CN202816329U - Composite soundboard of piano - Google Patents
Composite soundboard of piano Download PDFInfo
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- CN202816329U CN202816329U CN 201220466956 CN201220466956U CN202816329U CN 202816329 U CN202816329 U CN 202816329U CN 201220466956 CN201220466956 CN 201220466956 CN 201220466956 U CN201220466956 U CN 201220466956U CN 202816329 U CN202816329 U CN 202816329U
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- soundboard
- lath
- central layer
- dash board
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Abstract
The utility model relates to the field of a wooden musical instrument, and provides a composite soundboard of a piano. The composite soundboard comprises a rectangular core board spliced by wood laths, a first surface board and a second surface board, wherein the core board is spliced by quarter-sawn spruce solid wood laths, quarter-sawn fir laths, paulownia or basswood laths in a side edge bonding manner according to the texture direction of the laths, and a first preset angle is maintained between each lath and the long edge of the soundboard; the laths comprise common laths and/or finger joint (or toe joint) laths; the first surface board and the second surface board are respectively glued with and fixedly connected with the upper surface and the lower surface of the core board and are respectively and seamlessly spliced by quarter-sawn fir laths according to a second preset angle maintained between each lath and the long edge of the soundboard; and the thickness of the first surface board is the same as that of the second surface board. According to the composite soundboard of the piano, the weather fastness of the composite soundboard can be improved, the cost can be reduced, materials are easier to choose, the surface appearance structure of the conventional soundboard can be met, and the tone quality can be improved.
Description
Technical field
The utility model relates to wooden musical instrument technical field, especially relates to a kind of complex soundboard of piano.
Background technology
The piano allow comprises several parts such as soundboard (Sound Board), stall bars (Rib), string code (Bridge), frame (Round), it accepts to strengthen from the vibration of string the resoance radiation of sound, according to the function of soundboard, it should meet following requirement: 1, the speed of conduction sound decays little soon.The mechanical energy that soundboard should be able to transmit string vibration is transformed into as far as possible acoustic energy propagates and is radiated in the air and goes, and has very low acoustic impedance and the less energy loss that causes because of internal friction.String should have graceful melodious tone color by soundboard enhanced rad sound out, enough brightness and persistence.2, can make the sound of different key mappings, have uniform sympathetic response.Soundboard should be not good to some acoustic radiating, and to other acoustic radiating poor performance.The sound wave phase differential at each position of soundboard is little.According to the structural principle of sympathetic response, soundboard is a dome-shaped diaphragm that radius is very large, and the physicist has done good research to its vibration performance, and the calculating on can doing mathematics, in practice, sometimes also uses these calculating.Such as: than Determination of Dynamic Elastic Modulus method, sound radiation quality constant method and acoustic impedance method etc.But because complicacy, allow structure singularity and the material anisotropy of soundboard vibration, two century-old many theories are sought, the regularity that not yet can form an absolute authority is summed up, and piano designs and produces the expert still needs to rely on the part experience to instruct the working practice of oneself.
The traditional fabrication of piano soundboard is to adopt the splicing of Pinaceae Picea solid wood quarter sawing lath, forms through fixed thick sanding again, and this wooden sound board has good acoustic quality characteristic, often is disposed at high-grade piano series.Oblique splicing is stressed in this soundboard lath splicing, all be to adopt logical material monoblock lath during splicing, particularly near the used lath of soundboard diagonal line, require lath longer, and wholely namely can not have any as the timber natural defects such as rotten, variable color, cracking, knot, annual ring with material, again density of wood, texture aberration there are strict demand, owing to require that particular care is given to selecting the ingredients in a subtle way, and grain of wood aberration etc. had strict restriction, so selection is very difficult; Secondly, traditional wooden sound board is because the harshness of selection, and required timber is very rare and expensive, has caused that cost is high, output is little.
The utility model content
The utility model proposes a complex soundboard of piano, easier selection reduces the cost that piano soundboard is made, the wildwood timber resources of saves valuable simultaneously.
In order to achieve the above object, the technical solution of the utility model is achieved in that
A kind of complex soundboard of piano comprises central layer, the first dash board and the second dash board; Described central layer is rectangle, is kept the first predetermined angle, is spliced by the side bonding according to its texture trend and the long limit of soundboard by the timber lath; Described timber lath comprises logical material lath and/or finger lath; Described the first dash board and described the second dash board are connected with the upper surface of described central layer, lower surface gummed respectively; The second predetermined angle is seamless spliced to be formed by keeping with the long limit of soundboard respectively by quarter sawing dragon spruce lath for described the first dash board and described the second dash board.
Wherein, described timber lath comprises quarter sawing dragon spruce lath, quarter sawing fir lath, paulownia or linden lath.
Wherein, described central layer is the uniform thickness setting, and described the first dash board is identical with the thickness of described the second dash board, and thickness is identical on the whole for described Complex soundboard; Perhaps described central layer is not uniform thickness setting, and its thickness reduces gradually along the central layer Width.
Wherein, the lath in the described central layer keeps 38 ° to 65 ° angle of inclination splicings by its texture trend and the long limit of soundboard; Perhaps, the lath in the described central layer parallels splicing by its texture trend with the long limit of soundboard; Perhaps, the lath in the described central layer is by its texture trend and the vertical direction splicing of the long limit of soundboard.
Wherein, second predetermined angle on the long limit of the veneer in described the first dash board, described the second dash board and described soundboard, and the lath in the described central layer and described soundboard grow the first predetermined angle poor on limit, is 5 ° to 20 °.
Wherein, the second predetermined angle that the long limit of the veneer in described the first dash board and soundboard keeps is 38 ° to 55 °, and second predetermined angle on the long limit of the veneer in described the second dash board and described soundboard is-38 ° to-55 °.
Wherein, the finger lath in the described central layer is with the raked joint plane or mill bonding the forming of tenon tongue and groove piece mode.
Wherein, when described central layer uniform thickness arranged, the thickness of described central layer was 5.0 millimeters to 8.5 millimeters.
Wherein, when described central layer when uniform thickness does not arrange, the shape of cross section of described central layer on its Width is isosceles trapezoid or right-angled trapezium, its thickest end is 7 millimeters to 9 millimeters, the thinnest end is 5.5 millimeters to 7.5 millimeters.
Wherein, the thickness of described the first dash board and described the second dash board is 0.5 millimeter to 2.0 millimeters; Long 1440 millimeters-1600 millimeters of described soundboard, wide 920 millimeters-1100 millimeters.
As seen, the utility model has following beneficial effect at least:
1, a kind of complex soundboard of piano of the present utility model, adopt the first dash board, the second dash board and core plate three-layer crosswise lamination to form, the ability to bear that climate change, temperature humidity are changed significantly improves, solved preferably distortion and the serious cracking quality problems of soundboard, made piano have good weather resistance;
2, test data shows, the oscillatory property of quarter sawing dragon spruce is very good.It is suitable to take thickness such as soundboard, and slightly inching stall bars camber is soundboard dome radian, and the optimal acoustic quality appears in musical instrument.Complex soundboard structurally is three layers of crosswise lamination, can improve all neat coefficients of soundboard intensity, so better help stall bars will vibrate in the short time along wood grain in length and breadth at the utmost point and be transmitted to whole soundboard, therefore this dome-shaped diaphragm of soundboard homogeneous more, more approach desirable vibration coating materials level, utilize piano volume and the tenuto of Complex soundboard all good, therefore, it is bright to have improved the instrument tamber sound;
3, because the first dash board and the second dash board few with the material amount, ratio is little, it is easier to obtain the surface label plane materiel, and aberration, annual ring etc. only affect sense organ, do not affect the resonance performance, these timber can be used for central layer, and tiny natural defect can also adopt to mend by replacing a damaged part and be used in addition, the soundboard of making has not only promoted surface quality and outward appearance class, has reduced simultaneously about 30% cost;
4, because central layer also can adopt finger lath spreading to form, short flitch bar is connected into qualified lath by finger technique is used, reduce the severity of lath selection, thereby further reduced production cost.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 to Fig. 3 is the front view of three embodiment of the present utility model;
Fig. 4 is the left view of central layer uniform thickness embodiment of the present utility model;
Fig. 5 is the not left view of an embodiment of uniform thickness of central layer of the present utility model;
Fig. 6 is the not left view of another embodiment of uniform thickness of central layer of the present utility model;
Fig. 7 to Figure 10 is four kinds of forms of milling the tenon tongue and groove between central layer lath of the present utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of complex soundboard of piano, comprises central layer 2, the first dash board 1 and the second dash board 3.
Described central layer 2 is rectangle, is kept the first predetermined angle, is spliced by the side bonding according to its texture trend and the long limit of soundboard by the timber lath.
Preferably, in the utility model embodiment, described central layer 2 keeps the first predetermined angle to be spliced by quarter sawing dragon spruce (Picea) lath, quarter sawing fir (Abies) lath, paulownia (Paulownia) or linden (Tilia) lath according to its texture trend and the long limit of soundboard.
Preferably, described timber lath comprises logical material lath and/or finger lath, and preferably, described finger lath is Type B finger lath.
Be that described central layer can all adopt the splicing of finger lath, perhaps all adopt logical material lath, logical material lath perhaps is set between the finger lath.Described finger lath is spliced for the lath that will lack by finger technique.
Preferably, the finger lath of described central layer and logical material lath interval arrange, and a logical material lath namely is set between two finger laths.
The second predetermined angle is seamless spliced to be formed by keeping with the long limit of soundboard respectively by quarter sawing dragon spruce lath for described the first dash board and described the second dash board.
In the utility model embodiment, described paulownia or linden lath can be quarter sawing and also can be flat-cut.Soundboard must have transaudient speed fast (rift grain approximately〉5000m/s) with timber, and rationally (rift grain is about 120*10 to Determination of Dynamic Elastic Modulus
3Kgf/cm
2), the acoustic qualities such as vibration damping little (the logarithm reduction is about 0.022), soundboard timber is a conduct vibrations and attenuation process to the conduction of sound.Evidence, the sound conduction of timber are subjected to the microstructure of lumber fibre length, wood cell and sound wave along the factor affecting such as the direction of propagation of lumber fibre; The factor analysis such as the general and water percentage of timber sound conduction attenuation rate, fiber orientation.And the aforementioned conventional way is not deliberately stressed and is adopted the quarter sawing veneer splicing, and practice confirms, the quarter sawing dragon spruce is the optimal material of making piano soundboard, therefore preferred quarter sawing dragon spruce.
To shown in Figure 3, described central layer 2 is spliced by long limit perpendicular mode, parallel mode or the oblique mode of its texture trend with soundboard by above-mentioned various laths referring to Fig. 1, and namely described the first predetermined angle can be right angle, the straight angle or acute angle.The concrete numerical value of the first predetermined angle can be made adjustment according to actual conditions by those skilled in the art, and the utility model is not done restriction.
When adopting oblique connecting method, preferably, the lath in the described central layer 2 is 38 ° to 65 ° by its texture trend with the angle of inclination that the long limit of soundboard keeps, and preferably, is 50 ° to 55 °.
Also comprise the first dash board 1 and the second dash board 3, described the first dash board 1 and described the second dash board 3 are connected with the upper surface of described central layer 2, lower surface gummed respectively.
In the utility model embodiment, as a kind of embodiment, referring to shown in Figure 4, described central layer 2 is the uniform thickness setting, and described Complex soundboard on the whole thickness is identical.Preferably, the thickness of described central layer 2 is 5.0 millimeters to 8.5 millimeters, more preferably, is 6.0 millimeters to 6.5 millimeters.
As another kind of embodiment, described central layer 2 is not uniform thickness setting, and its thickness reduces gradually along central layer 2 Widths.Preferably, referring to Fig. 5 and shown in Figure 6, the shape of cross section of described central layer 2 on its Width is isosceles trapezoid or right-angled trapezium, its the thickest end is 7 millimeters to 9 millimeters, more preferably, be 7.8 millimeters to 8.2 millimeters, the thinnest end is 5.5 millimeters to 7.5 millimeters, more preferably, be 6.2 millimeters to 6.6 millimeters.
Described the first dash board 1 and described the second dash board 3 all have quarter sawing dragon spruce lath respectively by keeping the second predetermined angle to be spliced with the long limit of soundboard, and described the first dash board 1 is identical with the thickness of described the second dash board 3.
In the utility model embodiment, preferably, the thickness of described the first dash board 1 and described the second dash board 3 is 0.5 millimeter to 2.0 millimeters, is preferably 0.8 millimeter to 1.2 millimeters.
Preferably, the second predetermined angle that the long limit of the veneer in described the first dash board 1 and soundboard keeps is 38 ° to 55 °, and more preferably, the inclination angle of veneer is 42 ° in described the first dash board 1; Second predetermined angle on the long limit of the veneer in described the second dash board 3 and described soundboard is-38 ° to-55 °, more preferably, the inclination angle of veneer is-42 ° in described the second dash board 3, on, the texture of the second dash board 3 moves towards identical, namely walk always from texture, the soundboard front view is identical with rear view, in other words, if the texture trend is 42 ° with the long limit of soundboard angle in the front view, then texture trend and the long limit of soundboard angle are 138 ° namely-42 ° (for just, the texture trend is equivalent to veneer to the inclination angle on soundboard length limit with the angle on the long limit of soundboard to angle with counterclockwise) in the rear view.
Those skilled in the art can make adjustment to the second predetermined angle according to actual conditions according to technical conceive of the present utility model, all should belong to protection domain of the present utility model.
In the utility model embodiment, preferably, second predetermined angle on the long limit of the veneer in described the first dash board 1, described the second dash board 3 and described soundboard, poor with first predetermined angle on lath in the described central layer 2 and the long limit of described soundboard, being 5 ° to 20 °, more preferably, is 8 ° to 15 °, optimally, be 10 ° to 15 °.
In the utility model embodiment, finger lath in the described central layer 2 is with the raked joint plane or mill bonding the forming of tenon tongue and groove piece mode, referring to Fig. 7-Figure 10, Fig. 7 to Figure 10 shows between four kinds of central layer 2 laths and mills tenon tongue and groove connecting method, and wherein the tongue and groove angle among Fig. 7 is 52 °.
In the utility model embodiment, preferably, long 1440 millimeters-1600 millimeters of described soundboard, wide 920 millimeters-1100 millimeters.
During making, dash board requires: quarter sawing veneer texture is perfectly straight, and evenly the annual ring exquisiteness is clear, and color and luster is unified, and material zero defect, the veneer of one section dragon spruce initiative band together with convenient flower piece, water percentage≤8%.The tight seam of jigsaw is firm, and band is decided thick sanding back plane degree, smooth finish is good.
With dash board and central layer 2 veneers, under preference temperature, pressure, glue together at last.Since the resonance wood water percentage at 6-7% for well, so damp-prrof packing as early as possible after soundboard is made is in time supplied the utilization of piano factory.
The soundboard weatherability that the traditional fabrication method is made is poor, and soundboard is woodwork, the variation of timber with geographic location, and the variation of environment temperature and humidity can deform, even cracking, causes whole piano not use.
Adopt traditional fabrication method selection difficulty, cost is higher, the waste timber resources.
Complex soundboard of piano provided by the utility model, adopt the first dash board 1, the second dash board 3 and 2 three layers of crosswise lamination of central layer to form, the ability to bear that climate change, temperature humidity are changed significantly improves, and has solved preferably distortion and the problem of Cracking of soundboard, namely has good weather resistance; Secondly, because upper, the inclination angle of the inclination angle of veneer and central layer 2 middle plate strips is incomplete same in the second dash board 3, different is arranged, this architectural feature, improved whole soundboard along timber across grain Vibration propagation speed and efficient, make soundboard each to homogeneous more, more be tending towards desirable vibrating diaphragm, the transaudient speed difference of timber band and rift grain is very big, the transaudient speed of its rift grain is far longer than the transaudient speed of band, be 5298m/s such as the transaudient speed of the rift grain of fish scale dragon spruce, and the transaudient speed of across grain only is 783m/s, and soundboard need to satisfy when accepting the string vibration, and all directions of soundboard are all vibrated the job requirement of getting up; This functional requirement is by the stall bars conduction of laterally putting up a bridge, the splicing of central layer 2 lath tongue and grooves has increased plate Contact face and has improved conduction efficiency, add the gross area cross lamination gummed of Face veneer, the final adjustment realizes that each is to equal neat coefficients, make soundboard become more uniform vibrating diaphragm, improved the anisotropy of material, thereby the utility model acoustical behavior and the quality of soundboard have been improved; Again, central layer 2 is no longer overcritical aspect color and luster, annual ring, tiny defect, makes more economical rationality of selection; The single lath of central layer can utilize and save timber resources better with short material by finger technique spreading, reduces cost of products.
It should be noted that at last: above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although with reference to previous embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a complex soundboard of piano is characterized in that, comprises central layer, the first dash board and the second dash board;
Described central layer is rectangle, is kept the first predetermined angle, is spliced by the side bonding according to its texture trend and the long limit of soundboard by the timber lath; Described timber lath comprises logical material lath and/or finger lath;
Described the first dash board and described the second dash board are connected with the upper surface of described central layer, lower surface gummed respectively;
The second predetermined angle is seamless spliced to be formed by keeping with the long limit of soundboard respectively by quarter sawing dragon spruce lath for described the first dash board and described the second dash board.
2. complex soundboard of piano according to claim 1 is characterized in that, described timber lath comprises quarter sawing dragon spruce lath, quarter sawing fir lath, paulownia or linden lath.
3. complex soundboard of piano according to claim 1 is characterized in that, described central layer is the uniform thickness setting, and described the first dash board is identical with the thickness of described the second dash board, and thickness is identical on the whole for described Complex soundboard;
Perhaps described central layer is not uniform thickness setting, and its thickness reduces gradually along the central layer Width.
4. complex soundboard of piano according to claim 1 is characterized in that, the lath in the described central layer keeps 38 ° to 65 ° angle of inclination splicings by its texture trend and the long limit of soundboard;
Perhaps, the lath in the described central layer parallels splicing by its texture trend with the long limit of soundboard;
Perhaps, the lath in the described central layer is by its texture trend and the vertical direction splicing of the long limit of soundboard.
5. complex soundboard of piano according to claim 1, it is characterized in that, second predetermined angle on the long limit of the veneer in described the first dash board, described the second dash board and described soundboard, and the lath in the described central layer and described soundboard grow the first predetermined angle poor on limit, is 5 ° to 20 °.
6. complex soundboard of piano according to claim 1, it is characterized in that, the second predetermined angle that the long limit of veneer in described the first dash board and soundboard keeps is 38 ° to 55 °, and second predetermined angle on the long limit of the veneer in described the second dash board and described soundboard is-38 ° to-55 °.
7. complex soundboard of piano according to claim 1 is characterized in that, the finger lath in the described central layer is with the raked joint plane or mill bonding the forming of tenon tongue and groove piece mode.
8. complex soundboard of piano according to claim 2 is characterized in that, when described central layer uniform thickness arranged, the thickness of described central layer was 5.0 millimeters to 8.5 millimeters.
9. complex soundboard of piano according to claim 2, it is characterized in that, when described central layer when uniform thickness does not arrange, the shape of cross section of described central layer on its Width is isosceles trapezoid or right-angled trapezium, its the thickest end is 7 millimeters to 9 millimeters, and the thinnest end is 5.5 millimeters to 7.5 millimeters.
10. each described complex soundboard of piano is characterized in that according to claim 1-9, and the thickness of described the first dash board and described the second dash board is 0.5 millimeter to 2.0 millimeters;
Long 1440 millimeters-1600 millimeters of described soundboard, wide 920 millimeters-1100 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220466956 CN202816329U (en) | 2012-09-13 | 2012-09-13 | Composite soundboard of piano |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220466956 CN202816329U (en) | 2012-09-13 | 2012-09-13 | Composite soundboard of piano |
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| CN202816329U true CN202816329U (en) | 2013-03-20 |
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| CN 201220466956 Expired - Fee Related CN202816329U (en) | 2012-09-13 | 2012-09-13 | Composite soundboard of piano |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637468A (en) * | 2013-11-13 | 2015-05-20 | 菲茨奥丽钢琴股份公司 | Sounding board for musical instruments |
| CN107452356A (en) * | 2017-07-14 | 2017-12-08 | 海伦钢琴股份有限公司 | A kind of compound string code manufacturing process |
| CN109065002A (en) * | 2018-09-20 | 2018-12-21 | 宜昌金宝乐器制造有限公司 | Application of the housed joint wooden sound board on piano |
| CN109159218A (en) * | 2018-09-03 | 2019-01-08 | 黄雪侨 | A kind of Piano central disk |
-
2012
- 2012-09-13 CN CN 201220466956 patent/CN202816329U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637468A (en) * | 2013-11-13 | 2015-05-20 | 菲茨奥丽钢琴股份公司 | Sounding board for musical instruments |
| CN104637468B (en) * | 2013-11-13 | 2018-10-09 | 菲茨奥丽钢琴股份公司 | Musical instrument resonator |
| CN107452356A (en) * | 2017-07-14 | 2017-12-08 | 海伦钢琴股份有限公司 | A kind of compound string code manufacturing process |
| CN109159218A (en) * | 2018-09-03 | 2019-01-08 | 黄雪侨 | A kind of Piano central disk |
| CN109065002A (en) * | 2018-09-20 | 2018-12-21 | 宜昌金宝乐器制造有限公司 | Application of the housed joint wooden sound board on piano |
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