CN212434216U

CN212434216U - Soundboard with sound beam and sound tunnel in upright piano

Info

Publication number: CN212434216U
Application number: CN202021738872.5U
Authority: CN
Inventors: 金海鸥; 吴念博; 何新喜; 朱信智; 李碧英; 杨萍
Original assignee: Suzhou Liyue Musical Instrument Co Ltd
Current assignee: Suzhou Liyue Musical Instrument Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-01-29
Anticipated expiration: 2030-08-19

Abstract

A soundboard with a sound beam and a sound tunnel in a vertical piano is characterized in that the outer wall of the soundboard is provided with a first groove and a second groove, the first groove is transversely arranged in the length direction of the soundboard, and the second groove is longitudinally arranged in the width direction of the soundboard; the two grooves are crossed and communicated with each other, and the outer wall of the sound board is divided into four resonance areas; the center of the outer wall of the soundboard is also provided with a sound beam assembly which comprises a plurality of strip-shaped sound beam components, and the strip-shaped sound beam components are arranged on two sides of the first groove and two sides of the second groove in pairs; the first groove forms a transverse sound tunnel on the outer wall of the soundboard, and the second groove forms a longitudinal sound tunnel on the outer wall of the soundboard. The utility model discloses change the soundboard into present standard vibration mode by free vibration mode in the past, solved upright piano high pitch area from the angle of vibration, sympathetic response, sound production and bright not coming out, and the low pitch area is muddy and mellow not enough problem, has especially improved to the low pitch area pronunciation. Practice proves that the improved design scheme has outstanding substantive features and remarkable technical progress.

Description

Soundboard with sound beam and sound tunnel in upright piano

Technical Field

The utility model relates to an upright piano, concretely relates to soundboard of area sound roof beam and sound tunnel in upright piano.

Background

The piano is a keyboard instrument in Western classical music and is known as the king of the instrument. It is composed of 88 keys (52 white keys, 36 black keys) and a metal string sound board.

The piano has six main structures including strings, a skeleton, soundboards, a string striking machine system, a wooden shell and pedals. The soundboard (see figure 1) is composed of a sounding board (also called a soundboard big board), a wood assistant (also called a gear), a soundboard frame and string codes. The sound board is like a thin plate, the wood aids arranged at a certain distance are adhered on the lower surface of the sound board, the sound board frame is adhered on the periphery of the sound board, and the middle and high pitch string codes and the low pitch string codes are fixed on the upper surface of the sound board. When the strings vibrate, the sound board is vibrated through the transmission of the string codes tightly attached to the sound board, and the sound board starts to work. The soundboard is one of the components that play an important role in the sound quality of a piano. The strings are vibrated and sounded after being struck by the hammer, and the soundboard bears the vibration from the strings through the transmission of the string codes to enhance the sound radiation, strengthen the original sound and broadcast the energy obtained from the vibrated strings to the air as much as possible.

The range of a piano is typically seven octaves, with the high range accounting for about half an octave, the mid range accounting for about four octaves, and the low range accounting for about two and a half octaves.

The conventional upright piano has the common problems that: when the upright piano pronounces, the sound board has a natural resonant frequency, and after the sound board exceeds a certain range of a resonant frequency region, a high pitch region cannot be lightened, and a low pitch region is not perfectly round. Especially, the tone quality of the bass region has been a short board of a piano, and even limits the creation width of the composer. The main reason for this is that the present soundboard for upright pianos cannot satisfy a good broad-band vibration from the high range to the low range, i.e., cannot simultaneously accommodate wide frequency variation resonance and vibration in the high range, the mid range and the low range. In conclusion, the sound board of the traditional upright piano is not reasonable in structural design, and is not beneficial to exerting good sound wave vibration from a high-pitch area to a low-pitch area.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims at providing a soundboard of area sound roof beam and sound tunnel in upright piano.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a soundboard with a sound beam and a sound tunnel in an upright piano is rectangular, and the inner wall of the soundboard faces to strings of the piano;

a first groove and a second groove are formed in the outer wall of the soundboard, wherein the first groove is transversely arranged in the length direction of the soundboard, and the second groove is longitudinally arranged in the width direction of the soundboard;

the first grooves and the second grooves are crossed on the outer wall of the soundboard and are communicated with each other, and the crossed points are positioned in the center of the soundboard, so that the outer wall of the soundboard is divided into four resonance areas;

the center of the outer wall of the soundboard is also provided with a sound beam assembly, the sound beam assembly comprises a plurality of strip-shaped sound beam components, and the strip-shaped sound beam components are arranged on two sides of the first groove and two sides of the second groove in pairs;

the first groove forms a transverse sound tunnel on the outer wall of the soundboard, and the second groove forms a longitudinal sound tunnel on the outer wall of the soundboard.

The relevant content in the above technical solution is explained as follows:

1. in the above scheme, the first grooves and the second grooves are crossed on the outer wall of the soundboard and are communicated with each other, so that the vibration of the strings can be transmitted to the periphery of the soundboard rapidly through the cross-shaped sound tunnel (namely the sound tunnel) formed by the grooves.

2. In the above scheme, the intersection point of the first groove and the second groove is located in the center of the soundboard so as to improve the tone quality and tone color of the soundboard.

3. In the above scheme, a connection beam is arranged between two adjacent strip-shaped sound beam components, and the connection beam spans over the first groove and the second groove to form the sound beam assembly in a groined shape; and each of the connecting beams is located in a central region of the surface of the soundboard. By this design, the central region of the soundboard can be reinforced.

4. In the above-mentioned scheme, each of the soundboard be equipped with many radiation sound roof beams respectively in the resonance region, each radiation sound roof beam parallel arrangement in the same resonance region, and at least one the one end of radiation sound roof beam is towards the geometric centre of soundboard horizontal direction to strengthen the intensity of soundboard.

5. In the above-mentioned scheme, still be equipped with many radiation sound roof beams on the soundboard, radiation sound roof beam is located each resonance region is in to be radially arranged with the center of soundboard horizontal direction as the benchmark.

6. In the scheme, the soundboard is divided into a peripheral high-sound area, a middle-sound area and a central low-sound area from a sound frequency range; the wall thickness of the soundboard is gradually thickened from outside to inside, the wall thickness of a low-sound area is larger than that of a middle-sound area, and the wall thickness of the middle-sound area is larger than that of a high-sound area; the sound beam assembly is located in the bass region.

By the design, the thicker bass region is arranged close to the center, so that low-frequency vibration with lower frequency and larger amplitude can emit more muddy and mellow bass in the bass region of the soundboard; through setting up thinner high pitch area in the position of keeping away from the center, can make the frequency higher, the less high-frequency vibration of amplitude send more penetrating, bright high pitch at the high pitch area of soundboard, and then make upright piano all obtain effectively promoting at tone quality, the tone quality that full frequency channel produced.

7. In the above scheme, the strip-shaped sound beam member is composed of a wooden base and a weight increasing block connected to the wooden base. By means of the design, the central area of the soundboard can be strengthened, and the sound quality and the tone quality of the bass zone are improved.

8. In the above-mentioned scheme, the inner thickness of strip sound beam component is greater than outer end thickness, the inner thickness of radiation sound beam is greater than outer end thickness, borrows this design, can realize strengthening the central zone of soundboard.

9. In the above scheme, first slot with the second slot is the arc wall, can be so that the soundboard reduces the thickness sudden change as far as possible in thickness, avoids influencing the sympathetic response and the vibration of soundboard.

10. In the above scheme, the lengths of the first groove and the second groove are both smaller than the horizontal width of the soundboard, and smooth transition surfaces are arranged between the outer ends of the first groove and the second groove and the outer wall of the soundboard.

The utility model discloses a theory of operation and advantage as follows:

the utility model relates to a soundboard with a sound beam and a sound tunnel in a vertical piano, wherein the outer wall of the soundboard is provided with a first groove and a second groove, the first groove is transversely arranged in the length direction of the soundboard, and the second groove is longitudinally arranged in the width direction of the soundboard; the two grooves are crossed and communicated with each other, and the outer wall of the sound board is divided into four resonance areas; the center of the outer wall of the soundboard is also provided with a sound beam assembly which comprises a plurality of strip-shaped sound beam components, and the strip-shaped sound beam components are arranged on two sides of the first groove and two sides of the second groove in pairs; the first groove forms a transverse sound tunnel on the outer wall of the soundboard, and the second groove forms a longitudinal sound tunnel on the outer wall of the soundboard.

Compared with the prior art, can't compromise the problem that high, well, bass district possesses good sympathetic response tone simultaneously in order to solve current upright piano, the utility model discloses soundboard design in to current upright piano, especially upright piano has improved. The concrete aspects are as follows: firstly, erecting a sound beam assembly on the outer wall of a sound board; and secondly, a cross groove is formed in the outer wall of the soundboard, so that a cross sound tunnel is formed in the outer wall of the soundboard.

The utility model discloses to current upright piano high pitch area bright not come out, and the not enough problem of low pitch area perfectly, deep discussion and research have been carried out to the design and the vocal mechanism of upright piano, have found out the not good leading cause of tone quality in current upright piano high pitch area and low pitch area because the soundboard design is unreasonable to be sent. In view of the above, the inventor has broken the constraint that the design was constituteed to vertical piano in the past, and the bold has proposed the utility model discloses an improved design scheme, this kind of improved design scheme change the soundboard into present standard vibration mode by free vibration mode in the past, solved vertical piano highlight from the angle of vibration, sympathetic response, sound production and can't come out, and the bass region is muddy mellow and not enough problem, practice proves that this improved design scheme has outstanding substantive characteristics and apparent technological progress to obvious technological effect has been obtained.

The utility model discloses especially, improve the soundboard to the comparatively outstanding bass district tone quality problem of current upright piano, compensatied the range short slab of piano, widened composer's creation width.

Because of above-mentioned technical scheme's application, the utility model discloses compare with current upright piano soundboard and have following advantage and effect:

1. the utility model discloses set up the sound beam subassembly on the outer wall of soundboard, because the relative high pitch amplitude of bass is big, the frequency is low, the bass sympathetic response is concentrated in the central zone that the soundboard is close to the voice coil loudspeaker voice coil, and the high pitch sympathetic response is concentrated in the peripheral region all around of soundboard, strengthens soundboard central zone intensity, has played important effect to improving bass district tone color and tone quality. The thickness of the sound board is a thickness gradually-changing structure with thick central area and thin periphery, so that the strength of the central area of the sound board is enhanced, the thickness difference between the central area and the peripheral area of the sound board is relatively changed, and the sound board has a beneficial effect on improving the tone color and the tone quality of a high-pitch area.

2. The utility model discloses seted up the cross slot on the soundboard outer wall, this cross slot actually forms cross sound tunnel on the outer wall of soundboard, and the vibration is collected by the soundboard center to through the transmission of cross sound tunnel (the tunnel of sound promptly) to the edge all around of soundboard rapidly, this has played the key role to tone quality and the tone quality that improves the high sound zone.

3. The utility model discloses a design of sound roof beam subassembly and cross slot, four piece sympathetic response regions of partition on the soundboard. When the piano is played, the vibration of the strings is transmitted to the center area where the sound tunnels intersect, then transmitted to the four resonance areas through the sound tunnels, and resonance and vibration are generated, so that the string sound is amplified to be the resonance sound of the tone plate. The piano can only produce three sound wave volume when playing before improving, and in the resonant cavity, the soundboard corresponds the region and is a resonance region, and resonance region produces a sound wave volume, adds a string wave volume, and in addition one percussion wave volume counts three sound wave volume altogether. And after improving the utility model discloses can produce six sound wave volume when the piano is played, wherein, four sympathetic response regions produce four sound wave volumes, in addition a string wave volume, in addition a percussion wave volume counts six sound wave volumes altogether. The sound wave quantity, i.e., the number of sound waves, for a specific stringed instrument, in addition to one string wave quantity and one percussion wave quantity, mainly depends on the number of resonance areas of the tone plate, and usually, the instrument produces one sound wave quantity per resonance area during playing, and how many resonance areas produce how many sound wave quantities. In addition, the sound volume directly affects the timbre, penetration and volume of the instrument. Therefore, the design of the invention can obviously improve the timbre of the high-tone area and the low-tone area and increase the penetrating power of the high-tone area and the low-tone area.

4. The utility model discloses each slot all adopts the arc wall, can be so that the soundboard reduces the thickness sudden change as far as possible in thickness, avoids influencing the sympathetic response and the vibration of soundboard.

Drawings

FIG. 1 is a schematic structural view of a conventional soundboard for an upright piano;

FIG. 2 is a schematic structural diagram of a soundboard (without connecting beams) according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a soundboard (with connecting beams) according to an embodiment of the present invention;

fig. 4 is a schematic side view of a soundboard according to an embodiment of the present invention (without tie-beams);

FIG. 5 is a schematic side view of a soundboard according to an embodiment of the present invention (with connecting beams);

fig. 6 is a schematic sectional view of a soundboard body according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an acoustic beam assembly (with a connecting beam) according to an embodiment of the present invention;

fig. 8 is a schematic side view of an acoustic beam assembly (with a connecting beam) according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a radiation sound beam according to an embodiment of the present invention;

fig. 10 is a schematic side view of a radiation beam according to an embodiment of the present invention.

In the above drawings: 1. a soundboard; 2. a first trench; 3. a second trench; 4. a sound beam assembly; 4a strip-shaped sound beam member; 4b, connecting the beams; 5. a radiation sound beam; 6. a resonance region; 7. a wooden base; 8. and (4) increasing the weight.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown and described, and in which modifications and variations can be made without departing from the spirit and scope of the invention.

As used herein, the term "connected" or "disposed" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

Referring to fig. 2-10, a soundboard with a sound beam and a sound tunnel in an upright piano, wherein the soundboard 1 is rectangular, and the inner wall of the soundboard is arranged towards the strings of the piano.

First slot 2 and second slot 3 have been seted up on the outer wall of soundboard 1, and first slot 2 and second slot 3 are the cross and link up each other on the outer wall of soundboard 1, and the crosspoint is located the center of soundboard 1, and then equally divide into four piece resonance regions 6 with the outer wall of soundboard 1.

The first grooves 2 are positioned on the central line of the soundboard 1 in the length direction, and a transverse sound tunnel is formed on the outer wall of the soundboard 1; the second grooves 3 are located at the center line of the soundboard 1 in the width direction, and form a longitudinal sound tunnel on the outer wall of the soundboard 1.

Through set up the cross slot on the outer wall of soundboard 1, this cross slot actually forms the cross sound tunnel on soundboard 1 outer wall, and the region that is close to the center collects the vibration of musical instrument string, and the rethread cross sound tunnel is peripheral edge transmission all around to soundboard 1 rapidly, and this has played the key role to the tone quality and the tone quality that improve the high sound zone. Simultaneously through four sympathetic response regions 6 of equal division on the soundboard 1, the vibration accessible sound tunnel transmits to these four sympathetic response regions 6 to produce the resonance, can obviously improve the tone quality in high-pitched region and bass region.

The sound board is characterized in that a sound beam assembly 4 is further arranged in the center of the outer wall of the sound board 1, the sound beam assembly 4 comprises a plurality of strip-shaped sound beam members 4a, and the strip-shaped sound beam members 4a are arranged on two sides of the first groove 2 and two sides of the second groove 3 in pairs.

Through set up tone beam subassembly 4 on the outer wall at soundboard 1, because bass amplitude is big, the frequency is low relatively, the bass sympathetic response is concentrated on the central zone of soundboard 1, and the treble sympathetic response is concentrated on the peripheral edge region all around of soundboard 1, strengthens soundboard 1 central zone intensity, has played important effect to improving bass district tone color and tone quality. Because the thickness of the soundboard 1 is a thickness gradually changing structure (namely, the design of the thickness of the outer part and the thickness of the inner part) with the thickness of the central area being thick and the thickness of the periphery being thin, the strength of the central area of the soundboard 1 is enhanced, the thickness difference between the central area and the periphery area of the soundboard 1 is relatively changed, and the soundboard 1 also has a beneficial effect on improving the tone color and the tone quality of the high-pitch range.

Preferably, as shown in fig. 3 and 5, a connecting beam 4b is arranged between two adjacent strip-shaped sound beam members 4a, and the connecting beam 4b spans over the first groove 2 and the second groove 3 to form the sound beam assembly in a groined shape; and each of the connecting beams 4b is located in a central region of the surface of the soundboard 1. Constitute a "mouth" font additional strengthening through four tie-beams 4b, further strengthen the bass district at soundboard 1 center to reach the further promotion to piano bass district tone quality.

Preferably, the soundboard 1 is divided into a peripheral high-pitch area, a middle-pitch area and a central low-pitch area from the sounding frequency band; the wall thickness of the soundboard 1 is gradually increased from outside to inside, the wall thickness of a low-sound area is larger than that of a middle-sound area, and the wall thickness of the middle-sound area is larger than that of a high-sound area; by the design, the thicker bass region is arranged at a position close to the center, so that low-frequency vibration with lower frequency and larger amplitude can emit more muddy and smooth bass in the bass region of the soundboard 1; by arranging the thin high pitch range at a position away from the center, high-frequency vibration with higher frequency and smaller amplitude can be enabled to emit more transparent and bright high pitch in the high pitch range of the sound board 1. The sound beam assembly 4 is positioned in the bass region, and can further improve the load of the middle area of the sound board 1.

Preferably, as shown in fig. 7 and 8, the sound bar member 4a is composed of a wooden base 7 and a weight 8 connected to the wooden base 7. By this design, the central area of the soundboard 1 can be further strengthened, and the sound quality and the tone quality of the bass zone can be improved.

Preferably, a plurality of radiation sound beams 5 are respectively arranged in each resonance area 6 of the tone plate 1 in equal number, the radiation sound beams 5 in the same resonance area are arranged in parallel, and one end of at least one radiation sound beam 5 faces the geometric center of the tone plate 1. Besides, the radiation sound beams 5 may be radially arranged with the center of the sound board 1 in the horizontal direction as a reference.

Preferably, the inner end thickness of the strip-shaped sound beam member 4a is greater than the outer end thickness, and the inner end thickness of the radiation sound beam 5 is greater than the outer end thickness. With this design, it is possible to realize reinforcement of the center region of the soundboard 1.

Preferably, the first grooves 2 and the second grooves 3 are arc-shaped grooves, so that the thickness of the soundboard 1 is reduced as much as possible, and the resonance and vibration of the soundboard 1 are prevented from being influenced. The lengths of the first grooves 2 and the second grooves 3 are smaller than the horizontal width of the sound board 1; smooth transition surfaces are arranged between the outer ends of the two

grooves

2 and 3 and the outer wall of the sound board 1, so that vibration is transmitted to the periphery of the sound board 1 more uniformly.

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiments, the illustrated soundboard is only used for illustration, the structure of the soundboard is not used to limit the protection scope of the present invention, and other soundboards with similar structures should be covered by the technical features of the present invention.

2. In the above embodiment, the number of the sound beam assemblies 4 is not limited to one set, but may be a plurality of sets in parallel or other designs which contribute to the center load reinforcement of the soundboard 1, as will be understood and accepted by those skilled in the art.

3. In the above embodiment, the bar-shaped sound beam members 4a may have a radian as shown in the figure and include long sides and short sides, and are arranged on both sides of the first groove 2 in pairs by the long sides of two adjacent bar-shaped sound beam members 4a and arranged on both sides of the second groove 3 in pairs by the short sides of two adjacent bar-shaped sound beam members 4 a;

alternatively, the strip-shaped sound beam members 4a may also be straight strips, and two of the sound beam members are combined at 90 degrees and are arranged on two sides of the first groove 2 and two sides of the second groove 3 in pairs.

4. In the above embodiments, the first grooves 2 and the second grooves 3 are arc-shaped grooves. However, the present invention is not limited thereto, and the groove may be designed into other shapes, such as a V-shape, a U-shape, a W-shape, and other concave structures. As would be readily understood and accepted by those skilled in the art.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a soundboard of area sound roof beam and sound tunnel in vertical piano, its characterized in that:

the soundboard (1) is rectangular, and the inner wall of the soundboard is arranged towards the strings of the piano;

the outer wall of the soundboard (1) is provided with a first groove (2) and a second groove (3), wherein the first groove (2) is transversely arranged in the length direction of the soundboard (1), and the second groove (3) is longitudinally arranged in the width direction of the soundboard (1);

the first grooves (2) and the second grooves (3) are crossed on the outer wall of the soundboard (1) and are communicated with each other, the crossed points are positioned at the center of the soundboard (1), and the outer wall of the soundboard (1) is further divided into four resonance areas (6) in equal parts;

the sound board is characterized in that a sound beam assembly (4) is further arranged in the center of the outer wall of the sound board (1), the sound beam assembly (4) comprises a plurality of strip-shaped sound beam members (4 a), and the strip-shaped sound beam members (4 a) are arranged on two sides of the first groove (2) and two sides of the second groove (3) in pairs;

the first groove (2) forms a transverse sound tunnel on the outer wall of the soundboard (1), and the second groove (3) forms a longitudinal sound tunnel on the outer wall of the soundboard (1).

2. The soundboard according to claim 1, characterised in that: the soundboard (1) is divided into a peripheral high-pitch area, a middle-pitch area and a central low-pitch area from a sounding frequency range;

the wall thickness of the soundboard (1) is gradually thickened from outside to inside, the wall thickness of a low-sound area is larger than that of a middle-sound area, and the wall thickness of the middle-sound area is larger than that of a high-sound area;

the sound beam component (4) is positioned in the bass region.

3. The soundboard according to claim 1, characterised in that: the strip-shaped sound beam component (4 a) is composed of a wooden base (7) and a weighting block (8) connected to the wooden base (7).

4. The soundboard according to claim 1, characterised in that: a connecting beam (4 b) is arranged between every two adjacent strip-shaped sound beam components (4 a), and the connecting beam (4 b) stretches across the upper parts of the first groove (2) and the second groove (3) to form a sound beam assembly (4) in a groined shape; and each of the connecting beams (4 b) is located in a central region of the surface of the soundboard (1).

5. The soundboard according to claim 1, characterised in that: a plurality of radiation sound beams (5) are arranged in each resonance area (6) of the soundboard (1) respectively, each radiation sound beam (5) in the same resonance area is arranged in parallel, and one end of at least one radiation sound beam (5) faces to the geometric center of the soundboard (1) in the horizontal direction.

6. The soundboard according to claim 1, characterised in that: the soundboard (1) is further provided with a plurality of radiation sound beams (5), and the radiation sound beams (5) are located in the resonance areas (6) and are radially arranged by taking the center of the soundboard (1) in the horizontal direction as a reference.

7. The soundboard according to claim 5 or 6, characterised in that: the thickness of the inner end of the radiation sound beam (5) is larger than that of the outer end.

8. The soundboard according to claim 1, characterised in that: the thickness of the inner end of the strip-shaped sound beam component (4 a) is larger than that of the outer end.

9. The soundboard according to claim 1, characterised in that: the first groove (2) and the second groove (3) are both arc-shaped grooves.

10. The soundboard according to claim 1, characterised in that: the lengths of the first groove (2) and the second groove (3) are smaller than the horizontal width of the soundboard (1); smooth transition surfaces are arranged between the outer ends of the first grooves (2) and the second grooves (3) and the outer wall of the soundboard (1).