JPH07129151A - Bridge device - Google Patents

Abstract

PURPOSE:To adjust a chord height continuously variably, and transmit an oscillation wave of a chord excellently to the body. CONSTITUTION:A proper number of pieces 20 are juxtaposed with each other on a board 10 fixed to the body, and the respective pieces 20 have a base stand 21 forming a housing hole 211 vertical to the board 10 and a chord receiving stand 22 slidably fitted in the housing hole 21, and a pressing screw 215 is arranged on the base stand 21 so as to press the chord receiving stand 22 to a housing hole inner wall, and in the chord receiving stand 22, a chord receiving groove 221 is arranged on the top surface, and an adjusting screw hole 223 passing penetratingly to a bottom surface from the top surface is penetratingly arranged, and a height adjusting screw 224 is screw fitted so that the lower end comes into contact with the board 10, and when a lower end projecting length of the height adjusting screw 224 is changed, a height of the chord receiving groove 221 is adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge device used in a stringed instrument such as a guitar.

[0002]

2. Description of the Related Art In a bridge device which has been generally used in the past, the same number of pieces as the number of strings are juxtaposed on a board fixed to the body of a stringed instrument, and these pieces are individually moved in the front and rear positions. It is constructed to have an adjusting means and an up-and-down position adjusting means for moving each piece in the contacting / separating direction with respect to the body. The front-back position adjusting means is, for example, Japanese Utility Model Publication No. 55-152585 or Japanese Patent Publication No. 63-43232.
As disclosed in Japanese Patent Publication, a long screw is inserted through a tail piece portion formed upright at the rear end of a board, and each piece is screwed to its protruding end, and the long screw is rotated to move the piece. Generally, it is constructed so that it is constructed in such a manner that the above-mentioned vertical position adjusting means is the above-mentioned Japanese Utility Model Laid-Open No. 55-152585.
As disclosed in Japanese Unexamined Patent Application Publication No. 2004-115, a screw which is brought into contact with the substrate at a right angle is screwed on both sides of the piece, and the piece is moved in the vertical direction by rotating the screw, As disclosed in Japanese Patent Laid-Open No. 63-44232, a model in which a piece is divided into a base and a string cradle and the height of the string cradle with respect to the substrate is adjusted by moving the inclined surface of the base to move the string cradle. There are things such as

In such a conventional vertical position adjusting means using upper and lower screws, it is necessary to rotate the pair of screws to move the pieces up and down and keep the pieces horizontal, which is troublesome to adjust. In addition, since the bridge and the board are only connected to each other through a pair of thin screws, there is a problem that the efficiency of transmitting the vibration of the strings to the board is poor.

Further, in the case where the above-mentioned piece is divided into two and the string cradle is moved on the inclined surface, fine adjustment after fixing the string cradle at a desired position is troublesome, and the string cradle has an inclined surface. Therefore, there is a problem that the position of the string cradle moves if the screw for fixing the string cradle loosens due to the vibration of the string.

In order to solve such a problem, as disclosed in Japanese Utility Model Laid-Open No. 2-113790, a support screw having a large diameter piece and a string receiving roller provided on the top of the support screw are provided. A bridge device has been proposed which is composed of a saddle that engages the support screw in an upright state. In this bridge device, the string receiving roller can be vertically moved by rotating the support screw.

[0006]

In the bridge device of the type in which the supporting screw is screwed upright on the saddle as described above, the string receiving roller can be moved up and down in a horizontal state only by rotating the supporting screw. Although the sound transmission effect is good, when adjusting the support screw, it is necessary to align the groove of the string receiving roller with the extension direction of the string accurately, so the adjustment position of the support screw must be adjusted twice during one rotation of the support screw. Therefore, there is a problem that it is difficult to finely adjust the height of the strings, and there is also a problem that the appearance of the supporting screw is bad because the threads of the supporting screw are exposed. Furthermore, the shape of the supporting screw is cylindrical. However, there is also a problem that there are design restrictions.

[0007]

According to the present invention, a required number of pieces 20 juxtaposed on the substrate 10 are fitted to the base 21 and a front and rear position adjusting means, for example, a base 21 to which a long screw 30 is attached. It is composed of a string receiving table 22 that is formed. The base 21
Is a hole 21 for accommodating the string cradle 22 which is vertically provided through the board so as to slidably house the string cradle 22 in the center thereof.
1, a screw 212 for front-rear transition provided in parallel with the substrate so as to screw the long screw 30 and the accommodation hole 21.
1 from the side wall of the accommodating hole to insert the string support 22 into the accommodating hole 21.
The pressing screw 215 that presses against the hole wall of No. 1 and the fixing means for fixing the bottom surface of the base 21 to the substrate 10 at any time, for example, the base 12 so as to be locked to the long hole 12 provided through the substrate 10. It has a fixing screw 216 attached to the bottom surface of the table. Further, the string receiving base 22 is formed in a shape matching the accommodation hole 211 of the base 21, and the string receiving groove 221 formed on the top surface and the pressing screw 215 of the base 21.
An engaging groove 222 which is formed in a vertically elongated shape on the side surface of the string cradle so as to be engaged with, and an adjusting screw hole 223 which is provided through from the top surface of the string cradle 22 to the bottom surface of the string cradle 22. Screw hole 22
The height adjusting screw 22 that is screwed into the inside of the 3
4 and. Since the engaging groove 222 is used for positioning the string receiving groove 221, it is necessary when the string receiving base 22 has a cylindrical shape, but not necessary when the string receiving base 22 has a non-rotatable shape. is there.

[0008]

[Operation] In the bridge device of the present invention, the base 21
Is placed in a predetermined position in advance and the string support 2
2 is pressed against the wall of the hole by a pressing screw 215 with a predetermined pressing force. In order to adjust the height of the string cradle 22 in this state, a wrench rod may be inserted through the adjusting screw hole 223 and the adjusting screw 224 may be rotated. By doing so, the length of the lower end portion of the adjusting screw 224 that protrudes from the bottom surface of the string cradle 22 changes, so that the string cradle 22 rises when the protruding length becomes large, and the string cradle 22 becomes small when the protruding length becomes small. Will be lowered by the tension of the strings and will descend.

[0009]

1 is a perspective view of an apparatus according to the present invention, in which a tail piece portion 11 is formed on a rear surface of a substrate 10 by an upright wall surface, and a plate surface is required to have an elongated hole 12 elongated in a string extending direction. It is provided for each piece 20. The tail piece section 11
A through hole 111 is provided for each of the pieces 20, and an appropriate number of mounting holes 112 for fixing the substrate 10 to the body of the guitar are provided on the plate surface of the substrate 10. A long screw 30 for moving the piece 20 back and forth is attached to the through hole 111 of the tail piece portion 11, and a winding spring 31 for pressing the piece 20 is wound around the long screw 30.

The piece 20 has a base 21 and a string support 22. The base 21 has an accommodation hole 211 for slidably receiving the string support 22 with respect to the substrate 10. And a screw hole 212 for front-rear transition, which is formed at a right angle and is formed in parallel with the substrate 10 so that the long screw 30 can be screwed.
The peripheral wall 2 of the accommodation hole 211 so as to communicate with the accommodation hole 211.
13 a screw hole 214 that is transparently provided on the side surface and this screw hole 21
4 and a fixing screw 216 for fixing the base 21 at a desired position of the slot 12.
And are provided.

The string receiving base 22 has a string receiving groove 221 recessed in the top surface thereof, a vertically long engaging groove 222 with which the pressing screw 215 of the base 21 is engaged, and penetrates from the top surface to the bottom surface. An adjusting screw hole 223 having a thread formed at least in the lower part,
The adjustment screw hole 223 is screwed and housed, and the height adjustment screw 224 whose lower end is in contact with the base plate 10 is provided. The pressing screw 215 is pressed into the engaging groove 222 to press the string holder. 22 is configured to be pressed against the hole wall of the accommodation hole 211 with a predetermined pressure and to adjust the height of the string receiving groove 221 with respect to the substrate 10 by changing the protruding length of the lower end of the height adjusting screw 224. I am doing it. For this purpose, the height adjusting screw 224 has a hole 224a for fitting a passive portion, for example, a hexagonal wrench, on the top surface thereof.

Since the device of the present invention is such, in order to determine the position of the base 21 in the string extending direction, the long screw 30 is rotated to lock the base 21 to the fixing screw 216. It suffices to move it back and forth along the long hole 12 while resisting against the above. In this way, when the rotation of the long screw 30 is stopped, the piece 20 is fixed at the optimum position on the substrate 10 by the engaging force of the fixed screw 216. Then, in order to adjust the height of the string, a tool such as a wrench rod is inserted through the screw hole 223 of the string pedestal 22 and the height adjusting screw 224 is rotated, whereby the height adjusting screw 2
It suffices to change the protruding length of the lower end of 24 from the bottom surface of the string pedestal 22. By doing so, the string pedestal 22 can be pressed by the pressing screw 21.
Since it moves vertically in the accommodation hole 211 of the base 21 against the pressure contact force of the height adjusting screw 224, the height adjusting screw 224 is at a desired position.
When the rotation of the string is stopped, the string support 22 is pressed against the substrate 10 by receiving the tension of the string.
The vertical position can be adjusted in the accommodation hole 211 of 21.

In the above process, the engaging groove 222 is
The string cradle 22 has a columnar cross section as in the embodiment, and the accommodation hole 2
It is necessary when it is rotatable within 11, and is not necessary when the string support 22 has a non-rotatable shape inside the accommodation hole 211 such as an elliptical cross section or a polygonal cross section. That is, the engaging groove 222
Is for matching the string receiving groove 221 of the string receiving base 22 with the extending direction of the string, and therefore, it is not necessary to provide the string receiving groove 22 on the string receiving base 22 which does not require such positioning.

[0014]

Since the device of the present invention is as described above,
The following effects can be achieved. Since the string receiving base 22 can be moved up and down with the direction of the string receiving groove 221 aligned with the string, the height of the string can be finely adjusted by stopping the rotation of the height adjusting screw 224 at a free position. . Since there is no thread on the outer surface of the string pedestal 22, the string pedestal 22 has a good appearance, and since it is not necessary to rotate the string pedestal 22 in the accommodation hole 211 of the base 21, the string pedestal 2
2 can be made into any shape such as elliptical or triangular in cross section,
Therefore, the design range is large. String support 22 to base 2
Since it can be fixed in the accommodation hole 211 of No. 1 closely with the hole wall,
The efficiency of transmitting the vibration waves of the strings to the body is good, and therefore the musical performance can be improved.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of a bridge device according to the present invention.

FIG. 2 is a front view of a piece of the device.

FIG. 3 is a vertical sectional side view of the same piece.

[Explanation of symbols]

 10 board 20 piece 21 base 211 accommodation hole 215 pressing screw 22 string receiving base 221 string receiving groove 222 engaging groove 223 adjusting screw hole 224 height adjusting screw

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[Procedure amendment]

[Submission date] January 11, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (1)

[Claims] 1. A board fixed to a body of a stringed instrument, and a required number of pieces juxtaposed on the board. The pieces are provided with front-rear position adjusting means so that the pieces can be moved in a string extending direction. A base and a string support fitted to the base, and the base is provided with a receiving hole that is vertically provided to the substrate so as to slidably accommodate the string support. And a pressing screw that presses the string pedestal in the accommodation hole against the inner wall of the hole with a predetermined pressure, and a fixing screw that fixes the base to the substrate, and the string pedestal is provided on the top surface thereof. A string receiving groove provided, an adjusting screw hole that is transparently provided from the top surface to the bottom surface of the string receiving base, and is screwed into the adjusting screw hole, and the lower end is in contact with the substrate, and the top surface is A height adjusting screw having a passive portion for external operation, and changing the protruding length of the lower end by rotating the height adjusting screw. A bridge device configured to adjust the position of the string cradle in the base.