CN217428338U - Sound equipment - Google Patents

Abstract

The application discloses stereo set relates to stereo set technical field, has increased the route of charging of stereo set, and the reinforcing stereo set is the use duration under outdoor conditions. The sound equipment comprises a power supply circuit board and a main board. The power supply circuit board is configured to be electrically connected with a mains power supply network and convert power supplied by the mains power supply network into low-voltage direct current. The mainboard comprises an audio signal receiving module, a main chip, a power amplifier module, a first power distribution circuit and a second power distribution circuit. Wherein the first power distribution circuit is electrically connected with the power circuit board and the second power distribution circuit is configured to be electrically connected with the mobile power source.

Description

Sound equipment

Technical Field

The present disclosure relates to sound equipment technology, and particularly to a sound equipment.

Background

Sound refers to a device that is capable of recording, processing, transmitting, amplifying, and playing sound. The sound equipment can comprise a sound source (a music playing device, a pickup device, namely a microphone), a control device (an analog or digital sound console), an audio processor (peripheral devices such as an effector, an equalizer, a limiter, a frequency divider, a signal distributor, a delayer and the like are used in the past, and a digital system controller integrating the functions, a power amplifier (a power amplifier), a sound box and the like are also used at present.

The sound equipment includes portable sound equipment such as a pull rod sound equipment, a Bluetooth sound equipment and the like. The portable sound box can meet the requirement that a user uses the sound box outdoors or in a field scene. The portable sound equipment comprises a storage battery, and the storage battery can be charged and/or power-amplified when the mains network is connected to a power supply state, and also can be power-amplified when the storage battery is powered.

However, the battery capacity of the storage battery of the existing portable sound equipment is limited, and the storage battery can only be charged through a commercial power network, and when the portable sound equipment is used outdoors or outdoors for a long time, the storage battery may have insufficient electric quantity and cannot be connected with the power network for charging, so that the portable sound equipment cannot be used.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a sound box, which can increase the charging way of the sound box and enhance the use endurance of the sound box under outdoor conditions.

In order to achieve the purpose, the embodiment of the disclosure adopts the following technical scheme:

in one aspect, a sound box is provided. The sound equipment comprises a power supply circuit board and a main board. The power supply circuit board is configured to be electrically connected with a mains power supply network and convert power supplied by the mains power supply network into low-voltage direct current. The mainboard comprises an audio signal receiving module, a main chip, a power amplifier module, a first power distribution circuit and a second power distribution circuit. The first power distribution circuit is electrically connected with the power circuit board, and the second power distribution circuit is configured to be electrically connected with the mobile power supply.

According to the sound box provided by the embodiment of the disclosure, the main board can be electrically connected with a municipal power supply network through the power supply circuit board, and can also be directly electrically connected with a mobile power supply (such as an electronic cigarette lighter of an automobile) so as to increase the adaptability of the sound box to the power supply and enable the sound box to be better suitable for outdoor or suburban use scenes.

In some embodiments, the audio equipment further comprises a battery, and the battery is electrically connected with the main board. The mainboard still includes charging chip and first switch. The charging chip comprises an input end and an output end; the input end is electrically connected with the first distribution circuit and the second distribution circuit, and the output end is electrically connected with the storage battery. The charging chip is configured to convert the voltage provided by the first and second power distribution circuits into a charging voltage to charge the secondary battery. The first switch includes a first terminal, a second terminal, and a first control terminal. The first terminal is electrically connected with the power amplifier module, the second terminal is electrically connected with the storage battery, and the first control end is electrically connected with the input end; the first control terminal is configured to turn off the first switch in a case where the first power distribution circuit or the second power distribution circuit is electrically connected to the external power source.

In some embodiments, the motherboard further comprises a second switch and a trigger circuit. The second switch includes a third terminal, a fourth terminal, and a second control terminal. The third terminal is electrically connected with the first terminal and the first distribution circuit, and the fourth terminal is electrically connected with the power amplifier module. The trigger circuit is electrically connected with the input end and the second control end and is configured to conduct the second switch under the condition that the first distribution circuit or the second distribution circuit is electrically connected with an external power supply.

In some embodiments, the trigger circuit includes a first resistor, a first capacitor, a second resistor, and a third resistor. One end of the first resistor is electrically connected with the input end, and the other end of the first resistor is electrically connected with the first pole plate of the first capacitor. The first capacitor comprises a first polar plate and a second polar plate, the first polar plate is electrically connected with the other end of the first resistor, and the second polar plate is electrically connected with the second control end. One end of the second resistor is electrically connected with the first polar plate, and the other end of the second resistor is grounded. One end of the third resistor is electrically connected with the second pole plate, and the other end of the third resistor is grounded.

In some embodiments, the motherboard further comprises a power detection circuit and a control circuit. The power detection circuit is electrically connected with the first power distribution circuit, the second power distribution circuit and the main chip respectively, and is configured to detect the state of the first power distribution circuit and the second power distribution circuit electrically connected with the external power supply and transmit the state to the main chip. The control circuit is electrically connected with the main chip and the second switch. The main chip is configured to output a first control signal when detecting that the first power distribution circuit is electrically connected with the commercial power network, and output a second control signal when the second power distribution circuit is electrically connected with the mobile power supply. The control circuit is configured to control the second switch to be turned on under the control of the first control signal and to be turned off under the control of the second control signal. Wherein the priority of the control circuit is higher than the priority of the trigger circuit.

In some embodiments, the power detection circuit includes a fourth resistor, a first power detection circuit, and a second power detection circuit. One end of the fourth resistor is electrically connected with the first constant voltage end, and the other end of the fourth resistor is electrically connected with the first node. The first power detection circuit comprises a first triode, a fifth resistor, a sixth resistor and a seventh resistor. One end of the fifth resistor is electrically connected with the first node, and the other end of the fifth resistor is electrically connected with the emitting electrode of the first triode. The collector of the first triode is grounded, and the base is electrically connected with the second node. One end of the sixth resistor is electrically connected with the first distribution circuit, and the other end of the sixth resistor is electrically connected with the second node. One end of the seventh resistor is electrically connected with the second node, and the other end of the seventh resistor is grounded. The second power detection circuit comprises a second triode, an eighth resistor, a ninth resistor and a tenth resistor. One end of the eighth resistor is electrically connected with the first node, and the other end of the eighth resistor is electrically connected with the emitting electrode of the second triode. The collector of the second triode is grounded, and the base is electrically connected with the third node. One end of the ninth resistor is electrically connected with the second power distribution circuit, and the other end of the ninth resistor is electrically connected with the third node. One end of the tenth resistor is electrically connected with the third node, and the other end of the tenth resistor is grounded. The resistance values of the fifth resistor and the eighth resistor are different, and the first node is electrically connected with the main chip.

In some embodiments, the motherboard further comprises operating circuitry. The operating circuit is electrically connected with the second switch and the main chip; and the second switch is controlled to be switched on in response to user operation, or the second switch is controlled to be switched off in response to user operation through the main chip.

In some embodiments, the operation circuit includes a second capacitor, a zener diode, and an operation detection circuit. The second capacitor comprises a third plate and a fourth plate, the third plate is grounded, and the fourth plate changes the capacitance of the second capacitor in response to user operation. The voltage stabilizing diode comprises a first pin and two second pins; the first pins are electrically connected with the fourth electrode plate, and one of the second pins is electrically connected with the second control end. The operation detection circuit comprises a third triode, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a third capacitor. And the emitter of the third triode is electrically connected with the second constant voltage end, the base of the third triode is electrically connected with the fourth node, and the collector of the third triode is electrically connected with the fifth node. One end of the eleventh resistor is electrically connected to the second constant voltage terminal, and the other end is electrically connected to the fourth node. One end of the twelfth resistor is electrically connected with the fourth node, and the other end of the twelfth resistor is electrically connected with the other second pin of the voltage stabilizing diode. One end of the thirteenth resistor is electrically connected with the fifth node, and the other end of the thirteenth resistor is grounded. One plate of the third capacitor is grounded and the other plate is electrically connected to the fifth node. The fifth node is also electrically connected to the master chip.

In some embodiments, the motherboard further comprises a rectifier circuit. The rectifying circuit is electrically connected with the first power distribution circuit and the third terminal, and is configured to convert the voltage output by the first power distribution circuit into the rated voltage of the power amplifier module.

In some embodiments, the first switch is a P-MOS transistor switch, and/or the second switch is a P-MOS transistor switch.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic and are not intended to limit the actual size of products to which embodiments of the disclosure relate.

FIG. 1 is a block diagram of a sound of some embodiments of the present disclosure;

fig. 2 is a block diagram of a sound of some embodiments of the present disclosure;

FIG. 3 is a block diagram of an architecture of a motherboard according to some embodiments of the present disclosure;

FIG. 4 is another block diagram of a motherboard according to some embodiments of the present disclosure;

FIG. 5 is yet another block diagram of a motherboard according to some embodiments of the present disclosure;

FIG. 6 is yet another block diagram of a motherboard according to some embodiments of the present disclosure;

FIG. 7 is a circuit diagram of a trigger circuit and a control circuit of some embodiments of the present disclosure;

FIG. 8 is a circuit diagram of a power detection circuit of some embodiments of the present disclosure;

fig. 9 is a circuit diagram of an operating circuit of some embodiments of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Throughout the specification and claims, the term "comprising" is to be interpreted in an open, inclusive sense, i.e., as "including, but not limited to," unless the context requires otherwise. In the description herein, the terms "one embodiment," "some embodiments," "exemplary" or "such as" are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless otherwise specified.

In the description of the present disclosure, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

The use of "configured to" herein means open and inclusive language that does not exclude devices that are suitable or configured to perform additional tasks or steps.

The traditional sound equipment can be charged only through a commercial power network, and the charging path is single. Moreover, the sound equipment has a limited energy storage capacity (the amount of stored electric energy) of a storage battery, so that the sound equipment is not beneficial to being used outdoors or in the suburbs for a long time. Moreover, the method for increasing the cruising ability of the sound box by increasing the energy storage capacity of the storage battery has the advantages of higher cost on one hand, and possibility of increasing the weight of the sound box on the other hand, which is not favorable for carrying and carrying the sound box. In the present application, "outdoor or suburban" refers to a scene in which a sound device cannot be connected to a commercial power network for charging.

In order to solve the above technical problem, some embodiments of the present disclosure provide an audio equipment 100, and referring to fig. 1 and 2, the audio equipment 100 includes a power circuit board 110 and a main board 120.

The power circuit board 110 is configured to be electrically connected to a commercial power network (220V ac) and convert power supplied from the commercial power network into low voltage dc power. Illustratively, the power circuit board 110 may convert a 220V ac power supply of a mains power supply into a 22V dc power supply. For example, the power circuit board 110 includes at least a rectifier to convert the alternating current into the direct current.

The main board 120 is a control board of the audio device and may include a plurality of functional modules. Illustratively, the motherboard 120 may include an audio signal receiving module, a main chip 121, a power amplifier module 122, and a charging management system 200.

The audio signal receiving module can comprise a Bluetooth signal receiving device, an SD card reading device, a data transmission line interface or other data interfaces.

The main chip 121 is a central processing unit of the audio 100, and is used for processing and generating various electric signals.

The power amplifier module 122 refers to a power consumption (energy consumption) part of the audio system 100 during playing audio. Illustratively, the power amplifier module 122 may include one or more of a sound source (music player, pickup device, i.e. microphone), a controller (analog or digital sound console), an audio processor (previously, peripheral devices such as effector, equalizer, limiter, frequency divider, signal distributor, time delay device, etc., and now a digital system controller integrating the above functions), and a power amplifier (power amplifier).

The charging management system 200 is configured to be electrically connected to an external power source (a commercial power network or a mobile power source) and supply electric power to the stereo.

It is understood that the audio device 100 may further include other functional modules or devices, for example, the audio device 100 may further include a radio module, a display device, an indicator light, a loudspeaker, a storage module, a key operation module, a digital-to-analog converter, etc., and embodiments of the present disclosure are not further listed here.

In some embodiments, referring to fig. 3, the charge management system 200 includes a first power distribution circuit 10 and a second power distribution circuit 20.

The first power distribution circuit 10 includes a first electrical terminal 10A and a first power supply terminal 10B. The first electrical terminal 10A is configured to be electrically connected to a commercial power network (220V ac), that is, the first electrical terminal 10A is configured to be electrically connected to the power circuit board 110, so as to connect the low-voltage dc power processed by the power circuit board 110 to the first power distribution circuit 10. The first power supply terminal 10B is configured to supply a stable power supply voltage to the charging chip 30, the power amplifier module 122, and the like.

In some embodiments, the first power distribution circuit 10 may include one or more of a voltage regulation sub-circuit, a current regulation sub-circuit, and a filtering sub-circuit to provide a safe and stable power supply to the motherboard 200.

The second power distribution circuit 20 includes a second electrical terminal 20A and a second power supply terminal 20B. The second electrical terminal 20A is configured to be electrically connected with the mobile power source 300.

In the sound equipment 100 provided by the embodiment of the present disclosure, the main board 120 may be electrically connected to a commercial power network through the power circuit board 110, or may be directly electrically connected to a mobile power source (such as an electronic cigarette lighter of an automobile) through the second power distribution circuit 20, so that the adaptability of the sound equipment 100 to an external power source may be increased, and the sound equipment 100 may be better adapted to outdoor or suburban use scenes.

In some embodiments, the audio device 100 further comprises a storage battery 130, and the storage battery 130 is configured to store and release electric energy to supply electric energy to the audio device 100 (power amplification module 122) so that the audio device 100 can perform power amplification without connecting an external power supply. Thus, the sound system 100 can be used in outdoor, suburban, and other scenes. For example, a pull-rod sound used for dance in a square, and a sound used for advertisement playing when a business pushes a road.

It should be understood that in the case that the audio device 100 is connected to an external power source (such as 220V ac power of a mains power supply), the power amplifier module 122 may be powered by the external power source. In the case where the audio device 100 is not connected to an external power source, the power amplification module 122 may be powered by the storage battery 130.

In the embodiment of the present disclosure, the motherboard 120 is configured to provide a charging management system 200, and the charging management system 200 may be configured to further process the low-voltage dc power processed by the power circuit board 110, and then charge the storage battery 130; or controlling the storage battery 130 to supply power to the power amplifier module 122 (i.e. under the condition of not connecting an external power supply, the storage battery 130 supplies power to the power amplifier module 122 through the motherboard 200); or is electrically connected to another power source (portable power source 300), and charges battery 130 by processing a voltage supplied from the other power source.

Compared with the commercial power grid power supply, when the mobile power supply 300 supplies power to the outside, the released power is usually low-voltage direct current, so that an additional rectifier (alternating current is converted into direct current) is not required to be arranged between the mobile power supply 300 and the second power distribution circuit 20, the mobile power supply 300 and the second power distribution circuit 20 can be directly electrically connected, the electric energy stored by the mobile power supply 300 is input into the main board 200 through the second power distribution circuit 20, and the storage battery 130 is charged.

In some embodiments, the mobile power source 300 may include one or more of an on-board power source, a power bank, a battery, a charging post, and a charging station. For example, the mobile power source 300 may be a vehicle power source, such as an electronic cigarette lighter of an automobile, which can discharge 12V of dc voltage to the outside.

It will be appreciated that a second power distribution circuit 20 will typically only accommodate one mobile power source 300, or mobile power sources 300 that may provide the same power signal (same output voltage). Therefore, in the case where the mobile power supply 300 includes a plurality of mobile power supplies 300 different in output power supply signal, a plurality of second power distribution circuits 20 may be included. That is, the main board 200 may include a plurality of second power distribution circuits 20 to adapt to different mobile power sources 300. In the embodiment of the present disclosure, the motherboard 200 includes one second power distribution circuit 20 as an example.

The charging management system 200 further includes a charging chip 30, and the charging chip 30 may include an input terminal 30A and an output terminal 30B. The input terminal 30A is electrically connected to the first power supply terminal 10A and the second power supply terminal 20A, and the output terminal 30B is configured to be electrically connected to the secondary battery 130. The charging chip 30 is configured to convert the voltages supplied from the first power supply terminal 10A and the second power supply terminal 20A into a charging voltage (a rated voltage when the secondary battery 130 is charged) and output the charging voltage.

The main board 200 according to the embodiment of the present disclosure can charge the power supplied from the commercial power network into the storage battery 130 through the power circuit board 110, the first power distribution circuit 10, and the charging chip 30, and can charge the power supplied from the portable power source 300 into the storage battery 130 through the second power distribution circuit 20 and the charging chip 30. In this way, the audio equipment 100 can electrically connect the first electric connection terminal 10A of the first power distribution circuit 10 to the utility grid in a room or other situations where the utility grid can be connected, and charge the storage battery 130 through the utility grid. When the audio equipment 100 cannot access a commercial power network outdoors or in a suburb, the second power receiving terminal 20A of the second power distribution circuit 20 may be electrically connected to the portable power source 300 (e.g., an electronic cigarette lighter of an automobile), and the battery 130 may be charged by the portable power source 300. The charging path of the sound equipment 100 is increased, the charging adaptability of the sound equipment 100 is enhanced, and the sound equipment 100 is made to be better suitable for outdoor or suburban use scenes.

Referring to fig. 3, the first switch Q1 may include a first terminal S1, a second terminal D1, and a first control terminal G1. The first terminal S1 is electrically connected to the power amplifier module 122, the second terminal D1 is electrically connected to the battery 130, and the first control terminal G1 is electrically connected to the input terminal 30A of the charging chip 30. The first switch Q1 is configured to turn off the first switch Q1 when the first power supply terminal 10A or the second power supply terminal 20A supplies power. Therefore, in the process of charging the storage battery 130 by the motherboard 200 (the first power supply terminal 10B or the second power supply terminal 20B), the storage battery 130 does not supply power to the power amplifier module 122, which is beneficial to improving the charging efficiency of the storage battery 130, protecting the storage battery 130, and reducing the risk of overhigh temperature in the charging process of the storage battery 130.

For example, in some application scenarios, taking the mobile power source 300 as an electronic cigarette lighter as an example, during charging the storage battery 130 of the audio device 100 in a car, a user may not need or want to turn on the power amplification function of the audio device 100. For example, because the space in the car is small, the audio playback of the audio device 100 may be noisy and may affect the driving of the car. Alternatively, the output power of the mobile power supply 300 is usually small, and the charging efficiency of the storage battery 130 is low when audio playing is performed while charging.

For example, in the process of charging the storage battery 130 through the utility grid connected to the first power distribution circuit 10, the power amplifier module 122 may be powered through the first power supply terminal, instead of powering the power amplifier module 122 through the storage battery 130. To meet the user's need for uninterrupted use of audio 100 for long periods of time in some scenarios (see below).

Illustratively, other sub-circuits, such as a voltage regulator sub-circuit, a current regulator sub-circuit, a filter sub-circuit, etc., may also be included between the first terminal S1 and the power amplifier module 122. The embodiments of the present disclosure are not particularly limited in this regard. The second terminal D1 may also include other functional circuits such as a voltage regulator sub-circuit, a current regulator sub-circuit, and a filter sub-circuit electrically connected to the battery 130. The input terminal 30A of the charging chip 30 is electrically connected to the first voltage node DCIN, and therefore, the first control terminal G1 may also be electrically connected to the first voltage node DCIN.

In some embodiments, the first switch Q1 may be a P-MOS transistor switch. The two terminals (the first terminal S1 and the second terminal D1) of the P-MOS transistor switch are identical in structure, and the connection points of the two terminals when the two terminals are connected into a circuit can be interchanged. Taking the first switch Q1 as an example of a P-MOS transistor switch, the first control terminal G1 is a control terminal, and when the control terminal G1 is at a high level (voltage), the first terminal S1 and the second terminal D1 are insulated, i.e., the first switch Q1 is turned off; in the case where the control terminal G1 is at a low level, the first terminal S1 and the second terminal D1 are electrically connected, i.e., the first switch Q1 is turned on.

The first control terminal G1 is electrically connected to the input terminal 30A of the charging chip 30, i.e., the first control terminal G1 is electrically connected to the first power supply terminal 10B and the second power supply terminal 20B, or the first control terminal G1 is electrically connected to the first voltage node DCIN. When the first electrical terminal 10A of the first power distribution circuit 10 is electrically connected to the commercial power network, the first power supply terminal 10B outputs a high-level voltage signal, and at this time, the control terminal G1 of the first switch Q1 is at a high level, and the first switch Q1 is turned off. Similarly, when the second power connection segment 20A of the second power distribution circuit 20 is electrically connected to the mobile power source 300, the second power supply terminal 20B outputs a high-level voltage signal, and at this time, the control terminal G1 of the first switch Q1 is at a high level, and the first switch Q1 is turned off.

On the contrary, under the condition that the first power distribution circuit 10 and the second power distribution circuit 20 are not electrically connected to the external power source (the commercial power network or the mobile power source 300), the first power supply terminal 10B and the second power supply terminal 20B do not have a level signal, the control terminal G1 of the first switch Q1 may be a low level signal, the first switch Q1 is turned on, and at this time, whether the storage battery 130 and the power amplifier module 122 are turned on or not may be controlled by other circuits (such as the second switch Q2 hereinafter), so as to control whether the power amplifier module 122 operates or not.

In some embodiments, referring to fig. 4, the motherboard 200 further includes a second switch Q2 and the triggering circuit 40.

The second switch Q2 includes a third terminal S2, a fourth terminal D2, and a second control terminal G2. The third terminal S2 is electrically connected to the first terminal S1 and the first power supply terminal 10B, and the fourth terminal D2 is electrically connected to the power amplifier module 122.

The trigger circuit 40 is electrically connected to the input terminal 30A and the second control terminal G2 of the charging chip 30, and is configured to turn on the second switch Q2 when the first power supply terminal 10B or the second power supply terminal 20B supplies power.

Thus, under the condition that the first power supply terminal 10B supplies power (the first power connection terminal 10A is electrically connected to the mains network through the power circuit board 10), the first power supply terminal 10B also supplies power to the power amplifier module through the second switch Q2, so that the audio system 100 can play audio through the power supply provided by the mains network under the condition of being connected to the mains network, which is beneficial to improving the continuous working time of the audio system 100 under the condition of being connected to the mains network, so that the working time of the audio system 100 is not limited to the storage size of the storage battery 130, and the working condition adaptability of the audio system 100 is improved. For example, when the audio device 100 is used for broadcasting at the gate of a business, audio can be continuously played for a long time through a commercial power network.

It can be understood that, in the case of supplying power to the second power supply terminal 20B, although the second switch Q2 is turned on, the third terminal S2 of the second switch Q2 is not electrically connected to the second power supply terminal 10B, and the first switch Q1 remains in an off state, so that the power amplifier module 110 cannot be supplied with power, i.e., cannot perform audio playback. That is, audio playback is not possible while battery 130 of audio apparatus 100 is being charged by portable power source 300, and thus the charging speed of battery 130 in the state of power supply by portable power source 300 can be increased.

Under the condition that the first power distribution circuit 10 and the second power distribution circuit 20 are not electrically connected with the external power supply, the sound box 100 only provides electric energy through the storage battery 130, and if power needs to be supplied to the power amplification module 122 at the moment, the first switch Q1 and the second switch Q2 need to be turned on simultaneously.

In some embodiments, the second switch Q2 may also be a P-MOS transistor switch. The two terminals (the third terminal S2 and the fourth terminal D2) of the P-MOS transistor switch (the second switch Q2) are identical in structure, and the connection points of the two terminals when the two terminals are connected to the line can be interchanged. The second control terminal G2 is a control terminal, and when the second control terminal G2 is at a high level, the third terminal S2 and the fourth terminal D2 are insulated, i.e., the second switch Q2 is turned off; in case that the second control terminal G2 is at a low level, the third terminal S2 and the fourth terminal D2 are electrically connected, i.e., the second switch Q2 is turned on.

Thus, when the first power supply terminal 10B or the second power supply terminal 20B supplies power, the trigger circuit 40 inputs a low level signal to the second control terminal G2 of the second switch Q2 to turn on the second switch Q2.

In some embodiments, referring to fig. 7, fig. 7 is only a specific structural diagram of the trigger circuit 40 provided by the embodiments of the present disclosure. The trigger circuit 40 may include a first resistor R1, a first capacitor C1, a second resistor R2, and a third resistor R2.

One end of the first resistor R1 is electrically connected to the input terminal 30A (the first voltage node DCIN) of the charging chip 30, and the other end is electrically connected to the first plate of the first capacitor C1 (the right plate of the capacitor C1 in fig. 7). The first capacitor C1 also includes a second plate (the left plate of the capacitor C1 in fig. 7) that is configured to be electrically connected to the second control terminal G2 of the second switch Q2. One end of the second resistor R2 is electrically connected to the first plate, and the other end is grounded. One end of the third resistor R3 is electrically connected to the second plate of the first capacitor C1, and the other end is grounded.

Thus, in the case that the first power supply terminal 10B or the second power supply terminal 20B supplies power, the trigger circuit 40 converts the voltage signal of the first power supply terminal 10B or the second power supply terminal 20B into a pulse signal, and transmits the pulse signal to the second control terminal G2 of the second switch Q2 through the second plate 20.

It should be understood that, since the pulse signal outputted from the second plate is a high level signal, in the case that the second switch Q2 is a P-MOS transistor switch, the second control terminal G2 of the second switch Q2 needs to receive a low level signal when turned on. Therefore, in the case that the second switch Q2 is a P-MOS transistor switch, a signal conversion circuit 50 is further disposed between the second plate of the first capacitor C1 and the second control terminal G2, and the signal conversion circuit 50 is configured to convert the high-level pulse signal output by the trigger circuit 40 into a low-level signal and transmit the low-level signal to the second control terminal G2 of the second switch Q2.

Referring to fig. 7, fig. 7 only exemplarily shows a specific structure of the signal conversion circuit 50, and referring to fig. 7, the specific structure of the signal conversion circuit 50 is not repeated in the embodiment of the disclosure for the specific structure of the signal conversion circuit 50.

In some embodiments, referring to fig. 5, the motherboard 200 further includes power detection circuits 60, 121 and a control circuit 70.

Referring to fig. 5 and 8, the power detection circuit 60 is electrically connected to the first power terminal 10B, the second power terminal 20B and 121, and the power detection circuit 60 is configured to detect the power supply states of the first power terminal 10B and the second power terminal 20B and transmit the power to 121.

121 is configured to output a first control signal in case of detecting the supply of power by the first power supply terminal 10B and to output a second control signal in case of the supply of power by the second power supply terminal 20B.

The control circuit 70 is electrically connected to the switch 121 and a second switch Q2 (a second control terminal G2), and is configured to control the second switch Q2 to be turned on under the control of a first control signal and to control the second switch Q2 to be turned off under the control of a second control signal.

That is, in the case that the power supply 121 detects that power is currently supplied from the first power supply terminal 10B through the power supply detection circuit 60, the power supply 121 controls the second switch Q2 to be turned on through the control circuit 70. In the case where the power supply from the second power supply terminal 20B is detected by the power supply detection circuit 60 at 121, the second switch Q2 is controlled to be turned off by the control circuit 70 at 121. In this way, when the audio device 100 is connected to a commercial power network for charging, power can be automatically supplied to the power amplifier module 122 to automatically start the audio playing function.

Wherein the control circuit 70 has a higher priority than the flip-flop circuit 40. That is, when the flip-flop circuit 40 and the control circuit 70 output different signals to the second control terminal G2 of the second switch Q2, the second switch Q2 operates based on the signal input by the control circuit 70.

For example, in the case that the second switch Q2 is a P-MOS transistor switch and the second power supply terminal 20B supplies power, the trigger circuit 40 detects that the second power supply terminal 20B supplies power, and inputs a low-level signal to the second control terminal G2 of the second switch Q2 through the signal conversion circuit 50, wherein the low-level signal turns on the second switch Q2. Meanwhile, the power detection circuit 60 inputs a high level signal to the second control terminal G2 of the second switch Q2 through the switch 121 and the control circuit 70, and when the second control terminal G2 of the second switch Q2 receives a low level signal and a high level signal at the same time, the second control terminal G2 appears to be high, and the second switch Q2 is turned off.

In some embodiments, referring to fig. 8, the power detection circuit 60 includes a fourth resistor R4, a first power detection circuit 61, and a second power detection circuit 62.

One end of the fourth resistor R4 is electrically connected to the first constant voltage terminal V1, and the other end is electrically connected to the first node N1.

The first power detection circuit 61 includes a first transistor VT1, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7. One end of the fifth resistor R5 is electrically connected to the first node N1, and the other end is electrically connected to the emitter of the first transistor VT 1. The collector of the first transistor VT1 is grounded (electrically connected to the GED), and the base is electrically connected to the second node N2. One end of the sixth resistor R6 is electrically connected to the first power supply terminal 10B, and the other end is electrically connected to the second node N2. One end of the seventh resistor R7 is electrically connected to the second node N2, and the other end is grounded.

The second power detection circuit 62 includes a second transistor VT2, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10. One end of the eighth resistor R8 is electrically connected to the first node N1, and the other end is electrically connected to the emitter of the second transistor VT. The collector of the second transistor VT is grounded and the base is electrically connected to the third node N3. One end of the ninth resistor R9 is electrically connected to the second power supply terminal 20B, and the other end is electrically connected to the third node N3. One end of the tenth resistor R8 is electrically connected to the third node N3, and the other end is grounded.

The resistance values of the fifth resistor R5 and the eighth resistor R8 are different, and the first node N1 is electrically connected with the main chip. Thus, when the first power supply terminal 10B and the second power supply terminal 20B supply power, the voltage value of the first node N1 is different, and the voltage signal (DC DET) at the first node N1 can be detected by the voltage detector 121, so that the power supply terminal (the first power supply terminal 10B or the second power supply terminal 20B) is determined to be currently supplied with power, and an electrical signal corresponding to the current power supply terminal is generated, so as to output different control signals (the first control signal and the second control signal).

Illustratively, in case that it is detected that the power is currently supplied by the first power supply terminal 10B, the switch 121 may output a low level signal, so that the second switch Q2 is turned on under the control of the low level signal. In case it is detected that the current power is supplied by the second power supply terminal 20B, 121 may output a high level signal, such that the second switch Q2 is turned off under the control of the high level signal.

In some embodiments, referring to fig. 6, motherboard 200 also includes operational circuitry 80. The operation circuit 80 is electrically connected to the second switches Q2 and 121; the operation circuit 80 is configured to control the second switch Q2 to be turned on in response to a user operation (PWR-SW) or to control the second switch Q2 to be turned off through 121 in response to a user operation.

Thus, when the first power supply terminal 10B supplies power, the trigger circuit 40, the power detection circuit 60 and the control circuit 70 automatically supply power to the power amplification module 122, and the audio starts the power amplification function. If the user does not need to turn on the function, the user can operate the sound and turn off the second switch Q2 through the operation circuit. Alternatively, when power is not supplied to both the first power supply terminal 10B and the second power supply terminal 20B, that is, when power is supplied only from the battery 130, the sound device may be operated, and the second switch Q2 may be turned on or off by the operation circuit.

Illustratively, the sound device 100 includes an operation button, and when the user presses the operation button, the operation circuit 80 can sense the user operation and generate a corresponding electric signal to control the second switch Q2 to be turned on or off.

It is understood that in the case of supplying power only through the battery 130, the first switch Q1 may be always kept in a conducting state, or may be turned on and off synchronously with the second switch Q2 through an operating circuit, and the embodiment of the present disclosure is not particularly limited thereto.

In some embodiments, referring to fig. 9, the operation circuit 80 includes a second capacitor C2, a zener diode ZD, and an operation detection circuit 81.

The second capacitor C2 includes a third plate (the lower plate of the second capacitor C2 in fig. 9) and a fourth plate (the upper plate of the second capacitor C2 in fig. 9). The third plate is grounded and the fourth plate changes the capacitance of the second capacitor C2 in response to user operation. Illustratively, after the user presses the key, the fourth pad is grounded.

The zener diode ZD (consisting of two zener diodes connected in parallel) includes a first pin (a lower side pin of the zener diode ZD in fig. 9) and two second pins (an upper side pin of the zener diode ZD in fig. 9); the first pin is electrically connected to the fourth plate, one of the second pins (the second pin on the right side in fig. 9) is electrically connected to the second control terminal G2 of the second switch Q2, and the other second pin ZD2 (the second pin on the left side in fig. 9) is electrically connected to one end of the twelfth resistor R12.

In some embodiments, referring to fig. 9, the operation detection circuit 81 includes a third transistor VT3, an eleventh resistor R10, a twelfth resistor R12, a thirteenth resistor R13, and a third capacitor C3.

An emitter of the third transistor VT3 is electrically connected to the second constant voltage terminal V2, a base thereof is electrically connected to the fourth node N4, and a collector thereof is electrically connected to the fifth node N5. One end of the eleventh resistor R11 is electrically connected to the second constant voltage terminal V2, and the other end is electrically connected to the fourth node N4. One end of the twelfth resistor R10 is electrically connected to the fourth node N4, and the other end is electrically connected to the other second pin ZD2 of the zener diode ZD. One end of the thirteenth resistor R11 is electrically connected to the fifth node N5, and the other end is grounded. One plate of the third capacitor C3 is grounded, and the other plate is electrically connected to the fifth node N5.

In some embodiments, the first constant voltage terminal V1 and the second constant voltage terminal V2 may be the same. Illustratively, the first constant voltage terminal V1 and the second constant voltage terminal V2 are VCC-3V 3.

Referring to fig. 9, the fifth node N5 is also electrically connected to 121.

For example, referring to fig. 9, after the user performs an operation, the fourth plate of the second capacitor C2 is grounded, the potentials of the first pin and the second pin of the zener diode ZD are pulled down, the level of the second switch Q2 is pulled down, and the second switch Q2 is turned on. Meanwhile, the potential of the fourth node N4 changes, and the on/off state of the third transistor VT3 changes, so that the potential (KEY DET) of the fifth node N5 changes, and when the potential (KEY DET) of the fifth node N5 is detected by the 121, the 121 detects that the current operation of the user is a power-on signal or a light-engine signal, and when the current operation of the user is the power-on signal, the 121 outputs a low-level signal to the control terminal G2 of the second switch Q2 through the control circuit 70, and the second switch Q2 maintains the on state. In the case that the current operation of the user is the shutdown signal, 121 outputs a high level signal to the control terminal G2 of the second switch Q2 through the control circuit 70, and under the combined action of the high level signal and the low level signal, the second control terminal G2 of the second switch Q2 appears as a high level, and the second switch Q2 is turned off.

In some embodiments, referring to fig. 6, the motherboard further comprises a rectification circuit 90. The rectifying circuit 90 has one end electrically connected to the first power supply terminal 10 and the other end electrically connected to the third terminal S1 of the second switch Q2, and the rectifying circuit 90 is configured to convert the voltage of the first power supply terminal 10B into the rated voltage of the power amplifier module 122.

It should be understood that the rectifying circuit 90 may also have other functions, such as voltage stabilization, filtering, etc., and the embodiment of the disclosure is not limited thereto.

It should be understood that the main board 200 provided in the embodiments of the present disclosure may further include a plurality of resistors R, capacitors C, transistors, or other electronic components. Embodiments of the present disclosure are not listed here.

The main board 200 provided in the embodiment of the present disclosure can realize automatic switching and control through the cooperation of the trigger circuits 40 and 121 and the control circuit 70 under the condition that different power supplies (the storage battery 130, the commercial power network (the first power supply terminal 10B), and the mobile power supply 300 (the second power supply terminal 20B)) supply power, and the switching and management of the three power supplies are simple, which is beneficial to reducing the operation difficulty of a user.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims (10)

1. A sound box, comprising:

the power supply circuit board is configured to be electrically connected with a commercial power network and convert power supplied by the commercial power network into low-voltage direct current;

the mainboard comprises an audio signal receiving module, a main chip, a power amplifier module, a first power distribution circuit and a second power distribution circuit, wherein the first power distribution circuit is electrically connected with the power circuit board, and the second power distribution circuit is configured to be electrically connected with the mobile power supply.

2. The audio system of claim 1, further comprising a battery, the battery being electrically connected to the main board; the mainboard further comprises a charging chip and a first switch; wherein the content of the first and second substances,

the charging chip comprises an input end and an output end; the input end is electrically connected with the first distribution circuit and the second distribution circuit, and the output end is electrically connected with the storage battery; the charging chip is configured to convert the voltage provided by the first power distribution circuit and the second power distribution circuit into a charging voltage to charge the storage battery;

the first switch comprises a first terminal, a second terminal and a first control end; the first wiring terminal is electrically connected with the power amplifier module, the second wiring terminal is electrically connected with the storage battery, and the first control end is electrically connected with the charging chip; the first control terminal is configured to turn off the first switch if the first power distribution circuit or the second power distribution circuit is electrically connected to an external power source.

3. The sound of claim 2, wherein the main board further comprises:

the second switch comprises a third terminal, a fourth terminal and a second control end; the third terminal is electrically connected with the first terminal and the first distribution circuit, and the fourth terminal is electrically connected with the power amplifier module;

a trigger circuit electrically connected to the input terminal and the second control terminal and configured to turn on the second switch when the first power distribution circuit or the second power distribution circuit is electrically connected to an external power source.

4. The sound of claim 3, wherein the trigger circuit comprises:

one end of the first resistor is electrically connected with the input end;

the first capacitor comprises a first polar plate and a second polar plate, the first polar plate is electrically connected with the other end of the first resistor, and the second polar plate is electrically connected with the second control end;

one end of the second resistor is electrically connected with the first polar plate, and the other end of the second resistor is grounded;

and one end of the third resistor is electrically connected with the second pole plate, and the other end of the third resistor is grounded.

5. The sound of claim 3, wherein the main board further comprises:

a power detection circuit electrically connected to the first power distribution circuit, the second power distribution circuit, and the main chip, respectively, and configured to detect an electrical connection state of the first power distribution circuit and the second power distribution circuit to an external power source and transmit the detected electrical connection state to the main chip;

the control circuit is electrically connected with the main chip and the second switch;

the main chip is further configured to output a first control signal when the first power distribution circuit is detected to be electrically connected with a mains supply network, and output a second control signal when the second power distribution circuit is electrically connected with a mobile power supply; the control circuit is configured to control the second switch to be conducted under the control of the first control signal; under the control of the second control signal, controlling the second switch to be switched off; the priority of the control circuit is higher than that of the trigger circuit.

6. The audio device of claim 5, wherein the power detection circuit comprises:

one end of the fourth resistor is electrically connected with the first constant voltage end, and the other end of the fourth resistor is electrically connected with the first node;

the first power supply detection circuit comprises a first triode, a fifth resistor, a sixth resistor and a seventh resistor; one end of the fifth resistor is electrically connected with the first node, and the other end of the fifth resistor is electrically connected with an emitting electrode of the first triode; the collector of the first triode is grounded, and the base of the first triode is electrically connected with the second node; one end of the sixth resistor is electrically connected with the first distribution circuit, and the other end of the sixth resistor is electrically connected with the second node; one end of the seventh resistor is electrically connected with the second node, and the other end of the seventh resistor is grounded;

the second power supply detection circuit comprises a second triode, an eighth resistor, a ninth resistor and a tenth resistor; one end of the eighth resistor is electrically connected with the first node, and the other end of the eighth resistor is electrically connected with an emitting electrode of the second triode; the collector of the second triode is grounded, and the base is electrically connected with the third node; one end of the ninth resistor is electrically connected with the second power distribution circuit, and the other end of the ninth resistor is electrically connected with the third node; one end of the tenth resistor is electrically connected with the third node, and the other end of the tenth resistor is grounded;

the resistance values of the fifth resistor and the eighth resistor are different, and the first node is electrically connected with the main chip.

7. The sound box according to any one of claims 3-6, wherein the main board further comprises:

an operating circuit electrically connected with the second switch and the main chip; and the second switch is controlled to be switched on in response to user operation, or the second switch is controlled to be switched off by the main chip in response to user operation.

8. The sound of claim 7, wherein the operational circuitry comprises:

the second capacitor comprises a third plate and a fourth plate, the third plate is grounded, and the fourth plate responds to user operation to change the capacitance of the second capacitor;

the voltage stabilizing diode comprises a first pin and two second pins; the first pin is electrically connected with the fourth electrode plate, and one second pin is electrically connected with the second control end;

the operation detection circuit comprises a third triode, an eleventh resistor, a twelfth resistor, a thirteenth resistor and a third capacitor; an emitter of the third triode is electrically connected with the second constant voltage end, a base of the third triode is electrically connected with the fourth node, and a collector of the third triode is electrically connected with the fifth node; one end of the eleventh resistor is electrically connected with the second constant voltage terminal, and the other end of the eleventh resistor is electrically connected with the fourth node; one end of the twelfth resistor is electrically connected with the fourth node, and the other end of the twelfth resistor is electrically connected with the other second pin of the voltage stabilizing diode; one end of the thirteenth resistor is electrically connected with the fifth node, and the other end of the thirteenth resistor is grounded; one polar plate of the third capacitor is grounded, and the other polar plate is electrically connected with a fifth node;

the fifth node is also electrically connected with the main chip.

9. The sound of claim 3, wherein the main board further comprises:

and the rectifying circuit is electrically connected with the first power distribution circuit and the third terminal and is configured to convert the voltage output by the first power distribution circuit into the rated voltage of the power amplifier module.

10. The audio device according to claim 3, wherein the first switch is a P-MOS transistor switch and/or the second switch is a P-MOS transistor switch.

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