JP2021039325A - Sound tool in which rod is supported and fixed vertically on resonance plate - Google Patents

Abstract

To solve problems of a xylophone: whose rods are not supported firmly, because their ends are supported freely; and whose shape, including a kalimba, is not like a keyboard which has aligned rods, because different length rods (diaphragms) are hit for changing sound.SOLUTION: In the present invention, when a rod is vertically passed through a resonant plate 1 to be supported and fixed, and when a constant length portion 2 at one end of the rod is hit, a sound having a different pitch can be produced due to difference in length of the other end of the rod. Since the rod is firmly fixed to the resonance plate, it is not necessary to limit the rod on the hitting side horizontal like a xylophone, and since the rods are hit at portions with the same length, there is an advantage to be formed like a keyboard.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sound instrument in which a rod is vertically supported and fixed to a resonance plate.

In the conventional xylophone, the stick is freely supported at both ends, and the stick is struck to vibrate and make a sound. In Kalimba (Sanza) musical instruments, pin-shaped diaphragms of different lengths are played, and the vibrations are transmitted to the resonance plate via pieces to produce sound.

The xylophone cannot firmly fix the stick. Also, since the rods (diaphragms) of different lengths, including the kalimba, are struck, the rods do not have the same shape as a keyboard.

In the present invention, a rod is vertically passed through a resonance plate to be supported and fixed, one end of the rod has a constant length, and the other end has a different length so that the pitch of the sound produced when a constant length portion is struck changes. The purpose is to obtain the sound equipment that has been made.

In FIG. 1, a rod is vertically passed through a resonance plate 1 to be supported and fixed, one end of the rod is set to a constant length 2, the length of the other end 3 of the rod is changed, and the sound produced when a constant length portion is struck is produced. It is a perspective view of a sound instrument whose height is changed. When a fixed length part of the rod is hit, the vibration is transmitted to the resonance plate and the rod at the other end, and each resonates at a different frequency. Of these, the rod at the other end vibrates at the natural frequency of the rod that is fixed at one end and free at the other end according to its length, and becomes the main part of the sound. Since the resonance plate resonates including the frequency and produces sound, the sound becomes muddy by that amount.
The pitch is tuned by striking a fixed length part and adjusting the length of the rod at the other end. Since the natural frequency of the lateral vibration of a rod is inversely proportional to the square of the length of the rod, if the length of the rod that becomes the pitch of one sound is known, the length of the rod that becomes the pitch of another sound can be calculated. You can ask. For example, determine the length of the bar that produces the low-pitched note while gradually shortening it, and cut the bars of other pitches longer than the length obtained based on that, and tune it while gradually shortening it in the same way.

In the present invention, by striking the end of a rod having a certain length while the rod is firmly fixed to the resonance plate, it is possible to produce sounds having different heights depending on the length of the rod at the other end. Therefore, unlike the xylophone, it is not necessary to limit the sticks horizontally, and since the sticks on the hitting side have a fixed length, they can be aligned in a keyboard shape.

It is a perspective view of the sound instrument which concerns on this invention. It is a perspective view which shows Example 1 of this invention. It is a top view which shows Example 2 of this invention.

FIG. 2 shows a perspective view in which the present invention is applied to a “katakata doll” toy. The doll is a toy that hangs its arms on two rows of pins provided diagonally alternately and slides down in a zigzag manner. The arms come off and hit the lower pin, making a rattling noise.
By using the slope plate as a resonance plate, the pin on the front side of the slope plate as a fixed length part of the rod, and changing the length of the rod protruding on the back side of the slope plate to change the pitch of the sound, and arranging it according to the melody. , The rattling sound can be made into a melody. The length of the stick on the front side needs to be as long as the thickness of the doll, which is considerably shorter than the length of the stick on the back side.

FIG. 3 is a keyboard-shaped musical instrument in which a fixed length portion of a rod vertically passed through a resonance plate is placed on the front side, and the length of the rod on the back side is adjusted and fixed so as to have a Doremi scale. The keyboard-shaped part can be oriented freely, not just horizontally.

1 Resonance plate 2 Constant length part of the rod 3 Change the length of the rod

Claims (1)

By passing the rod vertically through the resonance plate to support and fix it, one end of the rod has a constant length, and the length of the other end is changed, the pitch of the sound produced when hitting the constant length part is changed. Sound equipment.

Images