Percussion instrument and method for reinforcing housing

Abstract

In the present invention, a support part 20 of a frame 2 has formed therein a plurality of regular hexagonal recesses 20a and through-holes 20b, arranged such that sides of the recesses and through-holes are adjacent to each other. Due to this configuration, part of the vibration (sound) from when a head 4 is hit can be discharged to the outside through the through-holes 20b, thereby suppressing echoing of the vibration within the frame 2. The rigidity of the support part 20 (frame 2) can be effectively enhanced by bottom walls 20c of the recesses 20a and side walls 20d that partition the recesses 20a and the through-holes 20b. Thus, the rigidity of the frame 2 can be improved while reducing the sound volume of when the head 4 is hit.

Description

Technical Field

[0001] The present invention relates to a percussion instrument and a method for reinforcing a housing, and more particularly, to a percussion instrument and a method for reinforcing a housing capable of improving a rigidity of the housing while reducing a sound volume generated at the time of striking on a head.Background Art

[0002] For example, Patent Document 1 describes a technique of forming a substantially triangular opening at a connecting portion 4c of a sensor frame 4 constituting a bottom surface in a housing of a percussion instrument. Since multiple openings are formed in a circumferential direction of the sensor frame 4, vibration generated at the time of striking a head 5 is easily released to outside through the openings. Accordingly, since the vibration at the time of striking on the head 5 can be prevented from reverberating in the housing, a sound volume generated at the time of such striking can be reduced. In addition, a rib-shaped wall rising from the bottom surface of the sensor frame 4 is provided around the opening, and a rigidity of the sensor frame 4 can be ensured by such a wall.Related Art DocumentsPatent Documents

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-198657 (for example, paragraphs 0044, 0048, and 0051, FIG. 2)SUMMARY OF INVENTIONProblem to Be Solved by Invention

[0004] In this type of percussion instrument, there is a demand for a technique capable of more effectively improving the rigidity of a housing while reducing the sound volume generated at the time of striking on a head.

[0005] The present invention has been made to solve the above problem, and an objective thereof is to provide a percussion instrument and a method for reinforcing a housing capable of improving a rigidity of a housing while reducing a sound volume generated at the time of striking on a head.Means for Solving Problem

[0006] To achieve such an objective, a percussion instrument of the present invention includes: a head forming a striking surface; and a housing having a cylindrical portion in a cylindrical shape, the cylindrical portion having an opening portion to be covered with the head. The housing includes multiple holes in a polygonal shape formed on a bottom surface located on an inner circumferential side of the cylindrical portion and arranged such that sides of the holes are adjacent to each other. At least a part of the holes among the multiple holes extend through the bottom surface of the housing.

[0007] A method for reinforcing a housing of the present invention is a method for reinforcing a housing in a percussion instrument. The percussion instrument includes: a head forming a striking surface; and a housing having a cylindrical portion in a cylindrical shape, the cylindrical portion having an opening portion on one end side to be covered with the head. The method includes: forming multiple holes in a polygonal shape on a bottom surface of the housing located on an inner circumferential side of the cylindrical portion, the holes being arranged such that sides of the holes are adjacent to each other; and extending at least a part of the holes among the multiple holes through the bottom surface of the housing.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] [FIG. 1] is an exploded perspective view of a percussion instrument of a first embodiment. [FIG. 2] is a cross-sectional view of the percussion instrument. [FIG. 3] is a perspective view of a frame showing a state in which an attaching member is removed. [FIG. 4] (a) is a front view of the percussion instrument as viewed in a direction of an arrow IVa in FIG. 2, and (b) is a partially enlarged cross-sectional view of the percussion instrument taken along a line IVb-IVb in FIG. 4(a). [FIG. 5] is a rear perspective view of a stand showing a state in which the percussion instrument is removed. [FIG. 6] is a partially enlarged cross-sectional view of a pedal support plate and the frame showing a support structure provided by a support rubber. [FIG. 7] is a cross-sectional view of the stand showing a state in which the percussion instrument is struck by a beater. [FIG. 8] is a rear perspective view of a stand of a second embodiment. [FIG. 9] is an exploded perspective view of the stand showing a state in which the percussion instrument is removed. [FIG. 10] is a side view of the stand showing a state in which the percussion instrument is struck by a beater. [FIG. 11] is a rear perspective view of a stand of a third embodiment. [FIG. 12] is a side view of the stand showing a state in which the percussion instrument is struck by a beater. DESCRIPTION OF THE EMBODIMENTS

[0009] Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. First, with reference to FIG. 1, an overall configuration of a percussion instrument 1 of a first embodiment will be described. FIG. 1 is an exploded perspective view of the percussion instrument 1 of the first embodiment.

[0010] As shown in FIG. 1, the percussion instrument 1 is an electronic percussion instrument that simulates an acoustic bass drum, and includes a frame 2 that constitutes a housing of the percussion instrument 1. The frame 2 includes a substantially disc-shaped support portion 20 configured to support a head sensor 3, and an outer circumferential portion 21 in a cylindrical shape rises from an outer edge of the support portion 20.

[0011] A cylindrical portion 22 for stretching a head 4 is formed on an inner circumferential side of the outer circumferential portion 21, and such portions 20 to 22 of the frame 2 are integrally formed using a resin material. With the cylindrical portion 22 in a cylindrical shape rising from the support portion 20, a recessed groove 23 extending in a circumferential direction is formed between the outer circumferential portion 21 and the cylindrical portion 22.

[0012] On a bottom surface of the recessed groove 23 (a portion of the support portion 20 located between the outer circumferential portion 21 and the cylindrical portion 22), multiple (six in the present embodiment) female screw holes 23a are arranged at equal intervals in the circumferential direction, and a head frame 40 of the head 4 is attached using such female screw holes 23a.

[0013] The head 4 is formed in a disc shape using a mesh made of woven synthetic fibers, and a ring-shaped head frame 40 is fixed to an outer edge of the head 4. The head frame 40 is formed using a resin material, and the head 4 and the head frame 40 are integrally molded by die molding. The head frame 40 may also be formed using a material other than a resin (for example, a metal such as aluminum or iron), and the head frame 40 may also be joined to the head 4 by adhesion or the like.

[0014] Multiple insertion holes (not shown) are formed in the head frame 40 at positions corresponding to the female screw holes 23a of the frame 2, and bolts B1 are inserted into such insertion holes. With an opening portion of the cylindrical portion 22 covered with the head 4, by fastening the bolts B1 to the female screw holes 23a, the head frame 40 is pulled toward a bottom side of the recessed groove 23, and a tension is applied to the head 4 (see FIG. 2 for a state in which a tension is applied to the head 4).

[0015] With a tension applied to the head 4, the head sensor 3 contacts a back surface of the head 4, and vibration at the time of striking on the head 4 is detected by the head sensor 3. The head 4 of the percussion instrument 1 simulating a bass drum is struck by a beater 162 (see FIG. 7) of a foot pedal 160, and details of striking by the beater 162 will be described later.

[0016] Upon detection, by the head sensor 3, of striking on the head 4, a musical tone signal based on the detection result is generated by a sound source (not shown). By outputting the musical tone signal to an amplifier or a speaker (both not shown), an electronic musical tone is emitted from the speaker. Such an impact at the time of striking on the head 4 is absorbed by a first cushion 5 and a second cushion 6. Configurations of the cushions 5 and 6 will be described with reference to FIG. 1 and FIG. 2.

[0017] FIG. 2 is a cross-sectional view of the percussion instrument 1. FIG. 2 shows a cross-section taken along a plane that includes an axis (center) of the cylindrical portion 22 in a cylindrical shape and includes the head sensor 3.

[0018] As shown in FIG. 1 and FIG. 2, a first cushion 5 and a second cushion 6 are sequentially stacked on the frame 2 (support portion 20) of the percussion instrument 1 from the head 4 side. The cushions 5 and 6 are each formed in a disc shape having a diameter that is the same as (or slightly smaller than) an inner diameter of the cylindrical portion 22 of the frame 2. Through holes 50 and 60 for disposing the head sensor 3 are formed in the cushions 5 and 6. Such through holes 50 and 60 are formed in shapes corresponding to an attaching member 8 configured to support the head sensor 3, and details of the attaching member 8 will be described later with reference to FIG. 2 and FIG. 3.

[0019] A total thickness of the two cushions 5 and 6 is formed to be greater than a spacing between the support portion 20 of the frame 2 and the head 4. Therefore, the cushions 5 and 6 are stacked in a compressed state between the support portion 20 and the head 4. In FIG. 2, the second cushion 6 is shown as a one-layer cushion to simplify the drawing, but actually the second cushion 6 is composed of three layers of cushions.

[0020] The cushions 5 and 6 are each formed in a disc shape using a foamed synthetic resin of polyurethane foam. However, the cushions 5 and 6 may also be formed using a rubber, a resin such as an elastomer (synthetic resin), or a foamed material using such resins (hereinafter referred to as an "elastic material"), as long as the cushions 5 and 6 have a predetermined flexibility.

[0021] In the case of forming the cushions 5 and 6 from an elastic material such as a rubber or an elastomer (solid material that is not a foamed material), it is preferable to use an elastic material that exhibits a hardness of 10 or more and 50 or less measured with a durometer type A hardness meter in accordance with JIS K6253-3:2012. In addition, in the case of forming the cushions 5 and 6 from a foamed material (sponge) of a rubber, a synthetic resin, or the like, it is preferable to measure the hardness in accordance with JIS K6253-3:2012.

[0022] By sandwiching such cushions 5 and 6, which are softer than the frame 2, between the support portion 20 and the head 4, vibration (impact) at the time of striking the head 4 can be absorbed by the cushions 5 and 6. Therefore, a sound volume generated at the time of striking on the head 4 can be reduced. In addition, multiple vent holes 51 and 61 that connect a surface (surface facing the head 4 side) and a back surface (surface facing the support portion 20 side) of the cushions 5 and 6 are formed in the cushions 5 and 6. By forming such vent holes 51 and 61, since ventilation from the head 4 side toward the support portion 20 side can be ensured, the sound generated by vibration of the cushions 5 and 6 at the time of striking on the head 4 can be reduced. This can also reduce the sound volume generated at the time of striking on the head 4.

[0023] As a technique for sandwiching such cushions 5 and 6 between the support portion 20 of the frame 2 and the head 4, the technique of Japanese Patent Application Laid-Open No. 2001-142459 is known. In such a technique as well, the impact at the time of striking on a head (head member 11) can be absorbed by a cushion (impact absorbing member 22). However, in such a technique, since the cushion is one layer, the impact at the time of striking on the head concentrates on a part of the cushion (struck position) where the impact has no path to release. Therefore, there is a problem that the cushion is prone to be damaged.

[0024] In contrast, in the present embodiment, since the first cushion 5 disposed on the head 4 side and the second cushion 6 disposed on the support portion 20 side are stacked together, upon striking of the head 4, movements can be generated, such as the upper and lower cushions 5 and 6 contacting and separating from each other, and the cushions 5 and 6 sliding laterally. Accordingly, since the impact at the time of striking on the head 4 can be released between layers of the cushions 5 and 6, the cushions 5 and 6 become less likely to be damaged compared to the case where the cushion is one layer.

[0025] Similarly, since the second cushion 6 is composed of three layers of cushions, the impact at the time of striking on the head 4 can be released between the layers of the cushions constituting the second cushion 6. Therefore, the second cushion 6 becomes less likely to be damaged compared to the case where the second cushion 6 is one layer.

[0026] In addition, the hardness of the first cushion 5 (hardness in accordance with the above JIS standard) is lower than the hardness of the second cushion 6. That is, since the first cushion 5 is formed to be softer than the second cushion 6, the impact at the time of striking on the head 4 can be easily absorbed by the first cushion 5, while a striking feel at the time of striking can be easily provided by the relatively hard second cushion 6. Therefore, a striking feel similar to that of an acoustic drum can be obtained while reducing the sound generated at the time of striking on the head 4.

[0027] Herein, in the case where the head 4 is struck by the beater 162 (see FIG. 7), a center side of the head 4 is mainly struck, while an outer circumferential side of the head 4 is rarely struck. Therefore, in the following description, a region formed in the vicinity of the center of the head 4 and forming 30% or less of the area of the head 4 will be defined and described as a struck region (first region) (region indicated by R1 in FIG. 4), and a region on the outer circumferential side of the struck region will be defined and described as a non-struck region (second region).

[0028] In the case where the struck region of the head 4 is struck, the head 4 may bite into the vent holes 51 due to the striking. If the head 4 bites into the vent holes 51, cuts may be generated from edges of opening portions of the vent holes 51, and the first cushion 5 may become prone to be damaged.

[0029] In contrast, in the present embodiment, an opening ratio of the vent holes 51 in a portion (portion overlapping with the struck region in an axial view of the cylindrical portion 22) of the first cushion 5 corresponding to the struck region is lower than an opening ratio of the vent holes 51 in a portion (portion overlapping with the non-struck region in the axial view of the cylindrical portion 22) corresponding to the non-struck region. Accordingly, since striking can be received at the portion of the first cushion 5 where the opening ratio of the vent holes 51 is relatively low, concentration of a stress acting on the first cushion 5 due to the impact at the time of striking can be mitigated. Therefore, damage to the first cushion 5 can be suppressed.

[0030] In addition, in the present embodiment, the opening ratio of the vent holes 51 in the first cushion 5 and an opening ratio of the vent holes 61 in the second cushion 6 are set to values different from each other. More specifically, the areas of the cushions 5 and 6 are substantially the same, but the opening ratio (for example, 20% or more and less than 30%) of the vent holes 51 with respect to the area of the cushion 5 is lower than the opening ratio (for example, 30% or more and 40% or less) of the vent holes 61 with respect to the area of the cushion 6. That is, since the opening ratio of the vent holes 51 of the first cushion 5, which is substantially directly struck, is relatively small, biting of the head 4 into the vent holes 51 at the time of striking on the head 4 can be suppressed. Therefore, damage to the cushion 5 can be suppressed.

[0031] As shown in the enlarged portion at the lower right of FIG. 2, a film member 7 is sandwiched between the cushions 5 and 6. Although illustration is omitted, the film member 7 is formed with a through hole (having the same shape as the through holes 50 and 60 shown in FIG. 1) for passing the head sensor 3 (attaching member 8) therethrough.

[0032] The film member 7 is formed in a film shape using a mesh made of woven synthetic fibers. That is, since multiple vent holes (not shown) smaller than the vent holes 51 and 61 of the cushions 5 and 6 are formed in the film member 7, ventilation through the vent holes 51 and 61 of the cushions 5 and 6 can be prevented from being blocked by the film member 7. Accordingly, even in the case of laminating the film member 7 between the cushions 5 and 6, since ventilation between the layers of the cushions 5 and 6 can be ensured, the sound generated by vibration of the cushions 5 and 6 at the time of striking on the head 4 can be reduced.

[0033] In addition, by sandwiching the film member 7 between the cushions 5 and 6, at the time of striking on the head 4, biting into the vent holes 51 and 61 and compression (strong adhesion) of the cushions 5 and 6 to each other can be suppressed. Therefore, damage to the cushions 5 and 6 (particularly, the relatively soft first cushion 5) can be suppressed.

[0034] In addition, since the film member 7 is formed using a mesh made of woven synthetic fibers, the film member 7 has a lower coefficient of friction compared to the cushions 5 and 6. Accordingly, wearing of the cushions 5 and 6 (particularly, the relatively soft first cushion 5) due to rubbing against the film member 7 can be suppressed.

[0035] As shown in the enlarged portion at the upper right of FIG. 2, recesses 20a and through holes 20b are formed in the support portion 20, and the film member 7 is also laminated between the support portion 20 and the second cushion 6. As described above, since the film member 7 has ventilation properties (multiple vent holes smaller than the recesses 20a and the through holes 20b are formed), ventilation from the head 4 to the through holes 20b can be ensured. Therefore, since a part of the sound (vibration) generated at the time of striking on the head 4 can be released to outside, reverberation of such vibration within the frame 2 can be suppressed. Therefore, the sound volume generated at the time of striking on the head 4 can be reduced.

[0036] In addition, by laminating the film member 7 between the support portion 20 and the second cushion 6, biting of the cushion 6 into the recesses 20a and the through holes 20b at the time of striking on the head 4 can be suppressed. Therefore, damage to the cushion 6 can be suppressed.

[0037] Next, detailed configurations of the recesses 20a and the through holes 20b formed in the support portion 20 will be described with reference to FIG. 2 and FIG. 3. FIG. 3 is a perspective view of the frame 2 showing a state in which the attaching member 8 is removed.

[0038] As shown in FIG. 2 and FIG. 3, multiple recesses 20a and through holes 20b are formed in a portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22. The recess 20a is a hole recessed in the support portion 20, and the through hole 20b is a hole extending through the support portion 20 (see the enlarged portion at the upper right of FIG. 2 or FIG. 5 for illustration of the through hole 20b extending through the support portion 20). That is, the recess 20a has a bottom portion closed by a bottom wall 20c, while the through hole 20b extends through the support portion 20 without such a bottom wall 20c being formed.

[0039] The multiple recesses 20a and through holes 20b are formed in a polygonal shape (in the present embodiment, a regular hexagonal shape) arranged such that sides thereof are adjacent to each other. In other words, the multiple recesses 20a and through holes 20b are partitioned by side walls 20d, and the recess 20a and the through hole 20b are adjacent to each other with one side wall 20d interposed therebetween.

[0040] By forming such multiple recesses 20a and through holes 20b in the support portion 20, a part of the vibration (sound) at the time of striking the head 4 can be released to outside through the through holes 20b. Therefore, since reverberation of such vibration within the frame 2 can be suppressed, the sound volume at the time of striking on the head 4 can be reduced. In addition, a rigidity of the frame 2 (support portion 20) can be effectively improved by the bottom wall 20c (wall closing the hole) of the recess 20a and the side wall 20d partitioning the recess 20a and the through hole 20b.

[0041] In addition, multiple recesses 20a and through holes 20b having the same shape are arranged in the support portion 20 to fill the plane. Accordingly, the rigidity of the support portion 20 (bottom surface of the frame 2) can be uniformly enhanced throughout the entire support portion 20.

[0042] In the case of filling the plane in the support portion 20 with the recesses 20a and the through holes 20b, it is also possible to form the recesses 20a and the through holes 20b in an equilateral triangular shape, a square shape, or another polygonal shape (for example, parallelogram or any quadrilateral shape), but in the case of comparing among polygons having the same inscribed circle diameter, the recesses 20a and the through holes 20b are most preferably formed in a regular hexagonal shape as in the present embodiment. Accordingly, since the support portion 20 has a honeycomb structure, and the number of sides (side walls 20d) capable of dispersing an impact from lateral directions (adjacent recesses 20a and through holes 20b) is greater than in the case of other polygons, the rigidity of the support portion 20 (frame 2) can be effectively improved.

[0043] In addition, in the present embodiment, the recesses 20a and the through holes 20b are arranged without gaps therebetween in a region of 60% or more of an area in the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22. Accordingly, the rigidity of the frame 2 (support portion 20) can be effectively improved by the recesses 20a and the through holes 20b (bottom walls 20c and side walls 20d) while improving sound releasing properties through the through holes 20b.

[0044] The larger the area in which the recesses 20a and the through holes 20b are formed, the more the sound releasing properties and the rigidity of the support portion 20 can be improved. Therefore, the recesses 20a and the through holes 20b are more preferably formed in a region of 70% or more, and even more preferably formed in a region of 80% or more, of the area of the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22.

[0045] Herein, in the case of forming only the recesses 20a in the support portion 20 (closing all the through holes 20b to configure as recesses 20a), although the rigidity of the support portion 20 increases, the vibration at the time of striking on the head 4 is not released to outside. Therefore, quietness of the percussion instrument 1 decreases. On the other hand, in the case of forming only the through holes 20b in the support portion 20 (configuring all the recesses 20a as through holes 20b), the rigidity of the support portion 20 cannot be sufficiently improved, and most of the vibration at the time of striking on the head 4 is released from the through holes 20b, so the sound absorption effect of absorbing vibration reverberated within the frame 2 by the cushions 5 and 6 cannot be obtained at all, which is also unfavorable from the viewpoint of quietness of the percussion instrument 1.

[0046] Therefore, the opening ratio of the through holes 20b is preferably 15% or more and 35% or less, and more preferably 20% or more and 30% or less, of the area of the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22. By forming the through holes 20b at such an opening ratio, the rigidity of the support portion 20 (frame 2) can be effectively improved by the walls 20c and 20d constituting the recesses 20a and the through holes 20b while ensuring sound releasing properties through the through holes 20b.

[0047] In this manner, in the case of configuring the recesses 20a as recesses formed in the support portion 20 while configuring the through holes 20b as holes extending through the support portion 20, it is also possible to fix a flat plate-shaped bottom wall 20c formed separately from the support portion 20 (side wall 20d) to the support portion 20 (side wall 20d) by adhesion or the like, for example. However, with such a configuration, the rigidity of the frame 2 (support portion 20) cannot be sufficiently improved. In contrast, in the present embodiment, since the bottom wall 20c and the side wall 20d of the support portion 20 are integrally formed using a resin material, the rigidity of the support portion 20 (frame 2) can be effectively improved.

[0048] In addition, in the present embodiment, the entire bottom portion of the recess 20a is closed by the bottom wall 20c, while the bottom wall 20c is not formed in the through hole 20b, but it is also possible to adopt a configuration of forming a hole extending through a part of the bottom wall 20c of the recess 20a (or closing a part of the bottom portion of the through hole 20b), for example. However, with a configuration of forming a hole extending through a part of the bottom wall 20c of the recess 20a, the structure of the mold for resin-molding the frame 2 becomes complicated. That is, in the case of attempting to change the opening ratio of holes extending through the support portion 20, the design of the mold becomes complicated.

[0049] In contrast, with a configuration in which the entire bottom portion of the recess 20a is closed by the bottom wall 20c while the bottom wall 20c is not formed in the through hole 20b as in the present embodiment, the structure of the mold for resin-molding the frame 2 can be simplified. That is, for example, in the case of increasing the opening ratio of the through holes 20b in the support portion 20, it is only necessary to simply increase the number of through holes 20b to be formed (changing from the recesses 20a to the through holes 20b), so the design of the mold can be facilitated.

[0050] Next, a detailed configuration of the attaching member 8 to which the head sensor 3 is attached will be described below. The attaching member 8 includes a flat plate-shaped fixing portion 80 configured to be fixed to the support portion 20, attaching portions 81 in a columnar shape rising from the fixing portion 80 and configured for attaching the head sensor 3, and a wall portion 82 formed to surround the attaching portions. Such portions 80 to 82 are integrally formed using a resin material.

[0051] A pair of insertion holes 80a are formed at both end sides of the fixing portion 80 in the circumferential direction of the cylindrical portion 22, and female screw holes 20e (see FIG. 3) are formed in the support portion 20 at positions corresponding to the pair of insertion holes 80a. By fastening bolts B2, which are inserted into the insertion holes 80a, to the female screw holes 20e, the attaching member 8 is attached to the frame 2 (support portion 20).

[0052] A plate 9 configured to support the head sensor 3 is attached to the attaching portions 81 of the attaching member 8. The plate 9 is a substantially elliptical plate having a dimension in the circumferential direction of the cylindrical portion 22 (longitudinal direction of the plate 9) larger than a dimension in a radial direction (width direction). A pair of insertion holes 90 are formed at both end sides in the longitudinal direction of the plate 9. By fastening bolts B3, which are inserted into the pair of insertion holes 90, to the female screw holes of the attaching portions 81 of the attaching member 8, the plate 9 is attached to the attaching member 8. Accordingly, the head sensor 3 is supported by the attaching member 8 via the plate 9.

[0053] Since the attaching member 8 is attached at a position eccentric to the outer circumferential side (lower side) from the center of the support portion 20 (head 4), the head sensor 3 is also disposed at a position eccentric from the center of the support portion 20. This is to prevent the striking force of the beater 162 (see FIG. 7), which has a relatively large striking force, from being directly applied to the head sensor 3.

[0054] With the head sensor 3 attached to the attaching member 8 (see FIG. 2), the wall portion 82 in a wall shape rising from the fixing portion 80 is disposed around the head sensor 3. Since the wall portion 82 protrudes higher than the cylindrical portion 22 and contacts the head 4 (pushes up the head 4), the tension of the head 4 around the head sensor 3 can be increased. Accordingly, even in the case where the head sensor 3 is disposed at an eccentric position on the outer circumferential side of the head 4, vibration at the time of striking on the head 4 becomes easily detected by the head sensor 3. Therefore, the striking on the head 4 can be detected with high accuracy.

[0055] Next, with reference to FIG. 4, configurations of the head sensor 3 and the attaching member 8 will be further described. FIG. 4(a) is a front view of the percussion instrument 1 as viewed in the direction of an arrow IVa in FIG. 2, and FIG. 4(b) is a partially enlarged cross-sectional view of the percussion instrument 1 taken along a line IVb-IVb in FIG. 4(a). In FIG. 4(a), the head sensor 3 (cushion 32) and the wall portion 82 hidden by the head 4 are illustrated in broken lines, but for the wall portion 82, only the portion in contact with the head 4 is illustrated in broken lines.

[0056] As shown in FIG. 4, a disc-shaped sensor 31 (piezoelectric element) is adhered to an upper surface of the plate 9 (see FIG. 4(b)) by a double-sided tape 30 having cushioning properties, and a cushion 32 is adhered to an upper surface of such a sensor 31. The head sensor 3 is configured by the double-sided tape 30, the sensor 31, and the cushion 32.

[0057] The cushion 32 of the head sensor 3 is a buffer material in a columnar shape formed using a flexible material such as a sponge, a rubber, or a thermoplastic elastomer, and the cushion 32 contacts the head 4.

[0058] A region in the head 4 that is expected to receive striking by the beater 162 (see FIG. 7) will be defined as a struck region R1 (see FIG. 4(a)). As described above, the struck region R1 is a region formed in the vicinity of the center of the head 4 and is 30% or less of the area of the head 4.

[0059] In such a case, with a configuration in which the wall portion 82 is formed in a region between the struck region R1 and the head sensor 3, such as a configuration in which the wall portion 82 surrounds the entire circumference around the head sensor 3, vibration of the head 4 stretched in the region between the struck region R1 and the head sensor 3 becomes prone to be hindered by the wall portion 82 upon striking of the struck region R1. Therefore, the vibration at the time of striking on the struck region R1 cannot be sufficiently transmitted to the head sensor 3.

[0060] In contrast, in the present embodiment, the wall portion 82 is formed in a partial region around the head sensor 3, and the wall portion 82 is not formed in the region between the head sensor 3 and the struck region R1 (center C1 of the striking surface). Accordingly, since hindrance caused by the wall portion 82 to the vibration of the head 4 located between the struck region R1 and the head sensor 3 can be suppressed, the vibration at the time of striking on the head 4 (struck region R1) becomes easily detected by the head sensor 3. Therefore, the striking on the head 4 can be detected with high accuracy.

[0061] In this manner, to suppress hindrance caused by the wall portion 82 to the vibration of the head 4 located between the struck region R1 and the head sensor 3, for example, it is also possible to form the wall portion 82 at positions indicated by virtual lines V in FIG. 4(a). That is, as indicated by the virtual lines V, it is also possible to form a pair of wall portions 82 extending toward the struck region R1 side (extending in a radial direction) with the head sensor 3 interposed therebetween, to cause the pair of wall portions 82 to contact the head 4. However, in the case of forming the wall portions 82 at the positions indicated by the virtual lines V, since an end portion on the upper surface of the wall portion 82 (end portion located on the struck region R1 side) becomes prone to be stuck into the head 4 during vibration of the head 4, the head 4 becomes prone to be damaged.

[0062] In contrast, the wall portion 82 of the present embodiment is formed to extend in the circumferential direction of the cylindrical portion 22 in a region on a side opposite to the struck region R1 (center C1 of the head 4) with the head sensor 3 interposed therebetween. Accordingly, compared to the case of forming the wall portions 82 at the positions indicated by the virtual lines V, end portions on the upper surface of the wall portion 82 (both ends on the upper surface of the wall portion 82 in the circumferential direction of the cylindrical portion 22) can be prevented from being stuck into the head 4 during vibration of the head 4. Therefore, the vibration of the head 4 located between the struck region R1 and the head sensor 3 can be efficiently transmitted to the head sensor 3 while suppressing damage to the head 4.

[0063] In addition, when viewing the head 4 in a plan view, the wall portion 82 is formed in an arc shape centered on the center C1 of the head 4 (an arc shape extending along the circumferential direction of the cylindrical portion 22). That is, since the center C1 of the head 4 and the center of the wall portion 82 are concentric, the tension of the head 4 around the head sensor 3 can be uniformly increased. Therefore, the vibration at the time of striking on the head 4 can be detected with high accuracy by the head sensor 3. Furthermore, by forming the wall portion 82 in an arc shape, since concentration of the stress acting on the head 4 and the wall portion 82 at the time of striking can be mitigated, damage to the head 4 and the wall portion 82 can be suppressed.

[0064] In addition, as shown in FIG. 4(b), in an extending direction of the wall portion 82 (circumferential direction of the cylindrical portion 22), the head 4 mainly contacts in a region R2 in which the height of the wall portion 82 is constant. With both ends of the region R2 as boundaries, the height of the wall portion 82 (height from the fixing portion 80) is formed gradually lower. That is, since the height of the wall portion 82 is formed gradually lower at both end sides in the extending direction thereof, upper surfaces of the wall portion 82 at the both end portions have an R-shape. Accordingly, since both end portions on the upper surface of the wall portion 82 can be prevented from being stuck into the head 4 during vibration of the head 4, damage to the head 4 can be suppressed.

[0065] In addition, since the wall portion 82 is formed on the attaching member 8 which is detachably attached to the support portion 20, the height of the wall portion 82 can be easily adjusted by inserting a spacer or the like between the support portion 20 and the attaching member 8 to change an attaching height for the attaching member 8. Therefore, a contact pressure of the wall portion 82 against the head 4, that is, the tension of the head 4, can be easily adjusted.

[0066] Next, a configuration of a stand 100 configured to support the percussion instrument 1 will be described with reference to FIG. 5. FIG. 5 is a rear perspective view of the stand 100 showing a state in which the percussion instrument 1 is removed.

[0067] As shown in FIG. 5, the stand 100 is a member configured to support the percussion instrument 1, and is a member that constitutes a percussion instrument unit together with the percussion instrument 1. The stand 100 includes a pedal support plate 110 made of metal configured to support the percussion instrument 1. Such a pedal support plate 110 is a member configured to support a foot pedal 160 (see FIG. 7) to be described later. A front leg 120 and a rear leg 130 for mounting the stand 100 on a mounting surface are fixed on a rear surface of the pedal support plate 110 (surface opposite to a front surface to which the percussion instrument 1 is attached).

[0068] The front leg 120 includes a fixing portion 121 that extends in a horizontal direction and is fixed to the rear surface of the pedal support plate 110, and a pair of leg portions 122 that bend from both longitudinal ends of the fixing portion 121. Such portions 121 and 122 are formed by bending a metal pipe.

[0069] An upper pipe 123 that protrudes upward from an upper surface of the fixing portion 121 is welded to the fixing portion 121, and the upper pipe 123 extending vertically is also fixed to the rear surface of the pedal support plate 110. The pair of left and right leg portions 122 are inclined downward toward a front side from both ends of the fixing portion 121, and contact the mounting surface at a front side of the pedal support plate 110.

[0070] The rear leg 130 includes a fixing portion 131 that extends in the horizontal direction and is fixed to the rear surface of the pedal support plate 110, and a pair of leg portions 132 that bend from both longitudinal ends of the fixing portion 131. Such portions 131 and 132 are formed by bending a metal pipe.

[0071] Two lower pipes 133 that protrude downward from a lower surface of the fixing portion 131 are welded to the fixing portion 131, and the two lower pipes 133 extending vertically are also fixed to the rear surface of the pedal support plate 110. The pair of left and right leg portions 132 are inclined downward toward a rear side from both ends of the fixing portion 131 and contact the mounting surface.

[0072] The pedal support plate 110 is supported on the mounting surface at four points by the front and rear legs 120 and 130. A lower end portion of the pedal support plate 110 is bent toward the front side to form a pedal fixing portion 111, and a foot pedal 160 (see FIG. 7) is supported on the pedal fixing portion 111.

[0073] Attaching holes 112 are formed on an upper end side of the pedal support plate 110 (upper side of the fixing portion 121 of the front leg 120). The attaching holes 112 are formed as a pair spaced apart in the horizontal direction (with the upper pipe 123 interposed therebetween), and support rubbers 140 are fixed using the pair of attaching holes 112. A pair of attaching holes 20f for fixing the support rubbers 140 are formed on a rear surface of the support portion 20 (frame 2) of the percussion instrument 1. A support structure for the support portion 20 (frame 2) using such support rubbers 140 will be described with reference to FIG. 6. FIG. 6 is a partially enlarged cross-sectional view of the pedal support plate 110 and the frame 2 showing the support structure provided by the support rubber 140.

[0074] As shown in FIG. 6, the support rubber 140 includes a first cylindrical portion 141 in a cylindrical shape that is fixed to the pedal support plate 110 side, and a second cylindrical portion 142 that is fixed to the support portion 20 (frame 2) side. Such cylindrical portions 141 and 142 are integrally formed using a rubber.

[0075] An inner cylinder 150 is inserted into an insertion hole 141a on an inner circumferential side of the first cylindrical portion 141. The inner cylinder 150 is a metal cylindrical body, and a bolt B4 is inserted from one axial end (front end on a right side in FIG. 6) of the inner cylinder 150. By inserting the bolt B4 into the attaching hole 112 of the pedal support plate 110 and fastening to a nut N1, the support rubber 140 is fixed to the pedal support plate 110.

[0076] A length of the insertion hole 141a in an axial direction of the inner cylinder 150 is greater than a length of the inner cylinder 150 in the same direction. Therefore, with the bolt B4 fastened to the nut N1, the first cylindrical portion 141 is in a state compressed by the pedal support plate 110 and a head portion of the bolt B4. Accordingly, loosening of the bolt B4 and the nut N1 can be suppressed utilizing an elastic recovery force of the first cylindrical portion 141.

[0077] An inner cylinder 150 similar to that in the first cylindrical portion 141 is inserted into an insertion hole 142a on an inner circumferential side of the second cylindrical portion 142, and a bolt B4 is inserted from another axial end (rear end on a left side in FIG. 6) of the inner cylinder 150. By inserting the bolt B4 into the attaching hole 20f of the support portion 20 and fastening to a nut N1, the support portion 20 (frame 2) is fixed to the support rubber 140. Similarly, with the bolt B4 fastened to the nut N1, the second cylindrical portion 142 is in a state compressed by the support portion 20 and a head portion of the bolt B4. Therefore, loosening of the bolt B4 and the nut N1 can be suppressed utilizing an elastic recovery force of the second cylindrical portion 142.

[0078] In this manner, in the present embodiment, the percussion instrument 1 is swingably supported on the pedal support plate 110 of the stand 100 via the support rubbers 140. A case where the percussion instrument 1 is struck by the foot pedal 160 will be described with reference to FIG. 6 and FIG. 7. FIG. 7 is a cross-sectional view of the stand 100 showing a state in which the percussion instrument 1 is struck by the beater 162.

[0079] FIG. 7 illustrates a cross-section taken along a plane including a center of the stand 100 in the horizontal direction (left-right direction as viewed from a performer), that is, a center C1 (see FIG. 4) of the head 4 of the percussion instrument 1. In addition, in FIG. 7, to simplify the drawing, illustration of the cross-sectional structure of the percussion instrument 1 is omitted and hatching is applied, and the foot pedal 160 is illustrated in a side view rather than a cross-section.

[0080] As shown in FIG. 7, the foot pedal 160 is in a single pedal form that includes a pedal 161 configured to be stepped on by a performer, and a beater 162 configured to rotate due to stepping of the pedal 161.

[0081] With the foot pedal 160 supported on the pedal fixing portion 111 of the pedal support plate 110, by stepping on the pedal 161, the percussion instrument 1 is struck by the beater 162. A striking position struck by the beater 162 is within the struck region R1 of the head 4 described with reference to FIG. 4, that is, a position that substantially coincides with the center C1 of the head 4.

[0082] In the following description, the center C1 of the head 4 shown in FIG. 4 will be recited and described as a "center of the striking surface" and the like, and the striking on the struck region R1 of the head 4 by the beater 162 will be simply recited and described as "striking on the percussion instrument 1 by the beater 162" and the like.

[0083] As described above, since the frame 2 (housing) of the percussion instrument 1 is swingably supported on the pedal support plate 110 via the support rubbers 140, the percussion instrument 1 swings relatively with respect to the stand 100 (pedal support plate 110 and legs 120 and 130) when the percussion instrument 1 is struck by the beater 162. With such swinging, the impact of striking by the beater 162 can be absorbed. Therefore, vibration transmitted to the mounting surface S via the portions (pedal support plate 110 and legs 120 and 130) of the stand 100 can be reduced during striking on the percussion instrument 1 by the beater 162.

[0084] Herein, a point that is located on an axis of the bolt B4 shown in FIG. 6 and located on a plane including the front surface of the pedal support plate 110 will be defined as a fixing position P1 of the support rubber 140 with respect to the pedal support plate 110. Similarly, a point that is located on the axis of the bolt B4 and located on a plane including the rear surface of the support portion 20 (frame 2) will be described as a fixing position P2 of the support rubber 140 with respect to the frame 2.

[0085] As shown in FIG. 7, the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) with respect to the frame 2 is located at a height different from the center of the striking surface in the vertical direction. Accordingly, since the striking by the beater 162 can be received at a height different from the swing fulcrum of the percussion instrument 1, the percussion instrument 1 easily swings relatively with respect to the pedal support plate 110. Therefore, since the impact of striking by the beater 162 is easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0086] In this manner, in the case of aiming to configure the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) with respect to the frame 2 to be at a height different from the center of the striking surface, for example, it is also possible to configure the fixing positions P1 and P2 of the support rubber 140 to be on the lower side of the center of the striking surface.

[0087] However, since the direction of striking by the beater 162 is often a direction that descends and inclines toward the rear lower side of the percussion instrument 1 (direction toward the lower left in FIG. 7), with a configuration in which the fixing positions P1 and P2 of the support rubber 140 are on the lower side of the center of the striking surface, the striking force by the beater 162 is likely to act toward the fixing positions P1 and P2 of the support rubber 140. If the beater 162 strikes toward the fixing positions P1 and P2 of the support rubber 140, the percussion instrument 1 becomes less likely to swing with the support rubber 140 as a fulcrum, and a load is likely to apply to the fixing positions P1 and P2 of the support rubber 140.

[0088] In contrast, in the present embodiment, the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) is located on the upper side of the center of the striking surface. Accordingly, compared to the case where the fixing positions P1 and P2 of the support rubber 140 are located on the lower side of the center of the striking surface as described above, the percussion instrument 1 easily swings with the support rubber 140 as a fulcrum, and the load applied to the fixing positions P1 and P2 of the support rubber 140 can be reduced. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced, and damage to components at the fixing portions of the support rubber 140 can be suppressed.

[0089] Herein, to swingably support the percussion instrument 1 with respect to the stand 100, it is also possible to rotatably support the percussion instrument 1, for example, as in the case of a stand 200 (see FIG. 8) of a second embodiment (to be described later). However, in such a configuration, it is required to use components such as brackets 280 and sleeves 290a and 290b (see FIG. 9), and the number of components increases. In contrast, by fixing the frame 2 to the stand 100 (pedal support plate 110) via the support rubbers 140 as in the present embodiment, the percussion instrument 1 can be swingably supported with respect to the stand 100 while reducing the number of components.

[0090] In addition, in the case of swingably supporting the percussion instrument 1 using the support rubbers 140, it is also possible to fix the percussion instrument 1 to the fixing portion 121 (see FIG. 5) of the front leg 120 via the support rubbers 140, for example. In such a case, through holes for fixing the support rubbers 140 to the fixing portion 121 are provided in the pedal support plate 110. However, to stably fix the support rubbers 140 to the fixing portion 121 formed using a pipe, the fixing structure is prone to become complex.

[0091] In contrast, in the present embodiment, since the percussion instrument 1 is configured to be fixed to the front surface of the (flat plate-shaped) pedal support plate 110 formed using a metal plate via the support rubbers 140, the support rubbers 140 can be stably fixed utilizing the flat portion of the pedal support plate 110. Therefore, the percussion instrument 1 can be swingably supported with respect to the stand 100 while simplifying the fixing structure for the support rubbers 140.

[0092] In addition, it is also possible to vertically invert the support rubber 140 from the orientation shown in FIG. 7, and configure the fixing position P2 of the support rubber 140 with respect to the frame 2 to be on the lower side of the fixing position P1 of the support rubber 140 with respect to the pedal support plate 110. However, in such a configuration, since the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) with respect to the frame 2 is close to the striking position struck by the beater 162, a moment acting on the fixing position P2 due to such striking becomes small. Therefore, the percussion instrument 1 becomes less likely to swing (the percussion instrument 1 cannot be swung largely).

[0093] In contrast, in the present embodiment, the fixing position P2 of the support rubber 140 with respect to the frame 2 is located on the upper side of the fixing position P1 of the support rubber 140 with respect to the pedal support plate 110. That is, since the fixing position P2 is farther from the center of the striking surface compared to the fixing position P1, the moment acting on the fixing position P2 during striking by the beater 162 can be configured to be relatively large. Accordingly, since the percussion instrument 1 easily swings (the percussion instrument 1 can be swung largely), the impact of striking by the beater 162 is easily absorbed. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced. This is also the same in the case of fixing the percussion instrument 1 to the fixing portion 121 (see FIG. 5) of the front leg 120 described above via the support rubbers 140.

[0094] As described above, to reduce the vibration transmitted to the mounting surface S, the impact of striking is preferably absorbed by causing the percussion instrument 1 to swing relatively largely when being struck by the beater 162, but it is also important to attenuate the swinging of the percussion instrument 1 at an early stage.

[0095] Therefore, the present embodiment adopts a structure in which swinging of the percussion instrument 1 after striking is attenuated by buffer materials 170 and 171. The buffer materials 170 and 171 are formed using an elastic material having a predetermined flexibility. In the present embodiment, the buffer materials 170 and 171 are attached (adhered) to the pedal support plate 110, but the buffer materials 170 and 171 may also be attached to the back surface of the frame 2.

[0096] The buffer material 170 is sandwiched between the pedal support plate 110 and the back surface of the frame 2 on the upper side of the center of the striking surface, and the buffer material 171 is sandwiched between the pedal support plate 110 and the back surface of the frame 2 on the lower side of the center of the striking surface.

[0097] That is, the buffer materials 170 and 171 are provided as an upper and lower pair with the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) located therebetween in a side view. Therefore, upon start of swinging of the percussion instrument 1 due to striking by the beater 162, first, the buffer material 171 in contact with the back surface on the lower end side of the frame 2 is compressed, and the percussion instrument 1 is pushed back to an initial state by an elastic recovery force of the buffer material 171 accompanying the compression.

[0098] In the case where the percussion instrument 1 swings beyond the initial state due to the elastic recovery force of the buffer material 171, the buffer material 170 in contact with the back surface on the upper end side of the frame 2 is compressed, and the percussion instrument 1 is pushed back to the initial state by an elastic recovery force of the buffer material 170 accompanying the compression. With such alternating compression of the respective buffer materials 170 and 171, since the swinging of the percussion instrument 1 is attenuated at an early stage, the vibration transmitted to the mounting surface S can be effectively reduced.

[0099] Next, a stand 200 of a second embodiment will be described with reference to FIG. 8 to FIG. 10. The same portions as those in the first embodiment described above will be labeled with the same reference signs, and descriptions thereof will be omitted. First, an overall configuration of the stand 200 will be described with reference to FIG. 8. FIG. 8 is a rear perspective view of the stand 200 of the second embodiment.

[0100] As shown in FIG. 8, in the stand 200 of the second embodiment, a leg 220 is fixed to a back surface of a pedal support plate 210. The leg 220 mainly includes a fixing portion 221 that extends in the horizontal direction and is fixed to the back surface of the pedal support plate 210, and a pair of leg portions 222 configured to support both longitudinal ends of the fixing portion 221.

[0101] The fixing portion 221 is one metal pipe, and a lower pipe 223 protruding downward from a lower surface of the fixing portion 221 is welded to the fixing portion 221. The lower pipe 223 extending vertically is also fixed to the back surface of the pedal support plate 210.

[0102] The leg portion 222 is formed by bending a metal pipe, and by welding a bent portion of the leg portion 222 to the longitudinal end portion of the fixing portion 221, one end of the leg portion 222 descends and inclines forward from the fixing portion 221 and contacts the mounting surface on the front side of the pedal support plate 210. In addition, the other end of the leg portion 222 descends and inclines rearward from the fixing portion 221 and contacts the mounting surface. The pedal support plate 210 is supported on the mounting surface at four points by the pair of left and right leg portions 222.

[0103] A pedal fixing portion 111 configured to support a foot pedal 160 (see FIG. 10) is formed at the lower end portion of the pedal support plate 210, as in the first embodiment. During striking on the percussion instrument 1 by the foot pedal 160, the percussion instrument 1 rotates around the fixing portion 221 via brackets 280. Details of the structure for rotating the percussion instrument 1 will be described with reference to FIG. 9.

[0104] FIG. 9 is an exploded perspective view of the stand 200 showing a state in which the percussion instrument 1 is removed. In FIG. 9, among two sets of sleeves 290a and 290b mounted on the fixing portion 221, one set of sleeves 290a and 290b (sleeves located at the upper left in FIG. 9) is illustrated in a state of pinching the fixing portion 221, and the other set of sleeves 290a and 290b (sleeves located at the lower right in FIG. 9) is illustrated in a state of being removed from the fixing portion 221.

[0105] As shown in FIG. 9, the pedal support plate 210 is formed with through holes 213 for allowing rotation of the brackets 280. The through holes 213 are formed as a pair spaced apart in the horizontal direction, and the pair of through holes 213 are formed at positions facing the fixing portion 221.

[0106] The fixing portion 221 is formed with recesses 224 at positions facing the through holes 213. The recess 224 is an annular recess that is continuous over the entire circumference of the fixing portion 221, and the recess 224 is pinched by a pair of (split) sleeves 290a and 290b.

[0107] The sleeves 290a and 290b are members for reducing a rotational resistance of the bracket 280 with respect to the fixing portion 221. Since the sleeve 290a and the sleeve 290b have substantially the same configuration, the configuration of each portion of the sleeve 290a will be described below, and descriptions of the sleeve 290b will be omitted.

[0108] The sleeve 290a is formed in a semi-cylindrical shape using a synthetic resin having self-lubricating properties (for example, fluororesin, polyacetal, polyamide, or the like), and an inner protrusion 291 is formed on an inner circumferential surface of the sleeve 290a. The inner protrusion 291 is a protrusion extending along the circumferential direction of the inner circumferential surface of the sleeve 290a, and when the fixing portion 221 is to be pinched by the pair of sleeves 290a and 290b, the inner protrusion 291 is fitted into the recess 224. Accordingly, displacement of the sleeves 290a and 290b (bracket 280) along the longitudinal direction (axial direction) of the fixing portion 221 is restricted.

[0109] An outer protrusion 292 (protrusion) extending along the circumferential direction of the sleeve 290a is formed on an outer circumferential surface of the sleeve 290a, and displacement of the bracket 280 with respect to the sleeves 290a and 290b is restricted using the outer protrusion 292.

[0110] The bracket 280 is composed of a first bracket 281 fixed to the back surface of the frame 2 of the percussion instrument 1, and a second bracket 282 configured to sandwich the sleeves 290a and 290b together with the first bracket 281.

[0111] The first bracket 281 includes a fixed portion 281a fixed to the back surface of the frame 2. The fixed portion 281a extends in the horizontal direction and both ends of the fixed portion 281a are fixed to the frame 2 by bolts B5. A pair of upper and lower clamping portions 281b for clamping the sleeves 290a and 290b project from a central portion in the horizontal direction of the fixed portion 281a. The fixed portion 281a and the clamping portions 281b are integrally formed using a resin material.

[0112] With the pair of upper and lower clamping portions 281b projecting rearward from the fixed portion 281a, a clamping surface 281c for clamping the sleeves 290a and 290b is formed between the pair of clamping portions 281b. The clamping surface 281c is an arc-shaped curved surface extending along the outer circumferential surfaces of the sleeves 290a and 290b, and approximately half the circumference of the outer circumferential surfaces of the pair of sleeves 290a and 290b is sandwiched by the clamping surface 281c.

[0113] A fastening hole 281d is formed in each of the pair of upper and lower clamping portions 281b, and the second bracket 282 is fixed to the first bracket 281 using the fastening holes 281d. The second bracket 282 includes a clamping portion 282a configured to clamp the sleeves 290a and 290b, and fastened portions 282b configured to be fastened to the first bracket 281. Such portions 282a and 282b are integrally formed using a resin material.

[0114] The clamping portion 282a is formed with an arc-shaped clamping surface 282c extending along the outer circumferential surfaces of the sleeves 290a and 290b. The fastened portions 282b are formed as a pair on both upper and lower end sides of the clamping portion 282a, and an insertion hole 282d is formed in each of the pair of fastened portions 282b.

[0115] With the sleeves 290a and 290b sandwiched by the respective clamping surfaces 281c and 282c of the first bracket 281 and the second bracket 282, by fastening the bolts B6, which are inserted into the insertion holes 282d, to the fastening holes 281d, the sleeves 290a and 290b are clamped by the bracket 280. Accordingly, the percussion instrument 1 (frame 2) is rotatably supported by the fixing portion 221 via the brackets 280 and the sleeves 290a and 290b.

[0116] A recessed groove 281e (having a shape corresponding to the outer protrusion 292) extending along the circumferential direction of the clamping surface 281c is formed on the clamping surface 281c of the first bracket 281. The recessed groove 281e is a groove-shaped recess continuous along the circumferential direction of the clamping surface 281c. Although not illustrated, a similar recessed groove is also formed on the clamping surface 282c of the second bracket 282. By fitting the outer protrusions 292 of the sleeves 290a and 290b into the recessed grooves 281e of the respective brackets 281 and 282, displacement of the bracket 280 (percussion instrument 1) along the axial direction of the sleeves 290a and 290b (fixing portion 221) is restricted.

[0117] In the present embodiment, with the sleeves 290a and 290b firmly sandwiched by the respective brackets 281 and 282, relative rotation of the bracket 280 is not allowed with respect to the sleeves 290a and 290b, while relative rotation of the sleeves 290a and 290b is allowed with respect to the fixing portion 221, but the embodiment is not necessarily limited thereto.

[0118] For example, the sleeves 290a and 290b may also be configured to be fixed to the fixing portion 221 in a manner incapable of relatively rotating, while the bracket 280 may be configured to be relatively rotated with respect to the sleeves 290a and 290b. In addition, it is also possible to enable both relative rotations, including relative rotation of the sleeves 290a and 290b with respect to the fixing portion 221 and relative rotation of the bracket 280 with respect to the sleeves 290a and 290b.

[0119] In this manner, in the present embodiment, the percussion instrument 1 is rotatably (swingably) supported by the fixing portion 221 of the stand 200. A case where the percussion instrument 1 is struck by the foot pedal 160 will be described with reference to FIG. 10, and also with reference to FIG. 9 as appropriate.

[0120] FIG. 10 is a side view of the stand 200 showing a state in which the percussion instrument 1 is struck by the beater 162. In FIG. 10, one of the pair of leg portions 222 (close side in a direction perpendicular to the paper surface of FIG. 10) is omitted from illustration.

[0121] As shown in FIG. 10, with the foot pedal 160 supported by the pedal fixing portion 111 of the pedal support plate 210, by stepping on the pedal 161, the percussion instrument 1 is struck by the beater 162.

[0122] Since the frame 2 (housing) of the percussion instrument 1 is rotatably supported by the fixing portion 221 of the leg 220 via the brackets 280 and the sleeves 290a and 290b (see FIG. 9 for the sleeves), the percussion instrument 1 swings relatively with respect to the stand 200 (pedal support plate 210 and leg 220) during striking on the percussion instrument 1 by the beater 162. With such swinging of the percussion instrument 1, the impact of striking by the beater 162 can be absorbed. Therefore, the vibration transmitted to the mounting surface S via respective portions of the stand 200 (pedal support plate 210, leg 220, and the like) can be reduced during striking on the percussion instrument 1 by the beater 162.

[0123] With the center of the fixing portion 221 shown in FIG. 10 defined as a rotation center C2 of the percussion instrument 1, the rotation center C2 (swing fulcrum) is located at a height different from the center of the striking surface in the vertical direction. Accordingly, since the striking by the beater 162 can be received at a height different from the swing fulcrum of the percussion instrument 1, the percussion instrument 1 can easily swing relatively with respect to the stand 200. Therefore, since the impact of striking by the beater 162 can be easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0124] In addition, as in the first embodiment, since the direction of striking by the beater 162 is often a direction that descends and inclines toward the rear lower side of the percussion instrument 1 (direction toward the lower left in FIG. 10), in the present embodiment, the rotation center C2 of the percussion instrument 1 is similarly provided on the upper side of the center of the striking surface. Accordingly, compared to the case where the rotation center C2 is located on the lower side of the center of the striking surface, the percussion instrument 1 can easily rotate around the fixing portion 221, and the load applied to support portions (components such as the brackets 280) of the percussion instrument 1 can be reduced. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced, and damage to components in the support portions of the percussion instrument 1 can be suppressed.

[0125] In addition, in the present embodiment, buffer materials 170 and 171 similar to those in the first embodiment are also provided, and such buffer materials 170 and 171 are provided as a pair of upper and lower buffer materials 170 and 171 with the rotation center C2 of the percussion instrument 1 provided therebetween in a side view. Accordingly, as in the first embodiment, since the swinging of the percussion instrument 1 can be attenuated at an early stage by the buffer materials 170 and 171, the vibration transmitted to the mounting surface S can be effectively reduced.

[0126] In addition, according to the configuration in which the percussion instrument 1 is attached to be rotatable around the fixing portion 221 (rotation axis) as in the present embodiment, compared to the case where the percussion instrument 1 is swingably supported by the support rubbers 140 as in the first embodiment, the percussion instrument 1 can be smoothly swung. Therefore, since the impact of striking by the beater 162 can be easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0127] Herein, in the case of aiming to rotate the percussion instrument 1 more smoothly with respect to the stand 200, for example, it is also conceivable to use components such as bearings. An example thereof is a configuration in which a rolling bearing with a rolling element interposed between an inner ring and an outer ring is used, and the inner ring is fixed to the fixing portion 221 side while the outer ring is fixed to the frame 2 side. In the case of using such components as bearings, since the structure for attaching the bearing to the fixing portion 221 (stand 200) and the frame 2 (percussion instrument 1) becomes complicated, product cost increases.

[0128] In contrast, in the present embodiment, the brackets 280 are rotatably attached to the outer circumferential surface of the fixing portion 221 (cylindrical pipe), and the brackets 280 are fixed to the frame 2. Accordingly, the percussion instrument 1 can be rotatably supported utilizing the pipe itself that constitutes the stand 200. Therefore, product cost of the stand 200 can be reduced compared to the case where components such as bearings are used as described above.

[0129] In addition, in the case of aiming to rotatably support the percussion instrument 1 utilizing the fixing portion 221, for example, it is also possible to directly clamp the fixing portion 221 with the brackets 280. However, since the bracket 280 fixed to the frame 2 by fastening of the bolts B5 (see FIG. 9) needs to use a resin material having a relatively high rigidity, it is difficult to use a resin material having high self-lubricating properties. Therefore, with the configuration in which the fixing portion 221 is directly clamped by the brackets 280, it becomes difficult to both stably (firmly) fix the brackets 280 to the frame 2 and ensure sliding properties of the brackets 280 with respect to the fixing portion 221.

[0130] In contrast, in the present embodiment, the sleeves 290a and 290b formed using a resin material having higher self-lubricating properties than the bracket 280 are rotatably attached to the outer circumferential surface of the fixing portion 221, and such sleeves 290a and 290b are clamped by the bracket 280. Accordingly, even in the case where the bracket 280 is formed using a resin material having a relatively high rigidity, sliding properties with respect to the fixing portion 221 can be ensured by the sleeves 290a and 290b. Therefore, while enabling the frame 2 to be stably (firmly) fixed to the brackets 280, the percussion instrument 1 can be smoothly rotated with respect to the fixing portion 221.

[0131] In addition, when the percussion instrument 1 rotates with respect to the fixing portion 221, displacement of the sleeves 290a and 290b in the axial direction of the fixing portion 221 is restricted by the engagement between the recess 224 (see FIG. 9) formed on the outer circumferential surface of the fixing portion 221 and the inner protrusions 291 (see FIG. 9) formed on the inner circumferential surfaces of the sleeves 290a and 290b. Accordingly, processing cost of the fixing portion 221 (pipe) can be reduced compared to the case where, for example, a protrusion for restricting such displacement is formed on the outer circumferential surface of the fixing portion 221 (recesses that fit with the protrusion are formed in the sleeves 290a and 290b).

[0132] Next, a stand 300 of a third embodiment will be described with reference to FIG. 11 and FIG. 12. The same portions as those in the embodiments described above will be labeled with the same reference signs, and descriptions thereof will be omitted. FIG. 11 is a rear perspective view of the stand 300 of the third embodiment, and FIG. 12 is a side view of the stand 300 showing a state in which the percussion instrument 1 is struck by the beater 162. In FIG. 11, a buffer material 373 shown in FIG. 12 is omitted from illustration, and in FIG. 12, one of a pair of leg portions 222 (close side in the direction perpendicular to the paper surface of FIG. 12) is omitted from illustration.

[0133] As shown in FIG. 11, the stand 300 of the third embodiment includes U-shaped attaching plates 314 to which the percussion instrument 1 is attached. The attaching plate 314 includes: a first vertical portion 314a extending in the vertical direction (upward) from an upper end portion of a pedal support plate 310; a curved portion 314b curving forward from an upper end of the first vertical portion 314a; and a second vertical portion 314c extending in the vertical direction (downward) from a front end of the curved portion 314b. Such portions 314a to 314c are integrally formed using a metal plate.

[0134] The curved portion 314b has a curved shape that is convex upward, and the attaching plate 314 functions as a U-shaped leaf spring (U-shaped spring) mainly by elastic deformation of the curved portion 314b. The second vertical portion 314c extends downward from the first vertical portion 314a to face the pedal support plate 310, and the rear surface of the frame 2 is fixed to the second vertical portion 314c. The attaching plates 314 are provided as a pair spaced apart in the horizontal direction, and the percussion instrument 1 is attached to each of the pair of attaching plates 314.

[0135] As shown in FIG. 12, with the foot pedal 160 supported by the pedal fixing portion 111 of the pedal support plate 310, by stepping on the pedal 161, the percussion instrument 1 is struck by the beater 162.

[0136] Since the frame 2 (housing) of the percussion instrument 1 is swingably supported by the U-shaped attaching plates 314, during striking on the percussion instrument 1 by the beater 162, the percussion instrument 1 swings relatively with respect to the stand 300 (pedal support plate 310 and leg 220) by elastic deformation of the attaching plates 314. With such swinging of the percussion instrument 1, the impact of striking by the beater 162 can be absorbed. Therefore, during striking on the percussion instrument 1 by the beater 162, the vibration transmitted to the mounting surface S via respective portions of the stand 300 (pedal support plate 310, leg 220, and the like) can be reduced.

[0137] With the curved portion 314b of the attaching plate 314 defined as a swing fulcrum P3 of the percussion instrument 1, the swing fulcrum P3 is located at a height different from the center of the striking surface in the vertical direction. Accordingly, since the striking by the beater 162 can be received at a height different from the swing fulcrum P3 of the percussion instrument 1, the percussion instrument 1 can easily swing relatively with respect to the stand 300. Therefore, since the impact of striking by the beater 162 can be easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0138] In addition, as in the first embodiment, since the direction of striking by the beater 162 often becomes a direction that descends and inclines toward the rear lower side of the percussion instrument 1 (direction toward the lower left in FIG. 12), in the present embodiment, the swing fulcrum P3 of the percussion instrument 1 is also provided on the upper side of the center of the striking surface. Accordingly, compared to the case where the swing fulcrum P3 is located on the lower side of the center of the striking surface, the percussion instrument 1 can easily swing by elastic deformation of the attaching plates 314. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced.

[0139] A buffer material 373 for attenuating the swinging of the percussion instrument 1 is attached to the attaching plate 314. The buffer material 373 is formed using an elastic material having a predetermined flexibility. The buffer material 373 is sandwiched between the pedal support plate 310, the first vertical portion 314a, and the second vertical portion 314c. The buffer material 373 is adhered to the pedal support plate 310 and the first vertical portion 314a, but may also be adhered to the second vertical portion 314c. In addition, although illustration is omitted, the buffer material 373 is attached to each of the pair of left and right attaching plates 314.

[0140] With the buffer material 373 sandwiched between the pedal support plate 310 (first vertical portion 314a) and the percussion instrument 1 (second vertical portion 314c), the buffer material 373 is compressed by elastic deformation of the attaching plate 314 upon striking on the percussion instrument 1. Since the swinging of the percussion instrument 1 is attenuated by an elastic recovery force of the buffer material 373 resulting from such compression, the vibration transmitted to the mounting surface S can be effectively reduced.

[0141] In addition, by swingably supporting the percussion instrument 1 on the attaching plates 314 made of a U-shaped metal plate, the percussion instrument 1 can be swingably supported while it is not required to use components such as the brackets 280 and the sleeves 290a and 290b as in the second embodiment described above.

[0142] In this manner, in the case of swingably supporting the percussion instrument 1 by the attaching plates 314, it is also possible to fix the attaching plates 314 to, for example, the leg 220 (fixing portion 221) or the pedal support plate 310. In contrast, the attaching plates 314 of the present embodiment are formed integrally with the pedal support plate 310 made of a metal plate. Accordingly, the pedal support plate 310 and the attaching plates 314 can be formed by bending one metal plate. In addition, compared to the case where the pedal support plate 310 and the attaching plates 314 are configured as separate components, the number of components can be reduced.

[0143] Although descriptions have been provided based on the above embodiments, the present invention is not limited to the above embodiments in any aspect, and it can be easily inferred that various improvements and modifications are possible within the scope that does not depart from the spirit of the present invention.

[0144] In each of the above embodiments, it has been described that the percussion instrument 1 is an electronic percussion instrument including the head sensor 3, but, for example, the honeycomb structure with the recesses 20a and the through holes 20b on the bottom surface (support portion 20) of the frame 2, and the support structure for the percussion instrument using the stands 100, 200, and 300 are also applicable to acoustic percussion instruments (drums without sensors). In addition, as long as applicable to other percussion instruments (for example, a snare drum or a tam-tam) other than bass drums, each configuration described in each of the above embodiments may be applied to such other percussion instruments.

[0145] In each of the above embodiments, it has been described that the first cushion 5 and the second cushion 6, which are softer than the frame 2, are sandwiched between the support portion 20 and the head 4, but the embodiment is not necessarily limited thereto. For example, either one or both of the first cushion 5 and the second cushion 6 may be omitted. In the case of omitting either one of the first cushion 5 and the second cushion 6, the thickness of the other cushion is increased to contact the head 4.

[0146] In each of the above embodiments, it has been described that the first cushion 5 is a one-layer cushion and the second cushion 6 is a three-layer (multiple-layer) cushion, but the first cushion 5 may also be configured as multiple layers, or the second cushion 6 may also be configured as one layer.

[0147] In each of the above embodiments, it has been described that multiple vent holes 51 and 61 are formed in the first cushion 5 and the second cushion 6, but the embodiment is not necessarily limited thereto. For example, in either one or both of the first cushion 5 and the second cushion 6, the vent holes 51 and 61 may also be omitted.

[0148] Although descriptions have been omitted in each of the above embodiments, among the multiple vent holes 51 of the first cushion 5, at least some of the vent holes 51 may be formed at positions connecting with the vent holes 61 of the second cushion 6, or all of the vent holes 51 may be formed at positions connecting with the vent holes 61. In addition, all of the multiple vent holes 51 may be formed at positions that do not connect with the vent holes 61.

[0149] The same also applies to the vent holes 61 formed in each of the three layers of cushions constituting the second cushion 6, and among the multiple vent holes 61, at least some of the vent holes 61 may be formed at positions connecting with the vent holes 51 and 61 of other cushions (cushions stacked thereon), or all of the vent holes 61 may be formed at positions connecting with the vent holes 51 and 61 of other cushions. In addition, all of the multiple vent holes 61 may be formed at positions that do not connect with the vent holes 51 and 61 of other cushions.

[0150] That is, in the case of regarding the four stacked layers of cushions 5 and 6 (first elastic body and second elastic body) as one cushion (elastic body), the vent holes 51 and 61 may continuously connect, or may intermittently connect, the front surface (surface facing the head 4 side) and the back surface (surface facing the support portion 20 side) of such one cushion.

[0151] In each of the above embodiments, it has been described that the opening ratio of the vent holes 51 in the portion of the first cushion 5 that overlaps with the struck region R1 in the axial direction of the cylindrical portion 22 is lower than the opening ratio of the vent holes 51 in the portion that overlaps with the non-struck region in the axial direction of the cylindrical portion 22, but the embodiment is not necessarily limited thereto. For example, the opening ratio of the vent holes 51 in the portion of the first cushion 5 that overlaps with the struck region R1 in the axial direction of the cylindrical portion 22 may also be configured to be higher than the opening ratio of the vent holes 51 in the portion that overlaps with the non-struck region in the axial direction of the cylindrical portion 22 (or such opening ratios may also be configured to be the same).

[0152] In each of the above embodiments, it has been described that the hardness of the first cushion 5 is lower than the hardness of the second cushion 6, but the embodiment is not necessarily limited thereto. For example, the hardness of the first cushion 5 may also be higher than the hardness of the second cushion 6, or such hardnesses may also be the same.

[0153] In each of the above embodiments, it has been described that the opening ratio of the vent holes 51 in the first cushion 5 and the opening ratio of the vent holes 61 in the second cushion 6 are different from each other, that is, the opening ratio of the vent holes 51 with respect to the area of the first cushion 5 is smaller than the opening ratio of the vent holes 61 with respect to the area of the second cushion 6, but the embodiment is not necessarily limited thereto. For example, the opening ratio of the vent holes 51 with respect to the area of the first cushion 5 may also be larger than the opening ratio of the vent holes 61 with respect to the area of the second cushion 6, or such opening ratios may also be the same.

[0154] In each of the above embodiments, it has been described that the film member 7 having a lower coefficient of friction than the first and second cushions 5 and 6 is sandwiched between the first and second cushions 5 and 6 and between the support portion 20 and the second cushion 6, but the embodiment is not necessarily limited thereto. For example, it is also possible to omit the film member 7, and in the case of configuring the first cushion 5 (second cushion 6) from multiple layers of cushions as described above, the film member 7 may also be sandwiched between such cushions. In addition, the coefficient of friction of the film member 7 may also be higher than that of the first and second cushions 5 and 6.

[0155] In each of the above embodiments, it has been described that multiple recesses 20a and through holes 20b in a regular hexagonal shape are arranged on the bottom surface (support portion 20) of the frame 2 to fill the plane, but the embodiment is not necessarily limited thereto. For example, the shape of the recesses 20a and the through holes 20b may also be a regular triangle, a square, or another polygon (for example, parallelogram or any quadrilateral). In addition, recesses 20a and through holes 20b in shapes different from each other may fill the plane.

[0156] In each of the above embodiments, it has been described that the bottom wall 20c and the side wall 20d of the support portion 20 are integrally formed using a resin material, but the embodiment is not necessarily limited thereto. For example, a flat plate-shaped bottom wall 20c formed separately from the support portion 20 (side wall 20d) may be fixed to the support portion 20 (side wall 20d) by adhesion or the like.

[0157] In each of the above embodiments, it has been described that the entire bottom portion of the recess 20a is closed by the bottom wall 20c while the bottom wall 20c is not formed in the through hole 20b, but the embodiment is not necessarily limited thereto. For example, it is also possible to adopt a configuration in which a hole extending through a part of the bottom wall 20c of the recess 20a is formed (or a part of the bottom portion of the through hole 20b is closed), and even with such a configuration, it can be said that "the recess 20a (hole) extends through the support portion 20 (bottom surface of the housing)".

[0158] In each of the above embodiments, it has been described that the wall portion 82 is not formed in the region between the head sensor 3 and the struck region R1 (center C1 of the striking surface), but the embodiment is not necessarily limited thereto. For example, the wall portion 82 may also be configured to be formed in the region between the head sensor 3 and the struck region R1 (center C1 of the striking surface), such as a configuration in which the entire circumference of the head sensor 3 is surrounded by the wall portion 82.

[0159] In each of the above embodiments, it has been described that the wall portion 82 is formed in an arc shape centered on the center C1 of the head 4 (arc shape extending along the circumferential direction of the cylindrical portion 22), but the embodiment is not necessarily limited thereto. For example, a circular wall portion 82 surrounding the entire circumference of the head sensor 3 as described above may be formed, or the wall portion 82 may be formed in a polygonal shape (for example, a quadrilateral annular shape).

[0160] That is, as long as the configuration is capable of increasing the tension of the head 4 around the head sensor 3, the position at which the wall portion 82 is formed (a range to contact the head 4) and the shape may be appropriately set. Therefore, for example, as indicated by the virtual lines V in FIG. 4(a), it is also possible to bring the wall portion 82 extending toward the struck region R1 side into contact with the head 4, and the wall portion 82 may be formed at each of the positions indicated by the virtual lines V and the position indicated by the broken line in the same figure.

[0161] In each of the above embodiments, it has been described that a region R2 in which the height of the wall portion 82 is constant is present in the extending direction of the wall portion 82, but the embodiment is not necessarily limited thereto. For example, the height may also be configured to change over the entire wall portion 82 in the extending direction of the wall portion 82 (for example, the height gradually decreases as the wall portion 82 extends toward both ends in the extending direction of the wall portion 82), without a region R2 in which the height of the wall portion 82 is constant.

[0162] In each of the above embodiments, it has been described that the wall portion 82 is formed on the attaching member 8 which is detachably attached to the support portion 20, but the embodiment is not necessarily limited thereto. For example, the wall portion 82 may also be integrally formed with the support portion 20. In addition, although it has been described that the head sensor 3 is supported by the attaching member 8, the member configured to support the head sensor 3 and the member on which the wall portion 82 is formed may also be separate components. That is, the support portion 20 may support the head sensor 3 via the attaching member 8, or may directly support the head sensor 3 without the attaching member 8 therebetween.

[0163] In each of the above embodiments, it has been described that the fixing positions P1 and P2 of the support rubber 140 with respect to the pedal support plates 110, 210, and 310 and the frame 2, the rotation center C2 of the percussion instrument 1, and the swing fulcrum P3 of the percussion instrument 1 are configured to be located at heights different from the center of the striking surface in the vertical direction, that is, the swing fulcrum of the percussion instrument 1 is configured to be located on the upper side of the center of the striking surface, but the embodiment is not necessarily limited thereto. For example, the swing fulcrum of the percussion instrument 1 may also be located lower than the center of the striking surface, or the swing fulcrum of the percussion instrument 1 and the center of the striking surface may also be at the same height.

[0164] In each of the above embodiments, it has been described that the buffer materials 170, 171, and 373 are sandwiched between the pedal support plates 110, 210, and 310 and the percussion instrument 1, but the embodiment is not necessarily limited thereto. For example, in the first and third embodiments, the buffer materials 170, 171, and 373 may also be omitted (in the second embodiment, since the buffer materials 170 and 171 have the function of maintaining the initial state of the percussion instrument 1 before striking, the buffer materials 170 and 171 are preferably not omitted). In addition, the positions at which the buffer materials 170, 171, and 373 are attached may also be changed, or other buffer materials may also be added in addition to the buffer materials 170, 171, and 373.

[0165] In the first embodiment, it has been described that the percussion instrument 1 is fixed to the front surface of the pedal support plate 110 via the support rubbers 140, but the embodiment is not necessarily limited thereto. For example, the support rubbers 140 may also be fixed to the front leg 120 (fixing portion 121) or the rear leg 130 (fixing portion 131) of the stand 100. In that case, through holes in which the support rubbers 140 are capable of being disposed may be formed in the pedal support plate 110. In addition, in the case where members other than the pedal support plate 110 and the legs 120 and 130 are provided on the stand 100, the support rubbers 140 may also be fixed to such other members.

[0166] In the first embodiment, it has been described that the fixing position P2 of the support rubber 140 with respect to the frame 2 is configured to be located on the upper side of the fixing position P1 of the support rubber 140 with respect to the pedal support plate 110, that is, the fixing position P2 is farther from the center of the striking surface compared to the fixing position P1, but the embodiment is not necessarily limited thereto. For example, the fixing position P2 may also be configured to be closer to the center of the striking surface compared to the fixing position P1, such as a configuration in which the fixing position P2 is located lower than the fixing position P1.

[0167] In the second embodiment, it has been described that the brackets 280 are rotatably attached to the outer circumferential surface of the fixing portion 221 (cylindrical pipe), and such brackets 280 are fixed to the frame 2 (percussion instrument 1), but the embodiment is not necessarily limited thereto. For example, the percussion instrument 1 may also be rotatably supported on the stand 200 using conventional components (such as bearings) configured to support rotating members. In addition, in the second embodiment, it has been described that the sleeves 290a and 290b are interposed between the fixing portion 221 and the bracket 280, but the sleeves 290a and 290b may also be omitted, and the fixing portion 221 may also be directly clamped by the bracket 280.

[0168] In the second embodiment, it has been described that displacement of the sleeves 290a and 290b is restricted by the engagement between the recess 224 formed on the outer circumferential surface of the fixing portion 221 and the inner protrusions 291 formed on the inner circumferential surfaces of the sleeves 290a and 290b, but the embodiment is not necessarily limited thereto. For example, a protrusion configured to restrict displacement of the sleeves 290a and 290b may also be formed on the outer circumferential surface of the fixing portion 221, while recesses configured to fit with such a protrusion may be formed in the sleeves 290a and 290b.

[0169] In the third embodiment, it has been described that the attaching plates 314 are formed integrally with the pedal support plate 310 made of a metal plate, that is, the pedal support plate 310 and the attaching plates 314 are formed by bending one metal plate, but the embodiment is not necessarily limited thereto. For example, the attaching plates 314 and the pedal support plate 310 may also be separate components, and the attaching plates 314 may be fixed to the leg 220 (fixing portion 221) or the pedal support plate 310. In addition, in the case where members other than the pedal support plate 310 and the leg 220 (fixing portion 221) are provided on the stand 300, the attaching plates 314 may also be fixed to such other members.Reference Signs List

[0170] 1 percussion instrument 2 frame (housing) 20 support portion (bottom surface of housing) 20a recess (hole) 20b through hole (hole) 20c bottom wall 20d side wall 22 cylindrical portion 4 head 5 first cushion (first elastic body) (elastic body) 51 vent hole 6 second cushion (second elastic body) (elastic body) 61 vent hole 7 film member R1 struck region (first region)

Examples

second embodiment

[0100]As shown in FIG. 8, in the stand 200 of the second embodiment, a leg 220 is fixed to a back surface of a pedal support plate 210. The leg 220 mainly includes a fixing portion 221 that extends in the horizontal direction and is fixed to the back surface of the pedal support plate 210, and a pair of leg portions 222 configured to support both longitudinal ends of the fixing portion 221.

[0101]The fixing portion 221 is one metal pipe, and a lower pipe 223 protruding downward from a lower surface of the fixing portion 221 is welded to the fixing portion 221. The lower pipe 223 extending vertically is also fixed to the back surface of the pedal support plate 210.

[0102]The leg portion 222 is formed by bending a metal pipe, and by welding a bent portion of the leg portion 222 to the longitudinal end portion of the fixing portion 221, one end of the leg portion 222 descends and inclines forward from the fixing portion 221 and contacts the mounting surface on the front side of the pedal...

first embodiment

[0103]A pedal fixing portion 111 configured to support a foot pedal 160 (see FIG. 10) is formed at the lower end portion of the pedal support plate 210, as in the During striking on the percussion instrument 1 by the foot pedal 160, the percussion instrument 1 rotates around the fixing portion 221 via brackets 280. Details of the structure for rotating the percussion instrument 1 will be described with reference to FIG. 9.

[0104]FIG. 9 is an exploded perspective view of the stand 200 showing a state in which the percussion instrument 1 is removed. In FIG. 9, among two sets of sleeves 290a and 290b mounted on the fixing portion 221, one set of sleeves 290a and 290b (sleeves located at the upper left in FIG. 9) is illustrated in a state of pinching the fixing portion 221, and the other set of sleeves 290a and 290b (sleeves located at the lower right in FIG. 9) is illustrated in a state of being removed from the fixing portion 221.

[0105]As shown in FIG. 9, the pedal support plate 210 i...

third embodiment

[0133]As shown in FIG. 11, the stand 300 of the third embodiment includes U-shaped attaching plates 314 to which the percussion instrument 1 is attached. The attaching plate 314 includes: a first vertical portion 314a extending in the vertical direction (upward) from an upper end portion of a pedal support plate 310; a curved portion 314b curving forward from an upper end of the first vertical portion 314a; and a second vertical portion 314c extending in the vertical direction (downward) from a front end of the curved portion 314b. Such portions 314a to 314c are integrally formed using a metal plate.

[0134]The curved portion 314b has a curved shape that is convex upward, and the attaching plate 314 functions as a U-shaped leaf spring (U-shaped spring) mainly by elastic deformation of the curved portion 314b. The second vertical portion 314c extends downward from the first vertical portion 314a to face the pedal support plate 310, and the rear surface of the frame 2 is fixed to the se...

Technical Field

[0001] The present invention relates to a percussion instrument and a method for reinforcing a housing, and more particularly, to a percussion instrument and a method for reinforcing a housing capable of improving a rigidity of the housing while reducing a sound volume generated at the time of striking on a head.Background Art

[0002] For example, Patent Document 1 describes a technique of forming a substantially triangular opening at a connecting portion 4c of a sensor frame 4 constituting a bottom surface in a housing of a percussion instrument. Since multiple openings are formed in a circumferential direction of the sensor frame 4, vibration generated at the time of striking a head 5 is easily released to outside through the openings. Accordingly, since the vibration at the time of striking on the head 5 can be prevented from reverberating in the housing, a sound volume generated at the time of such striking can be reduced. In addition, a rib-shaped wall rising from the bottom surface of the sensor frame 4 is provided around the opening, and a rigidity of the sensor frame 4 can be ensured by such a wall.Related Art DocumentsPatent Documents

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-198657 (for example, paragraphs 0044, 0048, and 0051, FIG. 2)SUMMARY OF INVENTIONProblem to Be Solved by Invention

[0004] In this type of percussion instrument, there is a demand for a technique capable of more effectively improving the rigidity of a housing while reducing the sound volume generated at the time of striking on a head.

[0005] The present invention has been made to solve the above problem, and an objective thereof is to provide a percussion instrument and a method for reinforcing a housing capable of improving a rigidity of a housing while reducing a sound volume generated at the time of striking on a head.Means for Solving Problem

[0006] To achieve such an objective, a percussion instrument of the present invention includes: a head forming a striking surface; and a housing having a cylindrical portion in a cylindrical shape, the cylindrical portion having an opening portion to be covered with the head. The housing includes multiple holes in a polygonal shape formed on a bottom surface located on an inner circumferential side of the cylindrical portion and arranged such that sides of the holes are adjacent to each other. At least a part of the holes among the multiple holes extend through the bottom surface of the housing.

[0007] A method for reinforcing a housing of the present invention is a method for reinforcing a housing in a percussion instrument. The percussion instrument includes: a head forming a striking surface; and a housing having a cylindrical portion in a cylindrical shape, the cylindrical portion having an opening portion on one end side to be covered with the head. The method includes: forming multiple holes in a polygonal shape on a bottom surface of the housing located on an inner circumferential side of the cylindrical portion, the holes being arranged such that sides of the holes are adjacent to each other; and extending at least a part of the holes among the multiple holes through the bottom surface of the housing.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] [FIG. 1] is an exploded perspective view of a percussion instrument of a first embodiment. [FIG. 2] is a cross-sectional view of the percussion instrument. [FIG. 3] is a perspective view of a frame showing a state in which an attaching member is removed. [FIG. 4] (a) is a front view of the percussion instrument as viewed in a direction of an arrow IVa in FIG. 2, and (b) is a partially enlarged cross-sectional view of the percussion instrument taken along a line IVb-IVb in FIG. 4(a). [FIG. 5] is a rear perspective view of a stand showing a state in which the percussion instrument is removed. [FIG. 6] is a partially enlarged cross-sectional view of a pedal support plate and the frame showing a support structure provided by a support rubber. [FIG. 7] is a cross-sectional view of the stand showing a state in which the percussion instrument is struck by a beater. [FIG. 8] is a rear perspective view of a stand of a second embodiment. [FIG. 9] is an exploded perspective view of the stand showing a state in which the percussion instrument is removed. [FIG. 10] is a side view of the stand showing a state in which the percussion instrument is struck by a beater. [FIG. 11] is a rear perspective view of a stand of a third embodiment. [FIG. 12] is a side view of the stand showing a state in which the percussion instrument is struck by a beater. DESCRIPTION OF THE EMBODIMENTS

[0009] Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. First, with reference to FIG. 1, an overall configuration of a percussion instrument 1 of a first embodiment will be described. FIG. 1 is an exploded perspective view of the percussion instrument 1 of the first embodiment.

[0010] As shown in FIG. 1, the percussion instrument 1 is an electronic percussion instrument that simulates an acoustic bass drum, and includes a frame 2 that constitutes a housing of the percussion instrument 1. The frame 2 includes a substantially disc-shaped support portion 20 configured to support a head sensor 3, and an outer circumferential portion 21 in a cylindrical shape rises from an outer edge of the support portion 20.

[0011] A cylindrical portion 22 for stretching a head 4 is formed on an inner circumferential side of the outer circumferential portion 21, and such portions 20 to 22 of the frame 2 are integrally formed using a resin material. With the cylindrical portion 22 in a cylindrical shape rising from the support portion 20, a recessed groove 23 extending in a circumferential direction is formed between the outer circumferential portion 21 and the cylindrical portion 22.

[0012] On a bottom surface of the recessed groove 23 (a portion of the support portion 20 located between the outer circumferential portion 21 and the cylindrical portion 22), multiple (six in the present embodiment) female screw holes 23a are arranged at equal intervals in the circumferential direction, and a head frame 40 of the head 4 is attached using such female screw holes 23a.

[0013] The head 4 is formed in a disc shape using a mesh made of woven synthetic fibers, and a ring-shaped head frame 40 is fixed to an outer edge of the head 4. The head frame 40 is formed using a resin material, and the head 4 and the head frame 40 are integrally molded by die molding. The head frame 40 may also be formed using a material other than a resin (for example, a metal such as aluminum or iron), and the head frame 40 may also be joined to the head 4 by adhesion or the like.

[0014] Multiple insertion holes (not shown) are formed in the head frame 40 at positions corresponding to the female screw holes 23a of the frame 2, and bolts B1 are inserted into such insertion holes. With an opening portion of the cylindrical portion 22 covered with the head 4, by fastening the bolts B1 to the female screw holes 23a, the head frame 40 is pulled toward a bottom side of the recessed groove 23, and a tension is applied to the head 4 (see FIG. 2 for a state in which a tension is applied to the head 4).

[0015] With a tension applied to the head 4, the head sensor 3 contacts a back surface of the head 4, and vibration at the time of striking on the head 4 is detected by the head sensor 3. The head 4 of the percussion instrument 1 simulating a bass drum is struck by a beater 162 (see FIG. 7) of a foot pedal 160, and details of striking by the beater 162 will be described later.

[0016] Upon detection, by the head sensor 3, of striking on the head 4, a musical tone signal based on the detection result is generated by a sound source (not shown). By outputting the musical tone signal to an amplifier or a speaker (both not shown), an electronic musical tone is emitted from the speaker. Such an impact at the time of striking on the head 4 is absorbed by a first cushion 5 and a second cushion 6. Configurations of the cushions 5 and 6 will be described with reference to FIG. 1 and FIG. 2.

[0017] FIG. 2 is a cross-sectional view of the percussion instrument 1. FIG. 2 shows a cross-section taken along a plane that includes an axis (center) of the cylindrical portion 22 in a cylindrical shape and includes the head sensor 3.

[0018] As shown in FIG. 1 and FIG. 2, a first cushion 5 and a second cushion 6 are sequentially stacked on the frame 2 (support portion 20) of the percussion instrument 1 from the head 4 side. The cushions 5 and 6 are each formed in a disc shape having a diameter that is the same as (or slightly smaller than) an inner diameter of the cylindrical portion 22 of the frame 2. Through holes 50 and 60 for disposing the head sensor 3 are formed in the cushions 5 and 6. Such through holes 50 and 60 are formed in shapes corresponding to an attaching member 8 configured to support the head sensor 3, and details of the attaching member 8 will be described later with reference to FIG. 2 and FIG. 3.

[0019] A total thickness of the two cushions 5 and 6 is formed to be greater than a spacing between the support portion 20 of the frame 2 and the head 4. Therefore, the cushions 5 and 6 are stacked in a compressed state between the support portion 20 and the head 4. In FIG. 2, the second cushion 6 is shown as a one-layer cushion to simplify the drawing, but actually the second cushion 6 is composed of three layers of cushions.

[0020] The cushions 5 and 6 are each formed in a disc shape using a foamed synthetic resin of polyurethane foam. However, the cushions 5 and 6 may also be formed using a rubber, a resin such as an elastomer (synthetic resin), or a foamed material using such resins (hereinafter referred to as an "elastic material"), as long as the cushions 5 and 6 have a predetermined flexibility.

[0021] In the case of forming the cushions 5 and 6 from an elastic material such as a rubber or an elastomer (solid material that is not a foamed material), it is preferable to use an elastic material that exhibits a hardness of 10 or more and 50 or less measured with a durometer type A hardness meter in accordance with JIS K6253-3:2012. In addition, in the case of forming the cushions 5 and 6 from a foamed material (sponge) of a rubber, a synthetic resin, or the like, it is preferable to measure the hardness in accordance with JIS K6253-3:2012.

[0022] By sandwiching such cushions 5 and 6, which are softer than the frame 2, between the support portion 20 and the head 4, vibration (impact) at the time of striking the head 4 can be absorbed by the cushions 5 and 6. Therefore, a sound volume generated at the time of striking on the head 4 can be reduced. In addition, multiple vent holes 51 and 61 that connect a surface (surface facing the head 4 side) and a back surface (surface facing the support portion 20 side) of the cushions 5 and 6 are formed in the cushions 5 and 6. By forming such vent holes 51 and 61, since ventilation from the head 4 side toward the support portion 20 side can be ensured, the sound generated by vibration of the cushions 5 and 6 at the time of striking on the head 4 can be reduced. This can also reduce the sound volume generated at the time of striking on the head 4.

[0023] As a technique for sandwiching such cushions 5 and 6 between the support portion 20 of the frame 2 and the head 4, the technique of Japanese Patent Application Laid-Open No. 2001-142459 is known. In such a technique as well, the impact at the time of striking on a head (head member 11) can be absorbed by a cushion (impact absorbing member 22). However, in such a technique, since the cushion is one layer, the impact at the time of striking on the head concentrates on a part of the cushion (struck position) where the impact has no path to release. Therefore, there is a problem that the cushion is prone to be damaged.

[0024] In contrast, in the present embodiment, since the first cushion 5 disposed on the head 4 side and the second cushion 6 disposed on the support portion 20 side are stacked together, upon striking of the head 4, movements can be generated, such as the upper and lower cushions 5 and 6 contacting and separating from each other, and the cushions 5 and 6 sliding laterally. Accordingly, since the impact at the time of striking on the head 4 can be released between layers of the cushions 5 and 6, the cushions 5 and 6 become less likely to be damaged compared to the case where the cushion is one layer.

[0025] Similarly, since the second cushion 6 is composed of three layers of cushions, the impact at the time of striking on the head 4 can be released between the layers of the cushions constituting the second cushion 6. Therefore, the second cushion 6 becomes less likely to be damaged compared to the case where the second cushion 6 is one layer.

[0026] In addition, the hardness of the first cushion 5 (hardness in accordance with the above JIS standard) is lower than the hardness of the second cushion 6. That is, since the first cushion 5 is formed to be softer than the second cushion 6, the impact at the time of striking on the head 4 can be easily absorbed by the first cushion 5, while a striking feel at the time of striking can be easily provided by the relatively hard second cushion 6. Therefore, a striking feel similar to that of an acoustic drum can be obtained while reducing the sound generated at the time of striking on the head 4.

[0027] Herein, in the case where the head 4 is struck by the beater 162 (see FIG. 7), a center side of the head 4 is mainly struck, while an outer circumferential side of the head 4 is rarely struck. Therefore, in the following description, a region formed in the vicinity of the center of the head 4 and forming 30% or less of the area of the head 4 will be defined and described as a struck region (first region) (region indicated by R1 in FIG. 4), and a region on the outer circumferential side of the struck region will be defined and described as a non-struck region (second region).

[0028] In the case where the struck region of the head 4 is struck, the head 4 may bite into the vent holes 51 due to the striking. If the head 4 bites into the vent holes 51, cuts may be generated from edges of opening portions of the vent holes 51, and the first cushion 5 may become prone to be damaged.

[0029] In contrast, in the present embodiment, an opening ratio of the vent holes 51 in a portion (portion overlapping with the struck region in an axial view of the cylindrical portion 22) of the first cushion 5 corresponding to the struck region is lower than an opening ratio of the vent holes 51 in a portion (portion overlapping with the non-struck region in the axial view of the cylindrical portion 22) corresponding to the non-struck region. Accordingly, since striking can be received at the portion of the first cushion 5 where the opening ratio of the vent holes 51 is relatively low, concentration of a stress acting on the first cushion 5 due to the impact at the time of striking can be mitigated. Therefore, damage to the first cushion 5 can be suppressed.

[0030] In addition, in the present embodiment, the opening ratio of the vent holes 51 in the first cushion 5 and an opening ratio of the vent holes 61 in the second cushion 6 are set to values different from each other. More specifically, the areas of the cushions 5 and 6 are substantially the same, but the opening ratio (for example, 20% or more and less than 30%) of the vent holes 51 with respect to the area of the cushion 5 is lower than the opening ratio (for example, 30% or more and 40% or less) of the vent holes 61 with respect to the area of the cushion 6. That is, since the opening ratio of the vent holes 51 of the first cushion 5, which is substantially directly struck, is relatively small, biting of the head 4 into the vent holes 51 at the time of striking on the head 4 can be suppressed. Therefore, damage to the cushion 5 can be suppressed.

[0031] As shown in the enlarged portion at the lower right of FIG. 2, a film member 7 is sandwiched between the cushions 5 and 6. Although illustration is omitted, the film member 7 is formed with a through hole (having the same shape as the through holes 50 and 60 shown in FIG. 1) for passing the head sensor 3 (attaching member 8) therethrough.

[0032] The film member 7 is formed in a film shape using a mesh made of woven synthetic fibers. That is, since multiple vent holes (not shown) smaller than the vent holes 51 and 61 of the cushions 5 and 6 are formed in the film member 7, ventilation through the vent holes 51 and 61 of the cushions 5 and 6 can be prevented from being blocked by the film member 7. Accordingly, even in the case of laminating the film member 7 between the cushions 5 and 6, since ventilation between the layers of the cushions 5 and 6 can be ensured, the sound generated by vibration of the cushions 5 and 6 at the time of striking on the head 4 can be reduced.

[0033] In addition, by sandwiching the film member 7 between the cushions 5 and 6, at the time of striking on the head 4, biting into the vent holes 51 and 61 and compression (strong adhesion) of the cushions 5 and 6 to each other can be suppressed. Therefore, damage to the cushions 5 and 6 (particularly, the relatively soft first cushion 5) can be suppressed.

[0034] In addition, since the film member 7 is formed using a mesh made of woven synthetic fibers, the film member 7 has a lower coefficient of friction compared to the cushions 5 and 6. Accordingly, wearing of the cushions 5 and 6 (particularly, the relatively soft first cushion 5) due to rubbing against the film member 7 can be suppressed.

[0035] As shown in the enlarged portion at the upper right of FIG. 2, recesses 20a and through holes 20b are formed in the support portion 20, and the film member 7 is also laminated between the support portion 20 and the second cushion 6. As described above, since the film member 7 has ventilation properties (multiple vent holes smaller than the recesses 20a and the through holes 20b are formed), ventilation from the head 4 to the through holes 20b can be ensured. Therefore, since a part of the sound (vibration) generated at the time of striking on the head 4 can be released to outside, reverberation of such vibration within the frame 2 can be suppressed. Therefore, the sound volume generated at the time of striking on the head 4 can be reduced.

[0036] In addition, by laminating the film member 7 between the support portion 20 and the second cushion 6, biting of the cushion 6 into the recesses 20a and the through holes 20b at the time of striking on the head 4 can be suppressed. Therefore, damage to the cushion 6 can be suppressed.

[0037] Next, detailed configurations of the recesses 20a and the through holes 20b formed in the support portion 20 will be described with reference to FIG. 2 and FIG. 3. FIG. 3 is a perspective view of the frame 2 showing a state in which the attaching member 8 is removed.

[0038] As shown in FIG. 2 and FIG. 3, multiple recesses 20a and through holes 20b are formed in a portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22. The recess 20a is a hole recessed in the support portion 20, and the through hole 20b is a hole extending through the support portion 20 (see the enlarged portion at the upper right of FIG. 2 or FIG. 5 for illustration of the through hole 20b extending through the support portion 20). That is, the recess 20a has a bottom portion closed by a bottom wall 20c, while the through hole 20b extends through the support portion 20 without such a bottom wall 20c being formed.

[0039] The multiple recesses 20a and through holes 20b are formed in a polygonal shape (in the present embodiment, a regular hexagonal shape) arranged such that sides thereof are adjacent to each other. In other words, the multiple recesses 20a and through holes 20b are partitioned by side walls 20d, and the recess 20a and the through hole 20b are adjacent to each other with one side wall 20d interposed therebetween.

[0040] By forming such multiple recesses 20a and through holes 20b in the support portion 20, a part of the vibration (sound) at the time of striking the head 4 can be released to outside through the through holes 20b. Therefore, since reverberation of such vibration within the frame 2 can be suppressed, the sound volume at the time of striking on the head 4 can be reduced. In addition, a rigidity of the frame 2 (support portion 20) can be effectively improved by the bottom wall 20c (wall closing the hole) of the recess 20a and the side wall 20d partitioning the recess 20a and the through hole 20b.

[0041] In addition, multiple recesses 20a and through holes 20b having the same shape are arranged in the support portion 20 to fill the plane. Accordingly, the rigidity of the support portion 20 (bottom surface of the frame 2) can be uniformly enhanced throughout the entire support portion 20.

[0042] In the case of filling the plane in the support portion 20 with the recesses 20a and the through holes 20b, it is also possible to form the recesses 20a and the through holes 20b in an equilateral triangular shape, a square shape, or another polygonal shape (for example, parallelogram or any quadrilateral shape), but in the case of comparing among polygons having the same inscribed circle diameter, the recesses 20a and the through holes 20b are most preferably formed in a regular hexagonal shape as in the present embodiment. Accordingly, since the support portion 20 has a honeycomb structure, and the number of sides (side walls 20d) capable of dispersing an impact from lateral directions (adjacent recesses 20a and through holes 20b) is greater than in the case of other polygons, the rigidity of the support portion 20 (frame 2) can be effectively improved.

[0043] In addition, in the present embodiment, the recesses 20a and the through holes 20b are arranged without gaps therebetween in a region of 60% or more of an area in the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22. Accordingly, the rigidity of the frame 2 (support portion 20) can be effectively improved by the recesses 20a and the through holes 20b (bottom walls 20c and side walls 20d) while improving sound releasing properties through the through holes 20b.

[0044] The larger the area in which the recesses 20a and the through holes 20b are formed, the more the sound releasing properties and the rigidity of the support portion 20 can be improved. Therefore, the recesses 20a and the through holes 20b are more preferably formed in a region of 70% or more, and even more preferably formed in a region of 80% or more, of the area of the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22.

[0045] Herein, in the case of forming only the recesses 20a in the support portion 20 (closing all the through holes 20b to configure as recesses 20a), although the rigidity of the support portion 20 increases, the vibration at the time of striking on the head 4 is not released to outside. Therefore, quietness of the percussion instrument 1 decreases. On the other hand, in the case of forming only the through holes 20b in the support portion 20 (configuring all the recesses 20a as through holes 20b), the rigidity of the support portion 20 cannot be sufficiently improved, and most of the vibration at the time of striking on the head 4 is released from the through holes 20b, so the sound absorption effect of absorbing vibration reverberated within the frame 2 by the cushions 5 and 6 cannot be obtained at all, which is also unfavorable from the viewpoint of quietness of the percussion instrument 1.

[0046] Therefore, the opening ratio of the through holes 20b is preferably 15% or more and 35% or less, and more preferably 20% or more and 30% or less, of the area of the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22. By forming the through holes 20b at such an opening ratio, the rigidity of the support portion 20 (frame 2) can be effectively improved by the walls 20c and 20d constituting the recesses 20a and the through holes 20b while ensuring sound releasing properties through the through holes 20b.

[0047] In this manner, in the case of configuring the recesses 20a as recesses formed in the support portion 20 while configuring the through holes 20b as holes extending through the support portion 20, it is also possible to fix a flat plate-shaped bottom wall 20c formed separately from the support portion 20 (side wall 20d) to the support portion 20 (side wall 20d) by adhesion or the like, for example. However, with such a configuration, the rigidity of the frame 2 (support portion 20) cannot be sufficiently improved. In contrast, in the present embodiment, since the bottom wall 20c and the side wall 20d of the support portion 20 are integrally formed using a resin material, the rigidity of the support portion 20 (frame 2) can be effectively improved.

[0048] In addition, in the present embodiment, the entire bottom portion of the recess 20a is closed by the bottom wall 20c, while the bottom wall 20c is not formed in the through hole 20b, but it is also possible to adopt a configuration of forming a hole extending through a part of the bottom wall 20c of the recess 20a (or closing a part of the bottom portion of the through hole 20b), for example. However, with a configuration of forming a hole extending through a part of the bottom wall 20c of the recess 20a, the structure of the mold for resin-molding the frame 2 becomes complicated. That is, in the case of attempting to change the opening ratio of holes extending through the support portion 20, the design of the mold becomes complicated.

[0049] In contrast, with a configuration in which the entire bottom portion of the recess 20a is closed by the bottom wall 20c while the bottom wall 20c is not formed in the through hole 20b as in the present embodiment, the structure of the mold for resin-molding the frame 2 can be simplified. That is, for example, in the case of increasing the opening ratio of the through holes 20b in the support portion 20, it is only necessary to simply increase the number of through holes 20b to be formed (changing from the recesses 20a to the through holes 20b), so the design of the mold can be facilitated.

[0050] Next, a detailed configuration of the attaching member 8 to which the head sensor 3 is attached will be described below. The attaching member 8 includes a flat plate-shaped fixing portion 80 configured to be fixed to the support portion 20, attaching portions 81 in a columnar shape rising from the fixing portion 80 and configured for attaching the head sensor 3, and a wall portion 82 formed to surround the attaching portions. Such portions 80 to 82 are integrally formed using a resin material.

[0051] A pair of insertion holes 80a are formed at both end sides of the fixing portion 80 in the circumferential direction of the cylindrical portion 22, and female screw holes 20e (see FIG. 3) are formed in the support portion 20 at positions corresponding to the pair of insertion holes 80a. By fastening bolts B2, which are inserted into the insertion holes 80a, to the female screw holes 20e, the attaching member 8 is attached to the frame 2 (support portion 20).

[0052] A plate 9 configured to support the head sensor 3 is attached to the attaching portions 81 of the attaching member 8. The plate 9 is a substantially elliptical plate having a dimension in the circumferential direction of the cylindrical portion 22 (longitudinal direction of the plate 9) larger than a dimension in a radial direction (width direction). A pair of insertion holes 90 are formed at both end sides in the longitudinal direction of the plate 9. By fastening bolts B3, which are inserted into the pair of insertion holes 90, to the female screw holes of the attaching portions 81 of the attaching member 8, the plate 9 is attached to the attaching member 8. Accordingly, the head sensor 3 is supported by the attaching member 8 via the plate 9.

[0053] Since the attaching member 8 is attached at a position eccentric to the outer circumferential side (lower side) from the center of the support portion 20 (head 4), the head sensor 3 is also disposed at a position eccentric from the center of the support portion 20. This is to prevent the striking force of the beater 162 (see FIG. 7), which has a relatively large striking force, from being directly applied to the head sensor 3.

[0054] With the head sensor 3 attached to the attaching member 8 (see FIG. 2), the wall portion 82 in a wall shape rising from the fixing portion 80 is disposed around the head sensor 3. Since the wall portion 82 protrudes higher than the cylindrical portion 22 and contacts the head 4 (pushes up the head 4), the tension of the head 4 around the head sensor 3 can be increased. Accordingly, even in the case where the head sensor 3 is disposed at an eccentric position on the outer circumferential side of the head 4, vibration at the time of striking on the head 4 becomes easily detected by the head sensor 3. Therefore, the striking on the head 4 can be detected with high accuracy.

[0055] Next, with reference to FIG. 4, configurations of the head sensor 3 and the attaching member 8 will be further described. FIG. 4(a) is a front view of the percussion instrument 1 as viewed in the direction of an arrow IVa in FIG. 2, and FIG. 4(b) is a partially enlarged cross-sectional view of the percussion instrument 1 taken along a line IVb-IVb in FIG. 4(a). In FIG. 4(a), the head sensor 3 (cushion 32) and the wall portion 82 hidden by the head 4 are illustrated in broken lines, but for the wall portion 82, only the portion in contact with the head 4 is illustrated in broken lines.

[0056] As shown in FIG. 4, a disc-shaped sensor 31 (piezoelectric element) is adhered to an upper surface of the plate 9 (see FIG. 4(b)) by a double-sided tape 30 having cushioning properties, and a cushion 32 is adhered to an upper surface of such a sensor 31. The head sensor 3 is configured by the double-sided tape 30, the sensor 31, and the cushion 32.

[0057] The cushion 32 of the head sensor 3 is a buffer material in a columnar shape formed using a flexible material such as a sponge, a rubber, or a thermoplastic elastomer, and the cushion 32 contacts the head 4.

[0058] A region in the head 4 that is expected to receive striking by the beater 162 (see FIG. 7) will be defined as a struck region R1 (see FIG. 4(a)). As described above, the struck region R1 is a region formed in the vicinity of the center of the head 4 and is 30% or less of the area of the head 4.

[0059] In such a case, with a configuration in which the wall portion 82 is formed in a region between the struck region R1 and the head sensor 3, such as a configuration in which the wall portion 82 surrounds the entire circumference around the head sensor 3, vibration of the head 4 stretched in the region between the struck region R1 and the head sensor 3 becomes prone to be hindered by the wall portion 82 upon striking of the struck region R1. Therefore, the vibration at the time of striking on the struck region R1 cannot be sufficiently transmitted to the head sensor 3.

[0060] In contrast, in the present embodiment, the wall portion 82 is formed in a partial region around the head sensor 3, and the wall portion 82 is not formed in the region between the head sensor 3 and the struck region R1 (center C1 of the striking surface). Accordingly, since hindrance caused by the wall portion 82 to the vibration of the head 4 located between the struck region R1 and the head sensor 3 can be suppressed, the vibration at the time of striking on the head 4 (struck region R1) becomes easily detected by the head sensor 3. Therefore, the striking on the head 4 can be detected with high accuracy.

[0061] In this manner, to suppress hindrance caused by the wall portion 82 to the vibration of the head 4 located between the struck region R1 and the head sensor 3, for example, it is also possible to form the wall portion 82 at positions indicated by virtual lines V in FIG. 4(a). That is, as indicated by the virtual lines V, it is also possible to form a pair of wall portions 82 extending toward the struck region R1 side (extending in a radial direction) with the head sensor 3 interposed therebetween, to cause the pair of wall portions 82 to contact the head 4. However, in the case of forming the wall portions 82 at the positions indicated by the virtual lines V, since an end portion on the upper surface of the wall portion 82 (end portion located on the struck region R1 side) becomes prone to be stuck into the head 4 during vibration of the head 4, the head 4 becomes prone to be damaged.

[0062] In contrast, the wall portion 82 of the present embodiment is formed to extend in the circumferential direction of the cylindrical portion 22 in a region on a side opposite to the struck region R1 (center C1 of the head 4) with the head sensor 3 interposed therebetween. Accordingly, compared to the case of forming the wall portions 82 at the positions indicated by the virtual lines V, end portions on the upper surface of the wall portion 82 (both ends on the upper surface of the wall portion 82 in the circumferential direction of the cylindrical portion 22) can be prevented from being stuck into the head 4 during vibration of the head 4. Therefore, the vibration of the head 4 located between the struck region R1 and the head sensor 3 can be efficiently transmitted to the head sensor 3 while suppressing damage to the head 4.

[0063] In addition, when viewing the head 4 in a plan view, the wall portion 82 is formed in an arc shape centered on the center C1 of the head 4 (an arc shape extending along the circumferential direction of the cylindrical portion 22). That is, since the center C1 of the head 4 and the center of the wall portion 82 are concentric, the tension of the head 4 around the head sensor 3 can be uniformly increased. Therefore, the vibration at the time of striking on the head 4 can be detected with high accuracy by the head sensor 3. Furthermore, by forming the wall portion 82 in an arc shape, since concentration of the stress acting on the head 4 and the wall portion 82 at the time of striking can be mitigated, damage to the head 4 and the wall portion 82 can be suppressed.

[0064] In addition, as shown in FIG. 4(b), in an extending direction of the wall portion 82 (circumferential direction of the cylindrical portion 22), the head 4 mainly contacts in a region R2 in which the height of the wall portion 82 is constant. With both ends of the region R2 as boundaries, the height of the wall portion 82 (height from the fixing portion 80) is formed gradually lower. That is, since the height of the wall portion 82 is formed gradually lower at both end sides in the extending direction thereof, upper surfaces of the wall portion 82 at the both end portions have an R-shape. Accordingly, since both end portions on the upper surface of the wall portion 82 can be prevented from being stuck into the head 4 during vibration of the head 4, damage to the head 4 can be suppressed.

[0065] In addition, since the wall portion 82 is formed on the attaching member 8 which is detachably attached to the support portion 20, the height of the wall portion 82 can be easily adjusted by inserting a spacer or the like between the support portion 20 and the attaching member 8 to change an attaching height for the attaching member 8. Therefore, a contact pressure of the wall portion 82 against the head 4, that is, the tension of the head 4, can be easily adjusted.

[0066] Next, a configuration of a stand 100 configured to support the percussion instrument 1 will be described with reference to FIG. 5. FIG. 5 is a rear perspective view of the stand 100 showing a state in which the percussion instrument 1 is removed.

[0067] As shown in FIG. 5, the stand 100 is a member configured to support the percussion instrument 1, and is a member that constitutes a percussion instrument unit together with the percussion instrument 1. The stand 100 includes a pedal support plate 110 made of metal configured to support the percussion instrument 1. Such a pedal support plate 110 is a member configured to support a foot pedal 160 (see FIG. 7) to be described later. A front leg 120 and a rear leg 130 for mounting the stand 100 on a mounting surface are fixed on a rear surface of the pedal support plate 110 (surface opposite to a front surface to which the percussion instrument 1 is attached).

[0068] The front leg 120 includes a fixing portion 121 that extends in a horizontal direction and is fixed to the rear surface of the pedal support plate 110, and a pair of leg portions 122 that bend from both longitudinal ends of the fixing portion 121. Such portions 121 and 122 are formed by bending a metal pipe.

[0069] An upper pipe 123 that protrudes upward from an upper surface of the fixing portion 121 is welded to the fixing portion 121, and the upper pipe 123 extending vertically is also fixed to the rear surface of the pedal support plate 110. The pair of left and right leg portions 122 are inclined downward toward a front side from both ends of the fixing portion 121, and contact the mounting surface at a front side of the pedal support plate 110.

[0070] The rear leg 130 includes a fixing portion 131 that extends in the horizontal direction and is fixed to the rear surface of the pedal support plate 110, and a pair of leg portions 132 that bend from both longitudinal ends of the fixing portion 131. Such portions 131 and 132 are formed by bending a metal pipe.

[0071] Two lower pipes 133 that protrude downward from a lower surface of the fixing portion 131 are welded to the fixing portion 131, and the two lower pipes 133 extending vertically are also fixed to the rear surface of the pedal support plate 110. The pair of left and right leg portions 132 are inclined downward toward a rear side from both ends of the fixing portion 131 and contact the mounting surface.

[0072] The pedal support plate 110 is supported on the mounting surface at four points by the front and rear legs 120 and 130. A lower end portion of the pedal support plate 110 is bent toward the front side to form a pedal fixing portion 111, and a foot pedal 160 (see FIG. 7) is supported on the pedal fixing portion 111.

[0073] Attaching holes 112 are formed on an upper end side of the pedal support plate 110 (upper side of the fixing portion 121 of the front leg 120). The attaching holes 112 are formed as a pair spaced apart in the horizontal direction (with the upper pipe 123 interposed therebetween), and support rubbers 140 are fixed using the pair of attaching holes 112. A pair of attaching holes 20f for fixing the support rubbers 140 are formed on a rear surface of the support portion 20 (frame 2) of the percussion instrument 1. A support structure for the support portion 20 (frame 2) using such support rubbers 140 will be described with reference to FIG. 6. FIG. 6 is a partially enlarged cross-sectional view of the pedal support plate 110 and the frame 2 showing the support structure provided by the support rubber 140.

[0074] As shown in FIG. 6, the support rubber 140 includes a first cylindrical portion 141 in a cylindrical shape that is fixed to the pedal support plate 110 side, and a second cylindrical portion 142 that is fixed to the support portion 20 (frame 2) side. Such cylindrical portions 141 and 142 are integrally formed using a rubber.

[0075] An inner cylinder 150 is inserted into an insertion hole 141a on an inner circumferential side of the first cylindrical portion 141. The inner cylinder 150 is a metal cylindrical body, and a bolt B4 is inserted from one axial end (front end on a right side in FIG. 6) of the inner cylinder 150. By inserting the bolt B4 into the attaching hole 112 of the pedal support plate 110 and fastening to a nut N1, the support rubber 140 is fixed to the pedal support plate 110.

[0076] A length of the insertion hole 141a in an axial direction of the inner cylinder 150 is greater than a length of the inner cylinder 150 in the same direction. Therefore, with the bolt B4 fastened to the nut N1, the first cylindrical portion 141 is in a state compressed by the pedal support plate 110 and a head portion of the bolt B4. Accordingly, loosening of the bolt B4 and the nut N1 can be suppressed utilizing an elastic recovery force of the first cylindrical portion 141.

[0077] An inner cylinder 150 similar to that in the first cylindrical portion 141 is inserted into an insertion hole 142a on an inner circumferential side of the second cylindrical portion 142, and a bolt B4 is inserted from another axial end (rear end on a left side in FIG. 6) of the inner cylinder 150. By inserting the bolt B4 into the attaching hole 20f of the support portion 20 and fastening to a nut N1, the support portion 20 (frame 2) is fixed to the support rubber 140. Similarly, with the bolt B4 fastened to the nut N1, the second cylindrical portion 142 is in a state compressed by the support portion 20 and a head portion of the bolt B4. Therefore, loosening of the bolt B4 and the nut N1 can be suppressed utilizing an elastic recovery force of the second cylindrical portion 142.

[0078] In this manner, in the present embodiment, the percussion instrument 1 is swingably supported on the pedal support plate 110 of the stand 100 via the support rubbers 140. A case where the percussion instrument 1 is struck by the foot pedal 160 will be described with reference to FIG. 6 and FIG. 7. FIG. 7 is a cross-sectional view of the stand 100 showing a state in which the percussion instrument 1 is struck by the beater 162.

[0079] FIG. 7 illustrates a cross-section taken along a plane including a center of the stand 100 in the horizontal direction (left-right direction as viewed from a performer), that is, a center C1 (see FIG. 4) of the head 4 of the percussion instrument 1. In addition, in FIG. 7, to simplify the drawing, illustration of the cross-sectional structure of the percussion instrument 1 is omitted and hatching is applied, and the foot pedal 160 is illustrated in a side view rather than a cross-section.

[0080] As shown in FIG. 7, the foot pedal 160 is in a single pedal form that includes a pedal 161 configured to be stepped on by a performer, and a beater 162 configured to rotate due to stepping of the pedal 161.

[0081] With the foot pedal 160 supported on the pedal fixing portion 111 of the pedal support plate 110, by stepping on the pedal 161, the percussion instrument 1 is struck by the beater 162. A striking position struck by the beater 162 is within the struck region R1 of the head 4 described with reference to FIG. 4, that is, a position that substantially coincides with the center C1 of the head 4.

[0082] In the following description, the center C1 of the head 4 shown in FIG. 4 will be recited and described as a "center of the striking surface" and the like, and the striking on the struck region R1 of the head 4 by the beater 162 will be simply recited and described as "striking on the percussion instrument 1 by the beater 162" and the like.

[0083] As described above, since the frame 2 (housing) of the percussion instrument 1 is swingably supported on the pedal support plate 110 via the support rubbers 140, the percussion instrument 1 swings relatively with respect to the stand 100 (pedal support plate 110 and legs 120 and 130) when the percussion instrument 1 is struck by the beater 162. With such swinging, the impact of striking by the beater 162 can be absorbed. Therefore, vibration transmitted to the mounting surface S via the portions (pedal support plate 110 and legs 120 and 130) of the stand 100 can be reduced during striking on the percussion instrument 1 by the beater 162.

[0084] Herein, a point that is located on an axis of the bolt B4 shown in FIG. 6 and located on a plane including the front surface of the pedal support plate 110 will be defined as a fixing position P1 of the support rubber 140 with respect to the pedal support plate 110. Similarly, a point that is located on the axis of the bolt B4 and located on a plane including the rear surface of the support portion 20 (frame 2) will be described as a fixing position P2 of the support rubber 140 with respect to the frame 2.

[0085] As shown in FIG. 7, the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) with respect to the frame 2 is located at a height different from the center of the striking surface in the vertical direction. Accordingly, since the striking by the beater 162 can be received at a height different from the swing fulcrum of the percussion instrument 1, the percussion instrument 1 easily swings relatively with respect to the pedal support plate 110. Therefore, since the impact of striking by the beater 162 is easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0086] In this manner, in the case of aiming to configure the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) with respect to the frame 2 to be at a height different from the center of the striking surface, for example, it is also possible to configure the fixing positions P1 and P2 of the support rubber 140 to be on the lower side of the center of the striking surface.

[0087] However, since the direction of striking by the beater 162 is often a direction that descends and inclines toward the rear lower side of the percussion instrument 1 (direction toward the lower left in FIG. 7), with a configuration in which the fixing positions P1 and P2 of the support rubber 140 are on the lower side of the center of the striking surface, the striking force by the beater 162 is likely to act toward the fixing positions P1 and P2 of the support rubber 140. If the beater 162 strikes toward the fixing positions P1 and P2 of the support rubber 140, the percussion instrument 1 becomes less likely to swing with the support rubber 140 as a fulcrum, and a load is likely to apply to the fixing positions P1 and P2 of the support rubber 140.

[0088] In contrast, in the present embodiment, the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) is located on the upper side of the center of the striking surface. Accordingly, compared to the case where the fixing positions P1 and P2 of the support rubber 140 are located on the lower side of the center of the striking surface as described above, the percussion instrument 1 easily swings with the support rubber 140 as a fulcrum, and the load applied to the fixing positions P1 and P2 of the support rubber 140 can be reduced. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced, and damage to components at the fixing portions of the support rubber 140 can be suppressed.

[0089] Herein, to swingably support the percussion instrument 1 with respect to the stand 100, it is also possible to rotatably support the percussion instrument 1, for example, as in the case of a stand 200 (see FIG. 8) of a second embodiment (to be described later). However, in such a configuration, it is required to use components such as brackets 280 and sleeves 290a and 290b (see FIG. 9), and the number of components increases. In contrast, by fixing the frame 2 to the stand 100 (pedal support plate 110) via the support rubbers 140 as in the present embodiment, the percussion instrument 1 can be swingably supported with respect to the stand 100 while reducing the number of components.

[0090] In addition, in the case of swingably supporting the percussion instrument 1 using the support rubbers 140, it is also possible to fix the percussion instrument 1 to the fixing portion 121 (see FIG. 5) of the front leg 120 via the support rubbers 140, for example. In such a case, through holes for fixing the support rubbers 140 to the fixing portion 121 are provided in the pedal support plate 110. However, to stably fix the support rubbers 140 to the fixing portion 121 formed using a pipe, the fixing structure is prone to become complex.

[0091] In contrast, in the present embodiment, since the percussion instrument 1 is configured to be fixed to the front surface of the (flat plate-shaped) pedal support plate 110 formed using a metal plate via the support rubbers 140, the support rubbers 140 can be stably fixed utilizing the flat portion of the pedal support plate 110. Therefore, the percussion instrument 1 can be swingably supported with respect to the stand 100 while simplifying the fixing structure for the support rubbers 140.

[0092] In addition, it is also possible to vertically invert the support rubber 140 from the orientation shown in FIG. 7, and configure the fixing position P2 of the support rubber 140 with respect to the frame 2 to be on the lower side of the fixing position P1 of the support rubber 140 with respect to the pedal support plate 110. However, in such a configuration, since the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) with respect to the frame 2 is close to the striking position struck by the beater 162, a moment acting on the fixing position P2 due to such striking becomes small. Therefore, the percussion instrument 1 becomes less likely to swing (the percussion instrument 1 cannot be swung largely).

[0093] In contrast, in the present embodiment, the fixing position P2 of the support rubber 140 with respect to the frame 2 is located on the upper side of the fixing position P1 of the support rubber 140 with respect to the pedal support plate 110. That is, since the fixing position P2 is farther from the center of the striking surface compared to the fixing position P1, the moment acting on the fixing position P2 during striking by the beater 162 can be configured to be relatively large. Accordingly, since the percussion instrument 1 easily swings (the percussion instrument 1 can be swung largely), the impact of striking by the beater 162 is easily absorbed. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced. This is also the same in the case of fixing the percussion instrument 1 to the fixing portion 121 (see FIG. 5) of the front leg 120 described above via the support rubbers 140.

[0094] As described above, to reduce the vibration transmitted to the mounting surface S, the impact of striking is preferably absorbed by causing the percussion instrument 1 to swing relatively largely when being struck by the beater 162, but it is also important to attenuate the swinging of the percussion instrument 1 at an early stage.

[0095] Therefore, the present embodiment adopts a structure in which swinging of the percussion instrument 1 after striking is attenuated by buffer materials 170 and 171. The buffer materials 170 and 171 are formed using an elastic material having a predetermined flexibility. In the present embodiment, the buffer materials 170 and 171 are attached (adhered) to the pedal support plate 110, but the buffer materials 170 and 171 may also be attached to the back surface of the frame 2.

[0096] The buffer material 170 is sandwiched between the pedal support plate 110 and the back surface of the frame 2 on the upper side of the center of the striking surface, and the buffer material 171 is sandwiched between the pedal support plate 110 and the back surface of the frame 2 on the lower side of the center of the striking surface.

[0097] That is, the buffer materials 170 and 171 are provided as an upper and lower pair with the fixing position P2 of the support rubber 140 (swing fulcrum of the percussion instrument 1) located therebetween in a side view. Therefore, upon start of swinging of the percussion instrument 1 due to striking by the beater 162, first, the buffer material 171 in contact with the back surface on the lower end side of the frame 2 is compressed, and the percussion instrument 1 is pushed back to an initial state by an elastic recovery force of the buffer material 171 accompanying the compression.

[0098] In the case where the percussion instrument 1 swings beyond the initial state due to the elastic recovery force of the buffer material 171, the buffer material 170 in contact with the back surface on the upper end side of the frame 2 is compressed, and the percussion instrument 1 is pushed back to the initial state by an elastic recovery force of the buffer material 170 accompanying the compression. With such alternating compression of the respective buffer materials 170 and 171, since the swinging of the percussion instrument 1 is attenuated at an early stage, the vibration transmitted to the mounting surface S can be effectively reduced.

[0099] Next, a stand 200 of a second embodiment will be described with reference to FIG. 8 to FIG. 10. The same portions as those in the first embodiment described above will be labeled with the same reference signs, and descriptions thereof will be omitted. First, an overall configuration of the stand 200 will be described with reference to FIG. 8. FIG. 8 is a rear perspective view of the stand 200 of the second embodiment.

[0100] As shown in FIG. 8, in the stand 200 of the second embodiment, a leg 220 is fixed to a back surface of a pedal support plate 210. The leg 220 mainly includes a fixing portion 221 that extends in the horizontal direction and is fixed to the back surface of the pedal support plate 210, and a pair of leg portions 222 configured to support both longitudinal ends of the fixing portion 221.

[0101] The fixing portion 221 is one metal pipe, and a lower pipe 223 protruding downward from a lower surface of the fixing portion 221 is welded to the fixing portion 221. The lower pipe 223 extending vertically is also fixed to the back surface of the pedal support plate 210.

[0102] The leg portion 222 is formed by bending a metal pipe, and by welding a bent portion of the leg portion 222 to the longitudinal end portion of the fixing portion 221, one end of the leg portion 222 descends and inclines forward from the fixing portion 221 and contacts the mounting surface on the front side of the pedal support plate 210. In addition, the other end of the leg portion 222 descends and inclines rearward from the fixing portion 221 and contacts the mounting surface. The pedal support plate 210 is supported on the mounting surface at four points by the pair of left and right leg portions 222.

[0103] A pedal fixing portion 111 configured to support a foot pedal 160 (see FIG. 10) is formed at the lower end portion of the pedal support plate 210, as in the first embodiment. During striking on the percussion instrument 1 by the foot pedal 160, the percussion instrument 1 rotates around the fixing portion 221 via brackets 280. Details of the structure for rotating the percussion instrument 1 will be described with reference to FIG. 9.

[0104] FIG. 9 is an exploded perspective view of the stand 200 showing a state in which the percussion instrument 1 is removed. In FIG. 9, among two sets of sleeves 290a and 290b mounted on the fixing portion 221, one set of sleeves 290a and 290b (sleeves located at the upper left in FIG. 9) is illustrated in a state of pinching the fixing portion 221, and the other set of sleeves 290a and 290b (sleeves located at the lower right in FIG. 9) is illustrated in a state of being removed from the fixing portion 221.

[0105] As shown in FIG. 9, the pedal support plate 210 is formed with through holes 213 for allowing rotation of the brackets 280. The through holes 213 are formed as a pair spaced apart in the horizontal direction, and the pair of through holes 213 are formed at positions facing the fixing portion 221.

[0106] The fixing portion 221 is formed with recesses 224 at positions facing the through holes 213. The recess 224 is an annular recess that is continuous over the entire circumference of the fixing portion 221, and the recess 224 is pinched by a pair of (split) sleeves 290a and 290b.

[0107] The sleeves 290a and 290b are members for reducing a rotational resistance of the bracket 280 with respect to the fixing portion 221. Since the sleeve 290a and the sleeve 290b have substantially the same configuration, the configuration of each portion of the sleeve 290a will be described below, and descriptions of the sleeve 290b will be omitted.

[0108] The sleeve 290a is formed in a semi-cylindrical shape using a synthetic resin having self-lubricating properties (for example, fluororesin, polyacetal, polyamide, or the like), and an inner protrusion 291 is formed on an inner circumferential surface of the sleeve 290a. The inner protrusion 291 is a protrusion extending along the circumferential direction of the inner circumferential surface of the sleeve 290a, and when the fixing portion 221 is to be pinched by the pair of sleeves 290a and 290b, the inner protrusion 291 is fitted into the recess 224. Accordingly, displacement of the sleeves 290a and 290b (bracket 280) along the longitudinal direction (axial direction) of the fixing portion 221 is restricted.

[0109] An outer protrusion 292 (protrusion) extending along the circumferential direction of the sleeve 290a is formed on an outer circumferential surface of the sleeve 290a, and displacement of the bracket 280 with respect to the sleeves 290a and 290b is restricted using the outer protrusion 292.

[0110] The bracket 280 is composed of a first bracket 281 fixed to the back surface of the frame 2 of the percussion instrument 1, and a second bracket 282 configured to sandwich the sleeves 290a and 290b together with the first bracket 281.

[0111] The first bracket 281 includes a fixed portion 281a fixed to the back surface of the frame 2. The fixed portion 281a extends in the horizontal direction and both ends of the fixed portion 281a are fixed to the frame 2 by bolts B5. A pair of upper and lower clamping portions 281b for clamping the sleeves 290a and 290b project from a central portion in the horizontal direction of the fixed portion 281a. The fixed portion 281a and the clamping portions 281b are integrally formed using a resin material.

[0112] With the pair of upper and lower clamping portions 281b projecting rearward from the fixed portion 281a, a clamping surface 281c for clamping the sleeves 290a and 290b is formed between the pair of clamping portions 281b. The clamping surface 281c is an arc-shaped curved surface extending along the outer circumferential surfaces of the sleeves 290a and 290b, and approximately half the circumference of the outer circumferential surfaces of the pair of sleeves 290a and 290b is sandwiched by the clamping surface 281c.

[0113] A fastening hole 281d is formed in each of the pair of upper and lower clamping portions 281b, and the second bracket 282 is fixed to the first bracket 281 using the fastening holes 281d. The second bracket 282 includes a clamping portion 282a configured to clamp the sleeves 290a and 290b, and fastened portions 282b configured to be fastened to the first bracket 281. Such portions 282a and 282b are integrally formed using a resin material.

[0114] The clamping portion 282a is formed with an arc-shaped clamping surface 282c extending along the outer circumferential surfaces of the sleeves 290a and 290b. The fastened portions 282b are formed as a pair on both upper and lower end sides of the clamping portion 282a, and an insertion hole 282d is formed in each of the pair of fastened portions 282b.

[0115] With the sleeves 290a and 290b sandwiched by the respective clamping surfaces 281c and 282c of the first bracket 281 and the second bracket 282, by fastening the bolts B6, which are inserted into the insertion holes 282d, to the fastening holes 281d, the sleeves 290a and 290b are clamped by the bracket 280. Accordingly, the percussion instrument 1 (frame 2) is rotatably supported by the fixing portion 221 via the brackets 280 and the sleeves 290a and 290b.

[0116] A recessed groove 281e (having a shape corresponding to the outer protrusion 292) extending along the circumferential direction of the clamping surface 281c is formed on the clamping surface 281c of the first bracket 281. The recessed groove 281e is a groove-shaped recess continuous along the circumferential direction of the clamping surface 281c. Although not illustrated, a similar recessed groove is also formed on the clamping surface 282c of the second bracket 282. By fitting the outer protrusions 292 of the sleeves 290a and 290b into the recessed grooves 281e of the respective brackets 281 and 282, displacement of the bracket 280 (percussion instrument 1) along the axial direction of the sleeves 290a and 290b (fixing portion 221) is restricted.

[0117] In the present embodiment, with the sleeves 290a and 290b firmly sandwiched by the respective brackets 281 and 282, relative rotation of the bracket 280 is not allowed with respect to the sleeves 290a and 290b, while relative rotation of the sleeves 290a and 290b is allowed with respect to the fixing portion 221, but the embodiment is not necessarily limited thereto.

[0118] For example, the sleeves 290a and 290b may also be configured to be fixed to the fixing portion 221 in a manner incapable of relatively rotating, while the bracket 280 may be configured to be relatively rotated with respect to the sleeves 290a and 290b. In addition, it is also possible to enable both relative rotations, including relative rotation of the sleeves 290a and 290b with respect to the fixing portion 221 and relative rotation of the bracket 280 with respect to the sleeves 290a and 290b.

[0119] In this manner, in the present embodiment, the percussion instrument 1 is rotatably (swingably) supported by the fixing portion 221 of the stand 200. A case where the percussion instrument 1 is struck by the foot pedal 160 will be described with reference to FIG. 10, and also with reference to FIG. 9 as appropriate.

[0120] FIG. 10 is a side view of the stand 200 showing a state in which the percussion instrument 1 is struck by the beater 162. In FIG. 10, one of the pair of leg portions 222 (close side in a direction perpendicular to the paper surface of FIG. 10) is omitted from illustration.

[0121] As shown in FIG. 10, with the foot pedal 160 supported by the pedal fixing portion 111 of the pedal support plate 210, by stepping on the pedal 161, the percussion instrument 1 is struck by the beater 162.

[0122] Since the frame 2 (housing) of the percussion instrument 1 is rotatably supported by the fixing portion 221 of the leg 220 via the brackets 280 and the sleeves 290a and 290b (see FIG. 9 for the sleeves), the percussion instrument 1 swings relatively with respect to the stand 200 (pedal support plate 210 and leg 220) during striking on the percussion instrument 1 by the beater 162. With such swinging of the percussion instrument 1, the impact of striking by the beater 162 can be absorbed. Therefore, the vibration transmitted to the mounting surface S via respective portions of the stand 200 (pedal support plate 210, leg 220, and the like) can be reduced during striking on the percussion instrument 1 by the beater 162.

[0123] With the center of the fixing portion 221 shown in FIG. 10 defined as a rotation center C2 of the percussion instrument 1, the rotation center C2 (swing fulcrum) is located at a height different from the center of the striking surface in the vertical direction. Accordingly, since the striking by the beater 162 can be received at a height different from the swing fulcrum of the percussion instrument 1, the percussion instrument 1 can easily swing relatively with respect to the stand 200. Therefore, since the impact of striking by the beater 162 can be easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0124] In addition, as in the first embodiment, since the direction of striking by the beater 162 is often a direction that descends and inclines toward the rear lower side of the percussion instrument 1 (direction toward the lower left in FIG. 10), in the present embodiment, the rotation center C2 of the percussion instrument 1 is similarly provided on the upper side of the center of the striking surface. Accordingly, compared to the case where the rotation center C2 is located on the lower side of the center of the striking surface, the percussion instrument 1 can easily rotate around the fixing portion 221, and the load applied to support portions (components such as the brackets 280) of the percussion instrument 1 can be reduced. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced, and damage to components in the support portions of the percussion instrument 1 can be suppressed.

[0125] In addition, in the present embodiment, buffer materials 170 and 171 similar to those in the first embodiment are also provided, and such buffer materials 170 and 171 are provided as a pair of upper and lower buffer materials 170 and 171 with the rotation center C2 of the percussion instrument 1 provided therebetween in a side view. Accordingly, as in the first embodiment, since the swinging of the percussion instrument 1 can be attenuated at an early stage by the buffer materials 170 and 171, the vibration transmitted to the mounting surface S can be effectively reduced.

[0126] In addition, according to the configuration in which the percussion instrument 1 is attached to be rotatable around the fixing portion 221 (rotation axis) as in the present embodiment, compared to the case where the percussion instrument 1 is swingably supported by the support rubbers 140 as in the first embodiment, the percussion instrument 1 can be smoothly swung. Therefore, since the impact of striking by the beater 162 can be easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0127] Herein, in the case of aiming to rotate the percussion instrument 1 more smoothly with respect to the stand 200, for example, it is also conceivable to use components such as bearings. An example thereof is a configuration in which a rolling bearing with a rolling element interposed between an inner ring and an outer ring is used, and the inner ring is fixed to the fixing portion 221 side while the outer ring is fixed to the frame 2 side. In the case of using such components as bearings, since the structure for attaching the bearing to the fixing portion 221 (stand 200) and the frame 2 (percussion instrument 1) becomes complicated, product cost increases.

[0128] In contrast, in the present embodiment, the brackets 280 are rotatably attached to the outer circumferential surface of the fixing portion 221 (cylindrical pipe), and the brackets 280 are fixed to the frame 2. Accordingly, the percussion instrument 1 can be rotatably supported utilizing the pipe itself that constitutes the stand 200. Therefore, product cost of the stand 200 can be reduced compared to the case where components such as bearings are used as described above.

[0129] In addition, in the case of aiming to rotatably support the percussion instrument 1 utilizing the fixing portion 221, for example, it is also possible to directly clamp the fixing portion 221 with the brackets 280. However, since the bracket 280 fixed to the frame 2 by fastening of the bolts B5 (see FIG. 9) needs to use a resin material having a relatively high rigidity, it is difficult to use a resin material having high self-lubricating properties. Therefore, with the configuration in which the fixing portion 221 is directly clamped by the brackets 280, it becomes difficult to both stably (firmly) fix the brackets 280 to the frame 2 and ensure sliding properties of the brackets 280 with respect to the fixing portion 221.

[0130] In contrast, in the present embodiment, the sleeves 290a and 290b formed using a resin material having higher self-lubricating properties than the bracket 280 are rotatably attached to the outer circumferential surface of the fixing portion 221, and such sleeves 290a and 290b are clamped by the bracket 280. Accordingly, even in the case where the bracket 280 is formed using a resin material having a relatively high rigidity, sliding properties with respect to the fixing portion 221 can be ensured by the sleeves 290a and 290b. Therefore, while enabling the frame 2 to be stably (firmly) fixed to the brackets 280, the percussion instrument 1 can be smoothly rotated with respect to the fixing portion 221.

[0131] In addition, when the percussion instrument 1 rotates with respect to the fixing portion 221, displacement of the sleeves 290a and 290b in the axial direction of the fixing portion 221 is restricted by the engagement between the recess 224 (see FIG. 9) formed on the outer circumferential surface of the fixing portion 221 and the inner protrusions 291 (see FIG. 9) formed on the inner circumferential surfaces of the sleeves 290a and 290b. Accordingly, processing cost of the fixing portion 221 (pipe) can be reduced compared to the case where, for example, a protrusion for restricting such displacement is formed on the outer circumferential surface of the fixing portion 221 (recesses that fit with the protrusion are formed in the sleeves 290a and 290b).

[0132] Next, a stand 300 of a third embodiment will be described with reference to FIG. 11 and FIG. 12. The same portions as those in the embodiments described above will be labeled with the same reference signs, and descriptions thereof will be omitted. FIG. 11 is a rear perspective view of the stand 300 of the third embodiment, and FIG. 12 is a side view of the stand 300 showing a state in which the percussion instrument 1 is struck by the beater 162. In FIG. 11, a buffer material 373 shown in FIG. 12 is omitted from illustration, and in FIG. 12, one of a pair of leg portions 222 (close side in the direction perpendicular to the paper surface of FIG. 12) is omitted from illustration.

[0133] As shown in FIG. 11, the stand 300 of the third embodiment includes U-shaped attaching plates 314 to which the percussion instrument 1 is attached. The attaching plate 314 includes: a first vertical portion 314a extending in the vertical direction (upward) from an upper end portion of a pedal support plate 310; a curved portion 314b curving forward from an upper end of the first vertical portion 314a; and a second vertical portion 314c extending in the vertical direction (downward) from a front end of the curved portion 314b. Such portions 314a to 314c are integrally formed using a metal plate.

[0134] The curved portion 314b has a curved shape that is convex upward, and the attaching plate 314 functions as a U-shaped leaf spring (U-shaped spring) mainly by elastic deformation of the curved portion 314b. The second vertical portion 314c extends downward from the first vertical portion 314a to face the pedal support plate 310, and the rear surface of the frame 2 is fixed to the second vertical portion 314c. The attaching plates 314 are provided as a pair spaced apart in the horizontal direction, and the percussion instrument 1 is attached to each of the pair of attaching plates 314.

[0135] As shown in FIG. 12, with the foot pedal 160 supported by the pedal fixing portion 111 of the pedal support plate 310, by stepping on the pedal 161, the percussion instrument 1 is struck by the beater 162.

[0136] Since the frame 2 (housing) of the percussion instrument 1 is swingably supported by the U-shaped attaching plates 314, during striking on the percussion instrument 1 by the beater 162, the percussion instrument 1 swings relatively with respect to the stand 300 (pedal support plate 310 and leg 220) by elastic deformation of the attaching plates 314. With such swinging of the percussion instrument 1, the impact of striking by the beater 162 can be absorbed. Therefore, during striking on the percussion instrument 1 by the beater 162, the vibration transmitted to the mounting surface S via respective portions of the stand 300 (pedal support plate 310, leg 220, and the like) can be reduced.

[0137] With the curved portion 314b of the attaching plate 314 defined as a swing fulcrum P3 of the percussion instrument 1, the swing fulcrum P3 is located at a height different from the center of the striking surface in the vertical direction. Accordingly, since the striking by the beater 162 can be received at a height different from the swing fulcrum P3 of the percussion instrument 1, the percussion instrument 1 can easily swing relatively with respect to the stand 300. Therefore, since the impact of striking by the beater 162 can be easily absorbed, the vibration transmitted to the mounting surface S can be effectively reduced.

[0138] In addition, as in the first embodiment, since the direction of striking by the beater 162 often becomes a direction that descends and inclines toward the rear lower side of the percussion instrument 1 (direction toward the lower left in FIG. 12), in the present embodiment, the swing fulcrum P3 of the percussion instrument 1 is also provided on the upper side of the center of the striking surface. Accordingly, compared to the case where the swing fulcrum P3 is located on the lower side of the center of the striking surface, the percussion instrument 1 can easily swing by elastic deformation of the attaching plates 314. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced.

[0139] A buffer material 373 for attenuating the swinging of the percussion instrument 1 is attached to the attaching plate 314. The buffer material 373 is formed using an elastic material having a predetermined flexibility. The buffer material 373 is sandwiched between the pedal support plate 310, the first vertical portion 314a, and the second vertical portion 314c. The buffer material 373 is adhered to the pedal support plate 310 and the first vertical portion 314a, but may also be adhered to the second vertical portion 314c. In addition, although illustration is omitted, the buffer material 373 is attached to each of the pair of left and right attaching plates 314.

[0140] With the buffer material 373 sandwiched between the pedal support plate 310 (first vertical portion 314a) and the percussion instrument 1 (second vertical portion 314c), the buffer material 373 is compressed by elastic deformation of the attaching plate 314 upon striking on the percussion instrument 1. Since the swinging of the percussion instrument 1 is attenuated by an elastic recovery force of the buffer material 373 resulting from such compression, the vibration transmitted to the mounting surface S can be effectively reduced.

[0141] In addition, by swingably supporting the percussion instrument 1 on the attaching plates 314 made of a U-shaped metal plate, the percussion instrument 1 can be swingably supported while it is not required to use components such as the brackets 280 and the sleeves 290a and 290b as in the second embodiment described above.

[0142] In this manner, in the case of swingably supporting the percussion instrument 1 by the attaching plates 314, it is also possible to fix the attaching plates 314 to, for example, the leg 220 (fixing portion 221) or the pedal support plate 310. In contrast, the attaching plates 314 of the present embodiment are formed integrally with the pedal support plate 310 made of a metal plate. Accordingly, the pedal support plate 310 and the attaching plates 314 can be formed by bending one metal plate. In addition, compared to the case where the pedal support plate 310 and the attaching plates 314 are configured as separate components, the number of components can be reduced.

[0143] Although descriptions have been provided based on the above embodiments, the present invention is not limited to the above embodiments in any aspect, and it can be easily inferred that various improvements and modifications are possible within the scope that does not depart from the spirit of the present invention.

[0144] In each of the above embodiments, it has been described that the percussion instrument 1 is an electronic percussion instrument including the head sensor 3, but, for example, the honeycomb structure with the recesses 20a and the through holes 20b on the bottom surface (support portion 20) of the frame 2, and the support structure for the percussion instrument using the stands 100, 200, and 300 are also applicable to acoustic percussion instruments (drums without sensors). In addition, as long as applicable to other percussion instruments (for example, a snare drum or a tam-tam) other than bass drums, each configuration described in each of the above embodiments may be applied to such other percussion instruments.

[0145] In each of the above embodiments, it has been described that the first cushion 5 and the second cushion 6, which are softer than the frame 2, are sandwiched between the support portion 20 and the head 4, but the embodiment is not necessarily limited thereto. For example, either one or both of the first cushion 5 and the second cushion 6 may be omitted. In the case of omitting either one of the first cushion 5 and the second cushion 6, the thickness of the other cushion is increased to contact the head 4.

[0146] In each of the above embodiments, it has been described that the first cushion 5 is a one-layer cushion and the second cushion 6 is a three-layer (multiple-layer) cushion, but the first cushion 5 may also be configured as multiple layers, or the second cushion 6 may also be configured as one layer.

[0147] In each of the above embodiments, it has been described that multiple vent holes 51 and 61 are formed in the first cushion 5 and the second cushion 6, but the embodiment is not necessarily limited thereto. For example, in either one or both of the first cushion 5 and the second cushion 6, the vent holes 51 and 61 may also be omitted.

[0148] Although descriptions have been omitted in each of the above embodiments, among the multiple vent holes 51 of the first cushion 5, at least some of the vent holes 51 may be formed at positions connecting with the vent holes 61 of the second cushion 6, or all of the vent holes 51 may be formed at positions connecting with the vent holes 61. In addition, all of the multiple vent holes 51 may be formed at positions that do not connect with the vent holes 61.

[0149] The same also applies to the vent holes 61 formed in each of the three layers of cushions constituting the second cushion 6, and among the multiple vent holes 61, at least some of the vent holes 61 may be formed at positions connecting with the vent holes 51 and 61 of other cushions (cushions stacked thereon), or all of the vent holes 61 may be formed at positions connecting with the vent holes 51 and 61 of other cushions. In addition, all of the multiple vent holes 61 may be formed at positions that do not connect with the vent holes 51 and 61 of other cushions.

[0150] That is, in the case of regarding the four stacked layers of cushions 5 and 6 (first elastic body and second elastic body) as one cushion (elastic body), the vent holes 51 and 61 may continuously connect, or may intermittently connect, the front surface (surface facing the head 4 side) and the back surface (surface facing the support portion 20 side) of such one cushion.

[0151] In each of the above embodiments, it has been described that the opening ratio of the vent holes 51 in the portion of the first cushion 5 that overlaps with the struck region R1 in the axial direction of the cylindrical portion 22 is lower than the opening ratio of the vent holes 51 in the portion that overlaps with the non-struck region in the axial direction of the cylindrical portion 22, but the embodiment is not necessarily limited thereto. For example, the opening ratio of the vent holes 51 in the portion of the first cushion 5 that overlaps with the struck region R1 in the axial direction of the cylindrical portion 22 may also be configured to be higher than the opening ratio of the vent holes 51 in the portion that overlaps with the non-struck region in the axial direction of the cylindrical portion 22 (or such opening ratios may also be configured to be the same).

[0152] In each of the above embodiments, it has been described that the hardness of the first cushion 5 is lower than the hardness of the second cushion 6, but the embodiment is not necessarily limited thereto. For example, the hardness of the first cushion 5 may also be higher than the hardness of the second cushion 6, or such hardnesses may also be the same.

[0153] In each of the above embodiments, it has been described that the opening ratio of the vent holes 51 in the first cushion 5 and the opening ratio of the vent holes 61 in the second cushion 6 are different from each other, that is, the opening ratio of the vent holes 51 with respect to the area of the first cushion 5 is smaller than the opening ratio of the vent holes 61 with respect to the area of the second cushion 6, but the embodiment is not necessarily limited thereto. For example, the opening ratio of the vent holes 51 with respect to the area of the first cushion 5 may also be larger than the opening ratio of the vent holes 61 with respect to the area of the second cushion 6, or such opening ratios may also be the same.

[0154] In each of the above embodiments, it has been described that the film member 7 having a lower coefficient of friction than the first and second cushions 5 and 6 is sandwiched between the first and second cushions 5 and 6 and between the support portion 20 and the second cushion 6, but the embodiment is not necessarily limited thereto. For example, it is also possible to omit the film member 7, and in the case of configuring the first cushion 5 (second cushion 6) from multiple layers of cushions as described above, the film member 7 may also be sandwiched between such cushions. In addition, the coefficient of friction of the film member 7 may also be higher than that of the first and second cushions 5 and 6.

[0155] In each of the above embodiments, it has been described that multiple recesses 20a and through holes 20b in a regular hexagonal shape are arranged on the bottom surface (support portion 20) of the frame 2 to fill the plane, but the embodiment is not necessarily limited thereto. For example, the shape of the recesses 20a and the through holes 20b may also be a regular triangle, a square, or another polygon (for example, parallelogram or any quadrilateral). In addition, recesses 20a and through holes 20b in shapes different from each other may fill the plane.

[0156] In each of the above embodiments, it has been described that the bottom wall 20c and the side wall 20d of the support portion 20 are integrally formed using a resin material, but the embodiment is not necessarily limited thereto. For example, a flat plate-shaped bottom wall 20c formed separately from the support portion 20 (side wall 20d) may be fixed to the support portion 20 (side wall 20d) by adhesion or the like.

[0157] In each of the above embodiments, it has been described that the entire bottom portion of the recess 20a is closed by the bottom wall 20c while the bottom wall 20c is not formed in the through hole 20b, but the embodiment is not necessarily limited thereto. For example, it is also possible to adopt a configuration in which a hole extending through a part of the bottom wall 20c of the recess 20a is formed (or a part of the bottom portion of the through hole 20b is closed), and even with such a configuration, it can be said that "the recess 20a (hole) extends through the support portion 20 (bottom surface of the housing)".

[0158] In each of the above embodiments, it has been described that the wall portion 82 is not formed in the region between the head sensor 3 and the struck region R1 (center C1 of the striking surface), but the embodiment is not necessarily limited thereto. For example, the wall portion 82 may also be configured to be formed in the region between the head sensor 3 and the struck region R1 (center C1 of the striking surface), such as a configuration in which the entire circumference of the head sensor 3 is surrounded by the wall portion 82.

[0159] In each of the above embodiments, it has been described that the wall portion 82 is formed in an arc shape centered on the center C1 of the head 4 (arc shape extending along the circumferential direction of the cylindrical portion 22), but the embodiment is not necessarily limited thereto. For example, a circular wall portion 82 surrounding the entire circumference of the head sensor 3 as described above may be formed, or the wall portion 82 may be formed in a polygonal shape (for example, a quadrilateral annular shape).

[0160] That is, as long as the configuration is capable of increasing the tension of the head 4 around the head sensor 3, the position at which the wall portion 82 is formed (a range to contact the head 4) and the shape may be appropriately set. Therefore, for example, as indicated by the virtual lines V in FIG. 4(a), it is also possible to bring the wall portion 82 extending toward the struck region R1 side into contact with the head 4, and the wall portion 82 may be formed at each of the positions indicated by the virtual lines V and the position indicated by the broken line in the same figure.

[0161] In each of the above embodiments, it has been described that a region R2 in which the height of the wall portion 82 is constant is present in the extending direction of the wall portion 82, but the embodiment is not necessarily limited thereto. For example, the height may also be configured to change over the entire wall portion 82 in the extending direction of the wall portion 82 (for example, the height gradually decreases as the wall portion 82 extends toward both ends in the extending direction of the wall portion 82), without a region R2 in which the height of the wall portion 82 is constant.

[0162] In each of the above embodiments, it has been described that the wall portion 82 is formed on the attaching member 8 which is detachably attached to the support portion 20, but the embodiment is not necessarily limited thereto. For example, the wall portion 82 may also be integrally formed with the support portion 20. In addition, although it has been described that the head sensor 3 is supported by the attaching member 8, the member configured to support the head sensor 3 and the member on which the wall portion 82 is formed may also be separate components. That is, the support portion 20 may support the head sensor 3 via the attaching member 8, or may directly support the head sensor 3 without the attaching member 8 therebetween.

[0163] In each of the above embodiments, it has been described that the fixing positions P1 and P2 of the support rubber 140 with respect to the pedal support plates 110, 210, and 310 and the frame 2, the rotation center C2 of the percussion instrument 1, and the swing fulcrum P3 of the percussion instrument 1 are configured to be located at heights different from the center of the striking surface in the vertical direction, that is, the swing fulcrum of the percussion instrument 1 is configured to be located on the upper side of the center of the striking surface, but the embodiment is not necessarily limited thereto. For example, the swing fulcrum of the percussion instrument 1 may also be located lower than the center of the striking surface, or the swing fulcrum of the percussion instrument 1 and the center of the striking surface may also be at the same height.

[0164] In each of the above embodiments, it has been described that the buffer materials 170, 171, and 373 are sandwiched between the pedal support plates 110, 210, and 310 and the percussion instrument 1, but the embodiment is not necessarily limited thereto. For example, in the first and third embodiments, the buffer materials 170, 171, and 373 may also be omitted (in the second embodiment, since the buffer materials 170 and 171 have the function of maintaining the initial state of the percussion instrument 1 before striking, the buffer materials 170 and 171 are preferably not omitted). In addition, the positions at which the buffer materials 170, 171, and 373 are attached may also be changed, or other buffer materials may also be added in addition to the buffer materials 170, 171, and 373.

[0165] In the first embodiment, it has been described that the percussion instrument 1 is fixed to the front surface of the pedal support plate 110 via the support rubbers 140, but the embodiment is not necessarily limited thereto. For example, the support rubbers 140 may also be fixed to the front leg 120 (fixing portion 121) or the rear leg 130 (fixing portion 131) of the stand 100. In that case, through holes in which the support rubbers 140 are capable of being disposed may be formed in the pedal support plate 110. In addition, in the case where members other than the pedal support plate 110 and the legs 120 and 130 are provided on the stand 100, the support rubbers 140 may also be fixed to such other members.

[0166] In the first embodiment, it has been described that the fixing position P2 of the support rubber 140 with respect to the frame 2 is configured to be located on the upper side of the fixing position P1 of the support rubber 140 with respect to the pedal support plate 110, that is, the fixing position P2 is farther from the center of the striking surface compared to the fixing position P1, but the embodiment is not necessarily limited thereto. For example, the fixing position P2 may also be configured to be closer to the center of the striking surface compared to the fixing position P1, such as a configuration in which the fixing position P2 is located lower than the fixing position P1.

[0167] In the second embodiment, it has been described that the brackets 280 are rotatably attached to the outer circumferential surface of the fixing portion 221 (cylindrical pipe), and such brackets 280 are fixed to the frame 2 (percussion instrument 1), but the embodiment is not necessarily limited thereto. For example, the percussion instrument 1 may also be rotatably supported on the stand 200 using conventional components (such as bearings) configured to support rotating members. In addition, in the second embodiment, it has been described that the sleeves 290a and 290b are interposed between the fixing portion 221 and the bracket 280, but the sleeves 290a and 290b may also be omitted, and the fixing portion 221 may also be directly clamped by the bracket 280.

[0168] In the second embodiment, it has been described that displacement of the sleeves 290a and 290b is restricted by the engagement between the recess 224 formed on the outer circumferential surface of the fixing portion 221 and the inner protrusions 291 formed on the inner circumferential surfaces of the sleeves 290a and 290b, but the embodiment is not necessarily limited thereto. For example, a protrusion configured to restrict displacement of the sleeves 290a and 290b may also be formed on the outer circumferential surface of the fixing portion 221, while recesses configured to fit with such a protrusion may be formed in the sleeves 290a and 290b.

[0169] In the third embodiment, it has been described that the attaching plates 314 are formed integrally with the pedal support plate 310 made of a metal plate, that is, the pedal support plate 310 and the attaching plates 314 are formed by bending one metal plate, but the embodiment is not necessarily limited thereto. For example, the attaching plates 314 and the pedal support plate 310 may also be separate components, and the attaching plates 314 may be fixed to the leg 220 (fixing portion 221) or the pedal support plate 310. In addition, in the case where members other than the pedal support plate 310 and the leg 220 (fixing portion 221) are provided on the stand 300, the attaching plates 314 may also be fixed to such other members.Reference Signs List

[0170] 1 percussion instrument 2 frame (housing) 20 support portion (bottom surface of housing) 20a recess (hole) 20b through hole (hole) 20c bottom wall 20d side wall 22 cylindrical portion 4 head 5 first cushion (first elastic body) (elastic body) 51 vent hole 6 second cushion (second elastic body) (elastic body) 61 vent hole 7 film member R1 struck region (first region)

Examples

second embodiment

[0100]As shown in FIG. 8, in the stand 200 of the second embodiment, a leg 220 is fixed to a back surface of a pedal support plate 210. The leg 220 mainly includes a fixing portion 221 that extends in the horizontal direction and is fixed to the back surface of the pedal support plate 210, and a pair of leg portions 222 configured to support both longitudinal ends of the fixing portion 221.

[0101]The fixing portion 221 is one metal pipe, and a lower pipe 223 protruding downward from a lower surface of the fixing portion 221 is welded to the fixing portion 221. The lower pipe 223 extending vertically is also fixed to the back surface of the pedal support plate 210.

[0102]The leg portion 222 is formed by bending a metal pipe, and by welding a bent portion of the leg portion 222 to the longitudinal end portion of the fixing portion 221, one end of the leg portion 222 descends and inclines forward from the fixing portion 221 and contacts the mounting surface on the front side of the pedal...

first embodiment

[0103]A pedal fixing portion 111 configured to support a foot pedal 160 (see FIG. 10) is formed at the lower end portion of the pedal support plate 210, as in the During striking on the percussion instrument 1 by the foot pedal 160, the percussion instrument 1 rotates around the fixing portion 221 via brackets 280. Details of the structure for rotating the percussion instrument 1 will be described with reference to FIG. 9.

[0104]FIG. 9 is an exploded perspective view of the stand 200 showing a state in which the percussion instrument 1 is removed. In FIG. 9, among two sets of sleeves 290a and 290b mounted on the fixing portion 221, one set of sleeves 290a and 290b (sleeves located at the upper left in FIG. 9) is illustrated in a state of pinching the fixing portion 221, and the other set of sleeves 290a and 290b (sleeves located at the lower right in FIG. 9) is illustrated in a state of being removed from the fixing portion 221.

[0105]As shown in FIG. 9, the pedal support plate 210 i...

third embodiment

[0133]As shown in FIG. 11, the stand 300 of the third embodiment includes U-shaped attaching plates 314 to which the percussion instrument 1 is attached. The attaching plate 314 includes: a first vertical portion 314a extending in the vertical direction (upward) from an upper end portion of a pedal support plate 310; a curved portion 314b curving forward from an upper end of the first vertical portion 314a; and a second vertical portion 314c extending in the vertical direction (downward) from a front end of the curved portion 314b. Such portions 314a to 314c are integrally formed using a metal plate.

[0134]The curved portion 314b has a curved shape that is convex upward, and the attaching plate 314 functions as a U-shaped leaf spring (U-shaped spring) mainly by elastic deformation of the curved portion 314b. The second vertical portion 314c extends downward from the first vertical portion 314a to face the pedal support plate 310, and the rear surface of the frame 2 is fixed to the se...

Claims

1. A percussion instrument comprising: a head forming a striking surface; and a housing having a cylindrical portion in a cylindrical shape, the cylindrical portion having an opening portion to be covered with the head, wherein the housing comprises a plurality of holes in a polygonal shape formed on a bottom surface located on an inner circumferential side of the cylindrical portion and arranged such that sides of the holes are adjacent to each other, and at least a part of the holes among the plurality of holes extend through the bottom surface of the housing.

2. The percussion instrument according to claim 1, wherein the plurality of holes in a same shape are formed on the bottom surface of the housing to fill a plane.

3. The percussion instrument according to claim 2, wherein the bottom surface of the housing is formed in a honeycomb shape by forming the plurality of holes in a regular hexagonal shape.

4. The percussion instrument according to claim 1, wherein the plurality of holes are formed in a region of 60% or more of an area of a portion of the bottom surface of the housing that is located on the inner circumferential side of the cylindrical portion.

5. The percussion instrument according to claim 1, wherein among the plurality of holes, a part of the holes are through holes extending through the housing, while the other holes are recesses formed on the bottom surface of the housing.

6. The percussion instrument according to claim 5, wherein a bottom wall of the recess and a side wall partitioning the recess and the through hole are integrally formed.

7. The percussion instrument according to claim 1, further comprising: an elastic body sandwiched between the bottom surface of the housing and the head, wherein the elastic body comprises vent holes for ensuring ventilation properties from a head side toward a bottom surface side of the housing.

8. The percussion instrument according to claim 7, further comprising: a film member in a film shape laminated between the elastic body and the bottom surface of the housing, wherein a plurality of vent holes smaller than the hole are formed in the film member.

9. The percussion instrument according to claim 7, wherein with a struck region on a central side of the elastic body being defined as a first region and a region surrounding the first region on an outer circumferential side of the first region being defined as a second region, an opening ratio of the vent holes in the first region is lower than an opening ratio of the vent holes in the second region.

10. The percussion instrument according to claim 7, wherein the elastic body comprises at least a first elastic body stacked on the head side, and a second elastic body stacked between the first elastic body and the bottom surface of the housing.

11. The percussion instrument according to claim 10, wherein the first elastic body is formed to be softer than the second elastic body.

12. The percussion instrument according to claim 10, further comprising: a film member in a film shape laminated between the first elastic body and the second elastic body, wherein a plurality of vent holes smaller than the vent holes of the first elastic body and the second elastic body are formed in the film member.

13. The percussion instrument according to claim 12, wherein the film member is formed to have a coefficient of friction lower than the first elastic body and the second elastic body.

14. The percussion instrument according to claim 10, wherein an opening ratio of the vent holes in the first elastic body and an opening ratio of the vent holes in the second elastic body are different from each other.

15. The percussion instrument according to claim 14, wherein the opening ratio of the vent holes in the first elastic body is lower than the opening ratio of the vent holes in the second elastic body.

16. A method for reinforcing a housing in a percussion instrument, the percussion instrument comprising: a head forming a striking surface; and a housing having a cylindrical portion in a cylindrical shape, the cylindrical portion having an opening portion on one end side to be covered with the head, the method comprising: forming a plurality of holes in a polygonal shape on a bottom surface of the housing located on an inner circumferential side of the cylindrical portion, the holes being arranged such that sides of the holes are adjacent to each other; and extending at least a part of the holes among the plurality of holes through the bottom surface of the housing.

Images