JP6984826B2 - Capo tasto - Google Patents

Description

The present invention relates to a capo tasto of a stringed instrument without frets such as a shamisen or a shamisen.

A stringed instrument without frets, such as a sanshin or a shamisen, has a capo with multiple strings stretched on it, and is played by pressing the strings on the surface of the capo with a finger. In some cases, capo tasto is used to adjust the key of the song. Here, the capo tasto is an instrument attached to the rod of a stringed instrument, and is an instrument that presses all strings at the same position in the longitudinal direction of the rod.

In the conventional capo tasto, an elastic body such as rubber is incorporated in the string holding part to ensure that all the strings are pressed against the surface of the neck. The position accuracy of the capo is important, and it is necessary to fine-tune the position while tuning. There was a drawback that it was troublesome because it had to be redone.

In the conventional capo tasto, an elastic body such as rubber is incorporated in the string holding part in order to surely press all the strings against the surface of the string, but the shamisen and shamisen without frets are directly on the string where the elastic body vibrates. Since they come into contact with each other, when the strings are played in the open string state, there is a drawback that the vibration is greatly attenuated and the sound is short.

In the conventional capo tasto, the lengthwise dimension (pressing width) of the strings of the string contact member is as large as 5 mm to 10 mm, and for shamisen and shamisen without frets, the dimensional variation of each member of the capo tasto, the shape of the neck, etc. When the hit is uneven due to the cause, there is a drawback that the true string pressing point varies within the range of the pressing width, and the tuning becomes inaccurate.

Jitsuzensho 55-167280 JP-A-2018-155839 JP 2012-141358

For stringed instruments without frets such as the shamisen and shamisen, it is necessary to fine-tune the holding position of the rod in the longitudinal direction while tuning the strings, but there is a great deal of operational force to slide the capo tasto in the longitudinal direction of the rod with the capo tasto attached to the rod. Since it is necessary and not easy, it has the disadvantage that it is troublesome because the capo tasto must be reattached and detached. In view of this problem, an object of the present invention is to provide a capo tasto that can be easily slid in the longitudinal direction of the rod while the capo tasto is attached to the rod.

Since the string contact member of the conventional capo tasto is an elastic body such as rubber, there is a drawback that when the string is played in the open string state, the vibration is greatly attenuated and the sound is short. In view of this problem, an object of the present invention is to provide a capo tasto having a small vibration attenuation and a long sound resonance when the string is played in the state of an open string.

In the conventional capo tasto, the lengthwise dimension (pressing width) of the strings of the string contact member is as large as 5 mm to 10 mm, and for stringed instruments without frets such as shamisen and shamisen, the dimensional variation of each member of the capo tasto, the shape of the neck, etc. If the hit is uneven due to the cause of the above, there is a drawback that the true string pressing point varies within the range of the pressing width, and the string tuning becomes inaccurate. An object of the present invention is to provide a capo tasto capable of accurate tuning in view of this problem.

In the present invention, the string holding bar is made of an elastic material and a plastic having a coefficient of static friction of 0.4 or less. It is a capo tasto with a frictional string contact member stacked on top of each other, and the elastic material is all conventional. The string contact member has low friction while retaining the function of securely pressing the strings against the surface of the rod. It can be easily slid in the longitudinal direction of the rod with a small force with one hand while attached to the rod.

The string contact member is made of plastic or the like, and the sound can be reverberated longer than that of a conventional elastic body such as rubber.

The present invention is true even if the length of the string contact member (holding width) is less than 4 mm and the hit is uneven due to dimensional variation of each member of the capo tasto, the shape of the rod, or the like. The variation width of the string holding point is small, and the accuracy of tuning is improved.

The capo tasto of the present invention can be easily slid in the longitudinal direction of the rod with a small force with one hand while the capo tasto is attached to the rod, and the tuning accuracy is improved, so that the tuning can be performed in a short time.

In the capo tasto of the present invention, since the string contact member is made of plastic or the like and is not a material having a large vibration damping property such as rubber, when the string is played in the state of an open string, the vibration damping is small and the sound is long and good. ..

It is (a) rear view, (b) side view, (c) front view which shows an example of the capo tasto which concerns on this invention. It is (a) side view and (b) front view which shows the state which the capo tasto is attached to the three-line rod.

An example of an embodiment of the capo tasto according to the present invention will be described in detail below with reference to the drawings. In the following, the capo tasto used for a sanshin having three strings as a stringed instrument will be illustrated, but the capo tasto according to the present invention can also be used for other stringed instruments having no frets such as a shamisen.

As shown in FIG. 1, in the capo tasto 10, a support bar 20 and a string holding bar 30 are combined so as to be openable and closable by an opening / closing shaft 40, and the capo tasto 10 is loaded in a direction of being constantly closed by a spring 50.

In the string holding bar 30, the string holding bar main body 32, the string contact member 33, and the elastic material 34 are adhered between them.

FIG. 2 shows a state in which the capo tasto 10 is attached to the rod 1. When you pinch the knobs 21 and 31 with your fingers, the capo tasto opens, so attach it to the rod 1 in that state. The string 2 is pressed against the surface of the rod 1 by the string pressing bar main body 32 via the string contact member 33 and the elastic body 34. Variations due to differences in the thickness of a plurality of strings, manufacturing errors of each member, etc. are absorbed by the elastic material 34, the string contact member 33 bends moderately, and each string is applied to the surface of the rod with a constant force. Can be suppressed.

The material of the string contact member 33 is polypropylene polyacetal having a coefficient of static friction of 0.4 or less. -Plastic such as nylon or bamboo is preferable, and the thickness is preferably 1 mm or less so that it can easily bend. It's good.

The force required to slide the capo tasto 10 in the longitudinal direction of the rod with the capo tasto 10 attached to the rod 1 is as large as 9 to 12N when the string holding force by the spring 50 is 12N and the conventional string holding part is made of rubber. Although necessary, the one of the present invention is as small as 2 to 3N and can be quickly slid with one hand.

The string contact member 33 has a dimension (pressing width) in the longitudinal direction of the string of less than 4 mm , and even if the string contact member 33 is unevenly hit due to dimensional variation of each member of the capo tasto, the shape of the rod, etc., the true string holding point. The variation width of is small, and the accuracy of tuning is improved.

1 rod 2 string 10 capo tasto 20 support bar 21 knob part 30 string holding bar 31 knob part 32 string holding bar body 33 string contact member 34 elastic body material 40 opening and closing shaft 50 spring

Claims (1)

On the rod of a stringed instrument without frets, a support bar arranged on the back side of the rod, a string holding bar arranged on the surface of the rod, an opening / closing shaft provided on a part of these bars, and these bars. A clip-type capo tasto that is equipped with a spring provided to load the rod in the closing direction and presses the strings against the surface of the rod.
The string holding bar is provided with an elastic material and a plastic or bamboo string contact member having a coefficient of static friction of 0.4 or less in an overlapping manner, and the contact length of the string contact member in the longitudinal direction of the string is capotasto which is a 4mm less than.

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