Sound generator and blank sheet for forming sound generator

Abstract

To provide a sound generator which can be created by a paper material capable of generating large clap sound.SOLUTION: A sound generator includes: a reception side cylinder part which includes a first inner face plate having one striking face and a first outer peripheral wall and is surrounded by the first inner face plate and the first outer peripheral wall; a cylindrical grasping part which includes a second inner face plate overlapped with a base end side of one striking face and a second outer peripheral wall and is surrounded by the second inner face plate and the second outer peripheral wall; and a striking side cylinder part which is connected to the second inner face plate through a bending line, includes a third inner face plate having the other striking face for striking the one striking face and a third outer peripheral wall, is surrounded by the third inner face plate and the third outer peripheral wall, and is formed on an extension of the grasping part. A gap is formed between opposing wall faces between a tip side opening end of the second outer peripheral wall and a base end side opening end of the third outer peripheral wall, the striking side cylinder part is rotated at an angle within a prescribed range with respect to the reception side cylinder part with the bending line as a central axis, and the third inner face plate is struck against the first inner face plate to generate sound.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a sound generating device and a blank sheet for forming the sound generating device. [Background technology]

[0002] BACKGROUND ART Non-electric megaphones capable of generating clapping sounds have been widely developed as cheering goods in stadiums, sports venues, and other cheering venues (for example, Patent Documents 1 and 2). The conventional megaphone shown in Patent Document 1 and elsewhere is formed by splitting a truncated cone-shaped cylinder with a tapered peripheral wall in half, and then forming two halves with clap plates that close the gap between both ends of each halved peripheral wall, with the clap plates facing each other and their base ends held by a cylindrical member. This type of megaphone is designed so that the part of one of the halves beyond the gripping part can be rotated circumferentially by a predetermined amount around the tip of the cylindrical member, and the clap plate of one halved body can be struck against the clap plate of the other halved body to generate a clap sound. Furthermore, conventional megaphones such as those disclosed in Patent Document 1 are designed to allow the user to amplify their voice by placing their mouth over the opening at the base end of the cylinder. In addition, the megaphone described in Patent Document 2 has a paper base material formed into a roughly fan-shaped form along the hypotenuse, into a truncated polygonal pyramid shape, and by shaking the megaphone, a rattle piece attached to the side end on the inside of the polygonal pyramid strikes the inner surface of the polygonal pyramid, producing a sound. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 5-45796 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-237835 Summary of the Invention [Problem to be solved by the invention]

[0004] The resin megaphone of Patent Document 1 requires multiple parts and is not easy for anyone to make. Furthermore, because the conventional megaphone uses resin, it does not meet the recent demand for environmental protection by reducing the use of fossil fuels. Furthermore, the paper megaphone in Patent Document 2 has a bent clapper piece attached to the inside of a truncated polygonal pyramid, which is shaken to make a sound, but the clapper piece is too small and light to shake and hit the inside of the polygonal pyramid, and the clapper piece has a tendency to fold, making it difficult to make a sound, and the small size of the clapper piece makes the resulting sound small. Therefore, the present invention provides a sound generating tool that is easy to make a sound and can generate an appropriate clap sound. [Means for solving the problem]

[0005] (1) The sound generating device of the present invention comprises a first inner surface plate having one striking surface, a first outer peripheral wall provided contiguous to a side edge of the first inner surface plate, a receiving cylindrical portion surrounded by the first inner surface plate and the first outer peripheral wall and having a through hole extending in one direction, a second inner surface plate superimposed on the base end side of the one striking surface, a second outer peripheral wall provided contiguous to the side edge of the second inner surface plate, a cylindrical grip portion surrounded by the second inner surface plate and the second outer peripheral wall and having a through hole extending in one direction, and a second striking surface connected to the second inner surface plate via a bending line and configured to strike the one striking surface. The device has a third inner plate having a sounding surface, and a third outer wall connected to the side edge of the third inner plate, and is equipped with a striking side tube portion that is surrounded by the third inner plate and the third outer wall and has a through hole formed therein extending in one direction on the extension of the grip portion, and between the tip side opening end of the second outer wall and the base side opening end of the third outer wall, a gap is formed between the opposing wall surfaces or in a direction separating them when viewed in the one direction, and sound can be generated by rotating the striking side tube portion within a predetermined range of angles relative to the receiving side tube portion with the bending line as the central axis and striking the third inner plate against the first inner plate. According to this configuration, the hitting-side cylinder portion can be rotated to bring the third inner surface plate into strong contact with the first inner surface plate. (2) The opening area of ​​the base end side of the third outer peripheral wall of the sound generating device of the present invention may be larger than the opening area of ​​the tip end side of the second outer peripheral wall, and at least a portion of the tip end side opening edge of the second outer peripheral wall may be formed so as to be positionable inside the base end part of the third outer peripheral wall. According to this configuration, when the hitting-side tubular portion opens, the base end edge of the third outer peripheral wall can abut against the second outer peripheral wall, preventing the hitting-side tubular portion from opening too much. (3) The first inner surface plate and the second inner surface plate of the sound generating device of the present invention may be connected via a bending line. This configuration makes it easy to assemble the sound generating device of the present invention. (4) Each of the first outer wall and the third outer wall of the sound generating device of the present invention may be provided with a rising axis and a slit forming a tongue extending from one end of the rising axis toward the base end, and an opening window may be formed surrounded by the rising axis and the slit. According to this configuration, the cover member can be fixed. (5) At least one of the receiving-side tubular portion and the hitting-side tubular portion of the sound generating device of the present invention may be formed into a pyramid that gradually widens from the base edge toward the tip edge. With this configuration, the sound generating device can be used as a megaphone. (6) The receiving-side tubular portion, the gripping portion, and the hitting-side tubular portion of the sound generating device of the present invention may each be formed in a trapezoidal shape in a cross section perpendicular to the longitudinal direction. This configuration makes it easy to grip the sound generating device of the present invention. (7) The blank sheet of the present invention can be used to make any of the sound-generating devices described above. [Effects of the Invention]

[0006] The sound generating device of the present invention has the effect of being able to easily produce a sound and generate a clap sound of an appropriate volume. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a view of a blank sheet according to an embodiment of the present invention, viewed from its inner surface. [Figure 2] 2 is a partially enlarged view showing a second sheet portion of the blank sheet of FIG. 1 at the center. [Figure 3] 10A to 10C are diagrams illustrating a process for assembling a sound generating device using a blank sheet according to an embodiment of the present invention. [Figure 4] This figure shows the process of assembling a sound generating device using a blank sheet according to one embodiment of the present invention, with the receiving side tube portion, gripping portion, and striking side tube portion formed with the upper wall facing forward. [Figure 5] 10A to 10C are diagrams illustrating a process for assembling a sound generating device using a blank sheet according to an embodiment of the present invention. [Figure 6] 1 is a front view of a sound generating device according to an embodiment of the present invention, with a tip opening facing upward. [Figure 7] 1A and 1B are views of the sound generating device of the present invention as viewed from the proximal opening and distal opening, respectively; [Figure 8] 1 is a front view showing a state in which the hitting-side tube portion of a sound generating device according to an embodiment of the present invention is open. FIG. [Figure 9] 1 is a plan view showing a blank sheet of a lid member used in a sound generating device according to an embodiment of the present invention. FIG. [Figure 10] 1 is a perspective view showing a state in which a cover member is placed and fastened to a sound generating device according to an embodiment of the present invention. FIG. [Figure 11] 1 is a perspective view showing a state in which a string-like pressing member is placed over a sound generating device according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] A blank sheet for a sound generating device according to one embodiment of the present invention and a sound generating device formed from this blank sheet will be described below with reference to the drawings. Note that the dimensions of each part in the drawings used in the following description are not necessarily the same as the actual dimensions and can be changed as appropriate.

[0009] As shown in Figure 1, the blank sheet (hereinafter simply referred to as "blank sheet") 1a of the sound generating device of the present invention comprises a first sheet portion 10, a second sheet portion 20 connected to the first sheet portion 10 via a folding line, and a third sheet portion 30 connected to the second sheet portion 20 via a folding line.

[0010] The first sheet portion 10 is a sheet that forms the receiving-side tubular portion 2 of the sound generating device 1 shown in FIG. As shown in Figure 1, the first seat portion 10 has a first inner surface plate 11 having a striking surface that makes a sound when the surfaces strike each other, and a first outer peripheral wall 12 that is connected to the side edge of the first inner surface plate 11.

[0011] The first inner surface plate 11 is a thin, flat plate formed long such that the direction from the base edge 11a to the tip edge 11b is the longitudinal direction. The first inner surface plate 11 is formed in a substantially trapezoidal shape such that the width dimension gradually increases from the base edge 11a to the tip edge 11b. The dimensions of the first inner surface plate 11 are not particularly limited, but as an example, the longitudinal dimension can be approximately 200 mm to 400 mm.

[0012] The first outer peripheral wall 12 comprises one inclined wall 13, an upper wall 14 and the other inclined wall 15 connected to one side edge s1 of the first inner surface plate 11, and an inner inclined wall 16 connected to the other side edge s4 of the first inner surface plate 11 and overlapped inside the other inclined wall 15.

[0013] The one inclined wall 13 , the upper wall 14 , the other inclined wall 15 , and the inner inclined wall 16 are each a thin flat plate, and are formed so that the longitudinal dimension is approximately the same as that of the first inner surface plate 11 . The one inclined wall 13, the upper wall 14, the other inclined wall 15, and the inner inclined wall 16 are each formed in a trapezoidal shape narrower than the first inner surface plate 11, with the width gradually increasing toward the longitudinal end. The total width of the one inclined wall 13, the upper wall 14, and the other inclined wall 15 is formed to be larger than the width of the first inner surface plate 11. The upper wall 14 and the other inclined wall 15 are formed in substantially the same shape as the one inclined wall 13 .

[0014] The inner inclined wall 16 is formed narrower than the other inclined wall 15 so as to fit within the inner wall surface of the other inclined wall 15. The base end edge 16a of the inner inclined wall 16 is inclined in a direction away from the second outer peripheral wall 22 so as to be less likely to interfere with the second outer peripheral wall 22. Side edges s2 and s3 are provided between one inclined wall 13, the upper wall 14, and the other inclined wall 15, respectively, and each of these serves as a folding line.

[0015] The side edge s4 between the first inner surface plate 11 and the inner inclined wall 16 is a folding line. One or more insertion slits 17 (three in this embodiment) are formed on the side edge s4 at appropriate intervals. The insertion slit 17 closest to the leading edge is connected to the leading edge. Insertion pieces 18 corresponding to the insertion slits 17 are formed on the side edge 15s of the other inclined wall 15. A bending line is also formed between the insertion pieces 18 and the other inclined wall 15.

[0016] The second sheet portion 20 is a sheet that forms the grip portion 3 that is to be superimposed on the base end side of the receiving side tube portion 2 shown in FIG. As shown in Figure 1, the second seat portion 20 has a second inner surface plate 21 that is overlapped on the base end side of the first inner surface plate 11 with its base end edge 21a common to the base end edge 11a of the first inner surface plate 11, and a second outer peripheral wall 22 that is connected to the second inner surface plate 21 via side edges s5 and s8 of the second inner surface plate 21.

[0017] The second inner surface plate 21 is a thin, flat plate formed in a rectangular shape with approximately the same width from the base edge 21a to the tip edge 21b. The dimensions of the second inner surface plate 21 are not particularly limited, but can generally be set to a size that allows an adult to easily hold it with two or three fingers.

[0018] The second inner surface plate 21 is connected to the first inner surface plate 11 via one to several (two in this embodiment) bending lines L1 between them. The two bending lines L1 are arranged parallel to each other with a gap of 1 mm to several millimeters between them, making it easy to bend the first inner surface plate 11 and the second inner surface plate 21 together.

[0019] The second outer peripheral wall 22 comprises one inclined wall 23, an upper wall 24 and an inner inclined wall 25 connected to one side edge s5 of the second inner surface plate 21, and the other inclined wall 26 connected to the other side edge s8 of the second inner surface plate 21 and stacked on the outside of the inner inclined wall 25, each formed from a thin flat plate.

[0020] The longitudinal dimensions of the one inclined wall 23 , the upper wall 24 , the inner inclined wall 25 and the other inclined wall 26 are formed to be approximately the same as the longitudinal dimension of the second inner surface plate 21 . 2, the base edges 23a-25a and the tip edges 23b-25b of one inclined wall 23, the upper wall 24, and the inner inclined wall 25 are formed on a substantially straight line. The base edge 26a and the tip edge 26b of the other inclined wall 26 are formed on a straight line that is slightly inclined toward the center in the longitudinal direction.

[0021] The width of the upper wall 24 is formed to be approximately the same as the length of the base end edge 14 a of the upper wall 14 of the first outer peripheral wall 12 . The other inclined wall 26 has a width dimension (dimension in a direction perpendicular to the side edge s8) equal to the dimension of the base edge 13a of one of the inclined walls 13 of the first outer wall 12, and the base edge 26a and the tip edge 26b are formed into an approximately trapezoidal shape with an inclination as described above.

[0022] The width of the inner inclined wall 25 is smaller than the width of the other inclined wall 26 . The side edges s5 to s7 provided between the second inner surface plate 21, one of the inclined walls 23, the upper wall 24 and the inner inclined wall 25 respectively form bending lines. At least one insertion slit 27, one in this embodiment, is formed on the side s7 between the upper wall 24 and the inner inclined wall 25.

[0023] An insertion piece 28 corresponding to the insertion slit 27 is formed on a side edge 26s of the other inclined wall 26. A bending line is also formed between the insertion piece 28 and the other inclined wall 26. With the above configuration, when the second sheet portion 20 is folded at each side edge s5 to s8 into a cylindrical shape that penetrates in the longitudinal direction, the second inner surface plate 21 is wider than the upper wall 24, and the cross-sectional shape is formed so as to be approximately the same as the trapezoid of the base end opening of the receiving side tube portion 2.

[0024] The third sheet portion 30 is a sheet that forms the hitting-side tube portion 4 provided on the tip side of the grip portion 3 shown in FIG. As shown in FIG. 1, the third sheet portion 30 is connected to the second inner surface plate 21 via a bending line L2 between the third sheet portion 30 and the second inner surface plate 21. The third seat portion 30 has a third inner surface plate 31 that is overlapped on the tip side of the first inner surface plate 11, and a third outer wall 32 that is connected to the third inner surface plate 31 via the side edges s9, s12 of the third inner surface plate 31.

[0025] The third inner surface plate 31 is a thin, flat plate formed in a trapezoidal shape that is approximately symmetrical to the tip side portion of the first inner surface plate 11 (the tip side portion of the imaginary line L3 in Figure 1) of the area where the second inner surface plate 21 is overlapped.

[0026] The third inner surface plate 31 is connected to the second inner surface plate 21 via two bending lines L2 between them. The two bending lines L2 are arranged parallel to each other with a gap of 1 mm to several millimeters between them, making it easy to bend between the second inner surface plate 21 and the third inner surface plate 31. The bending line L2 may be formed by a single bending line having a thickness of 1 mm to several millimeters.

[0027] 2, small L-shaped or arc-shaped notches K are provided from both tip corners of the second inner surface plate 21, extending slightly toward the third inner surface plate 31 and curving toward the widthwise center of the third inner surface plate 31. A second bending line L2 is formed between the tips of the notches K, K.

[0028] The third outer peripheral wall 32 comprises one inclined wall 33, an upper wall 34 and the other inclined wall 35 connected to one side edge s9 of the third inner surface plate 31, and an inner inclined wall 36 connected to the other side edge s12 of the third inner surface plate 31 and stacked inside the other inclined wall 35, each of which is formed from a thin plate.

[0029] The base edge 33a of one inclined wall 33 extends obliquely from the tip of the L-shaped notch toward the second outer wall 22, the base edge 34a of the upper wall 34 extends so as to be slightly curved in the direction of the base edge 33a, and the base edge 35a of the other inclined wall 35 extends in a straight line almost in line with the base edge 33a.

[0030] As a result, as shown in Figure 6, when assembling the striking side tube portion 4, the base end edge 34a of the upper wall 34 extends above the tip of the upper wall 24 of the gripping portion 3, and the upper wall 34 is configured to cover the tip of the upper wall 24 of the gripping portion 3 with a gap between them.

[0031] As shown in FIG. 2, the base end edge 36a of the inner inclined wall 36 extends from the tip of the L-shaped notch at an angle in a direction away from each of the tip edges 24b of the second outer peripheral wall 22, etc.

[0032] 1, the shape of one inclined wall 33 is formed so that when the folding line L1 is folded and the second sheet portion 20 and the third sheet portion 30 are folded over the first sheet portion 10, the base end edge 33a of one inclined wall 33 shown in FIG. 1 coincides with the portion of one inclined wall 13 that is distal to the opposing imaginary line 13x. In other words, the shape of one inclined wall 33 of the third outer peripheral wall 32 is formed so as to be symmetrical with the shape of the portion of one inclined wall 33 that is distal to the imaginary line 13x that is symmetrical with the base end edge 33a, with the center line being approximately between the folding lines L1, L1.

[0033] The shapes of the upper wall 34, the other inclined wall 35, and the inner inclined wall 36 of the third outer wall 32 are also formed almost linearly symmetrically with the shapes of each part of the upper wall 14, the other inclined wall 15, and the inner inclined wall 16 of the first outer wall 12 that are tip-side to the imaginary lines 14x to 16x that are symmetrical with each base edge 34a to 36a, with the bending lines L1, L1 as the center line, except for the positions where the insertion slit 37 and insertion piece 38 are formed.

[0034] Although not particularly limited, two insertion slits 37 are formed between the third inner surface plate 31 and the inner inclined wall 36 with a gap therebetween. The insertion piece 38 formed on the side edge of the other inclined wall 35 is formed at a position corresponding to the insertion slit 37 when the third sheet portion 30 is folded into a rectangular cylindrical shape.

[0035] The blank sheet 1a having the above-described configuration is made by punching out a single rigid sheet of paper so that the first sheet portion 10, the second sheet portion 20 and the third sheet portion 30 are integrally connected, and folding lines are formed by embossing or the like.

[0036] 3, the blank sheet 1a is formed into a rectangular tube shape by folding the first sheet portion 10, the second sheet portion 20, and the third sheet portion 30 along folding lines s1 to s12. Each inner inclined wall 16, 25, 36, etc. is disposed inside the other inclined wall 15, 26, 35, and the corresponding insertion pieces 18, 28, 38 are inserted into the insertion slits 17, 27, 37. As a result, as shown in FIG. 4, the first seat portion 10 becomes the receiving-side tube portion 2, the second seat portion 20 becomes the grip portion 3, and the third seat portion 30 becomes the hitting-side tube portion 4.

[0037] As shown in Figure 5, double-sided tape (not shown) is attached or adhesive is applied to the outer surface of the second inner surface plate 21, and it is bent in the direction of the arrow along bending lines L1, L1, and the second inner surface plate 21 and the third inner surface plate 31 are superimposed on the surface of the first inner surface plate 11. As a result of the above, as shown in Figs. 6 and 7, the sound generating tool 1 is formed, which is a pair of the receiving-side tubular portion 2 and the gripping portion 3 and hitting-side tubular portion 4 facing the receiving-side tubular portion 2.

[0038] Specifically, as shown schematically in Figure 7(a), the base end opening of the sound generating device 1 is formed into an overall hexagon by a trapezoid of approximately symmetrical shape divided by a first inner surface plate 11 and a second inner surface plate 21. The grip portion 3 is trapezoidal in shape, smaller than the receiving tube portion 2 except for the base end edge, and has a length that can be covered by a person's palm. As shown in Figures 6 and 7(b), the striking side tube portion 4 is a trapezoid that gradually widens almost symmetrically to the opposing portion of the receiving side tube portion 2, and when the first inner surface plate 11 and the third inner surface plate 31 are joined together, the overall shape is a gradually widening hexagonal truncated pyramid.

[0039] 1 and 6, the grip portion 3 and the hitting-side tube portion 4 are connected via a bending line L2 between the second inner surface plate 21 and the third inner surface plate 31, and as shown in Fig. 6 and Fig. 7(a), the base end of the third outer peripheral wall 32 covers the tip end of the second outer peripheral wall 22 with a gap therebetween. In other words, a gap is formed between the inner surface of the third outer peripheral wall 32 and the outer surface of the second outer peripheral wall 22.

[0040] With this configuration, as shown in Figure 8, the hitting side tube portion 4 rotates (i.e., opens) in a direction away from the receiving side tube portion 2 with the bending line L2 as the central axis, and opens until the base end edge 34a of the upper wall 34 of the hitting side tube portion 4, which covers the upper wall 24 of the holding portion 3 with a gap, contacts the upper wall 24 of the holding portion 3.

[0041] Therefore, the sound generating device 1 having the above configuration has the effect that the striking side tube portion 4 opens and closes reliably simply by grasping the base end side including the grip portion 3 and shaking it, and by bringing the third inner surface plate 31 into contact with the first inner surface plate 11, a clear and loud striking sound can be produced.

[0042] 6 and 7(a) and (b), the base end of the third outer peripheral wall 32 covers the tip end of the second outer peripheral wall 22 with a gap between the surfaces, which allows for smooth movement of the striking-side tube part 4. Furthermore, with this configuration, when the striking-side tube part 4 rotates open, the base end edge 34a of the upper wall 34 of the striking-side tube part 4 comes into contact with the upper wall 24 of the handle part 3, preventing it from opening any further. This prevents the striking-side tube part 4 from opening too much, making it easier to handle, and also allows the striking-side tube part 4 to be swung quickly, which has the effect of producing many striking sounds at short intervals.

[0043] In addition, the receiving side tube portion 2, the gripping portion 3 and the hitting side tube portion 4 are formed as a square tube that widens and penetrates towards the tip, which has the effect of allowing it to be used as a megaphone. Furthermore, the true sound generator 1 can be produced using a single blank sheet 1a formed by punching out a paperboard having a predetermined rigidity, which has the effect of making it extremely easy for the user to assemble.

[0044] As described above, the sound generating device 1 of the present invention can be made using a rigid cardboard material, which avoids the use of fossil fuels and is effective for environmental conservation. Furthermore, after use, it can be easily made into a blank sheet 1a, which can be reused as paper resources.

[0045] In addition, the sound generating device of the present invention may be provided with a lid portion that removably covers at least one of the base end opening and tip end opening of the receiving side tube portion, the base end opening of the holding portion, and the tip end opening of the striking side tube portion. Specifically, the sound generating device 1 of the present invention may have a cover member 5 that closes the distal end opening and / or the proximal end opening in an openable manner, as shown in FIGS. As shown in Figure 9, the cover member 5 preferably has a top surface 51 that covers the entire opening formed by the receiving side tube portion 2 and the striking side tube portion 4, a side plate 52 that is appropriately aligned with the first outer wall 12 and the third outer wall 32, and a locking portion 53 such as an insertion portion.

[0046] An example of the locked portion 54 that locks the locking portion 53 is an opening window provided in the outer peripheral wall of the sound generating device 1. 1 or 11, the opening window 54 can be formed by a bendable rising line 54a and arc-, U-, or polygonal perforated cuts 54b formed so that their free ends extend toward the base end edges of the first outer peripheral wall 12 and the third outer peripheral wall 32. The cuts 54b can be formed into an arc-, U-, or polygonal shape by providing a joint.

[0047] The position where the opening window 54 is formed is not particularly limited as long as the cover member 5 can be properly fastened, but for example, it may be provided at positions facing each other on the first outer peripheral wall 12 and the third outer peripheral wall 32. Furthermore, one or more engaging portions 54 may be provided at intervals in the longitudinal direction of the first outer peripheral wall 12 and the third outer peripheral wall 32.

[0048] By providing the above-described cover member 5 and the engaging portion 54 such as an opening window, it is possible to create a space inside which can be used to place and hold sweets or other items before using the sound generating device 1 to make a sound or as a megaphone.

[0049] Moreover, the opening window 54 may be used by locking a rubber band or other string member 56 to the cover member 5 as shown in FIG. The cover member 5 and the locked portion 54 may be provided at the base end side opening of the sound generating device 1 in the same manner as shown in FIG. Alternatively, an insertion hole may be formed at the base end of the sound generating device 1, and a string member may be passed through to attach a strap.

[0050] In the above embodiment, a preferred configuration in which the first inner surface plate 11 of the receiving-side tubular portion 2 and the second inner surface plate 21 of the gripping portion 3 are bonded together is exemplified, but it is not essential that the first inner surface plate 11 and the second inner surface plate 21 are bonded together. Also, although a configuration in which the first sheet portion 10, the second sheet portion 20, and the third sheet portion 30 are formed from a single blank sheet 1a punched out is exemplified, the first sheet portion 10, the second sheet portion 20, and the third sheet portion 30 may be separate, and after assembling them into a cylindrical shape, the first inner surface plate 11 and the second inner surface plate 21 may be bonded and fixed together.

[0051] In addition, in the above embodiment, a sound generating device 1 having an overall hexagonal cross section was exemplified, with the receiving side tube portion 2, the holding portion 3, and the striking side tube portion 4 overlapping each other. However, the sound generating device 1 of the present invention can also be configured so that the receiving side tube portion 2, the holding portion 3, and the striking side tube portion 4 overlap each other to form polygonal cross sections with a triangular or greater shape.

[0052] Furthermore, in the above embodiment, a configuration in which the sound generating device 1 gradually expands from the base end to the tip end is exemplified, but the receiving side tube portion 2, the holding portion 3 and the striking side tube portion 4 may be formed with a constant opening cross section from the base end to the tip end, and the sound generating device 1 may be primarily intended to generate striking sounds. Furthermore, the blank sheet 1a and the sound generating device 1 of the present invention are preferably made of a paper material, but they can also be made of a biodegradable material other than paper.

[0053] In addition, the sound generating device 1 may have a longitudinal gap between the tip edge of the outer wall 22 of the gripping portion 3 and the base edge of the outer wall 32 of the striking side tube portion 4, so that the striking side tube portion 4 can be rotated around the bending line between the second inner surface plate 21 and the third inner surface plate 31 as the central axis. [Explanation of symbols]

[0054] 1. Sound generator 1a Blank sheet 2 Receiving side cylinder 3 Gripping part 4. Side barrel 5 Lid 10 First seat section 11 First inner plate 12 First outer peripheral wall 13 One of the sloping walls 14 Upper wall 15 The other inclined wall 16 Inner sloped wall 17, 27, 37 Insertion slits 18, 28, 38 Inserts 20 Second seat section 21 Second inner plate 22 Second outer peripheral wall 23 One of the sloping walls 24 Upper Wall 25 Inner sloped wall 26 The other inclined wall 30 Third seat section 31 Third inner plate 32 Third outer wall 33 One of the sloping walls 34 Upper Wall 35 The other inclined wall 36 Inner sloped wall 50 Lid member 51 Top plate 53 Insertion part (locking part) 54 Opening window (retained portion) 56 String-like member

Claims

1. a receiving side tubular portion having a first inner surface plate having one striking surface and a first outer peripheral wall provided continuous with a side edge of the first inner surface plate, the receiving side tubular portion being surrounded by the first inner surface plate and the first outer peripheral wall and having a through hole extending in one direction; a cylindrical grip portion having a second inner surface plate that is superimposed on the base end side of one of the striking surfaces, and a second outer peripheral wall that is continuous with a side edge of the second inner surface plate, the grip portion being surrounded by the second inner surface plate and the second outer peripheral wall and having a through hole that extends in one direction; a third inner surface plate connected to the second inner surface plate via a bending line and having another striking surface that strikes the one striking surface; a third outer peripheral wall connected to a side edge of the third inner surface plate; and a striking side tubular portion surrounded by the third inner surface plate and the third outer peripheral wall and having a through hole formed therein that extends in one direction along the extension of the grip portion; A gap is formed between the tip-side opening end of the second outer wall and the base-side opening end of the third outer wall, either between the opposing wall surfaces or in the direction separating them when viewed in one direction, and a sound generating device can generate sound by rotating the striking-side tube portion relative to the receiving-side tube portion within a predetermined range of angles with the bending line as the central axis and striking the third inner surface plate against the first inner surface plate.

2. an opening area on a base end side of the third outer peripheral wall is larger than an opening area on a tip end side of the second outer peripheral wall; 2. The sound generating device according to claim 1, wherein at least a portion of the distal end opening edge of the second outer peripheral wall is formed so as to be able to be positioned inside the proximal end of the third outer peripheral wall.

3. 2. The sound generating device according to claim 1, wherein the first inner surface plate and the second inner surface plate are connected via a bending line.

4. The sound generating device according to claim 1, wherein each of the first outer wall and the third outer wall is provided with a rising shaft and a slit forming a tongue extending from one end of the rising shaft toward the base end, and an opening window is formed surrounded by the rising shaft and the slit.

5. The sound generating device according to claim 1 , wherein at least one of the receiving-side tubular portion and the striking-side tubular portion is formed into a pyramidal shape that gradually widens from its base edge toward its tip edge.

6. The sound generating tool according to claim 5 , wherein the receiving-side tubular portion, the gripping portion, and the hitting-side tubular portion are each formed in a trapezoidal shape in a cross section perpendicular to the longitudinal direction.

7. A blank sheet from which the sound generating device according to claim 5 can be formed.

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