Patent Description:
A known technology is to support a percussion instrument on a rod by fixing the rod to a bracket provided on the outer surface of a housing. For example, Patent Document <NUM> describes a drum bracket <NUM> capable of fixing a large diameter support rod <NUM> and a small diameter support rod <NUM> (rod) extending in a horizontal direction and a vertical direction. According to this technology, a percussion instrument may be supported on support rods <NUM> and <NUM> having different diameters and insertion directions.

[Patent Document <NUM>] Japanese Patent Application Laid-Open (<CIT> (e.g., paragraph <NUM> and <FIG>).

However, the above-mentioned conventional technology has a problem in that it has low versatility because it can only fix rods of one diameter to the bracket in both the horizontal direction and vertical direction.

The disclosure has been made to solve the above-mentioned problem and has an object to provide a percussion instrument and a rod tightening method that may improve versatility.

In order to achieve the above-mentioned purpose, the percussion instrument of the disclosure, which is supportable on a first rod and a second rod having a smaller diameter than the first rod, includes: a housing; a bracket, provided on an outer surface of the housing; a tightening bolt, tightened toward a cavity inside the bracket; and a tightening portion, elastically deformed or performing sliding displacement inside the bracket by a tightening force of the tightening bolt. The bracket includes a first insertion hole into which the first rod is insertable and a second insertion hole into which the second rod is insertable in a direction the same as an insertion direction of the first rod into the first insertion hole. The tightening portion is at least configured by a first tightening portion capable of tightening the first rod inserted into the first insertion hole and a second tightening portion capable of tightening the second rod inserted into the second insertion hole.

The rod tightening method of the disclosure is a method for tightening a rod in a percussion instrument, which is supportable on a first rod and a second rod having a smaller diameter than the first rod, and the percussion instrument includes: a housing; a bracket, provided on an outer surface of the housing; a tightening bolt, tightened toward a cavity inside the bracket; and a tightening portion, elastically deformed or performing sliding displacement inside the bracket by a tightening force of the tightening bolt. The bracket includes a first insertion hole into which the first rod is insertable and a second insertion hole into which the second rod is insertable in a direction the same as an insertion direction of the first rod into the first insertion hole. The tightening portion is at least configured by a first tightening portion and a second tightening portion, and the first rod inserted into the first insertion hole is tightened by the first tightening portion, while the second rod inserted into the second insertion hole is tightened by the second tightening portion.

Preferred embodiments of the disclosure will be described below with reference to the drawings. First, the overall configuration of the percussion instrument <NUM> of the first embodiment will be described with reference to <FIG>, <FIG>, and <FIG>. <FIG> is a perspective view of the percussion instrument <NUM> of the first embodiment, and <FIG> is a partially enlarged perspective view of the percussion instrument <NUM>. <FIG> is an exploded perspective view of the percussion instrument <NUM>.

As shown in <FIG> and <FIG>, the percussion instrument <NUM> is an electronic percussion instrument that mimics an acoustic drum. The percussion instrument <NUM> includes a bottom frame <NUM> having a substantially disc shape that forms the bottom surface of the percussion instrument <NUM>, and a top frame <NUM> that overlaps the bottom frame <NUM> and forms the outer circumferential surface of the percussion instrument <NUM> (housing) together with the bottom frame <NUM>. Although not shown in the drawings, the top frame <NUM> is formed in a cylindrical shape, and the opening part on the upper end side of the top frame <NUM> is covered with a film-like head <NUM>.

The head <NUM> is formed in a disc shape using a mesh made of woven synthetic fibers, and is attached to the percussion instrument <NUM> by a hoop <NUM> having an annular shape. The hoop <NUM> has through holes (not shown) formed at a plurality of positions in the circumferential direction of the hoop <NUM>, and tension bolts <NUM> are inserted into these through holes. A plurality of lugs <NUM> are provided on the outer circumferential surface of the bottom frame <NUM>, and tension is applied to the head <NUM> by tightening (screwing) the tension bolts <NUM> into the lugs <NUM> with the outer edge of the head <NUM> hooked onto the hoop <NUM>.

A head sensor (not shown) that comes into contact with the lower surface of the head <NUM> is attached to the inner circumferential side of the top frame <NUM> (inside the housing formed by the bottom frame <NUM> and top frame <NUM>), and when the head sensor detects vibrations when the head <NUM> (hitting surface) is hit, a musical tone signal based on the detection result is generated by a sound source (not shown). This musical tone signal is output to an amplifier and a speaker (neither of which are shown), and electronic musical tones are emitted from the speaker.

A reinforcement frame <NUM> formed in an annular shape using a metal plate is sandwiched between the bottom frame <NUM> and the top frame <NUM>, and the reinforcement frame <NUM> is integrally formed with a protrusion 8a that protrudes toward the outer circumferential side of the bottom frame <NUM> and the top frame <NUM>.

A bracket <NUM> is fixed (screwed) to the lower surface of the protrusion 8a by two fixing bolts <NUM> arranged in the circumferential direction. An outer circumferential wall <NUM> forming the outer circumferential surface of the bracket <NUM> has a circular insertion hole 11a for inserting a horizontal rod 100a and a polygonal (regular hexagonal in this embodiment) insertion hole 11b for inserting a horizontal rod 100b having a smaller diameter than the horizontal rod 100a formed in line in the up and down direction.

The horizontal rod 100a has a circular cross-sectional shape, and the horizontal rod 100b has a polygonal (regular hexagonal) cross-sectional shape. The diameter of the horizontal rod 100b (the diameter of a circle circumscribing the polygonal horizontal rod 100b) is formed to be smaller than the diameter of the horizontal rod 100a. Similarly, the diameter of the insertion hole 11b (the diameter of a circle circumscribing each vertex of the polygonal insertion hole 11b) is formed to be smaller than the diameter of the insertion hole 11a.

An insertion hole 8b penetrating through upward and downward is formed in the protrusion 8a of the reinforcement frame <NUM>, and this insertion hole 8b is a hole for inserting a vertical rod 100c (see <FIG>) extending in the vertical direction.

These horizontal rods 100a and 100b and vertical rod 100c are all rods that form a part of a drum set (drum stand) and support the percussion instrument <NUM>. Depending on the type of drum set supporting the percussion instrument <NUM>, either a horizontal rod 100a, a horizontal rod 100b, or a vertical rod 100c is (selectively) fixed to the bracket <NUM>.

Each of the rods 100a to 100c is fixed to the bracket <NUM> by a tightening bolt <NUM>. The tightening bolt <NUM> is tightened to the bracket <NUM> in a horizontal direction perpendicular to the insertion direction of the horizontal rod 100b into the insertion hole 11b and the insertion direction of the vertical rod 100c into the insertion hole 8b (hereinafter referred to as "the tightening direction of the tightening bolt <NUM>.

As shown in <FIG>, <FIG>, and <FIG>, the bracket <NUM> includes a bottom wall <NUM> (see <FIG>) extending from a lower end of the outer circumferential wall <NUM> to the bottom frame <NUM> side (an inner circumferential side of the percussion instrument <NUM>), and a pair of side walls <NUM> rise upward from two ends of the bottom wall <NUM> in the tightening direction of the tightening bolt <NUM>. A pair of side walls <NUM> are connected by an inner circumferential wall <NUM> in the tightening direction of the tightening bolt <NUM>, and each wall <NUM> to <NUM> of the bracket <NUM> is integrally formed by using a metal.

In the bracket <NUM>, a cavity S surrounded by the walls <NUM> to <NUM> is formed, and a first tightening member <NUM> and a second tightening member <NUM> are housed in the cavity S through an opening part in the upper side. The bracket <NUM> with each of the tightening members <NUM>, <NUM> housed therein is screwed to the protrusion 8a of the reinforcement frame <NUM> using the fixing bolts <NUM> (see <FIG> and <FIG>), so that the bracket <NUM> and each of the tightening members <NUM>, <NUM> are assembled to the percussion instrument <NUM>.

The first tightening member <NUM> is a resin part for tightening the horizontal rod 100a (see <FIG>), and the second tightening member <NUM> is a metal part for tightening the horizontal rod 100b (see <FIG>).

The first tightening member <NUM> includes a cylindrical first tightening portion <NUM> having an inner circumferential surface 31a with a circular cross section, and an annular portion <NUM> is integrally formed on an end surface of the first tightening portion <NUM> in the axial direction. The annular portion <NUM> is a protrusion of an annular shape having the same inner diameter as the inner circumferential surface 31a of the first tightening portion <NUM>, and the outer diameter of the annular portion <NUM> is formed to be the same as (or slightly smaller than) the inner diameter of the insertion hole 11a. When the annular portion <NUM> is fitted into the insertion hole 11a of the bracket <NUM>, the inner circumferential surface 31a of the first tightening portion <NUM> communicates with the insertion hole 11a.

Thus, when the horizontal rod 100a is inserted through the insertion hole 11a, the horizontal rod 100a is held by the inner circumferential surface 31a of the first tightening portion <NUM>. Although not shown in the drawings, the insertion of the horizontal rod 100a toward the inner circumferential surface 31a of the first tightening portion <NUM> is stopped by contact with a regulating wall 2b of the bottom frame <NUM> (see <FIG>).

First, the structure for tightening the horizontal rod 100a with the first tightening portion <NUM> will be described with reference to <FIG>, <FIG>, and <FIG>. <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM>, and <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> showing a state in which the horizontal rod 100a is tightened by the first tightening portion <NUM>. In addition, <FIG> and <FIG> shows a cross section cut along a plane perpendicular to the insertion direction of the horizontal rod 100a, which shows a cross section including a protrusion <NUM> located on the insertion hole 11a side among the pair of protrusions <NUM> (see <FIG>) of the first tightening member <NUM>.

As shown in <FIG>, <FIG>, and <FIG>, a slit 31b is formed in the lower end portion of the first tightening portion <NUM>, partially dividing the first tightening portion <NUM> in a circumferential direction (the direction around the inner circumferential surface 31a). The slit 31b is a crack extending across two ends in the axial direction of the inner circumferential surface 31a of the first tightening portion <NUM>, and one end of the slit 31b in the longitudinal direction (the end on the insertion hole 11a side) is connected to a slit 32a (see <FIG>). The slit 32a is formed by cutting out the base part of the annular portion <NUM> (the part connected to the first tightening portion <NUM>) over approximately half the circumference. The formation of these slits 31b and 32a enables the first tightening portion <NUM> formed in a substantially C-shape to be elastically deformed (deformed to narrow the width of the slit 31b).

A side surface 31c of the first tightening portion <NUM> facing the tightening bolt <NUM> side (left side in <FIG> and <FIG>) is formed in an arc shape corresponding to the inner circumferential surface 31a of the first tightening portion <NUM> (centered on the central axis of the inner circumferential surface 31a), and the protrusion <NUM> is integrally formed at the lower end portion (near the slit 31b) of the side surface 31c of the first tightening portion <NUM>.

A recessed portion <NUM> (see <FIG> and <FIG>) is formed at the connection between the base of the protrusion <NUM> and the side surface 31c of the first tightening portion <NUM>, and the recessed portion <NUM> is formed in a groove shape extending across two ends of the protrusion <NUM> in the insertion direction of the horizontal rod 100a (the direction perpendicular to the paper surface of <FIG> and <FIG>). The bottom surface of the recessed portion <NUM> (the surface facing the tightening bolt <NUM>) is curved to be projecting toward the opposite side to the tightening bolt <NUM> (the right side in <FIG> and <FIG>), and a projecting portion <NUM> of the second tightening member <NUM> is fitted into this recessed portion <NUM>. The projecting portion <NUM> has a curved shape along the recessed portion <NUM> (projecting toward the recessed portion <NUM> side).

Each of the tightening members <NUM> and <NUM> is housed in the cavity S of the bracket <NUM> with the projecting portion <NUM> fitted into the recessed portion <NUM>. In this housed state, the displacement of the first tightening member <NUM> in each direction is regulated by the bottom frame <NUM> and the bracket <NUM>.

Specifically, the displacement of the first tightening member <NUM> in the insertion direction of the horizontal rod 100a (the direction perpendicular to the paper surface of <FIG> and <FIG>) is regulated by the outer circumferential wall <NUM> of the bracket <NUM> (see <FIG>) and the above-mentioned regulating wall 2b of the bottom frame <NUM> (see <FIG>).

In addition, a leg portion <NUM> is integrally formed on a side surface 31d of the first tightening portion <NUM> facing the opposite side to the tightening bolt <NUM> (the right side in <FIG> and <FIG>) and is continuing to the side surface 31d, and the leg portion <NUM> protrudes downward from the slit 31b and is supported by the bottom wall <NUM> of the bracket <NUM>. The bottom frame <NUM> also includes a protrusion 2a sandwiched between the reinforcement frame <NUM> (protrusion 8a) and the bracket <NUM>, and the first tightening member <NUM> is covered from above by this protrusion 2a. Thus, the up and down displacement of the first tightening member <NUM> is regulated by the protrusion 2a of the bottom frame <NUM> and the bottom wall <NUM> of the bracket <NUM>.

A female screw hole 13a (see <FIG>) is formed in the side wall <NUM> of the pair of side walls <NUM> of the bracket <NUM> on the opposite side from the leg portion <NUM>, and a shaft portion <NUM> of the tightening bolt <NUM> is tightened to this female screw hole 13a. Since the second tightening member <NUM> is provided on the tip side of the shaft portion <NUM> of this tightening bolt <NUM>, the tightening force when the tightening bolt <NUM> is tightened acts on the second tightening member <NUM>.

Due to the tightening force of the tightening bolt <NUM>, the second tightening member <NUM> undergoes sliding displacement along the tightening direction of the tightening bolt <NUM>, and as a result of this sliding displacement, the protrusion <NUM> (recessed portion <NUM>) of the first tightening member <NUM> is pushed into the projecting portion <NUM> of the second tightening member <NUM> (see <FIG>). As the protrusion <NUM> of the first tightening member <NUM> is pushed in, the first tightening portion <NUM> is elastically deformed so as to reduce the diameter of the inner circumferential surface 31a thereof (to narrow the width of the slit 31b), and the horizontal rod 100a is tightened. As a result, the horizontal rod 100a is fixed to the bracket <NUM>.

Next, a configuration for tightening the horizontal rod 100b and the vertical rod 100c will be described with reference to <FIG> and <FIG> and <FIG>. <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> showing a state in which the horizontal rod 100b is tightened by the second tightening portion <NUM> of the second tightening member <NUM>, and <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> showing a state in which the vertical rod 100c is tightened by the second tightening portion <NUM> of the second tightening member <NUM>. It is noted that <FIG> corresponds to a cross section taken along line IVb-IVb in <FIG>. First, a configuration for tightening the horizontal rod 100b will be described with reference to <FIG> and <FIG>.

As shown in <FIG> and <FIG>, an insertion hole 14a is formed in the inner circumferential wall <NUM> of the bracket <NUM>, and this insertion hole 14a faces the insertion hole 11b (see <FIG>) in the insertion direction of the horizontal rod 100b. Further, the protrusion <NUM> and the leg portion <NUM> of the first tightening member <NUM> are formed on two sides of the insertion hole 14a (positions avoiding the insertion hole 14a) when viewed in the insertion direction of the horizontal rod 100b (see <FIG>). Thus, the horizontal rod 100b inserted from the insertion hole 11b (see <FIG>) passes between the protrusion <NUM> and the leg portion <NUM> of the first tightening member <NUM> and is inserted into the insertion hole 14a.

A pair of protrusions <NUM> are formed (see <FIG>) in line in the insertion direction of the horizontal rod 100a (the direction perpendicular to the paper surface of <FIG>), and the second tightening portion <NUM> of the second tightening member <NUM> is inserted between the pair of protrusions <NUM>. The second tightening portion <NUM> is a protrusion formed integrally with the projecting portion <NUM> of the second tightening member <NUM>, and the second tightening portion <NUM> is formed in a substantially central part of the projecting portion <NUM> in the insertion direction of the horizontal rod 100a (see <FIG>).

A groove 42a for tightening the horizontal rod 100b is formed at the tip of the second tightening portion <NUM> (the right end portion in <FIG>). The groove 42a is formed in a V-shape recessed in a direction away from the central axis of the insertion hole 14a when viewed in the insertion direction of the horizontal rod 100b.

The groove 42a is formed at a position that protrudes further toward the center side of the insertion hole 14a than the protrusion <NUM> when viewed in the insertion direction of the horizontal rod 100b (see <FIG>). Thus, by tightening the tightening bolt <NUM> with the horizontal rod 100b inserted into the insertion hole 14a, the groove 42a of the second tightening portion <NUM> pushes the horizontal rod 100b against the inner circumferential surface of the insertion hole 14a. At this time, although not shown in the drawings, the horizontal rod 100b is also pushed against the inner circumferential surface of the insertion hole 11b (see <FIG>). That is, the horizontal rod 100b is fixed to the bracket <NUM> by being sandwiched between the groove 42a of the second tightening portion <NUM> and the insertion holes 11b and 14a.

Next, a configuration for tightening the vertical rod 100c will be described with reference to <FIG> and <FIG>. An insertion hole 12a for inserting the vertical rod 100c is formed in the bottom wall <NUM> of the bracket <NUM> (see <FIG>), and a pair of through holes 31e and 31f are formed at positions overlapping the insertion hole 12a in the up and down direction in the first tightening portion <NUM> of the first tightening member <NUM>. The through hole 31e is a hole that connects the lower surface of the first tightening portion <NUM> to the inner circumferential surface 31a, and the through hole 31f is a hole that connects the upper surface of the first tightening portion <NUM> to the inner circumferential surface 31a.

It is noted that, although not shown in the drawings, a through hole 2c is also formed in the protrusion 2a of the bottom frame <NUM> that covers the first tightening portion <NUM> from above (see <FIG>). Thus, the vertical rod 100c (see <FIG>) inserted from below the insertion hole 12a is inserted into the insertion hole 8b of the reinforcement frame <NUM> through the through holes 31e and 31f (see <FIG>) of the first tightening member <NUM>. The inserted state of the vertical rod 100c is also fixed by the second tightening member <NUM>.

A groove 42b for tightening the vertical rod 100c is formed at the tip of the second tightening portion <NUM> of the second tightening member <NUM>. The groove 42b is formed in a V-shape recessed in a direction away from the central axis of the insertion hole 12a when viewed in the insertion direction of the vertical rod 100c (see <FIG>). It is noted that, the depth of the groove 42b from the tip of second tightening portion <NUM> is formed deeper than the groove 42a (see <FIG>), and a pair of grooves 42a are formed on two sides of the groove 42b (separated from each other in the insertion direction of the horizontal rod 100b).

The groove 42b of the second tightening portion <NUM> is formed at a position that protrudes further toward the center side of the insertion hole 12a than the through hole 31e of the first tightening portion <NUM> when viewed in the insertion direction of the vertical rod 100c (see <FIG>). Thus, by tightening the tightening bolt <NUM> with the vertical rod 100c inserted into each of the insertion holes 8b and 12a (through holes 31e and 31f), the groove 42b of the second tightening portion <NUM> pushes the vertical rod 100c against the inner circumferential surface of the insertion hole 12a. At this time, although not shown in the drawings, the vertical rod 100c is also pushed against the inner circumferential surface of the insertion hole 8b (see <FIG>). That is, the vertical rod 100c is fixed to the bracket <NUM> by being sandwiched between the groove 42b of the second tightening portion <NUM> and the insertion holes 8b and 12a.

In this way, in this embodiment, the horizontal rod 100a inserted into the insertion hole 11a (first tightening portion <NUM>) is capable to be tightened by the first tightening portion <NUM> of the first tightening member <NUM> (see <FIG>), and the horizontal rod 100b inserted into the insertion holes 11b and 14a is capable to be tightened by the second tightening portion <NUM> (groove 42a) of the second tightening member <NUM> (see <FIG>). As a result, the percussion instrument <NUM> may be supported by two horizontal rods 100a and 100b that extend in the same direction (horizontal direction) and have different diameters, thereby improving versatility.

Furthermore, the vertical rod 100c extending in a direction different from the horizontal rods 100a and 100b may also be tightened by the groove 42b of the second tightening portion <NUM>. Thus, the versatility of the percussion instrument <NUM> may be further improved.

In addition, since the horizontal rod 100a is tightened by utilizing the elastic deformation of the first tightening portion <NUM>, by loosening the tightening bolt <NUM>, the elastic restoring force of the first tightening portion <NUM> may be utilized to return each of the tightening members <NUM> and <NUM> to their initial positions (the state before the tightening bolt <NUM> is tightened). Thus, the tightening portions <NUM> and <NUM> may be suppressed from interfering with (getting caught on) the insertion of each of the rods 100a to 100c, thereby improving the workability when the percussion instrument <NUM> is supported by the rods 100a to 100c.

Here, a configuration in which a second tightening portion <NUM> is integrally formed with a tightening member <NUM> may also be adopted, as in the second embodiment described later (see <FIG> and <FIG>). However, in this configuration, when the second tightening portion <NUM> is pushed in by the tightening bolt <NUM>, the first tightening portion <NUM> is deformed such that the second tightening portion <NUM> rotates with the upper end portion of the first tightening portion <NUM> being the center. Thus, the second tightening portion <NUM> is not able to be displaced along the tightening direction of the tightening bolt <NUM>.

In contrast, in this embodiment, the first tightening member <NUM> having the first tightening portion <NUM> and the second tightening member <NUM> having the second tightening portion <NUM> are separate parts, and in this configuration, the first tightening portion <NUM> is elastically deformed by utilizing the sliding displacement of the second tightening member <NUM> caused by the tightening force of the tightening bolt <NUM>.

With this configuration, unlike the case where the second tightening portion <NUM> is integrally formed with the tightening member <NUM> as in the above-mentioned second embodiment, the second tightening portion <NUM> may be suppressed from accompanying the elastic deformation of the first tightening portion <NUM>. As a result, the second tightening portion <NUM> (second tightening member <NUM>) becomes more easily displaced along the tightening direction of the tightening bolt <NUM>, so that the tightening force of the tightening bolt <NUM> is more easily transmitted to the horizontal rod 100b and the vertical rod 100c. Thus, each of the rods 100b and 100c may be firmly fixed to the bracket <NUM>.

In addition, since the grooves 42a and 42b of the second tightening portion <NUM> are formed at positions overlapping the shaft portion <NUM> of the tightening bolt <NUM> in the tightening direction of the tightening bolt <NUM>, the tightening force of the tightening bolt <NUM> is easily transmitted to the horizontal rod 100b and the vertical rod 100c. Thus, each of the rods 100b and 100c may be firmly fixed to the bracket <NUM>.

In addition, the protrusion <NUM> protrudes from the outer circumferential surface (near the slit 31b) of the first tightening portion <NUM>, and since the protrusion <NUM> formed on the displacement locus of the second tightening member <NUM> is pushed in by the second tightening member <NUM>, the first tightening portion <NUM> is more easily elastically deformed. This is because, when the first tightening portion <NUM> is elastically deformed starting from the upper end portion thereof, the first tightening portion <NUM> may be pushed in at a position away from the starting point of the elastic deformation.

In addition, a pair of protrusions <NUM> are formed in line in the insertion direction of the horizontal rod 100b (horizontal rod 100a), and the second tightening portion <NUM> is configured to tighten the horizontal rod 100b with the second tightening portion <NUM> protruding from between the pair of protrusions <NUM>. As a result, the tightening position of the horizontal rod 100a by the first tightening portion <NUM> and the tightening position by the second tightening portion <NUM> may be brought closer to each other. Thus, the distance between the insertion holes 11a and 11b (see <FIG>) may be made small, and the bracket <NUM> may be made compact.

Here, in this embodiment, the leg portion <NUM> is formed extending downward from the first tightening portion <NUM>, and the second tightening portion <NUM> (grooves 42a and 42b) and the leg portion <NUM> face each other in the tightening direction of the tightening bolt <NUM>. Thus, for example, each of the rods 100b and 100c may be tightened by the second tightening portion <NUM> and the leg portion <NUM>. However, in such a configuration, since each of the rods 100b and 100c is tightened at one point (approximately one point) in the longitudinal direction, each of the rods 100b and 100c may not be firmly fixed to the bracket <NUM>.

In contrast, in this embodiment, the horizontal rod 100b is fixed to the bracket <NUM> by being sandwiched at multiple points between the groove 42a of the second tightening portion <NUM> and the edges of the two insertion holes 11b and 14a. Similarly, the vertical rod 100c is fixed to the bracket <NUM> by being sandwiched at multiple points between the groove 42b of the second tightening portion <NUM> and the edges of the two insertion holes 8b and 12a. In this way, by tightening each of the rods 100b and 100c at multiple points in the longitudinal direction, each of the rods 100b and 100c may be firmly fixed to the bracket <NUM>.

Next, the configuration of the second tightening member <NUM> will be further described with reference to <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> in part Va in <FIG>, and <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> in part Vb in <FIG>.

As shown in <FIG>, when the protrusion <NUM> is pushed in by the projecting portion <NUM> with the horizontal rod 100a inserted into the first tightening portion <NUM>, after the first tightening portion <NUM> is elastically deformed to a certain extent, the elastic deformation is regulated by contact with the horizontal rod 100a. That is, when the horizontal rod 100a is tightened by the first tightening portion <NUM>, the inner circumferential surface 31a of the first tightening portion <NUM> holds a substantially circular shape.

On the other hand, as shown in <FIG>, when the horizontal rod 100b is tightened by the second tightening portion <NUM>, the horizontal rod 100a is not present on the inner circumferential side of the first tightening portion <NUM>. Thus, when the protrusion <NUM> is pushed in by the projecting portion <NUM>, the first tightening portion <NUM> is easily deformed so as to be pushed up by the projecting portion <NUM>.

As a result, for example, as shown by the two-dot chain line in <FIG>, in the case where the contact area between the second tightening member <NUM> and the side surface 31c of the first tightening portion <NUM> is increased in the up and down direction, when the projecting portion <NUM> slides while pushing up the first tightening portion <NUM>, the side surface 31c of the first tightening portion <NUM> is likely to interfere with the upper edge of the second tightening member <NUM>. When this interference causes the second tightening member <NUM> to tilt (rotate counterclockwise in <FIG>), the second tightening portion <NUM> (groove 42a) is not able to appropriately tighten the horizontal rod 100b. A configuration for solving this problem will be described below.

The second tightening member <NUM> is formed with a projecting surface <NUM> forming the tip surface of the projecting portion <NUM>, a recessed surface <NUM> continuing to the upper edge of the projecting surface <NUM>, and a flank surface <NUM> continuing to the upper edge of the recessed surface <NUM>. The projecting surface <NUM> is formed in a projecting arc shape toward the recessed portion <NUM> side of the first tightening portion <NUM>, and the curvature of the projecting surface <NUM> is the same as that of the recessed portion <NUM>. Further, the recessed surface <NUM> is formed in a projecting arc shape in a direction away from the side surface 31c of the first tightening portion <NUM>, and the curvature of the recessed surface <NUM> is the same as that of the side surface 31c of the first tightening portion <NUM>.

Then, the flank surface <NUM> continuing to the upper edge of the recessed surface <NUM> is formed in an upwardly projecting arc shape, and by forming such a flank surface <NUM> on the upper end part of the second tightening member <NUM>, the contact area between the second tightening member <NUM> and the side surface 31c of the first tightening portion <NUM> may be reduced. More specifically, when a virtual circle V is drawn centered on the central axis O of the inner circumferential surface 31a of the first tightening portion <NUM>, the second tightening member <NUM> is in contact with the side surface 31c of the first tightening portion <NUM> below the center C of the line segment connecting the lower end of the virtual circle V (the center of the slit 31b in the circumferential direction of the inner circumferential surface 31a) and the central axis O.

As a result, the side surface 31c of the first tightening portion <NUM> is suppressed from interfering with the upper edge of the second tightening member <NUM> when the second tightening member <NUM> slides while pushing up the first tightening portion <NUM>. As a result, the second tightening portion <NUM> (groove 42a) is suppressed from being tilted, so that the horizontal rod 100b may be appropriately tightened. Thus, the horizontal rod 100b may be firmly fixed to the bracket <NUM>.

It is noted that in this embodiment, the flank surface <NUM> is formed to be continuous with the upper edge of the recessed surface <NUM>, but this is not necessarily limited thereto. For example, the recessed surface <NUM> may be omitted, and the flank surface <NUM> may be formed to be continuous with the upper edge of the projecting surface <NUM>. In this way, the side surface 31c of the first tightening portion <NUM> may also be suppressed from interfering with the upper edge of the second tightening member <NUM> when the second tightening member <NUM> slides while pushing up the first tightening portion <NUM>.

Next, the percussion instrument <NUM> of the second embodiment will be described with reference to <FIG>, <FIG>, <FIG>, and <FIG>. It is noted that the same parts as those in the above-mentioned first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

<FIG> is a perspective view of the tightening member <NUM> of the second embodiment, and <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> of the second embodiment. <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> showing a state in which the horizontal rod 100a is tightened by the first tightening portion <NUM>, and <FIG> is a partially enlarged cross-sectional view of the percussion instrument <NUM> showing a state in which the horizontal rod 100b is tightened by the groove 42a of the second tightening portion <NUM>. It is noted that <FIG>, <FIG>, and <FIG> show cross sections cut along a plane that includes the shaft portion <NUM> of the tightening bolt <NUM> and is perpendicular to the insertion direction of the horizontal rods 100a and 100b.

As shown in <FIG> and <FIG>, the tightening member <NUM> of the percussion instrument <NUM> of the second embodiment has the same configuration as the first tightening member <NUM> of the first embodiment, except for the point that the protrusions <NUM> (see <FIG>) are omitted and the point that the first tightening portion <NUM> and the second tightening portion <NUM> are integrally formed.

The second tightening portion <NUM> extends downward so as to be continuous with the side surface 31c of the first tightening portion <NUM>, and a recessed portion 242c into which the shaft portion <NUM> is fitted is formed on the side surface of the second tightening portion <NUM> facing the tightening bolt <NUM>. Thus, when the second tightening portion <NUM> is pushed in by the tightening force of the tightening bolt <NUM>, the first tightening portion <NUM> is elastically deformed so as to reduce the diameter of the inner circumferential surface 31a.

Thus, as shown in <FIG>, by tightening the tightening bolt <NUM> with the horizontal rod 100a inserted into the first tightening portion <NUM>, the horizontal rod 100a is tightened by the first tightening portion <NUM> which is elastically deformed along with the second tightening portion <NUM>.

As shown in <FIG>, when viewed in the insertion direction of the horizontal rod 100b, the second tightening portion <NUM> and the leg portion <NUM> face each other across the insertion hole 14a, and the groove 42a is formed on the side surface of the second tightening portion <NUM> facing the leg portion <NUM>. Thus, by tightening the tightening bolt <NUM> with the horizontal rod 100b inserted into the insertion hole 14a, the horizontal rod 100b is tightened by the groove 42a of the second tightening portion <NUM>.

Further, the through hole 31e for inserting the vertical rod 100c (see <FIG>) extends upward and downward so as to be continuous with the second tightening portion <NUM>. Thus, although not shown in the drawings, the vertical rod 100c inserted into the insertion hole 8b through the insertion hole 12a and the through holes 31e, 31f, and 2c is fixed to the bracket <NUM> by being sandwiched at multiple points between the second tightening portion <NUM> (the inner circumferential surface of the through hole 31e) and the edges of the two insertion holes 8b and 12a.

In this way, also in this embodiment, the horizontal rods 100a and 100b and the vertical rod 100c may be tightened by the first tightening portion <NUM> and the second tightening portion <NUM> of the tightening member <NUM>. As a result, the percussion instrument <NUM> may be supported by the two horizontal rods 100a and 100b that extend in the same direction (horizontal direction) and have different diameters, while the percussion instrument <NUM> may also be supported by the vertical rod 100c that extends in a direction different from that of the horizontal rods 100a and 100b. Thus, the versatility of the percussion instrument <NUM> may be improved.

Further, the tightening member <NUM> is integrally formed with the first tightening portion <NUM> for tightening the horizontal rod 100a and the second tightening portion <NUM> for tightening the horizontal rod 100b. As a result, the number of parts may be reduce compared to the above-mentioned first embodiment in which the first tightening member <NUM> (first tightening portion <NUM>) and the second tightening member <NUM> (second tightening portion <NUM>) are separate, and the work of assembling the bracket <NUM> and the tightening member <NUM> to the percussion instrument <NUM> may be facilitated.

It is noted that, although the horizontal rod 100b of this embodiment is formed into a columnar shape having a smaller diameter than the horizontal rod 100a, it is of course possible to tighten the polygonal horizontal rod 100b similar to the first embodiment using the second tightening portion <NUM> (groove 42a) (the same applies to the third to sixth embodiments described later).

Next, the bracket <NUM> of the third embodiment will be described with reference to <FIG>, <FIG>, <FIG>, and <FIG>. It is noted that the same parts as those in each of the above-mentioned embodiments are denoted by the same reference numerals, and the description thereof will be omitted. <FIG> is a perspective view of the back surface of the bracket <NUM> of the third embodiment, and <FIG> is a cross-sectional view of the bracket <NUM>. <FIG> is a cross-sectional view of the bracket <NUM> showing a state in which the horizontal rod 100a is tightened by the first tightening portion <NUM>, and <FIG> is a cross-sectional view of the bracket <NUM> showing a state in which the horizontal rod 100b is tightened by the second tightening portion <NUM>.

As shown in <FIG> and <FIG>, the bracket <NUM> of the third embodiment is formed in a box shape having an opening on the side of the housing (not shown) of the percussion instrument. More specifically, an outer circumferential wall <NUM> of the bracket <NUM> is provided with circular insertion holes 311a and 311b for inserting the horizontal rods 100a and 100b (see <FIG> and <FIG>). These insertion holes 311a and 311b are formed in line in the tightening direction of the tightening bolt <NUM> (the left and right direction in <FIG>).

A lower wall <NUM> extends from the lower end of the outer circumferential wall <NUM> toward the housing side of the percussion instrument (the front side of the direction perpendicular to the paper surface of <FIG> and <FIG>), and a pair of side walls <NUM> extend upward from two ends of the lower wall <NUM> in the tightening direction of the tightening bolt <NUM> (the left and right direction in <FIG>). The upper ends of the pair of side walls <NUM> are connected to each other by an upper wall <NUM>, and the lower wall <NUM> and the upper wall <NUM> are provided with insertion holes 312a and 314a for inserting the vertical rod 100c.

Each of the walls <NUM> to <NUM> of the bracket <NUM> are integrally formed using metal, and a substantially rectangular parallelepiped cavity S is formed in the bracket <NUM> and is surrounded by each of the walls <NUM> to <NUM>. In this cavity S, a first tightening member <NUM> and a second tightening member <NUM> are housed through an opening part formed on the housing side of the percussion instrument.

A pair of fastening portions <NUM> that protrude on two sides in the tightening direction of the tightening bolt <NUM> are integrally formed on the pair of side walls <NUM>, and by screwing this fastening portions <NUM> to the housing of the percussion instrument, the bracket <NUM> and each of the tightening members <NUM> and <NUM> are assembled to the housing of the percussion instrument.

The first tightening member <NUM> is a resin part for tightening the horizontal rod 100a, and the second tightening member <NUM> is a metal part for tightening the horizontal rod 100b and the vertical rod 100c.

The first tightening member <NUM> includes a first tightening portion <NUM> having an inner circumferential surface 331a with a circular cross section corresponding to the insertion hole 311a. Thus, when the horizontal rod 100a (see <FIG>) is inserted through the insertion hole 311a, the horizontal rod 100a is held by the inner circumferential surface 331a of the first tightening portion <NUM>. It is noted that, although not shown in the drawings, the insertion of the horizontal rod 100a toward the first tightening portion <NUM> is stopped when it comes into contact with the housing of the percussion instrument (not shown). First, the structure for tightening this horizontal rod 100a by the first tightening portion <NUM> will be described with reference to <FIG>, <FIG>, and <FIG>.

As shown in <FIG>, <FIG>, and <FIG>, a slit 331b is formed in the upper end portion of the first tightening portion <NUM>, partially dividing the first tightening portion <NUM> in a circumferential direction (the direction around the inner circumferential surface 331a). The slit 331b is a crack extending across two ends in the axial direction of the inner circumferential surface 331a of the first tightening portion <NUM>, and the formation of this slit 331b enables the first tightening portion <NUM> formed in a substantially C-shape to be elastically deformed (deformed to narrow the width of the slit 331b).

A side surface 331c of the first tightening portion <NUM> facing the tightening bolt <NUM> side is formed in an arc shape corresponding to the inner circumferential surface 331a of the first tightening portion <NUM> (centered on the central axis of the inner circumferential surface 331a). A partition wall <NUM> supporting the side surface 331c of the first tightening portion <NUM> rises upward from the lower wall <NUM> of the bracket <NUM>. A side surface 316a (see <FIG>) of the partition wall <NUM> facing the first tightening portion <NUM> side is a curved surface that runs along the side surface 331c of the first tightening portion <NUM>.

A recessed portion <NUM> is formed on the upper end side of the side surface 331c of the first tightening portion <NUM>. The recessed portion <NUM> is formed in a groove shape extending across two ends of the side surface 331c of the first tightening portion <NUM> in the insertion direction of the horizontal rod 100a (the direction perpendicular to the paper surface of <FIG>).

The recessed portion <NUM> has a curved shape that protrudes toward the opposite side to the tightening bolt <NUM> (the right side in <FIG>), and a projecting portion <NUM> of the second tightening member <NUM> that extends between the upper wall <NUM> and the partition wall <NUM> is fitted into this recessed portion <NUM>. The tip surface of the projecting portion <NUM> has a curved shape that runs along the recessed portion <NUM> (protrudes toward the recessed portion <NUM> side), and the second tightening portion <NUM> extending downward is integrally formed at the base end of the projecting portion <NUM> (the end portion on the tightening bolt <NUM> side).

A female screw hole 13a is formed in the side wall <NUM> of the bracket <NUM> facing the second tightening portion <NUM>, and a recessed portion 242c for inserting the shaft portion <NUM> of the tightening bolt <NUM> is formed on the side surface of the second tightening portion <NUM> facing the tightening bolt <NUM>. Thus, the second tightening member <NUM> slides toward the first tightening portion <NUM> side by pushing in the second tightening portion <NUM> by the tightening force of the tightening bolt <NUM>.

By sliding the second tightening member <NUM>, the recessed portion <NUM> is pushed in by the projecting portion <NUM>, and the first tightening portion <NUM> elastically deforms to reduce the diameter of the inner circumferential surface 331a (to narrow the width of the slit 331b) (see <FIG>). The horizontal rod 100a is tightened by the elastic deformation of this first tightening portion <NUM>, and the horizontal rod 100a is fixed to the bracket <NUM>.

Next, a configuration for tightening the horizontal rod 100b and the vertical rod 100c by the second tightening portion <NUM> will be described.

As shown in <FIG>, <FIG>, and <FIG>, the second tightening portion <NUM> and the partition wall <NUM> face each other across the insertion hole 311b, and a groove 42a is formed on the side surface of the second tightening portion <NUM> facing the partition wall <NUM>. Further, a groove 316b having a projecting arc shape is formed on the side surface of the partition wall <NUM> facing the second tightening portion <NUM>, opposite to the groove 42a. The groove 316b extends in the insertion direction of the horizontal rod 100b (the direction perpendicular to the paper surface of <FIG>) and is connected to the inner circumferential surface of the insertion hole 311b.

Thus, by tightening the tightening bolt <NUM> with the horizontal rod 100b inserted into the insertion hole 311b, the horizontal rod 100b is tightened by the insertion hole 311b, the groove 42a of the second tightening portion <NUM>, and the groove 316b of the partition wall <NUM>.

As shown in <FIG>, the second tightening member <NUM> and the partition wall <NUM> are formed with grooves <NUM> and 316c for passing the vertical rod 100c therethrough. The groove <NUM> extends upwardly and downwardly and is continuous with the insertion hole 312a of the lower wall <NUM> and the insertion hole 314a of the upper wall <NUM>. Further, the groove 316c of the partition wall <NUM> extends upwardly and downwardly and is continuous with the insertion hole 12a of the lower wall <NUM>.

Thus, although not shown in the drawings, the vertical rod 100c inserted into the insertion hole 314a through the insertion hole 312a and the grooves <NUM> and 316c is tightened by the insertion holes 312a and 314a and the grooves <NUM> and 316c.

In this way, also in this embodiment, the horizontal rods 100a and 100b and the vertical rod 100c may be tightened by the first tightening portion <NUM> and the second tightening portion <NUM> of each of the tightening members 330and <NUM>. As a result, the percussion instrument may be supported by the two horizontal rods 100a and 100b that extend in the same direction (horizontal direction) and have different diameters, while the percussion instrument may also be supported by the vertical rod 100c that extends in a direction different from that of the horizontal rods 100a and 100b. Thus, the versatility of the percussion instrument may be improved.

In addition, since the grooves 42a and <NUM> of the second tightening portion <NUM> are formed at positions overlapping the shaft portion <NUM> of the tightening bolt <NUM> in the tightening direction of the tightening bolt <NUM>(see <FIG>), the tightening force of the tightening bolt <NUM> is easily transmitted to the horizontal rod 100b and the vertical rod 100c. Thus, each of the rods 100b and 100c may be firmly fixed to the bracket <NUM>.

In addition, since the horizontal rod 100a is tightened by utilizing the elastic deformation of the first tightening portion <NUM>, by loosening the tightening bolt <NUM>, the elastic restoring force of the first tightening portion <NUM> may be utilized to return each of the tightening members <NUM> and <NUM> to their initial positions (the state before the tightening bolt <NUM> is tightened). Thus, the first tightening portion <NUM> and the second tightening portion <NUM> may be suppressed from interfering with (getting caught on) the insertion of the each of the rods 100a to 100c.

Further, the first tightening member <NUM> having the first tightening portion <NUM> and the second tightening member <NUM> having the second tightening portion <NUM> are separate parts, and in this configuration, the first tightening portion <NUM> is elastically deformed by the sliding displacement of the second tightening member <NUM>. Thus, unlike the case where the first tightening portion <NUM> and the second tightening portion <NUM> are integrally formed, the second tightening portion <NUM> may be suppressed from accompanying the elastic deformation of the first tightening portion <NUM>. As a result, the second tightening portion <NUM> (second tightening member <NUM>) becomes more easily displaced along the tightening direction of the tightening bolt <NUM>, so that the tightening force of the tightening bolt <NUM> is more easily transmitted to the horizontal rod 100b and the vertical rod 100c.

Next, the fourth embodiment will be described with reference to <FIG> and <FIG>. <FIG> is a cross-sectional view of the bracket <NUM> of the fourth embodiment, and <FIG> is a cross-sectional view of the bracket <NUM> showing a state in which the horizontal rods 100a and 100b are tightened by the first tightening portion <NUM> and the second tightening portion <NUM>. It is noted that <FIG> and <FIG> shows a cross section of the bracket <NUM> cut along a plane corresponding to that in <FIG>.

Further, although <FIG> shows a state in which each of the horizontal rods 100a and 100b are tightened by the first tightening portion <NUM> and the second tightening portion <NUM>, respectively, when the percussion instrument is actually supported on a drum set, either one of the rods is tightened by the first tightening portion <NUM> or the second tightening portion <NUM>.

As shown in <FIG>, the bracket <NUM> of the fourth embodiment has the same configuration as the bracket <NUM> of the third embodiment, except for the point that the partition wall <NUM> (see <FIG>) is omitted. Thus, similar to the bracket <NUM> of the third embodiment, the bracket <NUM> is formed with insertion holes 311a, 311b, 312a, and 314a for inserting each of the rods 100a to 100c therein.

The tightening member <NUM> is a resin part for tightening each of the rods 100a to 100c. The tightening member <NUM> includes a cylindrical first tightening portion <NUM> having an inner circumferential surface 431a with a circular cross section corresponding to the horizontal rod 100a (insertion hole 311a), and a slit 431b is formed in the lower end portion of the first tightening portion <NUM>, partially dividing the first tightening portion <NUM> in a circumferential direction (the direction around the inner circumferential surface 431a). The slit 431b is a crack extending across two ends in the axial direction of the inner circumferential surface 431a of the first tightening portion <NUM>, and the formation of this slit 431b enables the first tightening portion <NUM> formed in a substantially C-shape to be elastically deformed (deformed to narrow the width of the slit 431b).

The first tightening portion <NUM> is integrally formed with a second tightening portion <NUM> for tightening the horizontal rod 100b. The first tightening portion <NUM> and the second tightening portion <NUM> are both formed in a substantially rectangular parallelepiped shape, and the tightening member <NUM> is housed inside the bracket <NUM>.

When the tightening member <NUM> is housed in the bracket <NUM>, the shaft portion <NUM> of the tightening bolt <NUM> and the second tightening portion <NUM> face each other. A recessed portion 242c is formed on the side surface of the second tightening portion <NUM> facing the tightening bolt <NUM> side, and the tightening force of the tightening bolt <NUM> acts on the second tightening portion <NUM>. As a result, the entire tightening member <NUM> is elastically deformed so as to be compressed in the tightening direction of the tightening bolt <NUM>, thereby elastically deforming the cylindrical first tightening portion <NUM> so as to reduce the diameter of the inner circumferential surface 431a (to narrow the width of the slit 431b).

Thus, as shown in <FIG>, by tightening the tightening bolt <NUM> with the horizontal rod 100a inserted into the insertion hole 311a and the first tightening portion <NUM>, the horizontal rod 100a is tightened by the elastic deformation of the first tightening portion <NUM>.

It is noted that, in this embodiment, although the diameter of the inner circumferential surface 431a of the first tightening portion <NUM> is formed to be larger than the diameter of the insertion hole 311a, and the horizontal rod 100a is sandwiched between the insertion hole 311a and the inner circumferential surface 431a of the first tightening portion <NUM> by elastic deformation of the first tightening portion <NUM>, it is of course possible to form the inner circumferential surface 431a of the first tightening part <NUM> with a diameter smaller than the diameter of the insertion hole 311a.

Further, as shown in <FIG>, the second tightening portion <NUM> is formed with a through hole 442d, which is continuous with the insertion hole 311b (extending in the insertion direction of the horizontal rod 100b). Thus, when the tightening force of the tightening bolt <NUM> acts on the second tightening portion <NUM>, the second tightening portion <NUM> is elastically deformed so as to slightly narrow the through hole 442d, and in accordance with the elastic deformation of the first tightening portion <NUM>, the second tightening portion <NUM> performs sliding displacement.

Thus, by tightening the tightening bolt <NUM> with the horizontal rod 100b inserted into the insertion hole 311b, the horizontal rod 100b is tightened by being sandwiched between the insertion hole 311b and the through hole 442d of the second tightening portion <NUM>.

Further, in the second tightening portion <NUM>, a through hole 442e is formed at a position overlapping the insertion holes 312a and 314a in the up and down direction. Thus, although not shown in the drawings, the vertical rod 100c inserted into the insertion hole 314a through the insertion hole 312a and the through hole 442e is fixed to the bracket <NUM> by being tightened to the insertion holes 312a and 314a and the through hole 442e.

In this way, also in this embodiment, the horizontal rods 100a and 100b and the vertical rod 100c may be tightened by the first tightening portion <NUM> and the second tightening portion <NUM>. As a result, the percussion instrument may be supported by the two horizontal rods 100a and 100b that extend in the same direction (horizontal direction) and have different diameters, while the percussion instrument may also be supported by the vertical rod 100c that extends in a direction different from that of the horizontal rods 100a and 100b. Thus, the versatility of the percussion instrument may be improved.

Further, since the through hole 442d and the through hole 442e of the second tightening portion <NUM> are formed at positions overlapping the shaft portion <NUM> of the tightening bolt <NUM> in the tightening direction of the tightening bolt <NUM>, the tightening force of the tightening bolt <NUM> is easily transmitted to the horizontal rod 100b and the vertical rod 100c.

In addition, since the first tightening portion <NUM> and the second tightening portion <NUM> for tightening the horizontal rods 100a and 100b are integrally formed, the number of parts may be reduced, and the work of assembling the bracket <NUM> and the tightening member <NUM> to the percussion instrument is facilitated.

In addition, since the horizontal rod 100a is tightened by utilizing the elastic deformation of the first tightening portion <NUM>, by loosening the tightening bolt <NUM>, the elastic restoring force of the first tightening portion <NUM> may be utilized to return each of the tightening members <NUM> and <NUM> to their initial positions (the state before the tightening bolt <NUM> is tightened). Thus, the first tightening portion <NUM> and the second tightening portion <NUM> may be suppressed from interfering with (getting caught on) the insertion of each of the rods 100a to 100c.

Next, the fifth embodiment will be described with reference to <FIG> and <FIG>. <FIG> is a cross-sectional view of the bracket <NUM> of the fifth embodiment, and <FIG> is a cross-sectional view of the bracket <NUM> showing a state in which the horizontal rods 100a and 100b are tightened by the first tightening portion <NUM> and the second tightening portion <NUM>. It is noted that <FIG> and <FIG> shows a cross section of the bracket <NUM> cut along a plane corresponding to that in <FIG> and <FIG>.

Further, although <FIG> shows a state in which the horizontal rods 100a and 100b are tightened by the first tightening portion <NUM> and the second tightening portion <NUM>, respectively, when the percussion instrument is actually supported on a drum set, either one of the rods is tightened by the first tightening portion <NUM> or the second tightening portion <NUM>.

As shown in <FIG>, the tightening member <NUM> of the fifth embodiment is a metal or resin part formed in a rectangular parallelepiped shape that is long in the tightening direction of the tightening bolt <NUM>. The bracket <NUM> with the tightening member <NUM> housed therein is screwed to the housing of the percussion instrument, whereby the bracket <NUM> and the tightening member <NUM> are assembled to the housing of the percussion instrument. In this assembled state, a gap is formed between the pair of side walls <NUM> of the bracket <NUM> and the tightening member <NUM>, allowing the sliding displacement of the tightening member <NUM> in the tightening direction of the tightening bolt <NUM>.

The tightening member <NUM> is integrally formed with the first tightening portion <NUM> having a through hole 531a with a circular cross section connected to the insertion hole 311a and the second tightening portion <NUM> having a through hole 542d with a circular cross section connected to the insertion hole 311b. A recessed portion 242c is formed on the side surface of the second tightening portion <NUM> facing the tightening bolt <NUM> side, and the tightening force of the tightening bolt <NUM> acts on the second tightening portion <NUM>. As a result, the tightening member <NUM> performs sliding displacement along the tightening direction of the tightening bolt <NUM>.

Thus, as shown in <FIG>, by tightening the tightening bolt <NUM> with the horizontal rod 100a inserted into the insertion hole 311a and the through hole 531a of the first tightening portion <NUM>, the horizontal rod 100a is tightened by being sandwiched between the insertion hole 311a and the through hole 531a of the first tightening portion <NUM>. Similarly, by tightening the tightening bolt <NUM> with the horizontal rod 100b inserted into the insertion hole 311b, the horizontal rod 100b is tightened by being sandwiched between the insertion hole 311b and the through hole 542d of the second tightening portion <NUM>.

Further, the second tightening portion <NUM> is formed with a through hole 542e that extends upwardly and downwardly and connects to the insertion holes 312a and 314a. Thus, although not shown in the drawings, the vertical rod 100c inserted into the insertion hole 314a through the insertion hole 312a and the through hole 542e is fixed to the bracket <NUM> by being tightened to the insertion holes 312a and 314a and the through hole 542e.

Further, since the through hole 542d and the through hole 542e of the second tightening portion <NUM> are formed at positions overlapping the shaft portion <NUM> of the tightening bolt <NUM> in the tightening direction of the tightening bolt <NUM>, the tightening force of the tightening bolt <NUM> is easily transmitted to the horizontal rod 100b and the vertical rod 100c. Thus, each of the rods 100b and 100c may be firmly fixed to the bracket <NUM>.

Furthermore, since each of the rods 100a to 100c are tightened by the sliding displacement of the tightening member <NUM>, compared to the case where the tightening member is elastically deformed, fatigue of the tightening member <NUM> may be suppressed.

In this embodiment, the tightening member <NUM> is simply slidably held inside the bracket <NUM>, but the disclosure is not limited thereto. For example, an elastic body such as a spring for returning the tightening member <NUM> to the initial position thereof may be provided between the tightening member <NUM> and the side walls <NUM> of the bracket <NUM>. The same applies to the sixth embodiment (see <FIG> and <FIG>) described later.

Next, the sixth embodiment will be described with reference to <FIG> and <FIG>. <FIG> is a cross-sectional view of the bracket <NUM> of the sixth embodiment, and <FIG> is a cross-sectional view of the bracket <NUM> showing a state in which the horizontal rods 100a and 100b are tightened by the first tightening portion <NUM> and the second tightening portion <NUM>. It is noted that <FIG> and <FIG> shows a cross section of the bracket <NUM> cut along a plane corresponding to that in <FIG> and <FIG>.

As shown in <FIG>, the bracket <NUM> of the sixth embodiment has insertion holes 311a and 311b formed in line in the up and down direction in an outer circumferential wall <NUM>, and the bracket <NUM> has the same configuration as the bracket <NUM> of the fifth embodiment except for the point that the outer shape of the bracket <NUM> is a rectangular parallelepiped that is long in the up and down direction.

The tightening member <NUM> is a metal or resin part formed into a rectangular parallelepiped shape that is long in the up and down direction. The bracket <NUM> with the tightening member <NUM> housed therein is screwed to the housing of the percussion instrument, whereby the bracket <NUM> and the tightening member <NUM> are assembled to the housing of the percussion instrument. In this assembled state, a gap is formed between the pair of side walls <NUM> of the bracket <NUM> and the tightening member <NUM>, and the bracket <NUM> slidably holds the tightening member <NUM> in the tightening direction of the tightening bolt <NUM>.

The tightening member <NUM> is integrally formed with the first tightening portion <NUM> having a through hole 631a with a circular cross section connected to the insertion hole 311a and the second tightening portion <NUM> having a through hole 642d with a circular cross section connected to the insertion hole 311b.

A recessed portion 242c is formed on the side surface of the tightening member <NUM> facing the tightening bolt <NUM> side, and the tightening force of the tightening bolt <NUM> acts on the tightening member <NUM>. As a result, the tightening member <NUM> performs sliding displacement along the tightening direction of the tightening bolt <NUM>.

Thus, as shown in <FIG>, by tightening the tightening bolt <NUM> with the horizontal rod 100a inserted into the insertion hole 311a and the through hole 631a of the first tightening portion <NUM>, the horizontal rod 100a is tightened by being sandwiched between the insertion hole 311a and the through hole 631a of the first tightening portion <NUM>. Similarly, by tightening the tightening bolt <NUM> with the horizontal rod 100b inserted into the insertion hole 311b, the horizontal rod 100b is tightened by being sandwiched between the insertion hole 311b and the through hole 642d of the second tightening portion <NUM>.

Further, the tightening member <NUM> has a through hole <NUM> that intersects with each of the through holes 631a and 642d of the first tightening portion <NUM> and the second tightening portion <NUM>, and this through hole <NUM> extending upwardly and downwardly is connected to the insertion holes 312a and 314a. Thus, although not shown in the drawings, the vertical rod 100c inserted into the insertion hole 314a through the insertion hole 312a and the through hole <NUM> is fixed to the bracket <NUM> by being tightened to the insertion holes 312a and 314a and the through hole <NUM>.

The above description has been given based on the above embodiment, but the disclosure is not limited to the above embodiments, and it may be easily inferred that various improvements and modifications are possible without departing from the scope of the present invention as defined by the appended claims.

In the above embodiments, the percussion instruments <NUM> and <NUM> are electronic percussion instruments, but the disclosure is not necessarily limited thereto. For example, the above-mentioned configuration of each of the embodiments may be applied to the case where an acoustic percussion instrument (drum) is supported on each of the rods 100a to 100c.

In each of the above embodiments, the case where two types of horizontal rods 100a and 100b extending in the horizontal direction and having different diameters are tightened by the first tightening portions <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> and the second tightening portions <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, and <NUM> (hereinafter, simply referred to as the "tightening portion. "), but the disclosure is not necessarily limited thereto. It may also be configured such that two types of rods extending in a vertical direction (or in a direction inclined relative to the vertical direction) and having different diameters are tightened by the tightening portion. In this configuration, the orientation of the tightening portion may be changed according to the direction in which the rod extends.

Also, instead of using two types of rods, three or more types of rods extending in the same direction may be tightened by the tightening portion. As an example of such a configuration, a configuration is illustrated in which an insertion hole for inserting a third type of rod is added below the insertion hole 11b of the bracket of the first and second embodiments, the second tightening portions <NUM> and <NUM> are extended downward, and the third type of rod is tightened by the extended part. As another example, a configuration is illustrated in which, in addition to the insertion holes 311a and 311b of the fifth and sixth embodiments, an insertion hole for inserting a third type of rod is added, and a through hole connected to the insertion hole is formed in the tightening members <NUM> and <NUM>.

In each of the above embodiments, although a case has been described in which the tightening portion is formed at a position overlapping the shaft portion <NUM> of the tightening bolt <NUM> in the tightening direction of the tightening bolt <NUM>, in the same direction, the tightening portion may be formed at a position that does not overlap the shaft portion <NUM> of the tightening bolt <NUM>.

In the above-mentioned first embodiment, although a case has been described in which the protrusion <NUM> is formed in the vicinity of the slit 31b, the vicinity of the slit 31b is the area below the center C (slit 31b side) of the line segment connecting the lower end of the virtual circle V (the center of the slit 31b in the circumferential direction of the inner circumferential surface 31a) and the central axis O shown in <FIG>.

In the above first embodiment, a pair of protrusions <NUM> are formed in line in the insertion direction of the horizontal rod 100b (horizontal rod 100a), but this is not necessarily limited thereto. For example, the protrusions <NUM> may be formed across two ends of the first tightening portion <NUM> in the insertion direction of the horizontal rod 100b, or three or more protrusions <NUM> may be formed in the insertion direction of the horizontal rod 100b.

Claim 1:
A percussion instrument (<NUM>, <NUM>), supportable on a first rod (100a) and a second rod (100b) having a smaller diameter than the first rod, the percussion instrument comprising:
a housing; a bracket (<NUM>, <NUM>, <NUM>, <NUM>), provided on an outer surface of the housing; a tightening bolt (<NUM>), tightened toward a cavity inside the bracket; and a tightening portion, elastically deformed or performing sliding displacement inside the bracket by a tightening force of the tightening bolt,
the bracket comprising a first insertion hole (11a, 311a) into which the first rod is insertable, characterized in that the bracket further comprises a second insertion hole (11b, 14a, 311b) into which the second rod is insertable in a direction the same as an insertion direction of the first rod into the first insertion hole, wherein
the tightening portion is at least configured by a first tightening portion (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>) capable of tightening the first rod inserted into the first insertion hole and a second tightening portion (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) capable of tightening the second rod inserted into the second insertion hole.