JPH02187792A - Drum sound reflector - Google Patents

Abstract

PURPOSE:To miniaturize a drum and to improve the versatility and directivity thereof by mounting sound reflecting plates having a specific shape on the lower side of the drum. CONSTITUTION:The drum sound reflector is formed by mounting the sound reflecting plates 3 consisting of a flat plate-shaped flexible synthetic resin at every suitable interval to the peripheral edge in the lower end part of the drum 4 by means of drum mounting fittings 4. The reflecting plate 3 is formed by curving the plate to an inverted semicircular conical shape which has an arc shape on the upper edge and the base of which is the upper edge. The fittings 4 are freely attachably and detachably mounted and the outer surfaces in the contact parts of hoop rests 5 thereof are riveted to one end of rigid arm plates 9. The other end of the arm plates 9 is riveted to the reflecting plates 3. The reflecting plates 3 are thus fixed by the fittings 4. The drum is miniaturized and a narrower space is good for storage if the reflector is formed in such a manner. In addition, the transportation is easy. This reflector is commonly usable for drums of different diameters and the sufficient directivity is provided in the direction of reflecting sounds so that the sufficient far reaching characteristic is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drum sound reflector that is attached to the underside of a drum and reflects drum sound forward.

[Conventional technology]

In a marching band performing outdoors, the sound of wind instruments can reach far in front, but because the sound of snare drums and tom-toms does not travel quickly, only the sound of wind instruments can be heard prominently when listening to a song played from a distance. .

For this reason, in marching bands, a drum sound reflector is attached to the bottom of the snare drum or tom-tom to reflect the drum sound forward, so that the drum sound can reach far ahead.

FIG. 7 shows a conventional drum sound reflector.

This reflector A is a synthetic resin molded product having a spherical surface divided into four parts, and a drum fitting part a that is fitted to the outer periphery of the lower hoop of the drum is formed on its upper edge.

FIG. 8 shows the drum sound reflector A attached to the snare drum 1. At the same time, the drum 1 is secured by joining plane fasteners (velvet fasteners commonly called Velcro) b that have been adhered to the inner circumferential surface of the drum fitting portion a and the outer circumferential surface of the lower hoop 2, respectively. mounted on.

If the reflector A is attached to the bottom of the drum 1, the drum sound will be reflected on the inner peripheral surface of the reflector A and will come out from the front opening of the reflector A, thereby reducing the drum sound. It can reach far ahead.

[Problem to be solved by the invention]

However, since the conventional drum sound reflector A is a three-dimensional object formed by dividing a spherical surface into four parts, it takes up a lot of space to remove and store from the drum 1 when not in use, and is also troublesome to transport. However, since the diameter of the drum fitting part a of reflector A is fixed, it cannot be used for drums of the same type but with different diameters, so reflector A must be sized to match the diameter of each drum. had to be manufactured. Furthermore, since the sound reflecting surface of the conventional reflector A is spherical, the drum sound reflected by the reflector A is reflected in random directions, up and down, as shown by the arrows in Figure 8. Since the drum sound is diffused widely in all directions, there is no directivity in the direction of the reflected sound, and the speed of delivery of the drum sound is not sufficient.

The present invention was made in view of the above-mentioned circumstances, and aims to provide a structure that does not take up much space for storage, is easy to transport, can be used with drums of different diameters, and has a reflective structure. To provide a drum sound reflector capable of providing sufficient speed delivery by imparting directionality to the direction of sound.

[Means to solve the problem]

The drum sound reflector of the present invention is made of a flat flexible synthetic resin plate with an arcuate upper edge, and the upper edge of the sound reflecting plate is curved into an inverted semi-conical shape with the upper edge as the base. A plurality of drum attachments removably attached to the periphery of the lower end of the drum are provided with metal fittings at appropriate intervals.

[Effect]

That is, in the drum sound reflector of the present invention, the sound reflecting plate is curved into an inverted semi-conical shape with its upper edge as the base, and a plurality of drum attachments provided at appropriate intervals on the upper edge of the sound reflecting plate are mounted using metal fittings. It is attached to the bottom of the drum by attaching it to the periphery of the lower end of the drum, and the inner circumferential surface of the sound reflection plate, which is curved into an inverted semi-cone, acts as a sound reflection surface that reflects the drum sound forward. to reflect the drum sound forward.

In this drum sound reflector, the sound reflecting plate is flat, so the entire reflector is flat when removed from the drum, so it does not take up much space for storage.
Furthermore, it is easy to transport, and since the sound reflection plate can be bent to any desired curvature, it can be used for drums of different diameters. Furthermore, in this drum sound reflector, since the sound reflecting surface formed by curving the sound reflecting plate is an inverted conical surface, the sloped surface from the bottom to the top of this inverted conical surface becomes a substantially straight surface. Therefore, since the reflection angle of the drum sound reflected by the sound reflecting plate in the vertical direction is substantially uniform, it is possible to provide directivity in the direction of the reflected sound and obtain sufficient speed delivery.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 and 2 are a front view and a plan view of the drum sound reflector in a state where it is removed from the drum, and FIG. 3 is an enlarged sectional view taken along the line ■-■ in FIG. 1.

The drum sound reflector of this embodiment includes a sound reflecting plate 3 made of a flat flexible synthetic resin plate, and a plurality of (four in the figure) for attaching the sound reflecting plate 3 to the periphery of the lower end of the drum. The drum attachment consists of metal fittings 4. The sound reflecting plate 3 is
It is manufactured by cutting a flexible synthetic resin board (vinyl chloride board, ABS resin board, etc.) with a thickness of 1 mm to 1.5+ nm, and the diameter of the bottom surface of this sound reflecting board 3 is the same as the diameter of the drum. Two inverted cones are almost the same and have an inclination angle of approximately 45″ on the circumferential side.
It is formed into a fan-shaped shape with an arcuate upper edge, which is an extension of the circumferential surface of an inverted semi-cone divided vertically. This sound reflecting plate 3
The drum is curved into an inverted semi-conical shape with the upper edge as the base by curving the arc-shaped upper edge along the bottom periphery of the inverted semi-cone as shown by the chain line in FIG. It is attached to the lower side of the drum using a metal fitting 4.

The drum mounting metal fitting 4 is removably attached to the lower flap of the drum.
They are located at two locations, one at both ends of the upper edge of the sound reflecting plate 3, and the other at the center of the upper edge, and provided at equal intervals. In this drum mounting, as shown in FIG. 3, the metal fitting 4 has a hoop contact portion 5a that contacts the outer surface of the lower hoop 2 of the drum, and a metal fitting 4 that is bent at a substantially right angle from this hoop contact portion 5a to the hoop 2. A lower portion is formed between an L-shaped hoop receiver 5 consisting of a rising portion 5b facing away from the upper end, and a hoop abutting portion 5a of the hoop receiver 5 that abuts the inner surface of the lower hoop 2. It consists of a hoop presser 6 that holds the hoop 2, and a bolt 7 and a wing nut 8 that press the hoop presser 6 against the inner surface of the lower hoop 2.The drum attachment is done by the metal fitting 4 being attached to the lug receiver 5. The other end of the rigid arm plate 9 whose one end is riveted to the outer surface of the hoop contact portion 5a is connected to the sound reflecting plate 3.
It is attached to the sound reflecting plate 3 by riveting to the upper edge of the plate. Further, the hoop presser 6 is held at its base end in a long hole 10 provided in the rising portion 5b of the hoop receiver 5, and is movable toward and away from the hoop contact portion 5a of the hoop receiver 5. ing. The head of the bolt 7 is fitted into the hoop presser 6 in a non-rotating manner, and is inserted into the hoop contact portion 5a of the hoop receiver 5 and the screw insertion hole provided in the arm plate 9. A wing nut 8 that abuts the outer surface of the hoop contact portion 5a of the hoop receiver 5 via the arm plate 9 is screwed onto the end of the hoop receiver 5. Also 11
is a coil spring loosely fitted onto the bolt 7 and interposed between the hoop presser 6 and the hoop receiver 5, and the hoop presser 6 is pressed against the inner surface of the lower hoop 2 by tightening the wing nut 8. The lower hoop 2 is clamped and fixed between the hoop contact portion 5a of the hoop receiver 5, and by loosening the wing nut 8, the lower hoop 2 is removed by the spring force of the coil spring 11.
spaced from the inner surface of the

FIG. 4 shows the above-mentioned drum sound reflector attached to the snare drum 1. This reflector reflects sound by curving the upper edge of the sound reflecting plate 3 along the lower edge of the drum 1. The plate 3 is curved into an inverted semi-conical shape with its upper edge as the base, and the drum attachment provided on the upper edge of the sound reflecting plate 3 is connected to the metal fitting 4 at the lower end of the drum 1, that is, at the lower hoop 2.
It is attached to the lower side of the drum 1 by attaching it to the drum.

When the above-mentioned drum sound reflector is attached to the lower side of the drum 1 with the sound reflecting plate 3 curved in an inverted semiconical shape, the inner peripheral surface of the sound reflecting plate 3 curved in an inverted semiconical shape serves as a sound reflecting surface that reflects the drum sound forward, and the drum sound is reflected forward as shown by the arrow in FIG. In addition,
The inclination angle of the sound reflecting surface formed by curving the sound reflecting plate into an inverted semi-conical shape (the angle of the inclined surface from the bottom to the top of the inverted conical surface) is approximately 45'', and the angle from the drum 1 to just below it is approximately 45". The drum sound emitted toward the drum is reflected almost horizontally by the sound-reflecting surface.

However, in the above drum sound reflector, since the sound reflecting plate 3 is originally flat, when removed from the drum 1, the entire reflector becomes flat as shown in FIG. It does not take up much space and is easy to transport. Moreover, in the drum sound reflector, since the sound reflection plate 3 can be curved to an arbitrary curvature, it can be used for drums with different diameters. Furthermore, in this drum sound reflector, since the sound reflecting surface formed by curving the sound reflecting plate 3 is an inverted conical surface, the inclined surface from the bottom to the top of this inverted conical surface is almost a straight line. (However, the inclined surfaces near the sound exit, that is, near both side edges of the sound reflecting plate 3, are curved surfaces that swell outward to some extent), and therefore the upper and lower sides of the drum sound reflected by the sound reflecting plate 3. Since the reflection angle in the direction is almost uniform, sufficient speed delivery can be obtained by giving directionality to the direction of the reflected sound.

In the above embodiment, the sound reflection plate 3 has a fan-shaped shape, but the sound reflection plate 3 is not limited to the fan shape.In short, the upper edge of the sound reflection plate 3 has an arc shape, and the upper edge of the arc shape is connected to the lower end of the drum. Any shape may be used as long as it is curved into an inverted semi-conical shape with the upper edge as the base when curved along the peripheral edge.

5 and 6 show other embodiments of the invention. In the drum sound reflector of this embodiment, the sound reflection plate 3 is shaped as shown in FIG. It is attached to the drum 1 like this.

Further, in the above embodiment, a drum sound reflector used for the snare drum 1 was described, but the present invention can also be applied to a drum sound reflector for tom-toms and tenor drums.
It can also be applied to a drum sound reflector for a single-head tom that has a drum head only on the upper side. In addition, the drum sound reflector used for single-head toms is attached to the single-head tom by sandwiching the outer edge of the top end of the drum body with metal fittings 4, which are attached to the upper edge of the sound deflector plate 3. . In addition, there are two types of single-head toms: those with a cylindrical lower end of the drum body, and sonic-cut toms with a diagonally cut front side of the lower end of the drum body to improve sound clarity. However, the drum sound reflector of the present invention can be used in any of them.

Furthermore, in the above embodiment, the drum mounting provided on the upper edge of the sound resistance plate 3 is such that the metal fitting 4 is held between the lower end periphery of the drum (the hoop 2 or the lower end periphery of the drum body). The metal fittings may have any configuration as long as they can be detachably attached to the periphery of the lower end of the drum.

〔Effect of the invention〕

The drum sound reflector of the present invention is made of a flat flexible synthetic resin plate with an arcuate upper edge, and the upper edge of the sound reflection plate is curved into an inverted conical shape with the upper edge as the base. The multiple drum attachments, which are removably attached to the periphery of the lower end of the drum, have metal fittings spaced at appropriate intervals, so they do not take up much space to store and are easy to transport, and can be attached to drums of different diameters. Not only can it be used for both purposes, but it can also provide directivity in the direction of the reflected sound and provide sufficient speedy delivery.

[Brief explanation of the drawing]

FIGS. 1 to 4 show an embodiment of the present invention. FIGS. 1 and 2 are a front view and a plan view of a drum sound reflector, and FIG. 3 is a diagram showing ■-■ of FIG. Enlarged sectional view along the line, No. 4
The figure is a perspective view of the drum sound reflector attached to the drum. 5 and 6 are a front view of a drum sound reflector and a perspective view of a drum mounted state showing another embodiment of the present invention. FIG. 7 and FIG. 8 are perspective views of a conventional drum sound reflector and a perspective view of the state in which the drum is mounted. 4... Sound counterboard, 5... Metal fittings for drum mounting. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] A drum sound reflector that is attached to the underside of a drum and reflects the drum sound forward is made of a flat flexible synthetic resin plate with an arcuate upper edge, and has an inverted half with the upper edge as the base. A drum sound reflector, characterized in that a plurality of drum mounting fittings, which are removably attached to the periphery of the lower end of the drum, are provided at appropriate intervals on the upper edge of the conically curved sound reflection plate.