Electronic piano sound box device

Abstract

The invention relates to an electronic piano sound box device, which is characterized by comprising a long groove body formed by splicing three long plates which are a lower crosspiece front plate, a lower crosspiece panel and a lower crosspiece rear plate; wherein two ends of the groove body are provided with edge supporting plates; the middle part of the groove body is provided with two middle supporting plates; a pedal set is connected between the two middle supporting plates; and two cover plates are arranged to respectively close a space formed by the edge supporting plates at the left and the right sides of the groove body, the middle supporting plates and the groove body so as to form two symmetrical sound box cavities which take the pedal set as the center. A certain inclined angle is formed between the lower crosspiece panel and the horizontal plane; the two ends of the lower crosspiece panel are symmetrically provided with loudspeaker holes and phase reversing holes; loudspeakers are respectively arranged on the loudspeaker holes on the lower crosspiece panel corresponding to the two sound box cavities; a short partition and a long partition are arranged to divide a phase reversing pipe in each loudspeaker cavity; and the phase reversing holes are communicated with the sound box cavities through the phase reversing pipe. Compared with the prior art, the electronic piano sound box device is novel and practical, and is capable of improving the loudspeaker effect and extending the function of the electronic piano as the active sound box.

Description

technical field [0001] The invention relates to the technical field of musical instruments, in particular to an electronic piano sound box device, in particular to the speaker sound box devices arranged on the left and right sides of the pedal structure at the lower end of the electronic piano. Background technique [0002] Electronic organ and electronic piano are electronic musical instruments that are produced by an electronic sound source, amplified by a circuit, and then output to a speaker for playback. The setting of the speaker and its installation structure directly affect the sound quality and sound effect of the electronic musical instrument. [0003] At present, the installation structures of speakers in electronic pianos and electronic pianos can be classified into two types: most of them are non-speaker structures, and a small part are speaker structures. The non-speaker structure means that the speakers are directly installed in the same piano box where the ke...

AI Technical Summary

Problems solved by technology

The non-speaker structure means that the speakers are directly installed in the same piano box where the keyboard is installed, that is, the left and right channel speakers are installed in the same larger, non-airtight resonance box, which cannot fully express the sound field width and sound effect of the left and right channels. ;Most electronic pianos install the left and right channel speakers directly on the bottom plate of the open piano box for the convenience of installation and visual appearance, so that the radiation direction of the speakers is downward, and the sound is reflected by the ground and transmitted to the human ear. , the sound wave is attenuated, and the acoustic effect is very poor; in order to improve the sound quality, some manufacturers install the smaller tweeter on the panel facing the performer, while the slightly larger woofer is still installed on the bottom plate of the piano box with holes due to volume limitations. The low frequency is not improved, and the acoustic effect is not satisfactory

The sound box structure refers to adding an independent sound box inside or outside the piano box with the keyboard on the electronic (steel) piano, that is, the sound box is surrounded by the board and the box body to improve the acoustic effect, especially the low-frequency sound quality; Due to the limited space of the speaker, the cavity is generally small, and the woofer is installed on the bottom plate of the piano box with openings, the sound radiates downward, and the sound effect is not ideal; the speaker attached to the outside of the piano box generally has a slightly larger cavity. It expands the volume of the piano box, which not only consumes the board, but also affects the visual effect

[0004] Usually, the power amplifier circuit and speaker of the electronic piano are only used to amplify and output the audio signal with the main board of the electronic piano as the sound source. Because the sound effect is not satisfactory, it is rarely used as the audio signal amplification and playback of other sound sources. The electronic piano power amplifier circuit and The use value and efficiency of the loudspeaker are limited

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