CN108111955B - Loudspeaking terminal equipment and loudspeaking power supply circuit - Google Patents
Loudspeaking terminal equipment and loudspeaking power supply circuit Download PDFInfo
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- CN108111955B CN108111955B CN201711434828.8A CN201711434828A CN108111955B CN 108111955 B CN108111955 B CN 108111955B CN 201711434828 A CN201711434828 A CN 201711434828A CN 108111955 B CN108111955 B CN 108111955B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
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Abstract
The embodiment of the application discloses loudspeaking terminal equipment and a loudspeaking power supply circuit, wherein the loudspeaking terminal equipment comprises a front shell, a rear shell, a vibrating diaphragm, a coil and a magnet; the front shell is a shell on one side of the terminal equipment, which is provided with a screen, the rear shell is a shell on the other side of the terminal equipment, which is buckled with the front shell, and the rear shell and the front shell are buckled to form a sealed cavity; a magnet is fixed on the front shell and used for providing a magnetic field environment; the rear shell is provided with a sound outlet, the vibrating diaphragm is arranged at the sound outlet, the sound outlet is used for transmitting sound emitted by the vibrating diaphragm, the coil is attached to one side, close to the magnet, of the vibrating diaphragm, and the coil is used for generating vibration in the magnetic field environment under the condition of electrification. Implement this application embodiment, can provide sufficient sound cavity volume and do not destroy vocal tone quality for the vibrating diaphragm.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a loudspeaking terminal device and a loudspeaking power supply circuit.
Background
Because the internal space of terminal equipment such as a mobile phone is limited, a micro speaker is generally used for sounding. The micro-speaker mainly includes a magnet providing a magnetic field environment, a coil attached under the diaphragm, a diaphragm, and a support portion (e.g., a bracket, magnetic steel, etc.). When the coil is electrified, the coil can cut the magnetic induction line to move and drive the vibrating diaphragm to vibrate, and therefore sound is produced. When the diaphragm vibrates, enough space needs to be arranged behind the diaphragm, and enough sound cavity volume is provided to enable the diaphragm to reach enough amplitude, so that larger sound is emitted. But the internal space is small for the micro-speaker.
At present, a sound outlet is generally formed in a supporting portion (such as a bracket, magnetic steel, etc.) of a micro-speaker to enlarge the volume of a sound cavity behind a diaphragm, so that the micro-speaker can emit relatively large sound.
However, this solution causes partial interference between the sound in front of the diaphragm and the sound coming out of the sound outlet, which results in a reduction in sound quality.
Disclosure of Invention
The embodiment of the application provides a but terminal equipment and power supply circuit that raises one's voice, this terminal equipment can provide sufficient sound cavity volume and do not destroy sound quality for the vibrating diaphragm.
The embodiment of the application provides a but terminal equipment of raising one's voice, includes: a front case, a rear case, a diaphragm, a coil and a magnet;
the front shell is a shell on one side of the terminal equipment, which is provided with a screen, the rear shell is a shell on the other side of the terminal equipment, which is buckled with the front shell, and the rear shell and the front shell are buckled to form a closed sound cavity;
a magnet is fixed on the front shell and used for providing a magnetic field environment;
the rear shell is provided with a sound outlet, the vibrating diaphragm is arranged at the sound outlet, the sound outlet is used for transmitting sound emitted by the vibrating diaphragm, the coil is attached to one side, close to the magnet, of the vibrating diaphragm, and the coil is used for generating vibration in the magnetic field environment under the condition of electrification.
The embodiment of the present application further provides a loudspeaking power supply circuit, including: the loudspeaker comprises a coil, a loudspeaker module and a power supply module;
the two output ends of the speaker module are respectively connected with two ends of the coil, and the speaker module is used for outputting an audio signal to the coil so as to enable the coil to generate motion in an external magnetic field environment;
the two input ends of the power supply module are respectively connected with the two ends of the coil, the coil is used for receiving electromagnetic waves emitted by the wireless power supply device and converting the electromagnetic waves into induced current, and the power supply circuit is used for converting the induced current into required direct current to supply power to equipment to be powered.
In this application embodiment, but above-mentioned terminal equipment that can raise one's voice does not use miniature speaker, but regards whole terminal equipment's shell as a closed sound chamber, sets up out the phonate hole on the shell, sets up vibrating diaphragm, coil and magnet correspondingly, and this coil can produce the vibration in the magnetic field environment that this magnet provided under the circumstances of circular telegram to the vibrating diaphragm vibration of drive attached to on the coil makes sound, and the above-mentioned phonate hole of rethread is with sound transmission away. This but terminal equipment that raises one's voice can provide sufficient sound cavity volume and not destroy sound quality for the vibrating diaphragm.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of a micro-speaker provided in the present application;
fig. 2A is a schematic structural diagram of a loudspeakable terminal device according to an embodiment of the present application;
fig. 2B is a schematic diagram of a sound hole position on a terminal device according to an embodiment of the present disclosure;
fig. 2C is a schematic diagram of a speaker circuit according to an embodiment of the present application;
fig. 3A is a schematic structural diagram of another loudspeakable terminal device according to an embodiment of the present application;
fig. 3B is a schematic diagram of a wireless charging technique provided herein;
fig. 3C is a schematic diagram of a charging circuit according to an embodiment of the present disclosure;
fig. 3D is a schematic diagram of a dc voltage conversion module according to an embodiment of the present disclosure;
fig. 3E is a schematic diagram of a dc voltage converting unit according to an embodiment of the present disclosure;
fig. 4A is a schematic diagram of a speaker power supply circuit according to an embodiment of the present application;
fig. 4B is a schematic diagram of another speaker power supply circuit provided in the embodiment of the present application;
fig. 4C is a schematic diagram of another speaker power supply circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are some, but not all embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive step based on the embodiments in the present application shall fall within the protection scope of the present application.
Because the internal space of terminal equipment such as a mobile phone is limited, a micro speaker is generally used for sounding. As shown in fig. 1, fig. 1 is a schematic structural diagram of a micro-speaker provided in the present application. As can be seen from the figure, a micro-speaker mainly includes a magnet providing a magnetic field environment, a coil attached under the diaphragm, a diaphragm, and a support portion (e.g., a bracket, magnetic steel, etc.). When the coil is electrified, the coil can cut the magnetic induction wire to generate vibration and drive the vibrating diaphragm attached to the magnetic induction wire to vibrate together, so that sound is produced. When the diaphragm vibrates, enough space needs to be arranged behind the diaphragm, and enough sound cavity volume is provided to enable the diaphragm to reach enough amplitude, so that larger sound is emitted. But the internal space is small for the micro-speaker. At present, a sound outlet is generally formed in a supporting portion (such as a bracket, magnetic steel, etc.) of a micro-speaker to enlarge the volume of a sound cavity behind a diaphragm, so that the micro-speaker can emit relatively large sound. However, this solution causes partial interference between the sound in front of the diaphragm and the sound coming out of the sound outlet, which results in a reduction in sound quality.
To solve the above problem, the embodiment of the present application provides a terminal device that can raise one's voice, and this terminal device can provide sufficient sound cavity volume and not destroy sound quality for the vibrating diaphragm. The details will be described below.
Referring to fig. 2A, fig. 2A is a schematic structural diagram of a loudspeakable terminal device according to an embodiment of the present application. As shown in fig. 2A, a speaker terminal device provided in an embodiment of the present application includes: a front case 201, a rear case 202, a diaphragm 203, a coil 204, and a magnet 205;
the front shell 201 is a shell on one side of the terminal device on which a screen is provided, the rear shell 202 is a shell on the other side of the terminal device fastened with the front shell 201, and the rear shell 202 is fastened with the front shell 201 to form a closed sound cavity 206;
a magnet 205 is fixed to the front case 201, and the magnet 205 is used for providing a magnetic field environment;
the back case 202 has a sound hole 207, the diaphragm 203 is disposed at the sound hole 207, the sound hole 207 is used for transmitting sound generated by the diaphragm 203, the coil 204 is attached to the side of the diaphragm 203 close to the magnet 205, and the coil 204 is used for generating vibration in the magnetic field environment when the power is applied.
In this embodiment, the rear case 202 and the front case 201 are fastened to form a closed sound cavity 206, and the closed sound cavity 206 is a closed cavity that can prevent the sound transmitted from the front side of the diaphragm 203 through the sound outlet (as shown in fig. 2B, the position of the sound outlet on the mobile phone terminal) from interfering with the sound emitted from the rear side of the diaphragm 203 (i.e., the sound in the closed cavity).
In this embodiment, the magnetic field direction of the magnetic field environment provided by the magnet 205 may pass through the coil 204, that is, when the coil 204 is energized, the coil 204 cuts the magnetic induction line to generate vibration and drive the diaphragm 203 attached thereto to vibrate together, thereby generating sound.
It can be understood that, in the embodiment of the present application, the loudspeakable terminal device 200 does not use a micro speaker, but uses the housing of the whole terminal device as a closed sound cavity, and sets a sound hole on the housing, and correspondingly sets a diaphragm, a coil and a magnet, where the coil can vibrate in a magnetic field environment provided by the magnet under the condition of power-on, so as to drive the diaphragm attached to the coil to vibrate to make a sound, and then transmit the sound through the sound hole. This but terminal equipment that raises one's voice can provide sufficient sound cavity volume and not destroy sound quality for the vibrating diaphragm.
As an alternative implementation, two ends of the coil are connected to a speaker circuit, as shown in fig. 2C, fig. 2C is a schematic diagram of a speaker circuit provided in an embodiment of the present application, where the speaker circuit includes: the audio signal processing device comprises a first switch unit, a second switch unit, an audio signal module and a control module; two ends x1 and x2 of the coil are respectively connected with one ends y1 and e1 of a first switch unit and a second switch unit, the other ends y2 and e2 of the first switch unit and the second switch unit, which are far away from the coil, are respectively connected with two output ends m1 and m2 of the audio signal module, and control ends y3 and e3 of the first switch unit and the second switch unit are respectively connected with a first output end c1 and a second output end c2 of the control module, and the control module is used for controlling the opening and closing of the first switch unit and the second switch unit.
In all embodiments of the present application, the switch unit may include one or more switch tubes, and the switch tubes may be metal-oxide-semiconductor (MOS) field effect transistors, Insulated Gate Bipolar Transistors (IGBTs), triodes, and other semiconductor switch tubes. Taking the MOS transistor as an example, one switching unit may include one MOS transistor or a plurality of MOS transistors connected in series, where the source and the drain of the MOS transistor are at two ends of the series connected plurality of MOS transistors, and the control end of the MOS transistor is the gate of the MOS transistor. When one switching unit includes a plurality of MOS transistors connected in series, the voltage distributed across both ends (source and drain) of each MOS transistor is reduced as compared with a case where one switching unit includes only one MOS transistor, so that the voltage stress of the switching unit can be further reduced. If the switching unit is an MOS transistor, the voltage stress of the switching unit can be understood as a voltage value between a drain electrode and a source electrode of the MOS transistor when the MOS transistor works. If the switching unit is a transistor or an IGBT, the voltage stress of the switching unit may be understood as a voltage value between a collector and an emitter of the transistor or the IGBT. Since the performance of the high withstand voltage switching unit is generally poor, the performance of the converter can be improved by using the low withstand voltage switching unit.
It can be understood that, when the control module controls the first switch unit and the second switch unit to be closed, the audio signals of the two output ends of the audio signal module are transmitted into the coil, and the coil can vibrate in the magnetic field environment provided by the magnet, so as to drive the diaphragm attached to the coil to vibrate to make sound, and then the sound is transmitted out through the sound outlet.
Referring to fig. 3A, fig. 3A is a schematic structural diagram of another loudspeakable terminal device according to an embodiment of the present application. As shown in fig. 3A, a loudspeakable terminal device provided in an embodiment of the present application includes: a front case 301, a rear case 302, a diaphragm 303, a coil 304, and a magnet 305;
the front shell 301 is a shell on one side of the terminal device on which a screen is disposed, the rear shell 302 is a shell on the other side of the terminal device fastened to the front shell 301, and the rear shell 302 is fastened to the front shell 301 to form a closed acoustic cavity 306; a magnet 305 is fixed on the front shell 301, and the magnet 305 is used for providing a magnetic field environment;
the rear housing 302 is provided with a sound outlet 307, the diaphragm 303 is disposed at the sound outlet 307, the sound outlet 307 is used for transmitting the sound generated by the diaphragm 303, the coil 304 is attached to the side of the diaphragm 303 close to the magnet 305, and the coil 304 is used for generating vibration in the magnetic field environment when being electrified;
the coil 304 is also used for receiving the electromagnetic wave emitted by the wireless power supply and converting the electromagnetic wave into an induced current; the two ends of the coil 304 are further connected to a power supply circuit, and the power supply circuit is configured to convert the induced current into a required direct current to supply power to the terminal device.
In this embodiment, the rear shell 302 and the front shell 301 are fastened together to form a closed acoustic cavity 306, where the closed acoustic cavity 306 is a closed cavity capable of preventing the sound transmitted through the sound outlet in front of the diaphragm 303 from interfering with the sound emitted from the back of the diaphragm 303 (i.e., the sound in the closed cavity).
In this embodiment, the magnetic field direction of the magnetic field environment provided by the magnet 305 may pass through the coil 304, that is, when the coil 304 is energized, the coil 304 cuts the magnetic induction line to generate vibration and drive the diaphragm 303 attached thereto to vibrate together, thereby generating sound.
In this embodiment, a wireless charging technology is also used (for example, as shown in fig. 3B, a power transmission coil of a charging stand generates a magnetic field after being powered on, a power reception coil in a mobile phone generates an induced current under the action of the magnetic field to light a bulb, that is, the power reception coil receives the charging of the power transmission coil), an electromagnetic wave is transmitted by a wireless power supply, then the coil 304 receives the electromagnetic wave and converts the electromagnetic wave into an induced current, and the induced current is converted into a required direct current to supply power to the terminal device after passing through a power supply circuit. The power supply circuit can convert the induced current into direct current and output required stable voltage.
It can be understood that, in the embodiment of the present application, the loudspeakable terminal device 300 does not use a micro speaker, but uses the housing of the whole terminal device as a closed sound cavity, and sets a sound hole on the housing, and correspondingly sets a diaphragm, a coil and a magnet, where the coil can vibrate in a magnetic field environment provided by the magnet under the condition of power-on, so as to drive the diaphragm attached to the coil to vibrate to make a sound, and then transmit the sound through the sound hole. Meanwhile, the coil can be used for realizing a wireless charging technology. This but terminal equipment of raising one's voice can provide sufficient sound cavity volume and do not destroy sound production tone quality for the vibrating diaphragm, and the existing coil of make full use of has reduced terminal equipment's cost in addition.
As an alternative implementation, two ends of the coil are connected to a speaker circuit, as shown in fig. 2C, fig. 2C is a schematic diagram of a speaker circuit provided in an embodiment of the present application, where the speaker circuit includes: the audio signal processing device comprises a first switch unit, a second switch unit, an audio signal module and a control module; two ends x1 and x2 of the coil are respectively connected with one ends y1 and e1 of a first switch unit and a second switch unit, the other ends y2 and e2 of the first switch unit and the second switch unit, which are far away from the coil, are respectively connected with two output ends m1 and m2 of the audio signal module, and control ends y3 and e3 of the first switch unit and the second switch unit are respectively connected with a first output end c1 and a second output end c2 of the control module, and the control module is used for controlling the opening and closing of the first switch unit and the second switch unit.
It can be understood that, when the control module controls the first switch unit and the second switch unit to be closed, the audio signals of the two output ends of the audio signal module are transmitted into the coil, and the coil can vibrate in the magnetic field environment provided by the magnet, so as to drive the diaphragm attached to the coil to vibrate to make sound, and then the sound is transmitted out through the sound outlet.
As an alternative implementation, the above power supply circuit may refer to fig. 3C, and fig. 3C is a schematic diagram of a charging circuit provided in an embodiment of the present application, where the power supply circuit includes: a rectifier bridge Z, a third switching unit Q3, a dc voltage conversion module and the above control module; two input ends Z1 and Z2 of the rectifier bridge Z are respectively connected to two ends x1 and x2 of the coil, the rectifier bridge Z is used for converting the alternating current generated by the coil into direct current, a positive output end Z3 and a ground output end Z4 of the rectifier bridge Z are respectively connected to two input ends p1 and p2 corresponding to the direct current voltage conversion module, the direct current voltage conversion module is used for converting the direct current into direct current with a voltage of a required output voltage, the circuit connecting the positive output end Z3 of the rectifier bridge Z and a corresponding end p1 of the direct current voltage conversion module is connected with the third switch unit Q3 in series, the control end s3 of the third switch unit Q3 is connected with the third output end c3 of the control module, and the control module is further used for controlling the opening and closing of the third switch unit Q3.
In this embodiment, the control module may be the same as the control module in fig. 2B, that is, the control module may control the opening and closing of the first switch unit, the second switch unit, and the third switch unit, respectively.
As an optional implementation, the dc voltage conversion module includes: the two input ends of the filtering unit are respectively connected with the two output ends of the rectifier bridge, and the two output ends of the filtering unit are respectively connected with the two input ends of the direct-current voltage conversion unit.
As an optional implementation manner, the filtering unit includes at least one filtering capacitor, the filtering capacitors are connected in parallel, and two common ends between the filtering capacitors are input ends of the filtering unit and are output ends of the filtering unit.
In this embodiment, as shown in fig. 3D, fig. 3D is a schematic diagram of a dc voltage conversion module provided in an embodiment of the present application, where the dc voltage conversion module includes: the rectifier bridge comprises a filter unit (the filter unit comprises two filter capacitors connected in parallel) and a direct-current voltage conversion unit, wherein two input ends of the filter unit are respectively connected with two output ends of the rectifier bridge, and two output ends of the filter unit are respectively connected with two input ends of the direct-current voltage conversion unit.
As an alternative implementation, the above-mentioned dc voltage converting unit may refer to fig. 3E, where fig. 3E is a schematic diagram of a dc voltage converting unit provided in an embodiment of the present application, and the dc voltage converting unit includes: the switch control chip, the diode, the inductor and the energy storage capacitor; the switch control chip comprises a first input end g1, a second input end g2, a switch end g3 and a feedback end g4, wherein the first input end g1 is connected with a positive output end of the filter unit, the second input end g2 is connected with a ground output end of the filter unit, the switch end g3 is connected with one end of the inductor, which is far away from the switch end, is connected with one end of the energy storage capacitor, which is far away from the inductor, is grounded, a common end of the switch end g3 and the inductor is connected with a negative electrode of the diode, a positive electrode of the diode is grounded, a common end of the inductor and the energy storage capacitor is a positive output end f of the direct current voltage conversion unit, the positive output end f is connected with the feedback end g4, and the feedback end g4 is used for feeding back the voltage of the positive output end f; the switch control chip controls the switch terminal g3 to be turned on or off according to the voltage of the positive output terminal f fed back by the feedback terminal g 4.
In this embodiment, a switch in the switch control chip is turned on, an input current charges an inductor and an energy storage capacitor connected in series, the switch in the switch control chip is turned off, the inductor and the energy storage capacitor release stored electric energy together, and the output terminal f is continuously supplied with power through the diode; the switch control chip is provided with a feedback terminal g4, and the switch control chip controls the on/off of the switch terminal g3 through the voltage of the positive output terminal f fed back by the feedback terminal g 4.
Referring to fig. 4A, fig. 4A is a schematic diagram of a speaker power supply circuit according to an embodiment of the present application, and as shown in fig. 4A, a speaker power supply circuit 400 according to an embodiment of the present application includes: the loudspeaker comprises a coil, a loudspeaker module and a power supply module; the two output ends of the speaker module are respectively connected with two ends of the coil, and the speaker module is used for outputting an audio signal to the coil so as to enable the coil to generate motion in an external magnetic field environment; the two input ends of the power supply module are respectively connected with the two ends of the coil, the coil is used for receiving electromagnetic waves emitted by the wireless power supply and converting the electromagnetic waves into induced current, and the power supply module is used for converting the induced current into required direct current to supply power to equipment to be powered.
In this embodiment, the two output ends of the speaker module transmit the audio signal into the coil, and the coil vibrates in the magnetic field environment provided by the external magnet, so as to drive the diaphragm attached to the coil to vibrate and make a sound.
In this embodiment, a wireless charging technology is also utilized, and an electromagnetic wave transmitted by an external wireless power supply is received by the coil and converted into an induced current, and after passing through the power supply module, the induced current is converted into a required direct current to supply power to the terminal device. The power supply module can convert the induced current into direct current and output required stable voltage.
It can be understood that, in this embodiment, the two ends of the coil are not only connected with the speaker module to serve as a circuit of the speaker, but also connected with the power supply module to serve as a circuit of the wireless charging, so that the effect of the coil is fully utilized, and the cost is reduced.
As an alternative implementation, referring to fig. 4B, fig. 4B is a schematic diagram of another speaker power supply circuit provided in an embodiment of the present application, where the speaker module includes: the audio signal processing device comprises a first switch unit, a second switch unit, an audio signal unit and a control unit; two ends of the coil are respectively connected with one ends of the first switch unit and the second switch unit, the other ends, far away from the coil, of the first switch unit and the second switch unit are respectively connected with two output ends of the audio signal unit, control ends e1 and e2 of the first switch unit and the second switch unit are respectively connected with a first output end c1 and a second output end c2 of the control unit, and the control unit is used for controlling the opening and closing of the first switch unit and the second switch unit.
As an alternative implementation, referring to fig. 4C, fig. 4C is a schematic diagram of another speaker power supply circuit provided in an embodiment of the present application, where the power supply module includes: the rectifier bridge, the third switching unit, the direct-current voltage conversion unit and the control unit; two input ends of rectifier bridge respectively with the both ends of coil are connected, the rectifier bridge is used for with the alternating current that the coil produced converts the direct current into, the positive output and the ground connection output of rectifier bridge respectively with two input ends that direct current voltage conversion unit corresponds are connected, direct current voltage conversion unit is used for with direct current converts the direct current into the direct current that the voltage is required output voltage, the positive output of rectifier bridge with establish ties on the circuit that direct current voltage conversion unit corresponds the end and connects the third switch unit, the control end e3 of third switch unit with the third output c3 of control unit is connected, control unit still is used for controlling the disconnection and the closure of third switch unit.
In this embodiment, when the first switch unit and the second switch unit controlled by the first output end and the second output end of the control unit are closed, the whole circuit is the speaker circuit, and a specific implementation manner is shown in fig. 2C, which is not described herein again; when the third switching unit controlled by the third output terminal of the control unit is closed, the whole circuit is the charging circuit, and the specific implementation manner is shown in fig. 3C, which is not described herein again.
The speaker terminal device and the speaker power supply circuit provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principles and implementations of the present application, and the description of the above embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.
Claims (7)
1. A loudspeakable terminal device, comprising: a front case, a rear case, a diaphragm, a coil and a magnet;
the front shell is a shell on one side of the terminal equipment, which is provided with a screen, the rear shell is a shell on the other side of the terminal equipment, which is buckled with the front shell, and the rear shell and the front shell are buckled to form a closed sound cavity;
a magnet is fixed on the front shell and used for providing a magnetic field environment;
the rear shell is provided with a sound outlet, the vibrating diaphragm is arranged at the sound outlet, the sound outlet is used for transmitting sound emitted by the vibrating diaphragm, the coil is attached to one side, close to the magnet, of the vibrating diaphragm, and the coil is used for generating vibration in the magnetic field environment under the condition of electrification;
the closed sound cavity is used for preventing the sound transmitted out through the sound outlet in front of the vibrating diaphragm from interfering with the sound emitted behind the vibrating diaphragm;
wherein, speaker circuit is connected at the both ends of coil, speaker circuit includes: the audio signal processing device comprises a first switch unit, a second switch unit, an audio signal module and a control module; two ends of the coil are respectively connected with one ends of the first switch unit and the second switch unit, the other ends, far away from the coil, of the first switch unit and the second switch unit are respectively connected with two output ends of the audio signal module, control ends of the first switch unit and the second switch unit are respectively connected with a first output end and a second output end of the control module, and the control module is used for controlling the first switch unit and the second switch unit to be opened and closed; when the control module controls the first switch unit and the second switch unit to be closed, audio signals of two output ends of the audio signal module are transmitted into the coil, so that the coil generates vibration in a magnetic field environment provided by the magnet, and the vibrating diaphragm attached to the coil is driven to vibrate to make sound;
the coil is also used for receiving electromagnetic waves transmitted by the wireless power supply and converting the electromagnetic waves into induced currents; and the two ends of the coil are also connected with a power supply circuit, and the power supply circuit is used for converting the induced current into required direct current to supply power for the terminal equipment.
2. The terminal device of claim 1, wherein the power supply circuit comprises: the rectifier bridge, the third switching unit, the direct-current voltage conversion module and the control module; two input ends of the rectifier bridge are respectively connected with two ends of the coil, the rectifier bridge is used for converting alternating current generated by the coil into direct current, a positive output end and a grounding output end of the rectifier bridge are respectively connected with two input ends corresponding to the direct current voltage conversion module, the direct current voltage conversion module is used for converting the direct current into direct current with voltage as required output voltage, the positive output end of the rectifier bridge is connected with a circuit connected with the corresponding end of the direct current voltage conversion module in series with the third switch unit, a control end of the third switch unit is connected with a third output end of the control module, and the control module is further used for controlling the third switch unit to be disconnected and closed.
3. The terminal device of claim 2, wherein the dc voltage conversion module comprises: the rectifier comprises a filtering unit and a direct-current voltage conversion unit, wherein two input ends of the filtering unit are respectively connected with two output ends of the rectifier bridge, and two output ends of the filtering unit are respectively connected with two input ends of the direct-current voltage conversion unit.
4. The terminal device according to claim 3, wherein the filter unit comprises at least one filter capacitor, the filter capacitors are connected in parallel, and two common terminals between the filter capacitors are input terminals and output terminals of the filter unit.
5. The terminal device according to claim 3, wherein the DC voltage conversion unit includes: the switch control chip, the diode, the inductor and the energy storage capacitor;
the switch control chip comprises a first input end, a second input end, a switch end and a feedback end, wherein the first input end is connected with the positive output end of the filter unit, the second input end is connected with the ground output end of the filter unit, the switch end is connected with one end of the inductor, which is far away from the switch end, is connected with one end of the energy storage capacitor, which is far away from the inductor, is grounded, the common end of the switch end and the inductor is connected with the negative electrode of the diode, the positive electrode of the diode is grounded, the common end of the inductor and the energy storage capacitor is the positive output end of the direct current voltage conversion unit, the positive output end is connected with the feedback end, and the feedback end is used for feeding back the voltage of the positive output end;
the switch control chip controls the on or off of the switch end through the voltage of the anode output end fed back by the feedback end.
6. A loudspeaker power supply circuit, comprising: the loudspeaker comprises a coil, a loudspeaker module and a power supply module;
two output ends of the loudspeaking module are respectively connected with two ends of the coil, and the loudspeaking module is used for outputting an audio signal to the coil so that the coil generates motion in an external magnetic field environment;
the two input ends of the power supply module are respectively connected with the two ends of the coil, the coil is used for receiving electromagnetic waves transmitted by the wireless power supply and converting the electromagnetic waves into induced current, and the power supply module is used for converting the induced current into required direct current to supply power to equipment to be powered;
wherein, the speaker module includes: the audio signal processing device comprises a first switch unit, a second switch unit, an audio signal unit and a control unit; two ends of the coil are respectively connected with one ends of the first switch unit and the second switch unit, the other ends, far away from the coil, of the first switch unit and the second switch unit are respectively connected with two output ends of the audio signal unit, control ends of the first switch unit and the second switch unit are respectively connected with a first output end and a second output end of the control unit, and the control unit is used for controlling the first switch unit and the second switch unit to be opened and closed; when the control unit controls the first switch unit and the second switch unit to be closed, audio signals of two output ends of the audio signal unit are transmitted into the coil;
the coil is included in the loudspeakable terminal device, and the loudspeakable terminal device further comprises a front shell, a rear shell, a vibrating diaphragm and a magnet; the front shell is a shell on one side of the terminal equipment, which is provided with a screen, the rear shell is a shell on the other side of the terminal equipment, which is buckled with the front shell, and the rear shell and the front shell are buckled to form a closed sound cavity; a magnet is fixed on the front shell and used for providing a magnetic field environment; the rear shell is provided with a sound outlet, the vibrating diaphragm is arranged at the sound outlet, the sound outlet is used for transmitting sound emitted by the vibrating diaphragm, the coil is attached to one side, close to the magnet, of the vibrating diaphragm, and the coil is used for generating vibration in the magnetic field environment under the condition of electrification; the closed sound cavity is used for preventing the sound transmitted out through the sound outlet in front of the vibrating diaphragm from interfering with the sound emitted behind the vibrating diaphragm;
the coil is also used for receiving electromagnetic waves transmitted by the wireless power supply and converting the electromagnetic waves into induced currents; and the two ends of the coil are also connected with a power supply circuit, and the power supply circuit is used for converting the induced current into required direct current to supply power for the terminal equipment.
7. The speakerphone supply circuit of claim 6, wherein the power supply module comprises: the rectifier bridge, the third switching unit, the direct-current voltage conversion unit and the control unit; two input ends of the rectifier bridge are respectively connected with two ends of the coil, the rectifier bridge is used for converting alternating current generated by the coil into direct current, a positive output end and a grounding output end of the rectifier bridge are respectively connected with two input ends corresponding to the direct current voltage conversion unit, the direct current voltage conversion unit is used for converting the direct current into direct current with voltage as required output voltage, the positive output end of the rectifier bridge is connected with a circuit connected with the corresponding end of the direct current voltage conversion unit in series with the third switch unit, a control end of the third switch unit is connected with a third output end of the control unit, and the control unit is further used for controlling the disconnection and the closing of the third switch unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434828.8A CN108111955B (en) | 2017-12-26 | 2017-12-26 | Loudspeaking terminal equipment and loudspeaking power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711434828.8A CN108111955B (en) | 2017-12-26 | 2017-12-26 | Loudspeaking terminal equipment and loudspeaking power supply circuit |
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| CN108111955A CN108111955A (en) | 2018-06-01 |
| CN108111955B true CN108111955B (en) | 2021-06-29 |
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| CN201711434828.8A Active CN108111955B (en) | 2017-12-26 | 2017-12-26 | Loudspeaking terminal equipment and loudspeaking power supply circuit |
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| CN110912369A (en) * | 2019-12-07 | 2020-03-24 | 歌尔股份有限公司 | Electronic product and electronic product assembly |
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| US7746673B2 (en) * | 2008-05-10 | 2010-06-29 | Active-Semi, Inc. | Flyback constant voltage converter having both a PWFM mode and a PWM mode |
| CN203120137U (en) * | 2013-01-18 | 2013-08-07 | 华为技术有限公司 | Mobile terminal |
| CN203326731U (en) * | 2013-05-15 | 2013-12-04 | 中兴通讯股份有限公司 | Coil device of mobile terminal |
| CN106464132A (en) * | 2014-03-28 | 2017-02-22 | 汤姆逊许可公司 | DC/DC converter and method of driving DC/DC converter |
| KR101561671B1 (en) * | 2015-07-21 | 2015-10-20 | (주)대만 | Bone-conduction acoustic apparatus |
| CN106229610A (en) * | 2016-07-21 | 2016-12-14 | 宇龙计算机通信科技(深圳)有限公司 | A kind of mobile terminal, near-field communication aerial and method to set up |
| CN106300695A (en) * | 2016-09-08 | 2017-01-04 | 上海展扬通信技术有限公司 | A kind of wireless charging method for mobile phone |
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