JPS604231Y2 - Valve mounting structure for keyboard instruments - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the structure of valve attachment for keyboard instruments.

For example, in the case of a keyboard wind instrument, the ventilation hole in the flute chamber, which is normally blocked by a valve, is opened by operating a key, thereby causing the reed to vibrate and produce sound.

To describe this in more detail with reference to FIG. 1 showing a conventional example, in this type of keyboard wind instrument, when the key 1 is pressed, the key 1 resists the force of the spring 2 and moves against the frame 3. It rotates in the direction of arrow P using the protrusion 4 as a fulcrum, and accordingly, the lever 5, which is provided hanging down from the bottom of the key 1, rotates in the same direction together with the valve 6 attached to its tip.
The vent hole 8 of the flute chamber 7, which is normally blocked by this valve 6, is opened, and the air blown into the air passage from the mouthpiece (not shown) is thereby allowed to flow into the air chamber 9. The air passes sequentially through the window formed in the reed plate 10 and the flute chamber 7, and is emitted from the ventilation hole 8, and the air is attached to the reed plate 10 and vibrates to produce sound. .

However, in such a keyboard wind instrument, the lever 5 acts to open and close the valve 6 in conjunction with the key 1 when the key 1 is operated, and also acts as a stopper to regulate the height of the key 1. .

Therefore, conventionally, when adjusting the height of the key 1, a method was adopted in which the lever 5 itself was bent.

However, since the lever 5 itself is made of pressed aluminum and has a special shape, it is difficult to make appropriate adjustments.Moreover, when the lever 5 is bent, it is glued and fixed to the tip of the lever 5. The angle of the valve 6 changes, and the valve 6 no longer comes into close contact with the open end of the flute chamber 7 (portion of the ventilation hole 8), which inevitably causes problems such as air leakage occurring at that portion.

In order to avoid such a problem, it is sufficient if the height of the key 1 can be adjusted without bending the lever 5; Rather, we focused on the fact that the thickness of the bulb 6 and the G phase are related.

This idea was made in consideration of the above points, and focused on the fact that the height of the key 1 can be adjusted by changing the thickness of the valve 6, making it easy to adjust the height of the key 1 without bending the lever 5. The valve mounting of a keyboard instrument provides a structure that allows adjustment to the height of the key 1 and does not cause air leakage as described above even if the height of the key 1 is adjusted.

First, to describe the features of this invention, in this invention, the valve that blocks the ventilation hole of the whistle chamber is wedge-shaped as a whole, and the valve attached to the lever has a surface and a valve surface that blocks the ventilation hole. It is distinctive in that it is tilted.

Hereinafter, one embodiment of this invention will be described in detail with reference to the attached FIGS. 2 to 4.

The embodiment herein is an example applied to a keyboard wind instrument similar to that shown in FIG. 1 described above, and the parts other than the valve and the lever supporting it are the same as those shown in FIG. 1.

Therefore, the same reference numerals are used for the parts common to both figures, and the explanation thereof will be omitted.

FIG. 2 is an overall view corresponding to FIG. 1, FIG. 3 is an enlarged view of the part 2, and FIG. 4 is a perspective view of the valve.

As shown in these figures, in the valve 60 here, the side facing the ventilation hole 8 is made of a cushioning material 61 with good adhesion, such as goatskin material, sponge, or foamed vinyl chloride jeetna, and it is made of plastic. It is supported by a hard support substrate 62 such as
Protrusions 63a, 63 for attaching the lever 5 to one side of the
b is the same as the conventional one.

However, whereas in the conventional valve 6, the front and back surfaces of the cushioning material and the support substrate are parallel, that is, they have a constant thickness over the length direction, in the valve 60 here, one The thickness of the support substrate 62 is varied at a constant rate along its length.

As a result, Palflo 0 has a wedge shape as a whole, and the valve 60 is attached to the lever 5 on the surface 64.
(the bottom surfaces inside the protrusions 63a, 63b) and the valve surface 65 that closes the ventilation hole 8 are inclined to each other.

Therefore, when attaching such a valve 60 to the lever 5, as shown in FIG. 3, while bringing the cushion material 61 side of the valve 60 into close contact with the vent hole 8 portion of the flute chamber 7, the lever 5 is attached to the protrusion 63a.

63b and move the valve 60 in the direction of arrow A, the lever 5 can be displaced by Δ1 in the direction of arrow B due to the wedge action of the pulp 60 itself, thereby moving the front end of the key 1 to the position shown in FIG. It can be moved in the direction of arrow C.

Conversely, if the valve 60 is moved in the direction opposite to the arrow A direction, the lever 5 and the key 1 can be moved in the opposite direction from the upward direction.

This can be done by moving the valve 60.
This means that the height can be changed freely.

Moreover, due to the reduction effect of the wedge, the wedge-shaped valve 6
The displacement amount Δ1 of the lever 5 is small compared to the amount of movement of the lever 5, and the slight displacement amount Δ1 of the lever 5 is enlarged again by the lever action of the key 1, so the height of the key 1 is adjusted. The above can also be said to be preferable.

Therefore, by fixing the lever 5 and the valve 60 with adhesive or the like after such adjustment, the height of the key 1 can be adjusted without bending the lever 5 itself.

In the above embodiment, by varying the thickness of the support substrate 62 that supports the cushion material 61, the valve 60
is wedge-shaped as a whole, but the cushion material 61
By making the thickness of the cushioning material 61 and the support substrate 62 different, or by making the thickness of both the cushioning material 61 and the support substrate 62 different, or by making the mounting between the protrusions 63a and 63b, only the surface 64 is an inclined surface. Accordingly, valve 60
can also be wedge-shaped as a whole.

Furthermore, it goes without saying that this invention can be applied not only to keyboard wind instruments, but also to other valve-equipped reed instruments.

As detailed above, in this invention, the valve that blocks the ventilation hole of the flute chamber is wedge-shaped as a whole, so
By using the wedge effect of the valve itself, the height of the key can be adjusted without bending the lever, which eliminates the problem of air leakage at the ventilation hole.Moreover, the adjustment can be made by sliding the valve. This is much easier than adjusting the conventional lever by bending it.

In addition, with the height position of each key regulated by a flat plate-shaped stopper member, etc., each valve can be slid and fixed with adhesive etc. when it stops, so that the valve installation and It is also possible to automate the height adjustment of the key.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an example of a conventional keyboard wind instrument, Fig. 2 is a side sectional view showing an embodiment of a keyboard wind instrument to which this invention is applied, and Fig. 3 is an enlarged view of the ■ part. , FIG. 4 is an overall perspective view of the valve used in this invention. 1...Key, 5...Lever, 60...
...Valve, 64...The mounting surface of the valve to the lever, 65...The valve surface that blocks the ventilation hole, ...The ventilation hole. 7...Flute room, 8...

Claims (1)

[Scope of utility model registration request] It has a lever with one end attached to the bottom of the key, and a valve attached to the other end of the lever, and the ventilation hole of the flute chamber, which is normally blocked by this valve, can be opened by operating the key. In the keyboard instrument which opens, the valve is wedge-shaped as a whole, and the valve is attached to the lever so that the face and the face of the valve that closes the ventilation hole are inclined. Valve installation is structural.