Protection method of drum patch and drum head

Abstract

To provide a drum patch that can inhibit peeling from a hitting surface, and a method for protecting the hitting surface using the drum patch.SOLUTION: A drum patch 1, which is formed in a sheet form, is bonded to a striking surface 106a of a drum 100. First slits 10 and second slits 20, which extend toward a striking area R1, are formed on the outer edge of the drum patch 1, so relatively flexible deformation is possible at the outer edge. This allows the outer edge of the drum patch 1 to absorb deformation that causes the outer edge to lift off the striking surface 106a by each slit 10 and 20, when the striking area R1 is struck. Therefore, it is possible to prevent the drum patch 1 from peeling off the striking surface 106a.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a drum patch and a method for protecting a striking surface, and more particularly to a drum patch that is capable of preventing peeling off from the striking surface and a method for protecting the striking surface using the drum patch. [Background technology]

[0002] There is a technology for adjusting the striking sound generated when a drum is struck and protecting the striking surface from shock when struck by attaching a sheet-shaped drum patch to the striking surface of the drum (for example, Patent Document 1). This type of drum patch is generally attached to the striking surface with an adhesive or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 5,986,196 (e.g., FIG. 1) Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned conventional technology has a problem in that the drum patch is easily peeled off from the striking surface due to the impact when struck.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a drum patch that can be prevented from peeling off from the striking surface, and a method of protecting the striking surface using such a drum patch. [Means for solving the problem]

[0006] To achieve this object, the drum patch of the present invention is a drum patch formed in a sheet shape that can be adhered to the striking surface of the drum, and has a slit formed on the outer edge that extends toward the struck area that receives the strike.

[0007] The method for protecting the striking surface of the present invention is a method for protecting the striking surface of a drum using a drum patch formed in a sheet-like shape, and the drum patch has a slit formed on its outer edge extending toward the struck area that receives the strike, and is adhered to the striking surface. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a drum on which a drum patch according to a first embodiment is attached. [Diagram 2] FIG. 2 is a front view of the drum patch of the first embodiment. [Diagram 3] FIG. 11 is a front view of a drum patch according to a second embodiment. [Figure 4] FIG. 13(a) is a front view of a drum patch according to a third embodiment, and FIG. 13(b) is a front view of a drum patch according to a fourth embodiment. [Diagram 5] FIG. 13(a) is a front view of a drum patch according to a fifth embodiment, and (b) is a front view of a drum patch according to a sixth embodiment. [Figure 6] FIG. 13 is a front view of the drum patch of the seventh embodiment. [Figure 7] FIG. 13 is a front view of the drum patch of the eighth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. First, a drum patch 1 of a first embodiment will be described with reference to Fig. 1. Fig. 1 is a perspective view of a drum 100 to which the drum patch 1 of the first embodiment is attached, and Fig. 2 is a front view of the drum patch 1. Note that Fig. 1 illustrates the drum patch 1 with a part cut away.

[0010] As shown in Fig. 1, the drum 100 to which the drum patch 1 is attached is a percussion instrument (bass drum) in which the opening at the axial end of a cylindrical shell 101 is covered with a head 102. The head 102 is formed into a disk shape using a synthetic resin film, and is attached to the shell 101 by an annular hoop 103.

[0011] The hoop 103 has through holes (not shown) formed at multiple locations in the circumferential direction, and tension bolts 104 are inserted into these through holes. The outer peripheral surface of the shell 101 is provided with multiple lugs 105, and with the outer edge of the head 102 hooked onto the hoop 103, tension is applied to the head 102 by screwing the tension bolts 104 into the lugs 105.

[0012] A through hole (not shown) is formed in the head 102, and a disk-shaped attachment 106 is attached to this through hole. The attachment 106 is a sound-reducing tool for reducing the impact sound generated when the head 102 is struck, and a mesh striking surface 106a is formed on the surface of the attachment 106.

[0013] Although not shown in the figure, the striking surface 106a is placed on a pad (cushion) made of soft polyurethane, and a sensor (piezo element) that detects vibrations of a strike on the striking surface 106a is attached to the attachment 106. Note that a known configuration can be adopted for this attachment 106, and an example of a known configuration is the struck part 40 in International Publication No. 2017 / 038226.

[0014] The striking surface 106a of the attachment 106 is struck by a foot pedal 110. The foot pedal 110 is of a single pedal type that includes a pedal 111 that is depressed by the player, and a beater 112 that rotates when the pedal 111 is depressed.

[0015] When a strike by the beater 112 is detected by a sensor on the attachment 106, a musical sound signal based on the detection result is generated by a sound source (not shown). The musical sound signal is output to an amplifier and a speaker (both not shown), and electronic musical sounds are emitted from the speaker. In other words, the drum 100 is configured as an electronic drum.

[0016] A drum patch 1 is attached to the striking surface 106a of the attachment 106 at a position that receives the strike from the beater 112. The drum patch 1 is a film-like member that protects the striking surface 106a from the shock caused by the strike of the beater 112, and covers substantially the entire striking surface 106.

[0017] 2, the drum patch 1 is formed in a circular shape when viewed from the front, and a first slit 10 having a relatively shallow cut depth and a second slit 20 having a deeper cut depth than the first slit 10 are formed on the outer edge of the drum patch 1. Note that a "slit" is a cut whose longitudinal dimension is longer than its width dimension (e.g., 1.5 to 2 times or more), and this also applies to other embodiments described later.

[0018] A plurality of first slits 10 (32 in this embodiment) are formed in a direction around the outer periphery (hereinafter referred to as the "circumferential direction") of the drum patch 1. The intervals between the plurality of first slits 10 in the circumferential direction are constant.

[0019] A plurality of second slits 20 (four in this embodiment) are formed in the circumferential direction of the drum patch 1, and the intervals between the plurality of second slits 20 in the circumferential direction are constant. That is, the second slits 20 are formed at positions that equally divide the plurality of first slits 10 (into four).

[0020] In the following description, an imaginary circle tangent to the edge of each second slit 20 in a front view of the drum patch 1 is defined as the struck area R1, and the struck area R1 side is defined as the tip side of each slit 10, 20. Note that the struck area R1 is the area expected to be struck by the beater 112 (see FIG. 1), but the outside of the struck area R1 may also be struck.

[0021] When the beater 112 strikes the struck area R1 of the drum patch 1, the struck area R1 of the drum patch 1 is deformed so as to be recessed. Therefore, for example, if the slits 10, 20 are not formed in the drum patch 1, when the struck area R1 is struck, the entire drum patch 1 is deformed so as to be wavy, and the outer edge of the drum patch 1 rises from the striking surface 106a (see FIG. 1) and becomes easily peeled off.

[0022] In contrast, in this embodiment, the first slit 10 and the second slit 20 extending toward the struck area R1 are formed on the outer edge of the drum patch 1, so that the outer edge portion can deform relatively flexibly. In other words, when the struck area R1 is struck, the slits 10 and 20 can absorb deformation that causes the outer edge portion of the drum patch 1 to lift off the striking surface 106a. This makes it possible to prevent the drum patch 1 from peeling off the striking surface 106a.

[0023] Furthermore, since the entire striking area R1 is surrounded by a plurality of first slits 10 and second slits 20, deformation such as the outer edge of the drum patch 1 lifting off the striking surface 106a can be suppressed over the entire circumference of the drum patch 1, regardless of the striking position of the beater 112 in the striking area R1.

[0024] In addition, since the first slit 10 and the second slit 20 each extend along the radial direction of the drum patch 1, the struck area R1 is radially surrounded by these slits 10, 20. This makes it possible to effectively suppress deformation of the outer edge of the drum patch 1, such as lifting it off the striking surface 106a, over the entire circumference of the drum patch 1.

[0025] 2, a line segment connecting a pair of edges 11 extending in the longitudinal direction of the first slit 10 (radial direction of the drum patch 1) and an intersection P1 (a point where the curvature of the outer edge of the drum patch 1 changes) between the pair of edges 11 and the outer edge of the drum patch 1 is defined as an imaginary line V1. If the edge of the first slit 10 connecting the tips of the pair of edges 11 is defined as a leading edge 12, then the length of the line segment connecting the tip of the leading edge 12 (the portion farthest from the midpoint C1 of the imaginary line V1) and the midpoint C1 of the imaginary line V1 is the length of the first slit 10.

[0026] Similarly, if the line segment connecting the intersection points P2 between a pair of edges 21 extending in the longitudinal direction of the second slit 20 and the outer edge of the drum patch 1 is defined as a virtual line V2, the length of the line segment connecting the tip of the tip edge 22 of the second slit 20 connecting the pair of edges 21 to the midpoint C2 of the virtual line V2 is the length of the second slit 20.

[0027] Since the length of the second slit 20 is longer than that of the first slit 10, when the striking area R1 is struck, the wavy deformation of the drum patch 1 is easily absorbed by the second slit 20. This makes it possible to prevent the drum patch 1 from peeling off from the striking surface 106a.

[0028] To prevent the drum patch 1 from wavy deformation, it is preferable to form a large number of relatively long second slits 20, but forming a large number of second slits 20 reduces the area that receives a strike from the beater 112. That is, although the area in contact with a plurality of second slits 20 has been described as the struck area R1, as described above, it is also possible that the beater 112 will strike an area outside the struck area R1. For this reason, if the number of second slits 20 is increased, the impact when an area outside the struck area R1 is struck will be more likely to be applied to the striking surface 106a.

[0029] In contrast, in this embodiment, the number of second slits 20 (4) is fewer than the number of first slits 10 (20), so the second slits 20 suppress wavy deformation of the drum patch 1, while the area that receives the impact from the beater 112 can be secured widely outside the struck area R1. Therefore, the drum patch 1 can effectively protect the striking surface 106a, while suppressing peeling of the drum patch 1 from the striking surface 106a.

[0030] The distance between the pair of edges 11 of the first slit 10 gradually increases as they approach the leading edge 12, and the pair of edges 11 are connected to each other by a leading edge 12 that is shaped like an arc (minor arc). Similarly, the pair of edges 21 of the second slit 20 are connected to each other by a leading edge 22 that is shaped like an arc. By connecting the edges 11, 21 of the slits 10, 20 to each other in an arc shape in this manner, it is possible to prevent cracks from occurring at the leading edges 12, 22 of the slits 10, 20 due to the impact of striking the struck area R1. This improves the durability of the drum patch 1.

[0031] As described above, the length of the line segment connecting the tip of the tip edge 12 of the first slit 10 and the midpoint C1 of the imaginary line V1 is the length of the first slit 10. In other words, the direction along this line segment is the longitudinal direction of the first slit 10, and the direction perpendicular to this is the width direction of the first slit 10. The same is true for the second slit 20. In this case, each of the pair of edges 11 of the first slit 10 is curved toward the outside in the width direction of the first slit 10 (a curved portion is formed). Also, each of the pair of edges 21 of the second slit 20 is formed with curved portions 21a, 21b that curve toward the outside and inside in the width direction of the second slit 20. By curving the edges 11, 21 of each slit 10, 20 in this manner, the edges 11, 21 of each slit 10, 20 are less likely to lift off the striking surface 106a when striking the striking area R1, compared to when, for example, those edges 11, 21 are straight.

[0032] In addition, in the second slit 20, the curved portions 21a, 21b are alternately arranged from the base end side (intersection P2 side) to the tip end side, so that the edge 21 of the second slit 20 can be more effectively prevented from lifting up from the striking surface 106a when striking the struck area R1. By preventing the edge 21 from lifting up from the striking surface 106a, the drum patch 1 can be prevented from peeling off from the striking surface 106a.

[0033] Next, a drum patch 201 according to a second embodiment will be described with reference to Fig. 3. Fig. 3 is a front view of the drum patch 201 according to the second embodiment. Note that the same parts as those in the drum patch 1 according to the first embodiment described above are given the same reference numerals and their description will be omitted (this also applies to other embodiments described later).

[0034] As shown in FIG. 3, the outer edge of the drum patch 201 of the second embodiment is formed with a plurality of first slits 10 (12 in this embodiment) and second slits 220 having a deeper cutting depth than the first slits 10.

[0035] A plurality of second slits 220 (four in this embodiment) are formed in the circumferential direction of the drum patch 201, and the intervals between the plurality of second slits 220 in the circumferential direction are constant. That is, the second slits 220 are formed at positions that equally divide the plurality of first slits 10 (into four).

[0036] If a virtual circle tangent to the edge of each second slit 220 is defined as the struck area R2, in this embodiment as well, the first slit 10 and the second slit 220 extending toward the struck area R2 are formed on the outer edge of the drum patch 201. Therefore, when the struck area R2 is struck, the slits 10, 220 can absorb deformation that causes the outer edge portion of the drum patch 201 to rise up from the striking surface 106a (see FIG. 1).

[0037] In addition, since the struck area R2 is surrounded by a plurality of radially extending first slits 10 and second slits 220, deformation such as the outer edge portion of the drum patch 1 lifting off the striking surface 106a can be effectively suppressed over the entire circumference of the drum patch 1.

[0038] As shown in the enlarged portion of Figure 3, if the line segment connecting the intersection points P3 between a pair of edges 221 extending in the longitudinal direction of the second slit 220 and the outer edge of the drum patch 201 is defined as a virtual line V3, the length of the line segment connecting the tip of the tip edge 222 of the second slit 220 connecting the pair of edges 221 to the midpoint C3 of the virtual line V3 is the length of the second slit 220.

[0039] In this embodiment as well, the length of the second slit 220 is longer than the first slit 10, so that when the struck area R2 is struck, the wavy deformation of the drum patch 201 is easily absorbed by the second slit 220.

[0040] In addition, because the number of second slits 220 (4) is fewer than the number of first slits 10 (12), the wavy deformation of the drum patch 201 is suppressed by the second slits 220, while the area that receives the impact from the beater 112 can be secured widely outside the struck area R2. Therefore, the drum patch 201 can effectively protect the striking surface 106a while suppressing the drum patch 201 from peeling off from the striking surface 106a.

[0041] A pair of edges 221 of the second slit 220 are formed in straight lines with the distance between them gradually decreasing as they approach the tip edge 222, and the pair of edges 221 are connected to each other by the arc-shaped tip edge 222. This makes it possible to suppress the occurrence of cracks from the tip edge 222 of the second slit 220 due to the impact when striking the struck area R2, thereby improving the durability of the drum patch 201.

[0042] Further, a notch 223 is formed on the edge 221 of the second slit 220, extending outward in the width direction of the second slit 220. A plurality of notches 223 (three on each side in this embodiment) are formed in the longitudinal direction of each edge 221 of the second slit 220.

[0043] If a line segment connecting intersection points P4 between a pair of edges 223a each extending in the longitudinal direction of the cutout 223 (the radial direction of the drum patch 201) and the edge 221 of the second slit 220 is defined as an imaginary line V4, the length of the line segment connecting the tip of the tip edge 223b of the cutout 223 connecting the pair of edges 223a to the midpoint C4 of the imaginary line V4 is the length of the cutout 223. The length of the cutout 223 is formed in a slit shape shorter than the length of the second slit 220 (the length from the midpoint C3 to the tip edge 222).

[0044] By forming such a cut 223, the edge 221 of the second slit 220 is less likely to lift off the striking surface 106a when striking the striking area R2, compared to when the edge 221 of the second slit 220 is straight. This makes it possible to prevent the drum patch 201 from peeling off the striking surface 106a.

[0045] In addition, since the pair of edges 223a of the cut 223 are connected by the arc-shaped leading edge 223b, it is possible to prevent cracks from occurring at the leading edge 223b of the cut 223 due to the impact when the struck area R2 is struck. This improves the durability of the drum patch 201.

[0046] Next, drum patches 301 and 401 of the third and fourth embodiments will be described with reference to Fig. 4. Fig. 4(a) is a front view of the drum patch 301 of the third embodiment, and Fig. 4(b) is a front view of the drum patch 401 of the fourth embodiment.

[0047] As shown in Figure 4(a), the drum patch 301 of the third embodiment is obtained by omitting the second slits 20 from the drum patch 1 of the first embodiment (see Figure 2) and increasing the number of first slits 10 to 36.

[0048] If a virtual circle tangent to the edge of each first slit 10 is defined as a struck area R3, in this embodiment as well, the first slits 10 extending toward the struck area R3 are formed on the outer edge of the drum patch 301. Therefore, when the struck area R3 is struck, the first slits 10 can absorb deformation that causes the outer edge portion of the drum patch 301 to rise up from the striking surface 106a (see FIG. 1).

[0049] In this embodiment, only the first slit 10 is formed in the drum patch 301, but it is of course possible to omit the first slit 10 and form only the second slits 20, 220 (see FIGS. 2 and 3).

[0050] 4(b), the drum patch 401 of the fourth embodiment is obtained by adding circular through holes 430 to the drum patch 301 of the third embodiment. A plurality of through holes 430 are arranged at equal intervals in the circumferential direction of the drum patch 401, and these multiple through holes 430 are formed on the inner side than the first slits 10 (diametrically inward of the drum patch 401).

[0051] If a virtual circle tangent to the edge of each through hole 430 is defined as the struck area R4, the impact when the struck area R4 is struck is absorbed by each through hole 430, and the impact can be prevented from being transmitted to the outer periphery of each through hole 430.

[0052] The through holes 430 are formed at positions different from the first slits 10 in the circumferential direction of the struck area R4 (positions that do not overlap with the first slits 10 in the radial direction of the struck area R4). In other words, the first slits 10 and the through holes 430 are alternately arranged around the struck area R4, so that it is possible to prevent the impact when the struck area R4 is struck from being transmitted to the areas between the first slits 10. This makes it possible to effectively prevent deformation such as lifting the outer edge portion of the drum patch 401 from the striking surface 106a.

[0053] Next, drum patches 501 and 601 of fifth and sixth embodiments will be described with reference to Fig. 5. Fig. 5(a) is a front view of the drum patch 501 of the fifth embodiment, and Fig. 5(b) is a front view of the drum patch 601 of the sixth embodiment.

[0054] 5(a), a plurality of (six in this embodiment) slits 540 are formed at equal intervals in the circumferential direction on the outer edge of a drum patch 501 of the fifth embodiment. A pair of edges 541 extending in the longitudinal direction of the slits 540 are formed in straight lines with the distance between them gradually decreasing as they approach a tip edge 542 of the slits 540.

[0055] If a line segment connecting intersection points P5 between a pair of edges 541 of the slit 540 and the outer edge of the drum patch 501 is defined as an imaginary line V5, the length of the line segment connecting the tip of the tip edge 542 of the slit 540 and a midpoint C5 of the imaginary line V5 is the length of the slit 540. Since each of the multiple slits 540 has the same length, an imaginary circle tangent to all of the slits 540 is the struck area R5.

[0056] In this embodiment, too, a slit 540 extending toward the struck area R5 is formed on the outer edge of the drum patch 501, so that when the struck area R5 is struck, deformation such as the outer edge portion of the drum patch 501 lifting up from the striking surface 106a (see Figure 1) can be suppressed.

[0057] In addition, since the pair of edges 541 of the slit 540 are connected by the arc-shaped leading edge 542, it is possible to prevent cracks from occurring at the leading edge 542 of the slit 540 due to the impact when the struck area R5 is struck. This improves the durability of the drum patch 501.

[0058] 5(b), a plurality of (five in this embodiment) slits 640 are formed at equal intervals in the circumferential direction on the outer edge of the drum patch 601 of the sixth embodiment. The distance between a pair of edges 641 extending in the longitudinal direction of the slit 640 gradually decreases as they approach a tip edge 642.

[0059] If a line segment connecting intersection points P6 between a pair of edges 641 of the slit 640 and the outer edge of the drum patch 601 is defined as an imaginary line V6, the length of the line segment connecting the tip of the tip edge 642 of the slit 640 and a midpoint C6 of the imaginary line V6 is the length of the slit 640. Since each of the multiple slits 640 has the same length, an imaginary circle tangent to all of the slits 640 is the struck area R6.

[0060] In this embodiment, too, a slit 640 extending toward the struck area R6 is formed on the outer edge of the drum patch 601, so that when the struck area R6 is struck, deformation such as the outer edge portion of the drum patch 601 lifting up from the striking surface 106a can be suppressed.

[0061] In this embodiment, the slit 640 is inclined with respect to the radial direction of the drum patch 601 (striked region R6). This makes it possible to effectively (over a wide range in the circumferential direction) suppress the transmission of the impact of a strike on the struck region R6 to the outer edge side of the drum patch 601 with one slit 640.

[0062] Each of a pair of edges 641 of the slit 640 is curved (a curved portion is formed) toward the inside in the width direction of the slit 640. This makes it possible to prevent the edge 641 of the slit 640 from lifting up from the striking surface 106a when striking the striking area R6, compared to when the edge 641 of the slit 640 is straight.

[0063] In addition, since the pair of edges 641 of the slit 640 are connected by the arc-shaped leading edge 642, it is possible to prevent cracks from occurring at the leading edge 642 of the slit 640 due to the impact when striking the struck area R6. This improves the durability of the drum patch 601.

[0064] Next, a drum patch 701 according to a seventh embodiment will be described with reference to Fig. 6. Fig. 6 is a front view of the drum patch 701 according to the seventh embodiment.

[0065] 6, the outer shape of the drum patch 701 of the seventh embodiment is formed into an ellipse extending from left to right. A plurality of slits 740 (16 in this embodiment) are formed in the outer edge of the drum patch 701 and aligned in the circumferential direction. The distance between a pair of edges 741 extending in the longitudinal direction of the slit 740 gradually decreases as they approach a tip edge 742.

[0066] If the line segment connecting the intersection points P7 between a pair of edges 741 of slit 740 and the outer edge of drum patch 701 is defined as imaginary line V7, the length of the line segment connecting the tip of tip edge 742 of slit 740 and the midpoint C7 of imaginary line V7 is the length of slit 740.

[0067] Among the multiple slits 740, some of the slits 740 are set to a different length from the other slits 740, but among the imaginary circles that are in contact with the tip edges 742 of three or more slits 740 and do not intersect with the other slits 740, the one with the largest diameter is the struck area R7. The struck areas R7 are formed in a pair on the left and right sides of the center of the drum patch 701, with some of the struck areas overlapping each other. That is, in this embodiment, it is assumed that the beater 112 (see FIG. 1) protects the striking surface 106a from strikes by two twin-pedal-type foot pedals 110, and the struck area R7 is disposed at a position struck by the two beaters 112.

[0068] Since multiple slits 740 extending toward each of the pair of struck regions R7 are formed on the outer edge of the drum patch 701, deformation such as lifting of the outer edge of the drum patch 701 from the striking surface 106a can be suppressed when the struck region R7 is struck. Also, since the slits 740 are arranged along each of the expected pair of struck regions R7, the struck region R7 can be secured to be wide.

[0069] In addition, since the pair of edges 741 of the slit 740 are connected by the leading edge 742 having a circular arc (major arc) shape, it is possible to prevent cracks from occurring at the leading edge 742 of the slit 740 due to the impact of striking the struck area R7. This improves the durability of the drum patch 701.

[0070] Next, a drum patch 801 according to an eighth embodiment will be described with reference to Fig. 7. Fig. 7 is a front view of the drum patch 801 according to the eighth embodiment.

[0071] As shown in FIG. 7, the drum patch 801 of the eighth embodiment comprises a main body portion 801a constituting the central portion thereof, and extension portions 801b extending out to the left and right from the main body portion 801a, and these portions 801a, 801b are integrally formed.

[0072] The main body 801a is formed in an elliptical shape extending vertically, and the left and right protruding parts 801b are formed in semi-elliptical shapes extending horizontally from the main body 801a. In other words, the outer shape of the drum patch 801 is a shape made up of multiple overlapping ellipses.

[0073] A plurality of slits 740 (10 slits on the main body 801a and 7 slits on each of the protruding portions 801b, totaling 24 slits) are formed in the circumferential direction on the outer edges of the main body 801a and the protruding portions 801b in this embodiment. The slits 740 have the same shape as the slits 740 in the seventh embodiment described above (see FIG. 6).

[0074] Among the multiple slits 740, some of the slits 740 are set to a different length from the other slits 740, but among the imaginary circles that are in contact with the tip edges 742 of three or more slits 740 and do not intersect with the other slits 740, the imaginary circle with the largest diameter is the first struck area R8a. This first struck area R8a is formed in the main body part 801a. In addition, when imaginary circles are drawn that are in contact with the tip edges 742 of three or more slits 740 among the slits 740 that are not in contact with the first struck area R8a and do not intersect with the other slits 740, the imaginary circle with the largest diameter is the second struck area R8b. This second struck area R8b is formed in one place on each of the pair of overhanging parts 801b.

[0075] That is, in this embodiment, when the beater 112 (see FIG. 1) uses one single-pedal type foot pedal 110, it is assumed that the beater 112 receives an impact in a first striking area R8a of the main body portion 801a, whereas when the beater 112 uses two twin-pedal type foot pedals 110, it is assumed that the beater 112 receives an impact in a second striking area R8b of a pair of extension portions 801b.

[0076] Since multiple slits 740 extending toward each of the three struck areas R8a, R8b are formed on the outer edge of the drum patch 801 (main body 801a and overhang 801b), deformation such as lifting of the outer edge of the drum patch 801 from the striking surface 106a can be suppressed when the struck areas R8a, R8b are struck. Also, since the slits 740 are arranged so as to follow each of the three expected struck areas R8a, R8b, the struck areas R8a, R8b can be secured to be wide.

[0077] In addition, since the slit 740 is formed at the intersection P8 between the outer edge of the main body 801a and the outer edge of the protruding portion 801b, it is possible to prevent cracks from occurring at the intersection P8 due to the impact when striking the struck areas R8a and R8b, thereby improving the durability of the drum patch 801.

[0078] The above has been explained based on the above embodiment, however, the present invention is in no way limited to the above embodiment, and it can be easily inferred that various improvements and modifications are possible within the scope that does not deviate from the spirit of the present invention.

[0079] A part or all of the drum patches 1, 201, 301, 401, 501, 601, 701, and 801 (hereinafter collectively referred to as "drum patches 1 to 801") of the above-mentioned embodiments may be combined with a part or all of the other embodiments to form a drum patch. That is, for example, a part or all of the first slit 10, the second slit 20, and 220, the through hole 430, and the slits 540, 640, and 740 may be formed in one drum patch.

[0080] In the above embodiments, the drum patches 1-801 are attached to the striking surface 106a of the attachment 106 attached to the drum 100 (bass drum), but this is not necessarily limited to the above. For example, the drum patches 1-801 may be directly attached to the head 102 (striking surface) of the drum 100 that does not have the attachment 106, or the drum patches 1-801 may be attached to the striking surface of a snare or tom. In other words, the drum patches 1-801 may be attached to the striking surface of an electronic percussion instrument that imitates a drum, or the drum patches 1-801 may be attached to the striking surface of an acoustic drum.

[0081] In each of the above embodiments, the case has been described in which the entire striking surface 106a that is struck by the performer is covered with the drum patches 1-801. However, a configuration in which the drum patches 1-801 cover only a part of the striking surface 106a may also be used.

[0082] In the above embodiments, the drum patches 1-801 have a circular (elliptical) outer shape or a shape that combines ellipses, but this is not necessarily limited to this. For example, the drum patches 1-801 may have a polygonal outer shape (e.g., diamond or rectangle), or may have a shape that combines circles and polygons. In other words, the outer shape of the drum patches 1-801 can be set appropriately as long as it can protect the striking surface 106a.

[0083] Although not explained in the above embodiments, the drum patches 1-801 are composed of a first adhesive layer adhered to the striking surface 106a, a resin film overlaid on the first adhesive layer, a second adhesive layer overlaid on the resin film, and a cloth overlaid on the second adhesive layer. The first adhesive layer is a double-sided tape in which an adhesive is held on a substrate (film or cloth), and the second adhesive layer is a double-sided tape without such a substrate.

[0084] However, the drum patches 1-801 are not limited to being made of laminated materials such as those mentioned above. For example, the first adhesive layer may be formed using double-sided tape that does not have a base material, or the second adhesive layer may be formed using double-sided tape that has the same base material as the first adhesive layer. Also, the drum patches 1-801 may be made of a single layer of woven fabric, nonwoven fabric, or resin film and attached to the striking surface 106a with double-sided tape. In other words, the material of the drum patches 1-801 may be appropriately selected as long as it can protect the striking surface 106a.

[0085] In the above embodiments, the longitudinal direction of the first slit 10, the second slits 20, 220, and the slit 540 is aligned with the radial direction of the drum patch, but this is not necessarily limited to this. For example, the slits 10, 20, 220, and 540 may be inclined with respect to the radial direction of the drum patch (striked area) like the slit 640 in the sixth embodiment.

[0086] In the above embodiments, a plurality of first slits 10, second slits 20, 220, through holes 430, and slits 540, 640, 740 are formed in the drum patches 1 to 801. However, the number of the slits or through holes may be one.

[0087] In each of the above embodiments, for example, the length and interval between the first slits 10 are constant, but the length and interval between the first slits 10 may be different. The same applies to the second slits 20, 220 and the slits 540, 640.

[0088] In the above first embodiment, a case was described in which curved portions 21a, 21b are formed on the edge 21 of the second slit 20, and in the second embodiment, a case was described in which a notch 223 is formed in the second slit 220. However, such curved portions or notches may be formed in the first slit 10 or the slits 540, 640, 740, or the curved portions 21a, 21b or the notch 223 may be omitted (for example, the edges 11, 21 of each slit 10, 20 may be formed in a straight line).

[0089] In each of the above embodiments, the leading edges 12, 22, 223b, 542, 642, 742 of the first slit 10, the second slit 20, 220, the notch 223, and the slits 540, 640, 740 are arc-shaped. However, the leading edges 12, 22, 223b, 542, 642, 742 may have an acute angle.

[0090] In the above first and second embodiments, the number of second slits 20, 220 is smaller than the number of first slits 10, but the number of first slits 10 and the number of second slits 20, 220 may be the same, or the number of second slits 20, 220 may be greater than the number of first slits 10.

[0091] In the fourth embodiment, the through hole 430 is circular, but the shape is not limited to this. For example, the through hole 430 may be polygonal or elongated. In other words, the shape of the through hole 430 can be appropriately set as long as it is a hole that penetrates the drum patch. [Explanation of symbols]

[0092] 1,201,301,401,501,601,701,801 Drum Patches 10 First slit (slit) 11 Slit Edge 12 Tip edge of slit 20,220 Second slit (slit) 21,221 Slit Edge 21a, 21b Curved portion 22,222 Tip edge of slit 223 Cut 223a Edge of cut 223b Tip edge of incision 430 Through hole 540,640,740 Slit 541,741 Slit Edge 641 Slit edge (curved part) 542,642,742 Tip edge of slit 100 Dram R1, R2, R3, R4, R5, R6, R7, R8a, R8b are the impacted areas

Claims

1. A drum patch formed in a sheet shape that can be adhered to the striking surface of a drum, A drum patch having an outer edge formed with a slit extending toward a struck area that receives a strike.

2. 2. The drum patch of claim 1, wherein the struck area is surrounded by a plurality of the slits.

3. 3. The drum patch according to claim 2, wherein the slits are at least comprised of a first slit and a second slit that is longer than the first slit.

4. 4. The drum patch according to claim 3, wherein the number of the second slits is smaller than the number of the first slits.

5. 2. The drum patch according to claim 1, wherein an edge extending in a longitudinal direction of the slit is formed with a curved portion that is curved inwardly or outwardly in a width direction of the slit.

6. The drum patch according to claim 5, characterized in that the curved portions having a curved shape that convexly extends inward in the width direction of the slit and the curved portions having a curved shape that convexly extends outward in the width direction of the slit are arranged alternately in the longitudinal direction of the slit.

7. 3. The drum patch of claim 2, wherein the slits radially surround the struck area.

8. A plurality of through holes are provided surrounding the striking area, 3. The drum patch according to claim 2, wherein the slit and the through hole are formed at different positions in a direction around the outer periphery of the striking area.

9. 3. The drum patch of claim 2, wherein each of a plurality of said struck areas is surrounded by a plurality of said slits.

10. 2. The drum patch according to claim 1, wherein a tip edge of the slit connecting edges extending in the longitudinal direction of the slit to each other is arcuate.

11. 2. The drum patch according to claim 1, wherein a slit-shaped cut is formed on an edge extending in a longitudinal direction of the slit and extending outward in a width direction of the slit.

12. 12. The drum patch according to claim 11, wherein a tip edge of the cutout connecting edges extending in the longitudinal direction of the cutout is arcuate.

13. A method for protecting a striking surface of a drum using a drum patch formed in a sheet shape, comprising: A method for protecting a striking surface, comprising adhering to the striking surface a drum patch having an outer edge formed with a slit extending toward a struck area that receives the strike.

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