CN211957074U - Three-pedal integrated piano pedal device - Google Patents

Abstract

The utility model discloses a three-pedal integrated piano pedal device, which comprises a base, wherein the top of the base is provided with a mute pedal, a delay pedal and a rear delay pedal; the soft pedal and the rear sound-delaying pedal respectively comprise alloy bases, an assembly notch is formed in one end of each alloy base, a supporting seat is installed at the top of the other end of each alloy base, an external ejector rod is connected to the outer side of one side of each movable hole, and the outer side of the other side of each movable hole movably penetrates through the first movable disc through a roller shaft; the utility model discloses a pedal exerts pressure for the delay footboard, and the second is stepped on the power pole and is leaned on, thereby drive second U-shaped fixing clip, the second fore-set, second pressure spring, and cooperate the second screw rod, make pressure spring receive the compression, and produce the bounce, make the delay footboard reset, in the course of operation of delay footboard, and make the second screw rod that extends to the outside pass through outside ejector pin and piano body coupling, thereby accomplish the control of delay effect, and obtain the purpose of realization.

Description

Three-pedal integrated piano pedal device

Technical Field

The utility model relates to a piano auxiliary assembly technical field, in particular to three step on integral type piano pedal device.

Background

The piano has the assembly fittings of a left pedal, a middle pedal and a right pedal (such as a pedal structure with a Zhujiang piano model and a Zhujiang Deluo D122 pedal structure and an internal structure display), the middle pedal has the function of weakening sound, the pedal is frequently used in family practice, and the influence on four neighbors is avoided; the left pedal is also called a mute pedal or a soft pedal, and can mute the volume and change the tone; the right pedal is also called a strong pedal, and can prolong the music and enhance the sound effect; however, in the production of the traditional piano, the piano accessory pedals are arranged inside the piano body (as shown in the model of Zhujiang Deluoyi D122), the pedals are of a built-in hidden design structure, and the pedals are assembled on the piano body in a split structure, so that the piano body needs to be disassembled in the maintenance process, and the pedal device does not have flexibility in replacing or maintaining the pedal device; simultaneously, traditional piano is pedaled does not adjust the design function of pedal dynamics, even can improve the design, also exists in the customization technology of the whole preparation of piano, does not have the adjustability that the later stage was used to children and adult.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to overcome the drawbacks of the prior art, and to provide a three-pedal integrated piano pedal device, wherein a soft pedal and a rear extension pedal are fixedly connected to one end of the bottom of a pedal rod, and are fixed inside an assembly gap by a bottom rotating shaft of the pedal rod, so that the soft pedal and the rear extension pedal have position fixity, and the pedal rod can have fixity positioned at the assembly gap, and can also have a rotation inclination angle, and one end of a second pedal rod connected with the extension pedal is fixed to one end of a second alloy base, so that one end of the second alloy base is injection-molded with a second assembly gap, a second extension bolt is arranged inside the second assembly gap, and two ends of the second extension bolt penetrate through a side wall of the second alloy base, thereby completing the second rotating shaft penetrate through the second pedal rod, the second pedal force rod is fixed at one end of the second alloy base, the position is fixed, and the process of rotating and inclining can be carried out; in the process that the foot applies force to the mute pedal and the rear delay pedal, the pedal force rod inclines to one side, so that the second movable disc, the tension rod, the first movable disc, the rotating arm, the positioning hole, the movable hole, the cap rod and the fixed flitch complete the process of stressed arc motion, the external ejector rod is driven to operate, the other end connected with the external ejector rod is applied with force, and the purpose of the mute and rear delay force application control process is completed; the concave through hole of cooperation supporting seat upper end, the central authorities of concave through hole run through the screw rod, the screw rod runs through pressure spring, the one end of screw rod runs through the concave through hole, and extend to the outside, the one end that the other end of connection at the screw rod is fixed in the fore-set, the other end of fore-set is fixed in the U-shaped fixing clip, the U-shaped fixing clip passes through the bolt fastening in the both sides of pedal force pole, the top of pedal force pole is fixed with the running-board, the bottom of pedal force pole is fixed in the inboard of equipment breach through the pivot, the inside of pivot is hollow cavity structure, and the inside of hollow cavity structure runs through lengthening bolt, reach behind the effect of weak tone footboard and the effect of delaying sound footboard, through the screw rod, concave through hole, pressure spring, the fore-set pole has the rebound return stroke process, make the weak tone footboard, through the, The pedal force of the delay pedal and the pedal force of the rear delay pedal are changed, so that a piano player can adjust the pedal force by himself, the piano pedal device is selective for children and adults, and the whole piano pedal device can be detached and installed and has a structure adjusting function; exert pressure for the damper pedal through pedal, the second is stepped on the power pole and is leaned on, thereby drive second U-shaped fixing clip, the second fore-set, second pressure spring, and cooperate the second screw rod, make pressure spring receive the compression, and produce the bounce, make the damper pedal reset, in the course of operation of damper pedal, and make the second screw rod that extends to the outside pass through outside ejector pin and piano body coupling, thereby accomplish the control of damper effect, and obtain the purpose of realization, reach and pedal the pedal device of integral type piano through this three and make the piano that mutually supports the connection have the mute, damper and the back damper efficiency.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to a three-pedal integrated piano pedal device, which comprises a base, wherein the top of the base is provided with a mute pedal, a delay pedal and a rear delay pedal;

the soft pedal and the rear prolonged pedal both comprise alloy bases, one end of each alloy base is provided with an assembly notch, the top of the other end of each alloy base is provided with a supporting seat, one side of the middle part of each alloy base is provided with a bolt through hole, the outer side of each bolt through hole is provided with a fixed flitch, each fixed flitch penetrates through the body of the corresponding fixed flitch through a bolt and is fixed inside the corresponding bolt through hole, the top of each fixed flitch is provided with a fixed hole, the inside of each fixed hole penetrates through a cap rod, the other end of each cap rod is connected with a rotating arm, each rotating arm comprises a positioning hole and a movable hole, the positioning hole is sleeved at the other end of the cap rod, the outer side of one side of each movable hole is connected with an external ejector rod, the outer side of the other side of each movable hole penetrates through a first movable disc through the movement of a roller shaft, and a tension rod is, the other end of the tension rod is welded with a second movable disc, and the second movable disc is connected to one side of the treading rod through a roll shaft; the upper end of the supporting seat is provided with a concave through hole, the center of the concave through hole is penetrated through by a screw rod, the screw rod is penetrated through a pressure spring, one end of the screw rod is penetrated through the concave through hole and extends to the outside, the other end of the screw rod is fixed at one end of a top post, the other end of the top post is fixed on a U-shaped fixing clamp, the U-shaped fixing clamps are fixed at two sides of the pedal rod through bolts, a pedal plate is fixed at the top of the pedal rod, the bottom of the pedal rod is fixed at the inner side of the assembling gap through a rotating shaft, the rotating shaft is of a hollow cavity structure, and an extension bolt penetrates through the hollow cavity structure;

the damper pedal comprises a second alloy base, a second assembly notch is formed in one end of the second alloy base in an injection molding mode, a second lengthened bolt is arranged inside the second assembly notch, two ends of the second lengthened bolt penetrate through the side wall of the second alloy base, a reinforcing iron sheet is arranged on the outer side of the side wall of the second alloy base, two sides of the reinforcing iron sheet penetrate through the reinforcing bolt, the middle of the second lengthened bolt penetrates through the inside of a second rotating shaft, and the inside of the second rotating shaft is of a cavity structure; the second rotating shaft penetrates through the second pedal force rod, the second supporting seat is installed at the top of the second alloy base, a second concave through hole is formed in the upper end portion of the second supporting seat, a reinforcing seat is welded to one end of the second supporting seat, the other end of the reinforcing seat is welded to the top of the second alloy base through a connecting piece, a second screw rod penetrates through the second concave through hole, a second pressure spring is sleeved on the outer side of the second screw rod, a second ejection column is fixedly connected to one end of the second pressure spring, a second U-shaped fixing clamp is connected to one end of the second ejection column, the second U-shaped fixing clamp is buckled on the two sides of the second pedal force rod, and a second pedal plate is installed at the top of the second pedal force rod.

As an optimized technical solution of the utility model, the mute pedal, the sustain pedal and the back sustain pedal are arranged to the opposite side in proper order by one side of base.

As an optimal technical scheme of the utility model, the fixed plate has all been welded to the both ends bottom of alloy base and second alloy base.

As a preferred technical scheme of the utility model, both ends of the fixing plate are provided with threaded through holes; the top of the base is provided with a plurality of threaded through holes in a chiseling mode.

As a preferred technical scheme of the utility model, the reinforcing bolt runs through the reinforcing iron sheet body, and is fixed in the lateral wall of second alloy base.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model fixedly connects the mute pedal and the rear delay pedal to one end of the bottom of the pedal force rod, and the mute pedal and the rear delay pedal are fixed inside the assembly gap through the bottom rotating shaft of the pedal force rod, so that the mute pedal and the rear delay pedal have position fixity, and the pedal force rod has the fixity of being positioned in the assembly gap, and the mute pedal and the rear delay pedal have the rotation inclination angle, meanwhile, one end of a second pedal force rod connected with the damper pedal is fixed to one end of a second alloy base, a second assembly notch is formed in one end of the second alloy base in an injection molding mode, a second lengthened bolt is arranged inside the second assembly notch, two ends of the second lengthened bolt penetrate through the side wall of the second alloy base, a second rotating shaft penetrates through the second pedal force rod, the second pedal force rod is fixed to one end of the second alloy base, the position is fixed, and the rotating and inclining process can be carried out; in the process that the foot applies force to the mute pedal and the rear delay pedal, the pedal force rod inclines to one side, so that the second movable disc, the tension rod, the first movable disc, the rotating arm, the positioning hole, the movable hole, the cap rod and the fixed flitch complete the process of stressed arc motion, the external ejector rod is driven to operate, the other end connected with the external ejector rod is applied with force, and the purpose of the mute and rear delay force application control process is completed; the concave through hole of cooperation supporting seat upper end, the central authorities of concave through hole run through the screw rod, the screw rod runs through pressure spring, the one end of screw rod runs through the concave through hole, and extend to the outside, the one end that the other end of connection at the screw rod is fixed in the fore-set, the other end of fore-set is fixed in the U-shaped fixing clip, the U-shaped fixing clip passes through the bolt fastening in the both sides of pedal force pole, the top of pedal force pole is fixed with the running-board, the bottom of pedal force pole is fixed in the inboard of equipment breach through the pivot, the inside of pivot is hollow cavity structure, and the inside of hollow cavity structure runs through lengthening bolt, reach behind the effect of weak tone footboard and the effect of delaying sound footboard, through the screw rod, concave through hole, pressure spring, the fore-set pole has the rebound return stroke process, make the weak tone footboard, through the, The pedal dynamics of delay footboard and back delay footboard obtains changing, makes the piano player can adjust the step dynamics by oneself, all has the alternative to children and adult, and whole piano pedal device can be dismantled and the installation, has structure regulatory function.

Exert pressure for the damper pedal through pedal, the second is stepped on the power pole and is leaned on, thereby drive second U-shaped fixing clip, the second fore-set, second pressure spring, and cooperate the second screw rod, make pressure spring receive the compression, and produce the bounce, make the damper pedal reset, in the course of operation of damper pedal, and make the second screw rod that extends to the outside pass through outside ejector pin and piano body coupling, thereby accomplish the control of damper effect, and obtain the purpose of realization, reach and pedal the pedal device of integral type piano through this three and make the piano that mutually supports the connection have the mute, damper and the back damper efficiency.

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 embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of a pedal device for a piano according to the present invention;

FIG. 2 is a schematic view of the force-bearing structure of the soft pedal and the rear prolonged pedal of the present invention;

FIG. 3 is a schematic view of the assembly structure of the external push rod driven by the rotating arm;

FIG. 4 is a schematic view of the force principle of the present invention in which the rotating arm is forced to drive the external push rod;

FIG. 5 is a schematic view of a second alloy base structure connected to the damper pedal of the present invention;

fig. 6 is a schematic view of a second assembly notch of the damper pedal of the present invention.

In the figure: 1. a base; 2. a mute pedal; 3. a damper pedal; 4. a rear extension pedal; 5. an alloy base; 6. assembling the notch; 7. a supporting seat; 8. fixing the flitch; 9. a fixing hole; 10. a cap rod; 11. a rotating arm; 12. positioning holes; 13. a movable hole; 14. an external ejector rod; 15. a first movable tray; 16. a tension bar; 17. a second movable tray; 18. a pedaling rod; 19. a concave through hole; 20. a screw; 21. a pressure spring; 22. a top pillar; 23. a U-shaped fixing clip; 24. a foot pedal; 25. a rotating shaft; 26. lengthening the bolt; 27. a second alloy base; 28. a second assembly notch; 29. a second elongated bolt; 30. reinforcing iron sheets; 31. reinforcing the bolt; 32. a second rotating shaft; 33. a second pedal lever; 34. a second support seat; 35. a second concave through hole; 36. a reinforcing seat; 37. connecting sheets; 38. a second screw; 39. a second pressure spring; 40. a second top pillar; 41. a second U-shaped fixing clip; 42. a second foot pedal; 43. and (7) fixing the plate.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example 1

As shown in fig. 1-6, the utility model provides a three-pedal integrated piano pedal device, which comprises a base 1, wherein the top of the base 1 is provided with a mute pedal 2, a delay pedal 3 and a rear delay pedal 4;

the soft pedal 2 and the rear prolonged pedal 4 both comprise an alloy base 5, one end of the alloy base 5 is provided with an assembly notch 6, the top of the other end of the alloy base 5 is provided with a support seat 7, one side of the middle part of the alloy base 5 is provided with a bolt through hole, the outer side of the bolt through hole is provided with a fixed flitch 8, the fixed flitch 8 penetrates through the body of the fixed flitch 8 through a bolt and is fixed inside the bolt through hole, the top of the fixed flitch 8 is provided with a fixed hole 9, the inside of the fixed hole 9 penetrates through a cap rod 10, the other end of the cap rod 10 is connected with a rotating arm 11, the rotating arm 11 comprises a positioning hole 12 and a movable hole 13, the positioning hole 12 is sleeved at the other end of the cap rod 10, one side of the movable hole 13 is connected with an external mandril 14, the other side of the movable hole 13 movably penetrates through a first movable disc 15 through a roller shaft, the external, the other end of the tension rod 16 is welded with a second movable disc 17, and the second movable disc 17 is connected to one side of the treading rod 18 through a roll shaft; the upper end of the supporting seat 7 is a concave through hole 19, the center of the concave through hole 19 penetrates through a screw rod 20, the screw rod 20 penetrates through a pressure spring 21, one end of the screw rod 20 penetrates through the concave through hole 19 and extends to the outside, the other end of the screw rod 20 is fixed at one end of a top column 22, the other end of the top column 22 is fixed on a U-shaped fixing clamp 23, the U-shaped fixing clamp 23 is fixed at two sides of the pedal rod 18 through bolts, a pedal plate 24 is fixed at the top of the pedal rod 18, the bottom of the pedal rod 18 is fixed at the inner side of the assembly notch 6 through a rotating shaft 25, the rotating shaft 25 is of a hollow cavity structure, and the hollow cavity structure penetrates through a lengthened bolt 26;

the damper pedal 3 comprises a second alloy base 27, one end of the second alloy base 27 is injection molded with a second assembly gap 28, a second lengthened bolt 29 is arranged inside the second assembly gap 28, two ends of the second lengthened bolt 29 penetrate through the side wall of the second alloy base 27, a reinforcing iron sheet 30 is arranged outside the side wall of the second alloy base 27, two sides of the reinforcing iron sheet 30 penetrate through a reinforcing bolt 31, the middle part of the second lengthened bolt 29 penetrates through the inside of a second rotating shaft 32, and the inside of the second rotating shaft 32 is of a cavity structure; the second rotating shaft 32 penetrates through the second pedal rod 33, the second supporting seat 34 is installed at the top of the second alloy base 27, a second concave through hole 35 is formed in the upper end portion of the second supporting seat 34, a reinforcing seat 36 is welded to one end of the second supporting seat 34, the other end of the reinforcing seat 36 is welded to the top of the second alloy base 27 through a connecting sheet 37, a second screw 38 penetrates through the inside of the second concave through hole 35, a second pressure spring 39 is sleeved on the outer side of the second screw 38, a second ejection column 40 is fixedly connected to one end of the second pressure spring 39, a second U-shaped fixing clamp 41 is connected to one end of the second ejection column 40, the second U-shaped fixing clamp 41 is buckled on two sides of the second pedal rod 33, and a second pedal 42 is installed at the top of the second pedal rod 33.

The soft pedal 2, the sustain pedal 3 and the rear sustain pedal 4 are sequentially arranged from one side to the other side of the base 1, so that the piano pedal device is designed in accordance with the pedaling habit of the conventional piano pedals in the society in a stepping function classification manner.

Fixing plates 43 are welded at the bottoms of the two ends of the alloy base 5 and the second alloy base 27, and are used for fixing the alloy base 5 and the second alloy base 27 on the base 1 through the fixing plates 43.

Threaded through holes are drilled at both ends of the fixing plate 43; the top of base 1 is excavated there are a plurality of screw through-holes, runs through the screw through-hole that the both ends of fixing plate 43 were excavated and a plurality of screw through-holes that the top of base 1 was excavated through the screw, makes the mechanism that makes soft footboard 2, delay footboard 3 and back delay footboard 4 and be connected tightly fix at the top of base 1 to can accomplish and dismantle the installation, also be convenient for maintain.

The reinforcing bolt 31 penetrates through the body of the reinforcing iron sheet 30 and is fixed on the side wall of the second alloy base 27, so that the wear resistance of the second pedal lever 33 is enhanced, and the structural design is met.

Example 2

The utility model provides a three step on integral type piano pedal device, this piano pedal device's use step as follows:

step one, an alloy base 5 which is respectively included by a soft pedal 2 and a rear sound-delaying pedal 4, a second alloy base 27 which is included by a sound-delaying pedal 3 is respectively fixed on the top of a base 1, the soft pedal 2, the sound-delaying pedal 3 and the rear sound-delaying pedal 4 are sequentially arranged from one side to the other side of the base 1 and are fixedly installed, a fixing plate 43 is respectively welded at the bottoms of the two alloy bases 5 which are respectively included by the soft pedal 2 and the rear sound-delaying pedal 4 and the bottom of the second alloy base 27, and the alloy base 5 and the second alloy base 27 are fixed by penetrating through threaded through holes which are respectively chiseled at two ends of the fixing plate 43 and a plurality of threaded through holes which are chiseled at the top of the base 1 through screws;

step two: one end of the bottom of a pedal force rod 18 fixedly connecting the soft pedal 2 and the rear prolonged pedal 4 is fixed on the inner side of the assembly gap 6 through the bottom of the pedal force rod 18 through a rotating shaft 25, the rotating shaft 25 is internally of a hollow cavity structure, and the hollow cavity structure is internally penetrated through by a lengthening bolt 26, so that the soft pedal 2 and the rear prolonged pedal 4 have position fixity and can complete the angle rotation process; one end of a second pedal lever 33 connected with the damper pedal 3 is fixed at one end of a second alloy base 27, so that a second assembly gap 28 is formed at one end of the second alloy base 27 in an injection molding mode, a second lengthened bolt 29 is arranged inside the second assembly gap 28, two ends of the second lengthened bolt 29 penetrate through the side wall of the second alloy base 27, a reinforcing iron sheet 30 is arranged outside the side wall of the second alloy base 27, two sides of the reinforcing iron sheet 30 penetrate through reinforcing bolts 31, the middle part of the second lengthened bolt 29 penetrates through the inside of a second rotating shaft 32, the inside of the second rotating shaft 32 is of a cavity structure, the second rotating shaft 32 penetrates through the second pedal lever 33, so that the second pedal lever 33 is fixed at one end of the second alloy base 27, the position is fixed, and the rotating process can be carried out;

step three, a supporting seat 7 is arranged at the top of the other end of an alloy base 5 which is respectively included by a soft pedal 2 and a rear prolonged pedal 4, a bolt through hole is drilled at one side of the middle part of the alloy base 5, a fixed flitch 8 is arranged at the outer side of the bolt through hole, the fixed flitch 8 penetrates through the body of the fixed flitch 8 through a bolt and is fixed inside the bolt through hole, a fixed hole 9 is drilled at the top of the fixed flitch 8, the inside of the fixed hole 9 penetrates through a cap rod 10, the other end of the cap rod 10 is connected with a rotating arm 11, the rotating arm 11 comprises a positioning hole 12 and a movable hole 13, the positioning hole 12 is sleeved at the other end of the cap rod 10, an external ejector rod 14 is connected at the outer side of one side of the movable hole 13, the outer side of the other side of the movable hole 13 movably penetrates through a first movable disc 15 through a roller shaft, a tension rod 16 is welded at the outer part, the second movable disc 17 is connected with one side of the treading rod 18 through a roll shaft; in the process that the foot applies force to the soft pedal 2 and the rear prolonged pedal 4, the pedal force rod 18 inclines to one side, so that the second movable disc 17, the tension rod 16, the first movable disc 15, the rotating arm 11, the positioning hole 12, the movable hole 13, the cap rod 10 and the fixed flitch 8 finish the process of stressed arc motion, the external ejector rod 14 is driven to operate, the other end (a key system with functions of soft sound, prolonged sound and rear prolonged sound, which is the prior art and is not described in detail in the invention) connected with the external ejector rod 14 is subjected to force, and the purpose of the force application process of the soft sound and the rear prolonged sound is finished; the upper end of the matching supporting seat 7 is a concave through hole 19, the center of the concave through hole 19 penetrates through a screw rod 20, the screw rod 20 penetrates through a pressure spring 21, one end of the screw rod 20 penetrates through the concave through hole 19 and extends to the outside, the other end of the screw rod 20 is connected and fixed at one end of a top column 22, the other end of the top column 22 is fixed on a U-shaped fixing clamp 23, the U-shaped fixing clamp 23 is fixed at two sides of a pedal rod 18 through bolts, a pedal plate 24 is fixed at the top of the pedal rod 18, the bottom of the pedal rod 18 is fixed at the inner side of an assembly notch 6 through a rotating shaft 25, the rotating shaft 25 is of a hollow cavity structure, and the hollow cavity structure penetrates through an extension bolt 26, so that after the weak tone pedal 2 and the rear delay tone pedal 4 are acted by force, the screw rod 20, the concave through hole 19, the pressure spring 21, the top column, the pedal force rod 18 has a rebound return process, and the pedal force of the mute pedal 2, the damper pedal 3 and the rear damper pedal 4 is changed by changing the specification of the pressure spring 21;

and step four, pressing the damper pedal 3 by pedaling, inclining the second pedaling force rod 33 to drive the second U-shaped fixing clamp 41, the second ejection column 40 and the second pressure spring 39, and matching with the second screw rod 38 to compress the pressure spring 39 and generate rebound force to reset the damper pedal 3, wherein in the working process of the damper pedal 3, the second screw rod 38 extending to the outside is connected with the piano body through the external ejector rod 14 to complete the damper effect realization process, and the piano matched and connected with each other has the effects of mute, damper and post damper through the three-pedal integrated piano pedal device.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A three-pedal integrated piano pedal device comprises a base (1), and is characterized in that a mute pedal (2), a delay pedal (3) and a rear delay pedal (4) are arranged at the top of the base (1);

the mute pedal (2) and the rear delay pedal (4) both comprise alloy bases (5), one end of each alloy base (5) is provided with an assembly notch (6), the top of the other end of each alloy base (5) is provided with a supporting seat (7), one side of the middle of each alloy base (5) is provided with a bolt through hole, the outer side of each bolt through hole is provided with a fixing pasting plate (8), each fixing pasting plate (8) penetrates through a body of each fixing pasting plate (8) through a bolt and is fixed inside the corresponding bolt through hole, the top of each fixing pasting plate (8) is provided with a fixing hole (9), the inside of each fixing hole (9) penetrates through a cap rod (10), the other end of each cap rod (10) is connected with a rotating arm (11), each rotating arm (11) comprises a positioning hole (12) and a movable hole (13), each positioning hole (12) is sleeved at the other end of each cap rod (10), an external ejector rod (14) is connected to the outer side of one side of the movable hole (13), the outer side of the other side of the movable hole (13) movably penetrates through a first movable disc (15) through a roller shaft, a tension rod (16) is welded to the outside of the first movable disc (15), a second movable disc (17) is welded to the other end of the tension rod (16), and the second movable disc (17) is connected to one side of a treading rod (18) through the roller shaft; the upper end of the supporting seat (7) is provided with a concave through hole (19), the center of the concave through hole (19) penetrates through a screw rod (20), the screw rod (20) penetrates through the pressure spring (21), one end of the screw rod (20) penetrates through the concave through hole (19), and extends to the outside, the other end of the screw rod (20) is fixed at one end of the top column (22), the other end of the top column (22) is fixed on a U-shaped fixing clip (23), the U-shaped fixing clip (23) is fixed on two sides of the treading rod (18) through bolts, a pedal (24) is fixed at the top of the pedal lever (18), the bottom of the pedal lever (18) is fixed at the inner side of the assembly notch (6) through a rotating shaft (25), the interior of the rotating shaft (25) is of a hollow cavity structure, and the interior of the hollow cavity structure penetrates through the lengthened bolt (26);

the damper pedal (3) comprises a second alloy base (27), a second assembly notch (28) is formed in one end of the second alloy base (27) in an injection molding mode, a second lengthening bolt (29) is arranged inside the second assembly notch (28), two ends of the second lengthening bolt (29) penetrate through the side wall of the second alloy base (27), a reinforcing iron sheet (30) is arranged on the outer side of the side wall of the second alloy base (27), two sides of the reinforcing iron sheet (30) penetrate through reinforcing bolts (31), the middle of the second lengthening bolt (29) penetrates through the inside of a second rotating shaft (32), and the inside of the second rotating shaft (32) is of a cavity structure; the second rotating shaft (32) penetrates through the second pedal force rod (33), the second alloy base (27) is provided with a second supporting seat (34) at the top, the upper end of the second supporting seat (34) is provided with a second concave through hole (35), one end of the second supporting seat (34) is welded with a reinforcing seat (36), the other end of the reinforcing seat (36) is welded at the top of the second alloy base (27) through a connecting sheet (37), the inside of the second concave through hole (35) penetrates through a second screw rod (38), the outer side of the second screw rod (38) is sleeved with a second pressure spring (39), one end of the second pressure spring (39) is fixedly connected with a second ejection column (40), one end of the second ejection column (40) is connected with a second U-shaped fixing clamp (41), and the second U-shaped fixing clamp (41) is buckled at two sides of the second pedal force rod (33), and a second pedal (42) is mounted at the top of the second pedal lever (33).

2. The pedal apparatus for a triple-pedal integrated piano as claimed in claim 1, wherein said soft pedal (2), sustain pedal (3) and rear sustain pedal (4) are sequentially arranged from one side to the other side of said base (1).

3. The pedal apparatus for a triple-pedal one-piece piano as claimed in claim 1, wherein fixing plates (43) are welded to bottoms of both ends of the alloy base (5) and the second alloy base (27).

4. A pedal device for a three-pedal integrated piano as defined in claim 3, wherein both ends of said fixing plate (43) are bored with screw through-holes; the top of the base (1) is provided with a plurality of threaded through holes.

5. The pedal apparatus for a triple-pedal one-piece piano according to claim 1, wherein the reinforcing bolt (31) penetrates through the body of the reinforcing iron piece (30) and is fixed to the side wall of the second alloy base (27).

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