Plastic you Ke Li
阅读说明：本技术 一种塑料尤克里里 (Plastic you Ke Li ) 是由 曹正樑 于 2020-09-02 设计创作，主要内容包括：本发明涉及一种塑料尤克里里,包括面板、指板、琴头盖板和琴身底壳,所述的面板、指板、琴头盖板扣合在琴身底壳上组合成完整的琴身；所述的面板背面靠近边缘处沿外轮廓设有一圈外廓加强筋,面板的中上部开有音孔,面板背面围绕音孔设置有左、右纵向加强筋和上、下横向加强筋,下横向加强筋下方与外廓加强筋围合起来的面板部分为振动发音部,振动发音部的厚度为1.0-1.4mm,面板背面位于振动发音部设有平行斜向交叉的网状音樑,网状音樑与面板一体注塑成型。本发明在具有高强度结构的同时,实现了传统木制尤克里里无法做到的超薄面板振动发音部,不仅音量更大,音色足以媲美甚至超过传统木制尤克里里。并且制造工艺简单高效,成本较低,适合大规模批量生产和全天候使用。(The invention relates to a plastic you Ke Li, comprising a panel, a finger board, a headstock cover plate and a body bottom shell, wherein the panel, the finger board and the headstock cover plate are buckled on the body bottom shell to form a complete body; the panel back be close to the edge and be equipped with round outline strengthening rib along the outline, the well upper portion of panel is opened there is the sound hole, the panel back is provided with left and right vertical strengthening rib and upper and lower horizontal strengthening rib around the sound hole, the panel portion that closes is enclosed with the outline strengthening rib below the lower horizontal strengthening rib is the vibration portion of pronouncing, the thickness of vibration portion of pronouncing is 1.0-1.4mm, the panel back is located the vibration portion of pronouncing and is equipped with the crisscross netted tone beam of parallel slant, netted tone beam and the integrative injection moulding of panel. The invention has high-strength structure, realizes the ultra-thin panel vibration sound-producing part which can not be realized by the traditional wood Yorkri, and has larger volume and tone color which is comparable to or even superior to that of the traditional wood Yorkri. And the manufacturing process is simple and efficient, the cost is lower, and the method is suitable for large-scale batch production and all-weather use.)
1. The utility model provides a plastics you keli, includes panel, fingerboard, headstock apron and body drain pan, its characterized in that: the panel, the finger plate, the headstock cover plate and the body bottom shell are injection molding parts, and the panel, the finger plate and the headstock cover plate are buckled on the body bottom shell to form a complete body;
the panel back be close to the edge and be equipped with round outline strengthening rib along the outline, the well upper portion of panel is opened there is the sound hole, the panel back is provided with left and right vertical strengthening rib and upper and lower horizontal strengthening rib around the sound hole, the panel portion that closes is enclosed with the outline strengthening rib below the lower horizontal strengthening rib is the vibration portion of pronouncing, the thickness of vibration portion of pronouncing is 1.0-1.4mm, the panel back is located the vibration portion of pronouncing and is equipped with the crisscross netted tone beam of parallel slant, netted tone beam and the integrative injection moulding of panel.
2. A plastic you keli in accordance with claim 1, wherein: the reticular sound beams are parallel and obliquely crossed at equal intervals, and the number of the sound beams ranges from 5 × 5, 6 × 6, 7 × 7, 8 × 8, 9 × 9 or 10 × 10.
3. A plastic you keli according to claim 1 or 2, characterised in that: the net-shaped tone beam is an arch-shaped tone beam with two low ends and a high middle part, the thickness interval of a single tone beam is 0.7-1.4mm, and the height interval is 1.0-6.0 mm.
4. A plastic you keli in accordance with claim 3, wherein: the top edge of the reticular tone beam and the intersection point of the reticular tone beam are on the same cambered surface.
5. A plastic you keli in accordance with claim 4, wherein: the net-shaped tone beam is provided with a transverse short tone beam on the left outermost side and a transverse short tone beam on the right outermost side respectively, and the intersection points of the left transverse short tone beam and the longest two tone beams are in a straight line.
6. A plastic you keli in accordance with claim 1, wherein: the thickness of the panel enclosed by the upper part of the lower transverse reinforcing rib and the outline reinforcing rib is not less than 2.5 mm.
7. A plastic you keli in accordance with claim 1, wherein: the bottom case of the piano body consists of a round back of a piano barrel, a handle and a bottom case of a piano head, wherein the round back of the piano barrel is of a large-radian parabola round back type structure with the thickness not less than 3.1 mm.
8. A plastic ukulele as claimed in claims 1, 2, 5 and 6, characterized in that the front panel, fingerboard, head cover and bottom shell are injection moulded from 10-30% glass fibre reinforced polycarbonate.
9. A plastic you keli in accordance with claim 1, wherein: the back of panel, fingerboard, musical instrument head apron be close to the edge and be equipped with bellied panel dop, fingerboard dop, musical instrument head apron dop along the outline, the panel dop is located the outside of outline strengthening rib, the topside of body drain pan corresponds the panel dop, the fingerboard dop, the musical instrument head apron dop forms the body drain pan draw-in groove of indent, panel, fingerboard, musical instrument head apron pass through the panel dop, the fingerboard dop, the musical instrument head apron dop makes up into complete musical instrument body with the lock of body drain pan draw-in groove according to the preface from bottom to top on the body drain pan.
10. A plastic you keli in accordance with claim 8, wherein: the panel dop, fingerboard dop, headstock apron dop be ultrasonic bonding muscle, headstock apron, fingerboard and panel pass through ultrasonic bonding and fuse as an organic whole with the lock of body drain pan.
Technical Field
The invention relates to a musical instrument, in particular to a plastic you keli.
Technical Field
The ukuleli is a popular musical instrument in the world at present, only has 4 strings, is smaller than a guitar in size, and is suitable for playing simple and cheerful tunes. The traditional ukulele is made of wood, and has similar physical characteristics and structural dynamics principles with the wooden classical guitar. The you keli can be subdivided into four specifications, namely a high-pitch you keli with the length of 21 inches; the length of the Zhongyin you keli is about 23-24 inches; a tenor you keli, length 25-26 inches; low-pitch ukulele, length of about 30 inches.
There is a wooden classical guitar making theory, which imitates the vibration sounding principle of drum to reach higher volume and better tone. This theory suggests that the drum can emit such a large volume because the drum skin is very thin and thin, and the drum upper is very thick. The light and thin drum skin can generate strong vibration, while the thick drum upper is not easy to vibrate, so that the tone of the drum skin cannot be interfered, and the sound wave generated by the vibration of the drum skin is simply reflected.
Therefore, the panel of the classical guitar is made to be very thin, the thickness of the wooden panel of the common full-size guitar is about 2.8mm generally, and the thickness of the ultrathin panel is only about 1.4 mm. In order to support such a thin panel without collapsing or cracking deformation, a structure of a mesh tone beam is adopted in a main vibration sound emission portion of the panel. According to the wooden netted tone beam, a plurality of tone beams are obliquely and equidistantly arranged in a crossed mode to form a rhombic lattice shape, the crossed points of the tone beams are matched with each other through accurate opening glue coating, a complete netted tone beam structure is formed after the glue is solidified, and then the whole body of the netted tone beam structure is coated with glue and adhered to a main vibration sounding part on the back face of a guitar panel. Since each tone beam is notched at the intersection point and is easily broken at the notch, the tone beam needs to be reinforced by adhering carbon fiber cloth to the tone beam. Each tone beam is made to be high in the middle and low in the two ends so as to reduce the weight, and the processing technology is very complicated.
In order to limit the ineffective vibration of the parts except the main vibration and the pronunciation of the panel, the panel except the net-shaped tone beam is adhered and reinforced by thick and heavy multi-layer clamping plates beside the sound hole, and the thickness of the side plate and the bottom plate of the barrel is also doubled compared with that of a common guitar so as to imitate the principle of a drum upper. And the bottom plate of the musical instrument barrel is hot-pressed into a turtle-back shape, so that the sound wave can be reflected better. The full-size classical guitar made by adopting the principle is distinguished by large volume and high tone response.
However, since the size of the panel of the wood ukulele is much smaller than that of the full-size classical guitar, if the net-shaped tone beam is adopted, a difficulty exists in the processing technology: the crossing point of the wood tone beam which is too thin is notched and is easy to break, the supporting strength is not enough at all, and the wood tone beam which is thick enough can weaken the vibration of the panel and counteract the effect of the ultrathin panel.
In addition, because the influence of the climate on the wood is large, the wood guitar is deformed due to the fact that the wood is too wet and too dry, and the tone quality is affected. The plastic material Youkeli is not influenced by climate change, has the advantages of simple processing technology, firmness and durability, is suitable for large-scale batch production and all-weather use, and becomes a new favorite of consumers.
However, the existing plastic ukulele in the market has a lower timbre and volume than the traditional wooden ukulele due to the structural design and material strength. Therefore, a plastic you keli is needed, which can meet the advantages of simple processing technology, suitability for batch production and all-weather use, and has the advantages of high structural strength, reasonable arrangement of the ultra-thin panel sound generation part and the sound beam, so that the timbre and the volume of the plastic you keli can reach or even exceed those of the traditional wood you keli.
Disclosure of Invention
The invention aims to: the plastic you keli has the advantages of simple processing technology, suitability for large-scale batch production and all-weather use, and has the advantages of high structural strength, firmness and durability, and reasonable arrangement of the ultra-thin panel sound producing part and the tone beam, so that the tone color and the tone volume of the plastic you keli can reach or even exceed those of the traditional wood you keli.
The purpose of the invention is realized by the following scheme: the utility model provides a plastics you keli, includes panel, fingerboard, headstock apron and body drain pan, its characterized in that: the panel, the finger plate, the headstock cover plate and the body bottom shell are injection molding parts, and the panel, the finger plate and the headstock cover plate are buckled on the body bottom shell to form a complete body;
the panel back be close to the edge and be equipped with round outline strengthening rib along the outline, the well upper portion of panel is opened there is the sound hole, the panel back is provided with left and right vertical strengthening rib and upper and lower horizontal strengthening rib around the sound hole, the panel portion that closes is enclosed with the outline strengthening rib below the lower horizontal strengthening rib is the vibration portion of pronouncing, the thickness of vibration portion of pronouncing is 1.0-1.4mm, the panel back is located the vibration portion of pronouncing and is equipped with the crisscross netted tone beam of parallel slant, netted tone beam and the integrative injection moulding of panel.
The outline reinforcing ribs, the longitudinal reinforcing ribs, the transverse reinforcing ribs and the mesh tone beams of the panel are connected with one another to form an integral reinforced support structure. The outline reinforcing ribs, the longitudinal reinforcing ribs and the transverse reinforcing ribs can effectively prevent the vibration of the vibration sound-producing part of the panel from being conducted outwards inefficiently, and the vibration energy of the panel is prevented from being lost.
Theoretically, as the thickness of the vibration sound generation portion of the panel becomes thinner, the generated vibration becomes stronger and faster, and the sound volume becomes larger. However, the ultra-thin panel is easy to collapse, crack or warp and deform under the continuous action of string tension due to the weak rigidity and strength of the ultra-thin panel. On the other hand, the net-shaped tone beam can generate a more uniform and overall supporting force by dividing the vibration sound generation part into rhombic lattices each having an equal area, compared with other tone beam structures. The tone beam is integrally injection-molded with the panel without gluing, the cross point of each tone beam is not provided with a notch, the tone beam is thin, light in weight, sufficient in toughness, high in supporting strength and simple in processing technology, and the process problem that the traditional wood Youkili cannot realize is solved. Due to the effective support of the net-shaped tone beam, the vibrating sounding part of the panel can be made to be ultrathin between 1.0 and 1.4mm, so that the timbre and the sound volume which are comparable to or even exceed those of the traditional wooden peculi are obtained.
On the basis of the scheme, the mesh sound beams are parallel and obliquely crossed at equal intervals, and the number of the sound beams ranges from 5 × 5, 6 × 6, 7 × 7, 8 × 8, 9 × 9 or 10 × 10.
On the basis of the scheme, the net-shaped tone beams are all arch-shaped tone beams with two low ends and a middle high end, the thickness interval of a single tone beam is 0.7-1.4mm, and the height interval is 1.0-6.0 mm.
Preferably, the top edge of the netted sound beam and the intersection point of the netted sound beam are on the same cambered surface, so that the structure fastness is guaranteed, and the processing is convenient.
Preferably, the net-shaped tone beam is provided with a transverse short tone beam on the outermost left side and the outermost right side respectively, the intersection points of the left transverse short tone beam and the right transverse short tone beam and the two longest tone beams are in a straight line, and the left transverse short tone beam and the right transverse short tone beam are used for eliminating 'wolf' sound generated by resonance when a part of tone is played.
By adopting the design of the mesh tone beam, the invention ensures that the vibration sounding part is ultrathin and has high strength, and obtains ideal tone quality and sound volume.
On the basis of the scheme, the thickness of the panel enclosed by the upper part of the lower transverse reinforcing rib and the outline reinforcing rib is not less than 2.5 mm.
By increasing the panel thickness in the region other than the vibration sound emission portion, the ineffective vibration and disturbance in the region other than the vibration sound emission portion of the panel are further limited.
On the basis of the scheme, the bottom case of the piano body consists of a round back of a piano barrel, a handle and a bottom case of a piano head, and the round back of the piano barrel is of a large-radian parabola round back type structure with the thickness not less than 3.1 mm.
The invention gives full play to the advantages of large elastic modulus of plastic materials and simple injection molding process, and the bottom side of the piano body is injected into a harmonica barrel with a large radian and a parabolic back which is a coherent whole. Meanwhile, the principle of the drum upper is imitated, the thickness of the round back of the piano barrel is thickened to be more than 3.1mm, and the ineffective vibration of the piano barrel is weakened.
On the basis of the scheme, the panel, the finger board, the headstock cover plate and the bottom case of the piano body are formed by injection molding of 10-30% of glass fiber reinforced polycarbonate.
The glass fiber reinforced polycarbonate composite plastic with 10-30 percent of content is molded by injection through a mold, and combines the advantages of good toughness, impact resistance and temperature difference resistance of polycarbonate and high rigidity and small molding shrinkage of glass fiber, and has better Krili tone, structural strength and stability.
Further, the back of panel, fingerboard, musical instrument head apron be close to the edge and be equipped with bellied panel dop, fingerboard dop, musical instrument head apron dop along the outline, the panel dop is located the outside of outline strengthening rib, the topside of body drain pan corresponds the panel dop, the fingerboard dop, the musical instrument head apron dop forms the body drain pan draw-in groove of indent, panel, fingerboard, musical instrument head apron pass through the panel dop, the fingerboard dop, the musical instrument head apron dop and the body drain pan draw-in groove according to the preface lock makes up into complete musical instrument body on the body drain pan from bottom to top.
Preferably, panel dop, fingerboard dop, headstock apron dop be ultrasonic bonding muscle, headstock apron, fingerboard and the lock department of panel and body drain pan fuse through ultrasonic bonding and become an organic whole.
The invention provides a plastic you keli, the superiority lies in: when having high strength structure, realized that traditional wood system is in you keli can't accomplish ultra-thin panel vibration sound production portion, not only the volume is bigger, and the tone quality is enough to compare favourably even surpass traditional wood system in you keli. Meanwhile, the injection molding process is simple and efficient, has low cost, and is suitable for large-scale batch production and all-weather use.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a front perspective view of the present invention;
FIG. 2 is a rear perspective view of the present invention;
FIG. 3 is a front perspective view of the bottom case of the body of the present invention;
FIG. 4 is a partial enlarged view A of FIG. 3;
FIG. 5 is a rear view of the panel of the present invention;
fig. 6 is a partial enlarged view B of fig. 5;
FIG. 7 is a side view of the panel of the present invention;
FIG. 8 is a rear view of the fingerboard of the present invention;
fig. 9 is a rear view of the headstock cover of the present invention.
Reference numbers in the figures:
1-bottom case of body;
11-a bottom shell slot of the body;
12-round back of barrel; 13-a handle; 14-headstock bottom case;
2-a panel;
21-panel clamp; 22-outline reinforcing ribs; 23-sound hole;
241. 242-left and right longitudinal stiffeners;
251. 252-upper and lower transverse stiffeners;
26-vibration sound producing part;
3-fingerboard;
31-fingerboard chuck;
4-headstock cover plate;
41-headstock cover plate chuck;
5-a reticular tone beam;
51-two intersection points of the reticular tone beams;
521. 522 — left and right lateral short tone beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1 to 9, a plastic ukulele comprises a panel 2, a finger board 3, a head cover plate 4 and a body bottom case 1 which are respectively injection molded, wherein the panel 2, the finger board 3, the head cover plate 4 and the body bottom case 1 are injection molded by a mold by adopting 10-30% glass fiber reinforced polycarbonate; the bottom case 1 of the piano body consists of a round barrel back 12, a handle 13 and a bottom case 14 of the piano head, wherein the round barrel back 12 is of a large-radian parabolic round back type structure, the middle of the round barrel back 12 is thick, the edge of the round barrel back is thin, the thickness of the thinnest part of the edge is 3.1mm, and the thickness of the thickest part of the middle is 3.9 mm; the back of the panel 2 is provided with a circle of outline reinforcing ribs 22 near the edge, the middle upper part of the panel 2 is provided with a sound hole 23, the back of the panel 2 is provided with left and right longitudinal reinforcing ribs 241 and 242 and upper and lower transverse reinforcing ribs 251 and 252 around the sound hole 23, the part of the panel 2, which is enclosed by the outline reinforcing ribs 22 and is below the lower transverse reinforcing ribs 252, is a vibration sound-emitting part 26, the thickness of the vibration sound-emitting part 26 is 1.2mm, the thickness of the part of the panel, which is enclosed by the outline reinforcing ribs 22 and is above the lower transverse reinforcing ribs 252, is 2.6mm, and the inner side of the vibration sound-emitting part 26 is provided with a 6 x 6 mesh sound beam 5 which is parallel and obliquely crossed at equal.
In the embodiment, the
In this embodiment, the
The present embodiment is suitable for the high-pitched ukulele, and the other three specifications ukulele include a middle-pitched, a secondary middle-pitched and a low-pitched ukulele, although the body sizes are different and the number of the combination of the mesh-shaped tone beams is also different, the shape and the internal structure are consistent with those of the high-pitched ukulele of the present embodiment, and thus, the detailed description thereof is omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
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