CN115171473A

CN115171473A - National music teaching device

Info

Publication number: CN115171473A
Application number: CN202210894821.9A
Authority: CN
Inventors: 张倩; 于晓楠; 焦健; 程静静
Original assignee: Shandong University Of Arts
Current assignee: Shandong University Of Arts
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-10-11

Abstract

The invention discloses a national music teaching device, which comprises a base, wherein four trundles are fixedly connected to the base, a supporting seat is fixedly connected to the right end of the base, a motor is fixedly connected to the supporting seat, a transmission shaft is rotatably connected to the left end of the motor, a cam is fixedly connected to the other end of the transmission shaft, the left end of the cam is movably connected with a box body, a transmission mechanism is slidably connected to the inner wall of the box body, a page turning mechanism is arranged below the transmission mechanism to realize automatic page turning, so that the condition that a student manually turns the page turning beat feeling in an interrupted manner and needs to spend time again to find the beat is avoided, a music score visual angle adjusting mechanism is arranged above the transmission mechanism to relieve fatigue of the student caused by keeping the same reading posture for a long time, the student is helped to continuously concentrate attention on learning, the cervical vertebra and eyes of the student are protected, and beat is automatically performed through the beat mechanism arranged on the base, so that the student can conveniently and quickly master.

Description

National music teaching device

Technical Field

The invention belongs to the technical field related to music teaching, and particularly relates to a national music teaching device.

Background

In national music teaching, music theory knowledge is firstly learned, and after students understand note values and meanings of various notes, the students are subjected to rhythm and musical instrument teaching. The beat is the basic unit of music in which time is divided into equal parts, and each unit is called a "beat" or a beat. The duration of the beat is represented by the duration of the notes, and the duration of one beat can be a quarter note (i.e., the quarter note is taken as one beat), a half note (i.e., the half note is taken as one beat), or an eighth note (i.e., the eighth note is taken as one beat). In the teaching process, the beat teaching is one of the most important basic teaching courses, and in long-time musical instrument practice, students need to be familiar with beats continuously according to a music score and play the music on the music score for multiple times according to the beats so as to achieve the degree of skillful mastering.

Patent CN201811431936.4 discloses a formula metronome is stepped on with foot to music teaching, including base, fixed frame, installation sleeve, group battery, servo motor, music stand and control panel, the embedded hydraulic stem that installs of lower surface of base, and hydraulic stem's below is fixed with the truckle, base internally mounted has the guide post, fixed frame's inner wall is fixed with the tooth piece, the lower surface mounting of running-board has the folding rod, the embedded pressure cylinder of installing on the inside right side of base, the surface of safety catch is provided with the handle, the below fixed mounting of installation sleeve has the stopper, and the top of inserting a section of thick bamboo is fixed with the loop bar. This music teaching device is with foot formula metronome of stepping on, fixed frame reciprocates for student's step is regular inching all the time, helps the student to form stable bat, thereby the student is original bat according to the bat of underfoot, carries out exact the strike to the note on the music book.

The device needs the student to beat the grasp of beat, can not provide good teaching effect to beginner or to the student that beat the lower degree of familiarity with the beat, and when other students that have certain basis study, even the student beats the beat also can't be made mistakes, be unfavorable for the student to the study of national music, national music teaching needs long-time reading in addition, the device is when practicing the music to the student, need manually turn over the page, thereby interrupt the sensation that the student keeps the beat, it is great to the teaching quality influence, keep the same reading posture for a long time simultaneously and easily increase student's tired sense and make its attention can't concentrate on thereby reduce teaching effect, and have the harm to student's health.

Disclosure of Invention

The invention aims to provide a national music teaching device and a national music teaching method, wherein a beat mechanism is arranged for automatic beat, a page turning mechanism is arranged for automatic page turning, a music score visual angle adjusting mechanism is used for adjusting the height and the angle of a music score, and a transmission mechanism is used for linking the functions, so that the problems in the background art are solved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a national music teaching device, includes the base, four truckles of base lower surface four corners symmetry fixedly connected with, surface right-hand member fixedly connected with supporting seat on the base, fixed surface is connected with the motor on the supporting seat, the motor left end is rotated and is connected with the transmission shaft, transmission shaft other end fixedly connected with cam, cam left end swing joint has box, its characterized in that: the utility model discloses a music book box, including box inner wall sliding connection, box inner wall sliding connection has drive mechanism, drive mechanism includes the lifter, the lifter right side is equipped with the driving gear, the driving gear other end is equipped with first driven gear and second driven gear, the drive mechanism below is equipped with turns over page or leaf mechanism, the drive mechanism top is equipped with music book visual angle adjustment mechanism, music book visual angle adjustment mechanism top is equipped with the music stand, base upper surface middle part is equipped with beat mechanism.

Preferably, the right side of the lifting rod is fixedly connected with a transmission pin, the outer ring at the other end of the transmission pin is rotatably sleeved with a first rotating groove, the other end of the first rotating groove is rotatably connected with a pin shaft, the other end of the pin shaft is rotatably connected with a second rotating groove, the other end of the second rotating groove is fixedly connected with a rotating shaft, the other end of the rotating shaft is fixedly connected with the driving gear, the driving gear is vertically meshed with the first driven gear and the second driven gear respectively, and the first driven gear and the second driven gear are symmetrically distributed on the upper side and the lower side of the driving gear. The lifter left side with box inner wall sliding connection, the lifter lower extreme all the time with the cam is tangent, the pivot right-hand member with the box rotates and connects, the cam drives when the lifter is once ascending or descending motion, the pivot is in the round is rotated under the drive in first rotating groove and second rotating groove.

Preferably, the page turning mechanism comprises a base, a limiting shaft is fixedly connected to the upper surface of the right side of the base, the other end of the limiting shaft is rotatably connected with a limiting pin, a swinging rod is fixedly connected to the right end of the limiting pin, a sliding sleeve is slidably connected to the outer ring of the swinging rod, a driven groove is rotatably connected to the upper end of the sliding sleeve, a transmission rod is rotatably connected to the other end of the driven groove, a connecting block is fixedly connected to the right end of the swinging rod, a connecting rod is fixedly connected to the upper end of the connecting block, and a magnet is fixedly connected to the top of the connecting rod. The base right-hand member with the box inner wall rotates to be connected, the transfer line top with first driven gear fixed connection, first driven gear is in when the driving gear drives down the rotation round, the swinging arms swings to the music book left end from initial position music book right-hand member and replies the initial position again.

Preferably, music book visual angle adjustment mechanism includes the bracing piece, bracing piece left end fixedly connected with first movable post, bracing piece right-hand member fixedly connected with second movable post, second driven gear upper end fixedly connected with screw thread driven shaft, screw thread driven shaft top threaded connection has the thread bush, the thread bush top is rotated and is connected with third movable post. First movable column and second movable column symmetric distribution are in music stand lower surface rear side both ends, third movable column fixed connection is in music stand lower surface front side middle part, when the lifter is ascending or descending motion, the music stand is in the first movable column is ascending or descending motion under the drive of second movable column, at this in-process the third movable column is in adjust under the driven gear rotation of second the contained angle of music stand and horizontal plane.

Preferably, the beat mechanism includes the sheave, the sheave below is equipped with the connecting plate, connecting plate lower surface left end fixedly connected with spring, the spring other end with base fixed connection, the connecting plate side rotates and is connected with the support column, the support column other end with base fixed connection, connecting plate upper surface right-hand member fixedly connected with hammering, the hammering top is equipped with the sound wood, the sound wood bottom with base fixed connection. The grooved wheel is fixedly sleeved with the transmission shaft, the connecting plate is pressed down when the top of the grooved wheel rotates to the lowest end, the hammer collides with the sound wood, and the spring pushes the connecting plate to separate the hammer from the sound wood when the bottom of the grooved wheel rotates to the lowest end.

The teaching method comprises the steps that the device is moved to a proper position through the caster wheel, a music score with a magnet block is placed on the upper surface of the music stand, the magnet is attached to the magnet block on the music score, and the music score is divided into pages according to the number of beats made by the grooved pulley rotating for a half circle, so that the number of beats made by the grooved pulley rotating for a half circle is consistent with the number of beats of one page of the music score;

when a student starts to read the music book and practises the music book for teaching, the motor drives the beat mechanism to beat to assist the student in mastering the beat, and the beat mechanism is convenient to perceive when the beat of the student makes mistakes;

after a student finishes exercising a page of music score, the motor drives the cam to rotate for half a circle, so that the music score visual angle adjusting mechanism drives the music stand to do one-time ascending or descending motion, in the process, the third movable column automatically adjusts an included angle between the music stand and the horizontal direction, and the music stand is always in a comfortable observation visual angle of the student when ascending and descending;

after a student exercises to finish a page of music book, the motor drives the cam to rotate for a half circle, so that the transmission mechanism drives the page turning mechanism to finish a page turning;

through the steps, when students finish one page of music book after exercising, the device automatically turns pages once, adjusts the visual angle of the music book and beats according to the music book until finishing the national music teaching and closing the motor.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention automatically beats according to the music book through the beat mechanism, thereby facilitating students to quickly master beats for playing, and meanwhile, when the students play according to standard beats, the students are easy to judge the place where errors occur, thereby improving the speed of the students for mastering teaching contents.

2. The invention realizes automatic page turning through the page turning mechanism, and students can automatically turn pages into the next music book without any operation after practicing one music book, thereby avoiding that the students need to spend time again to find the beats because the manual page turning interrupts the beat feeling.

3. According to the music book visual angle adjusting mechanism, after a student practices a music book, the music book stand automatically goes up and down and adjusts the angle, so that the fatigue of the student caused by keeping the same music book reading posture for a long time is relieved, the student is helped to continuously concentrate on the attention to learn, and the cervical vertebra and eyes of the student are protected.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a front view of the internal structure of the present invention;

FIG. 4 is a left side view of the internal structure of the present invention;

FIG. 5 is a schematic view of the overall structure of the transmission mechanism of the present invention;

FIG. 6 is a front elevational view of the page turning mechanism of the present invention;

FIG. 7 is a schematic structural view of a page turning mechanism of the present invention;

FIG. 8 is a schematic structural diagram of a music score viewing angle adjustment mechanism according to the present invention;

fig. 9 is a left side view of the metronome of the present invention;

FIG. 10 is a front view of the present invention in a state where the page of the score is turned and the viewing angle is adjusted;

fig. 11 is a left side view of the metronome mechanism of the present invention in a striking beat state;

in the figure: 1. a base; 2. a caster wheel; 3. a supporting seat; 4. a motor; 5. a cam; 6. a drive shaft; 7. a music stand; 8. a box body; 100. a transmission mechanism; 101. a lifting rod; 102. a drive pin; 103. a first rotating groove; 104. a pin shaft; 105. a second rotating groove; 106. a rotating shaft; 107. a driving gear; 108. a first driven gear; 109. a second driven gear; 200. a page turning mechanism; 201. a base; 202. a limiting shaft; 203. a limit pin; 204. a swing lever; 205. a sliding sleeve; 206. a driven groove; 207. a transmission rod; 208. connecting blocks; 209. a connecting rod; 210. a magnet; 300. a music score visual angle adjusting mechanism; 301. a support bar; 302. a first movable column; 303. a second movable column; 304. a third movable column; 305. a threaded sleeve; 306. a threaded driven shaft; 400. a beat mechanism; 401. a sheave; 402. a connecting plate; 403. a support column; 404. a spring; 405. a hammer; 406. and (5) sounding wood.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

The existing device beats by oneself through the student to the assurance of beat, learns comparatively difficultly to the beginner, can't discover the mistake and go out where, and the student needs the manual page turning simultaneously, and extremely inconvenient and can disturb student's beat keeps the same posture in addition for a long time to read the register for easy increase student thereby tired out and feel reduces attention concentration degree and has the damage to student's cervical vertebra and eyes.

Referring to fig. 1 to 11, the present invention provides a technical solution: the utility model provides a national music teaching device, as shown in fig. 1 to 4, including base 1, four truckles 2 of base 1 lower surface four corners symmetry fixedly connected with are convenient for the device to remove, base 1 upper surface right end fixedly connected with supporting seat 3, fixed surface is connected with motor 4 on the supporting

seat

3, 4 left ends of motor rotate and are connected with

transmission shaft

6, 6 other end fixedly connected with cams 5 of transmission shaft, 5 left end swing joint of cam has box 8, 8 inner wall sliding connection of box has drive mechanism 100, drive mechanism 100 includes lifter 101, lifter 101 right side is equipped with driving gear 107, the driving gear 107 other end is equipped with first driven gear 108 and second driven gear 109, drive mechanism 100 below is equipped with page turning mechanism 200, drive mechanism 100 top is equipped with music book visual angle adjustment mechanism 300, music book visual angle adjustment mechanism 300 top is equipped with music book frame 7, base 1 upper surface middle part is equipped with beat mechanism 400.

In order to realize linkage of the functions of the device, as shown in fig. 5, a transmission pin 102 is fixedly connected to the right side of the lifting rod 101, a first rotation groove 103 is rotatably sleeved on the outer ring of the other end of the transmission pin 102, a pin shaft 104 is rotatably connected to the other end of the first rotation groove 103, a second rotation groove 105 is rotatably connected to the other end of the pin shaft 104, a rotation shaft 106 is fixedly connected to the other end of the second rotation groove 105, the other end of the rotation shaft 106 is fixedly connected to a driving gear 107, the driving gear 107 is vertically engaged with a first driven gear 108 and a second driven gear 109 respectively, the first driven gear 108 and the second driven gear 109 are symmetrically distributed on the upper side and the lower side of the driving gear 107, the first driven gear 108 drives the page turning mechanism 200 to work, and the second driven gear 109 drives the music score visual angle adjusting mechanism 300 to work. The left side of the lifting rod 101 is connected with the inner wall of the box body 8 in a sliding mode, the lower end of the lifting rod 101 is tangent to the cam 5 all the time, the right end of the rotating shaft 106 is connected with the box body 8 in a rotating mode, and when the cam 5 drives the lifting rod 101 to do ascending or descending motion for one time, the rotating shaft 106 rotates for one circle under the driving of the first rotating groove 103 and the second rotating groove 105.

In order to realize automatic page turning according to music scores, as shown in fig. 6 to 7, the page turning mechanism 200 comprises a base 201, a limiting shaft 202 is fixedly connected to the upper surface of the right side of the base 201, a limiting pin 203 is rotatably connected to the other end of the limiting shaft 202, a swinging rod 204 is fixedly connected to the right end of the limiting pin 203, a sliding sleeve 205 is slidably connected to the outer ring of the swinging rod 204, a driven groove 206 is rotatably connected to the upper end of the sliding sleeve 205, a transmission rod 207 is rotatably connected to the other end of the driven groove 206, a connecting block 208 is fixedly connected to the right end of the swinging rod 204, a connecting rod 209 is fixedly connected to the upper end of the connecting block 208, and a magnet 210 is fixedly connected to the top of the connecting rod 209. The right end of the base 201 is rotatably connected with the inner wall of the box 8, the top end of the transmission rod 207 is fixedly connected with the first driven gear 108, when the first driven gear 108 rotates for a circle under the driving of the driving gear 107, the swinging rod 204 swings from the right end of the music score at the initial position to the left end of the music score and returns to the initial position again, and one-time page turning is realized.

In order to realize the timing adjustment of the height and the angle of the music score, as shown in fig. 8, the music score visual angle adjusting mechanism 300 includes a supporting rod 301, a first movable column 302 is fixedly connected to the left end of the supporting rod 301, a second movable column 303 is fixedly connected to the right end of the supporting rod 301, a threaded driven shaft 306 is fixedly connected to the upper end of the second driven gear 109, a threaded sleeve 305 is connected to the upper portion of the threaded driven shaft 306 in a threaded manner, and a third movable column 304 is rotatably connected to the upper portion of the threaded sleeve 305. First movable post 302 and second movable post 303 symmetric distribution are at music stand 7 lower surface rear side both ends, and third movable post 304 fixed connection is in music stand 7 lower surface front side middle part, and when lifter 101 was done and is risen or descending motion, music stand 7 was done and is risen or descending motion under first movable post 302 and the drive of second movable post 303, and third movable post 304 adjusts the contained angle of music stand 7 and horizontal plane under the rotation of second driven gear 109 in this process, makes the music book be in the comparatively comfortable observation visual angle of student all the time in the lift.

In order to realize automatic beating, as shown in fig. 9, the beating mechanism 400 includes a sheave 401, a connecting plate 402 is arranged below the sheave 401, a spring 404 is fixedly connected to the left end of the lower surface of the connecting plate 402, the other end of the spring 404 is fixedly connected to the base 1, a supporting column 403 is rotatably connected to the side surface of the connecting plate 402, the other end of the supporting column 403 is fixedly connected to the base 1, a hammer 405 is fixedly connected to the right end of the upper surface of the connecting plate 402, a sound wood 406 is arranged above the hammer 405, and the bottom end of the sound wood 406 is fixedly connected to the base 1. The grooved pulley 401 and the transmission shaft 6 are fixedly sleeved, the connecting plate 402 is pressed down when the top of the grooved pulley 401 rotates to the lowest end, the hammer 405 collides with the sound wood 406, one-time beating is achieved, and when the bottom of the grooved pulley 401 rotates to the lowest end, the spring 404 pushes the connecting plate 402, and the hammer 405 is separated from the sound wood 406.

When the music book turning device is used, the device is moved to a proper position by the trundles 2 fixedly connected to the lower surface of the base 1, a multi-page music book with a magnet block at the lower left corner is placed on the upper surface of the music book rack 7, the magnet 210 in the page turning mechanism 200 is attached to the magnet block on the music book, the music book is divided into pages according to the number of beats made by the half-circle rotation of the grooved pulley 401, the number of beats made by the half-circle rotation of the grooved pulley 401 is consistent with the number of beats made by one page of the music book, and the preparation work before teaching is completed.

When a student starts to read a music book and practises the music book for teaching, the motor 4 fixedly connected to the supporting seat 3 drives the transmission shaft 6 rotatably connected with the motor 4 to rotate, the grooved wheel 401 rotates along with the grooved wheel, when the top of the grooved wheel 401 rotates to the lowest end, the left end of the connecting plate 402 is pressed down, the spring 404 fixedly connected to the left end of the lower surface of the connecting plate 402 is compressed, the hammer 405 fixedly connected to the right end of the connecting plate 402 is made to pop up and collide with the sound wood 406 fixedly connected to the base 1 to make a sound, then when the sound wood 406 continuously rotates to enable the bottom of the groove to rotate to the lowest end, the spring 404 in the compressed state pushes the connecting plate 402 to pop up, the hammer 405 is separated from the sound wood 406 to finish one beat, and after the grooved wheel 401 rotates for a half circle, the beat number contained in the page of the music book is beaten by the beat mechanism 400, so that the student practises the music book in the correct beat, helps the student master the teaching content as soon as possible, and is convenient to perceive the beat error of the student.

After a student finishes exercising a page of music score, the motor 4 drives the cam 5 fixedly connected to the left end of the transmission shaft 6 to rotate for half a turn, so that the lifting rod 101 slidably connected to the inner wall of the box 8 makes a lifting or lowering motion, the lifting rod 101 makes a lifting or lowering motion to drive the first rotating groove 103 rotatably connected thereto to rotate through the transmission pin 102, the first rotating groove 103 drives the second rotating groove 105 to rotate through the pin 104, so that the rotating shaft 106 rotates for one turn, the lifting motion of the lifting rod 101 is converted into a circular motion of the rotating shaft 106, the rotating shaft 106 rotates to drive the driving gear 107 fixedly connected thereto to rotate for one turn, so that the first driven gear 108 and the second driven gear 109 vertically meshed with the driving gear 107 rotate for one turn, the rotation of the first driven gear 108 drives the driven groove 206 to rotate through the transmission rod 207, the sliding sleeve 205 rotatably connected with the driven groove 206 slides on the swinging rod 204, the swinging rod 204 is limited by the limiting pin 203 and the limiting shaft 202, the swinging rod 204 swings with the swinging rod 204 during the sliding process that the first driven gear 108 rotates to convert into a page of music score to be connected to the top end of the magnet 209 fixedly connected to the sliding sleeve 204, and the magnet 209 swings for one turn.

The lifting rod 101 is driven to lift the first movable column 302 and the second movable column 303 through the supporting rod 301 fixedly connected with the lifting rod 101, the second driven gear 109 rotates to drive the threaded driven shaft 306 fixedly connected with the second driven gear to rotate, and the threaded sleeve 305 in threaded connection with the threaded driven shaft 306 rotates to lift or descend, so that the third movable column 304 rotatably connected with the threaded sleeve 305 is lifted or descended once. Through the steps, the device automatically turns pages once when students complete one page of music book after practice, adjusts the visual angle of the music book and beats according to the music book until the national music teaching is completed, and the motor 4 is turned off.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a national music teaching device, includes base (1), four truckles (2) of base (1) lower surface four corners symmetry fixedly connected with, base (1) upper surface right end fixedly connected with supporting seat (3), its characterized in that: fixed surface is connected with motor (4) on supporting seat (3), motor (4) left end is rotated and is connected with transmission shaft (6), transmission shaft (6) other end fixedly connected with cam (5), cam (5) left end swing joint has box (8), base (1) upper surface middle part is equipped with beat mechanism (400).

2. The national music teaching device according to claim 1, wherein: the utility model discloses a music book box, including box (8), inner wall sliding connection has drive mechanism (100), drive mechanism (100) include lifter (101), lifter (101) right side is equipped with driving gear (107), driving gear (107) other end is equipped with first driven gear (108) and second driven gear (109), drive mechanism (100) below is equipped with page turning mechanism (200), drive mechanism (100) top is equipped with music book visual angle adjustment mechanism (300), music book visual angle adjustment mechanism (300) top is equipped with music book frame (7).

3. The national music teaching device according to claim 2, wherein: the right side of the lifting rod (101) is fixedly connected with a transmission pin (102), the outer ring of the other end of the transmission pin (102) is rotatably sleeved with a first rotating groove (103), the other end of the first rotating groove (103) is rotatably connected with a pin shaft (104), the other end of the pin shaft (104) is rotatably connected with a second rotating groove (105), the other end of the second rotating groove (105) is fixedly connected with a rotating shaft (106), the other end of the rotating shaft (106) is fixedly connected with a driving gear (107), the driving gear (107) is vertically meshed with a first driven gear (108) and a second driven gear (109) respectively, and the first driven gear (108) and the second driven gear (109) are symmetrically distributed on the upper side and the lower side relative to the driving gear (107); lifter (101) left side with box (8) inner wall sliding connection, lifter (101) lower extreme all the time with cam (5) are tangent, pivot (106) right-hand member with box (8) rotate and are connected, cam (5) drive when ascending or descending motion is done to lifter (101), pivot (106) are in first rotating groove (103) rotate the round with the second under the drive of rotating groove (105).

4. The national music teaching device according to claim 2, wherein: the page turning mechanism (200) comprises a base (201), a limiting shaft (202) is fixedly connected to the upper surface of the right side of the base (201), a limiting pin (203) is connected to the other end of the limiting shaft (202) in a rotating mode, a swinging rod (204) is fixedly connected to the right end of the limiting pin (203), a sliding sleeve (205) is connected to the outer ring of the swinging rod (204) in a sliding mode, a driven groove (206) is connected to the upper end of the sliding sleeve (205) in a rotating mode, a transmission rod (207) is connected to the other end of the driven groove (206) in a rotating mode, a connecting block (208) is fixedly connected to the right end of the swinging rod (204), a connecting rod (209) is fixedly connected to the upper end of the connecting block (208), and a magnet (210) is fixedly connected to the top of the connecting rod (209).

5. The national music teaching device according to claim 4, wherein: base (201) right-hand member with box (8) inner wall rotates to be connected, transfer line (207) top with first driven gear (108) fixed connection, first driven gear (108) are in when driving gear (107) drive the lower rotation round, swinging arms (204) are followed the initial position music book right-hand member and are swung the music book left end and reply initial position again.

6. A national music teaching device according to claim 3, characterized in that: music book visual angle adjustment mechanism (300) is including bracing piece (301), bracing piece (301) left end fixedly connected with first movable post (302), bracing piece (301) right-hand member fixedly connected with second movable post (303), second driven gear (109) upper end fixedly connected with screw thread driven shaft (306), screw thread driven shaft (306) top threaded connection has thread bush (305), thread bush (305) top is rotated and is connected with third movable post (304), first movable post (302) and second movable post (303) symmetric distribution are in music stand (7) lower surface rear side both ends, third movable post (304) fixed connection is in music stand (7) lower surface front side middle part, when lifter (101) is ascending or descending motion, music stand (7) are in first movable post (302) and second movable post (303) drive down do ascending or descending motion, in this in-process third movable post (304) are in second driven gear (109) rotates the effect and adjusts the contained angle of music stand (7) and the horizontal plane.

7. The national music teaching device according to claim 2, wherein: the beat mechanism (400) comprises a grooved wheel (401), and a connecting plate (402) is arranged below the grooved wheel (401).