JP3218417U - Earpiece and earphone using the same - Google Patents

Abstract

An earpiece of a single size can be used for various sizes and shapes of the concha cavity and the external auditory canal, improving wearability and obtaining good sound reproducibility. An earpiece (30) of a sealed earphone includes an outer skin (40) inserted into an outer ear having an ear concha space located in the auricle and an external auditory canal that is continuous with the ear concha space, and an inner side from the tip of the outer skin (40). And a cylindrical inner skin 50 into which the sound conduit of the earphone main body is detachably inserted. The outer skin 40 has a tapered truncated cone shape corresponding to the diameter of the ear canal, and is extended to a predetermined length on the ear canal insertion portion 41 inserted into the ear canal and the rear end side of the ear canal insertion portion 41. And a conical cavity insertion part 42 having a substantially cylindrical shape to be inserted into the concha cavity. A diameter-enlarged portion 52 whose diameter increases toward the tip is formed in the tip opening 51 of the endothelium 50. [Selection] Figure 1

Description

  The present invention relates to an earpiece for inserting an outer ear to be attached to an earphone (for example, a close-contact earphone called a canal-type earphone) and an earphone using the earpiece.

FIG. 6 is a schematic perspective view showing the structure of the outer ear into which the earphone is inserted.
The ear is roughly divided into an outer ear 10, a middle ear and an inner ear (not shown). The outer ear 10 includes an auricle 11 that protrudes from the side of the face and collects sound waves, and a curved external auditory canal 13 having a length of about 2.5 cm to 3 cm from the center of the auricle 11 to the eardrum on the middle ear side. It is configured. The external auditory canal 13 has a function of transmitting sound waves collected by the pinna 11 to the eardrum and amplifying high-frequency sound waves to make it easy to hear. A concha cavity 12 is formed in a concave portion in the center of the auricle 11, and an external auditory canal 13 is connected to the concha cavity 12.

  Conventionally, as described in, for example, Patent Documents 1 and 2, a sealed earphone is known as one of earphones connected to a portable music player or the like to reproduce music or the like. The sealed earphone is inserted into the external auditory canal 13 in the external ear 10 and is lightweight and excellent in portability.

  A sealed earphone is, for example, a housing that houses an electrical / acoustic transducer (hereinafter referred to as “driver unit”) that converts a sound signal, which is an electrical signal, into a sound wave, and a housing that projects from the housing. A cylindrical sound conduit that emits sound waves output from the unit; an earpiece made of an elastic material attached to the sound conduit; and a cord that supplies a sound signal from an external device to the driver unit. . And it is the structure which inserts and uses the earpiece with which the sound conduit was mounted | worn in the ear canal 13.

JP 2011-151793 A JP 2013-38756 A

However, the conventional earpiece and the sealed earphone using the same have the following problems (a) to (c).
(A) Since the earpiece made of an elastic material has good adhesiveness with the external auditory canal 13, it has an advantage that it has excellent sealing properties and hardly leaks sound to the outside. However, since earpieces of one size (size) cannot be adapted to the external auditory canal 13 of various sizes, it is inconvenient to prepare several types of earpieces such as large, medium and small.
(B) Since the concha cavity 12 and the external auditory canal 13 connected thereto are usually curved, when the ear piece is inserted into the concha cavity 12 and the external auditory canal 13, the distal end portion of the ear piece is curved and the distal opening May become narrower. When the tip opening of the earpiece becomes narrow, a part of the emitted sound wave is cut off, so that the sensitivity in the high sound range (for example, around 15 kHz) of the sound wave is lowered and the sound reproducibility is lowered.
(C) During the insertion of the earpiece, it becomes easy to come off due to vibrations and steaming in the vicinity of the ear canal 13, and the wearability is reduced.
Thus, the conventional earpiece and the sealed earphone using the earpiece have not been sufficiently satisfied by the user.

  The earpiece of the present invention includes an ear concha cavity located in the auricle, an outer skin inserted into the outer ear having an external auditory canal continuous to the ear concha cavity, an inward extension from the distal end of the outer skin, and the sound of the earphone main body. An earpiece having a cylindrical inner skin into which a conduit is detachably inserted, wherein the outer skin has a tapered truncated cone shape corresponding to the diameter of the ear canal and is inserted into the ear canal An insertion portion, and a substantially cylindrical turbinate insertion portion that is extended to a predetermined length on the rear end side of the ear canal insertion portion and is inserted into the concha cavity, An enlarged-diameter portion having a diameter that increases toward the tip is formed at the tip opening.

  For example, the thickness of the base portion of the diameter-expanded portion may be thinner than the site behind the inner skin. Further, the concha cavity insertion portion may have a diameter on the rear end side smaller than that on the front end side.

  The sealed earphone of the present invention includes the earpiece, and an earphone main body that has a sound conduit to which the earpiece is detachably attached, converts a sound signal into a sound wave, and emits the sound signal from the sound conduit to the earpiece. It is characterized by that.

The earpiece of the present invention and the sealed earphone using the earpiece have the following effects (A) to (D).
(A) Since the tapered inclination of the ear canal insertion portion corresponds to the size of the ear canal, one type of earpiece can support various sizes of the ear canal.
(B) Since the concha cavity insertion part is formed, it is easy to fit in the concha cavity and is excellent in holding the earphone body.
(C) Since the diameter-enlarged portion is formed at the tip opening of the earpiece, even if the tip of the earpiece is curved, the tip opening of the earpiece is not blocked, so that the high frequency range of sound waves (for example, around 15 kHz) Therefore, good sound reproducibility can be obtained.
(D) For example, if the thickness of the base portion of the enlarged diameter portion is made thinner than that of the site behind the endothelium, the entire outer skin can be easily bent, and it is possible to deal with various shapes of the concha and external auditory canals.

The block diagram which shows the earpiece in Example 1 of this invention Front view of a sealed earphone with the earpiece of FIG. Plan view of FIG. Bottom view of FIG. 2 is a longitudinal sectional view The perspective view which shows the structure of the outer ear where an earphone is inserted

  The mode for carrying out the invention will become apparent from the following description of the preferred embodiments when read in light of the accompanying drawings. However, the drawings are for explanation only and do not limit the scope of the present invention.

(Configuration of Example 1)
FIGS. 1A and 1B are configuration diagrams showing an earpiece according to Embodiment 1 of the present invention. FIG. 1A is a front view, and FIG. 1B is a longitudinal sectional view of the front view. is there. 2 is a front view showing a configuration example of a sealed earphone to which the earpiece of FIG. 1 is attached, FIG. 3 is a plan view of FIG. 2, FIG. 4 is a bottom view of FIG. 2, and FIG. FIG.

  As shown in FIGS. 2 to 5, the sealed earphone 19 according to the first embodiment includes an earphone body 20 that generates sound waves and an earpiece 30 that is attached to the earphone body 20 and guides the sound waves to the ear canal 13. Has been. The earphone body 20 has a housing 21 for storing acoustic components. The housing 21 has, for example, a front (front) housing 21a on the sound wave output side and a rear (rear) housing 21b on the back side of the front housing 21a. The front housing 21a and the rear housing 21b are, It is structured to be joined in a palm-clamped state with an adhesive or the like. A substantially cylindrical sound conduit 22 projects from the front surface of the front housing 21a, and a cord lead-out hole 23 is formed on the bottom surface of the rear housing 21b.

  A driver unit 24, which is an electric / sonic transducer, is fixed inside the front housing 21a in the vicinity of the joint between the front housing 21a and the rear housing 21b. The driver unit 24, for example, vibrates the diaphragm with a sound signal and converts it into sound waves, and outputs the sound waves to the sound conduit 22.

  The sound conduit 22 guides and emits sound waves output from the driver unit 24 in a predetermined direction, and an annular engagement portion (for example, an annular recess) 22a is formed in the middle of the outer peripheral surface. A small-diameter air hole 22b is formed behind 22a. A filter 25 for preventing dust intrusion is mounted in the opening on the discharge side of the sound conduit 22. In the vicinity of the annular recess 22a of the sound conduit 22, an earpiece 30 is detachably mounted.

  As shown in FIGS. 5 and 1, the earpiece 30 has a substantially umbrella-shaped outer skin 40 and a cylindrical inner skin 50 extending inward from the tip of the outer skin 40 and is made of an elastic material. ing. The outer skin 40 is inserted into the outer ear 10 having the concha cavity 12 located in the auricle 11 and the external auditory canal 13 connected to the concha cavity 12. The endothelium 50 is a member into which the sound conduit 22 is detachably attached.

  The outer skin 40 has a tapered truncated cone shape corresponding to the diameter of the ear canal 13, and extends to a predetermined length on the ear canal insertion portion 41 inserted into the ear canal 13 and the rear end side of the ear canal insertion portion 41. A conical cavity insertion part 42 having a substantially cylindrical shape that is inserted into the concha cavity 12. The concha cavity insertion part 42 has a smaller diameter on the rear end side than on the front end side.

The size of the outer skin 40 is, for example, as follows.
The length of the ear canal insertion portion 41 in the central axis direction of the earpiece 30;
6.2mm
The length of the concha cavity insertion part 42 in the direction of the central axis of the earpiece 30;
3.8mm
Thickness of outer skin 40: 0.5 mm
Outer diameter of the tip opening of the outer skin 40; 7.0 mm
Outer diameter of outer end opening of outer skin 40: 12.2 mm

  In the distal end opening 51 of the endothelium 50, a distal-side enlarged diameter portion 52 whose diameter increases toward the distal end is formed. The thickness of the base portion 52 a of the enlarged diameter portion 52 on the distal end side is smaller than that of the portion behind the inner skin 50. On the rear end side of the inner peripheral surface of the inner skin 50, an annular engaging portion (for example, an annular convex portion) 53 that engages with the annular concave portion 22a on the sound conduit 22 side is formed. Further, in the rear end opening 54 of the inner skin 50, a rear end-side enlarged diameter portion 55 whose diameter is increased toward the rear end is formed. The enlarged diameter portion 55 on the rear end side is an inclined surface for facilitating insertion of the sound conduit 22.

The size of the endothelium 50 is, for example, as follows.
Spread angle in the distal direction of the enlarged diameter portion 52 on the distal end side: 30 °
Inner diameter of base 52a; 4.6 mm
Inner diameter of inner peripheral surface of endothelium 50; 4.0 mm
Thickness at the center of the inner peripheral surface of the endothelium 50; 1.5 mm
Inner diameter of rear end opening 54; 4.6 mm
The inner diameter of the base of the enlarged diameter portion 55 on the rear end side; 3.5 mm

  When the elastic material forming the earpiece 30 is made of a material having a strong waist and a strong shape repulsive force, while preventing deterioration in sound quality due to crushing of the distal end opening 51 of the endothelium 50, The fit to the external auditory canal 13 can be enhanced to maintain stable wearability and sound quality. Various materials such as rubber and synthetic resin can be used as the material of the elastic material. However, since it is excellent in weather resistance and heat resistance and has no influence on the human body, for example, silicone rubber having a hardness of about 40 degrees is used. preferable. The material for forming the outer skin 40 and the inner skin 50 may be the same elastic material and the same hardness. However, in order to prevent separation from the sound conduit 22 during use, the material for forming the inner skin 50 compared to the outer skin 40 is used. The hardness may be increased (harder).

(Operation of Example 1)
When using the earphone 19 of the first embodiment, the outer skin 40 of the earpiece 30 is inserted into the user's external auditory canal 13. Then, the outer skin 40 of the earpiece 30 is smoothly inserted while being guided to the peripheral wall of the ear canal 13 through the concha cavity 12. The ear canal insertion portion 41 of the outer skin 40 is brought into close contact with the peripheral wall of the ear canal 13, the concha cavity insertion portion 42 is accommodated in the concha cavity 12, and the earphone 19 is inserted into the outer ear 10.

  When a sound signal output from an audio device or the like is input to the earphone 19 through a cord (not shown) drawn from the cord lead hole 23, the diaphragm in the driver unit 24 vibrates and is converted into a sound wave. It is discharged to the user's external auditory canal 13 through the sound conduit 22 and the endothelium 50 of the earpiece 30 and guided to the tympanic membrane.

(Effect of Example 1)
The earpiece 30 according to the first embodiment and the sealed earphone 19 using the earpiece 30 have the following effects (a) to (e).
(A) Since the tapered inclination of the ear canal insertion portion 41 in the earpiece 30 corresponds to the size of the ear canal 13, the earpiece 30 of one type can correspond to the ear canal 13 of various sizes.
(B) Since the concha cavity insertion part 42 is formed in the earpiece 30, it is easy to be accommodated in the concha cavity 12 and excellent in holding the earphone body 20. Since the diameter of the rear end side of the concha cavity insertion part 42 is smaller than the diameter of the front end side, the wearability with the concha cavity 12 is improved.
(C) An enlarged diameter portion 52 is formed in the tip opening 51 of the earpiece 30. Therefore, even if the tip of the earpiece is curved, the tip opening 51 of the earpiece 30 is not blocked, so that there is no decrease in sensitivity in the high sound wave range (for example, around 15 kHz) and good sound reproducibility can be obtained. .
(D) Since the thickness of the base portion 52a of the enlarged-diameter portion 52 on the distal end side is thinner than the portion behind the endothelium 50, the entire outer skin 40 is easily bent, and the concha cavity has various shapes. 12 and the external auditory canal 13.
(E) When the earphone is inserted, a small amount of outside air enters the external auditory canal 13 by the small air holes 22b formed in a part of the sound conduit 22, so that the feeling of pressure on the external ear 10 is reduced and the parallel feeling is reduced. The decrease is suppressed, and the wearing feeling is improved.
(Modification of Example 1)

The present invention is not limited to the first embodiment, and various usage forms and modifications are possible. For example, the following forms (1) to (3) are used as the usage form and the modified examples.
(1) The sound conduit 22 and the earpiece 30 are engaged with each other by fitting the annular concave portion 22a and the annular convex portion 53, but the concave / convex shape is reversed, or other engagement such as screwing is performed. The engagement structure may be changed.
(2) The overall shape, size, and structure of the earpiece 30 may be changed to other than the illustrated one. For example, an annular uneven groove may be formed on the outer peripheral surface of the outer skin 40. Thereby, it is hard to stuffy and it becomes difficult to remove | deviate by friction, and a mounting property improves.
(3) The housing 21, the sound conduit 22, and the driver unit 24 in the earphone main body 20 may be changed to shapes and structures other than those illustrated.

DESCRIPTION OF SYMBOLS 10 Outer ear 11 Auricle 12 Ear concha space 13 Ear canal 19 Sealed earphone 20 Earphone main body 21 Housing 22 Sound conduit 22a Annular recessed part 24 Driver unit 30 Earpiece 40 Outer skin 41 Outer ear canal insertion part 42 Ear concha cavity insertion part 50 Endothelial 51 End opening Portion 52 Expanded portion 52a Base 53 Annular convex

Claims (6)

An outer skin inserted into the outer ear having an ear concha space located in the auricle and an external auditory canal connected to the concha cavity;
A cylindrical inner skin that extends inward from the tip of the outer skin and into which the sound conduit of the earphone body is detachably inserted;
An earpiece having
The outer skin is
An outer ear canal insertion portion inserted into the ear canal, having a tapered truncated cone shape corresponding to the diameter of the ear canal;
A substantially cylindrical shape of the concha cavity insertion portion that is extended to a predetermined length on the rear end side of the ear canal insertion portion and is inserted into the concha cavity;
Have
In the tip opening location of the endothelium, an enlarged diameter portion is formed with a diameter expanding toward the tip,
Earpiece characterized by that. The thickness of the base of the enlarged diameter portion is thinner than the site behind the endothelium,
The earpiece according to claim 1. The concha cavity insertion part is
The rear end side diameter is smaller than the front end side diameter,
The earpiece according to claim 1. The concha cavity insertion part is
The rear end side diameter is smaller than the front end side diameter,
The earpiece according to claim 2, wherein: The outer skin and the endothelium are
By elastic material including silicone rubber,
It is formed, The earpiece of any one of Claims 1-4 characterized by the above-mentioned. The earpiece according to any one of claims 1 to 5,
An earphone main body having the sound conduit to which the earpiece is detachably attached, and converting a sound signal into a sound wave to be emitted from the sound conduit to the earpiece;
A sealed earphone characterized by comprising.

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