CN219321049U - Electric piano with sound cavity - Google Patents

Abstract

The electric piano with the sound cavity comprises an electric piano body, wherein the electric piano body comprises a piano keyboard and a keyboard cover, and parallel plates used for fixing a battery box are arranged on the lower side of the piano keyboard; and a sound cavity is arranged at the sound outlet of the loudspeaker or/and one side opposite to the sound outlet. According to the utility model, through the sound cavity arranged at the sound outlet of the loudspeaker or/and at one side opposite to the sound outlet, sound waves formed by electronic sound emitted by the loudspeaker enter the sound cavity, and air in the sound cavity forms resonance along with the transmission of the sound waves; and the side wall of the sound cavity blocks the propagation path of sound waves, after the sound waves in the sound cavity collide with the inner wall of the sound cavity, a part of sound waves penetrate through the side plate of the sound cavity to enter the air, and a part of sound waves are folded back into the air in the sound cavity, so that the sound waves are rotated in the sound cavity to form an echo state, and the sound emitted by the electronic piano is more flexible and mellow and more pleasant.

Description

Electric piano with sound cavity

Technical Field

The utility model relates to the technical field of electric pianos, in particular to an electric piano with a sound cavity.

Background

An electric piano (Electronical piano) is an electroacoustic musical instrument. It is a musical instrument that has emerged in the sixty to seventy decades of the twentieth century and was popular in the early eighties to nineties for use in place of pianos in certain situations.

The utility model patent with the application number of 2019216706465 discloses an electronic piano with an intelligent switch, which comprises an electronic piano body, a keyboard cover and a photosensitive sensor P1, wherein the keyboard cover is arranged on the surface of the upper part of the inner side of the electronic piano body, the photosensitive sensor P1 is arranged on the lower surface of the keyboard cover, a control circuit is arranged on the electronic piano body, the control circuit arranged on the electronic piano body is composed of an integrated circuit U with the positive poles of the photosensitive sensor P1 and the positive poles of the photosensitive sensor P2 connected in the same direction, the positive poles of the P1 and the P2 are connected with R1 and R2, the GND connected with the negative poles of the P1 and the P2 is connected with an electrolytic capacitor C1 and a fixed capacitor C2, and the output end of the integrated circuit U is connected with a main board AMP inside the electronic piano body. The electronic piano of this intelligent switch can realize intelligent start and close to avoid the user to forget to close the power.

However, the sounding principle of the electronic piano is that the keyboard is used as an on-off switch to form electric pulses, once the key is pressed down, the crystal oscillator in the electronic piano starts to work to form pulses to generate waveforms with certain frequency, and then the waveforms are amplified by the frequency divider and sent to the loudspeaker to sound. The whole sounding process depends on a simple frequency division analog circuit, so that the sound emitted by the electronic piano is mechanically monotonous, and the tone quality effect is influenced.

Disclosure of Invention

Aiming at the technical problems, the technical scheme provides the electric piano with the sound cavity, and the sound emitted by the electric piano is more hollow, mellow and pleasant through the sound cavity arranged at the sound outlet of the loudspeaker; the problems can be effectively solved.

The utility model is realized by the following technical scheme:

an electric piano with a sound cavity comprises an electric piano body, wherein the electric piano body comprises a piano keyboard and a keyboard cover, and a loudspeaker and a parallel plate for fixing a battery box are arranged on the lower side of the piano keyboard; and a sound cavity is arranged at the sound outlet of the loudspeaker or/and one side opposite to the sound outlet.

Further, when the sound cavity box is arranged at the sound outlet of the loudspeaker, the sound inlet and the sound outlet are arranged on the sound cavity box, and the sound outlet of the loudspeaker is communicated with the sound inlet of the sound cavity box.

Further, the loudspeaker is fixedly arranged on the top surface of the parallel plate, a through hole is formed in the position, corresponding to the sound outlet of the loudspeaker, of the parallel plate, a sound cavity box is fixedly connected to the bottom of the through hole, and the top of the sound cavity box is communicated with the through hole; the loudspeaker sound outlet is fixedly attached to the upper side of the through hole, so that sound emitted by the loudspeaker sound outlet enters the sound cavity box through the through hole.

Further, a through hole is formed in the parallel plate, the loudspeaker is fixedly arranged in the through hole, a sound outlet of the loudspeaker is flush with the bottom surface of the parallel plate, a sound cavity box is fixedly connected to a position corresponding to the sound outlet of the loudspeaker, a top plate is arranged at the top of the sound cavity box, and a penetrating part penetrating through the top plate in any shape is arranged on the top plate; the loudspeaker sound outlet is fixedly attached to the position of the top plate, where the sound inlet is formed, so that sound emitted by the loudspeaker sound outlet enters the sound cavity box through the sound inlet.

Further, a sound outlet of the sound cavity box is arranged on the side wall or/and the bottom plate of the sound cavity box, and the sound outlet of the sound cavity box is a penetrating part with any shape penetrating through the side wall or the bottom plate of the sound cavity box; the top plate and the bottom plate of the sound cavity box are both thin plates.

Further, when the sound outlet of the loudspeaker and one side opposite to the sound outlet are provided with sound cavities, the middle part of the top surface of the parallel plate is fixedly connected with an inner measuring plate vertical to the parallel plate, and the inner measuring plate, the side plate, the front baffle plate, the rear side support plate, the bottom surface of the piano key keyboard and the parallel plate form a closed sound cavity; the sound inlet penetrating through the inner measuring plate in any shape is formed in the inner measuring plate, and the sound outlet of the loudspeaker is fixedly attached to the position of the sound inlet formed in the inner measuring plate, so that sound emitted by the sound outlet of the loudspeaker enters the sound cavity through the sound inlet.

Furthermore, on the inner measuring plate, a sound cavity sound outlet is arranged at a position which is not jointed by the loudspeaker sound outlet, and the sound cavity sound outlet is a penetrating part penetrating through the inner measuring plate in any shape.

Further, on the inner measuring plate, when the area of the sound inlet is larger than that of the sound outlet of the loudspeaker, the sound outlet and the sound inlet of the sound cavity are integrated; the loudspeaker is fixedly connected with the edge of the inner measuring plate through a connecting piece and a fastening piece.

Further, on the inner measuring plate, when the area of the sound inlet is smaller than that of the sound outlet of the loudspeaker, the sound inlet can be integral or split, and the sound cavity sound outlet and the sound inlet are split; the horn is fixed with the inner measuring plate through adhesive or a fastener.

Furthermore, a sound cavity sound outlet is arranged on the side plate and/or the front baffle plate and/or the rear side support plate and/or the parallel plate of the electric piano body at a position corresponding to the sound cavity, and the sound cavity sound outlet is a penetrating part penetrating through the side plate and/or the front baffle plate and/or the rear side support plate and/or the parallel plate of the electric piano body in any shape.

Furthermore, in the sound cavity, a baffle plate parallel to the inner measuring plate is fixedly arranged between the side plate and the inner measuring plate, and the baffle plate adopts a thin plate.

Further, when a sound cavity is arranged on one side of the loudspeaker opposite to the sound outlet; the middle part fixedly connected with perpendicular to parallel plate's interior measuring plate of parallel plate top surface, interior measuring plate and curb plate, preceding baffle, rear side backup pad, piano key keyboard's bottom surface and parallel form a confined sound chamber box.

Further, the loudspeaker is fixedly arranged at the position of the side plate or the front baffle plate or the position of the parallel plate corresponding to the sound cavity box; the side plate, the front baffle plate or the parallel plate is provided with a through hole, the loudspeaker sound outlet is fixedly arranged on the inner side wall of the side plate, the front baffle plate, the rear side support plate or the parallel plate through a fastener, and a dust cover is fixedly arranged at the position corresponding to the loudspeaker sound outlet.

Compared with the prior art, the electric piano with the sound cavity has the following beneficial effects:

(1) According to the technical scheme, through the sound cavity arranged at the sound outlet of the loudspeaker or at one side opposite to the sound outlet, sound waves formed by electronic sound emitted by the loudspeaker enter the sound cavity, and air in the sound cavity forms resonance along with transmission of the sound waves; and the side wall of the sound cavity blocks the propagation path of sound waves, after the sound waves in the sound cavity collide with the inner wall of the sound cavity, a part of sound waves penetrate through the side plate of the sound cavity to enter the air, and a part of sound waves are folded back into the air in the sound cavity, so that the sound waves are rotated in the sound cavity to form an echo state, and the sound emitted by the electronic piano is more flexible and mellow and more pleasant.

(2) The sound outlet on any side wall of the sound cavity box in the technical scheme is arranged, and after sound waves formed by electronic sounds emitted by the loudspeaker enter the sound cavity, the sound waves can be divided into multiple times of sound cavity boxes, so that sound emitted by the electronic piano is better in layering sense. Meanwhile, the sound cavity box and the sound outlet arranged on the side wall of the sound cavity box prolong the duration of sound.

(3) The lateral wall of sound chamber box adopts the setting of thicker panel in this technical scheme for after the sound wave that the electron sound that loudspeaker sent formed advances the sound intracavity, the lateral wall of striking the sound chamber box, thicker lateral wall has blocked the propagation path of sound wave, and the sound wave is in the air of touching the lateral wall back in the sound intracavity by the reflection, lets the sound wave carry out gyration in the sound intracavity, forms the echo state, makes the sound that the electronic piano sent more sky and more flexible, mellow.

(4) According to the technical scheme, the bottom plate on one side opposite to the sound outlet of the loudspeaker is provided with the thin plate, so that when sound waves emitted by the sound outlet of the loudspeaker strike the thin plate, a part of sound waves can penetrate through the thin plate and directly enter the air, and meanwhile, when the sound waves strike the thin plate, the thin plate can vibrate to form resonance, and tone can be further optimized.

(5) In this technical scheme baffle plate's setting, with sound cavity two sound cavity, simultaneously, the baffle plate is thinner panel and makes, when the sound that loudspeaker sent enters into in the sound cavity, can strike on the baffle plate for the baffle plate takes place to vibrate, forms the resonance body. The two sound cavity boxes are formed, so that the time of sound wave back-swinging in the sound cavity is further prolonged, and the tone of the sound cavity is further improved.

Drawings

Fig. 1 is a schematic external structure of embodiment 1.

Fig. 2 is a front view of embodiment 1 with the front baffle removed.

Fig. 3 is a schematic view showing the installation of the sound box and the horn in embodiment 2.

Fig. 4 is a schematic view of the distribution of the sound inlet of the top plate in example 2.

Fig. 5 is a schematic view showing the installation of the sound box and the horn in embodiment 3.

Fig. 6 is an external structural schematic diagram of embodiment 4.

Fig. 7 is a front view of embodiment 4 with the front baffle removed.

Fig. 8 is a structural diagram of an inner measuring plate in example 4.

Fig. 9 is a front view of the front baffle plate of embodiment 4 with a sound outlet.

Fig. 10 is a front view of embodiment 5 with the front baffle removed.

Fig. 11 is a structural diagram of an inner measuring plate in example 5.

Fig. 12 is a front view of embodiment 6 with the front baffle removed.

Fig. 13 is a structural diagram of an inner measuring plate in example 6.

Fig. 14 is a front view of embodiment 7 with the front baffle removed.

Fig. 15 is a structural diagram of an inner measuring plate in example 7.

Fig. 16 is a structural diagram of embodiment 8 formed on the basis of embodiment 4.

Fig. 17 is a structural diagram of embodiment 8 formed on the basis of embodiment 5.

Fig. 18 is a structural diagram of embodiment 8 formed on the basis of embodiment 6.

Fig. 19 is a structural diagram of embodiment 8 formed on the basis of embodiment 7.

Fig. 20 is an outline view of the whole structure of example 9.

Fig. 21 is a sectional view of the whole structure of example 9.

FIG. 22 is a cross-sectional view of the horn of example 10 mounted on the top surface of a parallel plate.

FIG. 23 is a cross-sectional view of the horn of example 10 mounted on the bottom surface of a parallel plate.

Fig. 24 is a sectional view of the whole structure of embodiment 11.

The marks in the drawings are: 1-electric piano body, 11-piano key keyboard, 12-keyboard lid, 13-curb plate, 14-front baffle, 15-rear side backup pad, 16-parallel plate, 161-through hole, 2-battery case, 3-loudspeaker, 31-loudspeaker sound outlet, 4-sound chamber box, 41-lateral wall, 42-bottom plate, 43-roof, 44-sound inlet, 45-sound outlet, 5-interior survey board, 6-connecting piece, 7-fastener, 8-baffle, 9-dust cover.

Description of the embodiments

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are only some, but not all, embodiments of the utility model. Various modifications and improvements of the technical scheme of the utility model, which are made by those skilled in the art, are included in the protection scope of the utility model without departing from the design concept of the utility model.

Example 1:

as shown in fig. 1 and 2, an electric piano with a sound cavity comprises an electric piano body 1, wherein the electric piano body 1 comprises a piano keyboard 11 and a keyboard cover 12, and a parallel plate 16 for fixing a loudspeaker 3 and a battery box 2 is arranged on the lower side of the piano keyboard 11; the loudspeaker 3 is provided with a sound cavity at the loudspeaker sound outlet 31, the sound cavity is provided with a sound inlet 44 and a sound outlet 45, and the loudspeaker sound outlet 31 is communicated with the sound inlet 44 of the sound cavity.

The loudspeaker 3 is fixedly arranged on the top surface of the parallel plate 16, a through hole 161 is formed in the parallel plate 16 at a position corresponding to the loudspeaker sound outlet 31, a sound cavity box 4 is fixedly connected to the bottom of the through hole 161, and the top of the sound cavity box 4 is communicated with the through hole 161; the speaker outlet 31 is fixedly attached to the upper side of the through hole 161, so that the sound emitted from the speaker outlet 31 enters the sound box 4 through the through hole 161.

A sound cavity box sound outlet 45 is arranged on any side wall of the sound cavity box 4, and the sound cavity box sound outlet 45 is a penetrating part with any shape penetrating through the side wall 41 of the sound cavity box 4; the sound outlet 45 of the sound cavity box can be a plurality of or a single round hole, an elliptical hole, a square hole, a rectangular hole and the like penetrating through the side wall of the sound cavity box 4, or can be a single or a plurality of strip-shaped holes, arc-shaped strips and the like; when the number of the sound outlets is multiple, the sound outlets can be regularly distributed according to the array, and can also be distributed according to aesthetic feeling with artistic features.

When the sound wave formed by the electronic sound emitted by the loudspeaker 3 enters the sound cavity, a part of sound wave is directly emitted from the sound outlet 45, which is the sound emitted by the first wave in the sound cavity. A portion of the sound waves then impinge on the side wall 41 and a portion of the sound waves impinging on the side wall 41 pass through the side wall 41 directly into the air, which is the sound emanating from the second wave in the acoustic cavity. Some of the sound waves striking the side wall 41 will bounce back into the air of the sound box 4 and then be transmitted from the sound outlet into the air, which is the sound of the third wave in the sound cavity. The last part of the sound waves impinges on the bottom plate 42, and part of the sound waves impinging on the bottom plate 42 pass through the bottom plate 42 and directly enter the air, which is the sound emitted by the fourth wave in the sound cavity. After some sound waves impinging on the bottom plate 42 will bounce back into the air of the sound box 4, some sound waves will directly exit from the sound outlet 45, and some sound waves will continuously impinge on the side wall 41, return to the air of the sound box 4, and finally propagate from the sound outlet 45 to the air. The sound outlet provided on the sound box 4 and the side wall 41 extends the duration of sound.

The side wall 41 of the sound cavity box 4 adopts thicker plates, the side wall 41 of the sound cavity box 4 adopts the arrangement of thicker plates, so that after sound waves formed by electronic sound emitted by the loudspeaker 3 enter the sound cavity, the sound waves collide with the side wall 41 of the sound cavity box 4, the thicker side wall 41 blocks the propagation path of the sound waves, after the sound waves collide with the inner wall of the side wall 41, the sound waves are reflected into the air of the sound cavity 4, the sound waves are enabled to rotate in the sound cavity to form an echo state, and the sound emitted by the electronic piano is more flexible and mellow.

The bottom plate 42 of the side of the sound cavity box 4 opposite to the loudspeaker sound outlet 31 is made of a thin plate. The bottom plate 42 opposite to the loudspeaker sound outlet 31 adopts the arrangement of the thin plate, so that when sound waves emitted by the loudspeaker sound outlet 31 strike the thin plate, a part of sound waves can penetrate through the thin plate and directly enter the air, and meanwhile, when the sound waves strike the thin plate, the thin plate can vibrate to form resonance, and tone color can be further optimized.

In the sound cavity box, the thickness of the side wall plate and the thickness of the bottom plate are set according to the power of the loudspeaker. In the embodiment, the power of the loudspeaker is 10-20W, and the thickness of the plate used by the side wall 41 of the sound cavity box is 3-10 mm; the thickness of the bottom plate of the sound cavity box is 0.5mm to 3mm.

Example 2:

the fixing of the horn 3 and the structure of the sonic box 4 can also be performed in the following manner on the basis of embodiment 1.

As shown in fig. 3, the parallel plate 16 is provided with a through hole 161, and the horn 3 is fixedly mounted in the through hole by a fastening device, or by adhesive, or directly by friction clamping, so that the horn sound outlet 31 is flush with the bottom surface of the parallel plate 16.

A sound cavity box 4 is fixedly connected to the position corresponding to the loudspeaker sound outlet 31, a top plate 43 is arranged at the top of the sound cavity box 4, and a penetrating part in any shape penetrating through the top plate 43 is arranged on the top plate 43; the speaker outlet 31 is fixedly attached to the top plate 43 at a position where the sound inlet 44 is provided, so that sound emitted from the speaker outlet 31 enters the sound box 4 through the sound inlet 44.

The sound inlet 44 on the top plate 43 can be a plurality of or a single round hole, an elliptical hole, a square hole, a rectangular hole and the like penetrating through the side wall of the sound cavity box 4, or can be a single or a plurality of strip-shaped holes, arc-shaped strips and the like; when the number of the sound inlet/outlet ports 44 is plural, the sound may be distributed regularly in an array or may be distributed in aesthetic sense with artistic features. The sound inlet 44 may also be distributed according to the horn outlet 31 in a 1:1 ratio. As shown in fig. 4.

The top plate 43 is a thin plate, and the thickness of the top plate is 0.5mm to 3mm; when the sound wave formed by the electronic sound emitted by the loudspeaker 3 hits the top plate 43, the top plate 43 can resonate under the impact of the sound wave, and compared with the sound cavity box 4 disclosed in the first embodiment, a resonance body is added in the embodiment; and the arrangement of the top plate 43 can adjust the speed of the electronic sound wave entering the sound cavity box 4 according to the area of the sound inlet 44. The propagation time of the electronic piano can be further prolonged to the sound emitted by the electronic piano, and the effect of further optimization can be achieved on the basis of embodiment 1.

Other structures of the present embodiment, and positional relationships and connection relationships between the structures are the same as those in embodiment 1, and a repetitive description thereof will not be given here.

Example 3:

as shown in fig. 5, on the basis of embodiment 2, the sound outlet 45 of the sound box 4 may also be provided on the bottom plate 42 of the sound box 4.

The tone color of this embodiment is slightly inferior to those of embodiment 1 and embodiment 2, but the tone color emitted from the electronic piano has been effectively improved as compared to the prior art. Therefore, the embodiment is also an effective improvement of the technical scheme.

Other structures of the present embodiment, and positional relationships and connection relationships between the structures are the same as those in embodiment 2, and a repetitive description thereof will be omitted.

Example 4:

on the basis of embodiment 1, the sound cavity may be provided at both the sound outlet and the side opposite to the sound outlet of the horn, and the fixation of the horn 3 and the structure of the sound cavity 4 may be performed in the following manner.

As shown in fig. 6-7; the middle part of the top surface of the parallel plate 16 is fixedly connected with an inner measuring plate 5 vertical to the parallel plate, and the inner measuring plate 5, the side plate 13, the front baffle 14, the rear side support plate 15, the bottom surface of the piano key keyboard 11 and the parallel plate 16 of the electric piano body 1 form a closed sound cavity box 4.

The inner measuring plate 5 is provided with a sound inlet 44 which penetrates through the inner measuring plate 5 and has any shape, and the area of the sound inlet 44 is equal to the area of the loudspeaker sound outlet 31; as shown in fig. 8.

The sound inlet 44 on the inner measuring plate 5 may be a plurality of or a single round hole, an elliptical hole, a square hole, a rectangular hole, etc. penetrating through the inner measuring plate 5, or may be a single or a plurality of strip-shaped holes, arc-shaped strips, etc. When the number of the sound inlets 44 is plural, the sound inlets may be regularly distributed in an array or may be distributed in an aesthetic sense with artistic features. And the sound inlets can be distributed according to the ratio of 1:1 according to the sound outlets of the loudspeaker.

The sound outlet 31 of the loudspeaker is fixedly attached to the position of the sound inlet 44 formed in the inner measuring plate 5 through adhesive or a fixing piece, so that sound emitted by the sound outlet 31 of the loudspeaker enters the sound cavity box 4 through the sound inlet 44.

The side plate 13 and/or the front baffle plate 14 and/or the rear side support plate 15 and/or the parallel plate 16 of the electric piano body 1 are provided with sound outlets 45 of the sound cavity box at positions corresponding to the sound cavity box 4, and the sound outlets 45 are penetrating parts penetrating through any shape of the side plate 13 and/or the front baffle plate 14 and/or the rear side support plate 16 and/or the parallel plate 16 of the electric piano body 1. The penetrating part can be a plurality of or a single round hole, an elliptical hole, a square hole, a rectangular hole and the like, and can also be a single or a plurality of strip-shaped holes, arc-shaped strips and the like; when the number of the sound outlets is multiple, the sound outlets can be regularly distributed according to the array, and can also be distributed according to aesthetic feeling with artistic features. The sound outlet holes which are designed on the front baffle or the side plate of the electronic piano are attractive, so that the aesthetic feeling of the electronic piano can be improved, and consumers can be attracted. As shown in fig. 9.

The interior survey board 5 adopts the panel that thickness is 1.5mm to 5mm, and the setting of interior survey board 5 is playing when sealed and fixed loudspeaker 3's effect, can also play the effect of resonance simultaneously. The resonance effect was similar to that of the top plate of the top of the acoustic chamber box in example 2 and example 3.

The front barrier in the present embodiment has a small width relative to the front barriers in the comparative documents 1 to 3; so that the distance from the bottom surface of the front barrier to the ground in this embodiment is larger than the distance from the front barrier to the ground in the comparative documents 1 to 3.

Other structures of the present embodiment, and positional relationships and connection relationships between the structures are the same as those in embodiment 1, and a repetitive description thereof will not be given here.

Example 5:

on the basis of embodiment 4, the sound inlet 44 of any shape penetrating the inner measuring plate 5 is formed on the inner measuring plate 5, and the area of the sound inlet 44 is smaller than the area of the horn sound outlet 31; as shown in fig. 10 and 11.

Other structures of this embodiment, and positional relationships and connection relationships between the structures are the same as those in embodiment 4, and a repetitive description thereof will be omitted.

Example 6:

the sound outlet 45 of the sound box 4 can also be provided on the inner measuring plate 5 on the basis of embodiment 4. The sound outlet 45 of the sound box 4 is provided in the inner measuring plate 6 at a position which is not bonded to the horn sound outlet 31, and the sound outlet 45 is a penetration portion having an arbitrary shape penetrating the inner measuring plate 5.

As shown in fig. 12 and 13, when the area of the sound inlet 44 is larger than the area of the horn sound outlet 31, the sound outlet 45 is integrated with the sound inlet 41; the horn 3 is fixedly connected with the edge of the inner measuring plate 5 through a connecting piece 6 and a fastening piece 7.

With respect to embodiment 4, when the sound outlet 45 of the sound box 4 is provided on the interior panel 5, the side panel 13, the front baffle 14, the rear side support panel 15, and the parallel panel 16 of the electric piano body 1 are not opened with the sound outlet 45.

Other structures of this embodiment, and positional relationships and connection relationships between the structures are the same as those in embodiment 4, and a repetitive description thereof will be omitted.

Example 7:

on the basis of embodiment 6, when the area of the sound inlet 44 on the inner measuring plate 5 is smaller than the area of the speaker sound outlet 31, the sound inlet 44 may be integral or split, and the sound outlet 45 and the sound inlet 44 of the sound cavity box 4 are split; as shown in fig. 14 and 15.

The horn 3 is fixed with the inner measuring plate 5 by glue or a fastener.

Other structures of this embodiment, and positional relationships and connection relationships between the structures are the same as those in embodiment 6, and a repetitive description thereof will be omitted.

Example 8:

on the basis of embodiments 4, 5, 6 and 7, in the acoustic cavity box 4, a baffle plate 8 parallel to the inner measuring plate 5 is fixedly installed between the side plate 13 and the inner measuring plate 5, as shown in fig. 16, 17, 18 and 19.

The baffle plate 8 is made of a thin plate, and the thickness of the baffle plate is 0.5mm to 3mm.

The baffle plate 8 divides the sound cavity box 4 into two sound cavities, and meanwhile, the baffle plate 8 is made of a thinner plate, namely, when sound emitted by the loudspeaker 3 enters the sound cavity, the sound can strike the baffle plate, so that the baffle plate vibrates to form a resonance body. The formation of two sound cavity boxes further prolongs the time of sound wave swinging in the sound cavity, and further improves the tone quality of the sound cavity on the basis of the embodiments 4, 5, 6 and 7.

Example 9:

in addition to the embodiment 1, the fixing manner of the speaker 3 and the structure of the acoustic cavity may be performed by providing the acoustic cavity on the side of the speaker 3 opposite to the sound outlet 31, specifically, by the following manner.

As shown in fig. 20 to 21, the middle part of the top surface of the parallel plate is fixedly connected with an inner measuring plate perpendicular to the parallel plate, and the inner measuring plate forms a closed sound cavity box with the side plate, the front baffle plate, the rear side support plate, the bottom surface of the piano key keyboard and the parallel plate of the electric piano body.

The loudspeaker 3 is fixedly arranged on the inner side surface of the front baffle through a fastener, a through hole is formed in the front baffle at a position corresponding to the loudspeaker sound outlet 31, a dust cover is fixedly arranged on the front baffle at a position corresponding to the loudspeaker sound outlet, and the dust cover is made of metal materials.

Example 10:

the horn 3 may be fixed in the following manner on the basis of example 9.

As shown in fig. 22 and 23, the sound box of the present embodiment is identical to that of embodiment 9, the horn 3 is fixedly mounted on the top surface of the parallel plate 16 or flush with the bottom surface of the parallel plate 16 by a fastener, through holes are formed in the parallel plate 16 at positions corresponding to the horn sound outlet 31, and a dust cover 9 is fixedly mounted on the parallel plate 16 at positions corresponding to the horn sound outlet 31.

Example 11:

the horn 3 may be fixed in the following manner on the basis of example 9.

As shown in fig. 24, the sound box of the present embodiment is identical to that of embodiment 9, the speaker 3 is fixedly mounted on the inner side surface of the side plate by a fastener, the side plate is provided with a through hole at a position corresponding to the speaker sound outlet 31, and a dust cover is fixedly mounted on the side plate at a position corresponding to the speaker sound outlet.

Example 12:

the horn 3 may be fixed in the following manner on the basis of example 9.

The sound box of this embodiment is consistent with embodiment 9, and loudspeaker 3 passes through the medial surface of fastener fixed mounting in the rear side backup pad, the rear side backup pad on, the position department corresponding to loudspeaker sound outlet 31 has seted up the through-hole, is located the rear side backup pad, the position department corresponding to loudspeaker sound outlet fixed mounting has the dust cover. The present embodiment is not illustrated.

The inventors performed experimental comparisons of the above examples to make the conclusion: the tone color of examples 1, 2, and 3 is the best, but the manufacturing cost is the highest; the tone scale of example 8, but the cost of fabrication is also the second rank; the tone colors of examples 4, 5, 6, and 7 are again made into the third bit line; the timbres of examples 9, 10, 11, 12 were lower than examples 1-8, but the cost of manufacture was also minimal.

Although the tone colors of examples 9, 10, 11, 12 are slightly worse than those of examples 1 to 8, the coefficients of the phase differences are smaller; can be detected by special equipment; and this embodiment has also effectively improved the tone color emitted from the electronic piano over the prior art. And the cost is the lowest, the inventor prefers the schemes of the embodiments 9, 10, 11 and 12.

Claims (10)

1. An electric piano with a sound cavity comprises an electric piano body (1), wherein the electric piano body (1) comprises a piano key keyboard (11) and a keyboard cover (12), and a loudspeaker (3) and a parallel plate (16) for fixing a battery box (2) are arranged on the lower side of the piano key keyboard (11); the method is characterized in that: and a sound cavity is arranged at one side of the sound outlet or/and the sound outlet of the loudspeaker (3).

2. An electric piano with acoustic cavity according to claim 1, characterized in that: when the sound outlet of the loudspeaker (3) is provided with the sound cavity box (4), the sound cavity box (4) is provided with a sound inlet (44) and a sound outlet (45), and the loudspeaker sound outlet (31) is communicated with the sound inlet (44) of the sound cavity box (4).

3. An electric piano with acoustic cavity according to claim 2, characterized in that: the loudspeaker (3) is fixedly arranged on the top surface of the parallel plate (16), a through hole (161) is formed in the position, corresponding to the loudspeaker sound outlet (31), of the parallel plate (16), a sound cavity box (4) is fixedly connected to the bottom of the through hole (161), and the top of the sound cavity box (4) is communicated with the through hole (161); the loudspeaker sound outlet (31) is fixedly attached to the upper side of the through hole (161), so that sound emitted by the loudspeaker sound outlet (31) enters the sound cavity box (4) through the through hole (161);

the side wall (41) or/and the bottom plate (42) of the sound cavity box (4) is provided with a sound outlet (45) of the sound cavity box (4), and the sound outlet (45) of the sound cavity box (4) is a penetrating part with any shape penetrating through the side wall (41) or the bottom plate (42) of the sound cavity box (4); the top plate (43) and the bottom plate (42) of the sound cavity box (4) are thin plates.

4. An electric piano with acoustic cavity according to claim 2, characterized in that: the loudspeaker is characterized in that a through hole (161) is formed in the parallel plate (16), the loudspeaker sound outlet (31) is fixedly arranged in the through hole (161), the loudspeaker sound outlet (31) is flush with the bottom surface of the parallel plate (16), a sound cavity box (4) is fixedly connected to the position corresponding to the loudspeaker sound outlet (31), a top plate (43) is arranged at the top of the sound cavity box (4), and a penetrating part penetrating through the top plate (43) in any shape is arranged on the top plate (43); the loudspeaker sound outlet (31) is fixedly attached to the position of the top plate (43) where the sound inlet (44) is arranged, so that sound emitted by the loudspeaker sound outlet (31) enters the sound cavity box (4) through the sound inlet (44);

the side wall (41) or/and the bottom plate (42) of the sound cavity box (4) is provided with a sound outlet (45) of the sound cavity box (4), and the sound outlet (45) of the sound cavity box (4) is a penetrating part with any shape penetrating through the side wall (41) or the bottom plate (42) of the sound cavity box (4); the top plate (43) and the bottom plate (42) of the sound cavity box (4) are thin plates.

5. An electric piano with acoustic cavity according to claim 1, characterized in that: when the sound outlet of the loudspeaker (3) and one side opposite to the sound outlet are both provided with sound cavities, the middle part of the top surface of the parallel plate (16) is fixedly connected with an inner measuring plate (5) perpendicular to the parallel plate (16), and the inner measuring plate (5) and the side plate (13), the front baffle (14), the rear side support plate (15), the bottom surface of the piano key keyboard (11) and the parallel plate (16) of the piano body (1) form a closed sound cavity box (4); the sound inlet (44) penetrating through the inner measuring plate (5) in any shape is formed in the inner measuring plate (5), and the loudspeaker sound outlet (31) is fixedly attached to the position, where the sound inlet (44) is formed in the inner measuring plate (5), so that sound emitted by the loudspeaker sound outlet (31) enters the sound cavity box (4) through the sound inlet (44).

6. An electric piano with acoustic cavity according to claim 5, characterized in that: the sound outlet (45) of the sound cavity box (4) is arranged on the inner measuring plate (5) at a position which is not jointed by the loudspeaker sound outlet (31), and the sound outlet (45) is a penetrating part with any shape penetrating the inner measuring plate (5);

when the area of the sound inlet (44) is larger than that of the loudspeaker sound outlet (31) on the inner measuring plate (5), the sound outlet (45) and the sound inlet (44) of the sound cavity box (4) are integrated; the loudspeaker (3) is fixedly connected with the edge of the inner measuring plate (5) through a connecting piece (6) and a fastening piece (7);

or when the area of the sound inlet (44) is smaller than that of the loudspeaker sound outlet (31), the sound inlet (44) can be integral or split, and the sound cavity sound outlet (45) and the sound inlet (44) are split; the loudspeaker (3) is fixed with the inner measuring plate (5) through adhesive or a fastener.

7. An electric piano with acoustic cavity according to claim 5, characterized in that: the side plate (13) and/or the front baffle plate (14) and/or the rear side support plate (15) and/or the parallel plate (16) of the electric piano body (1) are/is provided with a sound cavity sound outlet (45) at a position corresponding to the sound cavity, and the sound cavity sound outlet (45) is a penetrating part penetrating through any shape of the side plate (13) and/or the front baffle plate (14) and/or the rear side support plate (15) and/or the parallel plate (16) of the electric piano body (1).

8. An electric piano with acoustic cavity according to any one of claims 5-7, characterized in that: in the sound cavity box (4), a baffle plate (8) parallel to the inner measuring plate (5) is fixedly arranged between the side plate (13) and the inner measuring plate (5), and the baffle plate (8) adopts a thin plate.

9. An electric piano with acoustic cavity according to claim 1, characterized in that: when a sound cavity is arranged on one side of the loudspeaker (3) opposite to the sound outlet; the middle part of parallel plate (16) top surface fixedly connected with perpendicular to interior survey board (5) of parallel plate (16), interior survey board (5) and curb plate (13), front bezel (14), rear side backup pad (15), the bottom surface of piano key keyboard (11) and parallel (16) of electric piano body (1) form a confined sound chamber box (4).

10. An electric piano with acoustic cavity according to claim 9, characterized in that: the loudspeaker (3) is fixedly arranged at the position of the side plate (13) or the front baffle (14) or the parallel plate (16) corresponding to the sound cavity box (4); the side plate (13) or the front baffle (14) or the parallel plate (16) is provided with a through hole, the sound outlet of the loudspeaker (3) is fixedly arranged on the side plate (13) or the front baffle (14) or the rear support plate (15) or the parallel plate (16) through a fastener, and a dust cover is fixedly arranged at the position corresponding to the sound outlet of the loudspeaker (3).

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