JP2004354492A - Piston valve mechanism for brass instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new piston valve mechanism for brass instrument that can realize a sound of a natural and efficient brass instrument by obtaining a duct which makes it easy to hold a musical instrument and facilitates valve operation much smoother than a conventional product by properly increasing and setting a piston external diameter as a piston valve for brass instrument which does not have a plurality of communicating tubes on the same plane crossing a piston moving shaft in a piston. <P>SOLUTION: The piston valve for brass instrument which does not have a plurality of communicating tubes on the same plane perpendicular to the piston moving shaft in the piston. For a smooth duct, the external diameter of the piston is properly increased to be set, and a piston external communicating tube and a piston internal communicating tube are provided on the same plane parallel to the piston moving shaft to make it easy to hold the musical instrument and facilitate valve operation. Further, the most important feature is that adjacent valve-casing side surfaces are connected to each other to realize a valve section which is tough in strength. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a brass instrument piston valve mechanism.
[0002]
[Prior art]
The piston valve mechanism of a brass instrument is a mechanism in which a cylindrical piston performs reciprocating piston movement inside a cylindrical tube called a valve casing to switch a pipe line. Usually, three communication pipes, upper, middle, and lower, are arranged inside each piston. When the piston is not operated, air passes through a communication pipe below the inside of the piston. On the other hand, when the piston is pushed down, the air flows to the bypass pipe via the two communication pipes inside and inside the piston.
[0003]
In the case of a brass instrument piston valve, a so-called three-valve having a bypass pipe of a different length is the most common form. In this case, by operating a piston called the first piston, the whole sound pipe is extended, the second piston plays a semitone, and the third piston plays a half of the whole sound.
[0004]
Conventional example 1 shows the most frequently used piston valve structure at present. FIG. 5 is an explanatory diagram of the pipeline when the conventional example 1 is viewed from below, but has a undulating and curved pipeline configuration, which has an adverse effect on the original sound of the musical instrument. FIG. 6 is a lateral view as viewed from the direction of A shown in FIG. 5, but also from this direction, it is a winding pipe.
[0005]
As shown in FIG. 7 of the conventional example 2, there is also a form in which the communication pipe outside the piston is constituted by a straight pipe. However, the communication pipe inside the piston is bent, and the communication pipe inside the piston and the external communication pipe are further bent. However, there is a serious drawback in that the pipe line breaks at the portion where it meets, and a continuous and smooth inner diameter shape cannot be obtained. FIG. 8 is a lateral view as viewed from the direction of the arrow A shown in FIG. 7. As in the first embodiment, the pipe is a twisted and bent pipe.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a brass instrument piston valve that does not have a plurality of communicating pipes on the same plane that is perpendicular to the piston movement axis inside the piston. A new brass piston for brass instruments that solves the problem of obtaining a much smoother pipe compared to that by appropriately setting the outer diameter of the piston, thereby realizing a natural and efficient sound of brass instruments. The provision of a valve mechanism.
[0007]
[Means for Solving the Problems]
The present invention provides a brass instrument piston valve that does not have a plurality of communicating pipes on the same plane that is orthogonal to the piston movement axis inside the piston. Set and provide a piston external communication pipe and a piston internal communication pipe on the same plane parallel to the piston movement axis, to facilitate instrument holding and valve operation, and to realize a strong valve section in strength. The most important feature is that the side surfaces of adjacent valve casings are connected to each other.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
In order to facilitate instrument holding and valve operation, and to realize a strong valve section in strength, adjacent valve casing sides are connected to each other, and in order to obtain a much smoother pipeline compared to conventional products, The outer diameter of the piston is appropriately enlarged, and a straight communication pipe outside the piston and a communication pipe inside the piston are provided on the same plane parallel to the piston movement axis.
[0009]
【Example】
FIG. 1 is a plan view of Embodiment 1 of a brass instrument piston valve mechanism according to the present invention as viewed from below. 1 is a first valve casing, 2 is a second valve casing, 3 is a third valve casing, 4 is a first piston, 5 is a second piston, 6 is a third piston, 7 to 10 are communication pipes outside the piston, 11 To 13 are communication pipes inside the piston, 14 is a first bypass pipe, 15 is a second bypass pipe, 16 is a third bypass pipe, and 21 is a plane parallel to the piston axis. 3, 5, and 7, the same numbers indicate the same parts.
[0010]
In FIG. 1, the L dimension indicating the width of the valve casing is too long for a trumpet or the like because the player holds the instrument with his / her left hand to hold the instrument. If the interval is too wide, the operation of the valve itself will be seriously affected. In the case of this embodiment, since the valve casing width L is 73 mm and the interval between the pushers 17 is 24 mm, the dimensions are the same as those of the conventional product, so that the holding of the musical instrument and the valve operation are easy. Further, the piston external communication pipes 7 to 10 are arranged on the same plane 21 parallel to the piston axis, and the piston internal communication pipes 11 to 13 are also arranged on the same plane 21. In order to realize this smooth pipeline, it is necessary to appropriately set the outer diameter of the piston pipe. In the case of this embodiment, the inner diameter of the communicating pipe is φ11.65 mm and the outer diameter of the piston pipe is , Φ19.2 mm, the outer diameter of the valve casing is φ25 mm, and the piston stroke is 16.5 mm.
[0011]
FIG. 2 is a cross-sectional view of the first embodiment of the present invention as viewed from a direction A shown in FIG. The same numbers as those in FIG. 1 indicate the same parts. Reference numeral 17 denotes a presser, 18 denotes a piston shaft, 19 denotes an upper cover, and 20 denotes a bottom cover. 4, 6, and 8, the same numbers indicate the same parts.
[0012]
Since the communication pipes 7 to 10 outside the piston and the communication pipes 11 to 13 inside the piston are located on the same plane 21 parallel to the piston axis, the pipeline shown by hatching in FIG. The curvature is shown. As a result of appropriately expanding the outer diameter of the piston pipe while keeping the L dimension in FIG. 1 constant, a very smooth pipe path is formed. In addition, the direction in which the air flows indicated by the arrow in the figure is not a problem even if it is the opposite direction.
[0013]
Since the pipe has a smooth shape with a gentle curve, and the inner cross-sectional shape is a continuation of a perfect circle, natural and efficient brass instruments can be realized. Furthermore, with the expansion of the outer diameter of the piston pipe, the upper and lower communication pipes through which air passes when the piston is pressed have the advantage that the two communication pipes can be set much more smoothly than the conventional small-diameter piston. . As a result, even when the piston is pressed, the air can be smoothly fed into the bypass pipe, so that the sound quality is improved.
[0014]
Normally, there are three upper, middle, and lower communication pipes inside each piston, but it is possible to prevent the interference between communication pipes seen in conventional products by appropriately setting the outer diameter of the piston. In addition, it is possible to realize a communication pipe having a perfectly circular cross section. The outer diameter of the piston is not fixed since it is a dimension appropriately set in consideration of the inner diameter of the communication pipe, the outer diameter of the valve casing, the piston stroke, the arrangement position of the bypass pipe, and the like.
[0015]
FIG. 3 is a plan view of Example 2 of the present invention as viewed from below. In fact, the current trumpet generally has the third bypass pipe 16 arranged in the same direction as the communication pipes 7 to 9 as shown in FIG. In the case of such an arrangement, when the third piston 6 is pushed down, the bypass pipe 16 can be arranged on the plane 21 which is exactly parallel to the piston axis. Moreover, since the inlets of the communication pipe 9 and the bypass pipe 16 are at the same height, the communication pipe 13 inside the third piston is a straight pipe. Further, in an actual musical instrument, the arrangement position of the first bypass pipe 14 may be different, but in such a case, the communication pipe 7 does not necessarily need to be arranged on the plane 21 parallel to the piston axis.
[0016]
FIG. 4 is a lateral view of Example 2 of the present invention when viewed from the direction of the arrow A shown in FIG. Since the communication pipe 13 inside the third piston is a straight pipe even when viewed from this direction, it forms an ideal pipe without bending. As described above, the present invention is a revolutionary invention that is realistic and very effective in actual use.
[0017]
【The invention's effect】
As described above, in the brass instrument piston valve mechanism of the present invention, since the width L of the valve casing is equal to the conventional dimension, it is easy to hold the instrument and operate the valve, while appropriately increasing the piston outer diameter. As a result, it is possible to realize a much smoother pipeline than conventional products, and furthermore, it is possible to prevent interference between communication pipes, so that unevenness does not occur in the inner diameter. As a result, it is possible to realize a natural and efficient brass instrument sound without uneven sound. Furthermore, by connecting and joining the adjacent valve casing side surfaces to each other, a strong and strong valve section is realized. In addition, there is no need for the support columns 22 for connecting the valve casings, which are found in conventional products, and it is economical.
[Brief description of the drawings]
FIG. 1 is a plan view of a brass instrument piston valve mechanism of the present invention. (Example 1)
FIG. 2 is a side view of the brass instrument piston valve mechanism shown in FIG. 1; (Example 1)
FIG. 3 is a plan view of the brass instrument piston valve mechanism of the present invention. (Example 2)
FIG. 4 is a side view of the brass instrument piston valve mechanism of FIG. 3; (Example 2)
FIG. 5 is a plan view of a conventional example of a brass instrument piston valve mechanism. (Conventional example 1)
FIG. 6 is a side view of the brass instrument piston valve mechanism of FIG. 5; (Conventional example 1)
FIG. 7 is a plan view of a conventional example of a brass instrument piston valve mechanism. (Conventional example 2)
FIG. 8 is a lateral view of the brass instrument piston valve mechanism of FIG. 7; (Conventional example 2)
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st valve casing 2 2nd valve casing 3 3rd valve casing 4 1st piston 5 2nd piston 6 3rd piston 7 Communication pipe outside piston 8 Communication pipe outside piston 9 Communication pipe outside piston 10 Communication outside piston Pipe 11 Communication pipe inside piston 12 Communication pipe inside piston 13 Communication pipe inside piston 14 First bypass pipe 15 Second bypass pipe 16 Third bypass pipe 17 Push 18 Piston shaft 19 Top cover 20 Bottom cover 21 Parallel to piston axis Plane 22 prop

Claims (1)

In a brass instrument piston valve that does not have a plurality of communicating pipes on the same plane perpendicular to the piston movement axis inside the piston, the piston external communication pipe and the piston internal communication are on the same plane parallel to the piston movement axis. A piston valve mechanism for a brass instrument in which a tube is provided and adjacent valve casing sides are connected to each other.

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