JP2021170762A - Earpiece - Google Patents

Abstract

To provide an earpiece attached to an earphone, which has an adjustable size by simple processing and can offer an excellent feeling of wear and an excellent quality of sound.SOLUTION: The earpiece includes: a multilayered cylindrical body formed by winding a super-thin nonwoven fabric 2 in the shape of a band; a small-width adhesive layer 3 overlapping with the root side of the cylindrical body in a radial direction; a non-adhesive layer 4 overlapping with the top end side in a radial direction; and a hollow part 5 in the center of the cylindrical body. The non-adhesive layer 4 serves to maintain the processability, the flexibility, the air permeability, and the sound absorption property, for example, which are original properties of the super-thin nonwoven fabric 2. The adhesive layer 3 and the non-adhesive layer 4 are overlapped in a radial direction between the super-thin nonwoven fabric 2 formed in the multilayered cylindrical body so that a sound blocking property and a sound absorption property which bring an excellent sound quality can be obtained.SELECTED DRAWING: Figure 1

Description

The present invention relates to earpieces that are adjustable in size and are optimal for comfortable use with good sound quality.

In canal type earphones used by inserting the earpiece into the ear canal 10, usually, when one earphone is obtained, three or more different sizes of earpieces are obtained so that each user can select an earpiece suitable for the ear canal 10. Is attached (Non-Patent Document 1).

In an inner ear type earphone that is used by inserting the sound output portion of the earphone housing into the concha cavity 11, the size of the insertion portion of the earphone cannot be changed.

The material of the earpiece is silicon rubber or the like, and an umbrella-shaped earpiece 12 having a thin tip side and a thick root side is known so that the ear canal can be easily inserted into the ear canal 10 and the ear canal 10 can be sealed (Patent Document 1). .. Further, in order to give the earpiece flexibility, the thickness of the umbrella-shaped portion is formed as thin as about 1 mm.

An earpiece provided with a sound absorbing material made of silicon foam inside the umbrella-shaped portion of the earpiece is shown (Patent Document 2).

Since the earphone is an article that is used by inserting it into the ear, the constituent parts are small. Further, the earphone has a very narrow acoustic space from the sound source to the eardrum 9 among the voice transmission devices.

With the spread of wireless earphones capable of voice calls, the use of earphones in business is increasing.

Japanese Patent Application Laid-Open No. 2018-182707 Public Relations Japanese Patent Application Laid-Open No. 2014-087054

"Headphone Wireless Model General Catalog Spring 2020", Sony Co., Ltd., p. 4

The issues in the canal type earphone will be described below.

According to the above earpiece, since the material is silicon rubber or the like, it is difficult to adjust the outer diameter size of the umbrella-shaped portion inserted into the ear canal 10 and the inner diameter size of the tubular portion attached to the sound conduit 6. Is. Therefore, if the attached earpieces of different sizes do not fit, the user is trying to use them while feeling uncomfortable or purchasing another earpiece. Therefore, non-conforming earpieces are often discarded.

According to US Pat. It is supposed to be obtained. However, it is not without problems.

For example, since the earpiece used by sealing the ear canal 10 is not breathable, the pressure in the ear feels a change when the earpiece is attached or detached. In addition, by sealing the ear canal 10, moisture in the ear cannot be removed, which may have an adverse effect on the health of the ear.

Further, the sound output from the diaphragm 7 to the ear canal 10 is diffused into the ear canal 10 by the diffusion action due to the outer surface shape of the earpiece umbrella-shaped portion. Therefore, the sound quality is likely to deteriorate due to the generation of reflected waves.

Further, sound leakage to the outside and external sound are increased due to the low sound insulation due to the thinness of the earpiece umbrella-shaped portion and the sound collecting action due to the inner surface shape of the earpiece umbrella-shaped portion.

Further, in order to obtain good sound quality, it is said that it is good to push the earpiece into the back of the ear canal 10 to seal the ear canal 10. However, in this method, since the acoustic space from the diaphragm 7 to the eardrum 9 which is a sound source is narrowed, resonance of sound and generation of standing waves which cause deterioration of sound quality are likely to occur.

Further, bringing the diaphragm 7 which is a sound source closer to the center of the head makes it difficult to obtain a wide sound image localization which is an ideal performance in a stereo earphone. Furthermore, the act of pushing the earpiece toward the center of the head itself may cause physical stress.

According to Patent Document 2, a sound absorbing material made of silicon foam is provided inside the umbrella-shaped portion on the outside air contact side of the earpiece in order to block external sound. If this is compared to another sound transmission device, a sound absorbing material is provided on the outer wall of a box-shaped speaker or an acoustic room. However, in reality, the sound absorbing material is provided inside the box-shaped speaker or the sound chamber.

Therefore, it is presumed that the listening quality can be improved by providing the sound absorbing material on the inner side of the ear canal 10 rather than providing the sound absorbing material on the outside air contact side of the earpiece shown in Patent Document 2.

The issues in the earbud earphones will be described below.

Since the inner ear type earphone does not seal the ear canal 10, the problem like the canal type earphone described above is unlikely to occur, so that the ear canal type earphone can be used comfortably. However, it is not without problems.

For example, since the size of the insertion portion into the ear canal 11 cannot be changed in the inner ear type earphone, the airtightness with the ear canal 11 is low, the sound leakage to the outside is large, and the external sound can easily enter the ear canal 10. .. Therefore, there is a problem that the power of sound is lacking.

Regardless of whether the earphone is a canal type or an inner ear type, the earphone is an article that is used by being inserted into the ear, so it is necessary to reduce the size of the constituent parts. Therefore, the output sound tends to be weaker in the low range and excessively strong in the high range as compared with the actual sound.

When using earphones for business purposes, you will be forced to use the earphones for a long time. Therefore, there is a demand for earpieces that have a comfortable feel.

An object of the present invention is to provide an earpiece that can be adjusted in size by simple processing, has good sound quality, and can be used comfortably. An object of the present invention is to provide an earpiece that can be brought close to the actual sound by a particularly simple structure.

In the earpiece according to the present invention, the adhesive layer 3 is provided narrowly along one side of the strip-shaped ultrafine fibrous nonwoven fabric 2 in the longitudinal direction of at least one surface, which is the root side of the earpiece, and the remaining tip side. A multi-layered cylindrical body formed by winding and adhering a strip-shaped body 1 provided with a non-adhesive layer 4 on the surface, and a pressure-sensitive adhesive layer 3 layered radially on the root side of the cylindrical body. The non-adhesive layer 4 layered in the radial direction is provided on the remaining tip side, and the hollow portion 5 is provided at the center of the cylindrical body.

In the present invention, since the ultrafine fibrous nonwoven fabric 2 having good processability is used as the main material, the size of the earpiece can be adjusted by simple processing. Therefore, since it is not necessary to prepare earpieces of different sizes, it is possible to reduce the number of earpieces that are not suitable for the user and are discarded.

Further, since the non-adhesive layer 4 maintains the flexibility, breathability, moisture permeability and the like which are the original properties of the ultrafine fiber non-woven fabric 2, it can be used with a comfortable wearing feeling.

Further, by winding and adhering the strip-shaped body 1 to form a multi-layered cylindrical body, the sound absorption and sound insulation properties of the ultrafine fibrous nonwoven fabric 2 are increased, and the sound insulation property is acquired by the adhesive layer 3. Good sound quality can be obtained.

It is a perspective view of the earpiece which concerns on this invention. It is a top view of the strip 1 which concerns on this invention. FIG. 5 is a cross-sectional view which is a first embodiment of the present invention and is a cross-sectional view for replicating a usage state in which an earpiece is inserted into the ear canal 10. It is a second embodiment of the present invention, and is the cross-sectional view which illustrates the use state by inserting the earpiece into the concha cavity 11. It is a 3rd Example of the present invention, and is the cross-sectional view which illustrates the use state which inserted the ear piece into the concha cavity 11. FIG. 5 is a cross-sectional view for replicating a usage state in which the umbrella-shaped earpiece 12 is inserted into the ear canal 10.

In FIGS. 3 to 6, the internal configuration of the earphone body 8 is shown by extracting only the diaphragm 7 necessary for the description of the present invention.

The embodiments for carrying out the present invention will become clear when the following description of preferred embodiments is read in light of the drawings. However, the drawings are for illustration purposes only and do not limit the scope of the present invention.

First Example

FIG. 2 shows that the adhesive layer 3 is provided in a narrow width along one side of the strip-shaped ultrafine fibrous nonwoven fabric 2 in the longitudinal direction of at least one surface, which is the root side of the earpiece, and is non-adhesive on the remaining tip side. It is a strip-shaped body 1 provided with the agent layer 4. The strip-shaped body 1 is wound around a winding core and adhered to the winding core to form a multi-layered cylindrical body.

As a result, the adhesive layer 3 layered in the radial direction is provided on the root side of the cylindrical body shown in FIGS. 1 and 3, and the non-adhesive layer 4 layered in the radial direction is provided on the remaining tip side. An earpiece having a hollow portion 5 is formed at the center of the cylindrical body.

Since the length of the earpiece is usually about 10 mm, the width of the adhesive layer 3 is preferably set to 5 mm or less in order to provide the non-adhesive layer 4.

The material of the ultrafine fiber non-woven fabric 2 has a raised surface like artificial suede, has an appropriately dense layer inside, and is given the flexibility of suede texture. Toray Industries, Inc.'s Ultra It is preferable to use suede (trade name).

Hereinafter, the size adjustment of the earpiece in the first embodiment will be described.

The size of the earpiece can be adjusted even in the state of the band-shaped body 1, and also in the state of the finished earpiece made by winding and adhering the band-shaped body 1.

For example, to reduce the outer diameter size of the earpiece, it can be realized by cutting the strip 1 in the lateral direction with scissors or the like, and to increase the outer diameter size, a new strip 1 is added to the strip 1. This can be achieved by adding and co-winding. The length adjustment of the earpiece is limited to the shortening direction, but can be realized by cutting the strip-shaped body 1 in the longitudinal direction with scissors or the like.

The reason why the above-mentioned size adjustment of the earpiece can be easily performed even in the state of the finished earpiece is that the non-adhesive layer 4 on the tip side of the earpiece makes it easy to cut, stick, and fray, for example. This is because the good processability, which is the original property, is maintained. Further, since the pressure-sensitive adhesive layer 3 on the root side of the earpiece is narrow, the work of unwinding the earpiece while peeling the pressure-sensitive adhesive layer 3 from the ultrafine fiber non-woven fabric 2 can be performed with a weak force.

In the above-mentioned peeling of the pressure-sensitive adhesive layer 3 from the ultra-fine fiber non-woven fabric 2, since the pressure-sensitive adhesive layer 3 does not penetrate into the inside of the ultra-fine fiber non-woven fabric 2, very few fibers on the surface of the ultra-fine fiber non-woven fabric 2 are the pressure-sensitive adhesive layer. Limited to transition to 3.

Therefore, even if the adhesive layer 3 is peeled from the ultrafine fiber non-woven fabric 2 and the earpiece is unwound to form the strip-shaped body 1, the peeled surface of the ultrafine fiber non-woven fabric 2 of the strip-shaped body 1 is hardly damaged. Therefore, it may be necessary to provide a new pressure-sensitive adhesive layer 3 by winding the strip-shaped body 1 again and adhering it to form an earpiece, but it is possible.

It is preferable that the length of the initial size of the strip 1 is set to the assumed maximum value so that the size of the outer diameter of the earpiece can be adjusted without preparing a new strip 1.

In order to fit the earpiece of the first embodiment to the outer diameter size of the sound conduit 6, it is done by the following method. For example, in order to make it compatible with the sound conduit 6 having an outer diameter of 5 mm, it can be realized by winding the band-shaped body 1 around a winding core having a diameter of 5 mm and adhering it to form a multi-layered cylindrical body.

Further, in order to adapt the earpiece to any outer diameter size of the sound conduit 6, it can be realized by directly winding the band 1 around the sound conduit 6 and adhering it to form a multi-layered cylindrical body.

As described above, the work of winding and adhering the strip 1 to form the earpiece and the size adjustment processing of the earpiece can be easily performed by the user himself / herself. Therefore, the user may obtain the finished earpiece, but the present invention can also be carried out by obtaining the strip 1. In that case, since the earpiece manufacturing cost can be reduced, it can be provided at a low cost.

When the above-mentioned user obtains the strip 1, it is desirable that the pressure-sensitive adhesive layer 3 is provided to the user in a state of being covered with a release paper. In that case, the material of the pressure-sensitive adhesive layer 3 is, for example, Nitoms Co., Ltd.'s double-sided tape No. It is preferable to use 5000NS.

Hereinafter, the usage state and the like in the first embodiment of the present invention will be described with reference to FIG.

For example, the width of the strip 1 is 10 mm, the thickness of the ultrafine fiber non-woven fabric 2 is 0.5 mm, and the thickness of the pressure-sensitive adhesive layer 3 is 0.25 mm. As a result, an earpiece having a length of 10 mm and an outer diameter of 11 mm is formed.

After attaching the adhesive layer 3 side of the earpiece to the sound conduit 6 of the earphone, the earpiece is inserted into the user's ear canal 10 to listen to the sound.

In FIG. 3, the band-shaped body 1 is wound and adhered with the adhesive layer 3 inside, but if smooth attachment / detachment of the earpiece to the sound conduit 6 is desired, the adhesive layer 3 is placed outside. The strip-shaped body 1 may be wound and adhered.

If the direction of the fluff on the side wall of the earpiece is formed so as to flow from the tip end side to the root side of the earpiece, it helps prevent misalignment after inserting the earpiece into the ear canal 10 and prevent the earpiece from falling off.

Both the ultrafine fiber non-woven fabric 2 and the adhesive layer 3, which are the materials on the root side of the earpiece, have appropriate elasticity and elasticity. By layering these materials in the radial direction, the necessary and sufficient elasticity and elasticity for the earpiece to be movable with the sound conduit 6 as a fulcrum are obtained. Therefore, the earpiece of the first embodiment can be brought into close contact with the bending of the ear canal 10 in the length direction.

Further, since the tip end side of the earpiece is the non-adhesive layer 4, the flexibility and plasticity that are the original properties of the ultrafine fibrous nonwoven fabric 2 are maintained. As a result, the tip side of the earpiece can be brought into close contact with the ear canal in response to a change in shape in the radial direction of the ear canal, and the force to return the changed shape is weak, so that the pressure on the wall around the ear canal 10 is small.

Since the tip end side of the earpiece is the non-adhesive layer 4, the breathability and moisture permeability that are the original properties of the ultrafine fiber non-woven fabric 2 are maintained. As a result, when the earpiece is attached or detached, air freely enters and exits the ear canal 10, so that the air pressure in the ear does not change. In addition, excessive sound pressure due to the low frequency range can be released to the outside. Furthermore, since the moisture in the ear can be released to the outside, a comfortable wearing feeling can be obtained even when used for a long time.

Hereinafter, the sound quality in the first embodiment will be mainly described.

The earphone usually has a very narrow acoustic space from the sound source to the eardrum 9 among the voice transmission devices. However, the acoustic phenomenon in the acoustic space is common to other voice transmission devices.

For example, in order to obtain good sound quality from an audio device such as a box-shaped speaker or an acoustic room, it is important to insulate the sound between the acoustic space and the outside and to absorb the sound that has lost its escape in the sound-insulated acoustic space. Is known. Therefore, the sound insulation and sound absorption are important elements for obtaining good sound quality even in earphones.

Since the ultrafine fiber non-woven fabric 2 which is the main material of the earpiece of the first embodiment has breathability, the ear canal 10 is not completely sealed. Therefore, pushing the earpiece of the first embodiment into the ear canal 10 does not improve the sound quality as in the umbrella-shaped earpiece 12.

Nevertheless, the reason why the earpiece of the first embodiment can obtain good sound quality is that the wall thickness of the cylindrical body is increased because the ultrafine fiber non-woven fabric 2 is wound and adhered to form a multi-layered cylindrical body. This is to obtain sound insulation by increasing the number. Further, the adhesive layer 3 layered in the radial direction on the root side of the earpiece is in the form of covering the ear canal as if it were to obtain sound insulation.

Due to the sound insulation effect of the above two forms, the sound output from the diaphragm 7 can reach the eardrum 9 while maintaining a sufficient volume without pushing the earpiece.

It is known that the ultrafine fiber non-woven fabric 2 has a sound absorbing property and has a property of absorbing a high frequency range rather than a low frequency range. It is also known that thickening the sound absorbing material and providing an air layer behind the sound absorbing material are effective as methods for enhancing the sound absorbing effect.

In the first embodiment, it has two forms for enhancing the sound absorbing effect. First, winding and adhering the strip 1 increases the thickness of the sound-absorbing ultrafine fibrous nonwoven fabric 2.

Second, since the tip side of the earpiece is the non-adhesive layer 4, the thickness of the pressure-sensitive adhesive layer 3 and the fluff on the surface of the ultrafine fiber non-woven fabric 2 cause an air layer to be formed between the adjacent ultrafine fiber non-woven fabrics 2 on the tip side of the earpiece. Since the air layer is formed and the air layer is layered in the radial direction, the maximum sound absorption effect can be expected.

The sound absorption effect described above can reduce the reflection of sound in the ear canal 10. Further, since the sound coming toward the earpiece in the direction opposite to the eardrum 9 is also absorbed, the sound leakage to the outside can be reduced and reduced. Furthermore, external sound can be reduced because it is absorbed when passing through the earpiece.

The reduction of sound leakage and the reduction of external sound are also achieved by the above-mentioned sound insulation effect.

The problem with the sound quality of conventional earphones is that the bass range is weaker than the actual sound, and the treble range tends to be excessively strong. The earpiece of the first embodiment can be brought closer to the actual sound by strengthening the bass range by the above-mentioned sound insulation effect and weakening the treble range by the above-mentioned sound absorption effect.

In the first embodiment, the sound quality can be changed by shortening the length of the earpiece with scissors or the like. This is the same principle as a wind instrument, and the shorter it is, the stronger the treble range becomes and the weaker the bass range becomes. As a result, the sound quality set by the manufacturer is limited to the direction of shortening the length of the earpiece, but the user can change it to his / her own preference.

In the above sound quality changing method, the sound quality can be changed only in the direction of shortening the length of the earpiece, so it is necessary to set the length of the initial size of the earpiece to be longer. However, as the length of the earpiece is increased, the volume reaching the eardrum 9 becomes smaller, and the earpiece is more likely to come off from the ear canal.

Considering them, the initial size of the earpiece is preferably set to about 20 mm in length. (In FIG. 3 showing the usage state of the first embodiment, the length of the earpiece is set to 10 mm in order to explain the comparison with the umbrella-shaped earpiece 12 shown in FIG. 6).

By changing the sound quality by processing the earpiece described above, it is convenient for the user to be able to change the sound quality of the earphone set by the manufacturer to a preferred sound quality that differs depending on the genre such as music, listening learning, and voice call. Also, for earphones that are often used in highly entertaining genres, it is fun to be able to easily change the sound quality according to the user's preference, which is an important factor.

FIG. 3 shows the usage state of the first embodiment, and for comparison with this, the same usage state of the umbrella-shaped earpiece 12 is shown in FIG. It is clear that the acoustic space from the diaphragm 7 to the eardrum 9 in FIGS. 3 and 6 is wider in the first embodiment of FIG.

This is because in the first embodiment, air is held between the fibers inside the ultrafine fiber non-woven fabric 2, and the above-mentioned air layer exists between the adjacent ultrafine fiber non-woven fabrics 2 on the tip side of the earpiece. Is. Therefore, the earpiece of the first embodiment also improves the listening quality by widening the acoustic space.

Second Example

Hereinafter, a second embodiment of the earpiece according to the present invention will be described with reference to FIG.

In the second embodiment, the outer diameter size of the earpiece of the first embodiment is increased so that the earpiece can be inserted and held in the concha cavity 11. As a result, the canal type earphone can be changed to the inner ear type earphone without changing the earphone body 8.

In the second embodiment, for example, the width of the strip 1 is 10 mm, the thickness of the ultrafine fiber non-woven fabric 2 is 0.5 mm, the thickness of the pressure-sensitive adhesive layer 3 is 0.25 mm, and the strip 1 is placed on a winding core having a diameter of 5 mm. By winding 7 times, an earpiece having a length of 10 mm and an outer diameter of 15.5 mm is formed.

After attaching the adhesive layer 3 side of the earpiece to the sound conduit 6 of the earphone, the earpiece is inserted into the concha cavity 11 of the user to listen to the sound.

For example, the earpiece of the second embodiment may be obtained by adding a new strip-shaped body 1 to the outer periphery of the earpiece of the first embodiment, winding it, and adhering it. In that case, since the earpiece of the second embodiment is removable from the earpiece of the first embodiment, the insertion location of the earpiece into the ear can be easily changed, and the convenience is improved.

The comparison of the second embodiment with that of the first embodiment is as follows.

In the second embodiment, as in the first embodiment, the size of the earpiece can be easily adjusted, so that the low airtightness with the concha cavity 11, which is a problem of the inner ear type earphone, can be improved. ..

In the second embodiment, the wall thickness of the earpiece, which is a cylindrical body, becomes thicker as the number of times the strip-shaped body 1 is wound increases, so that the sound insulation effect is increased. Further, since the pressure-sensitive adhesive layer 3 layered on the root side of the earpiece becomes larger in the radial direction, the sound insulation effect due to the action of the lid described above is also increased.

Therefore, in the second embodiment, although the distance from the diaphragm 7 to the eardrum 9 is increased, the sound insulation effect can suppress the attenuation of the volume output from the diaphragm 7, so that a sufficient volume can be obtained. It can reach the eardrum 9.

Further, since the amount of the ultrafine fibrous nonwoven fabric 2 used increases, a sufficient sound absorbing effect can be obtained. Further, since the base side of the earpiece described above moves with the sound conduit 6 as a fulcrum, the tip surface and the side wall of the earpiece having a large area are flexibly deformed and adhered along the inner surface shape of the ear condyle cavity 11. Therefore, a powerful and good sound can be obtained.

Since the area of the earpiece that comes into contact with the ear increases, the good touch feeling of the ultrafine fiber non-woven fabric 2 is an important component.

In the second embodiment, the acoustic space from the diaphragm 7 to the eardrum 9 becomes wider and the distance becomes longer. Therefore, it is possible to obtain a wide sound image localization, which is an ideal performance in a stereo earphone, with good sound quality.

It is possible to change to the earpiece of the first embodiment by unwinding the earpiece of the second embodiment and reducing the outer diameter size.

In the second embodiment, the sound quality can be changed by shortening the length of the earpiece described in the first embodiment.

Third Example

Hereinafter, a third embodiment of the earpiece according to the present invention will be described with reference to FIG.

In the third embodiment, the inner diameter size of the earpiece hollow portion 5 of the second embodiment is increased so that the umbrella-shaped earpiece 12 can be mounted and held in the hollow portion 5. From this, it is possible to change from the canal type earphone to the inner ear type earphone only by attaching the earpiece of the third embodiment without removing the umbrella-shaped earpiece 12 from the sound conduit 6.

Contrary to the above, the change from the inner ear type earphone to the canal type earphone can be easily performed because the earpiece of the third embodiment is detachable from the umbrella-shaped earpiece 12.

When the material of the umbrella-shaped earpiece 12 is silicon rubber, necessary and sufficient friction acts on the contact surface with the ultrafine fiber non-woven fabric 2 which is the material of the third embodiment earpiece. Therefore, the umbrella-shaped earpiece 12 does not easily come off from the earpiece of the third embodiment.

In the sound quality change by shortening the length of the earpiece described in the first embodiment, the sound quality can be changed only in the direction of shortening the length from the diaphragm 7 to the tip of the earpiece.

However, in the third embodiment, the umbrella-shaped earpiece 12 can be slidably displaced in the hollow portion 5 of the earpiece in the length direction. That is, the sound quality can be easily adjusted in the direction of shortening and the direction of lengthening the length from the diaphragm 7 to the tip of the earpiece. (For the purpose of explaining the slalide displacement, the length of the earpiece of the third embodiment shown in FIG. 5 is set to 15 mm.)

In the sound quality adjusting method of the third embodiment, the length of the earpiece itself does not change. Therefore, the change in sound quality in the third embodiment is small as compared with the change in sound quality by the sound quality changing method described in the first embodiment.

If it is desired to adjust the sound quality by the slide displacement described above while maintaining the sound quality of the second embodiment, the earpiece of the first embodiment is attached to the hollow portion 5 of the earpiece of the third embodiment to form the second embodiment. It is possible to adjust the sound quality by sliding displacement while maintaining the sound insulation and sound absorption of.

The comparison of the sound quality of the third embodiment with that of the second embodiment is as follows.

In the third embodiment, the sound insulation is reduced due to the thinness of the umbrella-shaped earpiece 12. umbrella-shaped portion. Further, the sound insulation and the sound absorption are reduced by reducing the number of times the ultrafine fiber non-woven fabric 2 is wound.

However, since the inner wall of the hollow portion 5 of the earpiece is supported by the umbrella-shaped earpiece 12, the inner wall of the hollow portion 5 does not collapse during listening and obstruct the passage of sound. Therefore, the sound output from the diaphragm 7 can reach the eardrum 9 while maintaining a sufficient volume.

If the tip end side of the umbrella-shaped earpiece 12 is attached to the sound conduit 6 (not shown), the sound output from the diaphragm 7 is directional to the eardrum 9 due to the sound collecting action due to the inner surface shape of the umbrella-shaped earpiece 12. You can get a powerful sound because it has. However, in reality, since the shape of the umbrella-shaped earpiece 12 is widened on the ear canal 10 side, there is a risk that the peripheral wall of the ear canal 10 may feel uncomfortable or be damaged.

However, by attaching the earpiece of the third embodiment to the umbrella-shaped earpiece 12, the earpiece can be inserted into the concha cavity 11 and a powerful sound can be obtained with a comfortable feeling of use.

It is a major feature of the inner ear type earphone that there is no physical stress due to inserting the earpiece into the ear canal 10. Therefore, it is significant that the earpieces of the second embodiment and the third embodiment can be used as an inner ear type earphone without changing the canal type earphone body 8.

Fourth Example

In the fourth embodiment (not shown), the earpiece of the first embodiment or the second embodiment is not attached to the sound conduit 6 of the earphone, but the earpiece alone is inserted into the ear and used as a sound wave attenuator. be.

Depending on the purpose of use of the sound wave attenuator, a high sound insulation effect is not desired, and it is necessary to capture some external sound. In addition, the amount of external sound taken in by the sound wave attenuator may differ depending on the purpose of use.

For example, a music performance venue having a risk of deafness is required to take in a small amount of external sound, and a manufacturing facility having a risk of gas leakage is required to take in a large amount of external sound.

Since the earpiece of the fourth embodiment receives external sound from the hollow portion 5, it is possible to provide a sound wave attenuator having a function of capturing external sound without changing the configuration of the present invention. Moreover, since the earpiece of the fourth embodiment can set the inner diameter size of the hollow portion 5 as described in the first embodiment, the amount of external sound taken in can be set.

In the fourth embodiment, when high sound insulation as a sound wave attenuator is desired, the sound insulation can be enhanced by closing the hollow portion 5 with a resin or the like or attaching a string for preventing falling off. .. Therefore, it can be provided as a sound wave attenuator having high sound insulation without significantly changing the configuration of the present invention.

Although the embodiments of the present invention have been described above, other embodiments can be considered. For example:

If the width of the strip 1 is shortened toward the upstream end in the winding direction and the side of the non-adhesive layer 4 is shortened, the hollow portion 5 of the earpiece formed into a cylindrical body by winding and adhering the strip 1 The inner surface has a substantially tapered shape. Therefore, the sound output from the diaphragm 7 has a direction toward the eardrum 9 due to the sound collecting action due to the substantially tapered shape, so that a powerful sound can be obtained.

Further, the substantially tapered shape increases the flexibility of the tip end side of the earpiece, so that the earpiece can be easily inserted into the ear and the degree of close contact with the ear can be improved.

Most of the colors of conventional earpieces are black. Since earpieces are items that are worn and used, high fashionability is required. The ultrafine fibrous nonwoven fabric 2, which is the main material of the earpiece of the present invention, can be developed in various colors without changing its characteristics. Therefore, it is possible not only to enhance the fashionability, but also to distinguish the left and right earphones, the earpieces according to the sound quality, and the like by color.

Since the earpiece of the present invention can be attached to a voice transmission device having a sound conduit 6, it can be used in various industrial fields such as hearing aids and stethoscopes.

1 Belt-shaped body 2 Extra-fine fiber non-woven fabric 3 Adhesive layer 4 Non-adhesive layer 5 Hollow part 6 Sound conduit 7 Diaphragm 8 Earphone body 9 Eardrum 10 Ear canal 11 Ear concha cavity 12 Umbrella-shaped earpiece

Claims (7)

It is an earpiece that is attached to earphones and is used.
The earpiece is provided with an adhesive layer (3) in a narrow width along one side that is the root side of the earpiece in the longitudinal direction of at least one surface of the strip-shaped ultrafine fibrous nonwoven fabric (2), and the remaining tip side. It is a multi-layered cylindrical body formed by winding and adhering a strip-shaped body (1) provided with a non-adhesive layer (4) on the surface.
The base side of the cylinder has a pressure-sensitive adhesive layer (3) layered in the radial direction, and the remaining tip side has a non-adhesive layer (4) layered in the radial direction. An earpiece characterized by having a hollow portion (5) in the center. An umbrella-shaped earpiece (12) can be attached to the hollow portion (5) of the cylindrical body.
The earpiece according to claim 1, wherein the cylindrical body can be inserted and held in the concha space (11). The earpiece according to claim 1 or 2, wherein the material of the ultrafine fiber non-woven fabric (2) is artificial suede. The strip (1) according to claim 1 or 2, for forming an earpiece. The strip-shaped body (1) according to claim 4, wherein the material of the ultrafine fiber non-woven fabric (2) is artificial suede. The strip-shaped body (1) according to claim 4 or 5, wherein the pressure-sensitive adhesive layer (3) is coated with a release paper. The earpiece according to claim 1, which is intended to be used as a sound wave attenuator.

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