megaphone

Abstract

To provide a megaphone that can be easily folded into a small size and can be neatly restored to its original shape. [Solution] A megaphone (1) formed into a truncated cone shape by rolling up the main body (3) and inserting the extension piece (4) into the insertion slit (19), and the main body (3) is provided with a first fold line (21) formed from the right edge (7) to the left edge (8), a second fold line (22) formed from the right edge (7) toward the center of the front edge (5), and a third fold line (23) formed from the left edge (8) toward the center of the front edge (5) to form an approximately triangular shape.

Description

[Technical Field]

[0001] This invention relates to a megaphone used to liven up sports games and events. [Background technology]

[0002] Various types of megaphones of this type have been disclosed in the past.

[0003] For example, Patent Document 1 discloses a megaphone formed from a single paper sheet, which comprises a megaphone body with an insertion slit and an engaging protrusion that protrudes outward from the other edge of the megaphone body, and which can be assembled into a truncated cone shape by inserting the engaging protrusion into the insertion slit.

[0004] Patent Document 2 also discloses a megaphone that is formed into a trumpet shape by providing a fan-shaped base with a large arc on the top edge and a small arc on the bottom edge, with fold lines for folding the base, and providing a joining insert piece on one of the left and right oblique sides, and forming a corresponding insertion slit on the other into which the insert piece can be inserted. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3201633 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-316361 Summary of the Invention [Problem to be solved by the invention]

[0006] These megaphones are usually distributed at events in flat sheets that are then rolled up into a truncated cone shape for use.

[0007] However, after use, the volume is large in the molded state, and the area is large when opened flat, making it inconvenient to carry.

[0008] Therefore, if the device is forcibly folded to make it smaller, there is a problem that it will not be able to restore its original shape the next time it is used.

[0009] Furthermore, the megaphone in Patent Document 2 has multiple fold lines that radiate from the top edge to the bottom edge, but the length dimension does not become shorter, and once folded along the fold lines, it cannot be neatly restored to its original conical shape.

[0010] The present invention was made based on the above circumstances, and its purpose is to provide a megaphone that can be easily folded into a small size and can be neatly restored to its original shape. [Means for solving the problem]

[0011] In order to solve the above problems, the megaphone of the present invention comprises a main body surrounded by a fan shape by a front edge, a rear edge that is shorter than the front edge, a right edge connecting the right end of the front edge to the right end of the rear edge, and a left edge connecting the left end of the front edge to the left end of the rear edge, and having an insertion slit formed near one of the right or left edge, and an extension piece extending from the other of the right or left edge and inserted into the insertion slit, and is formed into a truncated cone shape by rolling the main body and inserting the extension piece into the insertion slit, and is characterized in that the main body has a first fold line formed from the right edge to the left edge, a second fold line formed from the right edge toward the center of the front edge, and a third fold line formed from the left edge toward the center of the front edge, forming an approximately triangular shape.

[0012] The first folding line is preferably provided substantially parallel to the rear edge.

[0013] Furthermore, it is preferable that the distance between the left end of the first crease and the left end of the third crease be greater than the extension length of the extension piece.

[0014] Furthermore, the main body preferably has an engagement slit that engages with the corner portion of the right end of the rear edge and the rear end of the right edge. [Effects of the Invention]

[0015] The megaphone of the present invention can be easily folded into a small size and can be neatly restored to its original shape. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a megaphone according to an embodiment of the present invention; [Figure 2] FIG. 2 is a plan view showing the megaphone in an unfolded state from the front side. [Figure 3] FIG. 2 is a bottom view showing the megaphone in an unfolded state from the rear side. [Figure 4] FIG. 2 is a plan view showing the megaphone in a folded state from the front side. [Figure 5] FIG. 2 is a bottom view showing the folded state of the megaphone from the rear side. [Figure 6] FIG. 2 is a perspective view showing the megaphone in an unfolded, self-standing state. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0018] In FIG. 1, reference numeral 1 designates an assembled megaphone according to the present invention, which megaphone 1 is formed from a single sheet 2, for example made of paper, as shown in FIGS.

[0019] The single sheet 2 has a main body 3 and a plurality of extension pieces 4.

[0020] When viewed from the surface side, the main body 3 is formed in a fan shape surrounded by a leading edge 5, a trailing edge 6 that is shorter than the leading edge 5, a right edge 7 that connects the right end of the leading edge 5 with the right end of the trailing edge 6, and a left edge 8 that connects the left end of the leading edge 5 with the left end of the trailing edge 6.

[0021] The leading edge 5 is formed in an arcuate shape to form a leading opening 9 in an assembled state, and the trailing edge 6 is formed in a wavy shape to form a trailing opening 10 in an assembled state.

[0022] The wavy rear edge 6 has a central recess 11 recessed toward the front edge 5 in the center in the left-right direction, a right recess 12 to the right of this central recess 11, and a left recess 13 to the left of it, and the recess depths of the right recess 12 and left recess 13 are formed smaller than the recess depth of the central recess 11.

[0023] A first folding piece 15 is connected to the central recess 11 via a first perforation 14, and in the assembled state is folded inward of the rear opening 10, protruding into the internal space of the megaphone 1 to protect the user's mouth.

[0024] In addition, a pair of second folding pieces 17 are connected near the rear edge 6 of the main body 3 via second perforations 16, and are folded inward into the internal space of the megaphone 1 when assembled, forming a hole 18 in the main body 3.

[0025] Furthermore, the main body 3 is formed with a plurality of insertion slits 19 near and along the right edge 7 .

[0026] Furthermore, a plurality of extension pieces 4 are integrally connected to the left edge 8 of the main body 3 so as to extend from the left edge 8, and by inserting these extension pieces 4 into the insertion slit 19 and removably engaging them, a truncated cone-shaped megaphone 1 is formed.

[0027] The main body 3 of the megaphone 1 formed in this manner has a first straight fold line 21 formed from the right edge 7 to the left edge 8, a second straight fold line 22 formed from the right edge 7 toward the center of the front edge 5, and a third straight fold line 23 formed from the left edge 8 toward the center of the front edge 5, which are arranged to form an approximately triangular shape.

[0028] That is, the first crease 21, the second crease 22, and the third crease 23 are formed so as to intersect with the radial direction of the fan-shaped main body 3.

[0029] The first crease 21, the second crease 22, and the third crease 23 are formed up to the vicinity of the front edge 5, the right edge 6, or the left edge 7, that is, they are formed so as not to be connected.

[0030] The first folding line 21 is provided substantially parallel to the rear edge 6.

[0031] Furthermore, the distance between the left end of the first crease 21 and the left end of the third crease 23 is greater than the extension length of the extension piece 4.

[0032] The main body 3 is divided into a central portion A surrounded by a first fold line 21, a second fold line 22, and a third fold line 23, a rear portion B outside the first fold line 21, a right front portion C outside the second fold line 22, and a left front portion D outside the third fold line 23, and the central portion A is printed with 24 advertisements or the like.

[0033] In addition, the right edge 7 is slightly bent toward the center part A at the boundary between the rear part B and the right front part C, so that it can be folded into a triangular shape no matter which crease is made along the first crease 21, the second crease 22, or the third crease 23.

[0034] As shown in FIG. 4, this print 24 is formed so as to be positioned on the front side when the sheet is folded.

[0035] Furthermore, in the left front part D of the main body 3 at a position that does not overlap with the right front part C in the folded state, an engagement slit 26 is provided into which the corner 25 between the right end of the rear edge 6 and the rear end of the right edge 7 is inserted and engaged, so that the megaphone 1 can be maintained in the folded state as shown in Figure 5.

[0036] The single sheet 2 formed as described above is printed 24 on a raw sheet (not shown) using, for example, offset printing, a digital printer, or an inkjet printer, and then is die-cut using, for example, a Thomson die-cutting machine.

[0037] In the above configuration, the megaphone 1 is distributed at events etc. in the form of a flat sheet, i.e., a single sheet 2, and is used by rolling it up into a truncated cone shape.

[0038] After use, the main body 3 can be easily folded into a small triangular shape by folding along the third crease 23, the second crease 22 and the first crease 21 in this order.

[0039] That is, the main body 3 is folded toward the back side along the third fold line 23, so that the left front portion D is overlapped on the back side of the central portion A, then folded toward the back side along the second fold line 22, so that the right front portion C is overlapped on the left front portion D, and then folded toward the back side along the first fold line 21, so that the rear portion B is overlapped on the right front portion C.

[0040] Therefore, the device can be made compact in both volume and area, making it convenient to carry around.

[0041] Moreover, by inserting and engaging the corner 25 between the right end of the rear edge 6 and the rear end of the right edge 7 into the engaging slit 26, the megaphone 1 can be held in the folded state.

[0042] Furthermore, when reused, the megaphone 1 can be opened from the folded state, the main body 3 can be rolled up again, and the extension piece 4 can be inserted into and engaged with the insertion slit 19, thereby forming it into a truncated cone shape.

[0043] In this case, the first fold line 21, the second fold line 22, and the third fold line 23 are formed so as to run against the radial direction of the fan-shaped main body 3, i.e., so as to intersect with the radial direction, so that the original shape can be neatly restored without damaging it.

[0044] Furthermore, as shown in FIG. 6, this megaphone 1 can be made to stand on its own by unfolding it from a folded state into a triangular stand, so that it can be displayed as an ornament.

[0045] In the above embodiment, the megaphone 1 is made of paper, but the present invention is not limited to this, and it may be made of, for example, plastic or PET (polyethylene terephthalate) material.

[0046] Furthermore, the print 24 is provided on the central portion A, but it may also be provided on the rear portion B, the right front portion C, and the left front portion D, in addition to the central portion A. [Explanation of symbols]

[0047] 1. Megaphone 3 Main unit 4 Extension piece 5 leading edge 6 Trailing edge 7 Right edge 8 Left edge 19 Insertion slit 21 First fold line 22 Second fold line 23 Third fold line 25 Corner 26 Engagement slit

Claims

1. a main body surrounded by a fan-shaped leading edge, a trailing edge shorter than the leading edge, a right edge connecting the right end of the leading edge and the right end of the trailing edge, and a left edge connecting the left end of the leading edge and the left end of the trailing edge, the main body having an insertion slit formed near one of the right edge or the left edge; an extension piece extending from the other of the right edge or the left edge and inserted into the insertion slit; The megaphone is formed into a truncated cone shape by rolling the main body and inserting the extension piece into the insertion slit, The body, a first fold line formed from the right edge to the left edge; a second fold line formed from the right edge toward the center of the front edge; a third fold line formed from the left edge toward the center of the front edge; are provided to form a triangular shape, A megaphone characterized by

2. 2. The megaphone according to claim 1, wherein the first folding line is provided substantially parallel to the rear edge.

3. The megaphone described in claim 1, characterized in that the distance between the left end of the first fold line and the left end of the third fold line or the distance between the left end of the first fold line and the left end of the third fold line is greater than the extension length of the extension piece.

4. 2. The megaphone according to claim 1, wherein the main body has an engagement slit that engages with a corner portion of the right end of the rear edge and the rear end of the right edge.

Images