JPS5913669Y2 - Performance sound control device for electronic musical instruments - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a performance sound control device for an electronic musical instrument.

In conventional electronic musical instruments, a key is pressed to close a switch corresponding to the key, and a sound source signal corresponding to the pressed key is thereby derived from the sound source section, and this sound source signal is sent to the tone section or the synthesizer section. The tone color is appropriately formed by the section, and the volume is adjusted appropriately by the volume adjustment section, so that the sound is produced as a performance sound from the speaker.

However, with conventional electronic musical instruments like this,
The sound source signal circuit is simply turned on and off by keystrokes, and the volume and timbre of the performance sound are controlled by other operation keys or pedals, which are different from the keys. It is not possible to perform musical expressions by touching the keys, as in the above, and therefore it is not possible to obtain sufficient performance effects.

In addition, since the printed circuit board with wiring for controlling the volume and timbre of the performance sound and the adjustment parts for making the adjustment are built into the rear part of the exterior body, the volume and tone of the performance sound can be adjusted. Coupled with the fact that tones, etc. are controlled using other operation keys or pedals that are different from the keys, the configuration becomes complicated and the assembly is troublesome, and the exterior body is required to adjust the adjustment parts. or keys etc. must be removed,
This was also troublesome.

For this reason, the inventor provided a printed circuit board with wiring for controlling the playing sound on the underside of the key, and installed a pressure-sensitive element electrically connected to the wiring of this printed circuit board on the upper side of this printed circuit board. An electronic musical instrument has been developed which is provided so that pressure can be applied by the keys, allows musical performance to be expressed by touching the keys, and which has a simple configuration and can be easily assembled.

This idea was made in connection with the above development, and is an electronic musical instrument that allows you to easily adjust the volume, tone, etc. of the performance sound by simply removing or opening a part of the exterior body without removing the key. The object of the present invention is to provide a performance sound control device in which a mouth frame is removably or openably provided in the front part of a shelf board on which a key is swingably mounted, and a mouth frame is provided under the front end of the key. A performance sound control component is provided on one side.

An embodiment of this invention will be described below with reference to FIGS. 1 to 3.

In the figure, 1 is a key provided corresponding to each pitch, and this key 1 swings on a balance rail 3 provided at the center of the upper surface of the shelf board 2 and a balance pin 4 installed therein. The shelf board 2 is supported from side to side by a guide pin 6 implanted in one of two front rails 5, 5 provided at the front of the upper surface of the shelf board 2, respectively.

When this key 1 is pressed against the weight of the return weight 7 provided at its rear end, a switch (not shown) provided at the rear of this key 1 switches and closes. A sound source signal corresponding to the pressed key 1 is derived from the sound source section.

On the upper surfaces of the front rails 5, 5, there is provided a printed circuit board 8 on which, for example, wiring for volume adjustment is provided.

The printed circuit board 8 includes a first printed circuit board 8a placed on the upper surface of the front rail 5.degree. 5, and a second printed circuit board 8a suspended from the front end of the first printed circuit board 8a.
A third printed circuit board 8C is provided at the rear end of the first printed circuit board 8a with an appropriate inclination toward the bottom. The printed circuit board 8a is attached to the one front rail 5 with screws 9, and the second printed circuit board 8b is attached to the mounting member 10 attached to the one front rail 5 with screws 11, Further, the third printed circuit board 8C is attached to the shelf board 2 with screws 13 via a mounting member 12 attached thereto.
installed by.

A variable resistor (performance sound control component) 14 is attached to the front surface of the second printed circuit board 8b below the front end of the key 1 and electrically connected to the wiring of the second printed circuit board 8b. ing.

A mouth frame 15 is provided on the front end surface of the shelf board 2 in front of the variable resistor 14 and the key 1.

This opening frame 15 is attached to the shelf board 2 by screws 1 through mounting members 16 attached to the back surface thereof by screws (not shown).
7 is removably attached.

A mounting plate 18 is mounted on the upper surface of the first printed circuit board 8a so as to be positioned on the front rails 5, 5.

Note that this mounting plate 18 is attached to the one front rail 5 by the screws 9.

Further, the guide pin 6 is connected to the first printed circuit board 8.
a and circular holes 19 and 20 provided at predetermined locations on the mounting plate 18, respectively.

A protrusion 21 is provided at a predetermined location on the upper surface of the mounting plate 18, and a pressure sensitive element 22 is placed on the upper surface of the protrusion 21 in a cantilevered manner. Element 2
An actuating plate 23 is mounted in a cantilevered manner on the upper surface of the pressure sensitive element 22 and the actuating plate 23, and the base ends of the pressure sensitive element 22 and the actuating plate 23 are attached to the mounting plate 18 with screws 24.

Note that the pressure sensitive element 22 is electrically connected to the wiring of the printed circuit board 8 via a lead wire (not shown).

A felt 25 is attached to the upper surface of the free end of the actuating plate 23, and the actuating plate 2 is attached to the upper surface of the mounting plate 18.
A felt 26 is attached at a position opposite to the free end of 3.

Note that a pressing portion 27 is protruded from the lower surface of the key 1 at a position facing the free end portion of the actuating plate 23.

Note that when installing the printed circuit board 8, pressure sensitive element 22, etc., first attach the mounting plate 18, pressure sensitive element 22, and actuating plate 23 to the first printed circuit board 8a with screws 24,
Further, the variable resistor 14 is attached to the second printed circuit board 8b, and these are made into a unit in advance, and the first printed circuit board 8a is placed on the front rails 5, 5,
Next, attach the first printed circuit board 8a and the mounting plate 18 with the screws 9.
to one front rail 5, and the second
, the third printed circuit boards 8b and 8C are attached to one of the front rails 5 and the shelf board 2 by screws 11.13, respectively.

Although the parts can be made into units in advance in this way, they can be easily assembled.

On the other hand, if you want to remove these, you can do the opposite of the above.

In addition, especially when removing or attaching the pressure sensitive element 22 or the actuating plate 23, it is sufficient to simply remove or attach only the screw 24.

When the key 1 is pressed, as shown in FIG. The pressure sensitive element 22 deflects in accordance with the amount of displacement of the actuating plate 23, that is, the amount of displacement of the key 1.
The pressure-sensitive element 22 picks up the sound and converts it into an electric signal, and then changes the volume of the performance sound by changing the electric signal generated according to the amount of deflection of the actuating plate 23 from the pressure-sensitive element 22, that is, the amount of displacement of the key 1.

In this way, the volume of the performance sound is changed by keystroke operation, but if you want to adjust the volume of the performance sound obtained by the same keystroke operation, first remove the screw 17 and remove the mouth frame 15 from the shelf board 2. In this state, the variable resistor 14 is adjusted appropriately to adjust the volume of the performance sound obtained by operating the same key, and then the mouth frame 15 is reattached to the shelf board 2 with the screws 17.

Note that in the above embodiment, the first printed circuit board 8a
Although the variable resistor 14 is attached to the front surface of the second printed circuit board 8b which is provided to hang down from the front end of the 8b may be appropriately extended toward the front side, and the variable resistor 14 may be attached to the upper surface of this extended portion.

Further, as shown in FIG. 5, a configuration may be adopted in which a variable resistor 14 is attached to the back surface of the mouth frame 15 together with a printed circuit board 28.

Further, in the above embodiment, the opening frame 15 is removably attached to the shelf board 2 with the screws 17, but the opening frame 15 may be attached to the shelf board 2 via a hinge so that it can be opened and closed. It is not limited to the examples.

Furthermore, in the above embodiment, a case has been described in which the volume of the performance sound is changed by the keystroke operation, and the volume of the performance sound obtained by the same keystroke operation is adjusted by the variable resistor 14, but the present invention is not limited to this. Instead, for example, the printed circuit board 8 may be provided with timbre forming wiring to change the timbre of the performance sound by keystroke operations, and in this case, the timbre of the performance sound obtained by the same keystroke operation may be adjusted by the variable resistor 14. It may also be a configuration.

As explained in detail above, according to the performance sound control device for an electronic musical instrument according to this invention, a mouth frame is provided in a removable or openable/closable manner on the front part of a shelf board on which a key is swingably placed, and Since the performance sound control component is provided below the front end of the key, the performance sound component can be adjusted simply by removing or opening the 0 bar, which is a part of the exterior body, without removing the key. Therefore, it is possible to easily adjust the volume, timbre, etc. of the performance sound.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the musical performance sound control device for an electronic musical instrument according to this invention, Fig. 2 is a vertical sectional side view of the main part when the key is pressed, and Fig. 3 is a part of the device. The exploded perspective view and FIGS. 4 and 5 are longitudinal sectional side views of essential parts showing other embodiments of this invention, respectively. 1...Key, 2...Shelf board, 8...
・Printed circuit board, 14... Variable resistor (parts for controlling performance sound), 15... Thin rod, 18...
Mounting plate, 22... Pressure sensitive element, 23...
Actuation plate.

Claims (1)

[Scope of utility model registration request] An electronic device characterized in that a mouth frame is provided on the front part of a shelf board on which a key is swingably mounted, and a mouth frame is provided in a removable or openable/closable manner, and a performance sound control component is provided below the front end of the key. Performance sound control device for musical instruments.