CN219533897U - Preschool children language training device - Google Patents

Abstract

The device comprises a shell, a storage battery, a long-time recording and playing module, a light emitting diode, a time control circuit, a conversion circuit, a detection circuit and a playing circuit; the storage battery, the long-time recording and playing module, the light emitting diode, the time control circuit, the conversion circuit, the detection circuit and the playing circuit are arranged in the shell and are electrically connected. The parents can change the language learning content at any time, the training learning content is wider, and the use cost is correspondingly reduced; in learning, the time control circuit and the like can automatically play a section of related language content at certain intervals, the higher the enthusiasm of children for reading is, the more the sound is, the higher the voltage signal output by the conversion circuit is, and further, the more the number of the corresponding lighted light emitting diodes is, the larger the graceful music sound played by the loudspeaker is, so that the interaction effect between language training and learning is achieved, the learning enthusiasm of the children is improved, and the better learning effect can be achieved relatively.

Description

Preschool children language training device

Technical Field

The utility model relates to the technical field of early education equipment, in particular to a pre-school children language training device.

Background

In the process of learning voice, parents perform one-to-one language training on the children in low ages, which is a main means for learning and mastering language ability of the children in low ages. However, parents are busy with work or households and the like, and do not have too much effort to train language teaching on children in low age groups, so in the prior art, electronic language early teaching equipment (generally comprising a click-reading early teaching machine and a recording and reading early teaching machine, when the click-reading early teaching machine is used, children click corresponding patterns, the equipment emits corresponding language sounds, the children follow-reading is carried out, but the defects that the corresponding language content of the patterns is not replaceable and the price of the patterns is relatively expensive exist, the application is limited, in the application of the recording and reading early teaching machine, parents can replace the language content and the children follow-reading at any time, and the electronic language early teaching equipment has the advantages of being capable of replacing the early teaching language content at any time and low in use cost) is brought to the parents, and the language learning effect of the children in low age groups is also correspondingly improved.

Along with the progress of electronic technology, the functions of language early education equipment are more and more perfect, such as "201620095380.6" of China and "voice early education machine" of patent name (training language ability of children through a click-to-read mode), and the content of the language early education equipment is recorded as "the early education machine can reduce the impact force received by the language early education machine, and meanwhile, dust can be prevented from entering, so that the service life is long, pages of a book are smoother, and workers are more convenient to encase and pack. The above-mentioned patent has a longer service life, but the same as the prior click-to-read early education machine, the present patent has the disadvantages that the language content corresponding to the pattern is not replaceable and the cost is high, and the application is limited. The inventor inputs a keyword ' record and read early education machine ' in the national bureau and a professional patent retrieval website, retrieves a patent close to the technical scheme of the utility model, and the patent number ' 201922134539.7 and the patent name ' record pen equipment capable of reading by one key ', wherein the content is recorded as ' when the read key is pressed down, level change is generated between the read key and the main control unit ', after the main control unit detects the level change, the first microphone and the second microphone are opened to collect sound, the main control unit converts the collected sound into a digital signal to be stored, and after the sound is collected, the main control unit converts the collected digital signal into an analog signal to broadcast the analog signal through the sound amplifier, so that one sentence is read and one sentence is broadcast, and the learning is convenient. The above-mentioned comparison patent 2 is used for early language teaching of children and can realize better following language training effect, but is limited by structure, because children do not have corresponding sound or light and the like to excite the children when following the reading, that is to say, in language learning, the process is relatively boring, the language learning enthusiasm is not improved, and a certain adverse effect is brought to the early language teaching effect more or less.

Disclosure of Invention

In order to overcome the defects of the prior preschool children language early education equipment as described in the background due to the limited structure, the utility model provides the preschool children language training device which can change the content of language learning training at any time by parents under the combined action of related circuits, can automatically play related language content at certain intervals in the learning training, has higher enthusiasm for children to read, has more light emitting diodes which are lightened correspondingly and has larger sound of graceful music played by a loudspeaker, thereby achieving the interaction effect between the language learning and the children, improving the learning enthusiasm of the children and relatively achieving better learning effect.

The technical scheme adopted for solving the technical problems is as follows:

the device for training the language of the preschool child comprises a shell, a storage battery, a long-time recording and playing module and a light emitting diode, and is characterized by also comprising a time control circuit, a conversion circuit, a detection circuit and a playing circuit; the storage battery, the long-time recording and playing module, the light emitting diode, the time control circuit, the conversion circuit, the detection circuit and the playing circuit are arranged in the shell; the number of the light emitting diodes is more than one, and the number of the detection circuits is two; the storage battery is electrically connected with the power input ends of the long-time recording and playing module, the time control circuit and the detection circuit, the signal input end of the time control circuit at the signal output end of the long-time recording and playing module is electrically connected with the power output end of the time control circuit and the power input end of the conversion circuit; the signal output end of the conversion circuit is electrically connected with the power input end of the playing circuit and the signal input end of the detection circuit respectively, and the power output ends of the two paths of detection circuits are electrically connected with the power input ends of the plurality of light emitting diodes; the control end of the time control circuit is electrically connected with the two contacts below the next song selection key of the long-time recording and playing module respectively.

Further, the time control circuit comprises an electric connection relay, a buzzer, a time control switch, a diode, a resistor, an NPN triode and a capacitor, wherein the two ends of a power output of the time control switch are respectively connected with the two ends of a power input of the first relay, one end of the buzzer is connected with the anode of the diode, the cathode of the diode is connected with the anode of the capacitor, one end of the resistor is connected with the base of the NPN triode, the collector of the NPN triode is connected with a second power input end of the negative electrode of the relay, the negative electrode of the capacitor is connected with an emitter of the NPN triode, the negative power input end of the time control switch, and the second power input end of the control power input end of the relay, the positive power input end of the time control switch are connected.

Further, the conversion circuit comprises an electret microphone, an NPN triode, a capacitor, an adjustable resistor and a resistor which are electrically connected, one end of a fourth resistor is connected with one end of the first resistor and one end of the adjustable resistor, the other end of the adjustable resistor is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the capacitor, the base electrode of the first NPN triode, the other end of the fourth resistor is connected with one end of the electret microphone and the other end of the capacitor, the other end of the first resistor is connected with one end of the third resistor and the collector electrode of the second NPN triode, the other end of the third resistor is connected with the base electrode of the first NPN triode, the emitter electrode of the second NPN triode is connected with one end of the fifth resistor, and the other end of the electret microphone is connected with the emitter electrode of the first NPN triode and the other end of the fifth resistor.

Further, the first path of detection circuit comprises an adjustable resistor, a resistor, an NPN triode and a relay which are electrically connected, wherein the positive electrode of the relay is connected with the input end of a control power supply, one end of the adjustable resistor is connected with one end of the first resistor, one end of the second resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, the collector electrode of the NPN triode is connected with the input end of a power supply of the negative electrode of the relay, the normally open contact end of the relay is connected with one end of the third resistor, and the other end of the first resistor is connected with the emitter of the NPN triode.

Further, the playing circuit comprises a music module and a loudspeaker which are electrically connected, and two ends of the loudspeaker are respectively connected with two ends of the audio output of the music module.

The utility model has the beneficial effects that: in the novel language learning system, parents can record multiple sections (at most 500 sections) of different language teaching contents for the parents through the long-time recording and playing module, so that the parents can change the contents of language learning at any time, the contents of training learning are wider, and the use cost is correspondingly reduced; in learning, the time control circuit and the like can automatically play a section of related language content at certain intervals, the higher the enthusiasm of children for reading is, the more the sound is, the higher the voltage signal output by the conversion circuit is, and further, the more the number of the corresponding lighted light emitting diodes is, the larger the graceful music sound played by the loudspeaker is, so that the interaction effect between language training and learning is achieved, the learning enthusiasm of the children is improved, and the better learning effect can be achieved relatively. Based on the above-mentioned that, the novel method has good application prospect.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a circuit diagram of the present utility model.

Detailed Description

Fig. 1 and 2 show a device for training a pre-school children language, which comprises a shell 1, a storage battery G (12V, 5 Ah), a charging socket CZ (an insertion hole is positioned outside a third opening at the front end of the shell), power switches S1 and S2 (a handle is positioned outside a first opening and a second opening at the front end of the shell), a long-time recording and playing module A1, a light emitting diode, a time control circuit 2, a conversion circuit 3, a detection circuit 4 and a playing circuit 5; the storage battery G, the charging socket CZ, the power switches S1 and S2, the long-time recording and playing module A1, the light emitting diode VL1 (VL 2), the time control circuit 2, the conversion circuit 3, the detection circuit 4 and the playing circuit 5 are arranged on a circuit board in the shell 1; the detection circuit 4 has two paths, the number of the light emitting diodes VL1 (VL 2) is more, and the light emitting surfaces of the light emitting diodes VL1 (VL 2) are annularly distributed and are respectively positioned outside the middle part of the front end of the shell 1.

As shown in fig. 1 and 2, the time control circuit comprises relays K and K1, a buzzer B, a time control switch A2, a diode VD, a resistor R1, an NPN triode Q1, and a capacitor C1 which are connected through wiring of a circuit board, two power output ends 3 and 4 pins of the time control switch A2 are respectively connected with two power input ends of the first relay K, one end of the buzzer B (the sounding surface is positioned at the rear end of a fourth opening of the front end of the shell) is connected with the positive pole of the diode VD, the negative pole of the diode VD is connected with the positive pole of the capacitor C1, one end of the resistor R1 is connected with the base of the NPN triode Q1, the collector of the NPN triode Q1 is connected with the negative power input end of the second relay K1, the negative pole of the capacitor C1 is connected with the emitter of the NPN triode Q1, and the negative power input end 2 is connected with the positive power input end 1 pin of the second relay K1. The conversion circuit comprises a miniature electret microphone BX (the sound receiving surface is positioned outside a fifth opening at the front end of the element box), NPN triodes Q2 and Q3, a capacitor C2, an adjustable resistor RP1, resistors R, R, R12, R13 and R3, one end of a fourth resistor R13 is connected with one end of a first resistor R12, one end of the adjustable resistor RP1, the other end of the adjustable resistor RP1 is connected with one end of a second resistor R, the other end of the second resistor R is connected with one end of the capacitor C2, the base of the first NPN triode Q2, the other end of the fourth resistor R13 is connected with one end of the electret microphone BX, the other end of the capacitor C2, the other end of the first resistor R12 is connected with one end of a third resistor R2, the collector of the second NPN triode Q3, the base of the third resistor R2 is connected with the other end of the first NPN triode Q3, the other end of the second NPN triode Q3 is connected with one end of the fifth resistor R3, and the other end of the first NPN triode Q2 and the other end of the fifth triode Q3 are connected with the other end of the first NPN triode Q2 and the third triode Q3. The first path of detection circuit comprises an adjustable resistor RP, resistors R4, R5 and R10, an NPN triode Q4 and a relay K2 which are connected through circuit board wiring; the positive pole of the relay K2 is connected with the input end of the control power supply, one end of the adjustable resistor RP is connected with one end of the first resistor R4, one end of the second resistor R5 is connected with the base electrode of the NPN triode Q4, the collector electrode of the NPN triode Q4 is connected with the input end of the negative pole power supply of the relay K2, the normally open contact end of the relay K2 is connected with one end of the third resistor R10, and the other end of the first resistor R4 is connected with the emitter electrode of the NPN triode Q4. The second path of detection circuit comprises an adjustable resistor RP2, resistors R6, R7 and R11, an NPN triode Q5 and a relay K5 which are connected through circuit board wiring; the positive pole of the relay K5 is connected with the input end of the control power supply, one end of the adjustable resistor RP2 is connected with one end of the first resistor R6, one end of the second resistor R7 is connected with the base electrode of the NPN triode Q5, the collector electrode of the NPN triode Q5 is connected with the input end of the negative pole power supply of the relay K5, the normally open contact end of the relay K5 is connected with one end of the third resistor R11, and the other end of the first resistor R6 is connected with the emitter electrode of the NPN triode Q5. The playing circuit comprises a music module A3 and a loudspeaker B1 (the sound emitting surface is positioned at the rear end of the sixth opening at the front end of the shell), and two ends of the loudspeaker B1 are respectively connected with two ends of the audio output of the music module A3.

As shown in fig. 1 and 2, two poles of a storage battery G and two ends of a charging socket CZ are respectively connected by a wire (when the storage battery G is in no electricity, an external 12V power charger plug is inserted into the charging socket to charge the storage battery G), one end of a power switch S1 is connected by a wire, and the other end of the power switch S1, the negative pole of the storage battery G and the power input ends 1 and 2 pins of a long-time recording and playing module A1 are respectively connected by wires; the other end of the power switch S1, the negative electrode of the storage battery G, pins 1 and 2 of the time control switch A2 at the power input end of the time control circuit, positive power input ends of the relays K5 and K2 at the power input end of the detection circuit and the emitters of the NPN triodes Q4 and Q5 are respectively connected through wires. The positive pole of a diode VD at the signal input end of a 3-pin time control circuit at the signal output end of the long-time recording and playing module A1 is connected through a wire, and the normally closed contact end and the negative pole power input end of a relay K1 at the power output end of the time control circuit are respectively connected with the collector electrode of an NPN triode Q3 and the emitter electrode of an NPN triode Q2 at the power input end of the conversion circuit through wires. The emitter of NPN triode Q3 and emitter of NPN triode Q2 at signal output end of the conversion circuit and 1 and 2 feet of music module A3 at power input end of the playing circuit, signal input adjustable resistors RP, RP2 at the other end of the detection circuit and emitter ends of NPN triode Q5, Q4 are connected by wires respectively, the other ends of resistors R10, R11 at power output end of the two detection circuits and emitter ends of NPN triode Q5, Q4 are connected by wires respectively with the anode and cathode power input ends of multiple light emitting diodes VL1 and the other multiple light emitting diodes VL 2. The control contact end of the control end relay K of the time control circuit and the normally open contact end are connected with the two contacts below the next song selection key S2 key of the long-time recording and playing module A1 through wires respectively.

Before use, as shown in fig. 1 and 2, the power switch S1 is turned on, a parent presses the record key S4 of the long-time recording and playing module A1 located outside the seventh opening in front of the casing by hand, then the voice can be sounded (or language teaching content output by other audio devices is recorded), after receiving the voice content, the microphone (the sound receiving surface is located at the rear end of the eighth opening in front of the casing) on the long-time recording and playing module A1 can store the voice into the internal memory card, after each release of the record key S4, one section of recording is stopped, and at most, the voice content of about 500 sections can be recorded (for example, 3 seconds for each section of recording content). In actual use, the novel baby store is put in front of a low-age child store, the power switches S1 and S2 are turned on, and the long-time recording and playing module A1, the time control circuit and the detection circuit work electrically. In the time control circuit, after the time control switch A2 is powered on, 3 pins of the time control switch A2 can circularly output 1 second of power supply to the power supply input end (time is adjustable) of the relay K every 8 seconds, so that the relay K can be powered on for 1 second every 8 seconds, and the control contact end and the normally open contact end of the relay K are closed for 1 second within the 1 second time of power supply, which is equivalent to that a human hand presses the next song selection key S2 of the long-time recording and playing module A1 every 8 seconds, so that the long-time recording and playing module A1 can circularly play the pre-recorded multiple pieces of audio content stored in the inside through the loudspeaker B (about 3 seconds of voice content is played every time of pressing). The long-time recording and playing module A1 plays a 3-second voice content each time, a current signal output by a3 pin of the long-time recording and playing module A1 is subjected to half-wave rectification by a diode VD and filtering by a capacitor C1, a resistor R1 is used for reducing voltage and limiting current and enters a base electrode of an NPN triode Q1, a collector electrode of the NPN triode Q1 is conducted to output low level and enters a negative electrode power supply input end of a relay K1, so that the relay K1 is electrified to attract a control power supply input end and a normally closed contact end for 3 seconds within 8 seconds, and then the control power supply input end and the normally closed contact end are closed for 5 seconds; that is, after the power-on operation of the present utility model, the conversion circuit will not be powered on while the long-time recording and playing module A1 plays the voice content, and the corresponding plurality of groups of light emitting diodes will not be powered on to emit light, and the speaker B1 will not be powered on to produce sound.

As shown in fig. 1 and 2, in each 5 seconds of time (the time period is the time for which the child follows) when the 3 and 4 pins of the long-time recording and playing module A1 stop outputting the ac audio signal, the NPN triode Q1 will cut off the relay K1 and no longer draw the control power input end and the normally closed contact end to close, and then the conversion circuit will be powered on for 5 seconds. In the conversion circuit, a common emitter voltage amplifier is formed by an NPN triode Q2, a peripheral element resistor R12, an adjustable resistor RP1 and a resistor R, R, and a common emitter output device is formed by an NPN triode Q3 and a peripheral element resistor R3, when a child reads the voice content played previously, an electret microphone BX (the voltage-reducing and current-limiting function of the resistor R13) receives the voice and converts the voice into an audio signal, then the audio signal is coupled to a base electrode of the NPN triode Q2 through a capacitor C2, the NPN triode Q2 amplifies the signal and then outputs the signal from an emitter electrode of the NPN triode Q3 under the combined action of the peripheral element (the larger the sounding of the child is, the higher the signal voltage output by the emitter electrode of the NPN triode Q3 is, the lower the signal voltage output by the emitter electrode of the NPN triode Q3 is, and the larger the base bias voltage of the NPN triode Q3 is set by a technician adjusting different resistance values of the adjustable resistor RP 1).

As shown in fig. 1 and 2, when a child follows a reading sound, the emitter of the NPN triode Q3 outputs different voltage signals to enter the first and second detection circuits (meanwhile, the voltage signals are output to the power input end of the music module A3, the 3 and 4 feet of the music module A3 output audio signals to the loudspeaker B1, so that the loudspeaker B1 sends out pleasant music sound to carry out atmosphere baking on the follow reading of the child, the larger the sound of the child follows the reading, the higher the voltage signal entering the power input end of the music module A3, the larger the sound of the loudspeaker B1, the smaller the opposite is, the enthusiasm of the child for the follow reading is improved), when the child follows the reading sound relatively small, the voltage signal is divided by the adjustable resistor RP and the resistor R4, the base of the resistor R5 enters the NPN triode Q4 after the voltage is reduced and limited, the base of the NPN triode Q4 is higher than 0.7v, the collector is conducted to output a low level to enter the negative power input end of the relay K2, the relay K2 is electrified to absorb the control the power input end and the normally open contact end to be closed, and the plurality of light emitting diodes VL1 are electrified to emit light (resistor R10 is stepped down and limited); since the resistance value of the adjustable resistor RP2 is larger than RP1, the NPN triode Q5 will not be turned on, and the other multiple light emitting diodes will not be electrically lighted. When the child follows a reading with relatively loud sound, the voltage signal is divided by an adjustable resistor RP2 and a resistor R6, the voltage is reduced by the resistor R7, the current is limited and enters the base electrode of an NPN triode Q5 to be higher than 0.7V, the collector electrode of the NPN triode Q5 is conducted to output low level and enter the negative power supply input end of a relay K5, the relay K5 is electrified to absorb the control power supply input end and a normally open contact end of the relay K5 to be closed, and then a plurality of light emitting diodes VL2 are electrified to emit light (the resistor R11 is used for reducing the voltage and limiting the current); since the resistance value of the adjustable resistor RP is smaller than RP2, the NPN triode Q4 is conducted, and then a plurality of LEDs are synchronously electrified to emit light. Through the combined action of all the circuits, in the novel model, parents can record a plurality of different language teaching contents for the inside of the novel model through the long-time recording and playing module, so that the parents can change the contents of language learning at any time, the contents of training learning are wider, and the use cost is correspondingly reduced; in learning, the time control circuit and the like can automatically play a section of related language content at certain intervals, the higher the enthusiasm of children for reading is, the more the sound is, the higher the voltage signal output by the conversion circuit is, and further, the more the number of the corresponding lighted light emitting diodes is, the larger the graceful music sound played by the loudspeaker is, so that the interaction effect between language learning and children is achieved, the learning enthusiasm of the children is improved, and the better learning effect can be achieved relatively. In fig. 2, NPN transistors Q1, Q2, Q3, Q4, Q5 are model 9013; the resistances of the resistors R1, R12, R, R2, R3, R4, R5, R6, R7, R10, R11 and R13 are respectively 10K, 200 omega, 10K, 510 omega, 200 omega, 10K, 47K, 1.8K and 100K; the adjustable resistors RP1, RP2 are 470K (the embodiment is respectively adjusted to 28K, 34K and 42K); the relays K, K, K2, K5 are DC12V relays; the model VD of the diode is 1N4007; the speaker B, B is a moving coil 0.5W speaker; the time control switch A2 is a full-automatic microcomputer time control switch finished product with the model KG316T, the microcomputer time control switch is provided with a display screen, seven keys of cancel/restore, timing, correction, week correction, automatic/manual, timing and clock are provided, the time control switch is provided with two power input ends 1 and 2 pins, two power output ends 3 and 4 pins, and a user can respectively press and operate the seven keys to set the interval time of the power output ends outputting power and the time of outputting power each time; the light emitting diodes VL1, VL2 are red light emitting diodes; the model of the capacitor C1 is 470 mu F/25V (filtering); the capacitor model C2 is 0.1 μF (coupling); the long-time recording and playing module A1 is a finished product of a high-tone quality long-time multi-section recording and playing module with a model BALWAY and a memory card, and is provided with two power input ends, a playing key (the two contacts of the playing key are short-circuited in the embodiment), a recording key, a next song option key and a previous song option key; the music module is an integrated music piece of model H82 (sound production content is a graceful baby song and the like) and is provided with two power input ends and two audio output ends; the electret microphone model was 9767L.

It should be noted that while the above describes and illustrates embodiments of the present utility model, it is not intended that the embodiments include only a single embodiment, but that this description is made for the sake of clarity only, and it will be appreciated by one skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and other embodiments will be understood by those skilled in the art, and accordingly, the scope of the utility model is defined by the appended claims and their equivalents.

Claims (5)

1. The device for training the language of the preschool child comprises a shell, a storage battery, a long-time recording and playing module and a light emitting diode, and is characterized by also comprising a time control circuit, a conversion circuit, a detection circuit and a playing circuit; the storage battery, the long-time recording and playing module, the light emitting diode, the time control circuit, the conversion circuit, the detection circuit and the playing circuit are arranged in the shell; the number of the light emitting diodes is more than one, and the number of the detection circuits is two; the storage battery is electrically connected with the power input ends of the long-time recording and playing module, the time control circuit and the detection circuit, the signal input end of the time control circuit at the signal output end of the long-time recording and playing module is electrically connected with the power output end of the time control circuit and the power input end of the conversion circuit; the signal output end of the conversion circuit is electrically connected with the power input end of the playing circuit and the signal input end of the detection circuit respectively, and the power output ends of the two paths of detection circuits are electrically connected with the power input ends of the plurality of light emitting diodes; the control end of the time control circuit is electrically connected with the two contacts below the next song selection key of the long-time recording and playing module respectively.

2. The pre-school children's language training device of claim 1, wherein the time control circuit comprises an electrically connected relay, a buzzer, a time control switch, a diode, a resistor, an NPN triode and a capacitor, wherein the two power output ends of the time control switch are respectively connected with the two power input ends of the first relay, one end of the buzzer is connected with the anode of the diode, the cathode of the diode is connected with the anode of the capacitor, one end of the resistor is connected with the base of the NPN triode, the other end of the resistor is connected with the collector of the NPN triode is connected with the power input end of the cathode of the second relay, the anode of the capacitor is connected with the emitter of the NPN triode and the power input end of the anode of the time control switch, and the second relay control power input end and the anode power input end of the time control switch are connected.

3. The pre-school children's language training device of claim 1, wherein the conversion circuit comprises an electret microphone, an NPN triode, a capacitor, an adjustable resistor and a resistor which are electrically connected, one end of a fourth resistor is connected with one end of the first resistor and one end of the adjustable resistor, the other end of the adjustable resistor is connected with one end of the second resistor, the other end of the second resistor is connected with one end of the capacitor and the base of the first NPN triode, the other end of the fourth resistor is connected with one end of the electret microphone and the other end of the capacitor, the other end of the first resistor is connected with one end of the third resistor and the collector of the second NPN triode, the base of the first NPN triode is connected with the other end of the third resistor, the emitter of the second NPN triode is connected with one end of the fifth resistor, and the other end of the electret microphone is connected with the emitter of the first NPN triode and the other end of the fifth resistor.

4. The pre-school children's language training device of claim 1, wherein the first path of detection circuit comprises an adjustable resistor, a resistor, an NPN triode and a relay which are electrically connected, the positive electrode of the relay is connected with the input end of a control power supply, one end of the adjustable resistor is connected with one end of the first resistor, one end of the second resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, the collector electrode of the NPN triode is connected with the input end of a power supply of the negative electrode of the relay, the normally open contact end of the relay is connected with one end of the third resistor, and the other end of the first resistor is connected with the emitter electrode of the NPN triode.

5. The device of claim 1, wherein the playing circuit comprises a music module and a speaker electrically connected, and both ends of the speaker are respectively connected with both ends of the audio output of the music module.