JPH0681350B2 - earphone - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an auricle-mounted earphone that is used by being stored in a recess of a concha cavity of an auricle for use.

[Conventional technology]

The applicant of the present application eliminates the problems of the ear canal-insertion type earphone that is widely used and has an insertion portion having a sound output hole protruding from the earphone body, which is press-fitted into the ear canal and is excellent. We have proposed an auricle-mounted earphone that gives a comfortable wearing feeling and has improved acoustic characteristics.

This earphone is configured so that it can be worn by being housed in the concavity of the concha of the auricle in order to prevent the unpleasant sensation caused by press-fitting the auricle into the external auditory canal from deteriorating the acoustic characteristics. It will be.

That is, as shown in FIG. 1, the earphone includes an outer casing 1 that constitutes an earphone main body in which a unitized electroacoustic conversion element including a vibration plate, a magnetic circuit unit, and the like is incorporated, and the electroacoustic conversion element. A cord holding unit 3 that holds an external connection cord 2 that supplies an acoustic signal is configured. The outer casing 1 is formed in a size and shape that can be housed in a concave portion of the concha of the concha between the tragus and the antitragus. That is, the outer casing 1 has an outer peripheral surface on the back side facing the sound emitting surface side of the electroacoustic conversion element as an inclined surface portion 4 so that the front end side is reduced in diameter, and the entire shape is formed into a substantially truncated cone shape. There is. Then, on the sound emitting surface side of the electroacoustic conversion element of the outer casing 1, a front surface protection member 5 is attached which is formed so as to have a uniform curved surface by bulging the central portion.

Further, the cord holding portion 3 extends downward from the vicinity of the lower end of the rear end surface 1a of the outer casing 1 so as to be substantially parallel to the rear end surface 1a. That is, the cord holding portion 3 is formed to have a substantially L-shaped cross section as viewed from the side surface side, and has a base portion 3a serving as a connecting portion for the outer casing 1 and an external connection. An extending portion 3b formed in a substantially cylindrical shape that guides the cord 2 so as to extend downward.
It consists of and.

When the earphone configured as described above is housed and mounted in the concave portion of the concha of the ear, as shown in FIG. 2, the earphone has a tip A of the tragus a and a tip B of the antitragus b. The inclined surface portion 4 of the housing 1 is supported, and the cord holding portion 3 abuts at least one point C on the outer surface of the ear lobe c so that a part of the auricle e can be held at three support points. And is attached to the concave portion of the concha cavity f.

[Problems to be Solved by the Invention]

By the way, as described above, the earphone configured so as to be housed in the recess of the concha of the ear and mounted is an electroacoustic conversion element built in the outer casing and an external device that supplies an acoustic signal to the electroacoustic conversion element. The connection cord is connected by soldering inside the outer casing. If the work of connecting the external connection cord to the electroacoustic conversion element is performed before the electroacoustic conversion device is incorporated into the outer casing, it becomes extremely difficult to pull out the external connection cord from the outer casing. I will end up.

Therefore, the present invention achieves easy connection work of the external connection cord to the electroacoustic conversion element, facilitates assembling work of the electroacoustic conversion element into the outer casing, and facilitates assembly of the entire earphone. The present invention intends to provide an ear-wearable earphone that can achieve the above.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the earphone according to the present invention has a built-in electroacoustic conversion element, the sound emitting surface side of the electric effect conversion element is an opening, and the electroacoustic conversion element is provided on the back side. An insertion hole for inserting an external connection cord connected to the terminal plate is provided, and the diameter becomes smaller from the opening on the sound emitting surface side toward the back side where the insertion hole is formed, and the tragus of the auricle is formed. It is formed in a shape that can be housed in the concavity of the concha of the concha between the antitragus and the concha of the concha of the ear so that the concavity of the concha of the concha and the sound emitting surface of the electric effect conversion element face each other. An outer casing whose back side is supported by an tragus and an antitragus when housed in a concave portion, and a plurality of minute holes which are formed in a curved shape in cross section, and the sound emitting surface of the outer casing. The front protection member that covers the opening on the side and is attached to the outer casing. At the outer peripheral side portion of the electroacoustic conversion element, the edge portion of the opening on the sound emitting surface side of the outer casing is formed so that the outer peripheral edge of the electroacoustic conversion element and the peripheral edge of the outer casing are substantially flat from the back side. And the outer peripheral end of the front surface protective member and the outer peripheral end of the electroacoustic conversion element are substantially flush with each other from the sound emitting surface side to the outer peripheral portion of the electroacoustic conversion element. It is designed to be attached so that

[Action]

In the earphone according to the present invention, the outer housing containing the electroacoustic conversion element is inserted into the external connection cord connected to the terminal plate of the electroacoustic conversion element through the insertion hole provided in the outer housing. be able to. Therefore, the external connection cord can be inserted into the outer casing, the external connection cord can be connected to the electroacoustic conversion element in this state, and then the electroacoustic conversion element can be incorporated into the outer casing.

Further, the electroacoustic conversion element is housed and arranged in the outer housing from the front side which is an opening of the outer housing, and the sound emitting surface of the electroacoustic conversion element of the outer housing in which the electroacoustic conversion element is incorporated is exposed. The opening is covered with a front surface protection member having a plurality of micro holes.

〔Example〕

Hereinafter, specific examples of the present invention will be described with reference to the drawings.

The earphone according to the present invention, like the earphone configured as shown in FIG. 1 and FIG. 2 described above, has an outer casing 11 containing an electroacoustic conversion element 12 as shown in FIG. 3, and this outer casing.
The front surface protection member 15 covers the sound emission surface side of the electroacoustic conversion element 12 which is the front surface side of the electro-acoustic transducer 11.

The outer casing 11 is formed in a size and shape that can be housed in the recess of the concha of the concha between the tragus of the auricle and the antitragus. That is, the outer casing 11 is, as shown in FIG.
The outer peripheral surface on the back side facing the sound emitting surface side of the electroacoustic conversion element 12 built in here is inclined so that the tip side is reduced in diameter.
14, the overall shape is such that the diameter becomes smaller toward the back side, and the overall shape is formed into a substantially truncated cone shape. This outer casing
On the back side of 11 is formed an insertion hole 17 through which an external connection cord 16 for supplying an acoustic signal to the electroacoustic conversion element 12 is inserted, in a range extending from the substantially central portion to the inclined surface portion 14.

Further, the front surface protection member 15 is formed in a cap shape having a uniform curved surface by bulging the central portion as shown in FIG.

By the way, the electroacoustic conversion element 12 built in the outer casing 11 is
As shown in FIG. 3, a magnetic circuit section 21 including a yoke 18 having a U-shaped cross section, a magnet 19 arranged in the central portion of the yoke 18, and a top plate 20 arranged on the magnet 19. A vibrating system 26 including a vibrating plate 22 and a voice coil 25 wound around a voice coil bobbin 23 mounted so as to hang down on the back side of the vibrating plate 22 and inserted and arranged in the magnetic gap 24 of the magnetic circuit section 21. It consists of and. The vibrating system 26 fixes the outer peripheral edge of the diaphragm 22 via a diaphragm support ring 29 to the inner peripheral side of a ring-shaped portion 28 formed upright from a flange portion 27 formed on the outer periphery of the upper edge side of the yoke 18. Supported by the magnetic circuit unit 21 by the
A unitized electroacoustic conversion element 12 is configured.

A through hole 30 for radiating the backside vibration of the diaphragm 22 to the outside of the magnetic circuit portion 21 is formed at the center of the yoke 18 constituting the magnetic circuit portion 21. A braking material 31 is fitted in the through hole 30. Further, the backside vibration of the diaphragm 22 is also applied to the magnetic circuit portion 21 on the flange portion 27 formed on the yoke 18.
A through hole 31 that radiates outward is formed. A braking material 32 is attached to the back side of the through hole 31.

Then, a magnetic circuit unit that constitutes the electroacoustic conversion element 12
A lead wire 33 for supplying a drive current to the voice coil 25 drawn out from the voice coil 25 is connected to the back side of the voice coil 25, and an external connection cord 16 for electrical connection with the lead wire 16 is provided. Is attached to the terminal plate 34.

By the way, the electroacoustic conversion element 12 unitized as described above is inserted from the magnetic circuit portion 21 into the outer casing 11, and the outer periphery of the ring-shaped portion 28 formed by rising from the flange portion 27 formed on the yoke 18. The positioning projection 35 formed on the
The end 11a on the opening side of 11 is brought into contact with the outer casing 11, and the insertion and fitting position with respect to the outer casing 11 is positioned and built in the outer casing 11. At this time, as shown in FIG. 3, the opening side end 11a of the outer casing 11 is adapted to engage with the step portion of the positioning projection 35, and is substantially flush with the outer peripheral surface of the projection 35. Do it.

Further, the diaphragm 22 of the electroacoustic conversion element 12 formed as the opening 10 on the front surface side of the outer casing 11 incorporating the electroacoustic conversion element 12 therein.
The front surface protection member 15 is attached to the sound emitting surface side that faces.
The front surface protection member 15 is attached by fitting the fitting portion 15b formed on the outer peripheral end side of the uniform curved surface portion 15a into the ring-shaped portion 28 provided on the yoke 18. The front protection member 15
Is fitted with the fitting portion 15b brought into contact with the positioning projection 35 so that the fitting position of the electroacoustic conversion element 12 is regulated. The fitting portion 15 of the front surface protection member 15
As shown in FIG. 3, a also engages with the step portion of the positioning projection 35, and is substantially flush with the outer peripheral surface of the projection 35.

The outer casing 11 and the front surface protection member 15 are formed by a thin plate-shaped member having a large number of minute holes 36 having a sound transmitting property and a size that prevents a minute foreign substance from entering. The outer casing 11 and the front surface protection member 15 having the large number of minute holes 36,
It is formed by electroforming, which uses electrodeposition by electrolysis to reproduce the exact same mold as the original mold. That is, the outer casing
11 and the front surface protection member 15 are formed in a negative shape corresponding to the outer casing 11 and the front surface protection member 15 in which a large number of minute holes 36 are formed, and a metal such as copper, nickel or iron is electrodeposited on the negative shape. Let
It is formed by peeling the electrodeposited metal layer from the negative mold. The outer casing 11 and the front surface protection member 15 formed by this electroforming process are formed with an extremely thin wall thickness, and can have an extremely low acoustic impedance. Further, the minute holes 36 provided in the outer casing 11 and the front surface protection member 15 are formed as hexagonal through holes having a side of about 0.2 mm, for example, to prevent dust such as earwax from being impaired without impairing sound transmission. It can be sufficient to prevent intrusion.

In addition, since the micro holes 36 provided in the outer casing 11 and the front surface protection member 15 are arranged so as to radiate sound waves favorably, in the front surface protection member 15, the entire surface of a portion facing the diaphragm 22 is provided. It is preferable that the outer casing 11 is provided at least in a portion facing the through holes 30 and 31 formed in the magnetic circuit portion 21.

By the way, the external connection cord 16 for supplying an acoustic signal to the electroacoustic conversion element 12 incorporated in the outer casing 11 is inserted into the outer casing 11 through the insertion hole 17 formed in the outer casing 11,
It is connected to a terminal plate 34 attached to the back side of the magnetic circuit section 21 by soldering. The external connection cord 16 is connected to the terminal plate 34, and is held and extended by the cord holding portion 37 protruding to the outside of the outer casing 11 via the insertion hole 17. The cord holding portion 37 is formed to have a substantially L-shaped cross section as viewed from the side surface side, and a base portion 37a serving as a connecting portion for the cord holding portion 37.
And an extension portion 37b formed in a substantially cylindrical shape that extends and guides the external connection cord 16 so as to hang downward.

The earphone configured as described above is assembled in the following order, for example. That is, the cord holder 37
The external connection cord 16 inserted into the outer casing 11 is inserted into the outer casing 11 through the insertion hole 17. The end portion of the external connection cord 16 inserted through the outer casing 11 is connected to the terminal plate 34 attached to the back side of the magnetic circuit portion 21 by soldering to establish an electrical connection with the electroacoustic conversion element 12. Try. Next, the cord holder 37 is connected to the terminal plate 34 by resin molding or the like.
Here, the electroacoustic conversion element 12 is fitted into the outer casing 11 and housed in the outer casing 11 as described above. Then, the magnetic circuit portion 21 is supported on the outer peripheral edge on the front side of the outer casing 11 to accommodate the electroacoustic transducer 12 in the outer casing 11, and finally the electroacoustic transducer 12 is released. By assembling the earphone, the front surface protection member 15 is attached to the opening 10 on the front surface side of the outer casing 11 so as to cover the sound surface side.

〔The invention's effect〕

As described above, according to the present invention, since the outer housing containing the electroacoustic conversion element is provided with the insertion hole for inserting the external connection cord, the external connection cord is inserted into the outer housing, and in this state, The external connection cord can be connected to the electroacoustic conversion element, and then the electroacoustic conversion element can be incorporated into the outer casing. Therefore, connection work such as soldering of the external connection cord to the electroacoustic conversion element is facilitated, the work of assembling the electroacoustic conversion element into the outer casing is facilitated, and the assembly of the entire earphone is facilitated. can do.

Furthermore, after the electroacoustic conversion element has been incorporated into the outer casing, a front surface protection member that covers the sound emitting surface side of the electroacoustic conversion element can be attached, so that the electroacoustic conversion element can be stored in the concavity of the concha of the ear. The electroacoustic conversion element can be accurately positioned and attached to the outer casing formed in the obtained shape, and the work of attaching the front surface protection member becomes easy.

Furthermore, in the electroacoustic conversion element, the outer peripheral portion is engaged with the edge portion of the opening on the sound emitting surface side of the outer casing from the back side which is the magnetic circuit section side, and the front surface protection member of the electroacoustic conversion element. Since it is attached to the outer peripheral part, the outer casing has a small diameter toward the back side and is formed in a shape that can be stored in the concave portion of the concha of the concha between the tragus and the antitragus of the auricle. Even if it is a thing, it becomes possible to use the thing in which the size in the radial direction on the sound emitting surface side is equal to the size of the opening on the sound emitting surface side of the outer casing. Therefore, a larger electroacoustic transducer can be used, the reproduction frequency characteristic can be improved, and the ease of assembly can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an auricle-mounted earphone, which is a premise of the present invention, and FIG. 2 is a rear view showing a state in which the earphone is mounted on the auricle. 3 is a sectional view of an earphone according to the present invention, FIG. 4 is a perspective view showing an outer casing constituting the earphone, and FIG. 5 is a perspective view showing a front surface protection member constituting the earphone. is there. 10 …… Aperture 11 …… Outer casing 12 …… Electro-acoustic transducer 15 …… Front protection member 16 …… External connection cord 17 …… Insertion hole provided in the outer casing

Continuation of the front page (56) Reference JP-A-57-13893 (JP, A) Actually opened 53-164826 (JP, U) Actually opened 54-14216 (JP, U)

Claims (1)

[Claims] 1. An electroacoustic conversion element is built-in, a sound emitting surface side of the electroacoustic conversion element serves as an opening, and an external connection cord connected to a terminal plate of the electroacoustic conversion element is inserted into the back side. An insertion hole is provided, the diameter of which decreases from the opening on the sound emitting surface side toward the back side where the insertion hole is formed, and the concha of the concha located between the tragus and the antitragus of the auricle. The back side is formed into a shape that can be stored in the recess, and when the back side is stored in the recess of the concha cavity so that the recess of the concha of the ear and the sound emitting surface of the electroacoustic transducer face each other. And an outer casing supported by an anti-cross, and having a plurality of minute holes formed in a curved cross section and attached to the outer casing while covering the opening on the sound emitting surface side of the outer casing. And a front protection member that is provided, wherein The edge portion of the opening on the sound emitting surface side of the housing is engaged so that the outer peripheral edge of the electroacoustic conversion element and the peripheral edge of the outer housing are substantially flush with each other from the back surface side, and the front surface protection member is provided. An earphone configured to be attached to the outer peripheral portion of the electroacoustic conversion element from the sound emitting surface side such that the outer peripheral edge of the front surface protection member and the outer peripheral edge of the electroacoustic conversion element are substantially flush with each other.