JPH0758432B2 - Drum sound reflector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drum sound reflector which is attached to a lower side of a drum and reflects a drum sound forward.

[Conventional technology]

In marching bands performing march outdoors, the sound of the wind instrument reaches far ahead, but since the drum sound of the snare drum and tom tom is not reachable easily, only the sound of the wind instrument stands out when listening to the performance song at a distance. hear.

For this reason, in the marching band, a drum sound reflector that reflects the drum sound toward the front is attached to the lower side of the snare drum or tom tom so that the drum sound reaches far ahead.

FIG. 7 shows a conventional drum sound reflector. The reflector A is a synthetic resin molded product in which a spherical surface is divided into four parts, and a drum fitting portion a which is fitted to the outer circumference of the lower hoop of the drum is molded on the upper edge thereof.

FIG. 8 shows a state in which the drum sound reflector A is attached to the snare drum 1. The reflector A has a drum fitting portion a at its upper edge fitted to the outer circumference of the lower hoop 2 of the drum 1. And a flat fastener (velvet fastener generally called a magic tape) b which is adhered to the inner peripheral surface of the drum fitting portion a and the outer peripheral surface of the lower hoop 2, respectively. Mounted on.

If the reflector A is attached to the lower side of the drum 1, the drum sound is reflected by the inner peripheral surface of the reflector A and goes forward through the opening on the front surface of the reflector A. Can reach far ahead.

[Problems to be Solved by the Invention]

However, since the above-mentioned 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 it from the drum 1 when not in use, and it is troublesome to carry it. In addition, since the diameter of the drum fitting portion a of the reflector A is fixed, even the same kind of drum cannot be used for the drums having different diameters. Therefore, the reflector A having a size corresponding to the diameter of each drum is used. Had to manufacture. Further, 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 as shown by arrows in FIG. Since it is diffused widely in the direction, there is a problem that the direction of the reflected sound has no directivity and the reachability of the drum sound is not sufficient.

The present invention has been made in view of the above circumstances, and its object is to save space and be easy to transport, and can also be used for drums having different diameters, It is an object of the present invention to provide a drum sound reflector capable of providing directivity in the direction of sound and obtaining sufficient distance reachability.

[Means for Solving the Problems]

The drum sound reflector of the present invention comprises an upper edge of a sound reflection plate which is made of a flat flexible synthetic resin plate whose upper edge has an arc shape and which is curved in an inverted semi-conical shape with the upper edge as a base. A plurality of drum mounting brackets detachably mounted on the peripheral edge of the lower end of the drum are provided at appropriate intervals.

[Action]

That is, in the drum sound reflector of the present invention, the sound reflection plate is curved in an inverted semi-conical shape with the upper edge as the bottom side, and a plurality of drum mounting brackets provided at appropriate intervals are provided on the upper edge of the sound reflection plate. It is attached to the lower side of the drum by attaching it to the lower edge of the drum, and the inner peripheral surface of the sound reflection plate curved in an inverted semi-conical shape serves as a sound reflection surface that reflects the drum sound forward. The drum sound is reflected forward.

And in this drum sound reflector, since the sound reflector is a flat plate, the whole reflector becomes flat when it is removed from the drum, so it does not take up much space for storage.
Further, since it is easy to carry and the sound reflecting plate can be bent to have an arbitrary curvature, it can be used also for drums having different diameters. Furthermore, in this drum sound reflector, since the sound reflection surface formed by bending the sound reflection plate is an inverted semi-conical surface, the inclined surface from the bottom to the top of this inverted semi-conical surface is a substantially straight surface. Therefore, the reflection angle of the drum sound reflected by the sound reflection plate in the up-down direction is substantially uniform, so that directivity can be provided in the direction of the reflected sound to obtain sufficient distance reachability.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

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

The drum sound reflector of this embodiment includes a sound reflection plate 3 made of a flat flexible synthetic resin plate, and a plurality of (4 in the figure) for mounting the sound reflection plate 3 on the peripheral edge of the lower end portion of the drum. It consists of a drum mounting bracket 4. The sound reflector 3 is
Flexible synthetic resin plate (vinyl chloride plate, AB
This sound reflection plate 3 is made by cutting S resin plate, etc.) into two inverted conical bodies whose bottom surface diameter is almost the same as that of the drum and whose peripheral side surface has an inclination angle of about 45 °. The circumferential surface of the vertically-divided inverted half cone is developed, and the upper edge is formed in a fan shape having an arc shape. The sound reflection plate 3 is curved in the shape of an inverted semi-cone with the upper edge as the bottom by bending the arc-shaped upper edge along the bottom edge of the inverted semi-cone as shown by the chain line in FIG. , In this state, the drum mounting bracket 4
It is attached to the underside of the drum.

The drum mounting member 4 is detachably attached to the lower hoop of the drum.
Are provided at both ends of the upper edge of the sound reflection plate 3 and at two locations in the center of the upper edge, and are provided at equal intervals. As shown in FIG. 3, the drum mounting member 4 is bent at a substantially right angle from the hoop contact portion 5a that contacts the outer surface of the lower hoop 2 of the drum, and is bent at a substantially right angle from the hoop contact portion 5a. A lower hoop is provided between an L-shaped hoop receiver 5 including a rising portion 5b facing away from the upper end and a hoop contact portion 5a of the hoop receiver 5 that abuts on an inner surface of the lower hoop 2. It is composed of a hoop retainer 6 for holding 2 and a bolt 7 and a wing nut 8 for pressing the hoop retainer 6 against the inner surface of the lower hoop 2. The other end of the rigid arm plate 9 having one end riveted to the outer surface of the contact portion 5a is riveted to the upper edge of the sound reflection plate 3 and attached to the sound reflection plate 3. Further, the hoop retainer 6 is provided such that its base end is held in a long hole 10 provided in the rising portion 5b of the hoop receiver 5 so as to be 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 retainer 6 with a non-rotating fit, 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 is in contact with the outer surface of the hoop contact portion 5a of the hoop receiver 5 via the arm plate 9 is screwed into the end of the. Also, 11 is the bolt 7
Is a coil spring interposed between the hoop retainer 6 and the hoop retainer 5 by being loosely fitted to the hoop retainer 6, and the hoop retainer 6 includes a wing nut 8
Is pressed against the inner surface of the lower hoop 2 to clamp the lower hoop 2 between it and the hoop contact portion 5a of the hoop receiver 5, and the wing nut 8 is loosened to loosen the spring of the coil spring 11. It is separated from the inner surface of the lower hoop 2 by force.

FIG. 4 shows a state in which the drum sound reflector is attached to the snare drum 1, and the reflector reflects sound by bending the upper edge of the sound reflecting plate 3 along the lower edge of the drum 1. The plate 3 is bent in an inverted semi-conical shape with the upper edge as the base, and the drum mounting member 4 provided on the upper edge of the sound reflecting plate 3 is attached to the lower edge of the drum 1, that is, the lower hoop 2.
Is attached to the lower side of the drum 1. As described above, when the drum sound reflector is attached to the lower side of the drum 1 with the sound reflection plate 3 curved in the shape of an inverted semi-cone, the inner peripheral surface of the sound reflection plate 3 curved in the shape of an inverted semi-cone. Serves as a sound reflecting surface for reflecting the drum sound forward, and the drum sound is reflected forward as indicated by the arrow in FIG. In addition, the inclination angle of the sound anti-slope formed by bending the sound reflection plate into an inverted semi-conical shape (the angle of the inclined surface from the bottom to the top of the inverse semi-conical surface) is approximately 45 °, and The drum sound emitted directly below is reflected in a substantially horizontal direction by the sound reflection surface.

In the drum sound reflector, since the sound reflector 3 is originally a flat plate, the whole reflector becomes flat as shown in FIG. It does not take up space and is easy to transport. Moreover, in the drum sound reflector, since the sound reflection plate 3 can be curved to have an arbitrary curvature, it can also be used for drums having different diameters. Further, in this drum sound reflector, since the sound reflecting surface formed by bending the sound reflecting plate 3 is an inverted semi-conical surface, the inclined surface from the bottom to the top of the inverse semi-conical surface is almost straight. (However, the inclined surface near the sound outlet, that is, the inclined surfaces near both side edges of the sound reflection plate 3 is a curved surface that expands to the outside to some extent.) Therefore, in the vertical direction of the drum sound reflected by the sound reflection plate 3. Since the reflection angle is substantially uniform, it is possible to obtain directivity in the direction of the reflected sound and obtain sufficient distance.

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

5 and 6 show another embodiment of the present invention. In the drum sound reflector of this embodiment, the sound reflecting plate 3 is arranged in the fifth position.
It has a shape as shown in the figure, and this drum sound reflector is also attached to the drum 1 as shown in FIG.

Further, in the above embodiment, the drum sound reflector used for the snare drum 1 has been described, but the present invention is also applicable to the drum sound reflectors for tom toms and tenor drums.
It can also be applied to a single head tom drum sound reflector having a drum head only on the upper side. The drum sound reflector used for the single head tom is attached to the single head tom by sandwiching the peripheral edge of the lower end portion of the drum body with the drum mounting member 4 provided on the upper edge of the sound reflecting plate 3. Also, there are two types of single-head toms: one with the lower end of the drum barrel shaped like a cylinder, and one with a sonic cut type that cuts the front side of the lower end of the drum barrel diagonally to improve sound output. However, the drum sound reflector of the present invention can be used for either of them.

Further, in the above-described embodiment, the drum mounting member 4 provided on the upper edge of the sound reflection plate 3 sandwiches the lower end peripheral edge of the drum (the hoop 2 or the lower end peripheral edge of the drum barrel). Any structure may be used as long as it is detachably attached to the peripheral edge of the lower end portion of the drum.

〔The invention's effect〕

The drum sound reflector of the present invention comprises an upper edge of a sound reflection plate which is made of a flat flexible synthetic resin plate whose upper edge has an arc shape and which is curved in an inverted semi-conical shape with the upper edge as a base. Since multiple drum mounting brackets that can be removably mounted on the peripheral edge of the lower end of the drum are provided at appropriate intervals, it does not take up much space for storage and is easy to transport, and it can also be used for drums of different diameters. By providing the direction of the reflected sound with directivity, sufficient reachability can be obtained.

[Brief description of drawings]

1 to 4 show one embodiment of the present invention. FIGS. 1 and 2 are front and plan views of a drum sound reflector, and FIG. 3 is III-III of FIG. FIG. 4 is an enlarged sectional view taken along the line, and FIG. 4 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. 7 and 8 are a perspective view of a conventional drum sound reflector and a perspective view of a drum mounted state. 4 ... Sound reflector, 5 ... Drum mounting bracket.

Claims (1)

[Claims] 1. A drum sound reflector mounted on a lower side of a drum for reflecting a drum sound forward, wherein the upper edge is made of a flat flexible synthetic resin plate having an arc shape. A drum sound reflector characterized in that a plurality of drum mounting brackets detachably attached to the peripheral edge of the lower end portion of the drum are provided at appropriate intervals on the upper edge of the sound reflecting plate curved in the shape of an inverted semi-cone, which is the bottom side. vessel.