JPH01321479A - Keyboard musical instrument - Google Patents

Abstract

PURPOSE:To enable a player to grasp a play tone directly and clearly by setting the standing angle of a large-diameter speaker unit smaller than that of a small-diameter speaker unit. CONSTITUTION:The woofer unit 15A and tweeter unit 15B are arranged behind the keyboard 13 of a main body case 11 and the woofer unit 15A is larger in diameter and smaller in tilt angle than the tweeter unit 15B. Then both speaker units 15A and 15B are stood so as to sound forward, the axis of the diaphragm of the small-diameter tweeter unit 15B is directed to a tone escape 31, and the axis of the diaphragm of the large-diameter woofer unit 15A is directed to a case slightly above the tone escape 31. Consequently, the player can grasp the play tone directly and clearly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric keyboard instrument or an electronic keyboard instrument in which a speaker is mounted near the keyboard section, and by erecting the speaker toward the front keyboard, the player can hear the sound of the performance. This makes it possible to understand the sound quality more clearly.

[Conventional technology]

In conventional electric keyboard instruments or electronic keyboard instruments that have a built-in speaker, the speaker unit has been disposed at the rear of the keyboard section in order to make the keyboard instrument thinner.

These speaker units have various sounding directions (the axial direction of the diaphragm). For example, an opening or slit (tone escape) is formed on the top surface of the instrument main case, and the diaphragm of the speaker is directed toward this slit. It was placed almost horizontally.

Furthermore, in other electric keyboard instruments or electronic keyboard instruments, the speakers are arranged so as to emit sound toward the rear of the main body case. That is, the tone escape was arranged so as to open toward the side opposite to the player.

[Problem to be solved by the invention]

However, with such a conventional speaker arrangement, it is difficult for the performer to directly grasp the sound quality of the pronunciation. The sound of the performance was determined by the sound reflected from the wall at the rear of the instrument. Further, peripheral devices such as MIDI devices cannot be placed on the main body case, for example.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a keyboard instrument that allows a player to directly and clearly grasp the sound of a performance, and that is thin and allows peripheral equipment to be placed on the top surface of the case of the instrument. It is said that

[Means to solve the problem]

The present invention includes a box-shaped main body case, a keyboard disposed on the front side of the main body case, a tone escape formed to open toward the front side in the main body case, and a keyboard arranged in the main body case. A keyboard instrument includes a speaker unit that stands upright on the rear side and has an axis of a diaphragm oriented toward the tone escape, and the speaker unit includes a large-diameter speaker unit and a small-diameter speaker unit. The large-diameter speaker unit has a smaller standing angle than the small-diameter speaker unit.

[Effect]

In the keyboard instrument according to the present invention, desired sound is produced from the sound generating section via the speaker unit by playing the keyboard or by operating various switches. In other words, a large-diameter speaker unit produces low-pitched sounds, and a small-diameter speaker unit produces high-pitched sounds.

This sound is produced by vibrating the diaphragm of each speaker unit. At this time, the axis of the diaphragm of each speaker of the speaker unit is oriented toward tone escape. Also,
Tone Escape opens toward the front of the main case. As a result, the performance sound directly reaches the player, and the player can clearly understand this.

Additionally, peripheral devices and the like can be placed on the top surface of the main body case. Furthermore, since the large-diameter speaker unit is placed laterally than the small-diameter speaker unit, the main body case can be formed to be thin.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 and 2 show a first embodiment of a keyboard instrument according to the present invention.

As shown in these figures, the electronic keyboard instrument has a box-shaped main body case 11. A keyboard 13 and a speaker unit 15 are arranged inside the main body case 11.

That is, a keyboard 13 is disposed on the front side of the main body case 11 so as to be swingable in the vertical direction. tone escape 3
1 is open at the top on the rear side of the keyboard 13.

The keyboard 13 is made up of a plurality of keys 21 arranged side by side, and each key 21 is supported at its rear end so as to be swingable about a pin 22 as a fulcrum. A switch for detecting the depression of the key 21, a switch for detecting the strength of the key depression, etc. are arranged around the key 21.

A speaker unit 15A for bass sounds and a speaker unit 15B for treble sounds are provided on the rear side of the keyboard 13 of the main body case 11, respectively. These speaker units 1
5A and 15B are horizontal surfaces, for example, the main body case 11
It is erected and tilted at a predetermined angle with respect to the lower surface of the. 23 is a bracket for fixing these speaker units 15A and 15B.

The speaker unit (squawker or woofer) 15A for medium or low sounds is the same as the speaker unit for high sounds (
It has a larger diameter than the tweeter 15B, and the angle of inclination is smaller than that for high-pitched sounds (see Fig. 1). For example, the diameter of tweeter 15B is 12 cm, and the diameter of squawker is 2 cm.
It is 0 cm.

Both of these speaker units 15A and 15B are erected so as to emit sound toward the front. The axis of the diaphragm of the small-diameter speaker unit 15B is directed toward the tone escape 31. Also,
The axis of the diaphragm of the large-diameter speaker unit (15A) is directed toward the case slightly above the Tone Escape 31. Note that the tone escape 31 is formed on the front surface of the main body case 11 above the rear side of the keyboard 13.

Therefore, in the keyboard instrument having the above configuration, the vibrations of the diaphragms of the subica units 15A and 15B are transmitted to the player as performance sounds via the tone escape 31. As a result, the performer can directly and clearly determine whether the quality of the performance sound is good, bad, deteriorated, etc.

Further, the upper surface of the main body case 11 can be formed flat, and there is no need to form slits such as the tone escape 31 on the upper surface. Therefore, an automatic performance device or the like can be placed thereon. Further, the arrangement of the music board is also the same as in the past.

Note that the angles at which the speaker units 15A and 15B are erected can be set as appropriate.

〔effect〕

As described above, according to the present invention, the player can directly and clearly grasp the performance sound. With,
Peripheral devices and the like can be placed on the top surface of the musical instrument case.

In addition, since the large-diameter medium and low-frequency speaker units are placed horizontally compared to the small-diameter high-frequency speaker units, the overall requirement for making the main body case thinner can be fully met. In this case, the deterioration in sound quality in the middle and low tones has less of an effect on the performer than in the high tones, so the performance sound is virtually unchanged.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a schematic configuration of a first embodiment of a keyboard instrument according to the present invention, and FIG. 2 is a perspective view showing a speaker unit of the first embodiment. 11...Body case, 13...Keyboard, 15...Speaker unit, 15A...
...Large diameter speaker unit, 15B...Small diameter speaker unit, 31...Tone escape. Patent Applicant: Yamaha Corporation Agent, Patent Attorney: Kiyoshi Kuwai - Figure 2

Claims (1)

[Claims] (1) A box-shaped main body case, a keyboard arranged on the front side of the main body case, a tone escape formed to open toward the front side in the main body case, and a keyboard arranged behind the keyboard in the main body case. A keyboard instrument is equipped with a speaker unit that stands upright on the side and has an axis of a diaphragm oriented toward the tone escape, and the speaker unit includes a large-diameter speaker unit and a small-diameter speaker unit. A keyboard instrument comprising a speaker unit, wherein the standing angle of the large-diameter speaker unit is smaller than that of the small-diameter speaker unit.