Grand piano linkage device convenient to adjust

Abstract

The grand piano linkage device convenient to adjust comprises a base, a staple bolt seat, a compound vibration rod, an ejector rod, a compound vibration torsion spring and an installation seat, the base comprises a base transverse rod and a base vertical rod, the middle section of the base vertical rod protrudes to form a base positioning part, the first end of the compound vibration rod is rotationally connected with the upper end of the base vertical rod through a pin shaft, and the second end of the compound vibration rod is rotationally connected with the upper end of the base vertical rod through a pin shaft. A torsion spring adjusting screw hole is formed in the position, close to the first end of the compound vibration rod, of the compound vibration rod, the torsion spring adjusting screw is installed in the torsion spring adjusting screw hole, the compound vibration rod adjusting screw penetrates through a compound vibration rod adjusting through hole in the compound vibration rod and then is connected with a corresponding screw hole in the base positioning part, and two torsion arms of the compound vibration torsion spring comprise the long torsion arm and the short torsion arm. The short torsion arm is arranged in a positioning groove in the compound vibration rod, and the suspended end of the short torsion arm makes contact with the end of the torsion spring adjusting screw. The size of the linkage device is reduced, normal work of other parts is facilitated, the swing resistance of the compound vibration rod and the resistance of pressing the keys are reduced, and the torsion of the compound vibration torsion spring can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a piano linkage especially to a triangular piano linkage convenient to adjust. BACKGROUND

[0002] The triangular piano is a kind of large piano for large-scale performance or professional, and its linkage is the linkage component between keys (i.e. piano keyboard), which can transmit the force exerted on the key by the performer to the hammer to hit the string to produce sound, and is one of the important components of the triangular piano.

[0003] The basic structure of the triangular piano linkage includes a base, a clamping seat, a shock absorber, a top rod, a shock absorber torsion spring and a mounting seat, the base includes a base horizontal rod and a base vertical rod formed integrally, the lower end of the base vertical rod is connected to the middle part of the upper surface of the base horizontal rod, the middle section of the base vertical rod is transversely protruded to form a base positioning part, the clamping seat is connected to the middle part of the lower surface of the base horizontal rod, the mounting seat is rotatably connected to one end of the base horizontal rod, the shock absorber is rotatably connected to the upper end of the base vertical rod through a pin shaft, a shock absorber adjusting screw for limiting the rotating swing range of the shock absorber is installed between the shock absorber and the base positioning part, the top rod is formed integrally by a long arm and a short arm, the corner part of the top rod is rotatably connected to the other end of the base horizontal rod, the end of the long arm is placed in the corresponding through hole of the shock absorber, the shock absorber torsion spring is sleeved on the pin shaft, one torsion arm of the shock absorber torsion spring is placed in the positioning groove in the shock absorber, and the other torsion arm is connected to the position on the long arm close to the corner part of the top rod, and a top rod adjusting screw for limiting the rotating swing range of the top rod is installed between the middle part of the long arm and the base positioning part. When working, the user presses one end of the key of the piano, the other end of the key is raised upward, drives the clamping seat and the base to rotate and swing upward, the shock absorber pushes the drum wheel and the hammer rod of the piano to move upward together, then the end of the shock absorber close to the lock hanger of the piano is blocked by the rebound adjusting screw on the upper end of the lock hanger, the shock absorber is separated from the drum wheel, at the same time, the suspended end of the long arm of the top rod just contacts the lower surface of the drum wheel and pushes it to move upward quickly, then the shock absorber and the top rod are reset quickly, the drum wheel pushes the hammer of the piano to move upward quickly through the hammer rod and is reset quickly, the hammer moves upward quickly to hit the string of the piano and is reset quickly, the string is hit and vibrated instantly to produce the sound of the piano, and the function of converting the action of pressing the key into the sound of the piano is realized.

[0004] The traditional triangular piano linkage has the following defects:

[0005] First, the middle part of the complex shock rod is connected with the upper end of the base vertical rod through a pin shaft rotation, the complex shock rod adjusting screw and the end of the complex shock rod close to the lock are respectively located on the two sides of the pin shaft, in the swinging process of the complex shock rod, the two ends of the complex shock rod move in the vertical direction reversely, so that a larger moving space is occupied, thereby increasing the product volume, or the size of other components needs to be reduced, which may affect the normal function of other components; meanwhile, the two torsion arms of the complex shock torsion spring are long arms, the torsion arm in the complex shock rod repeatedly rubs the groove wall of the positioning groove in the swinging process of the complex shock rod, thereby increasing the resistance of the complex shock rod swinging, and also increasing the resistance of pressing the piano key, reducing the comfort of playing the piano; meanwhile, the size of the torsion of the complex shock torsion spring cannot be adjusted, which has an influence on the reset speed of the linkage and the playing feeling of the piano.

[0006] Second, the convex strip on the clamping pin seat and the positioning groove of the base horizontal rod are consistent in size, which is a unique matching structure, the relative position between the two cannot be adjusted, that is, the transmission amplification ratio of the linkage cannot be adjusted, which limits the application effect of the grand piano, and causes the linkage to be unable to adapt to various pianos.

[0007] Third, the suspended end of the long arm of the top rod is square, and the friction between the square and the drum wheel is large, which causes the reset speed of the top rod to be slow, and reduces the transmission sensitivity.

[0008] Fourth, the traditional linkage adopts a wooden structure, which has small strength, large mass, is easy to deform, and has larger deformation when being wet, reduces the transmission effect and has low service life. Practical new type content

[0009] The purpose of the present application is to provide a grand piano linkage convenient to adjust.

[0010] The present application achieves the above-mentioned purposes through the following technical solutions:

[0011] The utility model provides a kind of easily adjusted grand piano linkage, including base, stud seat, shock absorber, top rod, shock absorber torsion spring and mounting seat, the base includes integrally formed base crossbar and base vertical rod, the lower end of the base vertical rod is connected with the upper middle part of the base crossbar, the mounting seat is rotatably connected with one end of the base crossbar, the middle segment of the base vertical rod is protruded to form base positioning part, the stud seat is connected with the lower middle part of the base crossbar, the shock absorber is rotatably connected with the upper end of the base vertical rod by pin shaft, the top rod of the "L" shape is connected by top rod long arm and top rod short arm and integrally formed, the corner part of the top rod is rotatably connected with the other end of the base crossbar, the shock absorber torsion spring is sleeved on the pin shaft, the first end in the both ends of the shock absorber is rotatably connected with the upper end of the base vertical rod by the pin shaft, the position of the shock absorber near the second end in the both ends is equipped with top rod limiting through-hole and the overhanging end of the top rod long arm is placed in the top rod limiting through-hole, the position of the shock absorber near the first end is equipped with torsion spring adjusting screw hole and torsion spring adjusting screw is installed in the torsion spring adjusting screw hole, the position of the shock absorber between the torsion spring adjusting screw hole and the top rod limiting through-hole is equipped with shock absorber adjusting through-hole, the base positioning part is protruded to the transverse side close to the second end of the shock absorber, after the shock absorber adjusting screw passes through the shock absorber adjusting through-hole, it is connected with the corresponding screw hole on the base positioning part, the two torsion arms of the shock absorber torsion spring are a long torsion arm and a short torsion arm, the long torsion arm is connected with the position of the top rod long arm close to the corner part of the top rod, the short torsion arm is placed in the positioning groove in the shock absorber and its overhanging end is in contact with the end of the torsion spring adjusting screw.

[0012] As preferred, in order to adjust the relative position between stud seat and base crossbar as needed during assembly to adjust the transmission amplification ratio of linkage, improve the adaptability of linkage to various pianos, the middle segment of the lower surface of the base crossbar is provided with strip-shaped positioning groove, the upper surface of the stud seat is provided with protruding positioning strip, the length of the strip-shaped positioning groove is greater than the length of the positioning strip, and the positioning strip is placed in the strip-shaped positioning groove and connected with each other by mutual adhesion.

[0013] As preferred, in order to reduce the friction between the overhanging end of top rod long arm and drum wheel of piano to speed up the reset speed of top rod and improve transmission sensitivity, the surface of the overhanging end of the top rod long arm is circular arc surface and is coated with molybdenum disulfide or graphite.

[0014] As preferred, in order to increase strength and reduce mass to improve transmission effect and prolong service life, the base is resin carbon fiber composite material base, and the base is provided with hollow structure.

[0015] The utility model has the advantages that:

[0016] This invention shortens the resonant rod and rotatably connects one end to the upper end of the base vertical rod, reducing the vertical movement space required for the resonant rod to rotate and swing. This reduces the size of the linkage and facilitates the normal operation of other components. The two torque arms of the resonant torsion spring are designed as a long and short structure. Without affecting the original function, the friction between the short torque arm and the inner positioning groove wall of the resonant rod is reduced during operation. This reduces the resistance to the swing of the resonant rod and the resistance to pressing the piano keys, improving the playing comfort. Furthermore, the torque of the resonant torsion spring can be adjusted by the torsion spring adjusting screw, which helps to improve the reset speed of the linkage and enhance the playing feel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the adjustable grand piano linkage described in this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the top rod of the easily adjustable grand piano linkage described in this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the resonator rod of the easily adjustable grand piano linkage described in this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the base crossbar of the easily adjustable grand piano linkage described in this utility model, shown from a downward angle.

[0021] Figure 5 This is a three-dimensional structural diagram of the pin holder of the adjustable grand piano linkage described in this utility model, shown from a top view.

[0022] Figure 6 This is a schematic diagram of the main structure of the easily adjustable grand piano linkage described in this utility model during application. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figures 1-5As shown in the utility model discloses a convenient to adjust's three grand piano linkage ware includes base, clamping nail seat 2, complex shock bar 11, top rod, complex shock torsion spring 26 and mounting seat 1, the base includes integrally formed base cross bar 4 and base vertical bar 5, and the lower end of base vertical bar 5 is connected with the upper middle part of base cross bar 4, and mounting seat 1 is rotatably connected with one end of base cross bar 4, and the middle section of base vertical bar 5 is formed with base positioning portion 10, and clamping nail seat 2 is connected with the lower middle part of base cross bar 4, and the upper end of base vertical bar 5 is rotatably connected with complex shock bar 11 through pin shaft 6, and the top rod is integrally formed by the connection of top rod long arm 14 and top rod short arm 17, and the corner portion of top rod is rotatably connected with the other end of base cross bar 4, and complex shock torsion spring 26 is sleeved on pin shaft 6, and the first end of complex shock bar 11 is rotatably connected with the upper end of base vertical bar 5 through pin shaft 6, and pin shaft 6 passes through the pin hole 24 of the first end of complex shock bar 11 and the corresponding through hole of the upper end of base vertical bar 5, and the position of complex shock bar 11 close to the second end of its two ends is provided with top rod limiting through hole 21, and the overhanging end portion 18 of top rod long arm 14 is arranged in the top rod limiting through hole 21, and the position of complex shock bar 11 close to the first end thereof is provided with torsion spring adjusting screw hole 23, and torsion spring adjusting screw 7 is arranged in the torsion spring adjusting screw hole 23, and the position of complex shock bar 11 between torsion spring adjusting screw hole 23 and top rod limiting through hole 21 is provided with complex shock bar adjusting through hole 22, and base positioning portion 10 is protruded to the transverse side close to the second end of complex shock bar 11, and complex shock bar adjusting screw 8 is connected with the corresponding screw hole (not visible in the drawing) on base positioning portion 10 after passing through complex shock bar adjusting through hole 22, and the two torsion arms of complex shock torsion spring 26 are a long torsion arm 16 and a short torsion arm 25, and long torsion arm 16 is connected with the connecting hole 20 of top rod long arm 14 close to the corner portion of top rod, and short torsion arm 25 is arranged in the positioning groove 27 in complex shock bar 11 and the overhanging end portion thereof is in contact with the end portion of torsion spring adjusting screw 7. The above-mentioned complex shock torsion spring 26 is generally processed by steel wire (or other metal strip), and the middle section of the steel wire forms a spiral structure, and the sections close to the two ends are straight sections, and the two straight sections are the two torsion arms.

[0025] As Figures 1-5 The utility model discloses the following multiple more optimal specific structures are disclosed:

[0026] In order to adjust the relative position between clamping nail seat 2 and base cross bar 4 according to the need in the assembly process to adjust the transmission amplification ratio of linkage ware, improve the adaptability of linkage ware to various pianos, the middle section of the lower surface of base cross bar 4 is provided with strip positioning groove 28, and the upper surface of clamping nail seat 2 is provided with protruding positioning strip 29, the length of strip positioning groove 28 is greater than the length of positioning strip 29, and positioning strip 29 is arranged in strip positioning groove 28 and is connected with each other by adhesion.

[0027] In order to reduce the overhanging end portion 18 of top rod long arm 14 and the drum wheel of piano (refer to Figure 6The friction between the drum wheel 34 and the surface of the suspended end 18 of the long arm 14 of the jack is used to accelerate the reset speed of the jack and improve the transmission sensitivity. The surface of the suspended end 18 of the long arm 14 of the jack is arc-shaped and coated with molybdenum disulfide or graphite.

[0028] In order to increase the strength, reduce the mass, improve the transmission effect and prolong the service life, the base is made of resin carbon fiber composite material, and the base is provided with a hollow structure.

[0029] Figure 1 And Figure 5 The card nail seat cotton pad 3 is also shown in the figure, which is attached to the lower part of the card nail seat 2. Figure 1 The shock absorber rod soundproofing cotton pad 9 is also shown in the figure, which is attached to the base positioning part 10, and the shock absorber rod adjusting screw 8 passes through the corresponding through hole of the shock absorber rod soundproofing cotton pad 9. The jack adjusting screw 15, which is used to limit the rotating swing range of the jack, passes through the corresponding through hole of the jack soundproofing cotton pad 12, which is attached to the base positioning part 10. Figure 2 The jack adjusting screw 15 passes through the corresponding through hole of the jack soundproofing cotton pad 12, which is attached to the base positioning part 10, and the shock absorber rod soundproofing cotton pad 13 is attached to the upper surface of the second end of the shock absorber rod 11. These structures are all conventional adaptive structures.

[0030] As shown in the figure, Figures 1-6 When in use, the entire linkage is connected with the linkage frame 33 through the mounting seat 1 and the fixing screw 31, the linkage frame 33 is connected with the key 37, the lock hanger 35 is located near the second end of the shock absorber rod 11, the upper end of the lock hanger 35 is provided with the rebound adjusting screw 34, the rebound adjusting screw 34 is located above the shock absorber rod soundproofing cotton pad 13, the card nail 36 provided on the key 37 is located below the card nail seat 2, one end of the hammer rod 32 located above the shock absorber rod 11 is rotationally connected with the upper end of the lock hanger 35, the other end of the hammer rod 32 is connected with the plectrum 30, the drum wheel 34 is attached to the lower part of the middle segment of the hammer rod 32, and the upper part of the plectrum 30 is provided with a string (not shown in the figure). The user presses the outer end of the key 37 of the piano (not visible in the figure), the inner end of the key 37 is raised upward, the card nail 36 is moved upward, the card nail 36 pushes the card nail seat 2 and the base to rotate upward around the connection position of the base cross bar 4 and the mounting seat 1, Figure 1 and Figure 6 the second end of the shock absorber rod 11 is moved upward synchronously with the jack, when the base drives the shock absorber rod 11 to a certain height, the suspended end (upward protruding shape) of the short arm 17 of the jack contacts the lower end of the lock hanger 35, the jack stops moving upward and starts to rotate around the connection position of the jack and the base cross bar 4, Figure 1 and Figure 6When the hammer rod 32 is pushed up by the drum wheel 34, the hammer rod 32 is separated from the drum wheel 34, and the free end of the top rod long arm 14 is just rotated to the lower side of the drum wheel 34 and contacts the lower side of the drum wheel 34, the top rod long arm 14 pushes the drum wheel 34 and the hammer rod 32 to move upward quickly, and then the outer end of the key 37 is released after being pressed in place, under the action of the weight of the base and the torsion of the rebounding torsion spring 26, the base, the rebounding rod 11 and the top rod are quickly reset; at the same time, the drum wheel 34 pushes the plectrum 30 to move upward quickly through the hammer rod 32, and the plectrum 30 is quickly reset under the action of the weight of the plectrum 30, the plectrum 30 is quickly reset after moving upward quickly to hit the piano string (not shown in the figure) of the piano, the piano string is hit and vibrated instantaneously to emit the piano sound, and the function of converting the action of pressing the key 37 into the piano sound is realized; after the reset of the components is completed, the complete operation process of emitting the piano sound by pressing one key 37 is completed.

[0031] The above embodiments are only preferred embodiments of the present application, and are not a limitation on the technical solutions of the present application. Any technical solution that can be realized on the basis of the above embodiments without creative labor shall be considered to fall within the protection scope of the patent of the present application.

Claims

1. A conveniently adjustable grand piano linkage, comprising a base, a clamping seat, a shock absorber rod, a top rod, a shock absorber torsion spring and a mounting seat, the base comprising an integrally formed base horizontal rod and a base vertical rod, the lower end of the base vertical rod being connected to the middle of the upper surface of the base horizontal rod, the mounting seat being rotatably connected to one end of the base horizontal rod, the middle section of the base vertical rod being raised to form a base positioning part, the clamping seat being connected to the middle of the lower surface of the base horizontal rod, the transverse shock absorber rod being rotatably connected to the upper end of the base vertical rod through a pin shaft, the "L"-shaped top rod being integrally formed by the connection of a top rod long arm and a top rod short arm, the corner part of the top rod being rotatably connected to the other end of the base horizontal rod, the shock absorber torsion spring being sleeved on the pin shaft, characterized in that: The first end of the two ends of the complex shock rod is connected with the upper end of the base vertical rod through the pin shaft rotation, the complex shock rod is provided with a top rod limiting through hole near the second end of the two ends, and the overhanging end of the top rod long arm is arranged in the top rod limiting through hole; the complex shock rod is provided with a torsion spring adjusting screw hole near the first end, and a torsion spring adjusting screw is arranged in the torsion spring adjusting screw hole; the complex shock rod is provided with a complex shock rod adjusting through hole between the torsion spring adjusting screw hole and the top rod limiting through hole; the base positioning part is protruded to the transverse side near the second end of the complex shock rod, a complex shock rod adjusting screw is connected with the corresponding screw hole on the base positioning part after passing through the complex shock rod adjusting through hole; the two torsion arms of the complex shock spring are a long torsion arm and a short torsion arm; the long torsion arm is connected with the position near the top rod corner part of the top rod long arm; the short torsion arm is arranged in the positioning groove in the complex shock rod, and the overhanging end of the short torsion arm is in contact with the end of the torsion spring adjusting screw.

2. The easily adjustable grand piano linkage of claim 1, wherein: The middle segment of the lower surface of the base horizontal rod is provided with a strip-shaped positioning groove, the upper surface of the clamping nail seat is provided with a protruding positioning strip, the length of the strip-shaped positioning groove is greater than the length of the positioning strip, and the positioning strip is arranged in the strip-shaped positioning groove and is connected with each other by adhesion.

3. The easily adjustable grand piano linkage of claim 1 or 2, wherein: The overhanging end surface of the top rod long arm is a circular arc surface, and the surface is coated with molybdenum disulfide or graphite.

4. The easily adjustable grand piano linkage of claim 1 or 2, wherein: The base is a resin carbon fiber composite material base, and the base is provided with a hollow structure.

Images