JPH0242895A - Electric acoustic converter - Google Patents

Abstract

PURPOSE:To realize a mounting to the recessed part of an concha with satisfactory mounting feeling by, as for an outer enclosure, thinning the width in a thickness direction intersecting orthogonally with a sound emitting surface in comparison with a diameter at a sound emitting surface side in the front of an electroacoustic element. CONSTITUTION:The width in the thickness direction intersecting orthogonally with the sound emitting surface is thinned in comparison with the diameter of the sound emitting surface side in the front of an electric acoustic converting element 15, and an outer enclosure 16 is fitted in the concha. Thus, the whole of the outer enclosure 16 is housed so as to be wrapped in the recessed part of the concha. By three points of two points of an inclined part 19 of the outer enclosure 16 supported by a leading edge A of an antihelix and the leading edge of a tragus and one point of the internal side surface of an extended part 18b of a cord holding part 18 to abut on one point (c) on the outer surface of a lobe, the enclosure 16 is house-mounted in the concha so as to pinch one part of a helix. Consequently, without pressing an ear hole, the enclosure can be mount-held in one part of the helix simultaneously and stably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an auricle-mounted electroacoustic transducer that is used by being mounted so as to be housed in a recess in the concha cavity of the auricle.

[Conventional technology]

2. Description of the Related Art Conventionally, as an auricle-mounted electric sound nine transducer, one configured as shown in FIGS. 6 and 7 is known.

What is shown in FIG. 6 is a pinna-mounted earphone,
This earphone has an auricle insertion section 3 with a sound path 2 formed therein protruding from one end surface of an earphone body 1 which has a built-in electric tone converting element including a diaphragm, and this auricle insertion section 3 is inserted into the auricle of the auricle. It has a grooved bottom so that it can be inserted into the external auditory canal, which is continuous with the concha cavity, and is attached to the auricle.

Furthermore, in the one shown in FIG. 7, a pair of earphones 4.5 are connected by a connecting rod 6 so that stereo reproduction can be performed. The one shown in FIG. 7 also includes each earphone 4.
．． Earphone bodies 1 and 1 constituting the earphone 5 have an auricle insertion section 3 formed with a sound path 2 projecting from one end surface thereof, and are configured to be inserted into the ear canal and attached to the auricle. That's what happens.

In both of the devices shown in FIGS. 6 and 7 as described above, the auricle insertion portion 3 is inserted into the external auditory canal to be worn, so a feeling of pressure cannot be avoided when the device is worn.

In addition, depending on the extent to which it is pushed into the ear canal, the above-mentioned sensations of pain and discomfort may be felt in the ear canal.Furthermore, deterioration of the reproduced sound quality is unavoidable.

In order to solve the problems that such earphones have, as shown in FIG. 8, a crimp band 7 is provided on one side of the speaker 6, and a curved string 8 with elasticity is provided for the ear hook. Something has been proposed. This hook-on type earphone is used by crimping a compression band on the outside of the auricle and hooking the string 8 around the outer periphery of the auricle.

[Problem to be solved by the invention]

However, in the case of the above-mentioned ear hooks, it is possible to solve the problems of those that are worn by inserting the auricle insertion part into the external auditory canal as described above, but it is possible to The condition is unstable, and not only is it impossible to obtain a good wearing condition, but depending on the mounting position with respect to the auricle, the reproduced sound quality may deteriorate.

In addition, headphones are widely used in which a pair of speakers are attached to both ends of an elastic headband, and the speakers are pressed to the pinna of the ear using the elastic force of the elastic headband. If this happens, the elastic force of the headband will create a feeling of pressure on the head, making it unavoidable to feel uncomfortable when wearing the headband.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a novel auricle-mounted electroacoustic transducer that can solve all the problems of conventional earphones and headphones as described above.

Another object of the present invention is to provide an electroacoustic transducer that can be installed in a concave portion of the concha cavity with a good feeling of wearing, and that provides a stable wearing condition.

Furthermore, the present invention aims to provide an electroacoustic transducer that can achieve a larger diaphragm and obtain good acoustic characteristics.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention incorporates an electroacoustic transducer, and forms a uniform curved surface on the sound emitting surface side in front of the electroacoustic V transducer, as well as a tragus of the auricle. an outer casing formed in a shape that can be stored in a recess in the concha cavity between the tragus and supported by the tragus and the tragus when stored in the recess in the concha cavity; - A cord for an external connection cord of the electroacoustic transducer element, which is extended to the outer casing so that it can extend toward the lower side of the auricle when the outer casing is stored in the recess of the concha cavity; The outer casing has a width in the thickness direction corresponding to the sound emitting surface that is thinner than the diameter of the sound emitting surface in front of the electroacoustic transducer, and the cord holding portion is It is provided on the back side of the external housing behind the electric sound V converting element mentioned above, and has a cross-sectional shape that is substantially in the shape of an upper letter.

(Function) The electroacoustic transducer according to the present invention has an electroacoustic transducer element 15
By making the width in the thickness direction perpendicular to the sound emitting surface thinner than the diameter on the front sound emitting surface side, and making the flat outer casing 16 fit inside the concha cavity, the outer casing 15 The outer casing 16 is housed so as to be entirely wrapped in the recess of the concha cavity, and is supported by the tip A of the tragus C and the tip of the antitragus d, as shown in FIGS. 3 and 4. A part of the auricle a is held between three points: two points on the inclined portion 19 and one point on the inner surface of the extending portion 18b of the cord holding portion 18 that abuts at least one point C on the outer surface of the earlobe. It is supported and stored in the concha cavity.

In addition, an external connection cord 17 that inputs and outputs acoustic signals to and from the electroacoustic transducer 15 built into the outer casing 16 is inserted and held in a cord holding portion 18 that has a cross-sectional shape of about 17. It is pulled out to the outside of the outer casing 16.

〔Example〕

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

As shown in FIGS. 1 and 2, the electroacoustic transducer according to the present invention includes an outer casing 16 containing an electroacoustic transducing element 15 consisting of a diaphragm, a magnetic circuit section, etc., and an outer casing 16 that extends into the outer casing 16. A cord 1 for external connection from the electric sound g conversion element 15 is provided.
7 to the outside of the outer casing I6.

The outer part 116 is formed in a size that can be accommodated in a recess of the concha cavity, which is a concave part of the auricle a, and is formed at at least two points on the outer circumferential surface when stored in the concave cavity of the concha cavity. is formed with an external shape that can be supported by the tragus C, which is a part of the auricle a, and the tragus d.

By the way, the sizes of each part of the concha cavity of the auricle a of the person in which the outer casing 16 is stored are shown with reference to FIG.
The diameter r1 of the concave portion of the concha cavity is approximately 10In11 to 20
The distance II from point A at the tip of tragus C to point B at the tip of tragus d, which protrudes oppositely toward the concha cavity, is in the range of about 4 to 12IllI11. , the depth of the concha cavity near the tip of the tragus C is 7 to 14 a.
It is in the range of about m.

In addition, the portion extending from the bottom of the concha cavity to the tragus C and the antitragus d has a curved rising shape f.

Therefore, the outer casing 16 to be housed in the recess of the concha cavity having the size and shape described above has a diameter R2 in the range of about 14 mm to 18 mm and a width as shown in FIG. W,
Approximately 5.5m to 7. It is formed as a range of 5 am. A cap 16a is disposed on the front side of the outer casing 16, that is, on the sound emitting surface side in front of the electroacoustic transducer element, and has a circular shape and a uniformly curved surface with a bulging central portion. There is.

Furthermore, when the diaphragm constituting the electric sound W converting element 15 of the housing 16 is housed in the concha cavity, the back surface of the auricle a facing toward the evening side has a tapered shape. Inclined part 19
is formed as. The inclination angle e of the inclination part 19 is made to be an angle that substantially corresponds to the curved rising surface r of the concha cavity, and is formed at an inclination angle of about 35 degrees with respect to the back side end surface 20, for example. That is, as shown in FIGS. 1 and 2, the outer casing 16 has a convergence width in the thickness direction perpendicular to the sound emitting surface with respect to the diameter R9 on the sound emitting surface side in front of the electroacoustic transducer 15. W1 is made thin, and the whole is formed into a flat substantially truncated cone shape.

Further, the cord holding portion 18 extending from the outer casing 16 extends downward from the lower end side of the back side end surface 20 of the outer casing I6, which is the rear back side of the electric sound V conversion element 15.
It is extended so that it is almost parallel to the That is, as shown in FIG. 2, the cord holding portion 18 is formed to have a substantially L-shaped cross section when viewed from the side, and serves as a connecting portion to the outer casing 16. base 18
a, and an extending portion 18b formed in a substantially cylindrical shape that extends and guides the external connection cord 17 so as to hang downward. The cord holding section 18 is attached to the outer casing 1.
6 is housed so as to fit into the recess of the concha cavity, the auricle at a position below the tips A and B of the tragus C and tragus d, which serve as support points for supporting the outer casing 16. It is provided so as to be able to come into contact with one point C on the outer surface of a as necessary. That is, the code holding section 18 has 94 cases 16
It is attached to the outer casing 16 via a base portion 18a that protrudes outward from the rear end surface 20 of and is provided at a slight downward inclination. Further, the extending portion 18b extends from the outer casing 16 such that its inner surface 18c is located substantially on the same plane as the rear end surface 20 of the outer casing 16. When the outer housing 16 is stored in the concave part of the concha cavity, the cord holding part 18 is inserted into the notch i between the tragus C and the tragus d, as shown in FIGS. 3 and 4. The inner surface 18c of the extending portion 18b abuts at least one point C on the outer surface of the ear lobe as necessary.

Since the front side of the outer casing 16 has a substantially uniformly curved surface, it is accommodated only in the recess of the concha cavity without being inserted into the external auditory canal.

As shown in FIGS. 3 and 4, the electroacoustic transducer according to the present invention configured as described above has the tip A of the tragus C.
and the inclined portion 1 of the outer casing 16 supported by the tip of the opposite bead d.
9 and one point 3 on the inner surface of the extending portion 18b of the cord holding portion 18 that abuts at least one point C on the outer surface of the earlobe.
It is supported so as to sandwich a part of the auricle a at the points, and is housed and installed in the concha cavity. In particular, since the contact point of the extension part 18b of the cord holding part 18 against the earlobe is located below the support point that supports the outer casing 16, the tip A of the tragus C, whose support point is the outer casing 16, It acts to prevent the tragus d from rotating in the direction of the arrow X in FIG. 4, which is the direction in which it will fall from the concha cavity, centering on two points at the tip B of the tragus d.

By the way, as described above, the outer casing 16 has a diameter R1 on the sound emitting surface side in front of the electroacoustic transducer 15, and a width W1 in the thickness direction perpendicular to the sound emitting surface is made thinner, so that the outer casing 16 is generally flat as a whole. Since it is formed in a truncated conical shape, the electroacoustic transducer 15 is located close to the sound emitting surface, and the heavy magnetic circuit portion is also located close to the sound emitting surface. Therefore, when installed in the concha cavity, the electroacoustic transducer 15 can be positioned inside the concave portion of the concha cavity, so that the fourth
The rotational force in the direction of the arrow X in the figure can be reduced, and easy falling off can be prevented.

The electroacoustic transducer according to the present invention, which is housed and attached to the concha cavity with a structure that can be supported at three points, can be stably and securely attached to a part of the auricle a without putting pressure on the ear canal. be able to.

In addition, in the above-mentioned embodiment, the cord holding part 18 is
Although it extends from the lower end side of the auricle a, it is configured such that a contact point that can come into contact with at least one point on the outer surface of the auricle a can be located below the two points that support the outer casing 16. For example, outside the cord holding section 18? ! 16 does not have to be located on the lower end side of the outer casing 16. Furthermore, although the outer casing 16 is formed in a circular shape, the shape may be appropriately changed to an ellipse or the like to correspond to the concave portion of the concha cavity.

Further, in the above embodiment, an earphone-type electroacoustic transducer for the purpose of listening to reproduced sound has been described, but the present invention can be similarly applied to an auricle-mounted microphone.

[Effects of the Invention] As described above, the present invention provides an outer casing with a built-in electroacoustic transducer having a diameter in the thickness direction perpendicular to the sound emitting surface in front of the electroacoustic transducing element. The cord holding portion is provided on the back side of the outer casing behind the electroacoustic transducer, and the cross-sectional shape is approximately in the shape of a letter. Because it is formed, it is stored so as to be wrapped inside the concave cavity of the concha,
Not only can good mounting be achieved, but the external connection cord pulled out from the outer casing can be pulled out at a constant position, and an electroacoustic transducer can be constructed that can be easily mounted at a fixed mounting position with a good feeling of mounting.

In particular, the outer casing has a flat shape with a width in the thickness direction perpendicular to the sound emitting surface that is thinner than the diameter of the sound emitting surface in front of the electroacoustic transducer, so that the electroacoustic transducer is configured. The heavy magnetic circuit part can be arranged closer to the sound emitting surface side of the front surface of the outer casing, and when it is installed in the recess of the concha cavity, the magnetic circuit part can be arranged in a direction that extends outward from the recess. The rotational force of the layer can be reduced, allowing stable attachment of the layers.

In addition, the diameter of the sound emitting surface side of the outer casing is increased, and a cord holding portion for holding the external connection cord of the electroacoustic transducer so that it can extend toward the lower side of the auricle is attached to the outer casing. Since it is provided on the back side behind the electroacoustic transducer, the external connection cord can be drawn out of the outer casing by the shortest distance from the back of the electroacoustic transducer, increasing the space inside the outer casing. , it is possible to increase the size of the diaphragm of the electroacoustic g-conversion element incorporated here, and to improve the acoustic characteristics.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electroacoustic transducer configured as an auricle-mounted earphone according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 shows a state in which it is attached to the auricle. It is a rear view, and FIG. 4 is a partially sectional side view thereof. FIG. 5 is a front view of the auricle for explaining the present invention. FIG. 6 is a perspective view showing a conventional example, FIG. 7 is a perspective view showing another conventional example, and FIG. 8 is a perspective view showing still another conventional example. 15... Electroacoustic conversion element 16... Outer casing +6a.
...Cap 17 constituting the sound emitting surface of the outer casing...External connection cord 18...Cord holding part 18a...Base 18b of the cord holding part...Extending part a of the coat holding part... Auricle b... Concha cavity C.
... Tragus d... Antitragus h... Ear lobe 1... Intertragal notch Figure 6 Figure 5 @ 7A Figure 8

Claims (1)

[Claims] An electroacoustic transducer is built in, the sound emitting surface side in front of the electroacoustic transducer is made into a uniformly curved surface, and the concha between the tragus and the antitragus of the auricle is formed. an outer casing formed in a shape that can be accommodated in the recess of the concha cavity and supported by the tragus and the antitragus when the outer casing is accommodated in the recess of the concha cavity; and a cord holding portion for an external connection cord of the electroacoustic transducer, which is extended to the outer casing so that it can extend toward the lower side of the auricle when stored in the auricle, and the outer casing has an electric The width in the thickness direction perpendicular to the sound emitting surface is made thinner than the diameter of the sound emitting surface in front of the acoustic transducer, and the cord holding portion is located on the back side of the outer casing behind the electroacoustic transducer. An electroacoustic transducer having a substantially L-shaped cross section.