CN210428781U - Grand piano central disk - Google Patents

Abstract

The utility model provides a grand piano center, it includes preceding center, well core, back center and banding, well core erects to keep off through well core and is connected with well core side, preceding center and well core joggle, well core and back center joggle, the banding opposite distribution is in well core both sides and preceding center front side, well core is formed by the solid plank joggle more than the three-layer, every layer of solid plank is spliced by a plurality of rectangle planks, well core contact stress face is the cambered surface, wholly adopt the wood preparation, the stability of piano center has been improved, wholly adopt the mode of joggle, noise when having reduced the piano and playing, it is little that the environment humiture changes to make the piano center, it is more stable to make the keyboard feel, the tone quality of piano playing has been improved on the whole.

Description

Grand piano central disk

Technical Field

The utility model relates to a piano part field, especially a grand piano center.

Background

At present, the traditional structures of the existing triangular musical instrument center plates on the market are basically the multilayer plate matched with a thin solid wood panel pressing or full solid wood finger joint plate center plate, and the center plate is easy to deform, has noise, is greatly influenced by the environment temperature and humidity, and has the defects of influence on the assembly of a keyboard string striking machine, poor keyboard hand feeling and playing sound color difference.

Chinese patent CN109159218A "a piano center" describes a piano center comprising upper and lower surface plates and a middle solid wood core plate, wherein the solid wood core plate is formed by sequentially overlapping and bonding at least two layers of solid wood panels, and each layer of solid wood panel is formed by bonding a plurality of rectangular solid wood small plates according to long edges. This patent is connected each wood structure of piano mediastinum with the mode of gluing, along with the lapse of time, receives the influence of temperature and humidity, and the mediastinum is split easily and is glued, has the noise to influence tone quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a grand piano center plate is provided, can non-deformable, improve piano tone quality.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a grand piano center, it includes preceding center, back center and banding, center erects to keep off through center and is connected with the center side, preceding center and center joggle, center and back center joggle, the banding opposite distribution is at center both sides and preceding center front side, center is formed by solid plank joggle more than the three-layer, every layer of solid plank is spliced by a plurality of rectangle planks, center contact stress face is the cambered surface.

In the preferred scheme, the mode that each layer of solid wood boards of the central core disc are spliced by a plurality of rectangular wood boards is spliced by butterfly wood pins.

In the preferred scheme, the vertical baffles of the central core disc are connected with the corrugated fingers on the side edges of the central core disc in a joggle mode, and the central core disc is connected with the vertical baffles of the central core disc in a joggle mode.

In the preferred scheme, the mode of the front middle disc and the middle disc in a joggle mode is a dovetail joggle, and the mode of the middle disc and the rear middle disc in a joggle mode is a dovetail joggle.

In a preferred scheme, the whole middle disc is pressed and formed by equipment.

In the preferred scheme, the whole middle disc is made of solid wood, and three solid wood materials with different hardness are adopted.

In the preferred scheme, two-millimeter gaps are reserved between the front middle disc and the central core disc, between the central core disc and the rear middle disc and between the central core disc and each rectangular wood board in a joggle mode.

The utility model provides a pair of grand piano center, through the scheme more than adopting, improved the stability of piano center, except banding and ripple indicate to connect, wholly adopt the mode of joggle, reduced the noise when the piano is played, make the piano center receive the environmental temperature and humidity change for a short time, center contact stress surface is the cambered surface, makes the keyboard feel more stable, has improved the tone quality that the piano was played on the whole.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a dovetail structure of the present invention;

FIG. 3 is a schematic view of the butterfly wooden pin splicing structure of the present invention;

FIG. 4 is a schematic view of the middle corrugation finger joint of the present invention;

fig. 5 is a schematic side view of the present invention.

In the figure: a front center 10; a core plate 20; a rear middle plate 30; a vertical stopper 21 of the central core disc; a central core side 22; and (6) sealing the edge 40.

Detailed Description

As shown in fig. 1 to 5, a grand piano central disc comprises a front central disc 10, a central disc 20, a rear central disc 30 and sealing edges 40, wherein the central disc 20 is connected with the side edges 22 of the central disc through central disc vertical baffles 21, the front central disc 10 is in joggle joint with the central disc 20, the central disc 20 is in joggle joint with the rear central disc 30, the sealing edges 40 are oppositely distributed on the two sides of the central disc and the front side of the front central disc 10, the central disc 20 is formed by joggle joint of more than three solid wood boards, each solid wood board is formed by splicing a plurality of rectangular wood boards, the contact stress surface of the central disc is an arc surface, the piano central disc is integrally connected in a joggle joint mode, only the sealing edges are connected in a glue brushing mode, the stability of the central disc is improved, noise is reduced, the piano is not easily influenced by temperature and humidity changes, the front central disc of the arc surface can be better attached to the piano keys, and the playing hand feeling is improved.

In the preferred scheme, the mode that each layer of solid wood boards of the central core disc 20 are spliced by a plurality of rectangular wood boards is butterfly wood pins, and the butterfly wood pins are spliced to strengthen the connection between the rectangular wood boards, so that the connection is more stable.

In the preferred scheme, the central core disc vertical baffle 21 is connected with the central core disc side 22 in a corrugated finger joint mode, the central core disc 20 is connected with the central core disc vertical baffle 21 in a joggle mode, each layer of solid wood of the central core disc 20 is further stabilized by the central core disc side 22, the central core disc 20 is also convenient to connect with the front central disc and the rear central disc, and a layer of thin glue can be brushed at the corrugated finger joint position in order to ensure the stability of the central core disc vertical baffle 21 and the central core disc side 22 in the corrugated finger joint mode.

In a preferred scheme, the mode of the front middle disc 10 and the middle core disc 20 in a joggle mode is a dovetail joggle, the mode of the middle core disc 20 and the rear middle disc 30 in a joggle mode is a dovetail joggle, the integrity of the piano can be ensured when wood expands or contracts, and the influence of temperature and humidity on the piano middle disc is reduced.

In the preferred scheme, the whole equipment press forming that adopts of well dish keeps the wholeness of piano well dish, conveniently is connected with other parts of piano.

In the preferred scheme, the middle disc is integrally made of solid wood, three solid wood materials with different hardness are adopted, the solid wood materials adopted by the front middle disc 10, the middle core disc 20 and the rear middle disc 30 are spruce, the spruce wood has fine grains, firm texture, moderate strength and hardness, excellent material quality, slight softness, straight and uniform grains, fine structure and good resonance performance, and is easy to process; the side edges 22 of the central core disc and the sealed edges 40 are made of maple wood, the maple wood is moderate in weight, fine in structure, easy to process and smooth in cutting surface; the solid wood material adopted by the vertical baffle 21 of the central core disc is beech, the beech material is hard, the texture is straight, the structure is thin, the wear resistance is realized, the appearance is glossy, and the baffle is not easy to deform when being dry, and the processing is convenient. The central disk is made of all solid wood, except the edge sealing 40 and the corrugated finger joint, other parts are connected in a joggle mode without glue brushing, and the texture of the tone quality of the piano is improved.

In the preferred scheme, two-millimeter gaps are reserved between the front middle disc 10 and the middle core disc 20, between the middle core disc 20 and the rear middle disc 30 and between the rectangular wood boards of the middle core disc 20 during joggling, so that the stability of joggling is prevented from being influenced by the change of the temperature and humidity of the middle disc.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (7)

1. The utility model provides a grand piano center, characterized by: the split joint type core plate comprises a front middle plate (10), a middle core plate (20), a rear middle plate (30) and sealing edges (40), wherein the middle core plate (20) is connected with the side edges (22) of the middle core plate through a middle core plate vertical baffle (21), the front middle plate (10) is in joggle joint with the middle core plate (20), the middle core plate (20) is in joggle joint with the rear middle plate (30), the sealing edges (40) are oppositely distributed on the two sides of the middle plate and the front side of the front middle plate (10), the middle core plate (20) is formed by joggle joint of three layers of solid wood plates, each layer of solid wood plate is spliced by a plurality of rectangular wood plates, and the contact stress surface of the middle plate is an arc surface.

2. The grand piano central disc of claim 1, wherein: the mode that each layer of solid wood board of the central core disc (20) is spliced by a plurality of rectangular wood boards is a butterfly wood pin.

3. The grand piano central disc of claim 1, wherein: the vertical baffle (21) of the central core disc is connected with the corrugated finger joint of the side edge (22) of the central core disc, and the central core disc (20) is connected with the vertical baffle (21) of the central core disc in a joggle joint mode.

4. The grand piano central disc of claim 1, wherein: the front middle disc (10) is in dovetail tenon joint with the middle core disc (20), and the middle core disc (20) is in dovetail tenon joint with the rear middle disc (30).

5. The grand piano central disc of claim 1, wherein: the whole central disk is pressed and formed by equipment.

6. The grand piano central disc of claim 1, wherein: the whole middle disc is made of solid wood, and three solid wood materials with different hardness are adopted.

7. The grand piano central disc of claim 1, wherein: two-millimeter gaps are reserved between the front middle disc (10) and the middle core disc (20), between the middle core disc (20) and the rear middle disc (30) and between the rectangular wood boards of the middle core disc (20) in a joggle mode.

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