CN213339621U

CN213339621U - Carinba playing auxiliary device

Info

Publication number: CN213339621U
Application number: CN202021432184.6U
Authority: CN
Inventors: 周星宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-06-01
Anticipated expiration: 2030-07-21

Abstract

The utility model discloses a karinba plays auxiliary device, including casing, circuit board, power, speaker and touch button. The shell is embedded into the clip pressing structure through the U-shaped groove. The circuit board is composed of a main microprocessor, an LED dot matrix display screen, a power management chip and a switch. The LED dot matrix display screen is used for displaying a current key to be played and a key to be played in the display screen above the keys from top to bottom like flowing water when the Carlin bar is played. The system integrates a complete human-computer interaction interface, can realize human-computer interaction of all functions without external human-computer interaction equipment such as a mobile phone, a tablet personal computer and the like, and can download and update the music library through a network. Meanwhile, the built-in programs and data can be updated through the network. It can also automatically convert music into music scores and add the converted music scores to its own music score library. It also allows scoring of playing levels.

Description

Carinba playing auxiliary device

Technical Field

The utility model relates to a musical instrument equipment technical field who is called karinba especially relates to an auxiliary device for karinba plays.

Background

Carnba (the transliteration of the English name Kalimba) is an ancient instrument from Africa, which is primarily named for thumb poking of thin pieces (mainly wooden, bamboo, and in modern developments also metal) on the body. The sounding body part of the Carlin bars is an elastic metal strip with different lengths on the upper part, and wood or cucurbita pepo is used as a resonance box on the lower part. Carlinaba is increasingly favored by young people because of its fairy, pleasant sound. However, as a musical instrument, a player usually has to have a certain knowledge of music theory to play meaningful songs, which makes it difficult for non-professional persons to master the musical instrument; even professional people frequently switch the gaze between the music score and the key when playing a song for the first time, and easily make mistakes. If the playing auxiliary device which can be arranged on the keys is provided, the player can be guided to play the corresponding notes of the music score step by step through the display screen, and the difficulty of entering the instrument of the Carinba instrument is greatly reduced.

The utility model aims at providing a karinba plays auxiliary device, its built-in a plurality of music scores can show like flowing water from the top down in the display screen of key top with the key that will play at present in the music score and the key that will play like this for the player can play whole music as long as play corresponding key down in proper order according to the key position of suggestion on the display screen, thereby reduces the study degree of difficulty of karinba.

Disclosure of Invention

The technical proposal adopted by the utility model is as follows: a karinba playing auxiliary device comprises a shell, a circuit board, a power supply, a loudspeaker and touch keys.

The bottom of the shell is provided with a U-shaped groove seen from the side, and the playing auxiliary device of the Carinba is embedded into the pressing structure of the Carinba elastic sheet through the U-shaped groove on the shell. The arrangement of the U-shaped groove enables the Carlin bar playing auxiliary device to be conveniently installed on the Carlin bar and can be quickly detached from the Carlin bar, and meanwhile, the performance and the structure of the Carlin bar are not affected.

The circuit board consists of a microprocessor and necessary peripheral capacitance resistance inductance elements thereof, an LED dot matrix display screen, an LED driver, an OLED display screen, a microphone, an audio amplifier, a power management chip and a power switch.

The microprocessor is a single-chip wireless system on chip (SoC) integrated with Wi-Fi and has the capability of connecting the Internet through a WIFI wireless local area network, so that the Carinba playing auxiliary device has the capability of updating built-in programs, data and a music library through a network.

The power supply is 2 AAA dry batteries or a lithium battery, and one of the AAA dry batteries or the lithium battery can be selected according to the requirement.

The LED dot matrix display screen is used for playing auxiliary prompts of the Carinba.

And the LED driver is used for driving the LED dot matrix display screen.

The OLED display screen is used for displaying man-machine interaction interfaces such as menu options, songs and states.

The audio amplifier and the loudspeaker are used for playing music corresponding to the music score, so that a player can know how the music score should be played before playing so as to be used as reference.

The touch key is used for performing human-computer interaction, so that the Carinba playing auxiliary device can realize the human-computer interaction of all functions without external human-computer interaction equipment such as a mobile phone, a tablet personal computer and the like.

The microphone is used for identifying and feeding back played sound, so that the Carinba playing auxiliary device has the advanced functions of performing tone calibration on the Carinba, scoring played songs or automatically converting music into music scores.

The power management chip is used for converting unstable voltage of the battery into stable 3.3V voltage for other circuits such as a microprocessor and the like.

The power switch key is a main power switch of the Carinba playing auxiliary device.

The utility model discloses possess following outstanding innovation point: 1. the Carinba playing auxiliary device integrates a complete human-computer interaction interface, can finish human-computer interaction operation of all functions by independent use, and is not required to be connected with external human-computer interaction equipment (such as a mobile phone, a tablet personal computer and the like) through a wireless communication module, so that the cost is reduced, and the use convenience is improved.

2. This karinba playing auxiliary device has used dot matrix LED display screen, can show the note that will play at present and a plurality of single symbol that will play in same screen, and these notes can be like flowing water like time rhythm from last down removal for the player can have a prejudgement to the note that will play, thereby improves the rate of accuracy of playing and reduces the degree of difficulty.

3. This auxiliary device is played to kalinba uses the U-shaped groove to install on the shell fragment of kalinba pushes down the structure, need not to do any change to the structure of kalinba self and can firmly be even as an organic whole with kalinba, and when need not use this auxiliary device is played to kalinba with it toward the side one smooth can conveniently follow the kalinba and lift off.

4. The Carinba playing auxiliary device can download and update the music score library through the network, so that the available music scores are not limited to the number of the built-in limited music scores when leaving a factory any more, and the coverage range of the music scores is greatly improved. Meanwhile, the built-in program, data and the like can be updated through the network, so that the built-in program can be continuously upgraded.

5. The Carinba playing auxiliary device can automatically convert music into music scores and add the converted music scores into a music score library of the device.

6. The Carinba playing auxiliary device can also score the playing level of a player.

Drawings

Fig. 1 is a perspective view of a kaliban structure.

Fig. 2 is a perspective view and a right side view of the present karinba playing aid.

Fig. 3 is a perspective view and a right side view of the present karinba playing aid mounted on the karinba.

Fig. 4, 5, and 6 are illustrations of the pipeline note-on.

Fig. 7 is a circuit system block diagram of the present karinba playing assisting device.

Fig. 8 is a schematic circuit diagram of the present karinba playing assisting device.

Fig. 9 is a flowchart of the internal program of the microprocessor of the karinba playing assisting device.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the described technical solution is not the only embodiment of the present invention, and all other embodiments obtained by the embodiments of the present invention without any creative work by those skilled in the art belong to the protection scope of the present invention.

As shown in fig. 1, the kalinba is generally composed of a body 1, keys 2,

key supports

3 and 6, a key depression structure 4, key pillows 5, and sound holes 7.

The appearance structure of the karinba playing assisting device is shown in fig. 2 and comprises an OLED display screen 7, a touch key 8, an LED dot matrix display screen 9, a shell 10 and a U-shaped groove 11 on the shell.

Fig. 3 shows how the present kalinba playing aid embodiment is mounted and fixed to the key depression structure 4 of kalinba through the U-shaped groove 11 of the casing.

Fig. 4, 5 and 6 illustrate the concept of the pipeline note-cue. The LED dot matrix display screen is used for prompting that a music score needs to be played and a plurality of notes need to be played currently, the LED in the bottom line indicates the key positions corresponding to the notes needing to be played currently, and the key positions corresponding to the notes needing to be played are displayed upwards in sequence. And after the current musical note is played, all the musical notes indicated on the LED dot matrix display screen are shifted down by one line, the first musical note to be played originally is changed into the current musical note to be played, and the steps are repeated until all the musical notes of the music score are played. For example, when 7 notes "1", "2", "3", "4", "5", "6" and "7" are played in sequence, the first row of the LED dot matrix display from the bottom of fig. 4 indicates that the current note to be played is "1", the second row indicates that the first note to be played is "2", the third row indicates that the second note to be played is "3", and so on … …. When the note "1" is played, the content displayed on the LED dot matrix display screen moves down one line as a whole, as shown in fig. 5, the current note to be played becomes "2", the second line indicates that the first note to be played is "3", the third line indicates that the second note to be played is "4", and so on … …. When the note "2" is played, the content displayed on the LED dot matrix display screen moves down one row again, as shown in fig. 6, the current note to be played changes to "3", the second row indicates that the first note to be played is "4", the third row indicates that the second note to be played is "5", and so on … …, and so on, until the last note "7" is played. This is the concept of the stream note cue.

Fig. 7 shows a circuit system block diagram of the present karinba playing assisting device embodiment. The circuit system of the embodiment comprises a power supply, a power switch, a power management chip, a microprocessor, an LED driver, an LED dot matrix display screen, an OLED display screen, a microphone, an audio amplifier, a loudspeaker and a touch key. The specific implementation of the present embodiment will be described in detail below with reference to the schematic circuit diagram shown in fig. 8.

In this embodiment, a single-chip wireless system on a chip (SoC) ESP32 is selected as the microprocessor, and a high-performance RISC core, an I2C interface, an SPI interface, a touch key interface, an analog-to-digital converter ADC, a digital-to-analog converter DAC, and other rich peripherals, a WIFI wireless network, and a FLASH memory are integrated therein.

In fig. 8, the battery is used as the power source of the present embodiment, and the positive electrode of the battery is connected to pins 5 and 8 of the power management chip SR1545, and the negative electrode of the battery is connected to pins 3, 9, and 11 of SR 1545. The ON/OFF terminals of the power switch are connected to the enable pin EN (pin 6) of SR1545 and the positive electrode of the battery, respectively. When the power switch is pressed ON/OFF, the power management chip SR1545 starts operating, stabilizing the unstable battery voltage to 3.3V together with the inductor L1, the capacitors C2, C3, and the resistors R1, R2. Wherein, R1 and R2 are output voltage feedback divider resistors and are used for setting the magnitude of the output voltage. The output voltage is set to 3.3V in this example. C2 is input decoupling capacitance, C3 is output filter capacitance, and L1 is Buck-Boost inductance. The 3.3V voltage output from the power management chip is connected to the EN pin and the 3V3 pin of the microprocessor ESP32, the VDD and VCOMH pins of the OLED display, the VCC pin of the LED driver chip XM1232, the microphone MIC1 and VDD pins, and the VCC pin of the audio amplifier DP1325 as the operating power sources of these components. The microprocessor is used as a master controller of the circuit system, and all logic functions of the circuit system are realized through internal programs. C1 is the decoupling capacitance of microprocessor ESP 32. The OUT output pin of the microphone MIC1 is connected to the IO35 pin of the microprocessor ESP 32. In the ESP32 internal program, the IO35 pin is correspondingly configured as the input pin of the ADC of the ESP32 internal analog-to-digital converter, so that after the microphone converts the sound signal into a voltage signal, the ESP32 samples the voltage signal through its internal ADC, converts the voltage signal into a digital signal, and stores the digital signal in its internal RAM memory for further processing by the internal program. The OLED display screen is connected to the I2C bus of ESP32 through SCL and SDA pins, so programs inside ESP32 can control what is displayed on the OLED through the I2C bus. C5 is the decoupling capacitance of OLED display screen, R5 is the brightness adjusting resistance of OLED, and changing the resistance of R5 can change the display brightness of OLED display screen. ROW0-ROWn and COM0-COM8 pins of the LED driver XM1232 are connected to ROW0-ROWn and COM0-COM8 pins of the LED dot-matrix display screen, respectively, so as to drive the LED dot-matrix display screen. The LED driver XM1232 is connected to the I2C bus of ESP32 through SCL and SDA pins as is the OLED, where R3 and R4 are the pull-up resistors of the I2C bus. C6 is the decoupling capacitance of LED driver XM 1232. Digital sound signals generated by an internal program of the ESP32 are converted into analog voltage signals by an internal digital-to-analog converter DAC1, and then output through an IO25 pin, and are coupled to a non-inverting input terminal INP of an audio amplifier DP1325 through a capacitor C8 and a resistor R6, and are amplified by the audio amplifier DP1325, and then push a speaker LS1 to sound through a low-pass filter network composed of inductors L2 and L3 and capacitors C7 and C10. Wherein, C9 and R7 are inverting input coupling capacitance resistors of the audio amplifier, and C11 is decoupling capacitance of the audio amplifier. TPAD1 and TPAD2 are touch keys connected to capacitive touch input pins IO15, IO16, IO17 and IO18 of ESP32 through network numbers T1, T, T3 and T4, respectively.

Fig. 9 shows a flowchart of the built-in program of the microprocessor according to the embodiment. When the power switch is pressed, the microprocessor is powered on and reset, and the hardware initialization process is started. And after hardware initialization is finished, the OLED display screen displays man-machine interaction operation menu options and starts to detect whether the touch key is pressed down. And if the corresponding touch key is detected to be pressed, moving a menu cursor to select a corresponding option.

If the option of selecting the music score is selected, the menu enters a music score selection submenu, and after the user selects the corresponding music score through the touch keys, the LED dot matrix display screen starts to display the note prompt corresponding to the music score. And meanwhile, the microphone starts to work, after the microprocessor detects that the current musical note is played down through the microphone, the display content of the LED dot matrix display screen is updated and moved down by one line, if the song playing is finished, the program returns to a main menu option interface, otherwise, whether the current musical note is played down is continuously detected, and if the current musical note is played down, the display content of the LED dot matrix display screen is updated and moved down by one line until the song playing is finished. And after the song is played, prompting whether to score the playing level, if so, scoring and displaying the score, and then returning to the main menu option interface, otherwise, directly returning to the main menu option interface.

If the option of 'downloading and updating the music score library through the wireless network' is selected, the program downloads and updates the music score library and then returns to the main menu interface.

If the option of 'downloading and updating the built-in program through the wireless network' is selected, the program downloads and updates the built-in program of the microprocessor, and then returns to the main menu interface.

If the option of 'converting music into music score' is selected, the program records the music by a microphone and runs a music score conversion program, and after the conversion is finished, the new music score is stored in a music score library and then returns to the main menu interface.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a karinba plays auxiliary device which characterized by: the loudspeaker comprises a shell, a circuit board, a power supply, a loudspeaker and a touch key; the shell is embedded into the clip pressing structure through the U-shaped groove; the circuit board consists of a microprocessor and necessary peripheral capacitance resistance inductance elements thereof, an LED dot matrix display screen, a power management chip and a power switch; the LED dot matrix display screen is used for displaying keys corresponding to current musical notes to be played in a music score and keys corresponding to the musical notes to be played in the display screen above the keys from top to bottom like flowing water when the Carlin bar is played.

2. The karinba playing aid according to claim 1, wherein: the circuit board and the elements connected with the circuit board also comprise an OLED display screen, a microphone, an audio amplifier and a loudspeaker connected to the audio amplifier; the signal output end of the microphone is connected to the input end of an analog-digital converter (ADC) arranged in the microprocessor, and a sound signal is converted into a digital signal through the ADC and then is stored in a RAM in the microprocessor for program use.

3. The karnba playing assisting device according to claim 1, which is characterized in that the device has a complete human-computer interaction interface, and can complete human-computer interaction of all functions without being connected with external human-computer interaction equipment in a wired or wireless communication mode.