a main pole core fixed to the main magnetic steel away from the magnetic yoke, and an auxiliary magnetic steel, the inner wall of the main magnetic steel and the inner wall of the magnetic yoke jointly form an inner cavity; the main pole core comprises a main pole core body fixed to the main magnetic steel and a main pole core protruding part extending to the inner cavity from the inner periphery of the main pole core body, and the auxiliary magnetic steel is fixed to the main pole core body away from the magnetic yoke; the main magnetic steel and the magnetic yoke jointly surround the main pole core protruding part and jointly form the second magnetic gap with the main pole core protruding part, and the second magnetic gap is open to the second vibration system; and the main pole core protruding part is in the form of a hollow ring.

[0011] Preferably, the sound generating device further comprises a support frame in the form of a ring, the support frame is fixed to the magnetic yoke away from the basin frame, and the periphery of the second diaphragm is supported and fixed to the support frame away from the magnetic yoke; the magnetic circuit system and the second vibration system jointly form a lower cavity, and the lower cavity is in communication with the second magnetic gap.

[0012] Preferably, the second diaphragm comprises a second diaphragm vibration part spaced apart from the magnetic yoke, a second diaphragm folded ring part bent and extended from the outer periphery of the second diaphragm vibration part, and a second diaphragm connecting part bent and extended from the second diaphragm folded ring part to the support frame; the second diaphragm connecting part is fixed to the support frame; the second vibration system further comprises a second skeleton, one side of the second skeleton near the magnetic circuit system is fixed to the second voice coil, and the other side of the second skeleton away from the magnetic circuit system is fixed to the second diaphragm vibration part.

[0013] Preferably, the second skeleton comprises a first fixed part in the form of a ring, a spring arm bent and extended from the inner side of the first fixed part, and a second fixed part extended from the spring arm away from the first fixed part, the second diaphragm connecting part and the support frame are respectively fixed to opposite sides of the first fixed part, and the second diaphragm vibration part and the second voice coil are respectively fixed to opposite sides of the second fixed part; the vice magnetic steel group comprises a vice magnetic steel fixed to the magnetic yoke and a vice pole core fixed to the vice magnetic steel away from the magnetic yoke; the second skeleton further comprises a third fixed part bent and extended from the outer side of the first fixed part to the direction of the basin frame; the vice pole core is fixed to the basin frame, and the third fixed part is fixed to the vice pole core away from the basin frame; the basin frame is in the form of a rectangle; the vice pole core comprises two, and the two vice pole cores are respectively located on opposite sides of the long axis of the basin frame.

[0014] Preferably, the first vibrating diaphragm is ring-shaped, and the inner circumferential side of the first vibrating diaphragm is fixed to the auxiliary magnetic steel, and the outer circumferential side of the first vibrating diaphragm is fixed to the yoke.

[0015] Preferably, the first vibrating system further comprises a first skeleton in a ring shape, and the first voice coil is fixed to one side of the first skeleton close to the magnetic circuit system; the first vibrating diaphragm comprises a first ring-shaped folding ring and a second ring-shaped folding ring, the first folding ring is arranged around the second folding ring and is spaced from the first folding ring, the second folding ring is arranged around the auxiliary magnetic steel, the inner circumferential side of the second folding ring is fixed to the outer side of the auxiliary magnetic steel, the first skeleton acts as a ball top of the first vibrating diaphragm, the outer circumferential side of the first skeleton is fixed to the inner circumferential side of the first folding ring, the inner circumferential side of the first skeleton is fixed to the outer circumferential side of the second folding ring, and the outer circumferential side of the first folding ring is fixed to the yoke.

[0016] Preferably, the first skeleton comprises a first segment in a ring shape, a second segment bent and extended from the inner circumferential side of the first segment to the first voice coil, and a third segment bent and extended from the inner circumferential side of the first segment to the direction of the magnetic yoke; the first voice coil is fixed to one side of the second segment close to the magnetic yoke, and the side of the second segment away from the magnetic yoke is fixed to the outer circumferential side of the second folding ring; the first vibrating system further comprises a elastic support assembly arranged in space with the first folding ring, one end of the elastic support assembly is fixed to the yoke, and the other end of the elastic support assembly is fixed to the third segment.

[0017] Compared with the related art, in the circuit of the present application, the first sound signal input end with high and low sounds is connected to the positive input end of the power amplifier, and then the power amplifier divides the signal into two signals with high and low sounds, the low sound signal is directly input to the low frequency sound emitting module for sound emission, and the high sound signal is input to the high frequency sound emitting module for sound emission after being connected with the capacitor in series. The structure makes the low frequency sound emitting module emit low sound and the high frequency sound emitting module emit high sound. In the circuit of the present application, the voice signal is input to the second input end of the high frequency sound emitting module through the second sound signal input end. When the high frequency sound emitting module of the present application is used as a receiver, the low frequency sound emitting module can be used as an anti-phase sound elimination device. Meanwhile, the circuit of the present application only needs one power amplifier to realize multiple application functions, so that the structure is simple and widely applied. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0019] Figure 1 This is a structural block diagram of a circuit based on related technologies in one application scenario on a terminal device.

[0020] Figure 2 This is a structural block diagram of another application scenario of the circuitry related to this technology on a terminal device.

[0021] Figure 3 This is a schematic diagram of the circuit structure of the present invention.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the sound-generating device of the present invention;

[0023] Figure 5 This is a partially exploded three-dimensional structural diagram of the sound-generating device of the present invention;

[0024] Figure 6 This is a partial three-dimensional exploded view of the sound-generating device of the present invention from another angle.

[0025] Figure 7 For along Figure 4 Cross-sectional view of line AA in the middle;

[0026] Figure 8 for Figure 7 Enlarged view of part B in the middle;

[0027] Figure 9 This is a schematic diagram of the three-dimensional assembly of the main magnet, auxiliary magnet group and the first voice coil of the sound-generating device of the present invention;

[0028] Figure 10 This is a schematic diagram of the three-dimensional assembly of the magnetic yoke, the main pole core protrusion, and the second voice coil of the sound-generating device of the present invention.

[0029] Figure 11 This is a three-dimensional structural diagram of the main magnet assembly of the sound-generating device of the present invention.

Detailed Implementation Methods

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The present invention provides a circuit 200 and a sound-generating device 100, wherein the circuit 200 is applied to the sound-generating device 100.

[0032] The circuit 200 comprises a first sound signal input IN1, a second sound signal input IN2, a power amplifier 201, a capacitor 202, a low frequency sound emitting module 101 and a high frequency sound emitting module 102.

[0033] The first sound signal input IN1 is used for receiving a sound signal with high and low pitch, for example, a music signal.

[0034] The second sound signal input IN2 is used for receiving a voice signal.

[0035] The low frequency sound emitting module 101 is used for emitting low frequency sound.

[0036] The high frequency sound emitting module 102 is used for emitting high frequency sound and can be used as a receiver.

[0037] Please refer to Figure 3 , Figure 3 The circuit structure diagram of the circuit 200 of the present application is shown in Fig. 1.

[0038] The first sound signal input IN1 is connected to the positive input of the power amplifier 201. The negative input of the power amplifier 201 is connected to the ground. The output of the power amplifier 201 is connected to the input of the low frequency sound emitting module 101 and the first terminal of the capacitor 202 respectively. The second terminal of the capacitor 202 is connected to the first input of the high frequency sound emitting module 102. The second sound signal input IN2 is connected to the second input of the high frequency sound emitting module 102.

[0039] The working principle of the circuit 200 is as follows:

[0040] The first sound signal input IN1 divides the music signal with high and low pitch into two signals after passing through the power amplifier 201. One of the signals is directly sent to the input of the low frequency sound emitting module 101 for emitting low frequency sound by the low frequency sound emitting module 101. The other signal is sent to the first input of the high frequency sound emitting module 102 after passing through the capacitor 202 for emitting high frequency sound by the high frequency sound emitting module 102. In addition, the second sound signal input IN2 directly sends the voice signal to the second input of the high frequency sound emitting module 102. When the high frequency sound emitting module 102 is used as a receiver, the low frequency sound emitting module 101 can be used as an anti-phase sound eliminating device. Therefore, the circuit 200 of the present application only needs one power amplifier to realize multiple application functions, so that the structure is simple and the application is wide.

[0041] The application further provides the sound emitting device 100 applying the circuit 200.

[0042] The first vibration system 20 and the second vibration system 30 are coaxially arranged and located at opposite sides of the magnetic circuit system 40. This structure makes the second vibration system 30 arranged at the opposite side of the first vibration system 20 to emit sound, and makes the first vibration system 20 and the second vibration system 30 realize coaxial full-band sound emission, so that the sound effect of the circuit 200 is good.

[0043] Meanwhile, the second vibration system 30 can also be used as a microphone function sound emitting device. Specifically, the second vibration system 30 and the magnetic circuit system 40 cooperate to serve as a microphone, so that the first vibration system 10 and the magnetic circuit system 40 form a loudspeaker which can be used as an anti-phase sound elimination device.

[0044] In the embodiment, the first vibration system 20 and the magnetic circuit system 40 form the low-frequency sound emitting module 101, and the second vibration system 30 and the magnetic circuit system 40 form the high-frequency sound emitting module 102.

[0045] In the embodiment, the circuit connection relationship of the circuit 200 applying the sound emitting device 100 is as follows:

[0046] The first sound signal input end IN1 is connected to the positive input end of the power amplifier 201, and the negative input end of the power amplifier 201 is connected to the ground.

[0047] The output end of the power amplifier 201 is respectively connected to the first input end of the sound emitting device 100 and the first end of the capacitor 202.

[0048] The second end of the capacitor 202 is connected to the second input end of the sound emitting device 100.

[0049] The second sound signal input end S2 is connected to the third input end of the sound emitting device 100.

[0050] The first input end of the sound emitting device 100 is connected to the first vibration system 20, and the second input end of the sound emitting device 100 and the third input end of the sound emitting device 100 are both connected to the second vibration system 30.

[0051] In the embodiment, the working principle of the circuit 200 applying the sound emitting device 100 is as follows:

[0052] The first sound signal input end IN1 divides the music signal with high and low sound into two signals after passing through the power amplifier 201, one of which is directly sent to the low-frequency loudspeaker formed by the magnetic circuit system 40 in the sound generating device 100 and the second vibration system 20, and the other is sent to the high-frequency loudspeaker formed by the magnetic circuit system 40 in the sound generating device 100 and the second vibration system 30 after passing through the series capacitor 202. In addition, the second sound signal input end IN2 directly sends the voice signal to the high-frequency loudspeaker formed by the magnetic circuit system 40 in the sound generating device 100 and the second vibration system 30. When the second vibration system 30 and the magnetic circuit system 40 of the sound generating device are applied to form a loudspeaker as a receiver, the first vibration system 20 and the magnetic circuit system 40 form a loudspeaker as an anti-phase silencing device. Therefore, the circuit 200 of the present application can realize various application functions with only one power amplifier, so that the structure is simple and widely applied.

[0053] In this embodiment, please refer to Figures 4-11 As shown in the figure, the sound generating device 100 includes the yoke 10, the first vibration system 20, the second vibration system 30, the magnetic circuit system 40 and the front cover 50 fixed on the yoke 10 respectively.

[0054] The yoke 1 is annular.

[0055] The first vibration system 20 includes the first diaphragm 1 fixed on the yoke 10, the first voice coil 201 fixed on the first diaphragm 1, the first skeleton 2 in annular shape and the elastic support assembly 202. The first voice coil 201 is fixed on the first skeleton 2 close to one side of the magnetic circuit system 40.

[0056] The second vibration system 30 is arranged at a side of the magnetic circuit system 40 away from the first vibration system 20. The second vibration system 30 includes the second diaphragm 3 fixedly supported on the magnetic circuit system 40, the second voice coil 301 driving the second diaphragm 3 to vibrate and sound, and the second skeleton 4.

[0057] The magnetic circuit system 40 includes the yoke 5, the main magnetic steel group 6 fixed on one side of the yoke 5 close to the first diaphragm 1, and the auxiliary magnetic steel group 7 surrounding the main magnetic steel group 6.

[0058] The yoke 5 is annular. The second diaphragm 3 is arranged at a side of the yoke 5.

[0059] The main magnetic steel group 6 includes the main magnetic steel 61 in annular shape and the main pole core 62 fixed on one side of the main magnetic steel 61 away from the yoke 5. The inner wall of the main magnetic steel 61 and the inner wall of the yoke 5 jointly form the inner cavity 402.

[0060] The magnetic circuit system 40 comprises a first magnetic gap 401 and a second magnetic gap 403, and the first magnetic gap 401 is arranged around the second magnetic gap 403. In this embodiment, the second magnetic gap 403 is arranged on the side of the magnetic circuit system 40 away from the first vibration system 20. Specifically, the main pole core 62 comprises a main pole core body 621 fixed to the main magnetic steel 61 and a main pole core protruding portion 622 bent and extended from the inner periphery of the main pole core body 621 into the inner cavity 402. The main magnetic steel 61 and the magnetic yoke 5 jointly surround the main pole core protruding portion 622 and jointly form the second magnetic gap 403 with the main pole core protruding portion 622, and the second magnetic gap 403 is open to the second vibration system 30. The second voice coil 301 is inserted into the second magnetic gap 403 and drives the second diaphragm 3 to vibrate and produce sound, so that the second vibration system 30 and the magnetic circuit system 40 form a tweeter, the sound producing device 100 can provide a tweeter sound effect function, and can be used as a receiver, so that the circuit 200 has a simple structure and is widely used.

[0061] The first magnetic gap 401 is formed between the auxiliary magnetic steel group 7 and the main magnetic steel group 6. The first voice coil 201 is inserted into the first magnetic gap 401 and drives the first diaphragm 1 to vibrate and produce sound. This structure makes the first voice coil 201 of the first vibration system 20 inserted into the first magnetic gap 401 and drives the first diaphragm 1 to vibrate and produce low-frequency sound, so that the first vibration system 20 and the magnetic circuit system 40 form a woofer, the sound producing device 100 can provide a woofer sound effect function, so that the circuit 200 has good acoustic performance and is widely used.

[0062] The second diaphragm 3 and the first diaphragm 1 are arranged on opposite sides of the sound producing device 100, respectively. The second voice coil 301 and the first voice coil 201 are coaxially arranged. This structure makes the second vibration system 30 of the formed tweeter arranged on the opposite side of the formed woofer of the first vibration system 20, and makes the first vibration system 20 and the second vibration system 30 realize coaxial full-band sound production, so that the sound producing device 100 of the present application has good acoustic performance. When the second vibration system 30 and the magnetic circuit system 40 of the sound producing device 100 of the present application form a tweeter as a receiver, the woofer formed by the first vibration system 20 and the magnetic circuit system 40 can be used as an anti-phase sound elimination device, and the circuit 200 of the present application only needs one power amplifier to realize multiple application functions, so that the circuit 200 has a simple structure and is widely used.

[0063] In the embodiment, the main pole core 62 is provided with a through hole 620 which penetrates the main pole core body 621 and the main pole core protruding portion 622 in sequence. The main pole core 62 is hollow due to the through hole 620. The main pole core protruding portion 622 extends to the inner cavity 402 so that the through hole 620 communicates with the inner cavity 402 to form a large cavity which improves the high frequency performance of the sound generating device 100. This structure is conducive to improving the acoustic performance of the second vibration system 30 and the magnetic circuit system 40 to form a high frequency loudspeaker, and the acoustic performance when used as a receiver.

[0064] In the embodiment, the main magnetic steel group 6 is further provided with an auxiliary magnetic steel 63 which is arranged on the side of the main pole core body 621 away from the magnetic yoke 5. The auxiliary magnetic steel 63 closes the through hole 620, so as to improve the acoustic performance of the second vibration system 30 and the magnetic circuit system 40 to form a high frequency loudspeaker, and the acoustic performance when used as a receiver.

[0065] In the embodiment, the first diaphragm 1 is annular. The inner circumferential side of the first diaphragm 1 is fixed to the auxiliary magnetic steel 63. The outer circumferential side of the first diaphragm 1 is fixed to the yoke 10. Specifically, the first diaphragm 1 comprises a first annular ring 11 and a second annular ring 12. The first annular ring 11 is arranged around the second annular ring 12 and is spaced from the first annular ring 11. The second annular ring 12 is arranged around the auxiliary magnetic steel 63. The inner circumferential side of the second annular ring 12 is fixed to the outer side of the auxiliary magnetic steel 63. The first skeleton 2 serves as the apex of the first diaphragm 1. The outer circumferential side of the first skeleton 2 is fixed to the inner circumferential side of the first annular ring 11, and the inner circumferential side of the first skeleton 2 is fixed to the outer circumferential side of the second annular ring 12. The outer circumferential side of the first annular ring 11 is fixed to the yoke 10. This structure makes the thickness of the sound generating device 100 of the application reuse the height of the magnetic circuit system 40. The first diaphragm 1 of the first vibration system 20 is arranged outside the auxiliary magnetic steel 63, which reduces the thickness occupied by the bass loudspeaker of the first vibration system 20 and the magnetic circuit system 40, and increases the size of the bass loudspeaker, thereby improving the acoustic performance of the sound generating device 100 in the bass aspect, so as to make the acoustic performance of the circuit 200 good and widely applied.

[0066] In the embodiment, the first skeleton 2 is fixed to the first voice coil 201 on the side close to the magnetic circuit system 40. Specifically, the first skeleton 2 comprises a first segment 21 in the shape of a ring, a second segment 22 bent and extended from the inner circumferential side of the first segment 21 to the first voice coil 201, and a third segment 23 bent and extended from the inner circumferential side of the first segment 21 to the direction of the magnetic yoke 5. The first voice coil 201 is fixed to the side of the second segment 22 close to the magnetic yoke 5. The side of the second segment 22 away from the magnetic yoke 5 is fixed to the outer circumferential side of the second folded ring 12. The structure of the first skeleton 2 is conducive to reducing the thickness of the sound generating device 100, while increasing the size of the bass speaker, thereby improving the acoustic performance of the sound generating device 100 in the bass aspect, so that the acoustic performance of the circuit 200 is good and widely applied.

[0067] In the embodiment, the first vibration system 20 further comprises an elastic support assembly 202 arranged in space with the first folded ring 11. One end of the elastic support assembly 202 is fixed to the yoke 10. The other end of the elastic support assembly 202 is fixed to the third segment 23. The elastic support assembly 202 is used to strengthen the vibration effect of the first diaphragm 1, improve the acoustic performance of the sound generating device 100, and balance the swing of the first vibration system 20, thereby improving the stability of the sound generating device 100, so that the acoustic performance of the sound generating device 100 is good and widely applied.

[0068] In the embodiment, the yoke 10 is in the shape of a rectangle. The elastic support assembly 202 comprises two. The two elastic support assemblies 202 are respectively located on the opposite sides of the short axis of the yoke 10. The two symmetrically distributed elastic support assemblies 202 provide more stable support for the first voice coil 201, and the vibration reliability is better.

[0069] In the embodiment, the sound generating device 100 further comprises a support frame 60 in the shape of a ring. The support frame 60 is fixed to the side of the magnetic yoke 5 away from the yoke 10. The periphery of the second diaphragm 3 is supported and fixed to the side of the support frame 60 away from the magnetic yoke 5.

[0070] The magnetic circuit system 40 and the second vibration system 30 jointly form a lower cavity 404. The lower cavity 404 is in communication with the second magnetic gap 403.

[0071] Specifically, the support frame 60 is provided with a leakage hole 600 penetrating therethrough. The lower cavity 404 is in communication with the outside through the leakage hole 600. The provision of the leakage hole 600 is conducive to balancing the air pressure of the lower cavity 404 with the outside, thereby improving the acoustic performance of the high-frequency speaker formed by the magnetic circuit system 40 and the second vibration system 30, and better converting for receiver use, so that the acoustic performance of the sound generating device 100 is good and widely applied.

[0072] In the embodiment, the second diaphragm 3 comprises a second diaphragm vibrating part 31 spaced from the magnetic yoke 5, a second diaphragm folded ring part 32 extended from the outer periphery of the second diaphragm vibrating part 31, and a second diaphragm connecting part 33 extended from the second diaphragm folded ring part 32 to the support frame 60. The second diaphragm connecting part 33 is fixed to the support frame 60.

[0073] The second skeleton 4 is fixed to the second voice coil 301 on the side close to the magnetic circuit system 40. The second skeleton 4 is fixed to the second diaphragm vibrating part 31 on the side away from the magnetic circuit system 40. Specifically, the second skeleton 4 comprises a first fixed part 41 in the form of a ring, a spring arm 42 extended from the inner side of the first fixed part 41, and a second fixed part 43 extended from the spring arm 42 away from the first fixed part 41.

[0074] The second diaphragm connecting part 33 and the support frame 60 are respectively fixed to the opposite sides of the first fixed part 41. The second diaphragm vibrating part 31 and the second voice coil 301 are respectively fixed to the opposite sides of the second fixed part 43. The structure of the second skeleton 4 fixes the second diaphragm 3 to the support frame 60 and the second voice coil 301 respectively, and facilitates the elasticity of the spring arm 42 of the second skeleton 4, thereby enhancing the vibration effect of the second diaphragm vibrating part 31 and improving the reliability of the second diaphragm vibrating part 31, thus improving the stability and acoustic performance of the sound generating device 100, so that the acoustic performance of the circuit 200 is good and widely applied.

[0075] In the embodiment, the auxiliary magnetic steel group 7 comprises an auxiliary magnetic steel 71 fixed to the magnetic yoke 5 and an auxiliary pole core 72 fixed to the side of the auxiliary magnetic steel 71 away from the magnetic yoke 5.

[0076] The second skeleton 4 further comprises a third fixed part 44 extended from the outer side of the first fixed part 41 to the direction of the yoke 10.

[0077] The auxiliary pole core 72 is fixed to the yoke 10. The third fixed part 44 is fixed to the side of the auxiliary pole core 72 away from the yoke 10. Since the yoke 10 is in the form of a rectangle, the auxiliary pole core 72 comprises two. The two auxiliary pole cores 72 are respectively located on the opposite sides of the long axis of the yoke 10. This structure facilitates the fixation of the second diaphragm 3 to the yoke 10, thereby improving the stability and acoustic performance of the sound generating device 100.

[0078] The front cover 50 covers and is fixed to the second diaphragm 3 and cooperates with the second diaphragm 3 to form a front sound cavity 51. The front cover 50 is provided with a front sound hole 52 penetrating through the front cover 50. The front sound cavity 51 is in communication with the outside through the front sound hole 52. The structure of the front sound cavity 51 is beneficial to improve the effect of the second diaphragm 3 emitting high-frequency sound. The front cover 50 protects the second diaphragm 3 from external damage and is beneficial to be used as a receiver, thereby improving the stability and acoustic performance of the sound emitting device 100, so that the acoustic performance of the circuit 200 is good and widely applied.

[0079] Compared with the related art, in the circuit of the present application, the first sound signal input end with high and low sound is connected to the positive input end of the power amplifier, and then the power amplifier is divided into two signals with high and low sound. The low sound signal is directly input to the low-frequency sound emitting module for sound emission, and the high sound signal is input to the high-frequency sound emitting module for sound emission after being connected in series with the capacitor. This structure makes the low-frequency sound emitting module emit low sound and the high-frequency sound emitting module emit high sound. In the circuit of the present application, the voice signal is input to the second input end of the high-frequency sound emitting module through the second sound signal input end. When the high-frequency sound emitting module of the present application is used as a receiver, the low-frequency sound emitting module can be used as an anti-phase sound eliminating device. At the same time, the circuit of the present application only needs one power amplifier to realize multiple application functions, so that the structure is simple and widely applied.

[0080] The above is only an embodiment of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the inventive concept, but these are within the protection scope of the present application.

Claims

1. A circuit applied to a sound generating device, characterized by, The circuit comprises a first sound signal input end, a second sound signal input end, a power amplifier, a capacitor, a low-frequency sound emitting module and a high-frequency sound emitting module, the first sound signal input end is used for receiving a sound signal with high and low sounds, and the second sound signal input end is used for receiving a voice signal; the first sound signal input end is connected to a positive input end of the power amplifier; a negative input end of the power amplifier is connected to the ground; output ends of the power amplifier are respectively connected to an input end of the low-frequency sound emitting module and a first end of the capacitor; a second end of the capacitor is connected to a first input end of the high-frequency sound emitting module; and the second sound signal input end is connected to a second input end of the high-frequency sound emitting module. The sound emitting device comprises a first vibration system for vibrating to emit low sounds and a second vibration system for vibrating to emit high sounds, and the second vibration system can also be used as a receiver function sound emitting device; The input end of the low-frequency sound emitting module is a first input end of the sound emitting device, the first input end of the high-frequency sound emitting module is a second input end of the sound emitting device, and the second input end of the high-frequency sound emitting module is a third input end of the sound emitting device; The first input end of the sound emitting device is connected to the first vibration system, and the second input end of the sound emitting device and the third input end of the sound emitting device are both connected to the second vibration system.

2. A sound generating device, which employs the circuit as claimed in claim 1, characterized in that, The sound emitting device further comprises a yoke and a magnetic circuit system fixed to the yoke, the first vibration system and the second vibration system are coaxially arranged and located on opposite sides of the magnetic circuit system; the first vibration system comprises a first diaphragm fixed to the yoke and a first voice coil fixed to the first diaphragm; the second vibration system comprises a second diaphragm fixedly supported on the magnetic circuit system and a second voice coil for driving the second diaphragm to vibrate and emit sound; the magnetic circuit system comprises a first magnetic gap and a second magnetic gap, the first magnetic gap is arranged around the second magnetic gap; the first voice coil is inserted into the first magnetic gap and drives the first diaphragm to vibrate and emit low sounds, and the second voice coil is inserted into the second magnetic gap and drives the second diaphragm to vibrate and emit high sounds.

3. The sound production device of claim 2, wherein, The magnetic circuit system comprises a magnetic yoke, a main magnetic steel group fixed on one side of the magnetic yoke close to the first diaphragm, and a vice magnetic steel group surrounding the main magnetic steel group, the vice magnetic steel group and the main magnetic steel group are spaced apart to form the first magnetic gap, and the magnetic yoke is annular; the main magnetic steel group comprises a main magnetic steel in the form of a ring, a main pole core fixed on one side of the main magnetic steel away from the magnetic yoke, and an auxiliary magnetic steel, the inner wall of the main magnetic steel and the inner wall of the magnetic yoke jointly form an inner cavity; the main pole core comprises a main pole core body fixed on the main magnetic steel and a main pole core protruding part extending to the inner cavity from the inner periphery of the main pole core body, and the auxiliary magnetic steel is fixed on one side of the main pole core body away from the magnetic yoke; the main magnetic steel and the magnetic yoke jointly surround the main pole core protruding part and jointly form the second magnetic gap with the main pole core protruding part, and the second magnetic gap is open to the second vibration system; the main pole core protruding part is in the form of a hollow ring.

4. The sound production device of claim 3, wherein, The sound generating device further comprises a support frame in the form of a ring, the support frame is fixed on one side of the magnetic yoke away from the basin frame, and the periphery of the second diaphragm is supported and fixed on one side of the support frame away from the magnetic yoke; the magnetic circuit system and the second vibration system jointly form a lower cavity, and the lower cavity is in communication with the second magnetic gap.

5. The sound production device of claim 4, wherein, The second diaphragm comprises a second diaphragm vibration part spaced apart from the magnetic yoke, a second diaphragm folded ring part bent and extended from the outer periphery of the second diaphragm vibration part, and a second diaphragm connecting part bent and extended from the second diaphragm folded ring part to the support frame; the second diaphragm connecting part is fixed on the support frame; the second vibration system further comprises a second skeleton, one side of the second skeleton close to the magnetic circuit system is fixed on the second voice coil, and the other side of the second skeleton away from the magnetic circuit system is fixed on the second diaphragm vibration part.

6. The sound production device of claim 5, wherein, The second skeleton comprises a first fixed part in the form of a ring, a spring arm bent and extended from the inner side of the first fixed part, and a second fixed part extended from the spring arm away from the first fixed part, the second diaphragm connecting part and the support frame are respectively fixed on opposite sides of the first fixed part, and the second diaphragm vibration part and the second voice coil are respectively fixed on opposite sides of the second fixed part; the vice magnetic steel group comprises a vice magnetic steel fixed on the magnetic yoke and a vice pole core fixed on one side of the vice magnetic steel away from the magnetic yoke; the second skeleton further comprises a third fixed part bent and extended from the outer side of the first fixed part to the direction of the basin frame; the vice pole core is fixed on the basin frame, and the third fixed part is fixed on one side of the vice pole core away from the basin frame; the basin frame is in the form of a rectangle; the vice pole core comprises two, and the two vice pole cores are respectively located on opposite sides of the long axis of the basin frame.

7. The sound production device of claim 3, wherein, The first diaphragm is in the form of a ring, the inner periphery of the first diaphragm is fixed on the auxiliary magnetic steel, and the outer periphery of the first diaphragm is fixed on the basin frame.

8. The sound production device of claim 7, wherein, The first vibration system further comprises a first skeleton in a ring shape, and the first voice coil is fixed to one side of the first skeleton close to the magnetic circuit system; the first vibrating diaphragm comprises a first ring-shaped folding ring and a second ring-shaped folding ring, the first folding ring is arranged around the second folding ring and is spaced from the first folding ring, the second folding ring is arranged around the auxiliary magnetic steel, the inner circumferential side of the second folding ring is fixed to the outer side of the auxiliary magnetic steel, the first skeleton acts as a ball top of the first vibrating diaphragm, the outer circumferential side of the first skeleton is fixed to the inner circumferential side of the first folding ring, the inner circumferential side of the first skeleton is fixed to the outer circumferential side of the second folding ring, and the outer circumferential side of the first folding ring is fixed to the yoke.

9. The sound production device of claim 8, wherein, The first skeleton comprises a first segment in a ring shape, a second segment bent and extended from the inner circumferential side of the first segment to the first voice coil, and a third segment bent and extended from the inner circumferential side of the first segment to the direction of the magnetic yoke; the first voice coil is fixed to one side of the second segment close to the magnetic yoke, and the other side of the second segment away from the magnetic yoke is fixed to the outer circumferential side of the second folding ring; the first vibration system further comprises a resilient support assembly arranged in space with the first folding ring, one end of the resilient support assembly is fixed to the yoke, and the other end of the resilient support assembly is fixed to the third segment.

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