CN111951762B - A double-beam liuqin - Google Patents
A double-beam liuqin Download PDFInfo
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- CN111951762B CN111951762B CN202010810422.0A CN202010810422A CN111951762B CN 111951762 B CN111951762 B CN 111951762B CN 202010810422 A CN202010810422 A CN 202010810422A CN 111951762 B CN111951762 B CN 111951762B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D1/00—General design of stringed musical instruments
- G10D1/04—Plucked or strummed string instruments, e.g. harps or lyres
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
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Abstract
一种双音梁柳琴，包括共鸣箱，该共鸣箱的箱体由面板和底板拼合而成，其特征在于：在面板内壁上并列固定设置两根上音梁；在面板内壁上开设横向沟槽和纵向沟槽，而横向沟槽与纵向沟槽相互贯通形成横向音隧和纵向音隧；在面板与底板之间固定设置横音梁，该横音梁与两根上音梁组合将面板内壁对应的空间分割成六个共鸣区域。本方案打破了以往柳琴共鸣箱内部构造传统设计的束缚，大胆提出新的改进设计方案，解决了以往柳琴无法兼顾高、中、低音区同时具备良好共鸣音色和穿透力的问题，使柳琴声音的穿透力（衰减小，传得远）大大增强，高音区明亮而富有刚性，中音区柔和而有润音，低音区音质更加淳厚。
A double-beam liuqin includes a resonance box, the box body of which is composed of a panel and a bottom plate, and is characterized in that: two upper sound beams are fixedly arranged in parallel on the inner wall of the panel; a transverse groove and a longitudinal groove are provided on the inner wall of the panel, and the transverse groove and the longitudinal groove are mutually connected to form a transverse sound tunnel and a longitudinal sound tunnel; a transverse sound beam is fixedly arranged between the panel and the bottom plate, and the transverse sound beam and the two upper sound beams are combined to divide the space corresponding to the inner wall of the panel into six resonance areas. This scheme breaks the constraints of the traditional design of the internal structure of the liuqin resonance box in the past, and boldly proposes a new improved design scheme, which solves the problem that the liuqin in the past could not take into account the high, middle and low pitch areas and have good resonance timbre and penetration at the same time, so that the penetration of the liuqin sound (small attenuation, far transmission) is greatly enhanced, the high pitch area is bright and rigid, the middle pitch area is soft and mellow, and the bass area sound quality is more mellow.
Description
Technical Field
The invention relates to a traditional Chinese plucked instrument, in particular to a double sound Liang Liuqin.
Background
The willow, also called willow leaf, diamond leg and soil lute, is a traditional plucked instrument in China. The original popularity is in the provinces of Su, lu, wan, etc. The current popularity is around the country, mainly including the Shandong Linyi and Subei area. The present invention belongs to one of pear-shaped sound box string musical instruments flowing in folk among Tang dynasty, and the appearance, structure and playing method are all same as Ruan Xiangshi.
Willow plays a wide variety of roles in the field of chinese musical performance today. In the national band, the willow is a high-pitch musical instrument of a plucked musical instrument group, has unique sound effect, and often plays important main melodies in the high-pitch region. Because its tone color is not easily masked and fused by other musical instruments, it is sometimes also used for playing of very tricky chinese paragraphs. In addition, the willow also has the sound effect of the mandolin of the American musical instrument, and has special flavor in cooperation with the American band.
The willow musical instrument is composed of a musical head, a musical shaft, a panel, a sound window, a mountain mouth, a musical instrument product, a musical instrument code, fine tuning, a bottom plate (a back plate) and the like. The strings of the willow are usually fixed strings with fixed pitch, one string is also called fine silk strings used for the outer strings, the fixed tone is d of a small word group, two strings are also called middle strings, the fixed tone is g of a small word group, three strings are also called inner strings, the fixed tone is d of a small word group, four strings are also called twining strings, and the fixed tone is g of a small word group. The willow organ is small in style, bright in tone and wide in range, and is originally made of the facing-sun wood at the lower end of the willow tree and shaped like a willow leaf, so that people call the willow organ or the willow organ.
The existing willow has the defects that tone colors of a high-pitched sound area and a low-pitched sound area are required to be improved relative to a medium-pitched sound area, the high-pitched sound area cannot be lightened, the low-pitched sound area is not thick and round enough, and in addition, the penetrating power of the sound of the willow is required to be further improved. The main reason for this is that the existing willow resonance box cannot meet the requirement of good resonance vibration from a high-pitched area to a low-pitched area, namely cannot simultaneously adapt to resonance and vibration with wider frequency variation in the high-pitched area, the medium-pitched area and the low-pitched area. Further research shows that the factors influencing resonance and vibration in the resonance box are more, and besides the materials and thickness of the panel and the bottom plate, the internal structure and the structure of the resonance box are more influenced. The existing resonance box of the willow is unreasonable in design, and good acoustic resonance and vibration between a high-pitched zone and a low-pitched zone are not facilitated to be exerted by the resonance box.
In view of this, it is the subject of the study of the present invention how to improve the resonance box of the existing willow, especially the internal structure and structure of the resonance box.
Disclosure of Invention
The invention provides a double sound Liang Liuqin, which aims to solve the problem that the existing willow resonance box cannot give consideration to both high, medium and low sound areas and has good resonance tone and penetrating power.
In order to achieve the purpose, the invention adopts the technical scheme that the double-sound-beam willow comprises a resonance box, wherein the box body of the resonance box is formed by splicing a panel and a bottom plate, and the innovation is that:
Two upper sound beams are arranged in the resonance box, the upper sound beams are long sound beam members, one sides of the two upper sound beams are tightly fixed on the inner wall of the panel, one sides of the two upper sound beams are suspended in the resonance box relative to the bottom plate, the length direction of the two upper sound beams is consistent with the length direction of the resonance box, and the two upper sound Liang Binglie are seen in the width direction of the resonance box and are separated by a distance.
A first groove is formed in the inner wall of the panel of the resonance box and is formed along the width direction of the resonance box; a second groove is formed in the inner wall of the panel of the resonance box and is formed along the length direction of the resonance box; the first groove and the second groove are arranged on the inner wall of the panel in a crossing way and are communicated with each other, wherein the second groove is positioned between the two upper sound beams, the length direction of the second groove is consistent with the length direction of the upper sound beams, the first groove spans the two upper sound beams in the width direction of the resonance box, an upper transverse sound tunnel is formed on the inner wall of the panel, and the second groove forms an upper longitudinal sound tunnel on the inner wall of the panel.
The relevant content explanation in the technical scheme is as follows:
1. In the above scheme, the theme is "Liuqin", and innovation points are focused on the "resonance box" of the Liuqin, so other structures and constructions besides the resonance box are not described. It is considered that the structure of the willow according to the present invention other than the resonance box is realized by the prior art.
2. In the above scheme, the "resonance box" refers to a sound box formed by splicing a panel and a bottom plate (back plate). The longitudinal direction of the resonance box of the willow is the direction approximately consistent with the strings, and the width direction of the resonance box is the direction perpendicular to the longitudinal direction. The "inner wall" refers to the inner wall surface of the resonance box, for example, the inner wall of the panel refers to the inner wall surface of the panel of the resonance box, and the inner wall of the bottom plate refers to the inner wall surface of the bottom plate of the resonance box.
3. In the above scheme, two lower sound beams can be arranged in the resonance box, the lower sound beams are long sound beam members, one sides of the two lower sound beams are tightly fixed on the inner wall of the bottom plate, the other sides of the two lower sound beams are suspended in the resonance box relative to the panel, the length direction of the two lower sound beams is consistent with the length direction of the resonance box, and the two lower sound Liang Binglie are seen in the width direction of the resonance box and are separated by a distance.
The third groove is arranged on the inner wall of the bottom plate of the resonance box and is arranged along the width direction of the resonance box, the fourth groove is arranged on the inner wall of the bottom plate of the resonance box and is arranged along the length direction of the resonance box, the third groove and the fourth groove are arranged on the inner wall of the bottom plate in a crossing way and are mutually communicated, the fourth groove is positioned between the two lower sound beams, the length direction of the fourth groove is consistent with the length direction of the lower sound beams, the third groove spans the two lower sound beams in the width direction of the resonance box and forms a lower transverse sound tunnel on the inner wall of the bottom plate, and the fourth groove forms a lower longitudinal sound tunnel on the inner wall of the bottom plate.
4. In the above scheme, the resonance box can be internally provided with a cross sound beam which is plate-shaped, wherein the cross sound beam is arranged at the position of the first groove and is bilaterally symmetrical with the center plane of the second groove as a reference, the top of the cross sound beam is fixedly connected with the panel, and the bottom of the cross sound beam is fixedly connected with the bottom plate.
5. In the above scheme, an upper bridge hole can be formed in the upper sound beam, the upper bridge hole is a hole on one side of the upper sound beam, the upper sound beam forms an upper bridge sound beam structure, and the upper bridge hole is erected on the first groove. The lower bridge hole can be arranged on the lower sound beam, one side of the lower sound beam is a hole gap, the lower sound beam forms a lower bridge sound beam structure, and the lower bridge hole is erected on the third groove.
6. In the scheme, an upper reinforcing plate can be arranged between the two upper sound beams, and a lower reinforcing plate can also be arranged between the two lower sound beams.
7. In the scheme, the cross sound beam is arranged in the transverse direction in the resonance box, the center of the cross sound beam is provided with the through hole, the side edge of the cross sound beam, which is connected with the panel and the bottom plate, is provided with the round gap, and the moon hole is formed between the round gap and the inner walls of the panel and the bottom plate in the assembled state.
8. In the above scheme, the first groove, the second groove, the third groove and the fourth groove are all arc grooves.
The design principle and the conception of the invention are that for the willow, the factors influencing the tone and the penetrating power of the willow are many, such as the material, thickness, internal structure and the like of the resonance box. The invention aims to solve the problem that the existing willow resonance box cannot give consideration to high, medium and low tone areas and has good resonance tone and penetration force, and is mainly and thoroughly improved from the perspective of the internal structure of a resonance cavity. The two upper sound beams are fixedly arranged on the inner wall of the panel in the resonance cavity in parallel, and the grooves (namely the first groove and the second groove) are formed on the inner wall of the panel in the resonance cavity, and the grooves form an upper transverse sound tunnel and an upper longitudinal sound tunnel on the inner wall of the panel. Aiming at the problems that the existing high-pitch area of the willow is not bright and the bass area is not smooth enough, the invention carries out intensive discussion and research on the resonance box, particularly the resonance cavity structure and the sounding mechanism of the willow, and finds out that the main reasons of poor tone and penetration of the existing high-pitch area and the bass area of the willow are that the resonance box, particularly the resonance cavity is unreasonable in design, so that sound waves cannot generate good resonance and vibration in the resonance cavity during playing. According to the method, the inventor breaks through the constraint of the traditional resonance box (particularly the resonance cavity) design of the traditional willow, and the invention provides an improved design scheme for solving the problems that the high-pitched zone of the willow is not bright and the low-pitched zone is not full of sound from the aspects of sound wave transmission, vibration, resonance and sounding.
Due to the application of the technical scheme, compared with the traditional zither resonance box, the invention has the following advantages and effects (the best implementation is described in the content of the embodiment of the invention):
1. The invention is provided with the double-tone beam structure in the center of the panel (namely, two upper tone beams are arranged on the inner wall of the panel in parallel), and because the bass has large amplitude and low frequency relative to the treble, the bass resonance is concentrated in the central area of the resonance box, the treble resonance is concentrated in the peripheral edge area of the resonance box, the intensity of the central area of the panel is enhanced, and the invention plays an important role in improving tone and penetrating power of the bass area. On the other hand, the intensity of the central area of the panel is enhanced, the thickness difference between the central area and the peripheral edge area of the resonance box is relatively changed, and the tone and the penetrating power of the high-pitched area are improved.
2. The invention provides grooves (namely a first groove and a second groove) on the inner wall of the panel, and the grooves are mutually communicated on the inner wall of the panel to actually form a longitudinal sound tunnel and a transverse sound tunnel. The sound tunnels form a tunnel for transmitting sound waves in the resonance cavity, and because the bass is large in amplitude and low in frequency relative to the treble, the bass resonance is concentrated in the central area of the resonance box, the treble resonance is concentrated in the peripheral edge area of the resonance box, and when string vibration is collected by the central area and is rapidly transmitted to the periphery of the resonance cavity through the sound tunnels (namely the tunnels of sound), the key effect is played on improving the tone and the penetrating power of the treble area, and meanwhile, the good effect is played on improving the tone and the penetrating power of the bass area.
3. The sound beam is designed Cheng Qiaoshi to form a sound beam structure, and particularly, a hole is designed on one side of the sound beam, so that the sound Liang Xiang bridge arch structure is the same. When the sound beam frame is arranged on the sound tunnel, the sound beam frame is more beneficial to transmitting vibration through the sound tunnel and is also more beneficial to resonance of the resonance box.
4. The invention adopts the design of the cross beams (the first cross beam Liang Hedi and the second cross beam), and the cross beams and the two upper beams are combined to divide the space corresponding to the inner wall of the panel into six resonance areas in the overlooking state of the resonance box. When the lower sound beams are arranged on the inner wall of the bottom plate, the space corresponding to the inner wall of the bottom plate is divided into six resonance areas by combining the transverse sound beams (the first transverse sound Liang Hedi two transverse sound beams) with the two lower sound beams, and the total number of the resonance areas is twelve. When the willow is played, the string vibration is firstly transferred to the central area of the resonance cavity, then transferred to the twelve resonance areas through the sound tunnel, resonance and vibration are generated, and therefore string sound is amplified to resonance sound of the resonance box. When the willow is played before improvement, only five sound wave quantities can be generated, namely, two sound beams divide the resonance cavity into three resonance areas, each resonance area generates one sound wave quantity, one chord wave quantity and one percussion wave quantity, and the total of five sound wave quantities are calculated. After improvement, the single-sided double sound Liang Liuqin of the invention can generate eight sound wave quantities when played, wherein six resonance areas generate six sound wave quantities, one chord wave quantity is added, and the total of eight sound wave quantities is added. And fourteen sound wave quantities can be generated when the double-sided double sound Liang Liuqin is played, wherein twelve sound wave quantities are generated in twelve resonance areas, one chord wave quantity is added, and the total of fourteen sound wave quantities is added. The amount of sound waves, i.e. the number of sound waves, is mainly dependent on the number of resonance areas in the resonance box, except for one string and one firing wave, for a plucked instrument of a specific resonance box, and in general, when the instrument is played, one sound wave is generated in each resonance area, and how many resonance areas will generate how many sound waves. In addition, the sound wave quantity directly affects the tone color, penetration force and volume of the instrument. Therefore, the design of the invention can obviously improve the tone quality of the high-pitched sound zone and the low-pitched sound zone, and increase the penetrating power and the volume of the high-pitched sound zone and the low-pitched sound zone.
5. The through holes on the cross sound beam and the moon holes between the cross sound beam and the panel and the bottom plate are channels between the resonance areas in the resonance cavity, and the channel design is beneficial to mutual transmission of sound waves, resonance and vibration.
6. The invention fixedly erects the upper reinforcing plate between the two upper sound beams, and the lower reinforcing plate is fixedly arranged between the two lower sound beams, so that the invention has the advantages that the intensity between the panel and the middle area of the bottom plate, especially between the upper sound beams and between the lower sound beams, can be increased, the load when the two upper sound beams and the two lower sound beams resonate can be increased, the tone and the penetrating power of a bass region are further improved, the central area of the resonance box is reinforced, the intensity difference between the upper sound beams and the peripheral edge area of the resonance box is relatively pulled open, and the tone and the penetrating power of a treble region are also improved.
7. According to the invention, the first groove, the second groove, the third groove and the fourth groove are all arc grooves, so that the thickness abrupt change of the panel and the bottom plate can be reduced as much as possible in thickness, and resonance and vibration of the resonance box are affected.
The above advantages and effects are best illustrated. It is particularly emphasized that the provision of the double beam structure and the provision of the grooves in the inner wall of the panel is more important for the present invention than the provision of the equivalent means in the inner wall of the floor, and the effect and effect are relatively better. The reason is that the panel is provided with strings, and the bottom plate is not directly connected with the strings. Therefore, the provision of the double-sound beam structure and the provision of the grooves on the inner wall of the panel are key to solving the technical problems of the present invention, and the provision of the double-sound beam structure and the provision of the grooves on the inner wall of the bottom plate are excellent for the present invention, which is easily understood by those skilled in the art.
Drawings
FIG. 1 is a front view of a conventional Liuqin;
FIG. 2 is a left side view of a prior art Liuqin;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
Fig. 4 is a schematic diagram of a front view structure of a willow organ according to embodiment 1 of the present invention;
FIG. 5 is a left side view of the Liuqin of example 1 of the present invention;
FIG. 6 is a cross-sectional view B-B of FIG. 4;
FIG. 7 is a cross-sectional view of the resonating box of FIG. 6;
FIG. 8 is a cross-sectional view C-C of FIG. 4;
Fig. 9 is a schematic diagram of a front view structure of a willow organ according to embodiment 2 of the present invention;
FIG. 10 is a left side view of the Liuqin of example 2 of the present invention;
FIG. 11 is a D-D sectional view of FIG. 9;
FIG. 12 is a cross-sectional view of the resonance box of FIG. 11;
FIG. 13 is a sectional view E-E of FIG. 9;
fig. 14 is a front view of the upper boom in embodiment 1 and embodiment 2 of the present invention;
Fig. 15 is a left side view of the upper boom in embodiment 1 and embodiment 2 of the present invention;
fig. 16 is a front view of the down beam in embodiment 2 of the present invention;
FIG. 17 is a left side view of the down sill in embodiment 2 of the present invention;
fig. 18 is a front view of the first cross beam in embodiment 1 and embodiment 2 of the present invention;
Fig. 19 is a left side view of the first cross beam in embodiment 1 and embodiment 2 of the present invention;
Fig. 20 is a front view of the second cross beam in embodiment 1 and embodiment 2 of the present invention;
fig. 21 is a left side view of the second cross beam in embodiment 1 and embodiment 2 of the present invention.
In the drawings, a panel 1, a bottom plate 2, a sound beam 3, a sound beam 4, an eight-shaped sound beam 5, a sound column 6, an upper sound beam 7, a lower sound beam 8, a first groove 9, a second groove 10, a third groove 11, a fourth groove 12, an upper bridge hole 13, a lower bridge hole 14, a sound outlet hole 15, a first transverse sound beam 16, a second transverse sound beam 17, an upper reinforcing plate 18, a lower reinforcing plate 19, a first round notch 20, a first month bud hole 21, a second round notch 22, a second month bud hole 23, a first through hole 24 and a second through hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
Example 1A double tone Liang Liuqin (Single side double tone beam Structure)
Since the innovations of the present invention are focused on the resonance box, the present embodiment will focus on the structure and construction of the resonance box of the willow, while other structures related to the willow can be considered to be implemented by the prior art, and will not be described in detail in the present embodiment.
The structure and construction of the resonance box of the willow in the embodiment are as shown in fig. 4-8, 14, 15 and 18-21, and the box body of the resonance box is formed by splicing a panel 1 and a bottom plate 2 (see fig. 5-8).
Two upper sound beams 6 (see fig. 4 and 6) are arranged in the resonance box, the upper sound beams 6 are long sound beam members (see fig. 14 and 15), one sides of the two upper sound beams 6 are tightly fixed on the inner wall of the panel 1, the other sides of the two upper sound beams 6 are suspended in the resonance box relative to the bottom plate 2 (see fig. 6), the length directions of the two upper sound beams 6 are consistent with the length directions of the resonance box (see fig. 4), and the two upper sound beams 6 are parallel and are separated by a distance (see fig. 6) in the width direction of the resonance box. The upper bridge 6 is provided with an upper bridge hole 12 (see fig. 14), the upper bridge hole 12 is a hole on one side of the upper bridge 6, the upper bridge 6 forms an upper bridge type sound beam structure, and the upper bridge hole 12 is erected on the first groove 8.
Two first grooves 8 (see fig. 4) are formed in the inner wall of the panel 1 of the resonance box, the two first grooves 8 are formed in the width direction of the resonance box, and the two first grooves 8 are arranged at intervals in the length direction of the resonance box. A second groove 9 (see fig. 4) is arranged on the inner wall of the panel 1 of the resonance box, the second groove 9 is arranged along the length direction of the resonance box, and the second groove 9 is positioned at the central position in the width direction of the resonance box. Two first grooves 8 and one second groove 9 intersect and penetrate each other on the inner wall of the panel 1 (see fig. 7), wherein the second groove 9 is located at a position between the two upper beams 6, and the length direction of the second groove 9 is identical to the length direction of the upper beams 6. The two first grooves 8 cross the two upper beams 6 in the width direction of the resonance box and form two upper transverse sound tunnels on the inner wall of the panel 1 (see fig. 4), and the second grooves 9 form upper longitudinal sound tunnels on the inner wall of the panel 1 (see fig. 4).
The length of the first groove 8 is smaller than the length of the panel 1 in the resonance box at the corresponding position of the first groove 8 (see fig. 4), and smooth transition surfaces are arranged between the two ends of the first groove 8 and the inner wall of the panel 1. The length of the second groove 9 is smaller than that of the panel 1 in the resonance box at the corresponding position of the second groove 9 (see fig. 4), and smooth transition surfaces are arranged between the two ends of the second groove 9 and the inner wall of the panel 1.
The resonance box is internally provided with a first cross sound beam 15 and a second cross sound beam 16 (see fig. 4), the first cross sound beam 15 and the second cross sound beam 16 are both plate-shaped, wherein the two first cross sound beams 15 are arranged at the position of one first groove 8 and are symmetrical left and right (see fig. 4) by taking the central surface of the second groove 9 as a reference, the top of each first cross sound beam 15 is fixedly connected with the panel 1, and the bottom of each first cross sound beam 15 is fixedly connected with the bottom plate 2 (see fig. 6). Two second cross beams 16 are arranged at the position of the other first groove 8, and are bilaterally symmetrical with respect to the center plane of the second groove 9 (see fig. 4), the top of each second cross beam 16 is fixedly connected with the panel 1, and the bottom of each second cross beam 16 is fixedly connected with the bottom plate 2 (see fig. 8). The first cross beam 15 and the second cross beam 16 are both disposed in the transverse direction in the resonance box, and a first through hole 23 is provided in the center of the first cross beam 15 (see fig. 18). A second through hole 24 (see fig. 20) is provided in the center of the second cross beam 16. The side of the first cross beam 15 connected with the panel 1 and the bottom plate 2 is provided with a first round notch 19 (see fig. 18), and a first moon hole 20 is formed between the first round notch 19 and the inner walls of the panel 1 and the bottom plate 2 in the assembled state (see fig. 6). The second cross beam 16 is provided with a second round notch 21 (see fig. 20) on the connecting side of the panel 1 and the bottom plate 2, and a second moon hole 22 (see fig. 8) is formed between the second round notch 21 and the inner walls of the panel 1 and the bottom plate 2 in the assembled state.
An upper reinforcing plate 17 (see fig. 6) is arranged between the two upper sound beams 6, a sound column 5 (see fig. 4) is arranged at the crossing position of the first groove 8 and the second groove 9, the sound column 5 is of a supporting column structure, one end of the sound column 5 is supported on the panel 1, and the other end is supported on the bottom plate 2 (see fig. 6). The first grooves 8 and the second grooves 9 are arc-shaped grooves (see fig. 7).
Example 2A double tone Liang Liuqin (double-sided double-tone beam structure)
Embodiment 2 is different from embodiment 1 in that the bottom plate 2 of embodiment 1 is a thick plate, and no double-tone beam and groove structure is provided on the inner wall of the bottom plate 2, whereas the bottom plate of embodiment 2 is a thin plate, and a double-tone beam and groove structure is provided on the inner wall of the bottom plate 2. The specific contents are as follows:
As shown in fig. 9-13, 16, 17 and 17, two lower sound beams 7 (see fig. 10 and 11) are arranged in the resonance box, the lower sound beams 7 are long sound beam members (see fig. 16 and 17), one sides of the two lower sound beams 7 are tightly fixed on the inner wall of the bottom plate 2, the other sides of the two lower sound beams 7 are suspended in the resonance box relative to the panel 1 (see fig. 11), the length directions of the two lower sound beams 7 are consistent with the length directions of the resonance box (see fig. 10), and the two lower sound beams 7 are parallel and are separated by a distance (see fig. 11) in the width direction of the resonance box. The lower sound beam 7 is provided with a lower bridge hole 13 (see fig. 16), the lower bridge hole 13 is a hole on one side of the lower sound beam 7, the lower sound beam 7 forms a lower bridge sound beam structure, and the lower bridge hole 13 is erected on the third groove 10.
Two third grooves 10 (see fig. 10) are formed in the inner wall of the bottom plate 2 of the resonance box, the two third grooves 10 are formed in the width direction of the resonance box, and the two third grooves 10 are arranged at intervals in the length direction of the resonance box. A fourth groove 11 (see fig. 12) is formed in the inner wall of the bottom plate 2 of the resonance box, the fourth groove 11 is formed in the length direction of the resonance box, and the fourth groove 11 is located at the center in the width direction of the resonance box. Two third grooves 10 intersect and penetrate one fourth groove 11 on the inner wall of the base plate 2, wherein the fourth groove 11 is located at a position between the two down beams 7 (see fig. 11), and the length direction of the fourth groove 11 coincides with the length direction of the down beams 7. The two third grooves 10 cross the two lower sound beams 7 in the width direction of the resonance box, and form two lower horizontal sound tunnels on the inner wall of the bottom plate 2, and the fourth grooves 11 form a lower longitudinal sound tunnel on the inner wall of the bottom plate 2.
The length of the third groove 10 is smaller than that of the bottom plate 2 in the resonance box at the corresponding position of the third groove 10, and smooth transition surfaces are arranged between the two ends of the third groove 10 and the inner wall of the bottom plate 2. The length of the fourth groove 11 is smaller than that of the bottom plate 2 in the resonance box at the corresponding position of the fourth groove 11, and smooth transition surfaces are arranged between the two ends of the fourth groove 11 and the inner wall of the bottom plate 2.
A lower reinforcing plate 18 (see fig. 11) is arranged between the two lower sound beams 7. The third groove 10 and the fourth groove 11 are arc grooves.
Other contents of embodiment 2 are the same as those of embodiment 1, and a description thereof will not be repeated here.
The following description is made with respect to other embodiments and structural variations of the present invention:
1. In the above embodiment, the two upper beams 6 are juxtaposed in parallel as seen in the width direction of the resonance box (see fig. 6). The two lower sound beams 7 are parallel and juxtaposed (see fig. 11). However, the present invention is not limited thereto, and the two upper beams 6 and the two lower beams 7 are not necessarily parallel, but the parallel arrangement is optimal, as will be readily understood and accepted by those skilled in the art.
2. In the above embodiment, the double-sound beam structure is provided on both the inner walls of the panel 1 and the bottom plate 2. Namely, two upper sound beams 6 are arranged on the panel 1, and two lower sound beams 7 are arranged on the bottom plate 2. However, the present invention is not limited to this, and two upper beams 6 may be changed from four upper beams 6 in form to be used in parallel. For the present invention, the four upper beams 6 are identical in nature, although the number and form of the four upper beams 6 are different from those of the two upper beams 6. It is assumed that two outer sound beams of the four upper sound beams 6 are directed to two inner sound beams Liang Kaojin, which can be equivalent to a double sound beam. Such variations are therefore considered to have no unexpected effect and are to be understood to be substantially equivalent. Similarly, the double beam structure on the base plate 2 should also include such variations. In the present invention, the double-tone beam includes the meaning of symmetrical arrangement of the double-tone beam, so that symmetrical arrangement of the six-tone beam is also an equivalent variation of the present invention. As will be readily appreciated by those skilled in the art.
3. In the above embodiment, two first grooves 8 (see fig. 4) are formed on the inner wall of the panel 1, and two third grooves 10 (see fig. 10) are formed on the inner wall of the bottom plate 2. The present invention is not limited thereto and the first grooves 8 and the third grooves 10 may be one, three, four, five, or the like in number. Such a change may be determined according to the actual situation. The number of first grooves 8 and third grooves 10 is at least one as seen in essence.
4. In the above embodiment, the two first cross beams 15 and the two second cross beams 16 (see fig. 4 and 9). The two first cross beams 15 and the two second cross beams 16 are symmetrical left and right with respect to the center plane of the second groove 9 (see fig. 4 and 9), but the present invention is not limited thereto, and the two first cross beams 15 may be combined into one first cross beam 15 by being connected to each other, and the two second cross beams 16 may be combined into one second cross beam 16 by being connected to each other, which is easily understood and accepted by those skilled in the art.
5. In the above embodiment, the upper bridge 12 is provided on the upper sound beam 6, and the lower bridge 13 is provided on the lower sound beam 7. However, the present invention is not limited thereto, and the upper bridge hole 12 may not be provided, and the lower bridge hole 13 may not be provided, and even only one of the upper and lower sound beams 6 and 7 may be provided. This is readily understood and accepted by those skilled in the art.
6. In the above embodiment, the upper reinforcing plate 17 (see fig. 6) is provided in the fixing frame between the two upper sound beams 6, and the lower reinforcing plate 18 (see fig. 11) is provided in the fixing frame between the two lower sound beams 7. However, the present invention is not limited to this, and the two upper beams 6 may be suspended in the resonance box without providing the upper reinforcing plate 17. Similarly, the two lower sound beams 7 may be suspended in the resonance box without providing the lower reinforcing plate 18. The upper reinforcing plate 17 and the lower reinforcing plate 18 can increase the strength between the middle areas of the front plate and the back plate, particularly between the upper sound beams and between the lower sound beams, and can increase the load when the two upper sound beams and the two lower sound beams resonate.
7. In the above embodiment, the first groove 8, the second groove 9, the third groove 10 and the fourth groove 11 are all arc-shaped grooves. However, the present invention is not limited thereto, and the grooves may be designed in other shapes, such as a V-shape, a U-shape, a W-shape, etc. concave structure. This is readily understood and accepted by those skilled in the art.
8. In the above embodiment 2, the two lower beams 7 and the two upper beams 6 are arranged in correspondence with each other in position in the up-down direction as viewed from the cross section of the resonance box (see fig. 11). However, the present invention is not limited to this, and the alignment arrangement may be omitted, but the alignment arrangement is optimal. This is readily understood and accepted by those skilled in the art.
9. In the above embodiment, the shape and the size of the two upper beams 6 are the same (see fig. 14). The two down beams 7 are identical in shape and size (see fig. 16). However, the present invention is not limited thereto, and the shape and size of the two upper beams 6 may be different, and the shape and size of the two lower beams 7 may be different. The method can be determined according to the fact that the tone quality and tone quality of the resonance box are adjusted. This is readily understood and accepted by those skilled in the art.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (9)
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| CN103137105B (en) * | 2011-11-29 | 2015-06-10 | 刘寒力 | Dulcimer convenient to play and broad in range |
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