1. The utility model provides an ultrasonic wave does not have string musical instrument for enlightening teaching, includes musical instrument frame (1), its characterized in that: the bottom of the musical instrument frame (1) is fixedly embedded with a mounting box (2), the bottom of the mounting box (2) is provided with a sounding box (3), the top surface of the mounting box (2) is fixedly provided with a plurality of uniformly distributed ultrasonic sensors (4), the transmitting end and the receiving end of each ultrasonic sensor (4) are vertically upward, a controller (5), a signal amplification circuit (6) and a loudspeaker (7) are arranged inside the sounding box (3), the signal output end of each ultrasonic sensor (4) is electrically connected with the signal input end of the controller (5), and the signal output end of the controller (5) is electrically connected with the loudspeaker (7) through the signal amplification circuit (6);

one side of musical instrument frame (1) is equipped with installation panel (10), installation panel (10) are equipped with polylith sliding sleeve (11) towards the one side of musical instrument frame (1), the polylith sliding sleeve (11) is apart from the vertical height diverse of mounting box (2) upper surface, and the inside sliding connection of sliding sleeve (11) has shielding portion (12), the one end of shielding portion (12) exposes in the outside of sliding sleeve (11), and shielding portion (12) are located the inside one end of sliding sleeve (11) and are equipped with guide bar (13) perpendicularly, the one end that shielding portion (12) were kept away from in guide bar (13) runs through installation panel (10) and is connected with end cap (15).

2. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 1, wherein: one section outside cover that guide bar (13) are located sliding sleeve (11) inside is equipped with reset spring (14), reset spring (14)'s both ends respectively with installation panel (10) and shelter from portion (12) fixed connection.

3. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 1, wherein: one section outside cover that guide bar (13) are located sliding sleeve (11) outside is equipped with cushion ring (16), cushion ring (16) laminating is on the one side of mounting panel (10) back to musical instrument frame (1).

4. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 1, wherein: the top of musical instrument frame (1) is fixed and is provided with two installation ears (17), the top of mounting panel (10) and the outstanding shaping of one side towards musical instrument frame (1) have extension (24), extension (24) are located between two installation ears (17), and two installation ears (17) all with extension (24) normal running fit.

5. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 4, wherein: an arc-shaped groove (18) is formed in the mounting lug (17) in a penetrating mode, the arc-shaped groove (18) is a quarter arc section, the circle center corresponding to the arc-shaped groove (18) coincides with the axis of the extending portion (24) rotating around the mounting lug (17), a moving rod (19) penetrates through the arc-shaped groove (18), and one end of the moving rod (19) is fixedly connected with the extending portion (24).

6. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 5, wherein: one end of the moving rod (19) far away from the extending portion (24) is connected with a sliding block (20), one side of the sliding block (20) facing the circle center of the arc-shaped groove (18) is provided with a limiting hole (21), and the inner ring of the mounting lug (17), which faces away from the extending portion (24) and is located on the arc-shaped groove (18), is provided with a locking mechanism for locking and positioning the limiting hole (21).

7. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 1, wherein: the left side and the right side of the bottom surface of the mounting box (2) are both provided with supporting parts (8).

8. The ultrasonic string-free musical instrument for enlightenment teaching according to claim 1, wherein: the side wall of the sounding box (3) is provided with a sound spreading hole (9).

Background

At present, with the continuous improvement of education level, in order to expand the scientific visual field of students and cultivate the scientific quality and practical ability of the students to move hands and brain, love science and create, nowadays, most schools organize the students to participate in the science popularization and exhibition activities, thereby achieving the purposes of developing scientific ideas and popularizing the scientific knowledge of the students. Various popular science products such as optical guide equipment, yagi ladder and string-free instrument exist in the current popular science exhibition activities.

The existing wireless musical instrument is a musical instrument without strings and manufactured by utilizing a laser principle, the principle is that a laser generator is utilized to emit laser, when a barrier blocks a laser route, a development board can collect blocking signals and control a loudspeaker to make sound by utilizing a related program, and the loudspeaker can make different sounds or musical scales according to different positions of the barrier, so that the purpose of playing music is achieved.

The stringed instrument can play music, and can stimulate the learning interest of the students in love science due to the special working principle, so that the stringed instrument is popular in the market. However, since the price of laser products is high, the manufacturing cost of the laser string-free organ is high, so if an alternative scheme can be provided, the production cost of the string-free organ can be greatly reduced, and the popularization of the string-free organ is facilitated. In addition, the laser wireless organ is easy to hurt eyes in the using process, so that the laser wireless organ still has certain danger for children with small ages. Therefore, an ultrasonic string-free organ for enlightenment teaching is provided to well solve the defects.

Disclosure of Invention

The invention aims to provide an ultrasonic string-free piano for enlightening teaching, which utilizes ultrasonic equipment to replace laser equipment, thereby reducing the production cost of the string-free piano and avoiding the danger brought by laser products.

The above object of the present invention is achieved by the following technical solutions:

an ultrasonic string-free piano for enlightening teaching comprises a piano frame, wherein a mounting box is fixedly embedded in the bottom of the piano frame, a sounding box is arranged at the bottom of the mounting box, a plurality of ultrasonic sensors which are uniformly distributed are fixedly arranged on the top surface of the mounting box, the transmitting end and the receiving end of each ultrasonic sensor are vertically upward, a controller, a signal amplification circuit and a loudspeaker are arranged in the sounding box, the signal output end of each ultrasonic sensor is electrically connected with the signal input end of the controller, and the signal output end of the controller is electrically connected with the loudspeaker through the signal amplification circuit;

one side of musical instrument frame is equipped with the installation panel, the installation panel is equipped with polylith sliding sleeve, polylith towards the one side of musical instrument frame the vertical height diverse of sliding sleeve distance mounting box upper surface, and the inside sliding connection of sliding sleeve has shielding portion, shielding portion's one end exposes in the outside of sliding sleeve, and shielding portion is located the inside one end of sliding sleeve and is equipped with the guide bar perpendicularly, the one end that shielding portion was kept away from to the guide bar runs through the installation panel and is connected with the end cap.

Preferably, one section of outside cover that the guide bar is located the sliding sleeve inside is equipped with reset spring, reset spring's both ends respectively with installation panel and shielding part fixed connection.

Preferably, one section outside cover that the guide bar is located the sliding sleeve outside is equipped with the cushion collar, the cushion collar laminating is on the one side of mounting panel back to the musical instrument frame.

Preferably, the top of musical instrument frame is fixed and is provided with two installation ears, the top of installation panel and the outstanding shaping of one side towards the musical instrument frame have the extension, the extension is located between two installation ears, and two installation ears all with extension normal running fit.

Preferably, an arc-shaped groove is formed in the mounting lug in a penetrating mode, the arc-shaped groove is a quarter arc section, the circle center corresponding to the arc-shaped groove coincides with the axis of the extending portion rotating around the mounting lug, a moving rod penetrates through the arc-shaped groove, and one end of the moving rod is fixedly connected with the extending portion.

Preferably, the one end that the extension was kept away from to the carriage release lever is connected with the sliding block, spacing hole has been seted up to the one side of sliding block towards the arc wall centre of a circle, the one side that the installation ear back of the body is to the extension just is located the inner circle of arc wall and is equipped with the locking mechanism who is used for the spacing hole of closure location.

Preferably, the left side and the right side of the bottom surface of the mounting box are both provided with a supporting part.

Preferably, the side wall of the sounding box is provided with a sound expansion hole.

Compared with the prior art, the invention provides an ultrasonic string-free piano for enlightenment teaching, which has the following beneficial effects:

1. the invention utilizes the ultrasonic sensor to transmit and receive ultrasonic waves to judge the position of the barrier, thereby utilizing the horn to emit different scales, compared with a laser type stringed instrument, the invention has low price and avoids the danger that the laser type product is easy to accidentally injure the eyes of the children;

2. according to the invention, the mounting panel is provided with the plurality of sliding sleeves and the shielding parts positioned on the inner sides of the sliding sleeves, so that a user can control the positions of the shielding parts by pressing the end caps to make sounds, the operation is convenient, and the corresponding musical scales can be more accurately made.

Drawings

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

FIG. 2 is a cross-sectional view of the structure of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of a mounting panel structure according to the present invention;

fig. 5 is an enlarged corresponding view of the portion B in fig. 4.

In the figure: 1. a musical instrument frame; 2. mounting a box; 3. a generation box; 4. an ultrasonic sensor; 5. a controller; 6. a signal amplification circuit; 7. a horn; 8. a support portion; 9. a sound expansion hole; 10. installing a panel; 11. a sliding sleeve; 12. a shielding portion; 13. a guide bar; 14. a return spring; 15. an end cap; 16. a cushion washer; 17. mounting lugs; 18. an arc-shaped slot; 19. a travel bar; 20. a slider; 21. a limiting hole; 22. a fixed part; 23. positioning the bolt; 24. an extension portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1 and 2, an ultrasonic string-free piano for enlightenment teaching comprises a piano frame 1, the piano frame 1 is in a square shape, a mounting box 2 is fixedly embedded at the bottom of the piano frame 1, the mounting box 2 is fixedly connected with the piano frame 1 in a screwed mode, a sounding box 3 is arranged at the bottom of the mounting box 2, supporting parts 8 are arranged on the left side and the right side of the bottom surface of the mounting box 2, a plurality of uniformly distributed ultrasonic sensors 4 are fixedly arranged on the top surface of the mounting box 2, the type of the ultrasonic sensors 4 is HC-SR04, the transmitting end and the receiving end of the ultrasonic sensor 4 are both vertically upward, a controller 5, a signal amplifying circuit 6 and a loudspeaker 7 are arranged in the sounding box 3, the controller 5 is an Arduino NANO development board, the signal output end of the ultrasonic sensor 4 is electrically connected with the signal input end of the controller 5, and the signal output end of the controller 5 is electrically connected with the loudspeaker 7 through the signal amplifying circuit 6; the ultrasonic sensor 4 vertically emits ultrasonic waves upwards, when an obstacle passes above the ultrasonic sensor 4, the ultrasonic sensor 4 transmits a shielding signal to the controller 5, and the controller 5 controls the loudspeaker 7 to emit sound or musical scale through the signal amplification circuit 6; the side wall of the sounding box 3 is provided with a sound amplifying hole 9, and the sound amplifying hole 9 is arranged at a position close to the loudspeaker 7, so that the loudspeaker can sound conveniently.

Referring to fig. 2 and 3, a mounting panel 10 is disposed on one side of the piano frame 1, a plurality of sliding sleeves 11 are disposed on one side of the mounting panel 10 facing the piano frame 1, the vertical heights of the sliding sleeves 11 from the upper surface of the mounting box 2 are different, and a shielding portion 12 is slidably connected inside the sliding sleeves 11, so that the shielding portion 12 can slide out to shield the ultrasonic waves emitted by the ultrasonic sensor 4, one end of the shielding portion 12 is exposed outside the sliding sleeves 11, a guide rod 13 is vertically disposed at one end of the shielding portion 12 inside the sliding sleeves 11, one end of the guide rod 13 far away from the shielding portion 12 penetrates through the mounting panel 10 and is connected to an end cap 15, and a user can control the position of the shielding portion 12 by manually holding the end cap 15; a section of the guide rod 13 located inside the sliding sleeve 11 is sleeved with a return spring 14, two ends of the return spring 14 are respectively and fixedly connected with the installation panel 10 and the shielding part 12, and the return spring 14 is used for maintaining the position of the shielding part 12 under the action of no external force; a section of the guide rod 13 outside the sliding sleeve 11 is sleeved with a buffer washer 16, the buffer washer 16 is made of rubber, and the buffer washer 16 is attached to the face, back to the piano frame 1, of the mounting panel 10, so that rigid collision between the end cap 15 and the mounting panel 10 is avoided.

Referring to fig. 1, 4 and 5, two mounting ears 17 are fixedly disposed on the top of the piano frame 1, an extension 24 is formed on the top of the mounting panel 10 and protrudes toward one side of the piano frame 1, the extension 24 is located between the two mounting ears 17, the two mounting ears 17 are rotatably engaged with the extension 24, a short shaft is disposed on one side of the mounting ears 17 facing the extension 24, and the short shaft is inserted into the extension 24, so that the extension 24 can rotate around the short shaft; the installation ear 17 is provided with an arc-shaped groove 18 in a penetrating manner, the arc-shaped groove 18 is a quarter arc segment, the circle center corresponding to the arc-shaped groove 18 coincides with the axis of the extension portion 24 rotating around the installation ear 17, the moving rod 19 penetrates through the arc-shaped groove 18, one end of the moving rod 19 is fixedly connected with the extension portion 24, and when the extension portion 24 rotates around the installation ear 17, the moving rod 19 always slides on the inner side of the arc-shaped groove 18.

One end of the moving rod 19, which is far away from the extending part 24, is connected with a sliding block 20, one side of the sliding block 20, which faces the center of the arc-shaped groove 18, is provided with a limiting hole 21, and the mounting lug 17, which is back to the side of the extending part 24 and is positioned at the inner ring of the arc-shaped groove 18, is provided with a locking mechanism for locking and positioning the limiting hole 21; the locking mechanism comprises a fixing part 22 fixedly connected to the mounting lug 17 and a positioning bolt 23 in threaded connection with the fixing part 22, when the mounting panel 10 rotates to be parallel to the upper surface of the mounting box 2, the limiting hole 21 faces downwards, and at the moment, a user can manually rotate the positioning bolt 23 to enable the top end of the positioning bolt 23 to be inserted into the limiting hole 21, so that the position of the mounting panel 10 is fixed.

The working principle is as follows: in the using process of the invention, the ultrasonic sensor 4 vertically emits ultrasonic waves upwards, when the ultrasonic sensor is shielded by an obstacle, the ultrasonic sensor 4 can transmit a shielding signal to the controller 5, and the controller 5 controls the loudspeaker 7 to emit sound through the signal amplifying circuit 6. Because the ultrasonic sensor 4 has a distance measuring function, the ultrasonic sensor 4 can obtain different shielding signals for obstacles at different positions, and then can control the loudspeaker to emit different scales according to a preset program in the controller 5, namely, different distances between the obstacles and the ultrasonic sensor 4 correspond to different scales. In use, a user can control the position of the shielding parts 12 by manually pressing the end cap 15, so that the shielding parts 12 block the ultrasonic waves emitted by the ultrasonic sensor 4, and each shielding part 12 can correspond to different scales because the vertical height of each shielding part 12 from the upper surface of the mounting box 2 is different. If the user does not need to use the shielding portion 12 as an obstacle, the mounting panel 10 may be turned upward so that the mounting panel 10 is parallel to the upper surface of the mounting box 2, and then another obstacle may be used to generate sound.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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