阅读说明：本技术 听筒 (Telephone receiver ) 是由 三添慎也 于 2019-04-15 设计创作，主要内容包括：提供一种能够以对应于耳孔而柔软地变形的方式佩戴并且容易制造的听筒。在听筒10a中,具有听筒主体12,通过向所述听筒主体12封入填充材料15而构成听筒10a,所述听筒主体12具有：容器状基体13,由橡胶状弹性膜构成,形成为容器状,具有一个开口部13a,以及盖体14,将所述开口部13a液密地密封；所述填充材料15在常温下能够变形流动。(Provided is an earpiece which can be worn in a flexibly deformable manner in accordance with an ear hole and which is easy to manufacture. The handset 10a includes a handset body 12, and the handset 10a is configured by enclosing a filler 15 in the handset body 12, and the handset body 12 includes: a container-shaped base 13 made of a rubber-like elastic film, formed in a container shape, having one opening 13a, and a lid 14 for liquid-tightly sealing the opening 13 a; the filler material 15 is deformable and flowable at normal temperature.)

1. A handset having a handset body configured by enclosing a filler in the handset body, characterized in that,

the earpiece body has:

a container-like base body formed of a rubber-like elastic film, formed in a container shape, having an opening, an

A lid body that liquid-tightly seals the opening portion;

the filling material is capable of deforming and flowing at normal temperature.

2. The earpiece of claim 1,

the container-shaped base body is in a hollow ring shape,

the cover body is in the shape of an annular plate.

3. The earpiece of claim 2,

the handset main body has a hard tube portion in an inner peripheral portion of the container-shaped main body or the lid body.

4. The handset according to any one of claims 1 to 3,

the filling material is at least one of liquid, viscous fluid and gel of at least one of paraffin, flowing paraffin, silicone oil, silicone grease, silicone gel and polyurethane gel.

5. The earpiece according to any one of claims 1 to 4,

the rubber-like elastic membrane is at least one selected from the group consisting of silicone rubber, butyl rubber and urethane rubber having A JIS-A hardness of 5 to 30.

6. The earpiece according to any one of claims 1 to 5,

the thickness of the rubber-like elastic film of the container-like base body gradually increases from below the opening to the opening, and the container-like base body has a bonded end portion whose width increases at the opening.

7. The earpiece according to any one of claims 1 to 6,

the handset body has a storage portion for the filler inside the container-shaped base body sealed by the lid,

the filling material is filled in the housing part at 50-100 vol% relative to the housing part.

8. The earpiece according to any one of claims 1 to 7,

the rubber-like elastic membrane has a permeation-preventing film on the inner surface or the outer surface thereof, and the permeation-preventing film has low permeability to the filler or air.

9. The earpiece according to any one of claims 1 to 8,

the container-like base body has:

a front end portion on the insertion auricle side, an

And a bulging portion bulging outward in the radial direction with respect to the distal end portion.

10. The earpiece according to any one of claims 1 to 9,

in the container-like base, a pinna insertion-side end portion into which a pinna is inserted is curved.

11. The earpiece according to any one of claims 1 to 10,

the container-shaped base has a grip portion protruding from the lid body.

Technical Field

The present invention relates to an earpiece (earpiece) constituting a part of an ear canal of an earphone (earpiece), an earplug, a hearing aid, or the like.

Background

Earpieces are members that are inserted into ear holes of a wearer, and various types of earpieces are known. For example, the technique described in japanese patent application laid-open No. 2004-208865 (patent document 1) is an invention for the purpose of providing an earplug which is easy to remove and excellent in sound insulation and waterproof effects, and the body made of a material having plasticity is entirely covered with a plastic film. Further, the technology described in japanese utility model registration No. 3096024 (patent document 2) is directed to providing a stethoscope earpiece that has flexibility, is easily shaped to conform to an ear, and has a good wearing feeling, and the stethoscope earpiece has a soft touch feeling due to the liquid or air injected into the peripheral wall of the ear insertion portion.

Disclosure of Invention

Problems to be solved by the invention

However, in the technique described in japanese patent laid-open No. 2004-208865 (patent document 1), a plastic film is used as the outer skin. Generally, plastic films are not deformed by elongation although they have flexibility. Therefore, it is difficult to deform the plastic film so as to closely adhere to the inner surface of the ear hole. In addition, in the technique described in japanese utility model registration No. 3096024 (patent document 2), it is difficult to form a hollow portion having a hollow shape inside a portion to be inserted into an ear. Further, it is difficult to inject liquid into the cavity.

The present invention is based on the prior art as described above. An object of the present invention is to provide an earpiece that can be worn in a flexibly deformable manner in accordance with an ear hole. Another object of the present invention is to provide a handset that is easy to manufacture.

Means for solving the problems

In order to achieve the above object, the handset of the present invention is constructed as follows. That is, a handset according to the present invention includes a handset body configured by sealing a filler in the handset body, and the handset body includes: a container-shaped base body formed of a rubber-like elastic film, formed in a container shape, having an opening, and a lid body that liquid-tightly seals the opening; the filling material is capable of deforming and flowing at normal temperature.

The earpiece body has: the container-shaped base is formed of a rubber-like elastic film, has an opening, and is formed in a container shape, and a lid body that liquid-tightly seals the opening. Therefore, the earpiece main body can be easily manufactured by bonding the container-shaped base and the lid. The container-like base is formed of a rubber-like elastic film, and the filling material sealed in the handset body is deformable and flowable at room temperature. Therefore, the ear cup can be flexibly deformed along the shape of the ear hole and worn in the ear.

The container-shaped base may have a hollow annular shape, and the lid may have an annular plate shape. Since the container-shaped base is hollow and annular, a handset having a through hole as a sound hole in the center portion can be obtained. Therefore, the earphone can be used suitably as a headphone. Further, since the handset main body has a structure in which the lid body having an annular plate shape is provided on the hollow annular container-shaped base body, a simple structure composed of at least two members can be provided.

The handset main body may have a hard tube portion in an inner peripheral portion of the container-shaped base or the cover. Since the container-shaped base or the lid has the hard cylindrical portion in the inner peripheral portion thereof, the shape of the passage through which sound is transmitted can be kept constant.

The filler may be at least one selected from a liquid, viscous fluid, and gel of at least one selected from paraffin, fluid paraffin, silicone oil, silicone grease, silicone gel, and urethane gel. According to the filler, since it is harmless to the human body even if it is leached out, it does not cause harm. The filling material is deformable and flowable at room temperature, can be deformed freely in conformity with the shape of the ear hole, and can follow the inner surface of the ear hole to bring the container-like base body into close contact with the ear.

The rubber-like elastic membrane may be formed of at least one member selected from the group consisting of silicone rubber, butyl rubber, and urethane rubber having A JIS-A hardness of 5 to 30. According to such a rubber-like elastic membrane, the container-like base can be brought into close contact with the inner surface of the ear hole while following deformation along the inner surface of the ear hole.

The thickness of the rubber-like elastic film of the container-like base body may gradually increase from below the opening to the opening, and the container-like base body may have a bonding end portion whose width is increased at the opening. Since the width of the adhesive end portion is large, the adhesive area with the lid body can be increased, and the adhesive force between the lid body and the container-like base body can be increased. Therefore, the filled filler is less likely to leak to the outside.

The receiver body may have a housing portion for the filler inside the container-shaped base body sealed by the cover, and the filler may be filled in the housing portion at 50 to 100 vol% with respect to the housing portion. According to the present invention, the rubber-like elastic film of the container-like base and the flexibility of the filler can be properly balanced, and the headphone can be provided in close contact with the ear and having a good wearing feeling.

The rubber-like elastic membrane may have a penetration preventing film having low permeability to the filler or air on an inner surface or an outer surface thereof. The rubber-like elastic membrane has a permeation-preventing film, and can prevent the filler from leaking to the outside and prevent air from penetrating through the handset body.

The container-shaped base may include: the ear tip portion includes a tip portion located on a side where the auricle is inserted, and a bulging portion bulging outward in a radial direction with respect to the tip portion. Thus, the tip portion on the insertion side of the auricle is thinner than the bulging portion, and therefore, the tip portion can be disposed in the ear so as to be separated from the wall of the ear, the wearing feeling when inserted into the ear can be reduced, and the tip portion can be inserted into the deep part of the ear. Further, since the bulging portion is thicker than the distal end portion, the earpiece can be reliably brought into contact with the inner surface of the auricle at the bulging portion. Further, when the receiver is inserted into the auricle, the expanded portion having a large outer shape can be stably held by the fingers, and thus the receiver can be easily worn on the auricle.

In the container-shaped base, an auricle insertion-side end portion into which an auricle is inserted may be formed in a curved shape. Since the insertion-side end of the auricle is curved, it is easily guided and inserted into the auricle. In the present invention, in which the container-shaped base has a hollow ring shape, the auricle-insertion-side end portion may have an outer-peripheral-side bent portion located on an outer peripheral wall side of the container-shaped base and an inner-peripheral-side bent portion located on an inner peripheral wall side of the container-shaped base. Thus, the insertion guide can guide the insertion of the auricle without having the outer peripheral-side bent portion and the corner portion, and the auricle is not irritated by the corner portion at the time of insertion. Further, since the hollow annular container-shaped base has the inner peripheral bent portion, the end portion of the through hole in the center is enlarged in a trumpet shape, and therefore, the sound passing through the through hole can be diffused and output through the inner peripheral bent portion.

The container-shaped base may be configured to have a grip portion protruding from the lid body. Thus, for example, when the handset is taken out from the auricle, the handset can be easily pulled out by pinching the grip portion. Further, when the receiver is taken out from the auricle, the user can hold the holding portion which is not inserted into the auricle and is located outside the auricle, and therefore, from the viewpoint of hygiene, even a person who has a feeling of interference with holding the portion inserted into the auricle can hold the holding portion without interference, which is convenient.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the earpiece of the present invention, it can be worn in a manner flexibly deformed in accordance with the ear hole. In addition, according to the handset of the present invention, it can be easily manufactured.

Drawings

Fig. 1 is a handset according to a first embodiment of the present invention, and 1A in fig. 1 is a bottom view, and 1B in fig. 1 is a front view.

FIG. 2 is a sectional view taken along line II-II of FIG. 1A.

Fig. 3 is an explanatory diagram illustrating a method of manufacturing the handset of fig. 1.

Fig. 4 is a sectional view of a handset according to a first modification of the present invention, which corresponds to fig. 3.

Fig. 5 is a sectional view of a handset according to a second modification of the present invention, which corresponds to fig. 3.

Fig. 6 is a cross-sectional view of an earpiece according to a second embodiment of the invention, comparable to fig. 3.

Fig. 7 is a sectional view of a handset according to a third modification of the present invention, which corresponds to fig. 3.

Fig. 8 is a sectional view of a handset according to a fourth modification of the present invention, which corresponds to fig. 3.

Fig. 9 is a sectional view of a handset according to a fifth modification of the present invention, which corresponds to fig. 3.

Fig. 10 is a cross-sectional view of an earpiece according to a third embodiment of the invention, comparable to fig. 3.

Fig. 11 is a cross-sectional view of a handset according to a fourth embodiment of the invention, corresponding to fig. 3.

Fig. 12 is a sectional view of a handset according to a sixth modification of the present invention, which corresponds to fig. 3.

Fig. 13 is a cross-sectional view of a handset according to a fifth embodiment of the invention, corresponding to fig. 3.

Fig. 14 is a sectional view of a handset according to a seventh modification of the present invention, which corresponds to fig. 3.

Detailed Description

The present invention will be described in further detail below with reference to embodiments. In each embodiment, the same material, composition, production method, action, effect, and the like will not be described repeatedly.

< first embodiment (FIGS. 1 to 3) >: the handset 10a is formed of a handset main body 12, a filler 15, and a hard tube portion 16, the handset main body 12 is constituted of a container-shaped base 13 and a lid 14, the filler 15 is sealed in the handset main body 12, and the hard tube portion 16 is provided on an inner peripheral wall 13b constituting an "inner peripheral portion" of the container-shaped base 13.

The container-like base 13 is formed of a hollow container-like rubber-like elastic film having an opening 13 a. The earpiece main body 12 is formed by attaching an annular lid 14, which will be described later, to the annular opening 13 a. In the present embodiment, a through hole 11 is formed in the center of the earpiece 10a, and is formed in an annular shape with a hole in the center in a plan view of fig. 1 (a). In fig. 1(b), the lid 14 side is rectangular in front view, and the opposite side to the lid 14 is rounded.

The end of the container-like base 13 on the side opposite to the lid 14 has a pinna insertion side end 13d into which a pinna is inserted. The auricle-insertion-side end portion 13d has an outer peripheral-side bent portion 13d1 of a curved shape from the outer peripheral wall 13c of the container-like base 13 to the tip. Further, the auricle-insertion-side end portion 13d has an inner peripheral-side curved portion 13d2 having a curved shape from the inner peripheral wall 13b of the container-like base 13 to the front end. Since the outer peripheral side bent portion 13d1 is provided, the ear hole can be easily inserted. Further, since the outlet side of the through hole 11 is expanded in a trumpet shape by the inner peripheral side bent portion 13d2, the sound passing through the through hole 11 becomes easy to spread in the ear. In addition, since the auricle-inserting-side end portion 13d has the outer peripheral-side bent portion 13d1 and the inner peripheral-side bent portion 13d2 on the front end side, there is an advantage that air bubbles are hardly taken in when the filling material 15 is injected in manufacturing the earpiece 10 a. The shape of the container-shaped base 13 on the side opposite to the lid 14 may be, in addition to the shape shown in fig. 2, a circular shape as a whole, a bellows shape having a tapered portion, a shape tapered toward the tip end, or the like.

Preferably, the "adhesive end portion" to which the lid 14 is adhered, that is, the opening portion 13a as an adhesive surface is formed so as to be positioned on the same plane, so as to be easily adhered to the lid 14 in a flat plate shape. On the other hand, the opening 13a of the inner peripheral wall 13b of the container-shaped base 13 and the opening 13a of the outer peripheral wall 13c may be surfaces having different heights. Further, since the rubber-like elastic film forming the container-like base 13 has a small area in a vertical cross section, if the cross section is directly defined as the opening 13a, the area of adhesion with the lid 14 is small, and the adhesion is poor. Therefore, the thickness of the rubber-like elastic membrane is gradually increased toward the opening 13a, and the length along the radial direction of the lid 14 (length t1 in fig. 3) at the opening 13a is larger than the length of the cross section in the average thickness portion of the rubber-like elastic membrane forming the container-like base 13, that is, the length of the middle portion of the outer peripheral wall 13c of the container-like base 13 (length t2 in fig. 3). In fig. 3, the width of the inner peripheral wall 13b of the earpiece 10a on the upper end side is not wide. However, it is preferable that the opening 13a on the upper end side of the inner peripheral wall 13b has the same width as the opening 13a on the upper end side of the outer peripheral wall 13c, since the adhesion area with the lid 14 is increased, and the adhesion force can be improved.

The container-like base 13 is preferably stretchable and freely deformable, and has high flexibility and stretchability. Therefore, the container-like base 13 is formed of a rubber-like elastic film. As the rubber-like elastic material forming the container-like base 13, a rubber-like elastic material such as a thermoplastic elastomer or a thermosetting rubber can be used. Examples of the thermoplastic elastomer include styrene-based elastomers, olefin-based elastomers, polyester-based elastomers, polyurethane-based elastomers, and polyamide-based elastomers. Examples of the thermosetting rubber include styrene rubber, butadiene rubber, isoprene rubber, nitrile rubber, butyl rubber, chloroprene rubber, ethylene propylene rubber, silicone rubber, acrylic rubber, urethane rubber, and fluororubber. The filling material 15 is preferably a material that has little swelling and penetration, and has little air permeability to air. In addition, silicone rubber is small in permanent deformation for compression and tension, and can have low hardness, and is preferable in this respect.

The hardness of the rubber-like elastic material forming the container-like base 13 is preferably within A low hardness range of about 5 to 30 in JIS-A hardness, more preferably 10 to 20. Further, the elongation is preferably 200% or more. If the hardness is less than a hardness of 5, the rubber-like elastic membrane may be weakened in strength and easily broken. If the hardness is higher than a hardness of 30, it may be difficult to obtain a soft touch of the rubber-like elastic film. If the elongation of the rubber-like elastic body is less than 200%, the possibility of being easily broken when the earpiece 10a is deformed becomes high.

The thickness of the rubber-like elastic film of the container-like substrate 13 is preferably in the range of 0.1mm to 2 mm. When the thickness is thinner than 0.1mm, the film tends to be easily broken. If the thickness is thicker than 2mm, the property of the filler material 15 filled inside is difficult to be transferred to the outside.

The lid 14 is a member that seals the opening 13a of the container base 13 and encloses the filler 15. From the viewpoint of ease of manufacture, the lid 14 is preferably formed in a plate shape. In the present embodiment, the container-shaped base 13 is formed in an annular plate shape having a hole 14a formed therein corresponding to the inner peripheral wall 13b thereof. When the opening 13a on the inner peripheral wall 13b side of the container-shaped base 13 and the opening 13a on the outer peripheral wall 13c side are surfaces having different heights, the lid 14 may be a plate surface having different heights on the inner peripheral side and the outer peripheral side of the lid 14.

The same material as that of the container-like base 13 can be used for the lid 14. The same material includes the same material in which the container-like base 13 is silicone rubber and the lid 14 is silicone rubber, and the same material in which the container-like base 13 is a certain type of silicone rubber and the lid 14 is another type of silicone rubber or the container-like base 13 is silicone rubber and the lid 14 is butyl rubber. The same material is preferable in that an adhesive agent which can easily adhere to both the container-like base 13 and the lid 14 can be easily selected. In addition, it is preferable in that the same tactile sensation can be obtained as the entire earpiece 10 a.

The lid 14 may be made of a different material from the container base 13. For example, a resin film or a resin plate may be used for the container-shaped substrate 13 made of a rubber-like elastic film. The use of a resin film is preferable in that the load is low, the burden on the ear is small, and the production cost can be suppressed.

The hard cylindrical portion 16 is a cylindrical portion made of a hard material adhered to the inner peripheries of the container-shaped base 13 and the lid 14. The hard tube portion 16 includes a base-side tube portion 16a adhered to the inner peripheral wall 13b of the container-like base 13 and a lid-side tube portion 16b adhered to the inner periphery of the lid 14. The hard tube portion 16 is formed by adhering the lid 14 to the container-shaped base 13 and integrally adhering the base side tube portion 16a and the lid side tube portion 16 b. The base-side cylindrical portion 16a is formed in a cylindrical shape, and the entire outer peripheral surface thereof is adhered to the inner peripheral wall 13b of the container-shaped base 13. The lid side tube portion 16b is formed in a disk shape, and the entire outer peripheral surface thereof is adhered to the inner peripheral portion of the rubber-like elastic film constituting the lid 14. The hard tube 16 is formed of a hard material harder than the container-like base body 13. This prevents excessive deformation of the container-shaped base 13, and prevents the through-hole 11 through which sound passes from being crushed and blocked. The hard tube 16 is made of a hard material. This suppresses sound absorption and effectively transmits sound into the ear.

The end of the hard tube 16 on the opposite side to the lid 14 is arranged inside the front end (auricle insertion side end 13d) of the container base 13 to prevent the hard tube 16 from hitting the ear and to freely deform the front end of the container base 13. On the other hand, the lid side tube portion 16b, which is the end portion of the hard tube portion 16 on the lid 14 side, is configured to extend to the inner peripheral wall 14b of the lid 14 made of a rubber-like elastic film and to be flush with the surface of the lid 14. In the present embodiment, since the lid body side tube portion 16b constituting a part of the hard tube portion 16 is provided on the inner peripheral wall 14b of the lid body 14, the thickness of the opening portion 13a on the inner peripheral wall 13b side of the container-shaped base body 13 does not need to be increased. The base-side tube portion 16a provided on the container base 13 side and the lid-side tube portion 16b provided on the lid 14 side are made of the same material, and the adhesion can be improved. Therefore, the shortage of the adhesion force between the inner peripheral wall 13b of the container-shaped base 13 and the lid 14 can be compensated. Therefore, a wide opening can be formed in the container-like base 13, and the filler 15 can be easily injected into the container-like base 13 during the manufacturing process.

The hard tube portion 16 has a function of holding the container-shaped base 13 to have a wide opening without deforming the inner peripheral wall 13 b. In this respect, the container-like base body 13 also makes it easy to inject the filler material 15. The lid body side tube portion 16b of the hard tube portion 16 is adhered to the lid body 14, and therefore functions as an "adhered end portion". The lid 14 including the lid side tube portion 16b continuously seals the upper end portion of the base side tube portion 16a of the hard tube portion 16 and the opening portion 13a of the container-shaped base 13, and therefore can adhere to the container-shaped base 13 and can more reliably prevent liquid leakage.

As the material of the hard tube portion 16, a hard resin can be used, and a material which is excellent in mechanical strength, heat resistance, durability, dimensional accuracy, reliability, etc., is light in weight, and has good workability is suitably used. As such a hard resin, a thermoplastic resin such as a polypropylene resin, a polyethylene resin, a polyvinyl chloride resin, a polystyrene resin, an acrylonitrile-styrene-acrylate resin, an acrylonitrile-butadiene-styrene resin, a polyamide resin, a polyacetal resin, a polycarbonate resin, a polyethylene terephthalate resin, a polybutylene terephthalate resin, a Polyphenylene oxide resin (Polyphenylene oxide resin), a Polyphenylene ether resin (Polyphenylene ether resin), a Polyphenylene sulfide resin, a polyurethane resin, a liquid crystal polymer, or a composite resin of these resins can be used. As the thermosetting resin, epoxy resin, urethane resin, or the like can be used. In addition, if a hard resin having an impact absorbing property is used, the cushioning effect of the member can be improved.

The filler 15 may be a liquid, viscous body, gel-like material, or the like that can be deformed and flowed at normal temperature, and may be either oil-based or water-based. The filler 15 is a liquid, viscous body, gel-like material, or the like that can be deformed and flowed at room temperature, and therefore is softer than a crosslinked and high-molecular solid or foam, and has flexibility, good conformability to ears, and little wearing feeling when worn on ears. Further, by filling the filler 15, external sound is more easily blocked than in the case of a void that is not filled with anything. Examples of such a material include paraffin, fluid paraffin, silicone grease, silicone gel, silicone oil, polyurethane gel, and slurry. Paraffin, flowing paraffin, and silicone oil, which do not adversely affect the human body even if the filler 15 leaks outside, are preferable, and silicone grease, silicone gel, polyurethane gel, and slurry are preferable in terms of preventing leakage. In the present invention, the deformable-flowable at ordinary temperature means deformable or flowable at ordinary temperature of 25 ℃.

Additives, powders, and the like may be added to the filler 15 in order to adjust viscosity, sound insulation, vibration damping property, and the like, within a range that does not impair the property of being deformable and flowable at room temperature. In the case of the water-based filler 15, a thickener such as carrageenan, sodium carboxymethylcellulose, xanthan gum, guar gum, or pectin, a stabilizer, a gelling agent, or paste viscosity may be added to adjust the viscosity. In addition, other additives such as preservatives may be added. Alternatively, a slurry or the like may be used, which is prepared by adding borax to PVA (Polyvinyl alcohol) and crosslinking the PVA. Alternatively, fine powders such as silica powder and resin powder (polyethylene and the like) may be contained. By containing such a material, sound is made difficult to pass through the filler 15, noise from the outside is not absorbed, and sound insulation and attenuation are improved. For example, silicone grease containing the above fine powder in silicone oil has high viscosity, and therefore, sound insulation properties and vibration damping properties can be adjusted well. It is also possible to use a liquid material such as paraffin or flowing paraffin containing the above fine powder.

The viscosity of the filler material 15 is preferably in the range of 10 to 300 million cSt. In the case of viscous fluids, 1/4 consistency of 100 to 800 is preferred. In the case of the gel, the penetration is preferably in the range of 100 to 500. When the viscosity of the filling material 15 is less than 10 ten thousand cSt, when the 1/4 consistency of the viscous fluid exceeds 800, and when the penetration of the gel exceeds 500, the fluidity is high, and the resilient property is increased and the wearing feeling on the ear is increased in the case where the storage section 12a in which the filling material 15 is stored and the storage section 12a are hollow, as in the case where the filling material 15 is stored. In addition, if the container-shaped base 13 is damaged, it is easily scattered to the outside. On the other hand, when the viscosity of the filling material 15 is higher than 300 ten thousand cSt, when the 1/4 consistency of the viscous fluid is less than 100, and when the penetration of the gel is less than 100, the fluidity may deteriorate, and the soft feeling may not be obtained, and the wearing feeling may deteriorate. Within these preferable ranges of viscosity and penetration, the high viscosity further suppresses the wearing sensation of the ear, and the uncomfortable feeling is reduced. 1/4 consistency and penetration are based on JISK2220 measurements.

Further, it is preferable that the filling material 15 be a fluid having high thixotropy, so that it can be easily inserted by being deformed when inserted into an ear hole, and the shape of the earpiece 10a can be maintained during use, and it is difficult to pull out the earpiece 10 a. Preferably, the thixotropic index (TI value) exceeds 1 and is below 5. If the thickness is 1 or less or more than 5, it is difficult to obtain such an effect that the insert is easily deformed when the ear hole is inserted and the thixotropy is hardly removed when the shape is maintained after the insertion.

The earpiece 10a in which the filling material 15 is sealed has low resiliency, and therefore can be easily inserted while being deformed when inserted into an ear hole, maintains its shape during use, does not strongly press the ear hole, and provides a good feeling of use when used for a long period of time. The filler 15 is filled with a restoring force due to the rubber-like elasticity of the container-like base 13, so that the restoring force can be delayed.

The delay of the generation of the restoring force can be expressed by a hysteresis loss rate (JISK 6400-2). The hysteresis loss rate indicates a mechanical energy loss in one cycle of deformation and recovery, and is determined from a force-deflection curve obtained by performing a compression load deflection test. The greater the hysteresis loss rate, the slower recovery, and the lower the rebound force after pushing. That is, in the earpiece, after insertion into the ear hole, the pressing force against the ear hole is reduced. Preferably, the rate of hysteresis loss of the handset is above 25%. The compression load deflection test was carried out by compressing the entire surface at a compression rate of 10 mm/min at a maximum of 1kgf for a holding time of 0 second, and measuring a hysteresis loss rate of compression recovery.

The filling material 15 is preferably filled in an amount of 50 to 95 vol%, or more than 95 vol% and less than 100 vol%, or 100 vol% of the filling material 15 in the container 12a formed in the earpiece body 12 and containing the filling material 15. If the filling amount of the filler 15 is less than 50 vol%, it is difficult to obtain the effect of filling the filler 15, as in the case of making the housing portion 12a hollow. On the other hand, if the filling amount of the filler 15 is more than 100%, the repulsive force at the time of pressing becomes large, and a hard touch is generated, and a soft touch is not provided. When the filling amount of the filler 15 is 50 to 95 vol%, bubbles such as air can be added to the filler by containing the bubbles to a considerable extent. When the filling amount of the filler 15 exceeds 95 vol% and is less than 100 vol%, bubbles can be trapped between the rubbery elastic membrane and the filler 15 by containing some bubbles, and the properties of both the rubbery elastic membrane and the filler 15 can be easily reflected. When the filling amount of the filler 15 is 100 vol%, the rubber-like elastomer film can be integrated with the filler 15 while eliminating the influence of bubbles. As described above, different wearing feelings can be achieved depending on the filling amount of the filler 15.

A low-permeability permeation-preventing film that prevents permeation or permeation of the filler 15 and air can be provided on the inner surface or the outer surface of the container-shaped base 13 and the lid 14, or surface treatment can be performed. Examples of the film to be formed include a film formed by a fluorine-based coating agent, a butyl rubber film, and a urethane-based film. The surface treatment may be a known water repellent treatment or oil repellent treatment. Further, a silicone coating or the like may be provided on the outer surface to smooth the outer surface or to polish the outer surface.

The adhesion between the container-shaped base 13 and the lid 14 can be achieved by a method using an adhesive or an adhesive, or a method using welding or welding. Since the adhesive portion needs to have flexibility even after the adhesion, when an adhesive is used, an adhesive having flexibility even after the adhesion is preferably used. In addition, even when an adhesive or an adhesive is used, it is preferable that these materials are materials that do not allow the filler 15 to permeate or penetrate therethrough. In the method of adhering the container-shaped base 13 and the lid 14, both of which are made of silicone rubber, to each other with a silicone adhesive, even if the operation of releasing the pressing force after crushing and returning to the original shape is repeated 5000 times, no liquid leakage occurs and a load test of 100kgf at maximum is applied, and therefore, this is a preferable combination.

One example of a method of manufacturing the handset 10a is illustrated. Fig. 3 is an explanatory view of integrating the container-shaped base 13 and the lid 14. The container-like base 13 and the lid 14 are formed in advance into a predetermined shape from a rubber-like elastic material. At this time, the base side tube portion 16a is integrated with the inner peripheral wall 13b of the container-like base 13, and the lid side tube portion 16b is integrated with the inner peripheral wall 14b of the lid 14. These integrations can be performed by insert molding or bonding of hard materials, for example. The filling material 15 may also be prepared beforehand.

Next, a predetermined amount of the filler 15 is injected into the hollow portion (the storage portion 12a) in the container-shaped base 13 in order to obtain a predetermined wearing feeling. When a material having poor fluidity is filled, the temperature can be increased to improve the fluidity, and the material can be filled. Then, the opening 13a as the "adhesive end portion" of the container-shaped base 13 is adhered to the lid 14 by an adhesive or an adhesive, welding, or the like. At the same time, the base-side tube portion 16a and the lid-side tube portion 16b are also bonded together by an adhesive or a cohesive agent, welding, or the like. The material of the lid 14 may be coated on the container-shaped base 13 inserted into the mold and integrally molded by crosslinking. By such a method, the earpiece 10a can be easily manufactured. The earpiece 10a thus obtained is flexibly deformed corresponding to the ear hole, and can be brought into close contact with the ear. In addition, a desired wearing feeling can be obtained. Further, external sound transmitted into the earpiece 10a is also absorbed by the filler 15, and the sound insulation is good, and if the earphone is used, sound passes through the hard tube 16 having a secured shape, and a low-pitched sound range is easily heard. When the earphone has the earpiece 10a, a member constituting the earphone, such as a driving unit, is disposed on one side of the cover 14.

< first modification (fig. 4) >: fig. 4 shows an earpiece 10b of a first modification. In the earpiece 10a described in the above embodiment, an example is shown in which a cover side tube portion 16b, which is a part of the rigid tube portion 16, is provided on the inner peripheral wall 14b of the cover 14. In contrast, in the first modification, the base side tube portion 16a as the hard tube portion 16 is not provided on the inner peripheral wall 14b of the lid body 14, but is provided only on the inner peripheral wall 13b of the container-shaped base 13. This eliminates the need to integrate the lid body side tube portion 16b when manufacturing the lid body 14, and reduces the manufacturing cost. In the first modification, the opening 13a of the container-shaped base 13 is also wide on the inner peripheral wall 13b side. Since the inner peripheral wall 13b side is also wide, the area of the opening 13a can be expanded, and the adhesion force with the lid 14 can be improved.

< second modification (fig. 5) >: fig. 5 shows an earpiece 10c of a second modification. In the receiver 10b of the first modification, the cover 14 is not positioned on the surface of the hard tube portion 16 (base-side tube portion 16 a). In contrast, in the second modification, the end face of the hard tube portion 16 (base-side tube portion 16a) is covered with the lid 14, and the lid 14 and the hard tube portion 16 are bonded to each other. According to the second modification, the adhesion between the lid 14 and the container base 13 can be improved.

< second embodiment (FIG. 6) >: fig. 6 shows an earpiece 20a of a second embodiment. The earpiece 20a differs from the earpiece 10a of the first embodiment in that the rigid skirt 16 is not used. By not providing the hard tube portion 16, the soft feeling of the entire handset 20a can be increased. Further, since the hard tube portion 16 is not provided, the manufacturing is easy accordingly.

< third modification (fig. 7) >: fig. 7 shows an earpiece 20b of a third modification. The earpiece 20b is obtained by changing the shape of the outer peripheral wall 13c of the container-like base 13 of the earpiece 20a of the second embodiment. As shown in fig. 7, the earpiece 20b has a shape obtained by deforming the outer peripheral wall 13c of the container-shaped base 13, and has a shape in which the tip end is recessed inward from a half position of the outer peripheral wall 13 c. That is, the container-shaped base 13 has a distal end portion 13e located on the insertion side of the auricle and a bulging portion 13f bulging outward in the radial direction with respect to the distal end portion 13 e. By providing the distal end portion 13e of the earpiece 20b, the earpiece can be placed in the ear so as to be separated from the ear wall, the wearing feeling when inserted into the ear can be reduced, and the distal end portion 13e can be inserted deep into the ear. Further, since the bulging portion 13f is thicker than the distal end portion 13e, the earpiece 20e can be reliably brought into contact with the ear wall at the bulging portion 13 f. Further, when the earpiece 20e is inserted into the auricle, the bulging portion having a large outer shape can be stably held by the fingers, and thus the earpiece 20e can be easily worn on the auricle.

< fourth modification (fig. 8) >: fig. 8 shows an earpiece 20c of a fourth modification. The earpiece 20c has a shape in which the length of the earpiece 20b of the third modification is elongated in the axial direction of the through-hole 11. The container-like base 13 has a distal end portion 13e formed in a tapered shape such that the outer peripheral wall 13c tapers toward the distal end portion. The proximal end of the distal end portion 13e is formed so as to be continuous with a portion of the expanded portion 13f that is recessed with respect to the end portion on the lid 14 side. In the fourth modification, the distal end portion 13e is mainly inserted into the auricle, and the expanded portion 13f is not inserted into the auricle. According to the fourth modification, since the load is dispersed even if the container-like base 13 is pressed, the rubber-like elastic film has no weak portion and is in a shape that is less likely to leak liquid.

< fifth modification (fig. 9) >: fig. 9 shows an earpiece 20d of a fifth modification. The length of the earpiece 20d is the same as that of the earpiece 20c of the fourth modification, but unlike the earpiece 20c of the fourth modification, the earpiece 20d is tapered so as to taper from a portion along the outer shape of the lid 14 toward the front end portion without providing a recess in the outer peripheral wall 13c of the container-like base 13. In the fifth modification, the portion with a narrow taper is the tip portion 13e, and the portion at the base end thereof is the bulging portion 13 f. In the fifth modification, the distal end portion 13e is mainly inserted into the auricle, and the expanded portion 13f is not inserted into the auricle. In the fifth modification, since the container-shaped base 13 does not have a bulging portion like a bellows, the mold is easily removed, and an air pool is less likely to be generated in the housing portion 12 a.

< third embodiment (FIG. 10) >: fig. 10 shows an earpiece 30a of the third embodiment. In the earpiece 30a, the hard portion 17 is formed on the inner peripheral wall 14b of the cover 14, and the hard portion 17 functions similarly to the cover-side tube portion 16b of the hard tube portion 16. The hard portion 17 is annular and is formed of a molded body of a rubber-like elastomer film or a hard resin which is harder than the container-like base 13. By providing the hard portion 17 on the inner peripheral wall 14b of the cover 14, the through hole 11 through which sound passes is secured on the cover 14 side, and when used as an earphone or the like, the hard portion can be easily used as an adhesion portion to be adhered to an earphone main body (not shown).

< fourth embodiment (FIG. 11) >: fig. 11 shows an earpiece 40a of the fourth embodiment. The earpiece 40a differs from the earpieces 10a, 20a of the first and second embodiments in that the rigid tube portion 16 is not provided and the through hole 11 is not provided. By not providing the through hole 11, the present invention can be suitably used for earplugs and the like.

< sixth modification (fig. 12) >: fig. 12 shows an earpiece 40b of a sixth modification. The earpiece 40b is formed by making the outer peripheral wall 13c of the container-like base 13 of the earpiece 40a of the fourth embodiment into a shape in which the tip is tapered. As shown in fig. 12, since the earpiece 40b has a shape with a tapered tip, the contact portion with the ear hole can be made smaller than that of the earpiece 40a of the fourth embodiment, which has an advantage of reducing the wearing feeling.

< fifth embodiment (FIG. 13) >: fig. 13 shows an earpiece 50a of the fifth embodiment. The earpiece 50a differs from the earpiece 20c of the fourth modification in that the lid 14 is formed in a funnel shape and that the container-shaped base 13 has a grip 13g protruding from the lid 14. Both the container-shaped base 13 and the lid 14 are formed of a rubber-like elastic film, and a portion corresponding to the hard tube portion 16 is not present in the earpiece 50a, so that the entire earpiece 50a can be flexibly and elastically deformed to follow the shape of the auricle. A butyl rubber film (not shown) as a permeation-preventing film is formed on the entire inner surface of the container base 13.

The inner peripheral end of the lid 14 is adhered to the upper end of the inner peripheral wall 13b with an adhesive or the like. The outer peripheral end of the lid 14 is bonded to the adhesive stepped portion 13h by an adhesive or the like, and the adhesive stepped portion 13h serves as an opening 13a formed in the inner peripheral surface of the outer peripheral wall 13 c. The adhesion step 13h of the container base 13 on the auricle insertion side end 13d is formed at a position higher than the upper end of the inner peripheral wall 13 b. Therefore, the filler 15 is filled to the upper end of the inner circumferential wall 13 b. Therefore, the filler 15 cannot be filled in the storage portion 12a above the upper end of the inner peripheral wall 13b, and air remains.

The holding portion 13g is formed to expand in a horn shape from the adhesion stepped portion 13 h. More specifically, the grip portion 13g is formed by a curved slope extending a funnel-shaped slope of the lid 14. In this way, when the handset 50a is taken out from the auricle, the gripping portion 13g can be gripped by the gripping portion 13g to easily pull out the handset 50a, by the gripping portion 13g projecting from the adhesive stepped portion 13h and the lid 14. Further, when the earpiece 50a is taken out from the auricle, the user can hold the grip portion 13g which is not inserted into the auricle and is located outside the auricle, and therefore, from the viewpoint of hygiene, even a person who feels a sense of interference with holding the part inserted into the auricle can hold the grip portion 13g without interference, which is convenient.

A distal end portion 13e having a tapered distal end and a bulging portion 13f bulging in a curved shape are formed on the outer peripheral wall 13c of the container-shaped base 13. By providing the distal end portion 13e, the insertion into the auricle can be facilitated, and the distal end portion 13e can be disposed in the ear so as to be separated from the wall of the ear, thereby reducing the feeling of wearing when inserted into the ear, and being capable of inserting the distal end portion 13e deep into the ear. Further, since the bulging portion 13f is thicker than the distal end portion 13e, the filling amount of the filler 15 existing inside the bulging portion 13f increases, and the earpiece 20e can be reliably brought into contact with the ear wall in the bulging portion 13 f. Further, when the earpiece 20e is inserted into the auricle, the expanded portion having a large outer shape can be stably held by the fingers, and thus the earpiece 20e can be easily worn on the auricle.

< seventh modification (fig. 14) >: fig. 14 shows an earpiece 50b of a seventh modification. The earpiece 50b is formed by extending the bulging portion 13f of the fifth embodiment. By forming the bulging portion 13f long, the ear wall of the auricle can be closely attached over the entire length thereof. The front end portion 13e located at the front end of the bulging portion 13f is formed short, and has a positioning function when the earpiece 50b is inserted into the auricle.

The above embodiments are examples of the present invention, and modifications, additions, combinations, and the like can be made to the embodiments without departing from the scope of the present invention, and these techniques are also included in the scope of the present invention. For example, a handset having a shape other than the above-described shape can be used by rotating the outer peripheral wall 13c of the container base 13 around the vertical axis. The shape of the lid 14 is illustrated as a flat shape, but is not limited to a flat shape, and may be, for example, a shape that is raised on the side opposite to the side to which the container-shaped base 13 is adhered. By forming the shape in this manner, the corners of the cover 14 can be smoothed, and the entire handset can be designed to have a rounded shape.

Description of the reference numerals

10 a: earpiece (first embodiment), 11: through hole, 12: earpiece body, 12 a: housing section, 13: container-like base, 13 a: opening, 13 b: inner peripheral wall, 13 c: outer peripheral wall, 13 d: auricle insertion-side end portion, 13d 1: outer peripheral side bent portion, 13d 2: inner peripheral side bent portion, 13 e: front end portion, 13 f: bulge, 13 g: grip portion, 13 h: adhesion step, 14: lid, 14 a: hole, 14 b: inner circumferential wall, 15: filler, 16: hard tube portion, 16 a: base-side tube section, 16 b: lid-side tube portion, 17: hard portion, 10 b: earpiece (first modification), 10 c: earpiece (second modification), 20 a: earpiece (second embodiment), 20 b: earpiece (third modification), 20 c: earpiece (fourth modification), 20 d: earpiece (fifth modification), 30 a: earpiece (third embodiment), 40 a: earpiece (fourth embodiment), 40 b: earpiece (sixth modification), 50 a: earpiece (fifth embodiment), 50 b: earpiece (seventh modification), t1, t 2: length.