CN116013222A

CN116013222A - Stable supporting structure of upright piano

Info

Publication number: CN116013222A
Application number: CN202211604746.4A
Authority: CN
Inventors: 蔡静; 黄亮
Original assignee: Jiujiang University
Current assignee: Jiujiang University
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-04-25

Abstract

The invention discloses a stable supporting structure of an upright piano, and relates to the technical field of piano support. According to the piano body, the screw nut sleeve and the universal pulley are matched, a user can open the motor, so that the first mounting plate can extrude and drive the universal pulley, the position of the piano body can be conveniently adjusted by the user, the user can connect the first limiting block with the first limiting groove, the pressure born by the ball screw is reduced, the service life of the piano body is prolonged, when the piano body moves to a designated place, the user can withdraw the first limiting block, then drive the screw nut sleeve to move upwards through the motor, at the moment, the first spring can rebound to drive the universal pulley to move into the first mounting groove, the position of the piano body is adjusted, and the stability of the piano body in use can be guaranteed through contact of the supporting legs and the ground.

Description

Stable supporting structure of upright piano

Technical Field

The invention relates to the technical field of piano support, in particular to a stable support structure of an upright piano.

Background

The piano is a keyboard musical instrument in classical music, and has a American name of "king of musical instrument". Consists of 88 keys (52 white keys, 36 black keys) and a metal string soundboard. Italian invented a piano in 1709. The 88-key piano range from A0 (27.5 Hz) to C8 (4186.01 Hz), the 108 keys are up to B8 (7902.13 Hz), almost all the tones in the musical system are covered, and the musical instrument with the widest range except for the organ. Pianos are commonly used for performances such as solo, accent, accompaniment, etc. And because the piano price is generally higher, when part performance or activity need use the piano, part user can select to rent the piano, but because the piano body is heavier to because the piano itself belongs to comparatively accurate musical instrument, so in order to make things convenient for the piano transportation, part piano can install the locking universal wheel additional in the bottom all around, thereby convenience of customers uses and transports.

When the piano is transported to the destination through locking the universal wheels, however, because the piano body is heavier, the whole gravity of piano is concentrated on four universal wheels entirely, and the stress point of universal wheel bottom is less, when the piano receives collision or extrusion, the piano appears rocking easily this moment, and then leads to the piano to appear removing the damage easily, and universal wheel overall stability is relatively poor, when the user adjusts the piano through stepping on the footboard, the piano appears rocking easily at the in-process of using this moment, and then influences user's normal use.

Disclosure of Invention

The present invention is directed to a stable supporting structure of an upright piano to solve the problems set forth in the background art described above.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a stable supporting structure of vertical piano, includes the piano body, two supporting legs of piano body bottom symmetry fixedly connected with, two the inside first mounting groove that has all seted up of supporting leg, the inside fixedly connected with motor of first mounting groove, motor output fixedly connected with ball screw, the outside cover of ball screw is equipped with the lead screw nut sleeve of looks adaptation, the inside first mounting panel that is equipped with of first mounting groove, first mounting panel bottom rotates and is connected with a plurality of universal pulleys, lead screw nut sleeve one end fixedly connected with limiting plate, a plurality of first limiting grooves have been seted up to limiting plate surface equidistance, two the second mounting groove has all been seted up to the supporting leg inside, the inside second mounting panel that is equipped with of second mounting groove, lead screw nut sleeve bottom fixedly connected with locating piece.

Further, the first slider of lead screw nut sleeve outer wall symmetry fixedly connected with, two the first spout with first slider looks adaptation is all offered to the supporting leg is inside, lead screw nut sleeve passes through first slider and supporting leg sliding connection, first constant head tank with locating piece looks adaptation is offered at first mounting panel top, uses through the cooperation of first slider and the inside first spout of backup pad for ball screw has stability when driving the lead screw nut sleeve and remove, uses through the cooperation of locating piece and first constant head tank, can guarantee the stability when the extrusion of lead screw nut sleeve drives first mounting panel and remove.

Further, two second sliders of first mounting panel outer wall symmetry fixedly connected with, two the second spout with second slider looks adaptation has all been seted up to the supporting leg is inside, first mounting panel passes through second slider and second spout sliding connection, two first logical groove has all been seted up to the supporting leg bottom, uses through the cooperation of second slider and second spout, can guarantee the stability when first mounting panel removes to can guarantee the stability of universal pulley.

Further, two equal fixedly connected with first spring in second slider bottom, first spring bottom and supporting leg fixed connection, when the screw-nut sleeve no longer extrudees first mounting panel, first spring can rebound this moment and drive first mounting panel and reset, and then convenience of customers accomodates universal pulley.

Further, two equal threaded connection in supporting leg has the threaded rod, the one end that the second mounting panel was kept away from to the threaded rod extends to the supporting leg outside, the threaded rod other end extends to inside the second mounting groove, the threaded rod rotates with the second mounting panel to be connected, the second mounting panel is close to the first stopper of a plurality of and first spacing groove looks adaptation of one end equidistance fixedly connected with of first spacing groove, and the user can drive the second mounting panel through rotatory threaded rod and remove, can guarantee the stability of second mounting panel through the threaded rod simultaneously, can play the effect of support to the limiting plate through the cooperation use of first stopper and first spacing groove, and then reduces ball screw's pressure that bears, and then can prolong ball screw's life.

Further, the second mounting groove is linked together with first mounting groove, two the second spacing groove with second mounting panel looks adaptation has all been seted up to the supporting leg inside, the second mounting panel passes through second spacing groove and supporting leg sliding connection, can guarantee the stability when the second mounting panel removes through the second spacing groove, and then is convenient for guarantee the stability that first stopper and limiting plate are connected.

Further, the inside slide that is equipped with of first mounting groove, slide bottom fixedly connected with regulating plate, slide inside sliding connection has the backup pad, two the second through groove has all been seted up on the supporting leg surface, two the third spacing groove with backup pad looks adaptation has all been seted up to the supporting leg inside, can guarantee the stability when the backup pad removes through the third spacing groove, and then the user of being convenient for adjusts the position of regulating plate.

Further, two third sliders of slide outer wall symmetry fixedly connected with, two the third spout with third slider looks adaptation is all offered to the supporting leg is inside, two the equal fixedly connected with second spring in third slider bottom, second spring bottom and supporting leg fixed connection can be guaranteed to the cooperation through third slider and third spout and stability when the slide removes is used, and then makes things convenient for the slide to drive the regulating plate and remove, and when the screw-nut sleeve no longer extrudees the backup pad, the second spring can rebound and drive the slide and reset this moment, and then convenience of customers accomodates the backup pad.

Further, backup pad outer wall fixedly connected with second stopper, the second constant head tank with locating piece looks adaptation has been seted up at the backup pad top, the backup pad is inside to be seted up first storage tank, first storage tank is inside to be equipped with the pull rod, first storage tank inner wall has seted up the internal thread, two the second storage tank with the pull rod looks adaptation has all been seted up on the supporting leg surface, uses through the cooperation of locating piece with the second constant head tank, can guarantee the stability when lead screw nut sleeve drives the backup pad and remove, is convenient for the user to take out the backup pad from the slide is inside through the pull rod, and then the user of being convenient for adjusts the position of universal pulley.

Further, pull rod one end fixedly connected with and the connector of internal thread looks adaptation, pull rod outer wall size and second accomodate groove inner wall size looks adaptation, connector and internal thread threaded connection use through the cooperation of connector and internal thread for the user conveniently promotes the backup pad through the pull rod and moves inside the slide, thereby the position of backup pad is adjusted to the convenience of customers, and then makes things convenient for the screw-nut sleeve to extrude the backup pad, and then conveniently changes the position of regulating plate.

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

1. according to the invention, through the cooperation use of the screw-nut sleeve and the universal pulley, when a user needs to move the piano body, the user can adjust the position of the screw-nut sleeve by opening the motor, the screw-nut sleeve can squeeze the first mounting plate in the downward moving process, so that the first mounting plate can squeeze and drive the universal pulley, and further the universal pulley is in contact with the ground, thereby facilitating the user to adjust the position of the piano body, and the user can drive the first limiting block through the rotary threaded rod, the pressure born by the ball screw can be reduced through the connection of the first limiting block and the first limiting groove, and further the service life of the ball screw can be prolonged, so that the service life of the piano body is prolonged, when the piano body moves to a designated place, the user can draw the first limiting block from the inside of the first limiting groove, and then drive the screw-nut sleeve to move upwards through the motor, and at the moment, the first spring can rebound drive the universal pulley to move to the inside of the first mounting groove, and further the adjustment of the position of the piano body is completed, and the stability of the piano body in use can be ensured through the contact of the supporting legs and the ground.

2. According to the invention, through the cooperation of the sliding plate and the supporting plate, when a user needs to adjust the level of the piano body according to the ground angle, the user can push the supporting plate, so that one end of the supporting plate can be connected with the third limiting groove, then the user can drive the supporting plate to move through adjusting the screw nut sleeve, the supporting plate can be extruded to drive the adjusting plate to move downwards in the moving process of the supporting plate, and along with the moving of the adjusting plate, the adjusting plate can jack up one end of the piano body at the moment, and further the user can conveniently adjust the level of the piano body, so that the application range of equipment can be enlarged.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:

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

FIG. 2 is a schematic view of a partial cross-sectional structure of a support leg of the present invention;

FIG. 3 is a schematic cross-sectional view of the adjusting plate of the present invention after movement;

FIG. 4 is an enlarged view of the structure at A of FIG. 2;

FIG. 5 is a schematic cross-sectional side view of a first mounting plate and support leg connection of the present invention;

FIG. 6 is a schematic top view of the first mounting plate of the present invention;

FIG. 7 is a schematic view of a partial side elevational view of a support leg of the present invention;

FIG. 8 is a schematic side sectional view of the support leg, support plate connection of the present invention;

FIG. 9 is an enlarged view of the structure at B of FIG. 2;

FIG. 10 is a schematic top sectional view of the skateboard and support plate connection of the present invention.

In the figure: 1. a piano body; 2. support legs; 3. a first mounting groove; 4. a motor; 5. a ball screw; 6. a feed screw nut sleeve; 7. a first mounting plate; 8. a universal pulley; 9. a limiting plate; 10. a first limit groove; 11. a second mounting groove; 12. a second mounting plate; 13. a positioning block; 14. a first slider; 15. a first positioning groove; 16. a second slider; 17. a second chute; 18. a first through groove; 19. a first spring; 20. a threaded rod; 21. a first limiting block; 22. the second limit groove; 23. a slide plate; 24. an adjusting plate; 25. a support plate; 26. a second through slot; 27. a third limit groove; 28. a third slider; 29. a third chute; 30. a second spring; 31. a second limiting block; 32. a second positioning groove; 33. a first storage groove; 34. an internal thread; 35. a second storage groove; 36. a connector; 37. and (5) a pull rod.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the present invention provides the following technical solutions: the stable supporting structure of the upright piano comprises a piano body 1, two supporting legs 2 are symmetrically and fixedly connected at the bottom of the piano body 1, a first mounting groove 3 is formed in each of the two supporting legs 2, a motor 4 is fixedly connected in each of the first mounting grooves 3, a ball screw 5 is fixedly connected at the output end of the motor 4, a screw nut sleeve 6 which is matched with the ball screw 5 is sleeved outside the ball screw 5, a first sliding block 14 is symmetrically and fixedly connected on the outer wall of the screw nut sleeve 6, first sliding grooves which are matched with the first sliding block 14 are formed in each of the two supporting legs 2, the screw nut sleeve 6 is in sliding connection with the supporting legs 2 through the first sliding block 14, a first positioning groove 15 which is matched with a positioning block 13 is formed in the top of a first mounting plate 7, a first mounting plate 7 is arranged in each of the first mounting grooves 3, two second sliding blocks 16 are symmetrically and fixedly connected on the outer wall of the first mounting plate 7, the bottoms of the two second sliding blocks 16 are fixedly connected with first springs 19, the bottoms of the first springs 19 are fixedly connected with supporting legs 2, second sliding grooves 17 matched with the second sliding blocks 16 are formed in the two supporting legs 2, the first mounting plates 7 are in sliding connection with the second sliding grooves 17 through the second sliding blocks 16, first through grooves 18 are formed in the bottoms of the two supporting legs 2, a plurality of universal pulleys 8 are rotatably connected to the bottoms of the first mounting plates 7, a limiting plate 9 is fixedly connected to one end of a screw nut sleeve 6, a plurality of first limiting grooves 10 are formed in the surface of the limiting plate 9 at equal intervals, second mounting grooves 11 are formed in the two supporting legs 2, the second mounting grooves 11 are communicated with the first mounting grooves 3, second limiting grooves 22 matched with the second mounting plates 12 are formed in the two supporting legs 2, the second mounting plates 12 are in sliding connection with the supporting legs 2 through the second limiting grooves 22, the inside second mounting panel 12 that is equipped with of second mounting groove 11, lead screw nut sleeve 6 bottom fixedly connected with locating piece 13, the equal threaded connection of two supporting legs 2 are inside to have threaded rod 20, and the one end that second mounting panel 12 was kept away from to threaded rod 20 extends to the supporting leg 2 outside, and the threaded rod 20 other end extends to the inside of second mounting groove 11, and threaded rod 20 rotates with second mounting panel 12 to be connected, and the one end equidistance fixedly connected with that second mounting panel 12 is close to first spacing groove 10 a plurality of and the first stopper 21 of first spacing groove 10 looks adaptation.

The implementation mode specifically comprises the following steps: when the user needs to adjust the position of the piano body 1, the user can drive the ball screw 5 to rotate by opening the motor 4, the ball screw 5 can drive the screw nut sleeve 6 to move downwards by rotation, the screw nut sleeve 6 can smoothly move downwards along the first sliding groove in the supporting leg 2 by the first sliding block 14, the screw nut sleeve 6 can drive the positioning block 13 to move downwards in the downward moving process, when the positioning block 13 enters the first positioning groove 15 at the top of the first mounting plate 7, the positioning block 13 presses the first mounting plate 7, the first mounting plate 7 moves downwards along the first mounting plate 7 by the second sliding block 16, then the second sliding block 16 presses the first spring 19, so that the first spring 19 is in a contracted state, then the first mounting plate 7 can drive the universal pulley 8 to move downwards by the first through groove 18 under the pressing of the positioning block 13, when the bottom of the universal pulley 8 is contacted with the ground, the user can close the motor 4, at this time, the piano body 1 can be driven to move through the universal pulley 8, and after the bottom of the universal pulley 8 is contacted with the ground, the user can move along the supporting leg 2 by rotating the threaded rod 20, the threaded rod 20 can push the second mounting plate 12 to move along the second limiting groove 22 in the rotating process, the second limiting groove 22 can drive the first limiting block 21 to gradually approach the first limiting groove 10 in the limiting plate 9 in the moving process, the first limiting block 21 enters the first limiting groove 10 at this time along with the continuous rotation of the threaded rod 20 by the user, so that the plurality of first limiting blocks 21 can play a supporting role on the limiting plate 9, and the pressure born by the ball screw 5 when the piano body 1 moves can be reduced, thereby can prolong the life of ball screw 5, when piano body 1 moved to appointed place, the user can the reverse direction rotatory threaded rod 20 this moment, thereby make threaded rod 20 drive second mounting panel 12 and first stopper 21, thereby make first stopper 21 can follow the inside of first spacing groove 10 and take out, the user can drive ball screw 5 reverse direction rotation through accommodate motor 4 this moment, ball screw 5 drives lead screw nut sleeve 6 and upwards moves this moment, along with lead screw nut sleeve 6 constantly rises, locating piece 13 bottom is not at extrusion contact first mounting panel 7 this moment, first spring 19 rebound can drive second slider 16 and reset this moment, second slider 16 can drive first mounting panel 7 at the in-process that resets, thereby make universal pulley 8 can accomodate the inside of getting into first mounting groove 3 again, thereby make the bottom of supporting leg 2 can contact with ground again, thereby stability of piano body 1 can be guaranteed, and then guarantee user's normal use.

Referring to fig. 1, 2, 3, 7, 8, 9 and 10, the present invention provides the following technical solutions: the utility model provides a stable supporting structure of vertical piano, the inside slide 23 that is equipped with of first mounting groove 3 in addition, slide 23 bottom fixedly connected with regulating plate 24, slide 23 inside sliding connection has backup pad 25, the second through groove 26 has all been seted up to two supporting leg 2 surfaces, the third spacing groove 27 with backup pad 25 looks adaptation has all been seted up to two supporting leg 2 insides, slide 23 outer wall symmetry fixedly connected with two third sliders 28, the third spout 29 with third slider 28 looks adaptation has all been seted up to two supporting leg 2 insides, two third slider 28 bottoms all fixedly connected with second spring 30, second spring 30 bottom and supporting leg 2 fixed connection, backup pad 25 outer wall fixedly connected with second stopper 31, the second constant head tank 32 with locating piece 13 looks adaptation has been seted up at backup pad 25 top, first storage groove 33 has been seted up to the inside pull rod 37 that is equipped with of backup pad 25, first storage groove 33 inner wall sets up internal thread 34, the second storage groove 35 with the pull rod 37 looks adaptation has all been seted up on two supporting leg 2 surfaces, 37 looks adaptation second storage groove 35, 37 one end fixedly connected with connector looks inner wall 34 and second thread size of connecting head 37 looks adaptation thread 36, the size of connecting head and internal thread 34 looks adaptation thread size 36.

The implementation mode specifically comprises the following steps: because the use places of the piano body 1 are different, when the places of the piano body 1 are different, the part of the ground of the places possibly has a part of concave, so that the piano is influenced by the radian of the ground in the use process, and the normal use of a user is influenced, when the user moves the piano body 1 to a designated place, when one end of the piano body 1 is lower, the user can pull the pull rod 37 at this time, when the connector 36 in the pull rod 37 is in contact with the internal thread 34, the user rotates the pull rod 37 to drive the connector 36 at this time, so that the connector 36 is connected with the internal thread 34, then the user pushes the pull rod 37 to drive the support plate 25 to move in the interior of the slide plate 23, when one end of the support plate 25 is in contact with the third limit groove 27, the user can drive the lead screw nut sleeve 6 to move downwards by opening the motor 4 at this time, the lead screw nut sleeve 6 drives the positioning block 13 to enter the second positioning groove 32 in the downward moving process, the positioning block 13 presses the supporting plate 25, the supporting plate 25 drives the sliding plate 23 to move downwards, then the sliding plate 23 can move downwards stably along the third sliding groove 29 through the third sliding block 28, meanwhile, the third sliding block 28 can press the second spring 30 in the downward moving process, so that the second spring 30 is in a contracted state, the pull rod 37 can move downwards in the second accommodating groove 35, the sliding plate 23 drives the adjusting plate 24 to move out of the first through groove 18 along with the continuous descending of the lead screw nut sleeve 6, so that the adjusting plate 24 can be pressed to contact with the ground, one end of the piano body 1 can be lifted through the adjusting plate 24, the height of the adjusting plate 24 can be adjusted according to the gradient of the ground conveniently by a user, the level degree of the piano body 1 can be ensured when in use, and then convenience of customers uses, simultaneously also guaranteed the stability of piano body 1, after piano body 1 finishes using, the user can be through motor 4 adjusting screw nut sleeve 6 upwards removal this moment, locating piece 13 no longer extrudees backup pad 25 this moment, then second spring 30 can rebound and drive third slider 28, slide 23, backup pad 25 and pull rod 37 and reset, then the user can take backup pad 25 out from the bottom of locating piece 13 through pull rod 37, thereby make backup pad 25 can reset, thereby convenience of customers adjusts piano body 1 according to the ground slope next time, thereby enlarge piano body 1's application scope.

The working principle of the invention is as follows:

referring to fig. 1 to 6, through the cooperation use of lead screw nut sleeve 6 and universal pulley 8, when the user needs to remove piano body 1, the user can be through opening the position of motor 4 adjusting lead screw nut sleeve 6, lead screw nut sleeve 6 can extrude first mounting panel 7 in the process of downwardly moving, thereby make first mounting panel 7 can extrude and drive universal pulley 8, and then make universal pulley 8 and ground contact, thereby the user adjusts the position of piano body 1 conveniently, and the user can drive first stopper 21 through rotatory threaded rod 20, can reduce the pressure that ball screw 5 bore through the connection of first stopper 21 with first spacing groove 10, and then can prolong the life of ball screw 5, thereby the life of piano body 1, when piano body 1 removes to appointed place, the user can be through taking out first stopper 21 from first spacing groove 10 inside, then drive lead screw nut sleeve 6 through motor 4 and upwards remove, at this moment first spring 19 can rebound drive universal pulley 8 and remove to the inside of first mounting groove 3, and then accomplish the regulation of piano body 1 position, through supporting leg 2 and the stability when the piano body is used with the assurance ground, thereby the stability when using piano body 1.

Further, referring to fig. 1, fig. 2, fig. 3, fig. 7, fig. 8, fig. 9 and fig. 10 of the specification, through the cooperation of the slide plate 23 and the support plate 25, when the user needs to adjust the level of the piano body 1 according to the ground angle, the user can push the support plate 25, thereby making one end of the support plate 25 be connected with the third limit groove 27, then the user can drive the support plate 25 to move through adjusting the lead screw nut sleeve 6, and the in-process of the movement of the support plate 25 can squeeze and drive the adjusting plate 24 to move downwards, along with the movement of the adjusting plate 24, the adjusting plate 24 can jack up one end of the piano body 1 at this moment, thereby facilitating the user to adjust the level of the piano body 1, and further expanding the application range of the device.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stable support structure of an upright piano, comprising a piano body (1);

the method is characterized in that:

the piano body (1) bottom symmetry fixedly connected with supporting leg (2), two first mounting groove (3) have all been seted up to supporting leg (2) inside, first mounting groove (3) inside fixedly connected with motor (4), motor (4) output fixedly connected with ball screw (5), ball screw (5) outside cover is equipped with lead screw nut sleeve (6) of looks adaptation, first mounting groove (3) inside is equipped with first mounting panel (7), first mounting panel (7) bottom rotation is connected with a plurality of universal pulleys (8), lead screw nut sleeve (6) one end fixedly connected with limiting plate (9), a plurality of first limiting grooves (10) have all been seted up to limiting plate (9) surface equidistance, two second mounting groove (11) have all been seted up to supporting leg (2) inside, second mounting groove (11) inside is equipped with second mounting panel (12), lead screw nut sleeve (6) bottom fixedly connected with locating piece (13).

2. The stable supporting structure of upright piano according to claim 1, characterized in that: the screw nut sleeve (6) is characterized in that first sliding blocks (14) are symmetrically and fixedly connected to the outer wall of the screw nut sleeve (6), first sliding grooves matched with the first sliding blocks (14) are formed in the two supporting legs (2), the screw nut sleeve (6) is slidably connected with the supporting legs (2) through the first sliding blocks (14), and first positioning grooves (15) matched with the positioning blocks (13) are formed in the tops of the first mounting plates (7).

3. The stable supporting structure of upright piano according to claim 1, characterized in that: two second sliding blocks (16) are symmetrically and fixedly connected to the outer wall of the first mounting plate (7), second sliding grooves (17) matched with the second sliding blocks (16) are formed in the supporting legs (2), the first mounting plate (7) is in sliding connection with the second sliding grooves (17) through the second sliding blocks (16), and first through grooves (18) are formed in the bottoms of the two supporting legs (2).

4. A stable supporting structure of an upright piano according to claim 3, wherein: the bottoms of the two second sliding blocks (16) are fixedly connected with first springs (19), and the bottoms of the first springs (19) are fixedly connected with supporting legs (2).

5. The stable supporting structure of upright piano according to claim 1, characterized in that: two equal threaded connection in supporting leg (2) has threaded rod (20), the one end that second mounting panel (12) was kept away from to threaded rod (20) extends to supporting leg (2) outside, the threaded rod (20) other end extends to inside second mounting groove (11), threaded rod (20) are connected with second mounting panel (12) rotation, second mounting panel (12) are close to the one end equidistance fixedly connected with a plurality of first stopper (21) with first spacing groove (10) looks adaptation of first spacing groove (10).

6. The stable supporting structure of upright piano according to claim 1, characterized in that: the second mounting grooves (11) are communicated with the first mounting grooves (3), second limiting grooves (22) matched with the second mounting plates (12) are formed in the two supporting legs (2), and the second mounting plates (12) are slidably connected with the supporting legs (2) through the second limiting grooves (22).

7. The stable supporting structure of upright piano according to claim 1, characterized in that: the novel sliding plate is characterized in that a sliding plate (23) is arranged inside the first mounting groove (3), an adjusting plate (24) is fixedly connected to the bottom of the sliding plate (23), a supporting plate (25) is slidably connected to the inside of the sliding plate (23), second through grooves (26) are formed in the surfaces of the supporting legs (2), and third limit grooves (27) matched with the supporting plate (25) are formed in the supporting legs (2).

8. The stable supporting structure of upright piano of claim 7, wherein: the sliding plate (23) outer wall symmetry fixedly connected with two third sliders (28), two third spouts (29) with third slider (28) looks adaptation have all been seted up to supporting leg (2) inside, two third slider (28) bottom all fixedly connected with second spring (30), second spring (30) bottom and supporting leg (2) fixed connection.

9. The stable supporting structure of upright piano of claim 7, wherein: the utility model discloses a support leg, including backup pad (25) outer wall fixedly connected with second stopper (31), second constant head tank (32) with locating piece (13) looks adaptation have been seted up at backup pad (25) top, first storage tank (33) have been seted up to backup pad (25) inside, first storage tank (33) inside is equipped with pull rod (37), internal thread (34) have been seted up to first storage tank (33) inner wall, two second storage tank (35) with pull rod (37) looks adaptation have all been seted up on supporting leg (2) surface.

10. The stable supporting structure of upright piano of claim 9, wherein: one end of the pull rod (37) is fixedly connected with a connector (36) matched with the internal thread (34), the outer wall size of the pull rod (37) is matched with the inner wall size of the second storage groove (35), and the connector (36) is in threaded connection with the internal thread (34).