CN110288961A - Adjusting device for piano keyboard and method for adjusting using the same - Google Patents

Abstract

The invention discloses an adjusting device of a piano keyboard and an adjusting method using the device, which are used to solve the problem of unreasonable force on the existing device. The device includes a keyboard module, a sliding wooden frame and a key base. The sliding wooden frame is composed of a front horizontal wooden board, a middle horizontal wooden board, a rear horizontal wooden board and a longitudinal wooden board. An adjustment assembly is arranged on the front horizontal wooden board, and the adjustment assembly is applied to the front horizontal wooden board. The pressing force F2, the locking module Ⅰ applies a jacking force F1 to the front transverse plank, and the locking module II applies a downward pressure F4 to the front transverse plank, and the front, middle and rear transverse planks are respectively provided with copper jacking wires and Mounting holes for jacking screws, and apply an upward support force F3 to the front, middle, and rear transverse planks; a locking module II is also arranged on the rear side of the rear transverse planks. The technology of the present invention locks and fixes the position of the sliding wooden frame through the wedge-shaped mechanism. After locking, the force of the sliding wooden frame is more reasonable, and there is no internal stress. After debugging, the sound quality of the piano is obviously improved.

Description

Adjusting device for piano keyboard and method for adjusting using the same

technical field

The invention relates to the technical field of piano structure improvement.

Background technique

The shifting device of the piano keyboard has: a key base, a sliding wooden frame called a "horizontal plank", a shifting mechanism for sliding the sliding wooden frame, and a height direction position of the sliding wooden frame relative to the key base. Adjustable height position adjustment mechanism.

In the moving device with this structure, its advantages and disadvantages are described in detail in the patent document 200880011360.4, and Fig. 6 is a longitudinal sectional side view showing an example of a conventional piano keyboard shifting device. For example, one of the disadvantages is that the key base 109 and the sliding wooden frame 101 are basically made of wood, so they are affected by temperature, humidity and external force, and warping and twisting will subtly occur anyway. Therefore, there is a gap between the convex portion 107 of the sliding wooden frame 101 and the key base 109, and when a key is pressed, the lower surface of the sliding wooden frame 101 hits the upper surface of the key base 109 to generate a knocking sound, or smooth operation may not be expected. slide.

For another example, the second shortcoming is that when the two adjusting plate mounting screws 119, 121 are loosened subtly, the height position of the reference of the sliding wooden frame 101 will be staggered, and a gap will appear between the sliding wooden frame 101 and the key base 109, When a key is pressed, the lower surface of the sliding wooden frame 101 abuts against the upper surface of the key base 109 , which may also generate a knocking sound.

For the above-mentioned defects, in the 200880011360.4 document, Toyo Piano Manufacturing Co., Ltd. provided a feasible solution, which solved the above-mentioned two basic problems to a certain extent. However, it is undeniable that in this patent document There are still defects in the part that has been improved. The following is an analysis of the performance of this defect:

In the 200880011360.4 document, relying on the locking of the displacement guide screw 35, after the displacement guide screw 35 acts, the force acting on the sliding wooden frame is a positive pressure, and at the same time, the nearby fastening screw 41 acts on the sliding wooden frame. There is a reverse tension on the wooden frame. Therefore, there is a local stress on the sliding wooden frame. The existence of this stress causes serious deformation of the sliding wooden frame, which needs to be solved.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides an adjustment device for a piano keyboard and a method for adjusting it using the device, which can improve the force on the sliding wooden frame, avoid micro-deformation of the sliding wooden frame, and improve the performance of the piano. sound quality.

The technical scheme that the present invention solves its technical problem adopts is:

The adjustment device of the piano keyboard includes a keyboard module, a sliding wooden frame for installing multiple groups of keyboard modules, and a key base for installing the sliding wooden frame. The sliding wooden frame has the ability to adjust in the left and right directions, and has The adjustment ability, the sliding wooden frame is composed of the front horizontal plank, the middle transverse plank, the rear transverse plank and the longitudinal plank, it is characterized in that,

An adjustment assembly is provided on the front transverse plank, and the adjustment assembly applies downward pressure F2 to the front transverse plank,

Locking module I and locking module II are respectively fixed on the front and rear edges of the front transverse plank, wherein the locking module I applies a jacking force F1 to the front transverse plank, and the locking module II exerts a downward force on the front transverse plank. Press the pressure F4,

The front, middle and rear horizontal planks are respectively provided with copper top wires and top screw mounting holes, and an upward supporting force F3 is applied to the front, middle and rear horizontal planks;

A locking module II is also arranged on the rear side of the rear transverse plank.

The adjustment assembly includes a guide sleeve and a locking bolt, and the guide sleeve is installed in a long guide hole extending along the left-right direction X, and the locking bolt passes through the guide sleeve and is connected with the key base.

The guide sleeve and the long guide hole are stepped structures.

The locking module I includes a wedge block I and a screw I. There is a wedge portion on the wedge block I. The wedge portion is inserted into the wedge groove I on the front side of the front transverse plank, and is fastened to the key base by the screw I. superior.

The locking module II includes a wedge block II and a screw II, wherein the wedge block II is fixed on the key base through the screw screw II, and a wedge part II is arranged on the wedge block II, and the wedge part II is inserted into the front transverse plank In the wedge-shaped groove on the rear side of the keypad, it is fastened on the key base by screw II.

I and II in the wedge-shaped grooves have spaces for sliding along the Y direction.

The lower end surface of the copper top wire is a smooth arc surface.

The wedge block I and wedge block II are rubber blocks.

A method for adjusting the sound quality of a piano, characterized in that,

Firstly, pre-position the sliding wooden frame on the key base by using the locking module Ⅰ and locking module Ⅱ;

Then, preliminarily install the copper top wire and adjustment components on the sliding wooden frame;

Then, press the keyboard module, and adjust the copper top wire and the strength of the components according to the sound quality, and at the same time adjust the position of the sliding wooden frame in the left and right directions;

Finally, tighten the locking module Ⅰ and locking module Ⅱ to fix the sliding wooden frame on the key base.

The beneficial effects of the present invention are:

The technology of the present invention locks and fixes the position of the sliding wooden frame through the wedge-shaped mechanism. After locking, the force of the sliding wooden frame is more reasonable, and there is no internal stress. After debugging, the sound quality of the piano is obviously improved.

The adjustment is convenient and reliable, and can meet the needs of piano sound quality adjustment.

Description of drawings

Figure 1 is a perspective view of the device.

Fig. 2 is a partially enlarged view of A in Fig. 1 .

Figure 3 is a partial enlarged view of the device.

Figure 4 is an overall schematic diagram of the sliding wooden frame.

Fig. 5 is a schematic diagram of B - B in Fig. 4 .

Fig. 6 is an important sectional structural view of the present invention.

FIG. 7 is a partially enlarged view at D in FIG. 6 .

Figure 8 is a perspective view of the sliding wooden frame.

FIG. 9 is a perspective view I of the locking module I.

FIG. 10 is a perspective view II of the locking module I.

Fig. 11 is a side view of the locking module I.

Fig. 12 is a perspective view I of the locking module II.

Fig. 13 is a perspective view II of the locking module II.

Fig. 14 is a side view of the locking module II.

Figure 15 is a schematic diagram of the overall installation of the sliding wooden frame.

In the picture:

100 keypad modules,

200 sliding wooden frame, 210 front transverse plank, 211 guide long hole, 212 wedge-shaped groove, 220 middle transverse plank, 223 threaded hole, 230 rear transverse plank, 240 longitudinal plank, 290 action installation platform,

300 keybed, 310 brace, 320 damper rod rail mount, 330 threaded hole,

400 adjustment assembly Ⅰ, 410 guide sleeve, 420 locking bolt,

500 locking module Ⅰ, 510 wedge block Ⅰ, 511 wedge part, 512 long hole, 520 screw Ⅰ, 521 long hole,

600 locking module Ⅱ, 610 wedge block Ⅱ, 620 screw Ⅱ,

910 wire hole Ⅰ, 911 top wire Ⅰ.

Detailed ways

Below, taking the embodiment shown in Figures 1 to 15 as an example, the structure, principle and implementation rules of the present invention will be described in detail and specifically. This embodiment is a guiding implementation, not a strict assembly and manufacturing process. Readers should understand.

Definition of nouns:

White key, one of the function keys of the piano.

Black key, one of the function keys of the piano.

The adjusting device for a piano keyboard of the present invention is applicable to an upright piano or a grand piano having the following structure.

In the piano structure, a keyboard module 100 composed of white keys and black keys, and a sliding wooden frame 200 for installing multiple groups of keyboard modules 100, a key base 300 for installing a sliding wooden frame and other structural structures, a sliding wooden frame The 200 needs to have the ability to move and adjust in the left and right directions (X direction), as well as the ability to adjust in the height direction (Z direction). The pros and cons of these two adjustment capabilities directly affect the mystery of the piano's sound quality.

In the present invention, for the convenience of expression, the keyboard module is omitted in the views.

Usually, geometrically speaking, the sliding wooden frame 200 is called "horizontal plank", that is to say, it is a wooden frame structure, which is a necessary part in a piano, and the frame structure is composed of three transverse planks (X direction) and three longitudinal planks (Y direction), on the whole, it has the ability to move and adjust in the left and right directions, and has the ability to adjust in the height direction.

Functionally, the sliding wooden frame 200 is a horizontally arranged flat plate and a frame-like member that supports the white keys and black keys constituting the keyboard. Due to the need for sound quality, it must be made of wood and holes should be avoided as much as possible to avoid unnecessary impact on sound quality.

From the perspective of assembly relationship, the sliding wooden frame 200 is installed on the key base 300, and the assembly relationship requires a three-dimensional adjustment function, and the above-mentioned adjustment ability must be ensured during the installation process.

At the same time, in the process of installation and adjustment, it is best to keep the basic shape of the sliding wooden frame, and there should be no prestress inside, any prestress due to installation, for example, will have an adverse effect on the sound quality of the piano.

At the same time, in the process of installation and adjustment, it is best to maintain the delicate matching relationship between the sliding wooden frame and the key base, and maintain it.

For the key base 300, most of the upper surface of the key base is used to cooperate with the sliding wooden frame. At the same time, the support 310 upwards from the two ends of the upper surface of the key base 300 is the installation structure of other components. No longer.

From the point of view of the assembly relationship, the key base 300 is arranged on the support member on which the piano is installed. Generally, a damper rod rail support 320 and other components stand upward from the rear portion of the upper surface of the key base 300 . These are conventional functional structure layouts, which are common structures in piano structures, and will not be repeated here.

Each structure will be described in more detail below, especially the structure of the present invention will be described in detail.

The sliding wooden frame 200 is formed by integrally assembling the front horizontal wooden board 210, the middle horizontal wooden board 220, the rear horizontal wooden board 230 and the three vertical wooden boards 240 arranged in the front-rear direction Y (direction X). Bonded with a special adhesive, through the special sliding and adjusting structure in the present invention, the sliding wooden frame is an integral structure as a whole, and can be moved and adjusted as a whole. The sliding wooden frame is also a pre-assembled unit module, which is assembled and debugged after manufacture.

As shown in Figure 1, an action installation platform 290 is provided on the rear transverse plank 230 of the sliding wooden frame, and the action installation platform 290 is used for installing an action frame supporting the action, and will not be described in detail.

Six sets of adjustment assemblies I400 are arranged on the front transverse wooden board 210 of the sliding wooden frame 200. Under the action of the adjustment assembly I400, a downward pressure F2 is provided to the front horizontal wooden board. The adjustment assembly I is used in conjunction with each group. Assembly I400 involves the following components:

The long guide hole 211, the guide sleeve 410, and the locking bolt 420, wherein the long guide hole 211 is a stepped long hole extending along the left-right direction X, which itself belongs to a part of the front transverse plank 210, that is to say, the long guide hole The hole is one of the structures of the wooden front transverse plank. The guide slot 211 is a stepped hole in the depth direction. Referring to FIG. The shaft portion of the locking bolt 420 of the guide sleeve 410 is accommodated in the lower long hole with a small diameter. That is to say, there is indirect contact between the locking bolt 420 and the long guide hole 211 , but the transition is made through the guide sleeve. The setting of this structure is beneficial to the fine-tuning ability of the sliding wooden frame 200 along the left-right direction (X direction), or the possibility of fine-tuning.

Under the locking effect of the locking bolt, the locking of the sliding wooden frame can be realized. When adjustment is required, loosen the locking nut to adjust the left and right orientation. The adjustment process is reversible, and it is friendly Excellent adjustment operation convenience and high accuracy.

A wedge-shaped locking module I500 and a wedge-shaped locking module II600 are respectively arranged at the front and rear edges of the front transverse plank. The function and purpose of the wedge-shaped locking module I located at the front edge is to give the front transverse plank an upward lift Force F1, the jacking force F1 acts on the front edge of the front transverse plank, and forms a combination with the adjustment component I, which has a supporting and clamping effect on the front transverse plank, and through this combination, the front transverse plank can be effectively adjusted The degree of fitting with the upper surface of the key base 300, or the degree of adjusting the micro-gap.

Wedge locking module I500, in terms of structural composition, includes wedge block I510, screw I520, and threaded hole 330. Wedge block I510 is a rubber block with certain rigidity and elasticity. The wedge-shaped part 511, the wedge-shaped part 511 is used to be inserted into the front side wedge-shaped groove 212 of the front transverse plank 210, wherein the wedge-shaped part 511 and the front side wedge-shaped groove 212 of the front transverse plank are matched by a wedge-shaped surface, that is to say, When the wedge block I was engaged with the front transverse plank, the front transverse plank was pressed against the wedge portion 511 of the wedge block I. A clamping action, the generation of this clamping action makes the height of the front transverse plank adjustable, for example, moving the wedge block 1 to the direction close to the front transverse plank will make the front transverse plank 210 have a slightly lifting action, and then The height adjustment is realized, and the front transverse plank is kept at a reasonable gap or fitting tightness through the adjustment component I and the wedge locking module I500. Correspondingly, a horizontal elongated hole 512 is provided on the wedge block I 510, and the elongated hole is arranged along the Y direction, and a threaded hole 330 is correspondingly provided on the key base 300, through which the screw I 520 passes through the elongated hole 521 and The threaded hole 223 can realize the fixing and azimuth adjustment of the wedge block I 221 .

Correspondingly, the wedge-shaped groove 212 on the front side is arranged along the Y direction, which is consistent with the direction of the long hole, so as to reserve enough adjustment space for the front horizontal plank, which is one of the important conditions for adjusting the sound quality of the keys.

A thread hole I910 and a top thread I911 matched with the thread hole I are arranged on the front transverse plank, wherein the top thread I911 is made of brass, and the lower end of the top thread I911 fits on the secondary key base 300 to form a support point and Give an upward supporting force F3 to the front transverse plank.

The lower end surface of the top screw I911 is a sliding contact surface in sliding contact with the upper surface of the key base, which can be smoothly matched and adjusted. The lower end surface of the top screw is preferably designed as an arc surface to facilitate sliding fit in the left and right directions. The sliding is usually guided by the long guide hole, and the top wire I is a follow-up action.

The wedge-shaped locking module II600 includes a wedge block II610, a screw II620, and a threaded hole, wherein the wedge block II610 is fixed on the key base 300 through the screw II620, and a long hole is provided on the wedge block II610, and the front and rear directions can be adjusted. The wedge-shaped part of the wedge-shaped block II 610 is inserted into the slot of the front transverse plank to realize snap-fit connection.

Similarly, locking modules II 600 of the same structure are respectively arranged on the front and rear edges of the rear transverse plank to realize the fixing of the rear transverse formwork.

There are thread holes I910 on the rear and middle transverse planks, and the lower end of the top thread I911 matched with the thread holes I is attached to the slave key base 300 to form a support point and give the front transverse plank an upward direction. Support force F3.

Therefore, in the present invention, the sliding wooden frame 200 and the key base 300 are not provided with a direct sliding contact part, but the sliding wooden frame 200 and the key base 300 are arranged in a non-contact state through the gap S, and the gap S is determined by the tightening screw. The height of the lower end surface, the locking screw and the wedge blocks I and II on both sides are jointly determined.

Of course, it is also formed by cooperating with wedge block I and wedge block II.

In the present invention, the sliding wooden frame is adjustable and controllable installed through the locking modules, adjustment components and copper screws on the front, middle and rear transverse wooden boards working together on the sliding wooden frame.

Next, the method of adjustment using this device will be described,

Preliminary fixation of the sliding wooden frame:

(1) Installation of copper top wire Ⅰ 911

The installation process of the contact base pin is as follows: put the copper top wire into the front horizontal plank, the middle horizontal plank and the rear transverse plank from above. lower surface of the frame.

(2) Fixing of the sliding wooden frame, placing the sliding wooden frame on the key base, and temporarily fixing the sliding wooden frame on the key base 300 through the adjustment component I400.

(3) Fix the locking module Ⅰ500 and the locking module Ⅱ600 from the front and rear sides of the sliding wooden frame respectively, and fix them temporarily.

adjust:

Adjust the position of the top screw so that the top screw basically touches the key base, and adjust the tightness of the adjustment component I400. During this process, adjust the screw-in of the locking bolt 420 within the range where the sliding wooden frame can slide smoothly. situation, so that the gap between the lower end surface of the locking bolt 420 and the upper surface of the key base is infinitely close.

And determine the appropriate position according to the playing of the keys, and finally use the locking module I500 and locking module II600 on the side to lock the position, and basically fix it after locking.

The present invention can be used in a structure that slides to the left and right when the keyboard and the action are integrally assembled, and the structure and adjustment process is to lock the adjusted sliding wooden frame through the locking module I500 and the locking module II600 , After locking, in the case of the impact sound of the sliding wooden frame against the key base when the key is pressed.

The above adjustment process needs to be repeated in reality until the best sound quality is achieved.

The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, those skilled in the art may make various modifications and improvements to the present invention. All should fall within the scope of protection defined by the claims of the present invention.

Claims (9)

1. the regulating device of fingerboard, including Keysheet module, and the sliding wooden frame for installing multiple groups Keysheet module, and The keyseat of installation sliding wooden frame, the sliding wooden frame has the regulating power of left and right directions, and has in the height direction Regulating power, sliding wooden frame are made of preceding lateral plank, middle lateral plank, rear lateral plank and longitudinal plank, which is characterized in that

It is provided with adjusting component on lateral plank before described, lateral plank applies the pressure F2 pushed to the adjusting component forward,

It is fixed along locking module I respectively and locking module II in the front and rear side of preceding lateral plank, wherein the locking module I is given Preceding transverse direction plank applies the power F1 jacked up, and the locking module II applies the pressure F4 pushed to preceding lateral plank,

Before, during and after copper jackscrew and jackscrew mounting hole is respectively set on lateral plank, and before, during and after giving lateral plank apply it is upward Support force F3；

Locking module II is also equipped on rear side of rear lateral plank.

2. the regulating device of fingerboard according to claim 1, which is characterized in that the adjusting component includes guide sleeve And clamping screw, and guide sleeve is mounted in the long guiding hole extended along left and right directions X, the clamping screw passes through guide sleeve And it is connect with keyseat.

3. the regulating device of fingerboard according to claim 2, which is characterized in that the guide sleeve and long guiding hole are Step structure.

4. the regulating device of fingerboard according to claim 1, which is characterized in that the locking module I, including wedge shape Block I and screw I, have wedge-shaped part on wedge block I, before which is inserted into I in the wedge groove of the leading flank of transverse direction plank, and It is fastened on keyseat by screw I.

5. the regulating device of fingerboard according to claim 1, which is characterized in that the locking module II includes wedge shape Block II and screw II, wherein wedge block II is fixed on keyseat by screw screw II, is provided with wedge shape on wedge block II Portion II before the wedge-shaped part II is inserted into the wedge groove of the trailing flank of transverse direction plank, and is fastened on keyseat by screw II.

6. the regulating device of fingerboard according to claim 4 or 5, which is characterized in that I, II tool in the wedge groove There is the space slid along the Y direction.

7. the regulating device of fingerboard according to claim 1, which is characterized in that the lower end surface of the copper jackscrew is light Sliding arc surface.

8. the regulating device of fingerboard according to claim 1, which is characterized in that the wedge block I, wedge block II are Rubber block.

9. piano sound quality is adjusted using the regulating device of fingerboard described in any one of claim 1 to 8 Method, which is characterized in that

Firstly, wooden frame pre-determined bit will be slided on keyseat using locking module I and locking module II；

Then, copper jackscrew and preliminary being mounted on of adjusting component are slided on wooden frame；

Then, Keysheet module is pressed, and copper jackscrew is adjusted according to sound quality, adjusts the dynamics of component, while adjusting sliding wooden frame and existing The position of left and right directions；

Finally, fastening locking module I and locking module II are fixed on wooden frame is slided on keyseat.