Single-string instrument teaching device

Abstract

The utility model relates to the technical field of teaching, and discloses a single-string instrument teaching device which comprises a single-string instrument body, the single-string instrument body is placed on the top surface of a placing box, a plurality of cameras are installed on the rear side of the top surface of the placing box, the cameras directly face rockers and overtone points on the single-string instrument body, and a screen plate is installed on the front side of the placing box. The front side surface of the screen plate is provided with a display screen for rocking bar and overtone point indication. According to the teaching device, the rocker and the overtone points are shot, monitored and recognized through the camera, and are displayed through the display screen directly facing a student, so that string plucking actions of the rocker on the overtone points are clearly visible during playing, and the student can learn playing of the single string instrument in combination with fingering actions of a teacher and point position display of the display screen.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching, in particular to a monochord teaching device. Background Art

[0002] The one-stringed harp, also known as the one-stringed gourd harp or the one-stringed harp, is popular in the Jing ethnic group settlements in Dongxing City, Guangxi, my country. It is called the one-stringed harp because it has only one string. It is mainly composed of the body, pegs, rocker, strings, and a pick. Some models also have a resonance tube at the connection between the string and the rocker.

[0003] When teaching the monochord, it is particularly important to control the joystick and the overtone points of the strings. When teaching a large number of students, since the seats are scattered, the vertical joystick can still be viewed steadily, but the overtone point markings on the top of the instrument cannot be viewed steadily, which affects their learning of the plucking position of the pick stick. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a monochord teaching device to solve the problems in the background technology.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A monochord teaching device comprises a monochord body, wherein the monochord body is placed on the top surface of a placement box, a plurality of cameras are installed at the rear side of the top surface of the placement box, the cameras are directly facing the rocker and harmonic points on the monochord body, a screen is installed at the front side of the placement box, and a display screen for indicating the rocker and harmonic points is installed on the front and side surfaces of the screen.

[0009] Preferably, a concave cavity is preset on the top surface of the placement box, and the monochord body is placed and supported at the position of the concave cavity.

[0010] Preferably, the cavity is provided with support beams at both ends thereof, and the monochord body is supported by the support beams.

[0011] Preferably, a placement groove is preset on the support beam corresponding to the position of the monochord body, and the monochord body falls into the placement groove for support.

[0012] Preferably, the screen panel and the placement box are hinged and fixed by a hinge, and the hinge includes a hinge seat 1 and a hinge seat 2. The hinge seat 1 is fixed to a side of the screen panel facing the placement box, and the hinge seat 2 is fixed to a side of the placement box facing the screen panel. The hinge seat 1 is arranged at a position corresponding to the hinge seat 2, and the hinge seat 1 and the hinge seat 2 are hingedly fixed by a hinge axis crossing therebetween.

[0013] Preferably, a locking piece is installed between the screen plate and the placement box, and the locking piece includes a disc, which is fixed at the left and right ends of the screen plate, and the center line of the disc coincides with the axis of the hinge shaft. A movable through groove is opened on the disc corresponding to the position of the placement box, and a stud passing through the movable through groove is installed on the placement box. The stud is threadedly connected with a nut that is tightly fixed against the disc.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a monochord teaching device, which has the following beneficial effects:

[0016] 1. The teaching device uses a camera to monitor and identify the joystick and each harmonic point, and displays it on a display screen facing the students, so that the plucking action of the stick on each harmonic point is clearly visible during playing. Students can learn to play the monochord by combining the fingering actions of the teaching staff and the point display on the display screen.

[0017] 2. The teaching device hinges and fixes the screen panel through hinges, so that the display angle of the display screen can be freely adjusted to meet the stable viewing needs of students in a wider range.

[0018] 3. The teaching device uses a locking piece to match the hinge piece to lock and fix the adjusted screen plate, which can prevent the screen plate from rotating freely and ensure stable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the utility model;

[0020] Figure 2 It is a rear view of the utility model;

[0021] Figure 3 It is a three-dimensional diagram of the placement box in the utility model;

[0022] Figure 4 It is a schematic diagram of the connection between the placement box and the screen plate in the utility model;

[0023] Figure 5 It is a cross-sectional view of the placement box in the utility model.

[0024] In the figure: 1. monochord body; 11. overtone point; 12. rocker; 2. storage box; 21. support beam; 22. cavity; 23. storage slot; 3. camera; 4. display screen; 5. screen board; 6. hinge; 61. hinge seat 1; 62. hinge seat 2; 63. hinge shaft; 7. locking piece; 71. disc; 72. stud; 73. nut; 75. movable through slot; 8. battery; 9. control main board. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-5 A monochord teaching device comprises a monochord body 1, the monochord body 1 is placed on the top surface of a placing box 2, a concave cavity 22 is preset on the top surface of the placing box 2, a support beam 21 is preset at both ends of the concave cavity 22, a placement groove 23 is preset on the support beam 21 corresponding to the position of the monochord body 1, and the monochord body 1 falls in the placement groove 23 for support;

[0027] Seven cameras 3 are installed at the rear side of the top surface of the placement box 2, six of which are respectively arranged corresponding to the overtone points 11 of the monochord body 1, one camera 3 is arranged corresponding to the rocker 12 of the monochord body 1, the six cameras 3 are facing the strings at the positions of the overtone points 11, one camera 3 is facing the rocker 12, a screen board 5 is installed at the front side of the placement box 2 away from the cameras 3, and a display screen 4 is installed on the front side of the screen board 5;

[0028] A rechargeable battery 8 is installed in the middle position of the placement box 2. The battery 8, the display screen 4 and the cameras 3 are electrically connected. A control mainboard 9 is also integrated in the placement box 2. The control mainboard 9 uses the stm32 single-chip microcomputer as the control core, and integrates a capture system for picking up the stick at the overtone point 11 position and a posture recognition system for the joystick 12.

[0029] When in use, the monochord body 1 is placed on the top of the placement box 2 at the placement slot 23, and the display screen 4 is kept facing the student. When playing, the camera 3 shoots and monitors the joystick 12 and the positions of each overtone point 11. When the string at any overtone point 11 is plucked, the camera 3 captures the intervening object and triggers the overtone point 11 at the corresponding position for identification. At this time, a striking prompt is given on the display screen 4 for the corresponding position. At the same time, when playing, the camera 3 also monitors the joystick 12. When the joystick 12 is swung left and right, the vertical state of the joystick 12 is changed, and the camera 3 captures its swing position and angle, and displays them on the display screen 4 simultaneously. When learning, the student can learn by combining the playing on the monochord body 1 and the operation of the joystick 12 and the overtone point 11 on the display screen 4, and can show the playing skills more clearly.

[0030] In this embodiment, the screen panel 5 and the placement box 2 are hinged and fixed by a hinge 6, and the hinge 6 includes a hinge seat 1 61, a hinge seat 2 62 and a hinge shaft 63. The hinge seat 1 61 is fixed by screws on a side of the screen panel 5 facing the placement box 2, and the hinge seat 2 62 is fixed by screws on a side of the placement box 2 facing the screen panel 5. The hinge seat 1 61 is arranged at a position corresponding to the hinge seat 2 62, and the hinge seat 1 61 and the hinge seat 2 62 are hinged and fixed by a hinge shaft 63 crossing therebetween.

[0031] The screen panel 5 is hingedly fixed to the placement box 2 so that the screen panel 5 can rotate within the range of the hinge, thereby adjusting the display angle of the display screen 4. The angle can be adjusted according to the situation of the students so that the students can watch clearly.

[0032] In this embodiment, a locking member 7 is also installed between the screen plate 5 and the placement box 2. The locking member 7 includes a disc 71, which is fixed by hot melt at the left and right ends of the screen plate 5. The disc 71 coincides with the axis of the hinge shaft 63. A movable through groove 75 with an arc of 180° is opened on the disc 71 corresponding to the position of the placement box 2. A stud 72 passing through the movable through groove 75 is hot melt-installed on the placement box 2. A nut 73 is threadedly connected to the stud 72 and fixed tightly against the disc 71.

[0033] The locking piece 7 is used to lock and fix the screen panel 5 after the angle is adjusted to prevent it from rotating freely. Before adjusting the angle of the screen panel 5, loosen the nut 73 first, and rotate the screen panel 5 to adjust it. During adjustment, since the disc 71 and the hinge shaft 63 are coaxial, the stud 72 will move in the movable through groove 75 to meet the rotation adjustment requirements of the screen panel 5. After adjustment, tighten the nut 73 to fix the disc 71 against the side of the placement box 2, so that it can be locked and fixed.

Claims

1. A monochord teaching device, comprising a monochord body (1), characterized in that: The monochord body (1) is placed on the top surface of a placement box (2); a plurality of cameras (3) are installed at the rear side of the top surface of the placement box (2); the cameras (3) are directly facing the rocker (12) and the overtone point (11) on the monochord body (1); a screen (5) is installed at the front side of the placement box (2); and a display screen (4) for displaying the rocker (12) and the overtone point (11) is installed on the front side of the screen (5).

2. A monochord teaching device according to claim 1, characterized in that: The top surface of the placement box (2) is preset with a concave cavity (22), and the monochord body (1) is placed and supported at the position of the concave cavity (22).

3. A monochord teaching device according to claim 2, characterized in that: Support beams (21) are preset at the left and right end positions in the concave cavity (22), and the monochord body (1) is placed and supported at the positions of the support beams (21).

4. A monochord teaching device according to claim 3, characterized in that: A placement groove (23) is preset on the support beam (21) at a position corresponding to the monochord body (1), and the monochord body (1) falls into the placement groove (23) for support.

5. The monochord teaching device according to claim 1, characterized in that: The screen plate (5) and the placement box (2) are hingedly fixed via a hinge (6), the hinge (6) comprising a hinge seat 1 (61) and a hinge seat 2 (62), the hinge seat 1 (61) being fixed on a side of the screen plate (5) facing the placement box (2), the hinge seat 2 (62) being fixed on a side of the placement box (2) facing the screen plate (5), the hinge seat 1 (61) being arranged at a position corresponding to the hinge seat 2 (62), and the hinge seat 1 (61) and the hinge seat 2 (62) being hingedly fixed via a hinge shaft (63) which crosses the hinge seat 1 (61) and the hinge seat 2 (62).

6. A monochord teaching device according to claim 5, characterized in that: A locking member (7) is also installed between the screen plate (5) and the placement box (2). The locking member (7) includes a disc (71). The disc (71) is fixed at the left and right ends of the screen plate (5). The axis of the disc (71) coincides with the axis of the hinge shaft (63). The disc (71) has a movable through groove (75) at a position corresponding to the placement box (2). The placement box (2) is provided with a stud (72) passing through the movable through groove (75). The stud (72) is threadedly connected with a nut (73) that is tightly pressed against the disc (71) and fixed.

Images