JPS595894Y2 - Snare drum acoustic ray contact/separation device - Google Patents

Description

[Detailed description of the invention] This invention relates to a sound ray contact/separation device for a snare drum.

Conventionally, a sound wire connecting/separating device for bringing a sound wire provided on a snare drum into contact with and separating from a drum head has been equipped with elevating members on both sides of the drum body, the lower ends of which protrude downward from the lower end of the drum body. It is known that a sound wire is provided between the tips of the pair of elevating and lowering members, and the elevating and lowering members are raised and lowered via a link mechanism by rotating an operating lever. The sound wire is moved toward and away from the drum head by rotating the operating lever.

However, in the conventional sound line contact/separation device, the elevating member and the link mechanism for elevating it are directly connected, so the link rod must be replaced with one of a different length or its pivot position may be changed. It has the disadvantage that the contact pressure of the acoustic wire against the drum head cannot be adjusted unless something is changed.

In addition, even in the above-mentioned conventional sound line contact/separation device, the sound line contact pressure can be weakened by stopping the operating lever midway through rotation without rotating it to its rotation limit; If you play without it, the vibrations caused by the performance will cause the control lever to shift, causing the contact pressure of the sound wire to fluctuate during the performance.

This idea was created in view of the above-mentioned circumstances, and its key points are that it not only makes it possible to move the sound line toward and away from the drum head with a single touch, but also to reduce the sound waves to the drum head. To provide a sound line contact/separation device for a snare drum in which the contact pressure of the line can also be arbitrarily adjusted with a simple operation.

An embodiment of this invention will be described below with reference to the drawings.

In Figure 1, 1 is the drum body of the snare drum, and 2 is the drum body of the snare drum.
3 indicates a drum head, and 3 indicates a drum head presser.

In addition, in FIGS. 1 to 3, 4 and 4 refer to the drum body 1.
A pair of base members 5, 5 are attached to both outer surfaces of the drum body 1, and the pair of base members 5, 5 are held movably up and down by the base members 4, 4, respectively, with their lower ends protruding downward from the lower end of the drum body 1. Lifting members 6, 6 refer to both the lifting members 5, 5.
Two parallel guide rods 7, 7, each having both ends fixed to the lower end and extending below the lower drum head 2, are slidably supported by the two guide rods 6, 6. The sound wire mounting members 7, 7 are located at both ends of the guide rods 6, 6, and fix both ends of the sound wire 8.

As shown in FIGS. 4 and 5, the base members 4, 4 are in contact with the outer surface of the drum body 1 and are fixed from the inside of the drum body 1 by setscrews 9, 9. The members 4, 4 are formed with a vertical groove 10 whose central portion is open to the outer surface of the base member 4 and which passes through the top and bottom of the base member 4, as shown in FIGS. 5 and 8. There is.

On the other hand, in FIG. 1, reference numeral 11 is a rotating shaft that is provided horizontally passing through the center of the drum body 1, and this rotating shaft 11 is connected to the base member 4 as shown in FIGS. 4 and 5.
Both ends of the rotating shaft 11 are supported by bearing tubes 12 provided therein, and rotating arms 13 provided in the longitudinal grooves 10 of the base member 4 are attached to both ends of the rotating shaft 11.

As shown in FIG. 8, the rotating arm 13 is
The lower end of the rotary arm 13 is fixed to the rotating shaft 11 so as to face upward, and the upper end of the rotary arm 13 is pivotally supported by a roller 14 provided on the outside thereof.

Furthermore, one of the rotary arms 13 provided in the longitudinal grooves 10 of both base members 4, 4 has a rotary structure as shown in FIGS. 4 and 8. A rotary operation lever 15 for approaching and separating the sound beam is integrally provided and extends from the upper end of the movable arm 13 to above the base member 4, and one of the rotary arms 13 can be operated by rotating the operation lever 15. It is designed to be rotated.

The operating lever 15 is rotated from the state indicated by the solid line in FIG. 8 to the position indicated by the two-dot chain line.
Relief groove for 16. 16 are provided.

Further, the other rotating arm (not shown) not having the operating lever 15 is configured to be rotated together with the one rotating arm 13 via the rotating shaft 11.

Further, in FIGS. 4 and 5, reference numeral 17 is an elevating plate provided in the longitudinal groove 10 of both base members 4, 4 so as to be able to rise and fall, and this elevating plate 17 is attached to the outer surface of the rotating arm 13. They are in sliding contact and are guided by the longitudinal grooves 10 to move up and down.

Further, as shown in FIGS. 9 and 10, this elevating plate 17 has a roller engagement groove 1B formed in its sliding surface with the rotating arm 13, and a portion of the elevating member 5 is formed on the outside of the upper end. The roller engaging groove 18 has a shape in which one side from the middle part is inclined obliquely upward and the other side from the middle part is almost horizontal. It is said to be the long groove of

This elevating plate 17 is arranged in the roller engaging groove 1.
A roller 14 pivotally supported by the rotating arm 13 in B
is slidably fitted in the longitudinal groove 10 of the base member 4, and is raised and lowered as shown in FIGS. 11 and 12 by rotation of the rotation arm 13. It has become.

Further, as shown in FIGS. 4 to 6, the elevating member 5 is an elevating rod 5a that is slidably contacted with the outer surface of the elevating plate 17 and is held movably in the vertical groove 10 of the base member 4.
and an end member 5b removably attached to the lower end of the lifting rod 5a.
b is fixed to the lifting rod 5a with a set screw 20.

Further, a screw hole 21 is perpendicularly bored in the upper end of the lifting rod 5a, and a vertical hole 22 provided in the protrusion 19 of the lifting plate 17 is rotatably held in the screw hole 21. A sound line contact pressure adjustment screw 23 is screwed together.

Further, 24 is an operation knob attached to the upper end of the sound line contact pressure adjustment screw 23, and 24 is an operation knob attached to the upper end of the sound line contact pressure adjustment screw 23
3 is restrained from vertical movement by sandwiching the protrusion 19 of the elevating plate 17 between a flange 23 a protruding from the outer periphery of its intermediate portion and the operation knob 24 .

That is, the sound line contact pressure adjusting screw 23 connects the protruding portion 19 of the lifting plate 17 and the lower end portion of the lifting member 5 (lower end portion of the lifting rod 5a) so that the interval can be adjusted. The elevating member 5 is raised and lowered independently by turning the acoustic line contact pressure adjustment screw 23, and when the elevating plate 17 is raised and lowered, it is raised and lowered together with the elevating plate 17.

On the other hand, the guide rods 6, 6 are connected to the acoustic wire mounting member 7.
. 5 (both sides of the lower end of the end member 5b) by set screws 25, 25.

Further, the end members 5b, 5b of the elevating members 5, 5 are provided with a horizontal through hole 26 at the center of each lower end, and the through hole 26 has a proximal end connected to the acoustic wire mounting member 7. A sound wire tension adjustment screw 27, which is screwed and fixed, is loosely inserted.

28 is a tension adjustment knob screwed onto the tip of the sound wire tension adjustment screw 27;
It is brought into contact with the outer surface of the elevating member 5 (the outer surface of the end member 5b) with a tensile force of .

The sound wire tension adjustment screw 27 connects the lower ends of the lifting members 5, 5 and the sound wire mounting members 7, 7 so that the distance between them can be adjusted.When the tension adjustment knob 28 is turned,
A sound wire tension adjustment screw 27 screwed therein moves together with the sound wire mounting member 7, thereby adjusting the tension of the sound wire 8.

Further, as shown in FIG. 7, the sound wire mounting members 7, 7 are slidably supported by the guide rods 6, 6 through rod through holes 29, 29 provided on both sides thereof,
It is guided by these two guide rods 6, 6 to move forward and backward.

Further, the sound wire 8 is made of a large number of steel wires arranged in a band shape, like stretched coil springs, and both ends of each steel wire are soldered to a pair of end pieces 9a, 8a, respectively. The sound wire 8 has end plates (-Ba, Ha) on both ends thereof fixed screws 30. on the upper surfaces of the sound wire mounting members 7, 7, respectively. 30, it is stretched between the two acoustic wire attachment members 7, 7.

In this example, the acoustic wire 8 has half the number of steel wires as the commercially available product (having 20 steel wires), and two of the acoustic wires 8 are stretched side by side. As the wire 8, a commercially available wire may be used.

Thus, the sound wire 8 stretched below the lower drum head 2 is brought into contact with and separated from the drum head 2 by rotating the sound wire contact/separation rotary operating lever 15. When the operating lever 15 is rotated to the position shown in FIG. ) due to the rotation of the roller 14.
The elevating plate 17 is pushed up through the roller engagement groove 18, and the elevating member 5, together with the second elevating plate 17,
5 is pulled up to bring the acoustic wire 8 into contact with the drum head 2.

Note that when the sound wire 8 is in contact with the drum head 2, the roller 14 is located in the horizontal portion of the roller engagement groove 18, so vibrations during performance or the like may cause the rotating arm 1 to move.
3 and the operating lever 15 will not shift.

Further, in order to separate the acoustic wire 8 from the drum head 2, the operation lever 15 may be rotated as shown in FIG.
In this case, by rotating the rotating arm 13, the lifting plate 1
7 is pushed down, and the lifting plates 17 are pushed down together with the lifting members 5, 5 to separate the acoustic wire 8 from the drum head 2.

Further, the contact pressure of the sound wire 8 with respect to the drum head 2 can be adjusted by using the sound wire contact pressure adjusting screw 24. This can be done by turning 24 and raising and lowering the lifting members 5, 5 independently.
This sound line contact pressure is adjusted by the sound line contact pressure adjusting screw 24,
This can be done simply by turning 24, and the contact pressure can also be finely adjusted.

On the other hand, the tension of the sound wire 8 can be adjusted using the tension adjustment knob 28.
．． 28 and tighten the tension adjustment screw 27 to the sound wire mounting member 7.
, 7, and in this case, the sound wire mounting members 7, 7 are moved forward and backward together with the two guide rods 6, 6.
Since the sound wire mounting members 7, 7 can be moved forward and backward smoothly, the sound wire mounting members 7, 7 can be moved forward and backward smoothly.

Since the sound wire mounting members 7, 7 are supported by the two guide rods 6, 6, the sound wire mounting members 7, 7 do not wobble or tilt.
Therefore, the acoustic wire 8 can always be brought into flat contact with the two surfaces of the drum head.

In addition, when replacing the drum head 2, the elevating member 5,
Set screw 2 fixing the lifting rod 5a of No. 5 and the end member 5b
0 and the end members 5b, 5b and the guide rods 6, 6 and the sound wire 8 between them can be removed as a unit, with the sound wire 8 still stretched. Guide rod 6, which gets in the way when replacing.
The drum head 2 can be replaced more easily than when the drum head 6 and the sound wire 8 are individually removed (this also applies to the case where the sound wire 8 is replaced).

However, from the lifting members 5, 5 to the sound line contact pressure adjustment screw 2.
3, the lifting members 5, 5 can be removed as a unit together with the guide rods 6, 6 and the sound wire 8. Therefore, the lifting members 5, 5 are not necessarily connected to the lifting rod 5a and the end member 5b. Note that in the above embodiment, the sound wire mounting members 7, 7 are supported by the guide rods 6, 6, but the sound wire mounting members 7, 7 do not need to be separated into two parts. In that case, as shown in FIGS. 13 and 14, a through hole 31 having a rectangular cross section is provided at the lower end of the elevating member 5.
1 has a sound wire mounting member 3 having the same cross-sectional shape as this through hole 31.
2 is slidably fitted against rotation, and this sound wire mounting member 3
The sound wire tension adjustment knob 28 which is in contact with the outer surface of the elevating member 5 may be screwed into the sound wire tension adjustment screw 27 provided protruding from the height adjustment member 2 .

Although the elevating and lowering mechanism of the elevating member 5 in this embodiment is similar to that of the previous embodiment, the same reference numerals are given in the drawings and the explanation thereof will be omitted.

However, in this embodiment, the guide rods 6, 6 that support the sound wire mounting member 32 are not necessary, but in order to prevent the elevating member 5 from tilting due to the tensile force of the sound wire 8, at least one guide rod is required.
It is desirable to provide a book support rod 6a.

Further, in the embodiment described above, the rotary operating lever 15 for adjusting the sound line contact pressure is integrally formed with the rotating arm 13, but it goes without saying that this operating lever 15 may be attached to the rotating shaft 11. .

Since the snare drum acoustic wire contact/separation device of this invention is as described above, it is not only possible to bring the sound wire into contact with and release from the drum head with a single touch operation, but also to easily reduce the contact pressure of the sound wire against the drum head. It can be adjusted arbitrarily by operation.

[Brief explanation of the drawing]

Figures 1 to 12 show an example of this invention.
Figures 1 and 2 are a front view and a bottom view of the whole, Figure 3 is a side view, Figure 4 is an enlarged longitudinal sectional front view of a portion, and Figure 5 is a front view of the whole.
The figure is a sectional view taken along line A-A in Figure 4, and Figure 6 is a sectional view taken along line B-B in Figure 4.
7 is a sectional view taken along the line CC in FIG. 4, FIG. 8 is a side view of the rotating arm installed in the base member, and FIG.
1 and 10 are a side view and a longitudinal sectional front view of the elevating plate, and FIGS. 11 and 12 are side views showing the elevating and lowering operation of the elevating plate. Figures 13 and 14 show other embodiments of this invention, with Figure 13 being a longitudinal sectional side view and Figure 14 being the D of Figure 13.
-D line sectional view. DESCRIPTION OF SYMBOLS 1... Drum body, 2... Drum head, 4... Base member, 5... Lifting member, 8... Sound line, 11...
・Rotating shaft, 13... Rotating arm, 14... Roller,
DESCRIPTION OF SYMBOLS 15... Rotation operation lever for contacting and separating the sound line, 17... Elevating plate, 18... Roller engagement groove, 19... Projection, 23... Sound line contact pressure adjusting screw.

Claims (1)

[Scope of utility model registration request] A pair of base members attached to both outer surfaces of the drum body, a pair of elevating members that are held movably up and down by both base members and protrude downward from the lower end of the drum body, and a lower end of the two elevating members A mechanism that stretches a sound wire between the
Rotating arms fixed to both ends of a horizontal rotating shaft passing through the drum body and provided in both base members; and rotating arms movable up and down in both base members and engaging with the rotating arms. an elevating plate that is raised and lowered by the rotation of a rotating arm; a protrusion that protrudes outside the upper end of the elevating plate, facing the upper end of the elevating member provided on the outer side of the elevating plate; A sound line contact pressure adjustment screw connects the protrusion of the elevating plate and the upper end of the elevating member in an adjustable manner, and extends above the base member from either one of the rotating arms or the rotating shaft. A sound ray contact/separation device for a snare drum consisting of a rotary operation lever for connecting/separating the sound ray.