Automatic playing thumb musical instrument

Abstract

The invention discloses an automatic playing thumb musical instrument, and belongs to the technical field of thumb musical instruments / karmba, the automatic playing thumb musical instrument comprises a shell, an electric control system is arranged in the shell, a string piece assembly is arranged outside the shell, and an automatic playing supporting arm opposite to the string piece assembly is arranged outside the shell; the automatic playing support arm comprises a left support arm and a right support arm, and the left support arm and the right support arm are symmetrically arranged. Through the arrangement of the through hole and the cavity, the sound produced by the thumb musical instrument is more vacant, mellow, clearer and more melodious. The electronic control system and the left support arm and the right support arm which are electrically connected with the electronic control system are arranged on the thumb musical instrument, so that automatic playing of the thumb musical instrument can be realized, wonderful music of the thumb musical instrument can be heard by releasing two hands, and a beginner playing the thumb musical instrument / Karmba musical instrument is greatly helped.

Description

Technical Field

[0001] The present invention belongs to the technical field of thumb pianos / kalingba pianos, and particularly relates to an automatically-played thumb piano. Background Art

[0002] The thumb piano, also known as the kalimba, is a national musical instrument with ethnic characteristics. In different African countries, the thumb piano has different names. For example, Kalimba is what the Kenyans call this instrument, while in Zimbabwe it is called Mbira, and the Congolese call it Likembe. It also has names such as Sanza and Thumb Piano. It is mainly named because the thin slices on the body of the piano (mainly made of wood, bamboo, and also made of metal in modern development) are plucked with the thumbs. Currently, the playing process of the thumb piano / kalingba piano is all about manually pressing the string slices of different tones with both hands' thumbs for playing. There is no thumb piano / kalingba piano with automatic playing on the market, nor are there any devices or machines related to the automatic playing of the thumb piano / kalingba piano. Currently, the automatic playing devices are for large musical instruments such as pianos, and the manufacturing cost is relatively high. In order to be able to hear the wonderful music of the thumb piano / kalingba piano with both hands released, and at the same time, for beginners of the thumb piano / kalingba piano to quickly learn and master the thumb piano / kalingba piano, therefore, a desktop-level small thumb piano / kalingba piano with programmable automatic playing and playback is needed.

[0003] Publication (Announcement) Number: CN112700754B, which discloses a new type of thumb piano. In this thumb piano, the sounding reed is installed on a membrane structure or a drum skin, including the overall body of the piano and the piano support fixed on the overall body of the piano. A reed for playing music is installed on the piano support; the overall body of the piano includes a drum skin arranged on the top surface, and a general support fixed on the lower side of the drum skin for propping up the drum skin; the drum skin and the general support are fixedly connected in a closed manner to form a sound cavity with an opening downward. In the present invention, the setting of the drum skin enables the player to pluck the reed with the thumb. When the reed vibrates, the vibration of the reed drives the bottom plate and the drum skin to vibrate simultaneously, enabling the sound emitted by the thumb piano to be thick, pleasant, and louder; furthermore, when the thumb piano is held in the hand and played, the sound cavity formed between the drum skin and the general support will cause the sound waves generated when the drum skin vibrates to hit the inner wall of the sound cavity and then return to the air, allowing the sound waves to rotate in the sound cavity, forming a simulated echo state; making the sound emitted by the thumb piano more ethereal, mellow, and pleasant to listen to.

[0004] Publication (Announcement) Number: CN111261130B discloses an independently installed and adjustable double - layer thumb piano. By using an independent support mechanism and fixing mechanism, each key can be independently installed and adjusted; it is possible to use only one specification of keys or multiple specifications of keys, making the manufacturing, installation, and replacement of keys more convenient; for various scale arrangements, the playing ends of the keys can be aligned, providing a more comfortable touch; when there are noises or mute sounds, the key tension can be adjusted to solve the problem.

[0005] Publication (Announcement) Number: CN219800461U discloses a thumb piano, which includes a key rest fixedly installed on the top of the piano body, a secondary rest for fixing fixedly installed on the top of the piano body, a key bracket for clamping fixedly installed on the top of the piano body, a secondary bracket for placing fixedly installed on the top of the piano body, a wooden pillow strip for fixing fixedly installed on the top of the piano body, and keys for sounding fixedly installed on the top of the key rest. For this thumb piano, through the settings of the piano body, key rest, and wooden pillow strip, the timbre of the device can be made clearer when in use. The key rest and the wooden pillow strip are designed with wooden materials to restore the timbre, with a clean timbre and a longer sustain. The setting of the piano body makes the device more portable when in use, and a label is set on the top of the device, making the device have anti - counterfeiting performance and increasing the practicality of the device. Through the settings of the secondary rest, key bracket, and secondary bracket, the keys on the top can be made more firm.

[0006] Publication (Announcement) Number: CN215730811U discloses a thumb piano, belonging to the technical field of musical instruments. The thumb piano of the present utility model includes a resonance box and a sounding component installed on the top surface of the resonance box. The resonance box is made of plastic and includes an upper box body and a lower box body. The resonance box is provided with a number of convex ribs at the position corresponding to the sounding component on the inner wall of the top of the upper box body. The convex ribs are integrally formed with the upper box body, and the convex ribs and the lower box body are connected by ultrasonic welding. The thumb piano of the present utility model has a low manufacturing cost and a simple process. By setting the convex ribs, the vibration generated by the sounding strip can be transmitted to the lower box body of the resonance box, causing the lower box body to resonate, improving the resonance effect of the resonance box, making the sound emitted ethereal and clear. At the same time, the convex ribs can also improve the strength of the resonance box to ensure the stability of the installation of the sounding component.

[0007] Publication (Announcement) Number: CN213583068U discloses a thumb piano, which includes a piano cavity, a support component, full - tone scale elastic pieces, and half - tone scale elastic pieces; the full - tone scale elastic pieces and the half - tone scale elastic pieces together form at least one group of octave regions; the fixed ends of the full - tone scale elastic pieces are connected as a whole, and the fixed ends of the half - tone scale elastic pieces are connected as a whole, and are respectively fixed by the support components installed on the piano cavity, so that the plane where the half - tone scale elastic pieces are located is above the plane where the full - tone scale elastic pieces are located, in order to solve the problems of difficult tuning and incomplete pitch range of the thumb piano.

[0008] After retrieval, none of the above-mentioned patent documents retrieved by the applicant show a thumb piano / kalimba with an automatic playing function. Summary of the Invention

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an automatic-playing thumb piano, which solves the problems in the above-mentioned background technology.

[0010] The purpose of the present invention is achieved as follows: An automatic-playing thumb piano includes a housing. An electric control system is provided inside the housing, a string piece assembly is provided outside the housing, and an automatic-playing arm opposite to the string piece assembly is provided outside the housing. The automatic-playing arm includes a left arm and a right arm, and the left arm and the right arm are symmetrically arranged. By providing an electric control system for the thumb piano and the left arm and the right arm electrically connected to the electric control system, the automatic playing of the thumb piano can be realized, and the beautiful music of the thumb piano can be heard even with both hands released. When in use, the electric control system controls the movement of the left arm and the right arm. By pre-setting a program in the electric control system or controlling it in real time through a wireless network terminal, the left arm and the right arm can move flexibly and freely, and the movement at different positions and angles can be used to play the thumb piano music. In the present invention, the functions of the human left and right thumbs in all playing operations on the thumb piano / kalimba are replaced by the left arm and the right arm, completely releasing both hands to listen to the beautiful piano sound, enabling a more intuitive feeling of the perfect integration of machinery and music, having a more intuitive on-site visual effect, and the automatic-playing function is of great help to beginners in playing the thumb piano / kalimba.

[0011] Further, the left arm is connected to the electric control system through a left driving component; a cavity is provided at the tail end of the housing, and a left rotating shaft and a right rotating shaft are rotatably connected to the front end of the housing; the left driving component includes a left stepping motor disposed inside the cavity, the output shaft of the left stepping motor is connected to a left transmission belt, and the front end of the left transmission belt is connected to the lower end of the left rotating shaft through a left main pulley. The left stepping motor is fixedly disposed inside the cavity, the output shaft of the left stepping motor extends downward, and the output shaft of the left stepping motor is fixedly connected to a left one-pulley. A left two-vertical shaft and a left three-vertical shaft are fixedly disposed inside the housing. A left two-pulley is rotatably connected to the outside of the left two-vertical shaft, and a left three-pulley is rotatably connected to the outside of the left three-vertical shaft; the left transmission belt is sleeved outside the left one-pulley, the left two-pulley, the left three-pulley and the left main pulley. The working principle is that the electric control system controls the left stepping motor to rotate, thereby driving the left transmission belt to move, and driving the left rotating shaft to rotate through the left transmission belt to realize the rotation of the left arm.

[0012] The upper end of the left rotating shaft is fixedly connected with a left box seat. Inside the left box seat, a left brushless motor 1 and a left brushless motor 2 are fixedly arranged. The left brushless motor 1 and the left brushless motor 2 are respectively connected with a left support arm through a left speed-changing assembly 1 and a left speed-changing assembly 2. When in use, the rotation of the left rotating shaft drives the rotation of the left box seat, thereby realizing the flexible rotation of the whole left support arm.

[0013] The left speed-changing assembly 1 includes a left horizontal shaft rotatably arranged inside the left box seat. A left intermediate gear is arranged outside the left horizontal shaft. The output shaft of the left brushless motor 1 is connected with a left output shaft gear, and the left output shaft gear is meshed and connected with the left intermediate gear. The left intermediate gear is meshed and connected with a left rear drive shaft. When in use, the rotation of the left brushless motor 1 drives the rotation of the left output shaft gear connected thereto, thereby driving the rotation of the left intermediate gear and the left rear drive shaft.

[0014] The left speed-changing assembly 2 includes a left second horizontal shaft rotatably arranged inside the left box seat. A left second intermediate gear is arranged outside the left second horizontal shaft. The output shaft of the left brushless motor 2 is connected with a left second output shaft gear, and the left second output shaft gear is meshed and connected with the left second intermediate gear. The left second intermediate gear is meshed and connected with a left front drive shaft. When in use, the rotation of the left brushless motor 2 drives the rotation of the left second output shaft gear connected thereto, thereby driving the rotation of the left second intermediate gear and the left front drive shaft.

[0015] The left support arm includes an upper left connecting rod and a lower left connecting rod. The rear end of the upper left connecting rod is rotatably connected with a left auxiliary rod, and the other end of the left auxiliary rod is connected with the outer end of the left rear drive shaft. The rear end of the lower left connecting rod is connected with the outer end of the left front drive shaft. The front end of the upper left connecting rod is rotatably connected with a left playing arm. The front end of the left playing arm is detachably connected with a left contact part, and the left contact part is made of wear-resistant material. The front end of the lower left connecting rod is rotatably connected with the left playing arm. Through the rotation of the left front drive shaft and the left rear drive shaft, the movement of the lower left connecting rod and the upper left connecting rod is driven. The linkage cooperation between the lower left connecting rod and the upper left connecting rod drives the left contact part of the left playing arm to strike the string piece. After the string piece is struck, it vibrates and emits the music of the thumb piano.

[0016] Further, the right support arm and the electronic control system are connected through a right drive assembly. The right drive assembly includes a right stepper motor arranged inside the cavity. The output shaft of the right stepper motor is connected with a right transmission belt, and the front end of the right transmission belt is connected with the lower end of the right rotating shaft through a right main pulley.

[0017] The right stepping motor is fixedly arranged inside the cavity chamber. The output shaft of the right stepping motor extends downward, and a right belt pulley is fixedly connected to the output shaft of the right stepping motor. Inside the housing, a right second vertical shaft and a right third vertical shaft are fixedly arranged. A right second belt pulley is rotatably connected to the outside of the right second vertical shaft, and a right third belt pulley is rotatably connected to the outside of the right third vertical shaft. The right transmission belt is sleeved outside the right first belt pulley, right second belt pulley, right third belt pulley and right main belt pulley.

[0018] The upper end of the right rotating shaft is fixedly connected to a right box seat. Inside the right box seat, a right first brushless motor and a right second brushless motor are fixedly arranged. The right first brushless motor and the right second brushless motor are respectively connected to the right support arm through a right first speed-changing assembly and a right second speed-changing assembly. The right first speed-changing assembly includes a right first horizontal shaft rotatably arranged inside the right box seat. A right first intermediate gear is arranged on the outside of the right first horizontal shaft. The output shaft of the right first brushless motor is connected to a right first output shaft gear, and the right first output shaft gear is meshed and connected with the right first intermediate gear. The right first intermediate gear is meshed and connected with a right rear drive shaft. The right second speed-changing assembly includes a right second horizontal shaft rotatably arranged inside the right box seat. A right second intermediate gear is arranged on the outside of the right second horizontal shaft. The output shaft of the right second brushless motor is connected to a right second output shaft gear, and the right second output shaft gear is meshed and connected with the right second intermediate gear. The right second intermediate gear is meshed and connected with a right front drive shaft.

[0019] The right support arm includes an upper right connecting rod and a lower right connecting rod. The rear end of the upper right connecting rod is rotatably connected to a right auxiliary rod, and the other end of the right auxiliary rod is connected to the outer end of the right rear drive shaft. The rear end of the lower right connecting rod is connected to the outer end of the right front drive shaft. The front end of the upper right connecting rod is rotatably connected to a right playing arm. The front end of the right playing arm is detachably connected to a right contact part, and the right contact part is made of wear-resistant material. The front end of the lower right connecting rod is rotatably connected to the right playing arm.

[0020] During use, the right support arm cooperates with the left support arm. Under the program control of the electronic control system, it simulates the two thumbs of human hands, and through the perfect integration of machinery and music, it realizes the automatic playing of the thumb piano music.

[0021] Furthermore, a docking groove is arranged on the upper surface of the housing. The string piece assembly is detachably connected inside the docking groove. A through hole communicating with the docking groove is arranged on the front side wall of the housing. The string piece assembly includes a docking seat, and a cavity corresponding to the through hole is arranged at the front end of the docking seat. Through the arrangement of the through hole and the cavity, the sound emitted by the thumb piano is more ethereal, mellow, and clear and pleasant.

[0022] Further, the electronic control system includes a circuit main board disposed inside the cavity chamber. The circuit main board is electrically connected to a human-machine interaction touch screen disposed on the front side wall of the cavity chamber, and the circuit main board is electrically connected to a position sensor for real-time acquisition of the positions of the left arm and the right arm. The circuit main board uses a single-chip microcomputer controller ATmega2560, is provided with a voice recognition module, integrated with a temperature and humidity module, a Bluetooth and a wifi module, and is electrically connected to peripheral keys, output IO, a speaker, a sound pickup collector, a microphone and an SD card module. The circuit main board is communicatively connected to the human-machine interaction touch screen through 232 communication, and the circuit main board is connected to a first power supply module of 5V for power supply. The circuit main board is communicatively connected to a left motor drive and feedback module and a right motor drive and feedback module. The left motor drive and feedback module includes: A magnetic Hall sensing chip for the left front swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; B magnetic Hall sensing chip for the left rear swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; C magnetic Hall sensing chip for the left rotation execution unit motor, a motor drive chip, and a microprocessor single-chip microcomputer; and the left motor drive and feedback module motor has a left second power supply module of 9V for power supply. The left communication bus is used to collect the real-time position of the left motor and send a new position command to the left motor.

[0023] The right motor drive and feedback module includes: A magnetic Hall sensing chip for the right front swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; B magnetic Hall sensing chip for the right rear swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; C magnetic Hall sensing chip for the right rotation execution unit motor, a motor drive chip, and a microprocessor single-chip microcomputer; and the right motor drive and feedback module motor has a right second power supply module of 9V for power supply. The right communication bus is used to collect the real-time position of the right motor and send a new position command to the right motor.

[0024] The beneficial effects of the present invention: By providing an electronic control system for the thumb piano and left and right arms electrically connected to the electronic control system, the automatic playing of the thumb piano can be realized, and the hands can be released to hear the wonderful music of the thumb piano. In the present invention, the functions of the left and right thumbs of humans are replaced by the left and right arms for all playing operations on the thumb piano / kalimba, completely releasing the hands to listen to the wonderful piano sound, enabling a more intuitive feeling of the perfect integration of machinery and music, having a more intuitive on-site visual effect, and the automatic playing function is of great help to beginners of playing the thumb piano / kalimba. Through the setting of through holes and cavities, the sound emitted by the thumb piano is more ethereal, mellow, and clear and pleasant. Description of the Drawings

[0025] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the right view structural schematic diagram of the present invention; Figure 3 is the top view structural schematic diagram of the present invention; Figure 4 is the left-side perspective structural schematic diagram of the present invention; Figure 5 is the right-side perspective structural schematic diagram of the present invention; Figure 6 is the Figure 5 enlarged view of A in the present invention; Figure 7 is the bottom-up perspective structural schematic diagram of the present invention; Figure 8 is the schematic diagram of the separated state of the housing and the string piece assembly of the present invention; Figure 9 is the partial shell-removed right bottom-up perspective structural schematic diagram of the present invention; Figure 10 is the Figure 9 enlarged view of B in the present invention; Figure 11 is the partial shell-removed rear perspective structural schematic diagram of the present invention; Figure 12 is the Figure 11 enlarged view of C in the present invention; Figure 13 is the Figure 11 enlarged view of D in the present invention; Figure 14 is the circuit schematic diagram of the electric control system of the present invention; Figure 15 is the Figure 14 enlarged view of E in the present invention.

[0026] In the figure: 1 housing, 2 string piece assembly, 3 left support arm, 4 right support arm, 5 cavity chamber, 6 right rotating shaft, 7 left stepping motor, 8 left box seat, 9 upper left connecting rod, 10 lower left connecting rod, 11 left auxiliary rod, 12 left playing arm, 13 left contact part, 14 right stepping motor, 15 right transmission belt, 16 right main pulley, 17 right first pulley, 18 right second pulley, 19 right third pulley, 20 right box seat, 21 right first brushless motor, 22 right second brushless motor, 23 right second horizontal shaft, 24 right second intermediate gear, 25 right second output shaft gear, 26 right front drive shaft, 27 upper right connecting rod, 28 lower right connecting rod, 29 right auxiliary rod, 30 docking groove, 31 through hole, 32 docking seat, 33 cavity, 34 circuit main board, 35 human-computer interaction touch screen. Detailed implementation manners

[0027] The following further describes the present invention in detail with reference to the accompanying drawings. It should be noted that all the azimuth terms such as up, down, front, back, left, and right in the present invention do not limit the present invention, but are only used to more clearly illustrate and explain the present invention. Embodiment

[0028] As Figure 1-14 shown, this embodiment discloses an automatic-playing thumb piano, which includes a housing 1. An electronic control system is arranged inside the housing 1, a string piece assembly 2 is arranged outside the housing 1, and an automatic-playing arm opposite to the string piece assembly 2 is arranged outside the housing 1. The automatic-playing arm includes a left arm 3 and a right arm 4, and the left arm 3 and the right arm 4 are symmetrically arranged. By providing an electronic control system for the thumb piano and the left arm 3 and the right arm 4 electrically connected to the electronic control system, the automatic playing of the thumb piano can be realized, and the wonderful music of the thumb piano can be heard even with both hands released. When in use, the electronic control system controls the movement of the left arm 3 and the right arm 4. By pre-setting a program in the electronic control system or controlling it in real time through a wireless network terminal, the left arm 3 and the right arm 4 can move flexibly and freely, and the movement at different positions and angles can be realized to play the music of the thumb piano. In this invention, all the playing operations on the thumb piano / kalimba by the left arm 3 and the right arm 4 replacing the functions of the human left and right thumbs completely release both hands to listen to the wonderful piano sound, can more intuitively feel the perfect integration of machinery and music, have a more intuitive on-site visual effect, and the automatic-playing function is of great help to beginners in playing the thumb piano / kalimba.

[0029] In this embodiment, the left arm 3 is connected to the electronic control system through a left driving component; a cavity 5 is arranged at the tail end of the housing 1, and a left rotating shaft and a right rotating shaft 6 are rotatably connected to the front end of the housing 1; the left driving component includes a left stepping motor 7 arranged inside the cavity 5, the output shaft of the left stepping motor 7 is connected with a left transmission belt, and the front end of the left transmission belt is connected with the lower end of the left rotating shaft through a left main pulley. The left stepping motor 7 is fixedly arranged inside the cavity 5, the output shaft of the left stepping motor 7 extends downward, and the output shaft of the left stepping motor 7 is fixedly connected with a left one-way pulley. A left second vertical shaft and a left third vertical shaft are fixedly arranged inside the housing 1, a left second pulley is rotatably connected to the outside of the left second vertical shaft, and a left third pulley is rotatably connected to the outside of the left third vertical shaft; the left transmission belt is sleeved outside the left one-way pulley, the left second pulley, the left third pulley and the left main pulley. The working principle is that the electronic control system controls the rotation of the left stepping motor 7, and then drives the left transmission belt to move, and drives the left rotating shaft to rotate through the left transmission belt to realize the rotation of the left arm 3.

[0030] The upper end of the left rotating shaft is fixedly connected with a left box seat 8. A left brushless motor and a left second brushless motor are fixedly arranged inside the left box seat 8. The left brushless motor and the left second brushless motor are respectively connected to the left arm 3 through a left first speed-changing component and a left second speed-changing component; when in use, the rotation of the left rotating shaft drives the rotation of the left box seat 8, thereby realizing the flexible rotation of the whole left arm 3.

[0031] The left first speed-changing assembly includes a left first horizontal shaft rotatably arranged inside the left seat 8. A left first intermediate gear is arranged outside the left first horizontal shaft. The output shaft of the left first brushless motor is connected with a left first output shaft gear, and the left first output shaft gear is meshed and connected with the left first intermediate gear. The left first intermediate gear is meshed and connected with a left rear drive shaft. During use, the left first brushless motor rotates to drive the left first output shaft gear connected thereto to rotate, and further drives the left first intermediate gear and the left rear drive shaft to rotate.

[0032] The left second speed-changing assembly includes a left second horizontal shaft rotatably arranged inside the left seat 8. A left second intermediate gear is arranged outside the left second horizontal shaft. The output shaft of the left second brushless motor is connected with a left second output shaft gear, and the left second output shaft gear is meshed and connected with the left second intermediate gear. The left second intermediate gear is meshed and connected with a left front drive shaft. During use, the left second brushless motor rotates to drive the left second output shaft gear connected thereto to rotate, and further drives the left second intermediate gear and the left front drive shaft to rotate.

[0033] The left support arm 3 includes an upper left connecting rod 9 and a lower left connecting rod 10. The rear end of the upper left connecting rod 9 is rotatably connected with a left auxiliary rod 11, and the other end of the left auxiliary rod 11 is connected with the outer end of the left rear drive shaft. The rear end of the lower left connecting rod 10 is connected with the outer end of the left front drive shaft. The front end of the upper left connecting rod 9 is rotatably connected with a left playing arm 12. The front end of the left playing arm 12 is detachably connected with a left contact part 13, and the left contact part 13 is made of wear-resistant material. The front end of the lower left connecting rod 10 is rotatably connected with the left playing arm 12. By the rotation of the left front drive shaft and the left rear drive shaft, the movements of the lower left connecting rod 10 and the upper left connecting rod 9 are driven. The linkage cooperation between the lower left connecting rod 10 and the upper left connecting rod 9 drives the left contact part 13 of the left playing arm 12 to strike the string piece. After the string piece is struck, it vibrates and thus emits the music of the thumb piano.

[0034] In this embodiment, the right support arm 4 and the electronic control system are connected through a right drive assembly; The right drive assembly includes a right stepping motor 14 arranged inside the cavity 5. The output shaft of the right stepping motor 14 is connected with a right transmission belt 15. The front end of the right transmission belt 15 is connected with the lower end of the right rotating shaft 6 through a right main pulley 16.

[0035] The right stepping motor 14 is fixedly arranged inside the cavity chamber 5. The output shaft of the right stepping motor 14 extends downward, and a right belt pulley 17 is fixedly connected to the output shaft of the right stepping motor 14. Inside the housing 1, a right second vertical shaft and a right third vertical shaft are fixedly arranged. A right second belt pulley 18 is rotatably connected to the outside of the right second vertical shaft, and a right third belt pulley 19 is rotatably connected to the outside of the right third vertical shaft. The right transmission belt 15 is sleeved outside the right first belt pulley 17, right second belt pulley 18, right third belt pulley 19 and right main belt pulley 16.

[0036] The upper end of the right rotating shaft 6 is fixedly connected to a right box seat 20. Inside the right box seat 20, a right first brushless motor 21 and a right second brushless motor 22 are fixedly arranged. The right first brushless motor 21 and the right second brushless motor 22 are respectively connected to the right support arm 4 through a right first speed-changing assembly and a right second speed-changing assembly. The right first speed-changing assembly includes a right horizontal shaft rotatably arranged inside the right box seat 20. A right first intermediate gear is arranged outside the right horizontal shaft. The output shaft of the right first brushless motor 21 is connected to a right first output shaft gear, and the right first output shaft gear is meshed and connected with the right first intermediate gear. The right first intermediate gear is meshed and connected with a right rear drive shaft. The right second speed-changing assembly includes a right second horizontal shaft 23 rotatably arranged inside the right box seat 20. A right second intermediate gear 24 is arranged outside the right second horizontal shaft 23. The output shaft of the right second brushless motor 22 is connected to a right second output shaft gear 25, and the right second output shaft gear 25 is meshed and connected with the right second intermediate gear 24. The right second intermediate gear 24 is meshed and connected with a right front drive shaft 26.

[0037] The right support arm 4 includes an upper right connecting rod 27 and a lower right connecting rod 28. The rear end of the upper right connecting rod 27 is rotatably connected to a right auxiliary rod 29. The other end of the right auxiliary rod 29 is connected to the outer end of the right rear drive shaft. The rear end of the lower right connecting rod 28 is connected to the outer end of the right front drive shaft 26. The front end of the upper right connecting rod 27 is rotatably connected to a right playing arm. The front end of the right playing arm is detachably connected to a right contact part, and the right contact part is made of wear-resistant material. The front end of the lower right connecting rod 28 is rotatably connected to the right playing arm.

[0038] During use, the right support arm 4 cooperates with the left support arm 3. Under the program control of the electronic control system, it simulates the two thumbs of human hands and realizes the automatic playing of the thumb piano music through the perfect integration of machinery and music. Embodiment

[0039] As Figure 1-14As shown in the figure, based on Embodiment 1, a docking groove 30 is provided on the upper surface of the housing 1, and the string piece assembly 2 is detachably connected to the inside of the docking groove 30; a through hole 31 communicating with the docking groove 30 is provided on the front side wall of the housing 1. The string piece assembly 2 includes a docking seat 32, and a cavity 33 corresponding to the through hole 31 is provided at the front end of the docking seat 32. Through the arrangement of the through hole 31 and the cavity 33, the sound emitted by the thumb piano is more ethereal, mellow, and clear and pleasant. Embodiment

[0040] As Figure 1-14 As shown in the figure, based on Embodiment 2, the electronic control system includes a circuit main board 34, the circuit main board 34 is electrically connected to a human-computer interaction touch screen 35 provided on the front side wall of the cavity 5, and the circuit main board 34 is electrically connected to a position sensor for real-time collection of the positions of the left support arm 3 and the right support arm 4. The circuit main board 34 uses a single-chip microcomputer controller ATmega2560, is provided with a voice recognition module, integrated with a temperature and humidity module, a Bluetooth and a wifi module on the main board, and is electrically connected to peripheral buttons, output IO, a speaker, a pickup collector, a microphone, and an SD card module. The circuit main board 34 is communicatively connected to the human-computer interaction touch screen 35 through 232 communication, and the circuit main board 34 is connected to a first power supply module 5V for supplying power to it. The circuit main board 34 is communicatively connected to a left motor drive and feedback module and a right motor drive and feedback module. The left motor drive and feedback module includes: A magnetic Hall sensing chip for the left front swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; B magnetic Hall sensing chip for the left rear swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; C magnetic Hall sensing chip for the left rotating execution unit motor, a motor drive chip, and a microprocessor single-chip microcomputer; and the motor of the left motor drive and feedback module has a left second power supply module 9V for supplying power to it. The left communication bus is used to collect the real-time position of the left motor and send a new position command to the left motor.

[0041] The right motor drive and feedback module includes: A magnetic Hall sensing chip for the right front swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; B magnetic Hall sensing chip for the right rear swing arm, a motor drive chip, and a microprocessor single-chip microcomputer; C magnetic Hall sensing chip for the right rotating execution unit motor, a motor drive chip, and a microprocessor single-chip microcomputer; and the motor of the right motor drive and feedback module has a right second power supply module 9V for supplying power to it. The right communication bus is used to collect the real-time position of the right motor and send a new position command to the right motor.

[0042] The working principle is as follows: The main single-chip microcomputer reads the position information of each axis, gives new position data through program and calculation, and assigns it to the relative ID addresses of the six axes, so that the relative axes move to the required positions and angles to achieve mechanical movement. The main single-chip microcomputer exchanges data with the touch display screen, SD card reading circuit board, and WIFI Bluetooth module, and reads the temperature and humidity module data and clock data in real time and displays them on the touch screen, realizing human-computer interaction on the touch screen. With the cooperation of auxiliary buttons, various functions such as mechanical teaching programming can be realized.

[0043] Music programming adopts manual teaching programming. According to the data transmitted back by the magnetic angle position sensor, the current position is judged. Manually pressing the manual programming auxiliary button can input the strings to be played currently. Manually pressing the manual programming auxiliary button can input the beats of the music and adjust the beats. The basic contents displayed on the touch display screen include: 1. Year, month, and day; 2. Time; 3. Temperature; 4. Humidity; 5. Alarm clock; 6. Hourly chime; 7. Photo album display; 8. Music menu; 9. Programming interface. The touch display screen can operate multiple related functions. The hourly chime function plays the prelude notes 7, 5, 6, 2, 2, 6, 7, 5 according to the big clock chime mode, and then plays the note 2 for the number of times equal to the hour number. It has the function of synchronously playing the accompaniment with a music playing device, which is realized by connecting with an external special device through the main board interface or Bluetooth WIF module.

[0044] The fingertip material of the playing mechanical device will be worn to a certain extent after long-term work. The fingertip of this playing device is a replaceable wear-resistant material structure. The thumb piano can be programmed for automatic playing and has a detachable movable piano cover. It can operate and program the playing for various voice-overs such as double-layer and single-layer 42-tone, 41-tone, 34-tone, 24-tone, 21-tone, 18-tone, 17-tone, etc. An internal sound pickup device can amplify the playing sound and wirelessly send it to other external power amplifier and audio devices for playing the playing sound. The internal integrated Bluetooth module and WIFI module can be remotely controlled and operated and data can be downloaded through the mobile phone APP wireless network programming for the automatic playing thumb piano. Music can be downloaded or the data hardware can be updated for the thumb piano programmed for automatic playing through the computer programming interface. It integrates a voice control dialogue function for human-computer interaction, and can realize the playing and voice reporting of the mechanical arm and control the mechanical arm to play the pre-stored and network-side music.

[0045] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An automatic-playing kalimba, comprising a housing, characterized in that: An electronic control system is provided inside the housing, a string piece assembly is provided outside the housing, and an automatic playing arm opposite to the string piece assembly is provided outside the housing. The automatic playing arm includes a left arm and a right arm.

2. The automatic-playing kalimba according to claim 1, wherein: The left arm is connected to the electronic control system through a left drive assembly. A cavity is provided at the rear end of the housing, and a left rotating shaft and a right rotating shaft are rotatably connected to the front end of the housing. The left drive assembly includes a left stepper motor disposed inside the cavity. The output shaft of the left stepper motor is connected to a left transmission belt, and the front end of the left transmission belt is connected to the lower end of the left rotating shaft through a left main pulley.

3. The automatic-playing kalimba according to claim 2, wherein: The left stepper motor is fixedly disposed inside the cavity. The output shaft of the left stepper motor extends downward and is fixedly connected to a left first pulley. A left second vertical shaft and a left third vertical shaft are fixedly disposed inside the housing. A left second pulley is rotatably connected to the outside of the left second vertical shaft, and a left third pulley is rotatably connected to the outside of the left third vertical shaft. The left transmission belt is sleeved outside the left first pulley, left second pulley, left third pulley, and left main pulley.

4. The automatic-playing kalimba according to claim 3, wherein: The upper end of the left rotating shaft is fixedly connected to a left box seat. A left first brushless motor and a left second brushless motor are fixedly disposed inside the left box seat. The left first brushless motor and the left second brushless motor are respectively connected to the left arm through a left first speed change assembly and a left second speed change assembly. The left first speed change assembly includes a left first horizontal shaft rotatably disposed inside the left box seat. A left first intermediate gear is disposed outside the left first horizontal shaft. The output shaft of the left first brushless motor is connected to a left first output shaft gear, and the left first output shaft gear is meshed with the left first intermediate gear. The left first intermediate gear is meshed with a left rear drive shaft. The left second speed change assembly includes a left second horizontal shaft rotatably disposed inside the left box seat. A left second intermediate gear is disposed outside the left second horizontal shaft. The output shaft of the left second brushless motor is connected to a left second output shaft gear, and the left second output shaft gear is meshed with the left second intermediate gear. The left second intermediate gear is meshed with a left front drive shaft.

5. The automatic-playing kalimba according to claim 4, wherein: The left arm includes an upper left connecting rod and a lower left connecting rod. A left auxiliary rod is rotatably connected to the rear end of the upper left connecting rod. The other end of the left auxiliary rod is connected to the outer end of the left rear drive shaft. The rear end of the lower left connecting rod is connected to the outer end of the left front drive shaft. A left playing arm is rotatably connected to the front end of the upper left connecting rod. A left contact part is detachably connected to the front end of the left playing arm, and the left contact part is made of wear-resistant material. The front end of the lower left connecting rod is rotatably connected to the left playing arm.

6. The automatic-playing kalimba according to claim 2, wherein: The right arm is connected to the electronic control system through a right drive assembly. The right drive assembly includes a right stepper motor disposed inside the cavity. The output shaft of the right stepper motor is connected to a right transmission belt, and the front end of the right transmission belt is connected to the lower end of the right rotating shaft through a right main pulley.

7. The automatic-playing kalimba according to claim 6, wherein: The right stepper motor is fixedly arranged inside the cavity chamber. The output shaft of the right stepper motor extends downward, and a right belt pulley is fixedly connected to the output shaft of the right stepper motor. Inside the housing, a right second vertical shaft and a right third vertical shaft are fixedly arranged. A right second belt pulley is rotatably connected to the outside of the right second vertical shaft, and a right third belt pulley is rotatably connected to the outside of the right third vertical shaft. The right transmission belt is sleeved outside the right belt pulley, right second belt pulley, right third belt pulley and right main belt pulley.

8. The automatic-playing kalimba according to claim 7, wherein: The upper end of the right rotating shaft is fixedly connected with a right box seat. Inside the right box seat, a right first brushless motor and a right second brushless motor are fixedly arranged. The right first brushless motor and the right second brushless motor are respectively connected to the right support arm through a right first speed-changing assembly and a right second speed-changing assembly. The right first speed-changing assembly includes a right horizontal shaft rotatably arranged inside the right box seat. A right first intermediate gear is arranged outside the right horizontal shaft. The output shaft of the right first brushless motor is connected with a right first output shaft gear, and the right first output shaft gear meshes with the right first intermediate gear. The right first intermediate gear meshes with a right rear drive shaft. The right second speed-changing assembly includes a right second horizontal shaft rotatably arranged inside the right box seat. A right second intermediate gear is arranged outside the right second horizontal shaft. The output shaft of the right second brushless motor is connected with a right second output shaft gear, and the right second output shaft gear meshes with the right second intermediate gear. The right second intermediate gear meshes with a right front drive shaft.

9. The automatic-playing kalimba according to claim 4, wherein: The right support arm includes an upper right connecting rod and a lower right connecting rod. The rear end of the upper right connecting rod is rotatably connected with a right auxiliary rod, and the other end of the right auxiliary rod is connected to the outer end of the right rear drive shaft. The rear end of the lower right connecting rod is connected to the outer end of the right front drive shaft. The front end of the upper right connecting rod is rotatably connected with a right playing arm. The front end of the right playing arm is detachably connected with a right contact part, and the right contact part is made of wear-resistant material. The front end of the lower right connecting rod is rotatably connected with the right playing arm.

10. The automatic-playing kalimba according to claim 3, wherein: A docking groove is arranged on the upper surface of the housing. The string piece assembly is detachably connected inside the docking groove. A through hole communicating with the docking groove is arranged on the front side wall of the housing. The string piece assembly includes a docking seat, and a cavity corresponding to the through hole is arranged at the front end of the docking seat. The electronic control system includes a circuit main board arranged inside the cavity chamber, and the circuit main board is electrically connected with a human-computer interaction touch screen arranged on the front side wall of the cavity chamber.

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