JPS599252Y2 - keyboard instrument - Google Patents

Description

[Detailed description of the invention] I am the rightful owner of patent registration number 629506 for this invention, but it is an invention based on this invention and improved to eliminate the drawbacks of the invention.

The appearance from the front is a commercially available Taishogoto. Similarly, the structure of this invention is that a small electric motor and electromagnet are installed on the back side from a household power line, and the drums are brought into contact with the strings to produce sound when the electric motor rotates.However, the drawback of this invention is that the electric motor There are many unbalanced parts such as the tuning band and pulley that connect the swinging frame, and the assembly is complicated.The sliding noise during operation and the collision noise between the electromagnet's iron core and the swinging frame can be fatal to the instrument.

In order to eliminate this drawback, the present invention connects the shaft 1 of the electric motor with the flexible shaft 2, attaches a snapping claw 4 to the outside of the disc 3 at the tip, and uses an electromagnet 9 with the shaft bearing 6 facing the iron core 7 covered with cloth 8. Install each keyboard 1
The musical instrument is equipped with a switch 14 that opens and closes when a string 13 is pressed, and when playing, electricity is turned on and the electric motor 1 is operated.

However, since the flexible shaft 2 is supported by the bearing 6, the trigger claw 4 does not touch the string 13, so it does not produce a sound, but the key 10 on the keyboard plays the string 1.
When 3 is pressed, electricity is applied, the electromagnet 9 is activated, and the iron core 7 pulls the iron piece 5 of the flexible shaft 2 opposite to it, causing the trigger claw 4 to touch the string 13 and produce sound.

Since the iron core 7 is covered with cloth 8, there is no collision noise.

Because of the structure described above, it is easy to assemble, and anyone can quickly master and enjoy playing.

[Brief explanation of the drawings] Figure 1: Overall perspective view. FIG. 2 is a plan view with the top cover open. Figure 3 is an enlarged perspective view of the electric motor and electromagnet. FIG. 4 is an enlarged sectional view of the state in which the AB key is energized by pressing. FIG. 5 is a perspective view showing a state in which the electromagnet is activated and produces sound when the key is pressed.

Claims (1)

[Scope of utility model registration request] an electric motor 1; a flexible shaft 2 connected to the shaft of the electric motor 1;
A disk 3 provided at the tip of the flexible shaft 2, a snapping claw 4 attached to the outside of the disk 3, a bearing 6 supporting the flexible shaft 2 and having an iron piece 5, and the iron piece 5. An electromagnet 9 which is provided in facing positions and whose iron core 7 is covered with cloth 8, a string 13, a keyboard 10 that presses the string 13, and a string 13 of the keyboard 10.
and a switch 14 that is closed in conjunction with the pressing of the electromagnet 9. When the switch 14 is closed, the electromagnet 9
is energized and the iron core 7 pulls the iron piece 5, whereby the snap claw 4 is moved to a position where it touches the string 13 and produces sound.