Methods for strengthening percussion instruments and their frames

Abstract

On the support portion 20 of the frame 2, a plurality of hexagonal recesses 20a and through holes 20b are formed, arranged so that their edges are adjacent to each other. This allows a portion of the vibration (sound) from when the drumhead 4 is struck to be released to the outside through the through holes 20b, thus suppressing the echo of the vibration within the frame 2. Furthermore, the rigidity of the support portion 20 (frame 2) can be effectively improved by the bottom wall 20c of the recesses 20a or the side wall 20d dividing the recesses 20a and the through holes 20b. Therefore, the rigidity of the frame 2 can be increased while reducing the volume when the drumhead 4 is struck.

Description

Technical Field

[0001] This invention relates to a percussion instrument and a method for strengthening its frame, and more particularly to a percussion instrument and a method for strengthening its frame that can increase the rigidity of the frame while reducing the volume generated when striking the drumhead. Background Technology

[0002] For example, Patent Document 1 describes a technique in which a generally triangular opening is formed on the connecting portion 4c of the sensor frame 4, which forms the bottom surface of the percussion instrument frame. Since multiple openings are formed circumferentially on the sensor frame 4, vibrations from striking the drumhead 5 can easily escape to the outside through these openings. This suppresses the reverberation of vibrations from striking the drumhead 5 within the frame, thus reducing the volume generated during striking. Furthermore, rib-like walls rising from the bottom surface of the sensor frame 4 are provided around the openings, ensuring the rigidity of the sensor frame 4.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-198657 (e.g., paragraphs 0044, 0048, and 0051), Figure 2 ) Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In this type of percussion instrument, there is a need for a technique that can more effectively increase the rigidity of the frame while reducing the volume generated when striking the drumhead.

[0008] This invention was developed to address the aforementioned problems, and its purpose is to provide a percussion instrument that can increase the rigidity of the frame while reducing the volume generated when striking the drumhead, as well as a method for strengthening the frame.

[0009] Technical means to solve the problem

[0010] To achieve the aforementioned objective, the percussion instrument of the present invention includes: a drumhead forming a striking surface; and a frame having a cylindrical portion with an opening covered by the drumhead, the frame including a plurality of polygonal holes formed on a bottom surface located on the inner periphery of the cylindrical portion and arranged such that their edges are adjacent to each other, at least a portion of the plurality of holes penetrating the bottom surface of the frame.

[0011] The frame reinforcement method of the present invention is a frame reinforcement method in a percussion instrument, the percussion instrument including: a drumhead forming a striking surface; and a frame having a cylindrical portion having an opening at one end covered by the drumhead. In the frame reinforcement method, a plurality of polygonal holes are formed on the bottom surface of the frame located on the inner circumference side of the cylindrical portion, arranged such that their edges are adjacent to each other, and at least a portion of the plurality of holes penetrates the bottom surface of the frame. Attached Figure Description

[0012] [ Figure 1 [Illustration 1] is an exploded perspective view of the percussion instrument according to the first embodiment.

[0013] [ Figure 2 [ ] is a cross-sectional view of a percussion instrument.

[0014] [ Figure 3 [This is a perspective view of the frame showing the state of the mounting components after they have been removed.]

[0015] [ Figure 4 (a) is Figure 2 (a) is a front view of the percussion instrument viewed in the direction of arrow IVa. (b) is... Figure 4 (a) Enlarged cross-sectional view of the percussion instrument at line IVb-IVb.

[0016] [ Figure 5 [This is a perspective view of the back of the stand showing the state of the percussion instruments disassembled.]

[0017] [ Figure 6 [This is a partially enlarged cross-sectional view showing the pedal support plate and frame based on the support structure of the supporting rubber.]

[0018] [ Figure 7 [ ] is a cross-sectional view of a support showing a percussion instrument being struck by a hammer.

[0019] [ Figure 8 [This is a perspective view of the back of the bracket according to the second embodiment.]

[0020] [ Figure 9 [This is an exploded perspective view showing the support frame with the percussion instruments disassembled.]

[0021] [ Figure 10 [This is a side view of a stand showing a percussion instrument being struck by a hammer.]

[0022] [ Figure 11 [This is a perspective view of the back of the bracket according to the third embodiment.]

[0023] [ Figure 12 [This is a side view of a stand showing a percussion instrument being struck by a hammer.] Detailed Implementation

[0024] Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. First, referring to... Figure 1 The overall structure of the percussion instrument 1 according to the first embodiment will be described. Figure 1 This is an exploded perspective view of the percussion instrument 1 according to the first embodiment.

[0025] like Figure 1 As shown, the percussion instrument 1 is an electronic percussion instrument that simulates an acoustic bass drum, including a frame 2 that forms its body. The frame 2 includes a generally disc-shaped support 20 that supports the drumhead sensor 3, and a cylindrical outer periphery 21 that rises from the outer edge of the support 20.

[0026] A cylindrical portion 22 is formed on the inner periphery side, which is closer to the outer periphery 21, in order to tension the drum skin 4. Each part 20 to 22 of these frames 2 is integrally formed using resin material. The cylindrical portion 22 stands upright from the support portion 20, and a groove 23 extending in the circumferential direction is formed between the outer periphery 21 and the cylindrical portion 22.

[0027] On the bottom surface of the groove 23 (the part of the support 20 located between the outer peripheral part 21 and the cylindrical part 22), a plurality of (six in this embodiment) internal threaded holes 23a are arranged at equal intervals in the circumferential direction, and the drum skin frame 40 of the drum skin 4 is mounted using these internal threaded holes 23a.

[0028] Regarding the drumhead 4, it is formed into a disc shape using a mesh fabric made of woven synthetic fibers, and a circular drumhead frame 40 is fixed to the outer edge of the drumhead 4. The drumhead frame 40 is formed using resin material, and the drumhead 4 and the drumhead frame 40 are integrally formed by molding. Alternatively, materials other than resin (such as metals like aluminum or iron) can be used to form the drumhead frame 40, and the drumhead frame 40 can be joined to the drumhead 4 by adhesive or the like.

[0029] On the drumhead frame 40, a plurality of insertion holes (not shown) are formed at positions corresponding to the internal threaded holes 23a of the frame 2, and bolts B1 are inserted into these insertion holes. With the drumhead 4 covering the opening portion of the cylinder 22, by tightening the bolts B1 into the internal threaded holes 23a, the drumhead frame 40 is pulled toward the bottom side of the groove 23, thereby applying tension to the drumhead 4 (for the state of applying tension to the drumhead 4, refer to...). Figure 2 ).

[0030] With tension applied to the drumhead 4, the drumhead sensor 3 contacts the back of the drumhead 4, and detects the vibration when the drumhead 4 is struck. Furthermore, the drumhead 4 of the percussion instrument 1 simulating a bass drum is struck by the hammer 162 of the foot pedal 160 (see reference). Figure 7 The details of the strikes made by hammer 162 will be described later.

[0031] When a strike to the drumhead 4 is detected by the drumhead sensor 3, a musical tone signal based on the detection result is generated by a sound source (not shown). This musical tone signal is then output to an amplifier or a speaker (neither shown), thereby emitting an electronic musical tone from the speaker. The impact of the strike to the drumhead 4 is absorbed by the first buffer pad 5 and the second buffer pad 6. (Refer to...) Figure 1 and Figure 2 The structure of each of these buffer pads 5 and 6 will be explained.

[0032] Figure 2 This is a cross-sectional view of percussion instrument 1. Furthermore, in Figure 2 The diagram shows a cross-section cut along the axis (center) of the cylindrical portion 22 and the plane containing the drumhead sensor 3.

[0033] like Figure 1 and Figure 2 As shown, on the frame 2 (support 20) of the percussion instrument 1, a first buffer pad 5 and a second buffer pad 6 are stacked sequentially from the drumhead 4 side. Each of these buffer pads 5 and 6 is formed in a disc shape with a diameter equal to (or slightly smaller than) the inner diameter of the cylindrical portion 22 of the frame 2. Through holes 50 and 60 for mounting the drumhead sensor 3 are formed on each of the buffer pads 5 and 6. These through holes 50 and 60 are shaped to correspond to the mounting member 8 that supports the drumhead sensor 3; details about the mounting member 8 will be provided later. Figure 2 and Figure 3 Please provide an explanation.

[0034] The combined thickness of the two cushioning pads 5 and 6 is greater than the gap between the support portion 20 of the frame 2 and the drumhead 4. Therefore, the cushioning pads 5 and 6 are stacked in a compressed state between the support portion 20 and the drumhead 4. Furthermore, in Figure 2 In order to simplify the accompanying drawings, the second buffer pad 6 is shown as a single-layer buffer pad, but in fact the second buffer pad 6 is composed of three layers of buffer pads.

[0035] Each cushioning pad 5 and 6 is formed into a disc shape using polyurethane foam synthetic resin. However, as long as the material has the specified softness, each cushioning pad 5 and 6 may also be formed using resins such as rubber, elastomers (synthetic resins), or foaming materials using these resins (hereinafter referred to as "elastic materials").

[0036] When the cushioning pads 5 and 6 are formed from elastic materials such as rubber or elastomers (not solid materials made of foam), it is preferable to use elastic materials with a hardness of 10 or higher and 50 or lower as measured by a Durometer Type A hardness tester according to Japanese Industrial Standards (JIS) K6253-3:2012. Furthermore, when the cushioning pads 5 and 6 are formed from foam materials (sponge) such as rubber or synthetic resins, it is also preferable to measure the hardness according to JIS K6253-3:2012.

[0037] By clamping softer cushioning pads 5 and 6 (compared to the frame 2) between the support 20 and the drumhead 4, the vibrations (impacts) of the drumhead 4 when struck can be absorbed by the cushioning pads 5 and 6. Therefore, the volume generated when the drumhead 4 is struck can be reduced. Furthermore, multiple vent holes 51 and 61 are formed on each cushioning pad 5 and 6, connecting its surface (the side facing the drumhead 4) and its back surface (the side facing the support 20). By forming these vent holes 51 and 61, ventilation from the drumhead 4 side towards the support 20 side can be ensured, thus reducing the sound generated by the vibrations of the cushioning pads 5 and 6 when the drumhead 4 is struck. This also reduces the volume generated when the drumhead 4 is struck.

[0038] The technique of sandwiching the various buffer pads 5 and 6 between the support portion 20 of the frame 2 and the drumhead 4 is known from Japanese Patent Application Publication No. 2001-142459. In this technique, the buffer pads (impact-absorbing members 22) can also absorb the impact when striking the drumhead (drumhead member 11). However, in this technique, since the buffer pads are single-layered, the impact when striking the drumhead is concentrated on a portion of the buffer pad that has no escape area (the impacted area). Therefore, there is a problem that the buffer pads are easily damaged.

[0039] In contrast, in this embodiment, since the first buffer pad 5 disposed on the drumhead 4 side and the second buffer pad 6 disposed on the support 20 side are stacked, when the drumhead 4 is struck, the upper and lower buffer pads 5 and 6 can move in a way that causes them to contact or separate, or they can move in a way that causes them to slide sideways. As a result, the impact of striking the drumhead 4 can escape between the layers of the buffer pads 5 and 6, and therefore, compared to the case where the buffer pads are a single layer, the buffer pads 5 and 6 are less likely to be damaged.

[0040] Similarly, since the second buffer pad 6 is composed of three layers of buffer pads, the impact when striking the drumhead 4 can escape between the layers of the buffer pads that make up the second buffer pad 6. Therefore, compared with the case where the second buffer pad 6 is a single layer, the second buffer pad 6 becomes less susceptible to damage.

[0041] Furthermore, the hardness of the first buffer pad 5 (according to the JIS standard) is lower than that of the second buffer pad 6. That is, because the first buffer pad 5 is made softer than the second buffer pad 6, the impact of striking the drumhead 4 is more easily absorbed by the first buffer pad 5, while the relatively harder second buffer pad 6 facilitates the acquisition of a striking feel. Therefore, it is possible to achieve a striking feel similar to an acoustic drum while reducing the sound produced when striking the drumhead 4.

[0042] Here, by hammer 162 (see reference) Figure 7 When striking the drumhead 4, the central side of the drumhead 4 is primarily struck, while the outer periphery of the drumhead 4 is struck less frequently. Therefore, in the following description, the area formed near the center of the drumhead 4 and comprising less than 30% of the area of ​​the drumhead 4 is defined as the struck area (first area). Figure 4 The area shown as R1 is described below, and the area further outward than the struck area is defined as the non-strike area (second area).

[0043] When the drumhead 4 is struck in the area to be struck, the drumhead 4 may sometimes become lodged in the vent hole 51. If the drumhead 4 becomes lodged in the vent hole 51, a crack will appear at the edge of the opening of the vent hole 51, and the first buffer pad 5 will be easily damaged.

[0044] In contrast, in this embodiment, the opening ratio of the vent 51 at the portion of the first buffer pad 5 corresponding to the impacted area (the portion overlapping the impacted area when viewed axially from the cylinder 22) is lower than the opening ratio of the vent 51 at the portion corresponding to the non-impacted area (the portion overlapping the non-impacted area when viewed axially from the cylinder 22). Therefore, the impact can be received at the portion of the first buffer pad 5 with the relatively lower opening ratio of the vent 51, thus mitigating stress concentration on the first buffer pad 5 caused by the impact. Therefore, damage to the first buffer pad 5 can be suppressed.

[0045] Furthermore, in this embodiment, the opening ratio of the vent hole 51 in the first buffer pad 5 and the opening ratio of the vent hole 61 in the second buffer pad 6 are set to different values. More specifically, the areas of each buffer pad 5 and 6 are approximately the same, but the opening ratio of the vent hole 51 relative to the area of ​​the buffer pad 5 (e.g., 20% or more and less than 30%) is lower than the opening ratio of the vent hole 61 relative to the area of ​​the buffer pad 6 (e.g., 30% or more and less than 40%). That is, since the opening ratio of the vent hole 51 of the first buffer pad 5, which is substantially directly impacted, is relatively small, it is possible to prevent the drumhead 4 from sinking into the vent hole 51 when it is struck. Therefore, damage to the buffer pad 5 can be suppressed.

[0046] like Figure 2 As shown in the lower right magnified portion, membrane members 7 are sandwiched between each of the buffer pads 5 and 6. Although not shown in the diagram, a through hole (and) is formed in the membrane member 7 for the passage of the drumhead sensor 3 (mounting member 8). Figure 1 The through hole 50 and through hole 60 shown are holes of the same shape.

[0047] The membrane component 7 is formed into a membrane shape using a mesh fabric made of woven synthetic fibers. That is, because the membrane component 7 has multiple vent holes (not shown) smaller than the vent holes 51 and 61 of the buffer pads 5 and 6, the airflow through the vent holes 51 and 61 of each buffer pad 5 and 6 is suppressed by the membrane component 7. Therefore, even when the membrane component 7 is stacked between the buffer pads 5 and 6, the interlayer airflow of the buffer pads 5 and 6 is ensured, thus reducing the sound generated by the vibration of each buffer pad 5 and 6 when the drumhead 4 is struck.

[0048] Furthermore, by inserting the membrane member 7 between each of the buffer pads 5 and 6, it is possible to prevent the buffer pads 5 and 6 from being compressed (strongly and tightly joined) to each other when the drumhead 4 is struck. Therefore, damage to each of the buffer pads 5 and 6 (especially the relatively soft first buffer pad 5) can be suppressed.

[0049] Furthermore, since the membrane component 7 is formed using a mesh made of woven synthetic fibers, it has a lower coefficient of friction compared to the buffer pads 5 and 6. As a result, wear of the buffer pads 5 and 6 (especially the relatively soft first buffer pad 5) due to mutual friction with the membrane component 7 can be suppressed.

[0050] like Figure 2 As shown in the enlarged portion at the upper right, a recess 20a and a through hole 20b are formed on the support portion 20, and a membrane member 7 is also stacked between the support portion 20 and the second buffer pad 6. As described above, since the membrane member 7 is ventilable (having multiple vent holes smaller than the recess 20a and the through hole 20b), ventilation from the drumhead 4 and the through hole 20b can be ensured. Therefore, a portion of the sound (vibration) generated when the drumhead 4 is struck can be released to the outside, thus suppressing the echo of the vibration within the frame 2. Therefore, the volume generated when the drumhead 4 is struck can be reduced.

[0051] Furthermore, by layering the membrane member 7 between the support portion 20 and the second buffer pad 6, it is possible to prevent the buffer pad 6 from sinking into the recess 20a or the through hole 20b when the drumhead 4 is struck. Therefore, damage to the buffer pad 6 can be suppressed.

[0052] Next, refer to Figure 2 and Figure 3The detailed structure of the recess 20a and the through hole 20b formed on the support 20 will be described. Figure 3 This is a perspective view of the frame 2 showing the state of the mounting component 8 after it has been disassembled.

[0053] like Figure 2 and Figure 3 As shown, a plurality of recesses 20a and through holes 20b are formed in the support portion 20 on the inner circumferential side of the cylindrical portion 22. The recesses 20a are holes recessed into the support portion 20, while the through holes 20b are holes that penetrate the support portion 20 (regarding the through holes 20b penetrating the support portion 20, see [reference needed]). Figure 2 The upper right magnification section or Figure 5 That is, the bottom of the recess 20a is blocked by the bottom wall 20c, while the through hole 20b penetrates without the formation of such a bottom wall 20c.

[0054] Multiple recesses 20a and through holes 20b are formed in a polygonal (hexagonal in this embodiment) shape arranged such that their edges are adjacent to each other. In other words, multiple recesses 20a and through holes 20b are divided by sidewalls 20d, and each recess 20a and through hole 20b is adjacent to each other across a sidewall 20d.

[0055] By forming multiple recesses 20a and through holes 20b on the support portion 20, a portion of the vibration (sound) when the drumhead 4 is struck can be released to the outside through the through holes 20b. Therefore, the reverberation of the vibration within the frame 2 can be suppressed, thereby reducing the volume when the drumhead 4 is struck. Furthermore, the bottom wall 20c (the wall blocking the hole) of the recess 20a and the side wall 20d dividing the recess 20a and the through hole 20b can effectively improve the rigidity of the frame 2 (support portion 20).

[0056] Furthermore, on the support portion 20, multiple recesses 20a and through holes 20b of the same shape are arranged in a planar filling manner. As a result, the rigidity of the support portion 20 (the bottom surface of the frame 2) can be uniformly improved throughout the entire structure.

[0057] When the plane of the support portion 20 is filled with the recesses 20a and the through holes 20b, the recesses 20a and the through holes 20b can also be formed into equilateral triangles, squares, or other polygons (e.g., parallelograms or arbitrary quadrilaterals). However, when comparing polygons with the same inscribed circle diameter, it is most preferable to form the recesses 20a and the through holes 20b into regular hexagonal shapes as in this embodiment. Thus, the support portion 20 becomes a honeycomb structure. Since the sides (sidewalls 20d) that can disperse impacts from the lateral direction (adjacent recesses 20a and through holes 20b) are more numerous than those of other polygons, the rigidity of the support portion 20 (frame 2) can be effectively improved.

[0058] Furthermore, in this embodiment, recesses 20a and through holes 20b are arranged without gaps in an area covering more than 60% of the area of ​​the portion located on the inner periphery of the cylindrical portion 22 in the support portion 20. As a result, the rigidity of the frame 2 (support portion 20) can be effectively improved by means of the recesses 20a and through holes 20b (bottom wall 20c and side wall 20d), while improving the sound transmission through the through holes 20b.

[0059] Furthermore, the larger the area of ​​the recess 20a and the through hole 20b, the better the sound reproduction and the rigidity of the support 20. Therefore, the recess 20a and the through hole 20b are more preferably formed in a region of 70% or more of the area of ​​the portion located on the inner periphery of the cylindrical portion 22 in the support 20, and even more preferably formed in a region of 80% or more of the same area.

[0060] Here, when only the recesses 20a are formed on the support portion 20 (blocking all the through holes 20b as recesses 20a), although the rigidity of the support portion 20 is increased, the vibrations when the drumhead 4 is struck are no longer emitted to the outside. Therefore, the quietness of the percussion instrument 1 is reduced. On the other hand, when only the through holes 20b are formed on the support portion 20 (using all the recesses 20a as through holes 20b), the rigidity of the support portion 20 cannot be sufficiently increased, and most of the vibrations when the drumhead 4 is struck are emitted from the through holes 20b. The sound-absorbing effect of absorbing the vibrations reverberating within the frame 2 through the buffer pads 5 and 6 cannot be obtained at all. Therefore, from the viewpoint of the quietness of the percussion instrument 1, this is also not preferable.

[0061] Therefore, the opening ratio of the through hole 20b is preferably 15% to 35% of the area of ​​the portion of the support portion 20 located on the inner circumferential side of the cylindrical portion 22, and more preferably 20% to 30%. By forming the through hole 20b with this opening ratio, it is possible to ensure sound transmission through the through hole 20b while effectively improving the rigidity of the support portion 20 (frame 2) by forming the recess 20a and the walls 20c and 20d of the through hole 20b.

[0062] Thus, if the goal is to make the recess 20a a depression formed on the support portion 20, and the through hole 20b a hole penetrating the support portion 20, the flat bottom wall 20c, which is separately formed from the support portion 20 (side wall 20d), can be fixed to the support portion 20 (side wall 20d) by means of adhesive bonding or the like. However, in this structure, the rigidity of the frame 2 (support portion 20) cannot be sufficiently improved. In contrast, in this embodiment, since the bottom wall 20c and the side wall 20d of the support portion 20 are integrally formed using resin material, the rigidity of the support portion 20 (frame 2) can be effectively improved.

[0063] Furthermore, in this embodiment, the entire bottom of the recess 20a is closed by the bottom wall 20c. On the other hand, the bottom wall 20c is not formed in the through hole 20b, but for example, a structure in which a hole is formed through a portion of the bottom wall 20c of the recess 20a (or a structure that closes a portion of the bottom of the through hole 20b) could also be used. However, if a structure is formed where a hole is formed through a portion of the bottom wall 20c of the recess 20a, the structure of the mold for resin molding the frame 2 becomes more complex. That is, if the opening ratio of the hole through the support portion 20 is to be changed, the mold design becomes complicated.

[0064] In contrast, if the bottom of the recess 20a is completely blocked by the bottom wall 20c as in this embodiment, and the bottom wall 20c is not formed in the through hole 20b, the mold structure for resin molding of the frame 2 can be simplified. That is, for example, if the opening ratio of the through hole 20b in the support 20 is increased, only the number of through holes 20b formed (changing from the recess 20a to the through hole 20b) needs to be increased, so the mold design can be easily carried out.

[0065] Next, the detailed structure of the mounting member 8 on which the drumhead sensor 3 is mounted will be described below. The mounting member 8 includes a flat plate-shaped fixing part 80 fixed to the support part 20, a cylindrical mounting part 81 erected from the fixing part 80 for mounting the drumhead sensor 3, and a wall part 82 formed to surround the mounting part. These parts 80 to 82 are integrally formed using resin material.

[0066] A pair of insertion holes 80a are formed on both ends of the fixing part 80 in the circumferential direction of the cylindrical part 22. On the support part 20, an internal threaded hole 20e is formed at a position corresponding to the pair of insertion holes 80a (see reference). Figure 3 The mounting member 8 is mounted on the frame 2 (support 20) by fastening the bolt B2, which is inserted into the insertion hole 80a, into the internal threaded hole 20e.

[0067] A plate 9 supporting the drumhead sensor 3 is mounted on the mounting portion 81 of the mounting member 8. The plate 9 is a generally elliptical plate whose circumferential (length direction) dimension of the cylindrical portion 22 is larger than its radial (width direction) dimension, and a pair of insertion holes 90 are formed at both ends of the plate 9 along its length. The plate 9 is mounted on the mounting member 8 by tightening bolts B3, which are inserted into the pair of insertion holes 90, into the internal threaded holes of the mounting portion 81. Thus, the drumhead sensor 3 is supported on the mounting member 8 via the plate 9.

[0068] Because the mounting component 8 is installed off-center from the center of the support 20 (drumhead 4), the drumhead sensor 3 is also similarly positioned off-center from the center of the support 20. This is to prevent the relatively large striking force of the hammer 162 (see reference) from being deflected. Figure 7 The impact force is directly applied to the drumhead sensor 3.

[0069] With the drumhead sensor 3 installed on the mounting component 8 (see reference) Figure 2 Below, a wall-shaped portion 82, rising from the fixing portion 80, is disposed around the drumhead sensor 3. Since the wall portion 82 protrudes higher than the cylinder portion 22 and contacts the drumhead 4 (pushing the drumhead 4 upwards), the tension of the drumhead 4 around the drumhead sensor 3 can be increased. Therefore, even when the drumhead sensor 3 is positioned off-center on the outer periphery of the drumhead 4, vibrations when the drumhead 4 is struck can be easily detected by the drumhead sensor 3. Thus, the impact on the drumhead 4 can be detected with high accuracy.

[0070] Next, refer to Figure 4 The structure of the drumhead sensor 3 and the mounting component 8 will be further explained. Figure 4 (a) is Figure 2 A front view of percussion instrument 1 viewed in the direction of arrow IVa. Figure 4 (b) is Figure 4 (a) A partially enlarged cross-sectional view of percussion instrument 1 at line IVb-IVb. Furthermore, in Figure 4 In (a), the drumhead sensor 3 (buffer pad 32) and the wall portion 82 hidden in the drumhead 4 are shown in dashed lines, but regarding the wall portion 82, only the part in contact with the drumhead 4 is shown in dashed lines.

[0071] like Figure 4 As shown, on plate 9 (refer to...) Figure 4 On the upper surface of (b), a disc-shaped sensor 31 (piezoelectric element) is attached by a cushioning double-sided adhesive tape 30, and a cushioning pad 32 is attached to the upper surface of the sensor 31. The double-sided adhesive tape 30, the sensor 31 and the cushioning pad 32 constitute the drumhead sensor 3.

[0072] The buffer pad 32 of the drumhead sensor 3 is a cylindrical buffer material made of soft materials such as sponge, rubber, or thermoplastic elastomer, and the buffer pad 32 is in contact with the drumhead 4.

[0073] The drumhead 4 will be designed to receive the hammer 162 (see reference). Figure 7 The area targeted by the attack is designated as the attacked area R1 (refer to...). Figure 4 (a) As described above, the struck area R1 is an area formed near the center of the drumhead 4 and less than 30% of the area of ​​the drumhead 4.

[0074] In this case, if the wall portion 82 is formed in the area between the struck area R1 and the drumhead sensor 3, for example, if the wall portion 82 surrounds the entire circumference of the drumhead sensor 3, then when the struck area R1 is struck, the vibration of the drumhead 4, which is tensioned in the area between the struck area R1 and the drumhead sensor 3, is easily hindered by the wall portion 82. Therefore, the vibration when the struck area R1 is struck cannot be adequately transmitted to the drumhead sensor 3.

[0075] In contrast, in this embodiment, the wall portion 82 is formed in a portion of the area surrounding the drumhead sensor 3, but not in the area between the drumhead sensor 3 and the struck area R1 (the center C1 of the striking surface). Therefore, the vibration of the drumhead 4 located between the struck area R1 and the drumhead sensor 3 is suppressed by the wall portion 82, and the vibration when the drumhead 4 (the struck area R1) is struck is easily detected by the drumhead sensor 3. Thus, the strike on the drumhead 4 can be detected with high accuracy.

[0076] Thus, in cases where the vibration of the drumhead 4 located between the struck area R1 and the drumhead sensor 3 is hindered by the wall portion 82, for example, it is also possible to... Figure 4 (a) The wall portion 82 is formed at the position shown by the imaginary line V. That is, as shown by the imaginary line V, the wall portions 82 extending towards the impact area R1 (extending radially) can also be formed as a pair, with the drumhead sensor 3 in between, and made to contact the drumhead 4. However, if the wall portion 82 is formed at the position shown by the imaginary line V, when the drumhead 4 vibrates, the end of the upper surface of the wall portion 82 (the end located on the impact area R1 side) is prone to sinking into the drumhead 4, and therefore the drumhead 4 is easily damaged.

[0077] In contrast, in this embodiment, the wall portion 82 is formed in a region opposite to the struck area R1 (the center C1 of the drumhead 4) across the drumhead sensor 3, extending circumferentially in the cylinder portion 22. Therefore, compared to forming the wall portion 82 at the position shown by the imaginary line V, it is possible to prevent the ends of the upper surface of the wall portion 82 (both ends of the upper surface of the wall portion 82 in the circumferential direction of the cylinder portion 22) from sinking into the drumhead 4 when the drumhead 4 vibrates. Thus, while suppressing damage to the drumhead 4, it is possible to efficiently transmit the vibration of the drumhead 4, located between the struck area R1 and the drumhead sensor 3, to the drumhead sensor 3.

[0078] Furthermore, when viewed from above, the wall portion 82 is formed in an arc shape centered on the center C1 of the drum skin 4 (an arc shape along the circumference of the cylinder portion 22). That is, since the center C1 of the drum skin 4 is concentric with the center of the wall portion 82, the tension of the drum skin 4 around the drum skin sensor 3 can be uniformly increased. Therefore, the vibration when the drum skin 4 is struck can be detected with good accuracy by the drum skin sensor 3. Moreover, by forming the wall portion 82 in an arc shape, the stress concentration acting on the drum skin 4 or the wall portion 82 during impact can be mitigated, thus suppressing such damage.

[0079] In addition, such as Figure 4 As shown in (b), in the extending direction of the wall portion 82 (circumferential direction of the cylinder portion 22), the drumhead 4 mainly contacts a region R2 of constant height of the wall portion 82, and the height of the wall portion 82 (the height from the fixing portion 80) gradually decreases with the two ends of the region R2 as boundaries. That is, since the height of the wall portion 82 gradually decreases at both ends in its extending direction, the upper surface of the wall portion 82 at both ends is R-shaped. As a result, it is possible to suppress the two ends of the upper surface of the wall portion 82 from sinking into the drumhead 4 when the drumhead 4 vibrates, thus suppressing damage to the drumhead 4.

[0080] Furthermore, since a wall portion 82 is formed on the mounting member 8 that is detachably mounted on the support portion 20, the height of the wall portion 82 can be easily adjusted by changing the mounting height of the mounting member 8 by inserting a shim or the like between the support portion 20 and the mounting member 8. Therefore, the contact pressure of the wall portion 82 relative to the drumhead 4, i.e., the tension of the drumhead 4, can be easily adjusted.

[0081] Next, refer to Figure 5 The structure of the support 100 that supports the percussion instrument 1 will be described. Figure 5 This is a perspective view of the back of the support 100 showing the state of the percussion instrument 1 after it has been disassembled.

[0082] like Figure 5 As shown, the support 100 is a component that supports the percussion instrument 1 and, together with the percussion instrument 1, constitutes a percussion instrument unit. The support 100 includes a metal pedal support plate 110 that supports the percussion instrument 1. The pedal support plate 110 supports the foot pedal 160 (described later). Figure 7 The components of the pedal support plate 110 are fixed on the back side (the side opposite to the front surface on which the percussion instrument 1 is mounted) for mounting the bracket 100 on the mounting surface.

[0083] The front foot 120 includes a fixing part 121 extending horizontally and fixed to the back of the pedal support plate 110, and a pair of foot parts 122 bending from both ends of the fixing part 121 along its length. These parts 121 and 122 are formed by bending a metal tube.

[0084] An upper tube 123 protruding upward from its upper surface is welded onto the fixing part 121, and the upper tube 123 extending vertically is also fixed to the back of the pedal support plate 110. A pair of left and right feet 122 descend and tilt forward from both ends of the fixing part 121, and contact the mounting surface at a position further forward than the pedal support plate 110.

[0085] The rear foot 130 includes a fixing part 131 extending horizontally and fixed to the back of the pedal support plate 110, and a pair of foot parts 132 bending from both ends of the fixing part 131 along its length. These parts 131 and 132 are formed by bending a metal tube.

[0086] Two lower tubes 133 protruding downward from their lower surface are welded onto the fixing part 131, and the two lower tubes 133 extending vertically are also fixed to the back of the pedal support plate 110. A pair of left and right feet 132 descend and tilt backward from both ends of the fixing part 131 and come into contact with the mounting surface.

[0087] The pedal support plate 110 is supported at four points on the mounting surface by the front and rear feet 120 and 130. The lower end of the pedal support plate 110 is bent forward to form a pedal fixing part 111, on which the foot pedal 160 (see reference) is supported. Figure 7 ).

[0088] Mounting holes 112 are formed on the upper side of the pedal support plate 110 (above the fixing part 121 of the front foot 120). The mounting holes 112 are formed in a pair, spaced apart horizontally (separated by the upper tube 123), and the support rubber 140 is fixed using these mounting holes 112. A pair of mounting holes 20f for fixing the support rubber 140 are formed on the back side of the support part 20 (frame 2) of the percussion instrument 1. (Refer to...) Figure 6 The support structure of the support portion 20 (frame 2) using the support rubber 140 will be described. Figure 6 This is a partially enlarged cross-sectional view showing the pedal support plate 110 and frame 2 based on the support structure of the support rubber 140.

[0089] like Figure 6As shown, the support rubber 140 includes a cylindrical first cylindrical portion 141 fixed to the side of the pedal support plate 110 and a second cylindrical portion 142 fixed to the side of the support portion 20 (frame 2). These cylindrical portions 141 and 142 are integrally formed using rubber.

[0090] An inner cylinder 150 is inserted into an insertion hole 141a on the inner circumferential side of the first cylindrical portion 141. The inner cylinder 150 is a metal cylindrical body, through which a bolt B4 is inserted axially from one end of the inner cylinder 150. Figure 6 Insert the bolt B4 (at the front end on the right side). The support rubber 140 is fixed to the pedal support plate 110 by inserting the bolt B4 into the mounting hole 112 of the pedal support plate 110 and tightening it with the nut N1.

[0091] The length of the insertion hole 141a in the axial direction of the inner cylinder 150 is longer than the length of the inner cylinder 150 in the same direction. Therefore, with the bolt B4 tightened in the nut N1, the first cylinder portion 141 is compressed by the pedal support plate 110 and the head of the bolt B4. As a result, the elastic restoring force of the first cylinder portion 141 can be used to prevent the bolt B4 and the nut N1 from loosening.

[0092] An inner cylinder 150, identical to that of the first cylinder 141, is inserted into an insertion hole 142a on the inner circumferential side of the second cylinder 142, allowing the bolt B4 to be inserted from the other axial end of the inner cylinder 150. Figure 6 The bolt B4 is inserted from the rear end on the left side. The support portion 20 (frame 2) is fixed to the support rubber 140 by inserting the bolt B4 into the mounting hole 20f of the support portion 20 and tightening it with the nut N1. Regarding the second cylindrical portion 142, with the bolt B4 tightened with the nut N1, it is also in a state of compression by the support portion 20 and the head of the bolt B4. Therefore, the elastic restoring force of the second cylindrical portion 142 can be used to prevent the bolt B4 and the nut N1 from loosening.

[0093] Thus, in this embodiment, the percussion instrument 1 is supported oscillably by the support rubber 140 relative to the pedal support plate 110 of the bracket 100. (Refer to...) Figure 6 and Figure 7 The situation where the percussion instrument 1 is struck by the foot pedal 160 is described. Figure 7 This is a cross-sectional view of the support 100 showing the state of the percussion instrument 1 being struck by the hammer 162.

[0094] In addition, Figure 7 The diagram shows the center C1 of the drumhead 4 of the percussion instrument 1, located at the center of the support 100 in the horizontal direction (from the perspective of the performer, the left-right direction). Figure 4 A cross-section cut by a plane. Furthermore, in Figure 7In order to simplify the accompanying drawings, the cross-sectional structure of the percussion instrument 1 is omitted and is marked with a shading line, and a side view is shown instead of a cross-section of the foot pedal 160.

[0095] like Figure 7 As shown, the foot pedal 160 is a single-pedal foot pedal that includes a pedal 161 that is stepped on by the performer and a hammer 162 that rotates by stepping on the pedal 161.

[0096] With the foot pedal 160 supported by the pedal fixing part 111 of the pedal support plate 110, the percussion instrument 1 is struck by the hammer 162 when the pedal 161 is pressed. The striking position of the hammer 162 is compared with the reference position. Figure 4 The area R1 of the drumhead 4 that is struck is located further inside, roughly coinciding with the center C1 of the drumhead 4.

[0097] Furthermore, in the following explanation, Figure 4 The center C1 of the drumhead 4 shown is described as "the center of the striking surface", and the strike of the hammer 162 on the struck area R1 of the drumhead 4 is described as "the strike of the hammer 162 on the percussion instrument 1".

[0098] As described above, since the frame 2 (frame) of the percussion instrument 1 is swayably supported on the pedal support plate 110 via the support rubber 140, the percussion instrument 1 sways relative to the support 100 (pedal support plate 110 and each foot 120, 130) when it is struck by the hammer 162. This swaying absorbs the impact of the strike from the hammer 162. Therefore, when the hammer 162 strikes the percussion instrument 1, the vibration transmitted to the mounting surface S via the various parts of the support 100 (pedal support plate 110 or each foot 120, 130) can be reduced.

[0099] Here, will be located Figure 6 The point on the axis of the bolt B4 and located on the plane containing the front surface of the pedal support plate 110 is designated as the fixed position P1 of the support rubber 140 relative to the pedal support plate 110. Similarly, the point on the axis of the bolt B4 and located on the plane containing the back of the support part 20 (frame 2) will be described as the fixed position P2 of the support rubber 140 relative to the frame 2.

[0100] like Figure 7As shown, the support rubber 140 is positioned at a fixed point P2 (the pivot point of the percussion instrument 1) relative to the frame 2 at a height different from the center of the striking surface in the vertical direction. Therefore, it can receive strikes from the hammer 162 at a height different from the pivot point of the percussion instrument 1, allowing the percussion instrument 1 to swing more easily relative to the pedal support plate 110. Consequently, the impact of the strikes from the hammer 162 is easily absorbed, effectively reducing vibrations transmitted to the setting surface S.

[0101] Thus, if the purpose is to place the fixed position P2 (the swing fulcrum of the percussion instrument 1) of the support rubber 140 at a different height from the center of the striking surface, for example, the fixed positions P1 and P2 of the support rubber 140 may be placed at a lower position than the center of the striking surface.

[0102] However, since the direction of the strikes made by the hammer 162 is mostly downward and tilted towards the rear and lower side of the percussion instrument 1 (towards) Figure 7 (in the lower left direction), therefore, if the fixed positions P1 and P2 of the supporting rubber 140 are positioned further down than the center of the striking surface, the striking force generated by the hammer 162 will easily act towards the fixed positions P1 and P2 of the supporting rubber 140. If the hammer 162 strikes towards the fixed positions P1 and P2 of the supporting rubber 140, the percussion instrument 1 will find it difficult to swing around the supporting rubber 140 as a fulcrum, and the load will easily be applied to the fixed positions P1 and P2 of the supporting rubber 140.

[0103] In contrast, in this embodiment, the fixed position P2 of the supporting rubber 140 (the pivot point of the percussion instrument 1) is located above the center of the striking surface. Therefore, compared to the case where the fixed positions P1 and P2 of the supporting rubber 140 are located below the center of the striking surface, the percussion instrument 1 can more easily pivot around the supporting rubber 140, and the load applied to the fixed positions P1 and P2 of the supporting rubber 140 can be reduced. Thus, vibrations transmitted to the mounting surface S can be effectively reduced, and damage to parts in the fixed portion of the supporting rubber 140 can be suppressed.

[0104] Here, when the percussion instrument 1 is supported relative to the support 100 in a swingable manner, for example, the support 200 of the second embodiment described later (see reference) can also be used. Figure 8 The percussion instrument 1 is supported in a rotatable manner, as shown in the diagram. However, in this configuration, a bracket 280 or sleeves 290a and 290b are required (see [reference]). Figure 9The number of parts would increase if components such as the frame 2 were fixed to the support 100 (pedal support plate 110) via the support rubber 140. In contrast, as in this embodiment, by fixing the frame 2 to the support 100 (pedal support plate 110) via the support rubber 140, the number of parts can be reduced while the percussion instrument 1 can be supported in a swingable manner relative to the support 100.

[0105] Furthermore, when the percussion instrument 1 is supported by the support rubber 140 to allow it to swing, the percussion instrument 1 can also be fixed to the fixing part 121 of the front foot 120 via the support rubber 140 (see reference). Figure 5 In this case, it is sufficient to provide a through hole in the pedal support plate 110 for fixing the support rubber 140 to the fixing part 121. However, in order to stably fix the support rubber 140 to the fixing part 121 formed by the tube, the fixing structure can easily become complicated.

[0106] In contrast, in this embodiment, since the percussion instrument 1 is fixed to the front surface of the (flat) pedal support plate 110 formed of a metal plate via the support rubber 140, the support rubber 140 can be stably fixed using the flat portion of the pedal support plate 110. Therefore, the percussion instrument 1 can be supported relative to the bracket 100 in a swingable manner while simplifying the fixing structure of the support rubber 140.

[0107] In addition, the supporting rubber 140 can also be moved from... Figure 7 The direction shown is reversed, so that the fixed position P2 of the support rubber 140 relative to the frame 2 is located further downward than the fixed position P1 of the support rubber 140 relative to the pedal support plate 110. However, in this structure, since the fixed position P2 of the support rubber 140 relative to the frame 2 (the swing fulcrum of the percussion instrument 1) is close to the striking position of the hammer 162, the torque acting on the fixed position P2 by the strike is smaller. Therefore, the percussion instrument 1 is difficult to swing (it is impossible to make the percussion instrument 1 swing significantly).

[0108] In contrast, in this embodiment, the fixed position P2 of the support rubber 140 relative to the frame 2 is located higher than the fixed position P1 of the support rubber 140 relative to the pedal support plate 110. That is, since the fixed position P2 is farther from the center of the striking surface than the fixed position P1, the torque acting on the fixed position P2 when struck by the hammer 162 is relatively larger. As a result, the percussion instrument 1 is more likely to swing (the percussion instrument 1 can swing a large distance), and the impact of the strike by the hammer 162 is more easily absorbed. Therefore, the vibration transmitted to the setting surface S can be effectively reduced. This is achieved by fixing the percussion instrument 1 to the fixing part 121 of the front foot 120 via the support rubber 140 (see reference). Figure 5 The same applies in the case of ().

[0109] In order to reduce the vibration transmitted to the setting surface S, it is preferable to absorb the impact of the strike by making the percussion instrument 1 swing relatively large when it is struck by the hammer 162, but it is also important to make the swing of the percussion instrument 1 decay as early as possible.

[0110] Therefore, in this embodiment, a structure is adopted to attenuate the oscillation of the percussion instrument 1 after being struck by the cushioning material 170 and the cushioning material 171. The cushioning material 170 and the cushioning material 171 are formed of an elastic material with a specified softness. In addition, in this embodiment, the cushioning material 170 and the cushioning material 171 are mounted (bonded) on the pedal support plate 110, but the cushioning material 170 and the cushioning material 171 can also be mounted on the back of the frame 2.

[0111] The cushioning material 170 is sandwiched between the back of the pedal support plate 110 and the frame 2 at a position higher than the center of the impact surface, and the cushioning material 171 is sandwiched between the back of the pedal support plate 110 and the frame 2 at a position lower than the center of the impact surface.

[0112] That is, the cushioning materials 170 and 171 are arranged in a pair, one above the other, separated by the fixed position P2 (the swing fulcrum of the percussion instrument 1) of the supporting rubber 140 when viewed from the side. Therefore, when the percussion instrument 1 begins to swing due to the strike of the hammer 162, the cushioning material 171, which is in contact with the lower side of the frame 2, is compressed first. Through the elastic restoring force of the cushioning material 171 accompanying the compression, the percussion instrument 1 is pushed back to its initial state.

[0113] When the percussion instrument 1 swings beyond its initial state due to the elastic restoring force of the buffer material 171, the buffer material 170, which is in contact with the back side of the upper end of the frame 2, is compressed. Through the elastic restoring force of the buffer material 170 accompanying the compression, the percussion instrument 1 is pushed back to its initial state. Through this alternating compression of the buffer materials 170 and 171, the swinging of the percussion instrument 1 is attenuated as early as possible, thus effectively reducing the vibration transmitted to the mounting surface S.

[0114] Next, refer to Figures 8-10 The support 200 of the second embodiment will be described. Furthermore, parts identical to those in the first embodiment will be labeled with the same symbols, and their descriptions will be omitted. First, refer to... Figure 8 The overall structure of the support 200 is described. Figure 8 This is a perspective view of the back of the bracket 200 according to the second embodiment.

[0115] like Figure 8As shown, in the bracket 200 of the second embodiment, the foot 220 is fixed to the back of the pedal support plate 210. The foot 220 mainly includes a fixing part 221 that extends in the horizontal direction and is fixed to the back of the pedal support plate 210, and a pair of foot parts 222 that support the two ends of the fixing part 221 in the length direction.

[0116] The fixing part 221 is a metal tube, and a lower tube 223 protruding downward from its lower surface is welded to the fixing part 221. The lower tube 223 extending vertically is also fixed to the back of the pedal support plate 210.

[0117] The foot portion 222 is formed by bending a metal tube. The bent portion is welded to the longitudinal end of the fixing portion 221. One end of the foot portion 222 slopes forward from the fixing portion 221 and contacts the mounting surface further forward than the pedal support plate 210. The other end of the foot portion 222 slopes backward 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 feet 222.

[0118] At the lower end of the pedal support plate 210, similar to the first embodiment, a foot pedal 160 is formed (see reference). Figure 10 The pedal fixing part 111. When the foot pedal 160 strikes the percussion instrument 1, the percussion instrument 1 rotates around the fixing part 221 via the bracket 280. See reference. Figure 9 The details of the structure that causes the percussion instrument 1 to rotate are explained.

[0119] Figure 9 This is an exploded perspective view showing the support 200 with the percussion instrument disassembled. Furthermore, in Figure 9 The diagram shows one of the two sets of sleeves 290a and 290b mounted on the fixing part 221 (located in...). Figure 9 The upper left sleeve is shown in the state where it is clamped into the fixing part 221, and another set of sleeves 290a and 290b (located in the upper left sleeve) are also shown in the figure. Figure 9 The lower right sleeve is detached from the fixing part 221.

[0120] like Figure 9 As shown, a through hole 213 is formed on the pedal support plate 210 to allow the bracket 280 to rotate. The through holes 213 are formed in a pair with a horizontal gap, and the pair of through holes 213 are formed in a position facing the fixing part 221.

[0121] On the fixing part 221, a recess 224 is formed at a position opposite to the through hole 213. The recess 224 is a continuous annular recess covering the entire circumference of the fixing part 221, and the recess 224 is clamped by a pair of (split) sleeves 290a, 290b.

[0122] Sleeves 290a and 290b are components used to reduce the rotational resistance of the bracket 280 relative to the fixed part 221. Since sleeves 290a and 290b are essentially the same structure, the structure of each part of sleeve 290a will be described below, while the description of sleeve 290b will be omitted.

[0123] Sleeve 290a is formed into a semi-cylindrical shape using a self-lubricating synthetic resin (such as fluororesin, polyacetal, polyamide, etc.), and an inner protrusion 291 is formed on the inner circumferential surface of sleeve 290a. The inner protrusion 291 is a protrusion extending circumferentially along the inner circumferential surface of sleeve 290a, and when a pair of sleeves 290a and 290b are clamped into the fixing part 221, the inner protrusion 291 is embedded into the recess 224. As a result, the displacement of sleeves 290a and 290b (support 280) along the length direction (axial direction) of fixing part 221 is restricted.

[0124] An outer protrusion 292 (protrusion) extending circumferentially is formed on the outer peripheral surface of the sleeve 290a, and the outer protrusion 292 is used to limit the displacement of the bracket 280 relative to the sleeve 290a and the sleeve 290b.

[0125] The bracket 280 includes a first bracket 281 fixed to the back of the frame 2 of the percussion instrument 1, and a second bracket 282 that, together with the first bracket 281, clamps the sleeves 290a and 290b.

[0126] The first bracket 281 includes a fixed portion 281a fixed to the back of the frame 2. The fixed portion 281a extends horizontally and its two ends are fixed to the frame 2 by bolts B5. A clamping portion 281b for clamping sleeves 290a and 290b extends vertically from the central portion of the fixed portion 281a in the horizontal direction. The fixed portion 281a and the clamping portion 281b are integrally formed using resin material.

[0127] A pair of clamping portions 281b extend rearward from the fixed portion 281a, and 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 along the outer peripheral surface of the sleeves 290a and 290b, and approximately half of the outer peripheral surface of the pair of sleeves 290a and 290b is clamped by the clamping surface 281c.

[0128] A fastening hole 281d is formed on each of the upper and lower clamping portions 281b, and the second bracket 282 is fixed to the first bracket 281 by means of the fastening holes 281d. The second bracket 282 includes a clamping portion 282a of a clamping sleeve 290a and a clamped portion 282b of the sleeve 290b, and a fastened portion 282b that is fastened to the first bracket 281. These portions 282a and 282b are integrally formed using resin material.

[0129] An arc-shaped clamping surface 282c is formed on the clamping part 282a, which runs along the outer circumferential surface of the sleeves 290a and 290b. A pair of fastened parts 282b are formed on the upper and lower end sides of the clamping part 282a, and an insertion hole 282d is formed on each of the pair of fastened parts 282b.

[0130] With sleeves 290a and 290b clamped in place by the clamping surfaces 281c and 282c of the first bracket 281 and the second bracket 282, the bolt B6, inserted into the insertion hole 282d, is tightened into the fastening hole 281d, thereby clamping sleeves 290a and 290b by the bracket 280. Thus, the percussion instrument 1 (frame 2) is rotatably supported on the fixing part 221 via the bracket 280 and sleeves 290a and 290b.

[0131] A groove 281e (corresponding in shape to the outer protrusion 292) extending circumferentially is formed on the clamping surface 281c of the first bracket 281. The groove 281e is a continuous groove-shaped recess along the circumferential direction of the clamping surface 281c. Although not shown in the figure, the same groove is also formed on the clamping surface 282c of the second bracket 282. By inserting the outer protrusions 292 of the sleeves 290a and 290b into the grooves 281e of these brackets 281 and 282, the displacement of the bracket 280 (percussion instrument 1) along the axial direction of the sleeves 290a and 290b (fixed part 221) is restricted.

[0132] Furthermore, in this embodiment, since the sleeves 290a and 290b are firmly clamped into each of the brackets 281 and 282, the bracket 280 cannot rotate relative to the sleeves 290a and 290b. On the other hand, the sleeves 290a and 290b can rotate relative to the fixing part 221, but are not necessarily limited to this.

[0133] For example, a structure could be constructed in which sleeves 290a and 290b are fixed in a way that prevents them from rotating relative to the fixing part 221, while the bracket 280 can rotate relative to sleeves 290a and 290b. Alternatively, a structure could be constructed in which each relative rotation is possible: relative rotation of sleeves 290a and 290b relative to the fixing part 221, and relative rotation of the bracket 280 relative to sleeves 290a and 290b.

[0134] Thus, in this embodiment, the percussion instrument 1 is rotatably (swingingly) supported on the fixing part 221 of the bracket 200. (See reference...) Figure 10 The description explains the situation where the percussion instrument 1 is struck by the foot pedal 160, but it is also appropriate to refer to Figure 9 Please provide an explanation.

[0135] Figure 10 This is a side view of the support 200 showing the percussion instrument 1 being struck by the hammer 162. Furthermore, in Figure 10 In the text, one of the two feet 222 is omitted. Figure 10 The illustration is shown at the foot 222 (vertical direction near the front of the paper).

[0136] like Figure 10 As shown, with the foot pedal 160 supported on the pedal fixing part 111 of the pedal support plate 210, the percussion instrument 1 is struck by the hammer 162 by stepping on the pedal 161.

[0137] Because the frame 2 (frame) of the percussion instrument 1 is connected to the bracket 280 and sleeves 290a and 290b (regarding the sleeves, see...) Figure 9 The percussion instrument 1 is rotatably supported on the fixed part 221 of the foot 220, so when the hammer 162 strikes the percussion instrument 1, the percussion instrument 1 swings relative to the support 200 (pedal support plate 210 or foot 220). This swinging of the percussion instrument 1 absorbs the impact of the strike from the hammer 162. Therefore, when the hammer 162 strikes the percussion instrument 1, the vibration transmitted to the mounting surface S via various parts of the support 200 (pedal support plate 210 or foot 220, etc.) can be reduced.

[0138] If Figure 10 The center of the fixed part 221 shown is set as the rotation center C2 of the percussion instrument 1, and the rotation center C2 (oscillation fulcrum) is located at a different height from the center of the striking surface in the vertical direction. Therefore, the percussion instrument 1 can receive the strike of the hammer 162 at a different height from the oscillation fulcrum of the percussion instrument 1, thus the percussion instrument 1 can easily oscillate relative to the support 200. Consequently, the impact of the strike by the hammer 162 is easily absorbed, thus effectively reducing the vibration transmitted to the setting surface S.

[0139] Furthermore, similar to the first embodiment, since the direction of the strike by the hammer 162 is mostly a downward tilting direction towards the rear and lower side of the percussion instrument 1 (towards... Figure 10(in the lower left direction), therefore, in this embodiment, the rotation center C2 of the percussion instrument 1 is also set above the center of the striking surface. Thus, compared to the case where the rotation center C2 is located below the center of the striking surface, the percussion instrument 1 can rotate more easily around the fixing part 221, and the load applied to the support part (such as the bracket 280) of the percussion instrument 1 can be reduced. Therefore, vibrations transmitted to the setting surface S can be effectively reduced, and damage to parts in the support part of the percussion instrument 1 can be suppressed.

[0140] Furthermore, in this embodiment, the same buffer material 170 and buffer material 171 as in the first embodiment are also provided. These buffer materials 170 and 171 are arranged in a pair, one above the other, across the rotation center C2 of the percussion instrument 1 when viewed from the side. Thus, similar to the first embodiment, the oscillation of the percussion instrument 1 can be attenuated as early as possible by means of the buffer material 170 and buffer material 171, thereby effectively reducing the vibration transmitted to the setting surface S.

[0141] Furthermore, if the percussion instrument 1 is mounted in a structure that allows it to rotatably around the fixing part 221 (rotation axis) as in this embodiment, the percussion instrument 1 can swing smoothly compared to the case where the percussion instrument 1 is supported by the support rubber 140 to make it swingable, as in the first embodiment. Therefore, the impact of the strike by the hammer 162 is easily absorbed, thus effectively reducing the vibration transmitted to the mounting surface S.

[0142] Here, if the purpose is to allow the percussion instrument 1 to rotate more smoothly relative to the support 200, components such as bearings may be considered. As an example, a structure could be illustrated as follows: a rolling bearing with rolling elements spaced between the inner and outer rings is used, with the inner ring fixed on the fixing part 221 side and the outer ring fixed on the frame 2 side. Using such bearings or similar components increases the product cost because the mounting structure of the bearing relative to the fixing part 221 (support 200) or the frame 2 (percussion instrument 1) becomes more complex.

[0143] In contrast, in this embodiment, a bracket 280 is rotatably mounted on the outer peripheral surface of the fixing part 221 (the cylindrical tube), and the bracket 280 is fixed to the frame 2. Thus, the percussion instrument 1 can be rotatably supported using the tube itself constituting the support 200. Therefore, compared to the case where bearings and other parts are used as described above, the product cost of the support 200 can be reduced.

[0144] Furthermore, when the purpose is to support the percussion instrument 1 rotatably using the fixing part 221, the fixing part 221 can be directly clamped in by the bracket 280, for example. However, by using bolt B5 (see...) Figure 9The bracket 280, which is fastened to the frame 2, requires a relatively rigid resin material, making it difficult to use a resin material with high self-lubricating properties. Therefore, if the bracket 280 is directly clamped into the fixing part 221, it is difficult to simultaneously ensure that the bracket 280 is stably (firmly) fixed to the frame 2 and ensure that the bracket 280 can slide relative to the fixing part 221.

[0145] In contrast, in this embodiment, sleeves 290a and 290b, made of a resin material with higher self-lubricating properties than the bracket 280, are rotatably mounted on the outer peripheral surface of the fixing part 221, and are held by the bracket 280. Therefore, even when the bracket 280 is made of a resin material with relatively high rigidity, sliding relative to the fixing part 221 can be ensured by the sleeves 290a and 290b. Thus, while the frame 2 can be stably (firmly) fixed to the bracket 280, the percussion instrument 1 can rotate smoothly relative to the fixing part 221.

[0146] Furthermore, when the percussion instrument 1 rotates relative to the fixing part 221, the recess 224 formed on the outer peripheral surface of the fixing part 221 (see reference) Figure 9 ) and the inner protrusion 291 formed on the inner circumferential surface of sleeve 290a and sleeve 290b (refer to Figure 9 The sleeves 290a and 290b are restricted from axial displacement in the fixing part 221 by the clamping mechanism. As a result, for example, compared to forming a protrusion on the outer peripheral surface of the fixing part 221 to restrict such displacement (forming a recess on the sleeves 290a and 290b to embed the protrusion), the processing cost of the fixing part 221 (tube) can be reduced.

[0147] Next, refer to Figure 11 and Figure 12 The support 300 of the third embodiment will be described. Furthermore, parts identical to those in the other embodiments will be labeled with the same symbols, and their descriptions will be omitted. Figure 11 This is a perspective view of the back of the bracket 300 according to the third embodiment. Figure 12 This is a side view of the support 300 showing the state of the percussion instrument 1 being struck by the hammer 162. Furthermore, in Figure 11 In the middle, the following was omitted. Figure 12 The buffer material 373 shown in the illustration is in... Figure 12 In the text, one of the two feet 222 is omitted. Figure 12 The illustration is shown at the foot 222 (vertical direction near the front of the paper).

[0148] like Figure 11As shown, the bracket 300 of the third embodiment includes a U-shaped mounting plate 314 on which the percussion instrument 1 is mounted. The mounting plate 314 includes a first vertical portion 314a extending vertically (upward) from the upper end of the pedal support plate 310, a curved portion 314b bending forward from the upper end of the first vertical portion 314a, and a second vertical portion 314c extending vertically (downward) from the front end of the curved portion 314b. These portions 314a to 314c are integrally formed using a metal plate.

[0149] The curved portion 314b is a curved shape that protrudes upwards. The mounting plate 314 functions as a U-shaped leaf spring (U-shaped spring) primarily through the elastic deformation of the curved portion 314b. The second vertical portion 314c extends further downwards than the first vertical portion 314a and faces the pedal support plate 310. The back of the frame 2 is fixed to the second vertical portion 314c. The mounting plates 314 are arranged in a pair at horizontal intervals, and a percussion instrument 1 is mounted on each of the pair of mounting plates 314.

[0150] like Figure 12 As shown, with the foot pedal 160 supported on the pedal fixing part 111 of the pedal support plate 310, the percussion instrument 1 is struck by the hammer 162 by stepping on the pedal 161.

[0151] Since the frame 2 (frame) of the percussion instrument 1 is swayably supported on the U-shaped mounting plate 314, when the hammer 162 strikes the percussion instrument 1, the percussion instrument 1 sways relative to the support 300 (pedal support plate 310 and foot 220) due to the elastic deformation of the mounting plate 314. This swaying of the percussion instrument 1 absorbs the impact of the strike from the hammer 162. Therefore, when the hammer 162 strikes the percussion instrument 1, the vibration transmitted to the mounting surface S via various parts of the support 300 (pedal support plate 310 or foot 220, etc.) can be reduced.

[0152] If the curved portion 314b of the mounting plate 314 is set as the swing fulcrum P3 of the percussion instrument 1, then the swing fulcrum P3 is located at a different height from the center of the striking surface in the vertical direction. Therefore, the percussion instrument 1 can receive the impact of the hammer 162 at a different height from the swing fulcrum P3, thus making it easier for the percussion instrument 1 to swing relative to the support 300. Consequently, the impact of the strike by the hammer 162 is easily absorbed, thus effectively reducing the vibration transmitted to the mounting surface S.

[0153] Furthermore, similar to the first embodiment, since the direction of the strike by the hammer 162 is mostly a downward tilting direction towards the rear and lower side of the percussion instrument 1 (towards... Figure 12(in the lower left direction), therefore, in this embodiment, the swing fulcrum P3 of the percussion instrument 1 is also set above the center of the striking surface. Thus, compared to the case where the swing fulcrum P3 is located below the center of the striking surface, the percussion instrument 1 swings more easily due to the elastic deformation of the mounting plate 314. Therefore, the vibration transmitted to the mounting surface S can be effectively reduced.

[0154] A damping material 373 for damping the vibration of the percussion instrument 1 is mounted on the mounting plate 314. The damping material 373 is formed of an elastic material with a specified softness. The damping material 373 is sandwiched between the pedal support plate 310 and the first vertical portion 314a and the second vertical portion 314c. In addition, the damping material 373 is bonded to the pedal support plate 310 and the first vertical portion 314a, but it may also be bonded to the second vertical portion 314c. Furthermore, although not shown in the figure, the damping material 373 is mounted on each of the left and right pairs of mounting plates 314.

[0155] By inserting a buffer material 373 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 due to the elastic deformation of the mounting plate 314 when the percussion instrument 1 is struck. The elastic restoring force of the buffer material 373 resulting from this compression attenuates the oscillation of the percussion instrument 1, thus effectively reducing the vibration transmitted to the mounting surface S.

[0156] Furthermore, by oscillatingly supporting the percussion instrument 1 on the mounting plate 314 containing the U-shaped metal plate, the percussion instrument 1 can be oscillating without using parts such as bracket 280 or sleeves 290a, sleeves 290b as in the second embodiment.

[0157] Thus, when the percussion instrument 1 is supported in a swingable manner by the mounting plate 314, the mounting plate 314 can also be fixed to the foot 220 (fixed part 221) or the pedal support plate 310, for example. In contrast, in this embodiment, the mounting plate 314 is integrally formed with the pedal support plate 310, which is made of a metal plate. As a result, the pedal support plate 310 and the mounting plate 314 can be formed by bending a single metal plate. Furthermore, compared to the case where the pedal support plate 310 and the mounting plate 314 are separate parts, the number of parts can be reduced.

[0158] The above description is based on the embodiments described, but the present invention is not limited to any of the embodiments described, and it is easy to deduce that various modifications and variations can be made without departing from the spirit of the present invention.

[0159] In the various embodiments described, the percussion instrument 1 is an electronic percussion instrument including the drumhead sensor 3. However, for example, the honeycomb structure based on the recess 20a and through hole 20b of the bottom surface (support 20) of the frame 2, or the support structure of the percussion instrument based on the bracket 100, bracket 200, and bracket 300, can also be applied to acoustic percussion instruments (drums without sensors). Furthermore, as long as it can be applied to other percussion instruments other than the bass drum (e.g., snare drum or tom-tom), the structures described in the various embodiments can also be applied to other percussion instruments.

[0160] In the various embodiments described, a first buffer pad 5 and a second buffer pad 6, which are softer than the frame 2, are shown sandwiched between the support 20 and the drumhead 4, but this is not a limitation. For example, either or both of the first buffer pad 5 and the second buffer pad 6 may be omitted. If either the first buffer pad 5 or the second buffer pad 6 is omitted, the thickness of the other buffer pad can be increased to make it contact the drumhead 4.

[0161] In the various embodiments described, the case where the first buffer pad 5 is a single-layer buffer pad and the second buffer pad 6 is a three-layer (multi-layer) buffer pad is explained, but the first buffer pad 5 can be multi-layered and the second buffer pad 6 can be a single-layered buffer pad.

[0162] In the various embodiments described, it is shown that a plurality of vent holes 51 and 61 are formed on the first buffer pad 5 and the second buffer pad 6, but this is not necessarily the case. For example, the vent holes 51 and 61 may be omitted from either or both of the first buffer pad 5 and the second buffer pad 6.

[0163] Although descriptions have been omitted in the various embodiments, at least a portion of the vent holes 51 of the first buffer pad 5 may be formed in a position connected to the vent hole 61 of the second buffer pad 6, or all of the vent holes 51 may be formed in a position connected to the vent hole 61. Alternatively, all of the vent holes 51 may be formed in a position not connected to the vent hole 61.

[0164] The same applies to the vent holes 61 formed in each of the three layers of cushioning pads constituting the second cushioning pad 6. At least a portion of the vent holes 61 may be formed in positions connected to the vent holes 51 and 61 of another cushioning pad (the cushioning pad overlapping itself), or all of the vent holes 61 may be formed in positions connected to the vent holes 51 and 61 of another cushioning pad. Alternatively, all of the vent holes 61 may be formed in positions not connected to the vent holes 51 and 61 of another cushioning pad.

[0165] That is, when the four layers of buffer pads 5 and 6 (the first elastomer and the second elastomer) are understood as a single buffer pad (elastomer), the vent holes 51 and 61 can be connected continuously or intermittently to the surface (the side facing the drumhead 4) and the back (the side facing the support 20) of the buffer pad.

[0166] In the various embodiments described, it is explained that the opening ratio of the vent hole 51 in the portion of the first buffer pad 5 that overlaps with the impacted area R1 in the axial direction of the cylinder 22 is lower than that of the vent hole 51 in the portion of the cylinder 22 that overlaps with the non-impacted area in the axial direction of the cylinder 22, but this is not necessarily the case. For example, it is also possible for the vent hole 51 in the portion of the first buffer pad 5 that overlaps with the impacted area R1 in the axial direction of the cylinder 22 to have a higher opening ratio (or the opening ratios are the same) than that of the vent hole 51 in the portion of the cylinder 22 that overlaps with the non-impacted area in the axial direction of the cylinder 22.

[0167] In the various embodiments described, the hardness of the first buffer pad 5 is lower than that of the second buffer pad 6, but this is not necessarily the case. For example, the hardness of the first buffer pad 5 may be higher than that of the second buffer pad 6, or they may have the same hardness.

[0168] In the various embodiments described, a structure was described in which the opening ratio of the vent hole 51 in the first buffer pad 5 is different from the opening ratio of the vent hole 61 in the second buffer pad 6, that is, the opening ratio of the vent hole 51 relative to the area of ​​the first buffer pad 5 is smaller than the opening ratio of the vent hole 61 relative to the area of ​​the second buffer pad 6, but this is not necessarily limited to this. For example, the opening ratio of the vent hole 51 relative to the area of ​​the first buffer pad 5 may be larger than the opening ratio of the vent hole 61 relative to the area of ​​the second buffer pad 6, and their opening ratios may also be the same.

[0169] In the various embodiments described, a membrane member 7 with a lower coefficient of friction than the first buffer pad 5 and the second buffer pad 6 is shown sandwiched between the first buffer pad 5 and the second buffer pad 6, or between the support portion 20 and the second buffer pad 6, but this is not a limitation. For example, the membrane member 7 may be omitted, and if the first buffer pad 5 (second buffer pad 6) is composed of multiple layers of buffer pads as described above, the membrane member 7 may also be sandwiched between these buffer pads. Furthermore, the coefficient of friction of the membrane member 7 may also be higher than that of the first buffer pad 5 and the second buffer pad 6.

[0170] In the various embodiments described, a plurality of regular hexagonal recesses 20a and through holes 20b are arranged in a planar filling manner on the bottom surface (support portion 20) of the frame 2, but this is not necessarily the case. For example, the shapes of the recesses 20a and through holes 20b may also be equilateral triangles, squares, or other polygons (e.g., parallelograms or arbitrary quadrilaterals). Furthermore, recesses 20a and through holes 20b of different shapes may also be planar filled.

[0171] In the embodiments described above, it is shown that the bottom wall 20c and the side wall 20d of the support portion 20 are integrally formed using a resin material, but this is not necessarily the case. For example, the flat bottom wall 20c, which is separately formed from the support portion 20 (side wall 20d), may also be fixed to the support portion 20 (side wall 20d) by means of adhesive bonding or the like.

[0172] In the various embodiments described, it is explained that the bottom of the recess 20a is completely blocked by the bottom wall 20c, while the bottom wall 20c is not formed in the through hole 20b, but it is not necessarily limited to this. For example, a structure in which a hole is formed that penetrates part of the bottom wall 20c of the recess 20a (or a part of the bottom of the through hole 20b is blocked) may also be adopted. Even with such a structure, it can be said that "the recess 20a (hole) penetrates the support portion 20 (bottom surface of the frame)".

[0173] In the embodiments described, the case where the wall portion 82 is not formed in the region between the drumhead sensor 3 and the struck area R1 (the center C1 of the striking surface) is explained, but it is not necessarily limited to this. For example, a structure in which the wall portion 82 surrounds the entire circumference of the drumhead sensor 3 may also be used, or a structure in which the wall portion 82 is formed in the region between the drumhead sensor 3 and the struck area R1 (the center C1 of the striking surface).

[0174] In the embodiments described above, the wall portion 82 is formed as an arc shape centered on the center C1 of the drumhead 4 (an arc shape along the circumference of the cylinder portion 22), but it is not necessarily limited to this. For example, the wall portion 82 may be formed as a circle surrounding the entire circumference of the drumhead sensor 3 as described above, or the wall portion 82 may be formed as a polygon (e.g., a quadrilateral ring).

[0175] That is, as long as the structure can increase the tension of the drumhead 4 around the drumhead sensor 3, the position (the area in contact with the drumhead 4) or shape of the forming wall portion 82 can be appropriately set. Therefore, for example, it is also possible to... Figure 4 As shown by the imaginary line V in (a), the wall portion 82 extending toward the struck area R1 comes into contact with the drumhead 4. Alternatively, the wall portion 82 may be formed at each of the positions shown by the imaginary line V and the position shown by the dashed line in the figure.

[0176] In the embodiments described, a region R2 with a constant height of the wall portion 82 is presented in the extending direction of the wall portion 82, but this is not necessarily the case. For example, there may be no region R2 with a constant height of the wall portion 82, and the height of the wall portion 82 may vary throughout the wall portion 82 in the extending direction (for example, the height gradually decreases as it approaches both ends of the extending direction of the wall portion 82).

[0177] In the embodiments described above, a wall portion 82 is formed on the mounting member 8 that is detachably mounted on the support portion 20, but this is not a limitation. For example, the wall portion 82 may be integrally formed with the support portion 20. Furthermore, although the case where the drumhead sensor 3 is supported on the mounting member 8 has been described, the member supporting the drumhead sensor 3 and the member having the wall portion 82 may be different parts. That is, the support portion 20 may support the drumhead sensor 3 via the mounting member 8, or it may support the drumhead sensor 3 directly without via the mounting member 8.

[0178] In the various embodiments described, the fixed positions P1 and P2 of the support rubber 140 relative to the pedal support plate 110, pedal support plate 210, pedal support plate 310 and frame 2, the rotation center C2 of the percussion instrument 1, and the swing fulcrum P3 of the percussion instrument 1 are described as being located at a different height from the center of the striking surface in the vertical direction, that is, the swing fulcrum of the percussion instrument 1 is located above the center of the striking surface, but it is not necessarily limited to this. For example, the swing fulcrum of the percussion instrument 1 can be located below the center of the striking surface, or the swing fulcrum of the percussion instrument 1 can be at the same height as the center of the striking surface.

[0179] In the various embodiments described, it is explained that cushioning materials 170, 171, and 373 are sandwiched between the pedal support plate 110, pedal support plate 210, pedal support plate 310 and the percussion instrument 1, but this is not necessarily the case. For example, in the first and third embodiments, cushioning materials 170, 171, and 373 may be omitted (in the second embodiment, since cushioning materials 170 and 171 have the function of maintaining the initial state of the percussion instrument 1 before striking, it is preferable not to omit cushioning materials 170 and 171). Furthermore, the positions of the cushioning materials 170, 171, and 373 can be changed, and other cushioning materials may be added to the cushioning materials 170, 171, and 373.

[0180] In the first embodiment, the case where the percussion instrument 1 is fixed to the front surface of the pedal support plate 110 via the support rubber 140 is described, but it is not necessarily limited to this. For example, the support rubber 140 may also be fixed to the front leg 120 (fixing part 121) or the rear leg 130 (fixing part 131) of the bracket 100. In this case, it is sufficient to form a through hole in the pedal support plate 110 for mounting the support rubber 140. Furthermore, if other components besides the pedal support plate 110 or the legs 120 and 130 are provided on the bracket 100, the support rubber 140 may also be fixed to these other components.

[0181] In the first embodiment, a structure is described in which the fixing position P2 of the support rubber 140 relative to the frame 2 is located higher than the fixing position P1 of the support rubber 140 relative to the pedal support plate 110, that is, the fixing position P2 is farther away from the center of the striking surface compared to the fixing position P1, but it is not necessarily limited to this. For example, a structure in which the fixing position P2 is located lower than the fixing position P1, or a structure in which the fixing position P2 is closer to the center of the striking surface compared to the fixing position P1.

[0182] In the second embodiment, a bracket 280 is described as being rotatably mounted on the outer peripheral surface of the fixing part 221 (cylindrical tube), and the bracket 280 is fixed to the frame 2 (percussion instrument 1), but this is not necessarily the case. For example, known parts (bearings, etc.) that support rotation can be used to rotatably support the percussion instrument 1 on the support 200. Furthermore, in the second embodiment, a sleeve 290a and a sleeve 290b are described as being spaced between the fixing part 221 and the bracket 280, but the sleeve 290a and the sleeve 290b can be omitted, and the bracket 280 can be directly clamped into the fixing part 221.

[0183] In the second embodiment, the displacement of sleeves 290a and 290b is limited by the engagement of a recess 224 formed on the outer peripheral surface of the fixing portion 221 and an inner protrusion 291 formed on the inner peripheral surface of sleeves 290a and 290b, but this is not necessarily the case. For example, a protrusion limiting the displacement of sleeves 290a and 290b may be formed on the outer peripheral surface of the fixing portion 221, while a recess that embeds the protrusion may be formed on sleeves 290a and 290b.

[0184] In the third embodiment, a structure in which the mounting plate 314 and the pedal support plate 310, which is made of a metal plate, are integrally formed is described, i.e., the pedal support plate 310 and the mounting plate 314 are formed by bending a single metal plate, but this is not necessarily the case. For example, the mounting plate 314 and the pedal support plate 310 may be treated as separate parts, with the mounting plate 314 fixed to the foot 220 (fixing part 221) or the pedal support plate 310. Furthermore, if other components besides the pedal support plate 310 or the foot 220 (fixing part 221) are provided on the bracket 300, the mounting plate 314 may also be fixed to these other components.

[0185] Explanation of icon numbers

[0186] 1: Percussion instruments

[0187] 2: Frame (box)

[0188] 20: Support section (bottom surface of the frame)

[0189] 20a: Recess (hole)

[0190] 20b: Through hole (hole)

[0191] 20c: Bottom wall

[0192] 20d: Sidewall

[0193] 22: Cylinder section

[0194] 4: Drumhead

[0195] 5: First buffer pad (first elastomer) (elastomer)

[0196] 51: Vent

[0197] 6: Second buffer pad (second elastomer) (elastomer)

[0198] 61: Vent

[0199] 7: Membrane components

[0200] R1: Area under attack (Area 1)

Claims

1. A percussion instrument, characterized in that, include: The drumhead forms the striking surface; And a frame, having a cylindrical portion with an opening covered by the drumhead, The frame includes a plurality of polygonal holes formed on the bottom surface of the inner circumference side of the cylindrical portion, arranged such that their edges are adjacent to each other. At least a portion of the plurality of holes penetrates the bottom surface of the frame.

2. The percussion instrument according to claim 1, characterized in that, On the bottom surface of the frame, a plurality of holes of the same shape are formed in a planar filling manner.

3. The percussion instrument according to claim 2, characterized in that, By forming the plurality of holes into a regular hexagonal shape, the bottom surface of the frame is formed into a honeycomb structure.

4. The percussion instrument according to claim 1, characterized in that, A plurality of holes are formed in an area covering more than 60% of the area of ​​the portion located on the inner circumferential side of the cylindrical part on the bottom surface of the frame.

5. The percussion instrument according to claim 1, characterized in that, Some of the holes are through holes that penetrate the frame, while the other holes are recesses formed on the bottom surface of the frame.

6. The percussion instrument according to claim 5, characterized in that, The bottom wall of the recess is integrally formed with the side wall that divides the recess and the through hole.

7. The percussion instrument according to claim 1, characterized in that, Includes an elastic body held between the bottom surface of the frame and the drumhead. The elastomer includes vent holes to ensure ventilation from the drumhead side to the bottom side of the frame.

8. The percussion instrument according to claim 7, characterized in that, Includes a membrane-like component layered between the elastomer and the bottom surface of the frame. A plurality of vent holes smaller than the orifice are formed on the membrane component.

9. The percussion instrument according to claim 7, characterized in that, When the impacted area on the central side of the elastomer is defined as the first region, and the area surrounding the first region on its outer periphery is defined as the second region,... The opening ratio of the vent in the first region is lower than that of the vent in the second region.

10. The percussion instrument according to claim 7, characterized in that, The elastomer includes at least a first elastomer layered on the drumhead side and a second elastomer layered between the first elastomer and the bottom surface of the frame.

11. The percussion instrument according to claim 10, characterized in that, The first elastomer is formed to be softer than the second elastomer.

12. The percussion instrument according to claim 10, characterized in that, Includes a membrane-like component stacked between the first elastomer and the second elastomer. A plurality of vent holes smaller than the vent holes of the first elastomer and the second elastomer are formed on the membrane component.

13. The percussion instrument according to claim 12, characterized in that, The membrane component is formed with a lower coefficient of friction than the first elastomer and the second elastomer.

14. The percussion instrument according to claim 10, characterized in that, The opening ratio of the vent in the first elastomer is different from that of the vent in the second elastomer.

15. The percussion instrument according to claim 14, characterized in that, The opening ratio of the vent in the first elastomer is lower than that of the vent in the second elastomer.

16. A method for reinforcing a frame, specifically a method for reinforcing the frame of a percussion instrument, the percussion instrument comprising: The drumhead forms the striking surface; And a frame, having a cylindrical portion with an opening at one end covered by the drumhead, the method of reinforcing the frame being characterized in that... On the bottom surface of the frame located on the inner periphery of the cylindrical portion, a plurality of polygonal holes are formed in such a way that their edges are adjacent to each other. At least a portion of the plurality of holes penetrate the bottom surface of the frame.

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