JP2005156637A - Brace bar attached to inner surface of front board of guitar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brace bar attached to the inner surface of the front board of a guitar, which provides a performer with convenience, by improving the sound of the front board by further improving the flexibility while maintaining the strength of the brace bar so that reverberation last for a longer period of time, and by reducing the weight of the brace bar so that the total weight of the guitar is reduced. <P>SOLUTION: The brace bar 6, attached to the inner surface of the front board 1a of the guitar and supporting the front board 1a, includes a part in which the side surface contour line on a section is vertical from the lower end to a prescribed height, warps from the position of the prescribed height to the central side, and is installed like a taper toward the upper end. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a brace bar that is attached to the inner surface of a guitar board (sound board) and prevents the deformation of the board, and more particularly, the shape of the brace bar that supports the board. Attached to the inner surface of the guitar's front panel, which is lighter and more convenient for use by improving the flexibility and further improving the sound performance of the front panel by changing and maintaining the firmness of the front panel Regarding the brace bar.

  In general, as shown in FIGS. 1 and 2, the guitar is bonded to the inside of the guitar body 1 and the guitar body 1 to which the top plate 1a is bonded, and is used for connecting a neck described later. A wood block 2 provided with a groove, a neck 3 in which an insertion portion 3a of a heel 3b is inserted and connected to the groove 2a of the block 2, and a finger plate 4 bonded to the upper surface of the neck A bridge 5 installed on the upper surface of the front plate 1a of the guitar body 1, a brace bar 6 bonded to the lower surface of the front plate 1a, a head 7 provided at the tip of the neck 3, It includes a guitar wire 8 connected between the bridge 5 and the head 7, and a fingerboard adjusting iron core 9 that is installed in the longitudinal direction at the upper center of the neck 3 and adjusts the planar state of the fingerboard 4.

  In the guitar configured in this manner, the performance sound is sustained for a long time due to the sound of the front plate 1a during performance, and a specific guitar sound is generated.

  In order to prevent deformation of the front plate 1a performing such an important function even if it is used for a long period of time, as shown in FIGS. 3 and 4, various brace bars 16, 16 ', 16a, 16'a, 16b, 16'b should be glued. The harder the brace bar attached to the inner surface of the surface plate 1a, the longer the life of the guitar. On the other hand, the softer the sound, the better the sound of the surface plate 1a.

  If the brace bar is not stiff, the front plate 1a swells to the outside as the usage period elapses, so the sound quality changes and the life of the guitar is shortened. However, if the brace bar is harder than necessary and not flexible, the surface plate 1a will not be deformed, but there is a problem that the reverberation is lowered and the reverberation does not last long, and the sound is dull and short.

  Therefore, it is preferable that the brace bar has both rigidity and flexibility. Also, the shape, number and attachment structure of the brace bars are very important in the performance and durability of the guitar.

  3 and 4 show the state of the brace bar attached to the inner surface of the front plate 1a in the conventional guitar. As shown in the drawing, in the two conventional examples, the shape, number and attachment structure of the brace bars are similar to each other. That is, two main brace bars 16, 16 'are attached in an X shape, and auxiliary brace bars 16a, 16b, 16'a, 16'b are attached around the main brace bars 16, 16'. Although the shape, number and attachment structure of these brace bars are similar to each other, the main brace bar 16 and the auxiliary brace bar 16a in FIG. 4, the main brace bar 16 ′ and the auxiliary brace bar 16 ′ a are flat at the upper surface intermediate portion without being curved, but as shown in FIG. And includes a parabolic portion.

The brace bars 16 and 16a of FIG. 3 are made to be flexible by curving the upper middle portion a while maintaining the rigidity by making the height higher than the width, so that the brace bars 16 ′ and 16 ′ of FIG. As can be seen from FIG. 5, a portion b from the intermediate height to the upper end is formed in a parabolic shape on the cross section so that the cross-sectional area is reduced to have flexibility. In this way, the sound performance of the front plate 1a is improved by the flexibility of the brace bar, and the mid-low sound lasts longer.
JP-A-6-35448

  From this viewpoint, the present invention is intended to further improve flexibility while maintaining the rigidity of the brace bar.

  The present invention was created in consideration of the above-described conventional technology, and its purpose is to further improve flexibility while maintaining the rigidity of the brace bar, thereby improving the reverberation of the front plate. It is to provide a brace bar that is attached to the inner surface of the guitar's front plate, providing convenience to the performer by making it last longer and reducing the overall weight of the guitar by reducing the weight of the brace bar.

  In order to achieve the above object, a brace bar according to the present invention is attached to the inner surface of a front plate of a guitar, and in the brace bar that supports the front plate, a side profile line on a cross section is predetermined from the lower end on at least one side. It is characterized in that it includes a portion provided in a taper shape toward the upper end after being curved toward the center from the position of the predetermined height.

  The brace bar attached to the inner surface of the front plate of the present invention improves the reverberation of the front plate by further improving flexibility while maintaining rigidity, and the reverberation lasts longer, and the brace bar and the guitar The total weight is small, and it provides the effect of providing convenience for the player.

  Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

  6 is a perspective view showing a brace bar attached to the inner surface of a guitar front plate according to an embodiment of the present invention. FIG. 7 is an enlarged perspective view showing a part of the main brace bar shown in FIG. 8 is an enlarged cross-sectional view of the brace bar along the line BB ′ of FIG. 6, and FIG. 9 is a cross-sectional view of the brace bar according to another embodiment of the present invention.

  As shown in FIGS. 6 and 7, the brace bars 26 and 26a according to one embodiment of the present invention are attached to the inner surface of the front plate 1a of the guitar as in the prior art and function to support the front plate 1a. As shown in FIG. 8, the brace bars 26, 26a have a side profile on the cross section that is vertical from the lower end to a predetermined height (h), and from the predetermined height position (p) to the center side. A portion (c) having a contour line that is tapered toward the upper end after being curved is included.

  In the embodiment shown in FIG. 8, the above-mentioned contour lines are formed on both side surfaces. In the embodiment shown in FIG. 9, the above-mentioned contour line is formed on only one side surface, and the other side surface is vertical. It is formed. The degree of curvature on both sides of the brace bar in FIG. 8 and the degree of curvature on one side in the brace bar in FIG. 9 are similar to each other. Accordingly, the two brace bars have substantially the same firmness and flexibility.

  A part of the brace bar of the present invention has a side profile on the cross section that is vertical at a predetermined height from the lower end, and is curved inward from the predetermined height instead of being parabolic as in the case of FIG. Since the taper is tapered toward the upper end, the degree of side curvature is greater than in the case of FIG. If the overall height of the brace bar is slightly higher than that of FIG. 5, the flexibility is improved while having the same rigidity as the brace bar of FIG.

  As described above, when the flexibility of the brace bar is improved, there is an effect that the reverberation performance of the front plate is improved and the reverberation lasts longer when playing the guitar.

  In addition, the brace bar of the present invention has a slightly larger side curvature than the case of FIG. 5, so that the weight is slightly reduced, thereby reducing the weight of the guitar and allowing the player to use it more conveniently. is there.

  Although the present invention has been described in detail only with reference to examples, it is obvious to those skilled in the art that various changes or modifications can be made without departing from the spirit and scope of the present invention. is there. Accordingly, it is to be understood that such changes or modifications fall within the scope of the appended claims.

It is a disassembled perspective view of a general guitar. It is sectional drawing of the guitar of FIG. It is a perspective view which shows the brace bar of an example of the past attached to the inner surface of the front board of a guitar. It is a perspective view which shows the brace bar of the other conventional example attached to the inner surface of the front board of a guitar. FIG. 5 is a cross-sectional view of the brace bar taken along line A-A ′ of FIG. 4. It is a perspective view which shows the brace bar attached to the inner surface of the front plate of the guitar which concerns on one Example of this invention. It is an expansion perspective view which shows a part of main brace bar shown in FIG. FIG. 7 is an enlarged cross-sectional view of the brace bar taken along line B-B ′ of FIG. 6. It is sectional drawing of the brace bar which concerns on the other Example of this invention.

Explanation of symbols

1 Guitar body 1a Front plate 2 Block 3 Neck 3a Insertion part 3b Heel
4 Fingerboard 5 Bridge 6 Brace bar 7 Head 8 Guitar wire 9 Fingerboard adjustment iron core 16, 16 ', 16a, 16'a, 16b, 16'b Brace bar 26, 26a Brace bar

Claims (3)

In the brace bar attached to the inner surface of the guitar front plate and supporting the front plate,
The side contour line on the cross section includes a portion that is vertical at a predetermined height from the lower end and is tapered toward the upper end after being curved from the predetermined height position toward the center side. Features a brace bar.   The brace bar according to claim 1, wherein the side surface contour lines are formed on both side surfaces.   The brace bar according to claim 1, wherein the side surface contour line is formed on one side surface, and the other side surface is a vertical surface.

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