CN107886976B - Multifunctional combined record player and device thereof - Google Patents
Multifunctional combined record player and device thereof Download PDFInfo
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- CN107886976B CN107886976B CN201711431430.9A CN201711431430A CN107886976B CN 107886976 B CN107886976 B CN 107886976B CN 201711431430 A CN201711431430 A CN 201711431430A CN 107886976 B CN107886976 B CN 107886976B
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- 230000005236 sound signal Effects 0.000 claims abstract description 74
- 230000003321 amplification Effects 0.000 claims abstract description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 106
- 230000000087 stabilizing effect Effects 0.000 claims description 45
- 238000005192 partition Methods 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- SEWHDNLIHDBVDZ-UHFFFAOYSA-N 1,2,3-trichloro-4-(2-chlorophenyl)benzene Chemical compound ClC1=C(Cl)C(Cl)=CC=C1C1=CC=CC=C1Cl SEWHDNLIHDBVDZ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001422033 Thestylus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10018—Improvement or modification of read or write signals analog processing for digital recording or reproduction
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
Abstract
The invention discloses a multifunctional combined record player and a device thereof, comprising: the device comprises an electric singing machine core, an electric singing circuit, a magnetic tape audio circuit, an AM/FM radio circuit, a CD circuit, a Bluetooth circuit, a change-over switch circuit, a volume control circuit, a power amplification circuit, a loudspeaker, a power transformer and a rectifying circuit; the record player core is connected with the record circuit; the electric singing circuit, the magnetic tape audio circuit, the AM/FM radio circuit, the CD circuit and the Bluetooth circuit are respectively connected with the change-over switch circuit; the switching circuit is connected with the loudspeaker through the volume control circuit and the power amplification circuit in sequence; the power transformer is respectively connected with the change-over switch circuit and the power amplifying circuit through the rectifying circuit; the record player can play audio signals from black CD, magnetic tape, CD, bluetooth, radio and the like, and the functions bring great convenience to users.
Description
Technical Field
The invention relates to the technical field of record players, in particular to a multifunctional combined record player and a device thereof.
Background
The gramophone, also called a record player, is a sound reproducing device in which sound is stored in an arc-shaped notch cut in the plane of a record (disc) acoustically. The record is placed on the turntable and rotated under the stylus. The gramophone is one of the great inventions of edison, because the record can be reproduced in a large quantity more conveniently, and the playing time is longer than that of most cylindrical recording media.
The current record players on the market have various, but basically have no Bluetooth receiving function, and along with the development of intelligent mobile terminals, more and more people use the intelligent mobile phones, and because the intelligent mobile phones are small in size and convenient to carry and have a music playing function, more and more people like to store songs loved by themselves in the mobile phones, so that favorite songs of the users can be heard at any time and any place. However, the existing record player basically has no function of bluetooth reception, so that songs in each terminal such as a mobile phone cannot be played on the record player, which is inconvenient for users. The existing record player can only play a black tape record, can not play audio signals of CD, tape and AM/FM radio, that is, the existing record player has single function and has no function of playing audio signals of other forms or storage media, such as CD playing function, tape playing function, bluetooth playing function, radio function and the like, thereby bringing inconvenience to users. And the structure of the existing record player is not compact, the occupied space is large, and the cost is high.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a multifunctional combined record player and a device thereof, which aims to solve the problem of single function of the existing record player.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a multi-functional combination jukebox device, comprising:
an electric singing movement for reading audio signals of a record;
an electrical singing circuit for processing audio signals of a record;
a tape audio circuit for reading the tape audio signal;
an AM/FM radio circuit for receiving an AM/FM audio signal;
a CD circuit for reading the CD audio signal;
a bluetooth circuit for receiving bluetooth audio signals;
a switching circuit for switching the audio signal output;
a volume control circuit for adjusting the volume of the audio signal;
a power amplifying circuit for amplifying the audio signal;
a speaker for playing audio signals;
the power transformer is used for performing alternating current-direct current conversion;
a rectifying circuit for rectifying a direct current signal;
the record player core is connected with the record circuit; the electric singing circuit, the magnetic tape audio circuit, the AM/FM radio circuit, the CD circuit and the Bluetooth circuit are respectively connected with the change-over switch circuit; the switching circuit is connected with the loudspeaker through the volume control circuit and the power amplification circuit in sequence; the power transformer is respectively connected with the change-over switch circuit and the power amplifying circuit through the rectifying circuit.
The multifunctional combined record player device further comprises: an LED display screen; the LED display screen is connected with the change-over switch circuit.
The multifunctional combined record player device further comprises: a headset interface and an RCA output interface; the earphone interface is connected with the power amplifying circuit, and the RCA output interface is connected with the change-over switch circuit.
The multifunctional combination record player device, wherein the AM/FM radio circuit comprises: an AM bar antenna for receiving an AM signal;
an FM antenna for receiving FM signals;
the electrostatic protection module is used for carrying out electrostatic protection on the FM signal;
a radio module for converting an AM signal or an FM signal into a corresponding audio signal;
an audio output module for filtering the audio signal;
the selecting and tuning module is used for selecting AM or FM and tuning;
the radio power supply voltage stabilizing module is used for stabilizing the voltage of the power supply;
a clock module for providing a clock signal;
the LED indication module is used for carrying out signal indication;
the AM magnetic rod antenna is connected with the audio output module through the radio module; the FM antenna, the electrostatic protection module, the radio module and the audio output module are sequentially connected; the radio power supply voltage stabilizing module, the clock module and the LED indication module are respectively connected with the radio module; the radio module is also connected with a radio power supply voltage stabilizing module through a station adjusting module.
The multifunctional combined record player device, wherein the electrostatic protection module comprises: the first diode, the second diode, the first capacitor and the second capacitor; the anode of the first diode is respectively connected with the FM antenna, the cathode of the second diode and the radio module; the cathode of the first diode is connected with the radio module through a first capacitor and a second capacitor respectively; the cathode of the first diode is grounded; the anode of the second diode is connected with the cathode of the first diode;
the radio module includes: a radio chip; the AMINN pin and the AMINP pin of the radio chip are connected with an AM magnetic rod antenna; the RFINP pin of the radio chip is respectively connected with the FM antenna and the electrostatic protection module; the RFGNDE pin, the DVSS pin and the DVDD pin of the radio chip are all connected with the electrostatic protection module; the STIN pin of the radio chip is connected with a radio power supply voltage stabilizing module; the ST pin of the radio chip is connected with the LED indication module; the TUNINP pin, the VOL pin and the AM-FM pin of the radio chip are suspended; the RFVDD pin, the AVDD pin, the STALP pin, the XTALN pin and the AVSS pin of the radio chip are all connected with a clock module; the LOUT pin and the ROUT pin of the radio chip are connected with the audio output module; the SPAN pin and the CH pin of the radio chip are both connected with a selection tuning module; the model of the radio chip is KT0932.
The multifunctional combined record player device, wherein the audio output module comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor and an eighth capacitor; one end of the third capacitor is connected with the radio module and is grounded through a first resistor; the other end of the third capacitor is connected with the output end of the audio left channel through a third resistor and a seventh capacitor in sequence, and is grounded through a fifth capacitor; one end of the fourth capacitor is connected with the radio module and is grounded through a second resistor; the other end of the fourth capacitor is connected with the output end of the audio right channel through a fourth resistor and an eighth capacitor in sequence, and is grounded through a sixth capacitor;
the selective tuning module comprises: a fifth resistor, a sixth resistor, a seventh resistor, a first switch and a sliding resistor; the sliding end of the sliding resistor is connected with the radio module; the first fixed end of the sliding resistor is connected with the radio power supply voltage stabilizing module and is also connected with the radio module and the first switch respectively through a fifth resistor; the second fixed end of the sliding resistor is grounded; the first switch is grounded through a sixth resistor and a seventh resistor respectively.
The multifunctional combined record player device, wherein the radio power supply voltage stabilizing module comprises: eighth resistor, ninth resistor, eleventh resistor, twelfth resistor, second switch, ninth capacitor, tenth capacitor, eleventh capacitor, twelfth capacitor, voltage stabilizing chip, first inductor and second inductor; the VIN pin of the voltage stabilizing chip is connected with a power supply voltage end through an eighth resistor and is grounded through a ninth capacitor and a tenth capacitor respectively; the DGND pin of the voltage stabilizing chip is grounded; an OUT pin of the voltage stabilizing chip is grounded through an eleventh capacitor and a twelfth capacitor respectively; the OUT pin of the voltage stabilizing chip is connected with the radio module through a ninth resistor and a first inductor in sequence, and is connected with the selective tuning module through the ninth resistor and a second inductor in sequence; the ninth resistor is connected with a second switch through the first inductor and the twelfth resistor in sequence, and the second switch is connected with the radio module; the second switch is also grounded through an eleventh resistor;
the LED indication module comprises: a tenth resistor and a third diode; the anode of the third diode is connected with the radio module through a tenth resistor, and the cathode of the third diode is grounded;
the clock module includes: thirteenth, fourteenth, fifteenth, sixteenth and crystal oscillator; one end of the crystal oscillator is connected with the radio module and is grounded through a fifteenth capacitor; the other end of the crystal oscillator is connected with the radio module and is grounded through a sixteenth capacitor; one end of the thirteenth capacitor is respectively connected with the chip power supply end and the radio module, and the other end of the thirteenth capacitor is grounded; one end of the fourteenth capacitor is connected with the power supply end of the chip and the radio module respectively, and the other end of the fourteenth capacitor is grounded.
A multi-functional combination jukebox, comprising: the box body comprises a bottom plate and a top cover which are oppositely arranged, a first side wall, a second side wall, a third side wall and a fourth side wall are sequentially arranged between the bottom plate and the top cover in a surrounding mode, a plurality of openings are formed in the first side wall of the box body, a loudspeaker and a control panel for controlling the combined record player are arranged at the opening of the first side wall, and a CD playing device for playing a CD is further arranged at the opening of the first side wall; an opening is arranged on the second side wall of the box body, and a tape playing device for playing the tape is arranged at the opening of the second side wall; a middle partition plate is arranged in the box body, an opening is formed in the middle partition plate, and an electric singing machine core is arranged at the opening of the middle partition plate;
the control panel is internally provided with a PCB board, and the PCB board is provided with an electric singing circuit for processing an audio signal of an album, a magnetic tape audio circuit for reading the magnetic tape audio signal, an AM/FM radio circuit for receiving an AM/FM audio signal, a CD circuit for reading a CD audio signal, a Bluetooth circuit for receiving a Bluetooth audio signal, a change-over switch circuit for switching audio signal output, a volume control circuit for adjusting the volume of the audio signal, a power amplification circuit for amplifying the audio signal, a power transformer for performing AC/DC conversion and a rectification circuit for rectifying a DC signal;
the record player core is electrically connected with the record circuit; the CD playing device is electrically connected with a CD circuit; the tape playing device is electrically connected with a tape audio circuit; the electric singing circuit, the magnetic tape audio circuit, the AM/FM radio circuit, the CD circuit and the Bluetooth circuit are respectively connected with the change-over switch circuit; the switching circuit is electrically connected with the loudspeaker through the volume control circuit and the power amplification circuit in sequence; the power transformer is respectively connected with the change-over switch circuit and the power amplifying circuit through the rectifying circuit.
The multifunctional combined record player is characterized in that a plurality of sound guide holes are formed in the third side wall of the box body.
The multifunctional combined record player is characterized in that an LED display screen is arranged on the control panel and is electrically connected with a change-over switch circuit.
Compared with the prior art, the multifunctional combined record player and the device thereof provided by the invention can play audio signals from a black tape, a magnetic tape, a CD, bluetooth, a radio and the like by kneading various audio playing devices, thereby bringing great convenience to users.
Drawings
Fig. 1 is a schematic circuit diagram of a multifunctional combined record player device according to the present invention.
FIG. 2 is a block diagram of an AM/FM radio circuit according to a preferred embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of an AM/FM radio circuit according to an embodiment of the present invention.
Fig. 4 is an exploded view showing the construction of the multifunctional assembled record player according to the present invention.
Detailed Description
The invention provides a multifunctional combined record player and a device thereof. In order to make the objects, technical solutions and effects of the present invention clearer and more specific, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a multifunctional combined record player device according to the present invention, and as shown in fig. 1, the present invention provides a multifunctional combined record player device, including: a record player core 11 for reading audio signals of a record; an electrical singing circuit 12 for processing audio signals of a record; a tape audio circuit 13 for reading a tape audio signal; an AM/FM radio circuit 14 for receiving an AM/FM audio signal; a CD circuit 15 for reading the CD audio signal; a bluetooth circuit 16 for receiving bluetooth audio signals; a switching switch circuit 17 for switching the audio signal output; a volume control circuit 18 for adjusting the volume of the audio signal; a power amplification circuit 19 for amplifying the audio signal; a horn 20 for playing an audio signal; a power transformer 21 for performing ac/dc conversion; a rectifying circuit 22 for rectifying a direct current signal; the electric singing machine core 11 is connected with an electric singing circuit 12; the electric singing circuit 12, the magnetic tape audio circuit 13, the AM/FM radio circuit 14, the CD circuit 15 and the Bluetooth circuit 16 are respectively connected with the change-over switch circuit 17; the switching circuit 17 is connected with a loudspeaker 20 through a volume control circuit 18 and a power amplification circuit 19 in sequence; the power transformer 21 is connected to the switching circuit 17 and the power amplifying circuit 19 through the rectifying circuit 22, respectively.
Specifically, as shown in fig. 1, the invention integrates the electric singing, the magnetic tape, the radio, the CD and the bluetooth circuit, and selectively switches the electric singing circuit, so that the electric singing machine can play not only the record (namely the functions of the electric singing circuit and the electric singing machine core), but also the magnetic tape or the CD, and can play the audio signal received by the bluetooth or the audio signal received by the antenna, thereby realizing a plurality of functions, and the five functions can play the audio signal selectively by switching the switch circuit. Regarding the electric player core and the electric singing circuit, the electric singing core and the electric singing circuit of the existing electric singing machine can be adopted, which is the prior art. The tape audio circuit, AM/FM radio circuit, CD circuit and Bluetooth circuit can be realized by the existing tape player, radio, CD player and Bluetooth module. The switching circuit may be implemented in various manners, for example, a single pole multiple throw switch may be used to implement the switching selection of the five functions, or may be implemented by a combination circuit of multiple single pole double throw switches, or may be implemented by a relay circuit, and various implementations are not described in detail herein. The volume control circuit, the power amplifying circuit and the rectifying circuit are all common circuits in the prior art, and are not described herein. The power transformer converts AC220V to DC12V to power the power amplifying circuit and the switching circuit, and the AC-DC conversion is known in the art and will not be described in detail herein.
Preferably, the multifunctional combined record player device further comprises: an LED display screen 23; the LED display screen 23 is connected with the change-over switch circuit 17. In particular, the multifunctional combined record player device of the invention is further provided with an LED display screen which can be used for displaying the volume parameters of the five functions, such as volume size, song name and the like, and also can be used for displaying the working parameters of the record player.
Preferably, the multifunctional combined record player device further comprises: a headphone interface 24 and an RCA output interface 25; the earphone interface 24 is connected with the power amplifying circuit 19, and the RCA output interface 15 is connected with the change-over switch circuit 17. Specifically, the multifunctional combined record player device provided by the invention not only has a speaker function, but also can output audio signals to the earphone through the earphone interface 24, so that a user can answer the audio signals through the earphone. The audio may also be transmitted to other electronic devices for audio playback via an RCA output interface, such as a television or video disc player, and the RAC output interface is an existing standard interface, which is not described in detail herein.
Further, when the music received by the radio is played on the record player in practical application, the situations of poor tone quality and unstable audio signal received by the antenna still occur, so that the use of the radio function by a user is affected, and the listening effect of the music is reduced. In order to avoid the above-mentioned situation, the present invention further improves the AM/FM radio circuit, please refer to fig. 2, fig. 2 is a block diagram of a preferred embodiment of the AM/FM radio circuit provided by the present invention, and preferably, the AM/FM radio circuit 14 includes: an AM bar antenna 110 for receiving an AM signal; an FM antenna 120 for receiving FM signals; an electrostatic protection module 130 for electrostatic protection of FM signals; a radio module 140 for converting AM signals or FM signals into corresponding audio signals; an audio output module 150 for filtering the audio signal; a select tuning module 160 for performing AM or FM selection and tuning; the radio power supply voltage stabilizing module 170 is used for stabilizing the power supply voltage; a clock module 180 for providing a clock signal; an LED indication module 190 for signal indication; the AM magnetic rod antenna 110 is connected with an audio output module 150 through a radio module 140; the FM antenna 120, the electrostatic protection module 130, the radio module 140 and the audio output module 150 are sequentially connected; the radio power supply voltage stabilizing module 170, the clock module 180 and the LED indication module 190 are respectively connected with the radio module 140; the radio module 140 is also connected with a radio power supply voltage stabilizing module 170 through a selective tuning module 160
Specifically, the AM/FM radio circuit is arranged on a PCB of the record player, receives corresponding wireless broadcast signals through an AM magnetic rod antenna and an FM antenna, analyzes and converts the wireless broadcast signals into corresponding audio left and right channel signals through a radio module, then filters and outputs the audio left and right channel signals, and plays through a loudspeaker of the record player, so that a user can hear the AM broadcast and the FM broadcast. In practical application, the user can adjust and select the tuning module so as to control the radio module to change the tuning. The invention stabilizes the power supply voltage through the radio power supply voltage stabilizing module, so that the radio circuit of the record player works more stably, and the audio output module filters the audio left and right channel signals, so that the record player plays wireless broadcast signals more clearly and has better sound quality. The invention also indicates whether to work or not through the LED indication module, thereby bringing great convenience to users. The invention adds the radio circuit on the record player, so that the record player also has the AM/FM radio function, and great convenience is brought to users.
Preferably, referring to fig. 3, fig. 3 is a circuit schematic of an application embodiment of the AM/FM radio circuit provided by the present invention, and in practical application, the AM/FM radio circuit is shown in fig. 3. The electrostatic protection module 130 includes: a first diode D1, a second diode D2, a first capacitor C1, and a second capacitor C2; the anode of the first diode D1 is connected with the FM antenna FM, the cathode of the second diode D2 and the radio module 140, respectively; the cathode of the first diode D1 is connected to the radio module 140 through a first capacitor C1 and a second capacitor C2, respectively; the cathode of the first diode D1 is grounded; the anode of the second diode D2 is connected to the cathode of the first diode D1. Specifically, due to the frequency band of the FM antenna, an electrostatic protection module 130 is added between the FM antenna 120 and the radio module 140 for electrostatic protection. The electrostatic protection and the filtering are realized by connecting two diodes which are opposite in direction in parallel, and also by a first capacitor C1 and a second capacitor C2.
Preferably, the radio module 140 includes: a radio chip U1; the AMINN pin and the AMINP pin of the radio chip U1 are both connected with the AM magnetic rod antenna 110; the RFINP pin of the radio chip U1 is respectively connected with the FM antenna 120 and the electrostatic protection module 130; the RFGNDE pin, the DVSS pin and the DVDD pin of the radio chip U1 are all connected with the electrostatic protection module 130; the STIN pin of the radio chip U1 is connected with a radio power supply voltage stabilizing module 170; the ST pin of the radio chip U1 is connected with the LED indication module 190; the TUNINP pin, the VOL pin and the AM-FM pin of the radio chip U1 are suspended; the RFVDD pin, the AVDD pin, the STALP pin, the XTALN pin and the AVSS pin of the radio chip are all connected with the clock module 180; the LOUT pin and the ROUT pin of the radio chip U1 are both connected to the audio output module 150; the SPAN pin and the CH pin of the radio chip U1 are both connected to the station selection module 160. Specifically, the RFINP pin of the radio receiving chip U1 is connected to the FM antenna 120, and is also connected to the anode of the first diode of the electrostatic protection module 130; the RFGNDE pin and the DVSS pin of the radio chip U1 are grounded, and the DVDD pin of the radio chip U1 is grounded through a second capacitor. Wherein, the pin is suspended, i.e. unloaded, and is not connected into the circuit. In practical application, the model of the radio chip is KT0932, and other AM/FM chips for radio can be adopted.
Preferably, the audio output module 150 includes: the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7 and the eighth capacitor C8; one end of the third capacitor C3 is connected to the radio module 140 and is grounded through the first resistor R1; the other end of the third capacitor C3 is connected with the audio left channel output end TULI through a third resistor R3 and a seventh capacitor C7 in sequence, and is grounded through a fifth capacitor C5; one end of the fourth capacitor C4 is connected to the radio module 140 and is grounded through a second resistor R2; the other end of the fourth capacitor C4 is connected with the audio right channel output end TURI through a fourth resistor R4 and an eighth capacitor C8 in sequence, and is grounded through a sixth capacitor C6. Specifically, the invention further adds an audio output module to the radio circuit to filter the audio left and right channel signals. As shown in fig. 3, the LOUT pin of the sound receiving chip U1 is grounded through the first resistor R1, and is further connected to the audio left channel output terminal tune through the third capacitor, the third resistor and the seventh capacitor in sequence, that is, the audio left channel signal is filtered through the circuit. Similarly, the ROUT pin of the radio chip U1 is grounded through the second resistor, and is connected to the audio right channel output terminal tur through the fourth capacitor, the fourth resistor and the eighth capacitor in sequence, so as to filter the audio re-channel signal. This results in a better sound quality of the resulting radio broadcast signal.
Preferably, the selective tuning module 160 includes: a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first switch JK1, and a sliding resistor VR1; the sliding end of the sliding resistor VR1 is connected with the radio module 140 (i.e., the CH pin of the radio chip U1); the first fixed end of the sliding resistor VR1 is connected to the radio power supply voltage stabilizing module 170, and is further connected to the radio module 140 (i.e. the SPAN pin of the radio chip U1) and the first switch JK1 through the fifth resistor R5; the second fixed end of the sliding resistor VR1 is grounded; the first switch JK1 is grounded through a sixth resistor R6 and a seventh resistor R7, respectively. Specifically, when listening to AM/FM broadcast signals, frequency modulation is needed to change channels, namely, broadcast stations in different frequency bands are listened to, so that a user can conveniently adjust the channels on a record player and the cost is saved, the novel radio frequency modulation device is used for adjusting the channels through a sliding resistor VR1, and the channel modulation device correspondingly feeds back through CH pins of a radio chip U1 through adjusting the resistance of the VR1, so that the channel modulation is realized. In practical application, a user can adjust the first switch JK1 to realize tuning.
Preferably, in order to listen to the wireless broadcast more stably, a voltage stabilizing circuit is added to the power voltage, and the radio power voltage stabilizing module 170 includes: eighth resistor R8, ninth resistor R9, eleventh resistor R11, twelfth resistor R12, second switch JK2, ninth capacitor C9, tenth capacitor C10, eleventh capacitor C11, twelfth capacitor C12, voltage stabilizing chip U2, first inductor L1 and second inductor L2; the VIN pin of the voltage stabilizing chip U2 is connected with a power supply voltage end VCC through an eighth resistor R8 and is grounded through a ninth capacitor C9 and a tenth capacitor C10 respectively; the DGND pin of the voltage stabilizing chip U2 is grounded; the OUT pin of the voltage stabilizing chip U2 is grounded through an eleventh capacitor C11 and a twelfth capacitor C12 respectively; the OUT pin of the voltage stabilizing chip U2 is further connected to the radio module 140 (i.e., the DVDD pin of the radio chip U1) through a ninth resistor R9 and a first inductor L1 in sequence, and is further connected to the selective tuning module 160 (i.e., the first fixed end of the sliding resistor VR 1) through the ninth resistor R9 and a second inductor L2 in sequence; the ninth resistor R9 is connected to the second switch JK2 through the first inductor L1 and the twelfth resistor R12 in sequence, and the second switch JK2 is connected to the radio module 140 (i.e. the STIN pin of the radio chip U1); the second switch JK2 is also grounded through an eleventh resistor R11. Specifically, the voltage stabilizing chip U2 may be a voltage stabilizing chip with the model HT7533, and other voltage stabilizing chips may be used. The invention adds the voltage stabilizing circuit to stabilize the voltage of the power supply voltage VCC, so that the voltage provided for the radio receiving chip U1 is more stable, the radio receiving circuit of the record player works more stably, the service life is greatly prolonged, and the circuit is more stable and safer. The first inductor L1 and the second inductor L2 are further added, so that the power supply to the radio module and the selective tuning module is more stable. In practical application, the user can control the operation of the radio circuit by adjusting the second switch JK 2.
With continued reference to fig. 3, the LED indication module 190 preferably includes: a tenth resistor R10 and a third diode D3; the anode of the third diode D3 is connected to the radio module 140 (i.e. ST pin of the radio chip U1) through a tenth resistor R10, and the cathode of the third diode D3 is grounded. Specifically, the LED indication module 190 is added to indicate the operation status of the radio circuit of the record player, and the on/off status can be used to indicate whether the record player is operating.
Preferably, the clock module 180 includes: thirteenth capacitor C13, fourteenth capacitor C14, fifteenth capacitor C15, sixteenth capacitor C16 and crystal oscillator Y1; one end of the crystal oscillator Y1 is connected with a radio module 140 (namely a STALP pin of the radio chip U1) and is grounded through a fifteenth capacitor C15; the other end of the crystal oscillator Y1 is connected with a radio module 140 (namely an XTALN pin of the radio chip U1) and is grounded through a sixteenth capacitor C16; one end of the thirteenth capacitor C13 is connected to the chip power supply terminal VDD and the radio module 140 (i.e., the RFVDD pin and the AVDD pin of the radio chip U1), and the other end is grounded; one end of the fourteenth capacitor C14 is connected to the chip power supply terminal VDD and the radio module 140 (i.e., the RFVDD pin and the AVDD pin of the radio chip U1), respectively, and the other end is grounded. In practical application, the AVSS pin of the radio chip U1 is also grounded through a sixteenth capacitor C16. Specifically, the clock signal generated by the crystal oscillator enables the radio receiving circuit to operate in time sequence. Regarding the power supply voltage terminal VCC and the chip power supply terminal VDD, the voltage value can be set according to the actual circuit. The invention further provides an AM/FM radio circuit, so that the record player also has AM and FM radio functions, works stably, has good tone quality and has good application prospect.
Referring to fig. 4, fig. 4 is an exploded view of the structure of the multifunctional combined record player according to the present invention. As shown in fig. 4, the present invention also provides a multifunctional combo-jukebox, comprising: the box body 30, the box body 30 includes a bottom plate 31 and a top cover 32 which are oppositely arranged, a first side wall 33, a second side wall 34, a third side wall 35 and a fourth side wall 36 are sequentially arranged between the bottom plate 31 and the top cover 32 in a surrounding manner, a plurality of openings are formed in the first side wall 33 of the box body 30, a loudspeaker 20 and a control panel 37 for controlling the combined record player are arranged at the opening of the first side wall 33, and a CD playing device 38 for playing a CD is also arranged at the opening of the first side wall 33; an opening is arranged on the second side wall 34 of the box body 30, and a tape playing device 39 for playing the tape is arranged at the opening of the second side wall 34; a middle partition plate 40 is arranged in the box body 30, an opening is formed in the middle partition plate 40, and an electric singing machine core 11 is arranged at the opening of the middle partition plate 40;
wherein, the control panel 37 is provided with a PCB board 41, and the PCB board 41 is provided with an electric singing circuit 12 for processing audio signals of a record, a tape audio circuit 13 for reading the tape audio signals, an AM/FM radio circuit 14 for receiving the AM/FM audio signals, a CD circuit 15 for reading CD audio signals, a bluetooth circuit 16 for receiving bluetooth audio signals, a switch circuit 17 for switching audio signal output, a volume control circuit 18 for adjusting volume of audio signals, a power amplifying circuit 19 for amplifying audio signals, a power transformer 21 for performing ac/dc conversion, and a rectifying circuit 22 for rectifying dc signals;
the record player core 11 is electrically connected with the record circuit 12; the CD playing device 38 is electrically connected with the CD circuit 15; the tape playing device 39 is electrically connected with the tape audio circuit 13; the electric singing circuit 12, the magnetic tape audio circuit 13, the AM/FM radio circuit 14, the CD circuit 15 and the Bluetooth circuit 16 are respectively connected with the change-over switch circuit 17; the change-over switch circuit 17 is electrically connected with a loudspeaker 20 through a volume control circuit 18 and a power amplification circuit 19 in sequence; the power transformer 21 is connected to the switching circuit 17 and the power amplifying circuit 19 through the rectifying circuit 22, respectively.
Specifically, in order to further save space and reduce the volume of the product and achieve miniaturization of the compact disc player, the multifunctional combined compact disc player provided by the present invention has a structure in which a casing 30 is formed by six flat plates, namely a bottom plate 31 and a top cover 32 which are opposite to each other from top to bottom, and four side surfaces, namely a first side wall 33, a second side wall 34, a third side wall 35 and a fourth side wall 36, which are sequentially connected. In order to reduce the volume of the product, the first side wall 33 is provided with a plurality of openings, as shown in fig. 4, three openings are provided, wherein the openings on two sides are used for placing or accommodating the speakers 20, that is, two speakers 20 or speakers are provided, and the larger opening in the middle is used for placing a control panel 37 for controlling the combination record player, so that the volume of the product is reduced, and a user can operate and control the working condition of the record player on the first side wall. Regarding the control panel 37, a plurality of corresponding control buttons are provided thereon, which is a conventional technique. Preferably, a CD playing device 38 is further disposed at the larger opening in the middle of the first side wall, and the main structure of the CD playing device 38 is disposed inside the box, and the CD can be placed into the CD playing device 38 for playing through the opening of the first side wall. While the CD player 38 has various implementations in the prior art, it is not described in detail herein. Similarly, an opening is formed in the second side wall 34, and for accommodating the tape playing device 39, the main structure of the tape playing device 39 is also that the user plays the tape in the tape playing device 39 through the opening of the second side wall 34. Also, a middle partition 40 is provided inside the case 30, and the middle partition 40 is opened to house the jukebox core 11. In practical application, the control panel 37 is provided with a PCB 41, and the PCB 41 is provided with a circuit as shown in fig. 1, and the PCB is electrically connected with the record player core 11, the CD playing device 38 and the tape playing device 39, so as to process audio signal processing with different functions in a centralized manner, and thus, the product structure is compact and smaller. The above-mentioned circuit is the same as the circuit in the multifunctional combined record player device and will not be described here again.
Preferably, a plurality of sound guide holes 42 are formed in the third side wall 35 of the case 30. For better sound quality of the multifunctional combined record player, a plurality of sound guide holes 42, preferably 2 sound guide holes, are formed in the third side wall 35.
Preferably, an LED display screen 23 is provided on the control panel 37, and the LED display screen 23 is electrically connected to the switch circuit 17. That is, the LED display screen can display the operating state and parameters of the multifunctional combined record player, and the present invention is arranged on the control panel 37, which is beneficial for the user to observe the adjustment result at the same time when adjusting on the control panel.
In summary, the present invention provides a multifunctional combined record player and a device thereof, comprising: the device comprises an electric singing machine core, an electric singing circuit, a magnetic tape audio circuit, an AM/FM radio circuit, a CD circuit, a Bluetooth circuit, a change-over switch circuit, a volume control circuit, a power amplification circuit, a loudspeaker, a power transformer and a rectifying circuit; the record player core is connected with the record circuit; the electric singing circuit, the magnetic tape audio circuit, the AM/FM radio circuit, the CD circuit and the Bluetooth circuit are respectively connected with the change-over switch circuit; the switching circuit is connected with the loudspeaker through the volume control circuit and the power amplification circuit in sequence; the power transformer is respectively connected with the change-over switch circuit and the power amplifying circuit through the rectifying circuit, so that the record player can play audio signals of a black record, a magnetic tape, a CD, bluetooth, a radio and other sources, and the functions bring great convenience to users, the tone quality is good, the product structure is compact, and great convenience is brought.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (8)
1. A multi-functional combination record player device, comprising:
an electric singing movement for reading audio signals of a record;
an electrical singing circuit for processing audio signals of a record;
a tape audio circuit for reading the tape audio signal;
an AM/FM radio circuit for receiving an AM/FM audio signal;
a CD circuit for reading the CD audio signal;
a bluetooth circuit for receiving bluetooth audio signals;
a switching circuit for switching the audio signal output;
a volume control circuit for adjusting the volume of the audio signal;
a power amplifying circuit for amplifying the audio signal;
a speaker for playing audio signals;
the power transformer is used for performing alternating current-direct current conversion;
a rectifying circuit for rectifying a direct current signal;
the record player core is connected with the record circuit; the electric singing circuit, the magnetic tape audio circuit, the AM/FM radio circuit, the CD circuit and the Bluetooth circuit are respectively connected with the change-over switch circuit; the switching circuit is connected with the loudspeaker through the volume control circuit and the power amplification circuit in sequence; the power transformer is respectively connected with the change-over switch circuit and the power amplifying circuit through the rectifying circuit;
the AM/FM radio circuit comprises:
an AM bar antenna for receiving an AM signal;
an FM antenna for receiving FM signals;
the electrostatic protection module is used for carrying out electrostatic protection on the FM signal;
a radio module for converting an AM signal or an FM signal into a corresponding audio signal;
an audio output module for filtering the audio signal;
the selecting and tuning module is used for selecting AM or FM and tuning;
the radio power supply voltage stabilizing module is used for stabilizing the voltage of the power supply;
a clock module for providing a clock signal, the clock module for operating the AM/FM radio circuit in a time sequence;
the LED indication module is used for carrying out signal indication;
the AM magnetic rod antenna is connected with the audio output module through the radio module; the FM antenna, the electrostatic protection module, the radio module and the audio output module are sequentially connected; the radio power supply voltage stabilizing module, the clock module and the LED indication module are respectively connected with the radio module; the radio module is also connected with a radio power supply voltage stabilizing module through a selective tuning module;
an LED display screen; the LED display screen is connected with the change-over switch circuit.
2. The multi-function, combination jukebox device of claim 1, further comprising: a headset interface and an RCA output interface; the earphone interface is connected with the power amplifying circuit, and the RCA output interface is connected with the change-over switch circuit.
3. The multi-function, combination jukebox device of claim 1, wherein the electrostatic protection module comprises: the first diode, the second diode, the first capacitor and the second capacitor; the anode of the first diode is respectively connected with the FM antenna, the cathode of the second diode and the radio module; the cathode of the first diode is connected with the radio module through a first capacitor and a second capacitor respectively; the cathode of the first diode is grounded; the anode of the second diode is connected with the cathode of the first diode;
the radio module includes: a radio chip; the AMINN pin and the AMINP pin of the radio chip are connected with an AM magnetic rod antenna; the RFINP pin of the radio chip is respectively connected with the FM antenna and the electrostatic protection module; the RFGNDE pin, the DVSS pin and the DVDD pin of the radio chip are all connected with the electrostatic protection module; the STIN pin of the radio chip is connected with a radio power supply voltage stabilizing module; the ST pin of the radio chip is connected with the LED indication module; the TUNINP pin, the VOL pin and the AM-FM pin of the radio chip are suspended; the RFVDD pin, the AVDD pin, the STALP pin, the XTALN pin and the AVSS pin of the radio chip are all connected with a clock module; the LOUT pin and the ROUT pin of the radio chip are connected with the audio output module; the SPAN pin and the CH pin of the radio chip are both connected with a selection tuning module; the model of the radio chip is KT0932.
4. The multi-function, combination jukebox device of claim 1, wherein the audio output module comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor and an eighth capacitor; one end of the third capacitor is connected with the radio module and is grounded through a first resistor; the other end of the third capacitor is connected with the output end of the audio left channel through a third resistor and a seventh capacitor in sequence, and is grounded through a fifth capacitor; one end of the fourth capacitor is connected with the radio module and is grounded through a second resistor; the other end of the fourth capacitor is connected with the output end of the audio right channel through a fourth resistor and an eighth capacitor in sequence, and is grounded through a sixth capacitor;
the selective tuning module comprises: a fifth resistor, a sixth resistor, a seventh resistor, a first switch and a sliding resistor; the sliding end of the sliding resistor is connected with the radio module; the first fixed end of the sliding resistor is connected with the radio power supply voltage stabilizing module and is also connected with the radio module and the first switch respectively through a fifth resistor; the second fixed end of the sliding resistor is grounded; the first switch is grounded through a sixth resistor and a seventh resistor respectively.
5. The multi-function, combination jukebox device of claim 1, wherein the radio power regulator module comprises: eighth resistor, ninth resistor, eleventh resistor, twelfth resistor, second switch, ninth capacitor, tenth capacitor, eleventh capacitor, twelfth capacitor, voltage stabilizing chip, first inductor and second inductor; the VIN pin of the voltage stabilizing chip is connected with a power supply voltage end through an eighth resistor and is grounded through a ninth capacitor and a tenth capacitor respectively; the DGND pin of the voltage stabilizing chip is grounded; an OUT pin of the voltage stabilizing chip is grounded through an eleventh capacitor and a twelfth capacitor respectively; the OUT pin of the voltage stabilizing chip is connected with the radio module through a ninth resistor and a first inductor in sequence, and is connected with the selective tuning module through the ninth resistor and a second inductor in sequence; the ninth resistor is connected with a second switch through the first inductor and the twelfth resistor in sequence, and the second switch is connected with the radio module; the second switch is also grounded through an eleventh resistor;
the LED indication module comprises: a tenth resistor and a third diode; the anode of the third diode is connected with the radio module through a tenth resistor, and the cathode of the third diode is grounded;
the clock module includes: thirteenth, fourteenth, fifteenth, sixteenth and crystal oscillator; one end of the crystal oscillator is connected with the radio module and is grounded through a fifteenth capacitor; the other end of the crystal oscillator is connected with the radio module and is grounded through a sixteenth capacitor; one end of the thirteenth capacitor is respectively connected with the chip power supply end and the radio module, and the other end of the thirteenth capacitor is grounded; one end of the fourteenth capacitor is connected with the power supply end of the chip and the radio module respectively, and the other end of the fourteenth capacitor is grounded.
6. A multi-function combination record player, comprising: the box body comprises a bottom plate and a top cover which are oppositely arranged, a first side wall, a second side wall, a third side wall and a fourth side wall are sequentially arranged between the bottom plate and the top cover in a surrounding mode, a plurality of openings are formed in the first side wall of the box body, a loudspeaker and a control panel for controlling the combined record player are arranged at the opening of the first side wall, and a CD playing device for playing a CD is further arranged at the opening of the first side wall; an opening is arranged on the second side wall of the box body, and a tape playing device for playing the tape is arranged at the opening of the second side wall; a middle partition plate is arranged in the box body, an opening is formed in the middle partition plate, and an electric singing machine core is arranged at the opening of the middle partition plate;
the control panel is internally provided with a PCB board, and the PCB board is provided with an electric singing circuit for processing an audio signal of an album, a magnetic tape audio circuit for reading the magnetic tape audio signal, an AM/FM radio circuit for receiving an AM/FM audio signal, a CD circuit for reading a CD audio signal, a Bluetooth circuit for receiving a Bluetooth audio signal, a change-over switch circuit for switching audio signal output, a volume control circuit for adjusting the volume of the audio signal, a power amplification circuit for amplifying the audio signal, a power transformer for performing AC/DC conversion and a rectification circuit for rectifying a DC signal;
the record player core is electrically connected with the record circuit; the CD playing device is electrically connected with a CD circuit; the tape playing device is electrically connected with a tape audio circuit; the electric singing circuit, the magnetic tape audio circuit, the AM/FM radio circuit, the CD circuit and the Bluetooth circuit are respectively connected with the change-over switch circuit; the switching circuit is electrically connected with the loudspeaker through the volume control circuit and the power amplification circuit in sequence; the power transformer is respectively connected with the change-over switch circuit and the power amplifying circuit through the rectifying circuit;
the AM/FM radio circuit comprises:
an AM bar antenna for receiving an AM signal;
an FM antenna for receiving FM signals;
the electrostatic protection module is used for carrying out electrostatic protection on the FM signal;
a radio module for converting an AM signal or an FM signal into a corresponding audio signal;
an audio output module for filtering the audio signal;
the selecting and tuning module is used for selecting AM or FM and tuning;
the radio power supply voltage stabilizing module is used for stabilizing the voltage of the power supply;
a clock module for providing a clock signal, the clock module for operating the AM/FM radio circuit in a time sequence;
the LED indication module is used for carrying out signal indication;
the AM magnetic rod antenna is connected with the audio output module through the radio module; the FM antenna, the electrostatic protection module, the radio module and the audio output module are sequentially connected; the radio power supply voltage stabilizing module, the clock module and the LED indication module are respectively connected with the radio module; the radio module is also connected with a radio power supply voltage stabilizing module through a selective tuning module;
an LED display screen; the LED display screen is connected with the change-over switch circuit.
7. The multifunctional compact jukebox of claim 6, wherein a plurality of sound guide holes are formed in the third side wall of the box.
8. The multifunctional compact jukebox of claim 6, wherein an LED display screen is provided on the control panel, the LED display screen being electrically connected to a switcher circuit.
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| CN201711431430.9A CN107886976B (en) | 2017-12-26 | 2017-12-26 | Multifunctional combined record player and device thereof |
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| CN201711431430.9A CN107886976B (en) | 2017-12-26 | 2017-12-26 | Multifunctional combined record player and device thereof |
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| CN107886976A CN107886976A (en) | 2018-04-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108882099A (en) * | 2018-06-21 | 2018-11-23 | 广东理丹电子科技股份有限公司 | A kind of multifunctional sound box |
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| CN107886976A (en) | 2018-04-06 |
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