JPH0242896A - Earphone - Google Patents

Abstract

PURPOSE:To facilitate the assembly of a whole earphone by providing a front surface protecting part which is fitted at the sound emitting surface side of the electric acoustic converting element of an outer enclosure, which is equipped with a uniform curved surface and, simultaneously, in which plural microholes are provided. CONSTITUTION:An outer enclosure 11 has an insertion hole 17 for inserting a cord 16 for an external connection of a built-in electric acoustic converting element 13 and is formed in a shape to be housed in the recessed part of an concha to exist between tragus and antihelix of a helix. A front surface protecting part 15 is fitted to the sound emitting surface side of the element 13, it is equipped with a uniform curved surface 15a, and simultaneously, plural microholes 36 are provided in it. In such a manner, the outer enclosure 11 having the built-in element 13 can be inserted through the insertion hole 17 provided on the outer enclosure 11 to the cord 16. Consequently, the cord 16 is inserted to the outer enclosure 11, the connection of the cord 16 to the element 13 is executed in such a condition, thereafter, the assembling work of the element 13 to the outer enclosure 11 can be executed, and the assembly of the earphone can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pinna-mounted earphone that is used by being housed in a recess in the concha cavity of the pinna.

[Prior Art] The applicant of the present application has solved the problems of earphones of the ear canal insertion type, which have been widely used in the past and are worn by press-fitting an insertion part having a sound emitting hole protruding from the earphone body into the ear canal. We are proposing a pinna-type earphone that solves all of these problems, provides a comfortable wearing experience, and improves acoustic characteristics.

These earphones are constructed so that they can be placed in a recess in the concha cavity of the auricle in order to prevent uncomfortable windows and deterioration of acoustic characteristics that would result from press-fitting the auricle into the external auditory canal. It is what it is.

That is, as shown in FIG. 1, the earphone includes an outer casing 1 constituting an earphone body containing a unitized electroacoustic transducer consisting of a diaphragm, a magnetic circuit section, etc., and the electroacoustic transducer. and a cord holding section 3 that holds an external connection cord 2 for supplying an acoustic signal to the external connection cord. The outer casing 1 is formed in a size and shape that allows it to be accommodated in a recess in the concha cavity between the tragus and antitragus of the auricle. That is, the outer casing 1 has an inclined surface portion 4 on the outer circumferential surface on the back side opposite to the emitting back side of the electroacoustic transducer element so as to reduce the diameter on the tip side, and the overall shape is formed into a substantially truncated conical shape. . A front protection member 5 is attached to the sound emitting surface side of the electroacoustic transducer of the outer casing 1. The front protection member 5 is formed to have a uniformly curved surface with a bulged central portion.

Further, the cord holding portion 3 extends downward from near the lower end side of the back side end surface 1a of the outer part 111 so as to be substantially parallel to the back side end surface 1a.

However, this cord holding part 3 is formed so that its cross-sectional shape when viewed from the side side is approximately in the shape of a letter. The connecting cord 2 is composed of an extending portion 3b formed in a substantially cylindrical shape that extends and guides the connecting cord 2 so as to hang downward.

When the earphone configured as described above is housed and worn in the recess of the concha cavity, it is pulled out by two points, the tip A of the tragus a and the tip B of the antitragus, as shown in Fig. 2. The inclined surface part 4 of the housing l is supported, and the cord holding part 3 abuts at least one point C on the outer surface of the ear lobe C, so that a part of the auricle e is held between the three supporting points. It is attached to the four parts of the concha cavity r.

[The famous problem that the invention attempts to solve]

By the way, as described above, the earphone configured to be housed and worn in the recess of the concha cavity supplies an acoustic signal to the electroacoustic transducer 9 built in the outer casing and the electroacoustic transducer. The external connection cord is connected by soldering inside the outer casing.

If this external connection cord is connected to the electroacoustic conversion element before the electroacoustic @conversion element is inserted into the outer casing, it will be extremely difficult to pull out the external connection cord from the outer casing. It becomes difficult.

Therefore, the present invention facilitates the work of connecting the external connection cord to the electroacoustic transducer, and also simplifies the work of assembling the electroacoustic V transducer into the outer casing, thereby facilitating the assembly of the entire earphone. This paper aims to provide earphones that can be worn on the auricle and make it possible to achieve this goal.

Able to perform work.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has an insertion hole through which an external connection cord of a built-in electroacoustic transducer is inserted, and the auricle shell between the tragus and the antitragus of the auricle. an outer casing formed in a shape that can be accommodated in the recess of the cavity; and a uniformly curved surface attached to the sound emitting surface side of the electroacoustic transducer of the outer casing, and provided with a plurality of microholes. This configuration includes a front protection section.

[Effect]

In the present invention, an external connection cord connected to the electroacoustic transducer can be inserted through the outer casing containing the electroacoustic transducer through an insertion hole provided in the outer casing. Therefore, the external connection cord is inserted into the outer casing, the external connection cord is connected to the electroacoustic transducer in this state, and then the electroacoustic transducer is incorporated into the outer casing [Example] Hereinafter, the present invention A specific example will be described with reference to the drawings.

Similar to the earphone configured as shown in FIGS. 1 and 2 described above, the earphone according to the present invention includes an outer fdll containing an electroacoustic transducer 12 as shown in FIG. The electroacoustic transducer 12 on the front side of
A front protection member 15 that covers the sound emitting surface side of the device is provided.

The outer housing 11 is formed in a size and shape that allows it to be accommodated in a recess in the concha cavity between the tragus and antitragus of the auricle. That is, as shown in FIG. 4, this outer casing 11 has an inclined surface portion on the outer circumferential surface on the back side opposite to the sound emitting surface side of the electroacoustic transducer 12 built therein so as to reduce the diameter on the tip side. 14, and the overall shape is formed into a substantially truncated cone shape.

An insertion hole 17 through which an external connection cord 16 for supplying an acoustic signal to the electroacoustic transducer element 12 is inserted is formed on the back side of the outer casing 11 in a range extending from the approximate center to the inclined surface section 14. ing.

Further, as shown in FIG. 5, the front protection member 15 is formed into a cap shape with a bulged central portion and a uniformly curved surface.

By the way, as shown in FIG. 3, the electroacoustic transducer 12 built in the outer casing 11 has a yoke I8 having a U-shaped cross section.
Magnet 1 placed in the center of this yoke 18
9 and a top plate 20 disposed on the magnet 19; a diaphragm 22; The vibration system 26 includes a voice coil 25 inserted into the magnetic gear 24 of the magnetic circuit section 21. This vibration system 26
is a flange portion 27 formed on the outer periphery of the upper edge of the yoke 18.
By fixing the outer circumferential edge of the diaphragm 22 via a diaphragm support ring 29 to the inner circumferential side of the ring-shaped portion 28 that is formed upright from the magnetic circuit section 21, a unitized electrical sound V is supported by the magnetic circuit section 21. A conversion element 12 is configured.

In addition, the yoke that constitutes the magnetic circuit section 21! A through hole 30 is provided in the center of the diaphragm 8 to radiate back vibration of the diaphragm 22 to the outside of the magnetic circuit section 21 . This through hole 3
A braking material 31 is fitted into the brake member 0. Further, the flange portion 27 formed on the cork 18 is also provided with a through hole 31 for radiating back vibration of the diaphragm 22 to the outside of the magnetic circuit portion 21 . A braking material 32 is attached to the back side of the through hole 31.

A lead wire 33 for supplying a driving current to the voice coil 25 drawn out from the voice coil 25 is connected to the back side of the +11 air circuit section 21 constituting the electroacoustic transducer 12. A terminal plate 34 is attached to which an external connection cord 16 for electrical connection with the wire 33 is connected.

By the way, the electric sound V converter element 12 unitized as described above is inserted into the outer casing 11 from the magnetic circuit section 21, and the ring-shaped section formed rising from the flange section 27 formed on the yoke 18 is inserted into the outer casing 11 from the magnetic circuit section 21. A positioning protrusion 35 protruding from the outer periphery is brought into contact with the opening side end 11a of the outer casing 11,
The insertion/fitting position with respect to the outer casing 11 is determined, and the casing is built into the outer casing 11. The front protection member 15 is disposed on the front side of the outer casing 12 containing the electric sound V conversion element 12, which is the sound emitting surface side of the electroacoustic conversion element 12. The front protection member 15 is attached by fitting a fitting portion 15b formed on the outer peripheral side of the uniformly curved surface portion 15a into a ring-shaped portion 28 provided on the yoke 18. Note that the front protection member 15 is fitted by bringing the fitting portion 15b into contact with the positioning protrusion 35, so that the electric sound 9 conversion element 12
The fitting position is regulated and installed.

The outer casing 11 and the front protection member 15 are formed of a thin plate-like member that is sound permeable and has a large number of micro holes 36 that are large enough to prevent the entry of minute foreign matter. . The outer casing 11 and the front protection member 15 having a large number of micropores 36 are made using electrodeposition by electrolysis, and are made in exactly the same mold as the original. Formed by electroforming process manufactured by XI. That is, the outer casing II and the front protection member I5 are
A negative mold corresponding to the outer casing 11 and the front protection member 15, in which a large number of micro holes 36 are formed, is formed, and this negative mold is coated with copper,
It is formed by electrodepositing a metal such as nickel or iron and peeling off the electrodeposited metal layer from the negative mold.

The outer casing 11 and the front protection member 15 formed by this TL electroforming process are formed with an extremely thin wall thickness, and can have extremely low acoustic impedance.

Further, the micro holes 36 provided in the outer casing 11 and the front protection member 15 are formed, for example, as hexagonal transparent holes with each side of about 0.2 m, so that they do not impede acoustic transparency.
It can be made sufficient to prevent the intrusion of dirt such as earwax.

Note that the micro holes 36 provided in the outer casing 11 and the front protection member 15 are provided on the entire surface of the portion of the front protection member 15 facing the diaphragm 22 in order to improve the radiation of sound waves. In the outer casing 11, it is desirable to provide at least a portion facing the through hole 30.31 formed in the magnetic circuit portion 2J.

By the way, the electroacoustic transducer 12 built in the outer casing 11
An external connection cord 16 for supplying an acoustic signal is inserted into the outer casing 11 through an insertion hole 17 formed in the outer casing 11, and is connected to a terminal plate 34 attached to the back side of the magnetic circuit section 21. Connected by soldering. The external connection cord 16 is connected to the terminal plate 34 and extended while being held by a cord holding portion 37 that projects outward from the outer casing 11 through the insertion hole 17 . The cord holding portion 37 is formed so that its cross-sectional shape when viewed from the side side is approximately in the shape of a letter.
It is composed of a base portion 37a serving as a connecting portion for the external connection cord 16, and an extending portion 37b formed in a substantially cylindrical shape that extends and guides the external connection cord 16 so as to hang downward.

The earphone constructed as described above is assembled, for example, in the following order. That is, the code holding section 3
7, insert the external connection cord 16 through the insertion hole 1.
The end of the external connection cord 16 inserted through the outer case 11 is connected to the terminal plate 34 attached to the back side of the magnetic circuit section 21 by soldering. Then, electrical connection with the electric sound V conversion element 12 is established.

Next, the cord holding portion 37 is connected to the terminal plate 34 by resin molding or the like. Here, the electroacoustic transducer 1
2 into the outer casing 11 as described above, and this outer casing l.
Store in l. Then, the earphone is assembled by fitting and disposing it on the front side of the outer casing 11 via the magnetic circuit section 21.

[Effects of the Invention] As described above, in the present invention, the outer casing containing the electroacoustic transducer element is provided with an insertion hole through which the external connection cord is inserted. In this state, the external connection cord is connected to the electroacoustic transducer, and then the electroacoustic V transducer can be assembled into the outer casing. Therefore, the connection work such as soldering the external connection cord to the electroacoustic transducer element is made easier, the work of assembling the electroacoustic transducer element into the outer casing is facilitated, and the overall assembly of the iA/phone is facilitated. Facilitation can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an auricle-mounted earphone, which is the premise of the present invention. FIG. 2 is a rear view showing the state in which the earphone is attached to the auricle. FIG. 3 is a sectional view of the 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 protection member constituting the earphone. It is. DESCRIPTION OF SYMBOLS 11...Outer casing 12...Electroacoustic transducer element 15...Front surface general member 16...External connection cord 17...Through hole provided in the outer casing Fig. 4 Fig. 5

Claims (1)

[Claims] It has an insertion hole through which the external connection cord of the built-in electroacoustic transducer element is inserted, and can be stored in a recess in the concha cavity between the tragus and antitragus of the auricle. an outer casing formed into a shape, and a front protection part attached to the sound emitting surface side of the electroacoustic transducer of the outer casing and having a uniformly curved surface and a plurality of micro holes. earphone.