JPH0116149Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric piano that can produce musical tones of three types of tones.

Conventionally, electric pianos have a mechanism in which the strings are vibrated by a keystroke, the vibrations are converted into an electric signal by a pick-up using a piezoelectric element, and the electric signal is used to make a sound generator such as a speaker sound to produce musical sounds. There are known systems that generate musical tones by making a vibrating body such as a tones vibrate when a key is pressed, and converting the vibrations into electrical signals using a pick-up such as an electromagnetic coil, but the former produces a sound similar to that of a piano. The latter produces a sound that has a sinusoidal waveform containing only a small amount of harmonics and decays exponentially, and each generates a musical tone with a unique timbre.

Conventionally, in a keyboard instrument, a plurality of sounding bodies are provided for one striking body, and means is provided for selectively switching a state in which at least one of these sounding bodies is struck by the striking body. This switching means is constructed by associating a mechanism with approximately the same structure as the soft pedal assembly of a grand piano with a hammer and its operating part. According to this, in an electric piano in which the instrument case is supported by the legs, a pedal and a cable for transmitting the movement of the pedal must be attached to the bottom of the instrument case, which makes the structure complex and makes transportation difficult. The problem was that it was extremely troublesome.

The purpose of the present invention is to eliminate these conventional inconveniences, and the action mechanism is positioned at the position where one hammer strikes two strings, and at the position where one hammer strikes two strings.
An electric piano in which the strings are movable to the position where they are struck, and the vibrations of the strings are converted into electrical signals by a pick-up, in which the keyboard and action mechanism are mounted on a reed that is slidably placed on a shelf. , a lever having one end abutting the reed and a locking piece pivotally attached to the other end is rotatably supported on the instrument case, and a hole is bored in the upper front plate of the instrument case to communicate the plurality of grooves; The invention is characterized in that the lever is rotated to fit the locking piece into one of the plurality of grooves in the hole, thereby moving the reed stepwise.

FIG. 1 shows a flat electric piano according to an embodiment of the present invention, the keyboard 1 of which is placed on a reed 6 slidably placed on a shelf 5, as shown in FIGS. 2 and 3. A frame 7 (not shown) is attached to the top of the action mechanism 2 together with an action mechanism 2 (not shown), on which a string 4 facing the hammerhead 3 is stretched. A bracket 8 is fixed to the left end of the reed 6, and a notch 9 opening at the rear of the bracket 8 has a holding lever 12 pivotally attached to a stator 11 fixed to a side plate 10. The lower ends of the two are engaged. As shown in FIG.
Three grooves 16 are exposed to the outside through a hole 15 drilled in the groove 4 and communicated with the hole 15 by an operation from the outside.
-1, 16-2, 16-3 so that it can be locked.

When the holding lever 12 is rotated to the right and the locking piece 13 is engaged with the groove 16-3, the reed 6 slides to the left on the shelf board 5, and the action mechanism 2
As shown in FIG. 6A, the plurality of hammerheads 3 of
Two strings 4, 4 of C#, C#, two strings 4, 4 of pitch D, D... Groove 16-
2, the reed 6 slides to the right on the shelf board 5, and as shown in FIG. E,F
When the holding lever 12 is further rotated to the left and the locking piece 13 is engaged with the groove 16-1, the reed 6 moves over the shelf board 5. Further sliding to the right, as shown in FIG.
Two strings 4, 4 with pitches C# and D, two strings 4, 4 with pitches D, D#, etc.

A pickup (not shown) made of, for example, a cable-like elastic piezoelectric element is disposed between the frame 7 and the strings 4.

Furthermore, if there is a break part between the strings 4 of the 1st to 88th keys strung on the frame 7, the string 4 of one key to the left of the break part will move the hammer head 3 to the position shown in Fig. 6B. When shifting from the position shown in Figure 6C to the position shown in Figure 6C, only one string 4 faces the hammerhead 3, so in this case an extra string 4 that is a semitone higher than the pitch of the key is stretched. . Thus, when the keyboard 1 is operated with the locking piece 13 engaged in the groove 16-3 as shown in Figure 5, the hammer head 3 corresponding to the operated key will strike two strings 4 of the same pitch. As the strings are struck, a sound similar to that of a piano is generated. Next, when the locking piece 13 is engaged with the groove 16-2 and the keyboard 1 is operated, one string 4 of the pitch corresponding to the operated key is struck, which is close to a sine wave with few harmonics. A sound is generated. Furthermore, move the locking piece 13 to the groove 1.
6-1, when the keyboard 1 is operated, two strings 4 corresponding to the operated keys are struck with different pitches, so that the musical sound of a honky-tonk piano is generated.

In the above embodiment, no biasing force is applied to the reed 6, but a leaf spring 17 is provided on the right side plate 10A as in a normal grand piano.
7 (see FIG. 7); in this case, the notch 9 as shown in FIGS. 3 and 4 is unnecessary, and the holding lever 12
The lower end of the reed only needs to come into contact with the left side of the reed 6.

In this way, according to the present invention, the action mechanism is configured to be movable to the position where one hammer strikes the second string and the position where the first string is struck, and the vibration of the string is converted into an electric signal by a pick-up. In this electric piano, a keyboard and an action mechanism are mounted on a reed that is slidably placed on a shelf, and a lever with one end abutting the reed and a locking piece pivoted on the other end is rotatable. is pivoted to the instrument case, a hole is bored in the upper front plate of the instrument case that communicates a plurality of grooves, and the locking piece is fitted into one of the plurality of grooves of the hole by rotating the lever. Since the reed is moved in stages, the structure is simpler than the conventional one.
It has advantages such as being convenient for transportation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a flat electric piano according to an embodiment of the present invention, Fig. 2 is a schematic front view of the flat electric piano with the upper front plate and mouth bar removed, and Fig. 3 is a keyboard portion of the piano. Partial perspective view, Figure 4 is an enlarged perspective view, Figure 5 is a front view of the upper front plate, Figures 6A and 6B.
6C is an explanatory view showing the relationship between the strings and the hammerhead, and FIG. 7 is a perspective view showing a part of the keyboard. 1...Keyboard, 2...Action mechanism, 3...Hammerhead, 4...Strings, 5...Shelf board, 6...
Reed, 7... Frame, 8... Wood receiver, 9... Notch,
10, 10A...Side plate, 11...Stator, 12...
... Holding lever, 13 ... Locking piece, 14 ... Upper front plate, 15 ... Hole, 16-1, 16-2, 16-3
... Groove, 17... Leaf spring.

Claims (1)

[Scope of utility model registration request] In an electric piano, the action mechanism is configured to be movable between a position where one hammer strikes the second string and a position where the first string is struck, and the vibrations of the strings are converted into electric signals by pickup. An action mechanism is provided on a reed that is slidably placed on a shelf board, and a lever, which has one end in contact with the reed and a locking piece attached to the other end, is rotatably supported on the musical instrument case. A hole that communicates a plurality of grooves is bored in the upper front plate of the case, and the locking piece is fitted into one of the plurality of grooves in the hole by rotating the lever, and the reed is moved in stages. An electric piano characterized by being movable.