WO2022249340A1

WO2022249340A1 - Filter support

Info

Publication number: WO2022249340A1
Application number: PCT/JP2021/020013
Authority: WO
Inventors: 敏男渡辺; 健吉藤井
Original assignee: 花王株式会社
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-12-01

Abstract

[Problem] To suppress emission of droplets from a megaphone. [Solution] Provided is a filter support that is attached to a megaphone body having a cylindrical shape, and comprises a cylindrical portion that is inserted in the megaphone body, and a filter that functions for a flow path passing through a hollow section of the cylindrical portion.

Description

filter support

The present invention relates to filter supports.

Conventionally, megaphones have been widely used for a variety of purposes, such as watching sports games, attracting people to stores, giving street speeches, and providing guidance at events. By putting the megaphone to the mouth and uttering, the user can deliver the voice more strongly in the direction in which the megaphone is directed, that is, amplify the voice. On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 2002-200010, a megaphone having a sound deadening property is also known.

Japanese Utility Model Laid-Open No. 63-84200

However, when using a megaphone for loudspeaking purposes, droplets are emitted from the megaphone as the user speaks. Emission of droplets may increase the risk of infection with bacteria, viruses, etc. of surrounding people.

The present invention relates to a filter support that suppresses the emission of droplets from a megaphone.

In order to solve the above problems, one aspect of the present invention is a filter support attached to a megaphone body having a tubular shape, comprising a tubular portion inserted into the megaphone main body and a hollow portion of the tubular portion. a filter that acts on a flow path therethrough. Regarding.

As described above, according to the filter support of the present invention, it is possible to suppress the ejection of droplets from the megaphone.

1 is an explanatory diagram showing a schematic configuration of a megaphone 10 according to a first embodiment of the present invention; FIG. 1A and 1B are side and plan views of a megaphone body 200 according to a first embodiment of the present invention; FIG. 3 is a cross-sectional view of the megaphone body 200 obtained when the megaphone body 200 is cut along line III-III in FIG. 2. FIG. 3 is a cut surface of the megaphone body 200 obtained when the megaphone body 200 is cut along line II-II in FIG. 1 is an exploded perspective view of a filter support 300 according to a first embodiment of the invention; FIG. 3 is a plan view of a support body 310; FIG. It is a cut surface of the megaphone 10 obtained when the megaphone 10 is cut along the II line shown in FIG. 1 is a cross-sectional view of a megaphone 10 according to a first embodiment of the invention; FIG. FIG. 10 is an explanatory diagram showing a schematic configuration of a megaphone 1010 according to a second embodiment of the present invention; 12 is a side view of megaphone body 1200. FIG. FIG. 13 is an external view of a filter support 1300 according to a second embodiment of the invention; FIG. 12 is an explanatory view showing a cross section obtained when the filter support 1300 is cut along line II shown in FIG. 11; FIG. 13 is an explanatory diagram showing a method of attaching and detaching the filter 1320; 13 is a cross-sectional view of megaphone 1010 with filter 1320 and filter support 1300 attached. FIG. Fig. 10 is an exploded perspective view of megaphone 1012 according to a third embodiment of the present invention; FIG. 16 is a cross-sectional view of an insertion-side outer tubular portion 1430 obtained by cutting the insertion-side outer tubular portion 1430 along line II-II shown in FIG. 15; FIG. 16 is a cross-sectional view of an inner tubular portion 1440 obtained by cutting the inner tubular portion 1440 along the line II-II shown in FIG. 15; 14 is a cross-sectional view of megaphone 1012 with filter support 1400 attached. FIG.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and drawings, constituent elements having substantially the same functional configuration are denoted by the same reference numerals, thereby omitting redundant description.

One embodiment of the present invention relates to a megaphone. The megaphone has a hollow inside, and can deliver the voice uttered by the user more strongly in the direction in which the megaphone is directed, that is, amplify the sound. Megaphones can be used for a variety of purposes, such as watching sports, calling in stores, making public speeches, and providing guidance at events. The megaphone of the present invention is provided with a filter in a channel passing through its inside. In particular, according to one embodiment of the present invention, there is provided a filter support having a tube inserted into the megaphone body and a filter acting on a flow path passing through the hollow of the tube. . There are various ways of inserting the tube into the megaphone body. Several embodiments of the present invention are described below. As the megaphone according to one embodiment of the present invention, a non-electronic megaphone that is not accompanied by volume expansion by an electronic circuit is mainly assumed.

<<First Embodiment>>
<Outline configuration of megaphone>
FIG. 1 is an explanatory diagram showing a schematic configuration of a megaphone 10 according to a first embodiment of the invention. As shown in FIG. 1, the megaphone 10 according to the first embodiment of the invention has a megaphone body 200 and a filter support 300 .

(Megaphone body 200)
The megaphone main body 200 is a cylindrical member having a pair of opposed openings. As shown in FIG. 1, the megaphone body 200 has a mouthpiece region 210, a loudspeaker region 220 and an intermediate region 230. As shown in FIG.

The mouthpiece-side region 210 is an example of a first region, and has a mouthpiece 212 that is the first opening of a pair of opposing openings. The edge of the mouthpiece 212 is applied to the user's mouth, and the voice uttered by the user is transmitted to the inside of the megaphone 10 through the mouthpiece 212. - 特許庁As shown in FIG. 1, the mouthpiece 212 may be curved to conform to the shape of the user's mouth. The outer and inner diameters of mouthpiece-side region 210 decrease from mouthpiece 212 toward intermediate region 230 . That is, the diameter of the mouthpiece side region 210 decreases from the mouthpiece 212 toward a loudspeaker mouth 224 as a second opening, which will be described later.

In this specification, the axial direction of the megaphone body 200 is referred to as the front-rear direction (the X-axis direction shown in FIG. 1), the direction toward the mouthpiece 212 is the rearward direction, and the direction toward the loudspeaker port 224 (to be described later) is the forward direction. Sometimes referred to as direction. Also, the direction of the line connecting the pair of opposing ends formed to the rearmost side at the edge of the blowing port 212 is referred to as the width direction (the Y-axis direction shown in FIG. 1). is sometimes referred to as the vertical direction (the Z-axis direction shown in FIG. 1).

The loudspeaker side area 220 is an example of a second area, and has a loudspeaker opening 224 that is the second opening of the pair of opposing openings. The inner diameter of loudspeaker 224 is larger than the inner diameter of mouthpiece 212 . The voice uttered by the user is emitted from the loudspeaker 224 in the direction to which the loudspeaker 224 is directed. The outer and inner diameters of the loudspeaker side region 220 decrease from the loudspeaker 224 toward the intermediate region 230 , ie, increase from the intermediate region 230 toward the loudspeaker 224 . That is, the diameter of the loudspeaker side region 220 decreases from the loudspeaker 224 toward the mouthpiece 212 .

The intermediate area 230 is an example of a third area and is located between the mouthpiece side area 210 and the loudspeaker side area 220 . In this embodiment, the outer diameter and inner diameter of the intermediate region 230 are substantially constant in the front-rear direction. The middle area 230 is the area that is gripped by the user. The intermediate region 230 has a notch that is an opening formed along the circumferential direction, and the filter support 300 can be attached to and detached from the megaphone body 200 by inserting the filter support 300 into the notch. is attached to the That is, the megaphone 10 has a structure in which the filter 320 is detachable.

Note that in FIG. 1, there is a mouthpiece side region 210 whose outer diameter and inner diameter decrease from the mouthpiece 212 toward the middle region 230, and a loudspeaker mouth whose outer diameter and inner diameter increase from the middle region 230 toward the loudspeaker mouth 224. Although the megaphone body 200 is shown with side regions 220, the shape of the megaphone body 200 is not limited to the example shown in FIG. For example, the outer diameter and inner diameter of the megaphone main body 200 may be substantially constant over the entire front-rear direction, or may monotonically increase from the mouthpiece 212 to the loudspeaker mouth 224 . The outer diameter and inner diameter of the intermediate region 230 may decrease from the mouthpiece 212 to the loudspeaker mouth 224 in the same manner as the mouthpiece side region 210, or conversely, from the loudspeaker mouth 224 to the mouthpiece. The diameter may decrease towards 212 . Further, the cross-sectional shape of the megaphone main body 200 perpendicular to the front-rear direction is not limited to a circle, and may be an ellipse or a shape imitating a plurality of petals.

(Filter support 300)
The filter support 300 is attached to the middle region 230 of the megaphone body 200 as described above. The filter support 300 supports the filter along a plane perpendicular to the front-rear direction. The filter may be, for example, a filter with non-woven fabric. Nonwoven fabric materials include polyester, polyethylene, polypropylene, rayon, nylon, pulp, and the like, and these resins can be used singly or in combination of two or more. The user's exhalation, which flows in through the mouthpiece 212 as the user speaks, passes through the filter and is emitted from the loudspeaker opening 224 .

Nonwoven fabrics include, for example, spunlaced nonwoven fabrics, air-through nonwoven fabrics, spunbond nonwoven fabrics, airlaid nonwoven fabrics, meltblown nonwoven fabrics, flash-spun nonwoven fabrics, thermal-bonded nonwoven fabrics, carded nonwoven fabrics, and nonwoven fabrics in which some of these are combined. Further, the filter may be a single-layer filter or a laminate obtained by laminating a plurality of single-layer nonwoven fabrics. When the filter has a multi-layered structure, it becomes possible to collect more foreign substances such as viruses and bacteria.

The basis weight of the nonwoven fabric is preferably 1 g/m ² or more, more preferably 2 g/m ² or more, from the viewpoint of preventing splashes (from the viewpoint of collecting foreign substances such as bacteria and viruses). /m ² or less, and more preferably 70 g/m ² or less. Moreover, the fiber density of the nonwoven fabric is preferably 0.02 g/cm ³ or more, and preferably 0.4 g/cm ³ or less, from the viewpoint of collecting foreign matter.

The filter is not limited to nonwoven fabric, and may be a porous fiber sheet obtained by heat-melting a material and drawing it. Also, the fiber sheet may contain fibril fibers.

Therefore, when the user's breath contains foreign substances such as bacteria or viruses, the amount of foreign substances such as bacteria or viruses emitted from the loudspeaker 224 can be reduced. As a result, it is possible to reduce the risk of people around the user being infected with bacteria or viruses. Hereinafter, the configurations of the megaphone body 200 and the filter support 300 according to the first embodiment of the present invention will be sequentially described in detail.

<Structure of megaphone body 200>
FIG. 2 is a side view and a plan view of the megaphone body 200 according to the first embodiment of the invention. FIG. 3 is a sectional view of the megaphone body 200 obtained by cutting the megaphone body 200 along line III-III in FIG. FIG. 4 is a cut surface of the megaphone body 200 obtained when the megaphone body 200 is cut along line II-II in FIG.

As shown in FIG. 2, the intermediate region 230 of the megaphone body 200 is formed with a notch 232 that is an opening along the circumferential direction. As shown in FIG. 4 , the notch 232 is formed within a range having a central angle of less than 180 degrees in the entire circumferential direction of the intermediate region 230 . Further, as shown in the side view of FIG. 2 and FIG. 4, a hole 234 is formed in the intermediate region 230 at a position facing the notch 232 .

In addition, as shown in FIG. 3, an annular portion 236 that protrudes toward the inner peripheral side of the intermediate region 230 is formed, including a portion serving as a front edge forming the notch portion 232 . The annular portion 236 may be formed continuously along the circumferential direction of the intermediate region 230, or may be formed intermittently.

<Configuration of Filter Support 300>
The configuration of the megaphone body 200 according to the first embodiment of the present invention has been described above. Next, the configuration of the filter support 300 according to the first embodiment of the present invention will be described with reference to FIGS. 5 to 7. FIG.

FIG. 5 is an exploded perspective view of the filter support 300 according to the first embodiment of the invention. As shown in FIG. 5, the filter support 300 according to the first embodiment of the invention has a support body 310, a filter 320 and a filter cap 330. As shown in FIG.

(Support main body 310)
The support main body 310 has a cylindrical portion 312 , a stringing portion 314 , a stepped portion 316 and a support portion 317 . 6 and 7 in addition to FIG. 5, the description of the configuration of each part of the support body 310 will proceed. FIG. 6 is a plan view of the support body 310. FIG. FIG. 7 is a cross section of the megaphone 10 obtained by cutting the megaphone 10 along line II shown in FIG.

The tubular portion 312 is inserted into the megaphone body 200 through the notch 232 of the megaphone body 200 . The tubular portion 312 has a first circumferential region 3121 and a second circumferential region 3122 . As shown in FIG. 6, the outer diameter d1 of the first circumferential region 3121 is larger than the outer diameter d2 of the second circumferential region 3122. As shown in FIG. It is desirable that the difference between the outer diameter d1 and the outer diameter d2 is equal to or greater than the edge thickness of the notch 232 in the megaphone main body 200. FIG.

A string hooking portion 314 having a hole 315 is formed as a first convex portion on the outer peripheral surface of the first circumferential region 3121 . Similarly, a string hooking portion 314 having a hole 315 is formed as a second projection on the outer peripheral surface of the second circumferential region 3122 . A string can be passed through the holes 315 of these string hooking portions 314 .

As shown in FIG. 7, the first circumferential region 3121 fits into the notch 232 when the tubular portion 312 is inserted into the megaphone main body 200 through the notch 232 . The second circumferential region 3122 contacts the inner circumferential surface of the intermediate region 230 . Also, the string hooking portion 314 formed on the outer peripheral surface of the second circumferential region 3122 protrudes from the hole 234 formed in the intermediate region 230 .

The stepped portion 316 is formed at the edge of the second circumferential region 3122 on the side of the filter cap 330 . As shown in FIG. 5, a pair of stepped portions 316 may be formed at positions facing each other on the edge of the second circumferential region 3122 on the side of the filter cap 330 .

The support part 317 is positioned inside the cylindrical part 312 and formed along a direction intersecting the direction of the flow path passing through the hollow part of the cylindrical part 312 . In the example shown in FIG. 5, the support portion 317 partitions a ring region 3171 adjacent to the inner peripheral surface of the cylindrical portion 312 and a hollow portion of the support body 310 in a plan view of the support body 310 into a plurality of openings. It has a first linear region 3172 and a second linear region 3173 . In the example shown in FIG. 5, the hollow portion of the support body 310 is partitioned into four openings in a plan view of the support body 310 . The configuration of the support portion 317 is not limited to the above example, and the support portion 317 may be formed such that the hollow portion of the support body 310 is partitioned into openings of other shapes or more openings.

(Filter 320)
The filter 320 is put on the support portion 317 of the support body 310 so as to cover each opening partitioned by the support portion 317 . As a result, the filter 320 exhibits a function of filtering bacteria, viruses, and the like from the flow path passing through the hollow portion of the cylindrical portion 312 .

(Filter cap 330)
The filter cap 330 is an example of a facing portion that faces the support portion 317 and sandwiches the filter 320 with the support portion 317 . The filter cap 330 has a pair of projecting portions 336 and a lid portion 337 as shown in FIG. The pair of protruding portions 336 protrude outward from positions facing each other in the circumferential direction of the lid portion 337 . The rotation position of the filter cap 330 is fixed by fitting the projecting portion 336 into the stepped portion 316 of the support body 310 .

The lid portion 337 has a shape corresponding to the support portion 317 . Specifically, the lid portion 337 has a ring region 3371, and a first straight region 3372 and a second straight region 3373 that divide the hollow portion of the ring region 3371 into a plurality of openings.

<Effect>
According to the first embodiment of the present invention described above, various effects can be obtained. For example, as shown in FIG. 8, the filter support 300 according to the first embodiment of the present invention supports the filter 320 along the plane that intersects the flow path passing through the hollow portion of the tubular portion 312 . For this reason, the user's exhaled air that has flowed in through the mouthpiece 212 is filtered by the filter 320 as indicated by the arrow in FIG. Therefore, when the user's exhalation contains foreign substances such as bacteria or viruses, the amount of foreign substances such as bacteria or viruses emitted from the loudspeaker 224 can be reduced. As a result, it is possible to reduce the risk of people around the user being infected with bacteria or viruses. In addition, since there is no member that obstructs the flow path between the filter 320 and the loudspeaker opening 224, the hollow structure allows efficient sound amplification.

Further, according to the first embodiment of the present invention, by inserting the filter support 300 into the notch 232 formed in the megaphone main body 200 and removing the filter support 300 from the notch 232, The filter support 300 can be attached to and detached from the megaphone body 200 . Therefore, replacement of the filter 320 can be easily realized.

Further, according to the first embodiment of the present invention, the outer diameter d1 of the first circumferential region 3121 in the cylindrical portion 312 is larger than the outer diameter d2 of the second circumferential region 3122. The difference in diameter is equal to or larger than the edge thickness t1 of the notch 232 of the megaphone body 200 . With such a configuration, it is possible to achieve a design in which there is no step between the outer peripheral surface of the intermediate region 230 and the outer peripheral surface of the first circumferential region 3121 that fits into the notch 232 .

Further, according to the first embodiment of the present invention, the string hooking portion 314 having the hole 315 is formed on the outer peripheral surface of the first circumferential region 3121 . The user can hang the megaphone 10 around the neck through the string by passing the string through the hole 315 of the string hooking portion 314 . As a result, for example, loss of the megaphone 10 can be suppressed. In addition, the user can pull the stringing portion 314 to remove the filter support 300 from the tubular portion 312 .

Further, according to the first embodiment of the present invention, the string hooking portion 314 having the hole 315 is also formed on the outer peripheral surface of the second circumferential region 3122 , and the string hooking portion 314 is formed in the intermediate region 230 . It is inserted into the formed hole 234 and protrudes from the hole 234 . The user can hang the megaphone 10 around the neck through the string by passing the string through the hole 315 of the string hooking portion 314 . In addition, the user can also remove the filter support 300 from the cylindrical portion 312 by pressing the stringing portion 314 .

Further, according to the first embodiment of the present invention, the support portion 317 is formed along the direction intersecting the flow path passing through the hollow portion of the tubular portion 312 . By arranging the filter 320 along the support portion 317 , the filter 320 can exert a filtering function on the flow path passing through the hollow portion of the cylindrical portion 312 .

Further, according to the first embodiment of the present invention, the support portion 317 has a shape that partitions the hollow portion into a plurality of openings in plan view of the tubular portion 312 . Such a configuration makes it difficult for the user's fingers to touch the filter 320 . Furthermore, it is possible to prevent the filter 320 from coming off the support body 310 .

The filter support 300 according to the first embodiment of the present invention also has a filter cap 330 that sandwiches the filter 320 between itself and the support body 310 . Such a configuration can more reliably prevent the filter 320 from coming off the support body 310 .

In addition, the megaphone body 200 according to the first embodiment of the present invention has an annular portion 236 that protrudes toward the inner peripheral side of the megaphone body 200 and includes a portion that serves as an edge forming the notch portion 232 . Since the annular portion 236 restricts the movement of the filter cap 330 toward the loudspeaker opening 224, it is possible to prevent the filter cap 330 from falling off. Annular portion 236 may also function as a guide when inserting filter support 300 into notch 232 .

Further, according to the first embodiment of the present invention, a notch 232 is formed in the intermediate region 230 of the megaphone body 200, and the filter support 300 is inserted into the notch 232. Since the intermediate region 230 has the smallest outer diameter in the megaphone main body 200, the size reduction of the filter support 300 can be realized according to the above configuration.

<Supplement>
Although an example in which the support body 310 and the filter cap 330 are configured to be separable in the filter support 300 has been described above, other configurations may be applied to the filter support 300 . For example, the support body 310 and the filter cap 330 may be connected via a hinge so that the filter cap 330 can be opened and closed between a closed state and an open state with respect to the support body 310 . Such a configuration prevents loss of the filter cap 330 . Alternatively, the filter cap 330 may be formed with a pair of protrusions facing each other, and the support body 310 may be formed with a pair of recesses into which the protrusions are fitted. In this case, the filter cap 330 can be opened and closed by rotating with respect to the support body 310 around the axis connecting the pair of protrusions. The axis connecting the pair of protrusions may be parallel to the width direction or may be parallel to the vertical direction.

In the above description, the notch 232 is formed in the intermediate region 230 of the megaphone body 200, and the filter support 300 is inserted into the notch 232. A portion 232 may be formed. For example, the notch 232 may be formed in the mouthpiece side region 210 or may be formed in the loudspeaker side region 220 .

In the first embodiment, an example in which the cross section of the intermediate region 230 in the megaphone body 200 is curved in an arc shape has been described, but a part of the cross section of the intermediate region 230, for example, an area including the upper end of the intermediate region 230 and A region including the lower end and a straight portion having a linear shape parallel to the width direction may be used. With such a configuration, it is possible to improve the detachability and fixability of the filter support 300 .

<<Second Embodiment>>
<Outline configuration of megaphone>
FIG. 9 is an explanatory diagram showing a schematic configuration of the megaphone 1010 according to the second embodiment of the invention. As shown in FIG. 9, the megaphone 1010 according to the second embodiment of the invention has a megaphone body 1200 and a filter support 1300. The megaphone body 1200 and the filter support 1300 are shown in FIG. The megaphone body 1200 according to the second embodiment of the present invention is universally manufactured and the filter support 1300 may be designed to match the size and shape of the megaphone body 1200 . Alternatively, the megaphone body 1200 according to the second embodiment of the invention may be specially manufactured for the filter support 1300 . The manufacturer of the megaphone body 1200 and the manufacturer of the filter support 1300 may be different or the same.

(Megaphone body 1200)
The megaphone main body 1200 is a cylindrical member having a pair of opposing main body openings. As shown in FIG. 9, the megaphone body 1200 has a mouthpiece region 1210, a loudspeaker region 1220 and an intermediate region 1230. As shown in FIG.

10 is a side view of the megaphone body 1200. FIG. The mouthpiece-side region 1210 has a mouthpiece 1212 , which is one of the pair of opposing body openings, and a curled portion 1213 . The curled portion 1213 is the edge of the mouthpiece 1212 and protrudes toward the outer periphery of the mouthpiece-side region 1210 by being wound around the outer periphery of the mouthpiece-side region 1210 . The outer and inner diameters of the mouthpiece region 1210 decrease from the mouthpiece 1212 toward the intermediate region 1230 . As shown in FIG. 9, a filter support 1300 is attached to the mouthpiece region 1210 .

In this specification, the axial direction of the megaphone body 1200 is referred to as the front-rear direction (the X-axis direction shown in FIG. 9), the direction toward the mouthpiece 1212 is the rearward direction, and the direction toward the loudspeaker port 1224 (to be described later) is the forward direction. Sometimes referred to as direction. Further, the direction of a line connecting a pair of opposing ends formed to the rearmost side at the edge of a mouth-side opening 1312 (to be described later) of the filter support 1300 is referred to as the width direction (the Y-axis direction shown in FIG. 9). , the direction orthogonal to both the front-rear direction and the width direction may be referred to as the vertical direction (the Z-axis direction shown in FIG. 9).

The loudspeaker side region 1220 has a loudspeaker opening 1224 which is the other opening of the pair of opposing main body openings. The inner diameter of loudspeaker 1224 is larger than the inner diameter of mouthpiece 1212 . The voice uttered by the user is emitted from the loudspeaker 1224 in the direction to which the loudspeaker 1224 is directed. The outer and inner diameters of the loudspeaker side region 1220 decrease from the loudspeaker 1224 to the middle region 1230 , ie, they increase from the middle region 1230 to the loudspeaker 1224 .

The middle region 1230 is located between the mouthpiece side region 1210 and the loudspeaker side region 1220 . The inner diameter of the intermediate region 1230 is substantially constant in the front-rear direction. The middle area 1230 is the area that is gripped by the user.

Note that in FIG. 10, the outlet side region 1210 whose outer diameter and inner diameter decrease from the outlet 1212 toward the intermediate region 1230, and the loudspeaker whose outer diameter and inner diameter increase from the intermediate region 1230 toward the loudspeaker port 1224. Although megaphone body 1200 is shown with side regions 1220, the shape of megaphone body 1200 is not limited to the example shown in FIG. For example, the outer diameter and inner diameter of the megaphone main body 1200 may be generally constant throughout the front-rear direction, or may monotonically increase from the mouthpiece 1212 to the loudspeaker mouth 1224 . Also, the cross section in the width direction may be elliptical or flower-shaped, and can be changed within a range that does not hinder the effects of the present invention.

(Filter support 1300)
Filter support 1300 has a cylindrical shape with a pair of opposed openings. The mouth-side opening 1312 is one of a pair of opposing openings. The edge of the mouth-side opening 1312 is applied to the user's mouth, and the voice uttered by the user is transmitted to the inside of the megaphone 1010 through the mouth-side opening 1312 . As shown in FIG. 9, the mouth opening 1312 may be curved to conform to the shape of the user's mouth.

In addition, the filter support 1300 supports the filter along a plane perpendicular to the front-rear direction. The filter may be, for example, a filter with non-woven fabric. Nonwoven fabric materials include polyester, polyethylene, polypropylene, rayon, nylon, pulp, and the like, and these resins can be used singly or in combination of two or more. The user's exhalation, which flows in through the mouth-side opening 1312 as the user speaks, passes through the filter and is emitted from the loudspeaker opening 1224 .

Therefore, when the user's breath contains foreign substances such as bacteria or viruses, the amount of foreign substances such as bacteria or viruses emitted from the loudspeaker 1224 can be reduced. As a result, it is possible to reduce the risk of people around the user being infected with bacteria or viruses. Hereinafter, the configuration of the filter support 1300 according to the second embodiment of the present invention will be sequentially described in detail.

<Detailed Configuration of Filter Support 1300>
FIG. 11 is an external view of a filter support 1300 according to a second embodiment of the invention. FIG. 12 is an explanatory diagram showing a cross section obtained when the filter support 1300 is cut along line II shown in FIG.

As shown in FIG. 11, the filter support 1300 according to the second embodiment of the present invention includes a tubular portion 1310, a stringing portion 1314, and a fitting portion 1316.

The cylindrical portion 1310 consists of a first region 13101 and a second region 13102 as shown in FIG. A first region 13101 is a region inserted from the mouthpiece 1212 of the megaphone body 1200 and buried in the megaphone body 1200 , and a second region 13102 is a region exposed from the megaphone body 1200 without being inserted into the megaphone body 1200 . A mouth side opening 1312 is formed on the first area 13101 side, and a loudspeaker side opening 1313 is formed on the second area 13102 side.

The string hooking part 1314 is a convex part formed on the outer peripheral surface of the tubular part 1310 and has a hole 1315 . A string may be threaded through the hole 1315 . Although FIG. 11 shows an example in which one string hooking portion 1314 is formed on the cylindrical portion 1310 , a plurality of string hooking portions 1314 may be formed on the cylindrical portion 1310 .

The fitting portion 1316 protrudes from the outer peripheral surface of the tubular portion 1310 . An annular groove 1317 is formed in the fitting portion 1316 . The fit between the groove 1317 and the curled portion 1213 of the megaphone main body 1200 makes it difficult for the filter support 1300 to come off from the megaphone main body 1200 . Fitting portion 1316 may be formed of a soft material such as an elastomer, or may be formed of a harder material.

(Method for attaching and detaching filter 1320)
13A and 13B are explanatory diagrams showing a method of attaching and detaching the filter 1320. FIG. As shown in FIG. 13, the user places the filter 1320 between the filter support 1300, the loudspeaker-side opening 1313, and the mouthpiece 1212 of the megaphone body 1200, and moves the filter support as indicated by the arrow. Insert 1300 into mouthpiece 1212 . As a result, the filter 1320 is pushed into the mouthpiece 1212 while covering the loudspeaker side opening 1313 .

When the fitting portion 1316 of the filter support 1300 reaches the curled portion 1213 of the megaphone main body 1200 , the user fits the curled portion 1213 into the fitting portion 1316 . This completes the attachment of filter 1320 and filter support 1300 .

FIG. 14 is a cross-sectional view of megaphone 1010 with filter 1320 and filter support 1300 attached. As shown in FIG. 14, filter 1320 covers loudspeaker side opening 1313 of filter support 1300 . Filter 1320 is bent at the edge of cylindrical portion 1310 of filter support 1300, and the edge of filter 1320 is supported by being sandwiched between the outer peripheral surface of cylindrical portion 1310 of filter support 1300 and the inner peripheral surface of megaphone body 1200. be.

When removing the filter 1320 , the user releases the engagement between the fitting portion 1316 and the curled portion 1213 and pulls out the filter support 1300 from the mouthpiece 1212 of the megaphone body 1200 . The user can then remove the filter 1320 from the megaphone body 1200 and install a new filter 1320 .

<Effect>
According to the second embodiment of the present invention described above, various effects can be obtained. For example, the filter support 1300 according to the second embodiment of the present invention supports the filter 1320 along the plane that intersects the flow path passing through the hollow portion of the tubular portion 1310, as shown in FIG. Therefore, the user's exhaled air that has flowed in through the mouth-side opening 1312 is filtered by the filter 1320 as indicated by the arrow in FIG. Therefore, when the user's exhalation contains foreign substances such as bacteria or viruses, the amount of foreign substances such as bacteria or viruses emitted from loudspeaker 1224 can be reduced. As a result, it is possible to reduce the risk of people around the user being infected with bacteria or viruses. In addition, since there is no member obstructing the flow path between the filter 1320 and the loudspeaker opening 1224, the sound can be efficiently amplified.

Further, according to the second embodiment of the present invention, the filter support 1300 is attached to and detached from the megaphone main body 1200 by inserting the filter support 1300 into the mouthpiece 1212 and pulling out the filter support 1300 from the mouthpiece 1212. It is possible. Therefore, replacement of the filter 1320 can be easily realized.

Further, according to the second embodiment of the present invention, a fitting portion 1316 is protruded from the cylindrical portion 1310 of the filter support 1300 . By fitting the fitting portion 1316 to the curled portion 1213 of the megaphone body 1200 , the filter support 1300 becomes difficult to come off from the megaphone body 1200 .

Also, according to the second embodiment of the present invention, the mouth-side opening 1312 of the filter support 1300 is curved to match the shape of the user's mouth. Therefore, it is difficult for the user's exhalation to leak from between the user's mouth and the edge of the mouth-side opening 1312, so that it is possible to suppress the spread of droplets.

Further, according to the second embodiment of the present invention, the outer peripheral surface of the filter support 1300 is formed with a string hooking portion 1314 having a hole 1315 . The user can hang the megaphone 1010 around the neck through the string by passing the string through the hole 1315 of the string hooking portion 1314 . As a result, for example, loss of the megaphone 1010 can be suppressed.

<<Third Embodiment>>
The second embodiment of the present invention has been described above. Next, a third embodiment of the invention will be described. In a third embodiment of the invention, the filter support is made up of multiple parts. The configuration of the megaphone 1012 according to the third embodiment of the present invention will be described below.

(Constitution)
FIG. 15 is an exploded perspective view of megaphone 1012 according to a third embodiment of the present invention. As shown in FIG. 15, the megaphone 1012 according to the third embodiment has a megaphone body 1200 and a filter support 1400 . Since the configuration of the megaphone main body 1200 is as described in the second embodiment, detailed description thereof will be omitted here.

The filter support 1400 has a mouth side part 1402 and an insertion side part 1403 . Mouth-side part 1402 has mouth-side outer cylindrical portion 1410 and fitting portion 1416 . The insertion side part 1403 has an insertion side outer tubular portion 1430 and an inner tubular portion 1440 . The inner tubular portion 1440 is overlapped inside the insertion-side outer tubular portion 1430 . The inner peripheral surface of the insertion-side outer tubular portion 1430 and the outer peripheral surface of the inner tubular portion 1440 sandwich and support the edge of the filter 1320 .

16 is a cross-sectional view of the insertion-side outer cylinder portion 1430 obtained by cutting the insertion-side outer cylinder portion 1430 along the line II-II shown in FIG. 15, and FIG. FIG. 4 is a cross-sectional view of an inner tubular portion 1440 obtained by cutting the inner tubular portion 1440 along a line; As shown in FIG. 16 , the insertion side outer tube portion 1430 has a tube portion 1432 , an insertion side opening 1434 and a mouth side opening 1435 . The outer diameter and inner diameter of cylindrical portion 1432 decrease from mouth side opening 1435 toward insertion side opening 1434 .

As shown in FIG. 17, the inner tubular portion 1440 has a tubular portion 1442, an insertion side opening 1444, a mouth side opening 1445 and a projecting portion 1446. The outer diameter and inner diameter of cylindrical portion 1442 decrease from mouth side opening 1445 toward insertion side opening 1444 . The protruding portion 1446 is formed on the inner peripheral surface of the cylindrical portion 1442 and protrudes from the mouth side opening 1445 .

(Method for attaching and detaching filter 1320)
The user inserts the inner cylinder portion 1440 into the insertion side outer cylinder portion 1430 with the filter 1320 placed between the mouth side opening 1435 of the insertion side outer cylinder portion 1430 and the insertion side opening 1444 of the inner cylinder portion 1440. do. As a result, the filter 1320 is pushed into the insertion side outer tube portion 1430 while covering the insertion side opening 1444 of the inner tube portion 1440 .

Furthermore, the user inserts the insertion side part 1403 consisting of the insertion side outer cylinder part 1430, the filter 1320 and the inner cylinder part 1440 from the mouthpiece 1212 of the megaphone main body 1200, and further inserts the mouth side part 1402 into the mouthpiece 1212. . When the fitting portion 1416 of the filter support 1400 reaches the curled portion 1213 of the megaphone body 1200 , the user fits the curled portion 1213 into the fitting portion 1416 . This completes the mounting of the filter support 1400 that supports the filter 1320 .

FIG. 18 is a cross-sectional view of megaphone 1012 with filter support 1400 attached. As shown in FIG. 18, the filter 1320 is supported along a plane that intersects the flow paths passing through the hollow portions of the mouth side part 1402 and the insertion side part 1403 . The inner peripheral surface of the inner tubular portion 1440 and the outer peripheral surface of the insertion-side outer tubular portion 1430 sandwich and support the edge of the filter 1320 .

When removing the filter 1320 , the user releases the fitting between the fitting portion 1416 and the curled portion 1213 and pulls out the mouth side part 1402 from the mouthpiece 1212 of the megaphone body 1200 . Further, the user pulls the insertion side part 1403 out of the mouthpiece 1212 of the megaphone main body 1200 by pinching and pulling the projecting portion 1446 of the inner cylindrical portion 1440 . The user can then remove the inner tube 1440 from the insertion side outer tube 1430 and mount a new filter 1320 between the insertion side outer tube 1430 and the inner tube 1440 .

(Effect)
According to the third embodiment of the present invention described above, the same effects as those of the second embodiment can be obtained. In addition, since the filter support 1400 is separated into the mouth side part 1402 and the insertion side part 1403, it is possible to easily attach the filter 1320 and the filter support 1400 to the megaphone main body 1200. FIG.

Further, according to the third embodiment of the present invention, a projecting portion 1446 is formed on the inner peripheral surface of the inner tubular portion 1440 . The user can easily pull out the insertion side part 1403 from the megaphone main body 1200 by pinching the protrusion 1446 .

<<Supplement>>
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the technical scope of the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field of the present invention can conceive of various modifications or modifications within the scope of the technical idea described in the claims. is naturally within the technical scope of the present invention.

For example, although an example in which the filter support 1300 is inserted into the mouthpiece 1212 of the megaphone body 1200 has been described above, the filter support 1300 may be designed to be inserted into the loudspeaker mouth 1224 of the megaphone body 1200 . Additionally, filter support 1300 may be inserted into both mouthpiece 1212 and loudspeaker 1224 of megaphone body 1200 . According to such a configuration, it is possible to further suppress the ejection of droplets.

10 megaphone 200 megaphone main body 210 mouthpiece side region 212 mouthpiece 220 loudspeaker side region 224 loudspeaker mouth 230 middle region 232 notch 234 hole 236 annular portion 300 filter support 310 support main body 312 cylindrical portion 3121 first circumferential direction Region 3122 Second circumferential region 314 Strap hooking portion 315 Hole 316 Stepped portion 317 Support portion 3171 Ring region 3172 First linear region 3173 Second linear region 320 Filter 330 Filter cap 336 Overhanging portion 337 Lid portion 3371 Ring region 3372 1 linear region 3373 second

linear region

1010, 1012 megaphone 1200 megaphone body 1210 mouthpiece side region 1212 mouthpiece 1213 curled portion 1220 loudspeaker side region 1224 loudspeaker mouth 1230 middle region 1300 filter support 1310 cylindrical portion 13101 first region 13102 2 area 1312 mouth side opening 1313 loudspeaker side opening 1314 string hooking part 1315 hole 1316 fitting part 1317 annular groove 1320 filter 1400 filter support 1402 mouth side part 1403 insertion side part 1410 cylinder part 1416 fitting part 1430 insertion side outer cylinder part 1432 cylinder part 1434 insertion side opening 1435 mouth side opening 1440 inner cylinder part 1442 cylinder part 1444 insertion side opening 1445 mouth side opening 1446 protrusion

Claims

A filter support attached to a cylindrical megaphone body,
a cylindrical portion inserted into the megaphone main body;
a filter that functions for a flow path passing through the hollow portion of the cylindrical portion;
a filter support.
The megaphone body has a notch along the circumferential direction,
2. The filter support according to claim 1, wherein the tubular portion is inserted into the megaphone body through the notch, and a portion of the tubular portion in the circumferential direction fits into the notch.
The cylindrical portion has a first circumferential region that fits in the notch and a second circumferential region that is a region other than the first circumferential region,
3. The filter support of claim 2, wherein the outer diameter of said first circumferential region is greater than the outer diameter of said second circumferential region.
4. The method according to claim 3, wherein the difference between the outer diameter of said first circumferential region and the outer diameter of said second circumferential region is greater than or equal to the thickness of the edge of said notch in said megaphone main body. filter support.
The filter support according to claim 3 or 4, wherein a first projection having a hole is formed on the outer peripheral surface of the first circumferential region.
A hole is formed at a position facing the notch of the megaphone body,
The filter support according to any one of claims 3 to 5, wherein the outer peripheral surface of the second circumferential region has a hole, and a second projection projecting from the hole is formed.
further comprising a support portion positioned inside the cylindrical portion and supporting the filter;
The filter support according to any one of claims 2 to 6, wherein said support portion is formed along a direction crossing the direction of said flow path.
The filter support according to claim 7, wherein the support portion has a shape that partitions the hollow portion into a plurality of openings in plan view of the cylindrical portion.
The filter support according to claim 7 or 8, further comprising a facing portion that faces the support portion and sandwiches the filter between the support portion and the support portion.
a filter support according to any one of claims 2 to 9;
the megaphone main body;
with a megaphone.
11. The megaphone according to claim 10, having an annular portion protruding to the inner peripheral side of the megaphone main body, including a portion serving as an edge forming the notch.
The megaphone body is
having a first opening and a second opening facing the first opening;
A first region whose diameter decreases from the first opening toward the second opening, a second region whose diameter decreases from the second opening toward the first opening, and the first region Having a third region located between the second regions,
12. A megaphone according to claim 10 or 11, wherein said notch is formed in said third region.
The filter support according to claim 1, wherein the tubular portion is inserted into a body opening that is an opening of the megaphone body.
The filter support according to claim 13, wherein a fitting portion that fits into the edge of the main body opening is projected from the outer peripheral surface of the tubular portion.
The cylindrical portion has a first region inserted into the megaphone body from the body opening and a second region exposed from the megaphone body,
15. The filter support according to claim 13 or 14, wherein the edge of the opening of the cylindrical portion on the side of the second region has a curved shape.
The filter covers the opening of the cylindrical portion on the first region side,
16. The filter support according to claim 15, wherein the outer peripheral surface of the tubular portion and the inner peripheral surface of the megaphone body sandwich the edge of the filter.
The cylindrical portion includes an outer cylindrical portion and an inner cylindrical portion that overlaps the inner side of the outer cylindrical portion,
The filter covers one opening of the inner cylinder,
15. The filter support according to claim 14, wherein the inner peripheral surface of the outer tubular portion and the outer peripheral surface of the inner tubular portion sandwich the edge of the filter.
The filter support according to claim 17, wherein the inner peripheral surface of the inner cylindrical portion is formed with a protruding portion that protrudes from the other opening of the inner cylindrical portion.
The filter support according to claim 17 or 18, wherein the outer cylindrical portion is separated into a region overlapping with the inner cylindrical portion and another region.
The filter support according to any one of claims 13 to 19, wherein a convex portion having a hole is formed on the outer peripheral surface of the cylindrical portion.
a filter support according to any one of claims 13 to 20;
the megaphone main body;
with
The megaphone body has two body openings with different inner diameters,
The megaphone, wherein the cylindrical portion is inserted into one of the two main body openings having a smaller inner diameter.