JPS646637Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a headphone for reproducing audio signals.

BACKGROUND TECHNOLOGY AND PROBLEMS Previously, a headphone as shown in FIGS. 1 and 3, which is inserted into the auricle in a housing housing a speaker unit, has been proposed. In FIG. 1, reference numeral 1 indicates a housing having a substantially truncated cone shape, and a speaker unit 2 is housed within the housing 1. As shown in FIG. Reference numeral 3 denotes a protector provided at a position facing the diaphragm 2a of the speaker unit 2, and the protector 3 is provided with a large number of through holes through which sound radiated from the diaphragm 2a of the speaker unit 2 passes. 4 is a code holding section 5 which is a code.

This headphone is inserted into the auricle A and worn as shown in FIG. That is, the housing 1 is disposed in a generally truncated conical cavity, the so-called concha cavity B, and the back side of the housing 1 is located below the concha cavity B, and extends above the concha cavity B from both sides. The cord holding part 4 is held down by the so-called tragus C and the anti-tragus D, and the cord holding part 4 forms a substantially U-shaped gap between the tragus C and the anti-tragus D, the so-called intertragal notch E.
will be distributed.

Headphones worn in this manner can be worn comfortably without causing a feeling of pressure in the ear canal, unlike earphones.

By the way, the entrance of the external auditory canal F is generally the concha cavity B.
It is located on the side of the. For this reason, the front of the speaker unit 2 is at an offset position with respect to the entrance of the external auditory canal F, and approximately half of the diaphragm 2a of the speaker unit 2 faces toward the entrance of the external auditory canal F, and the diaphragm 2a
There was an inconvenience that approximately half of the sound emitted from the ear canal leaked in the opposite direction to the entrance of the ear canal F. Furthermore, since there are individual differences in the size of the concha cavity B, when the housing 1 is installed in the concha cavity B, the degree to which the diaphragm 2a of the speaker unit 2 faces the external auditory canal F may vary depending on the person. There was an inconvenience that different tones produced differences.

What is shown in FIG. 3 is a headphone in which a support is provided in the housing so that the diaphragm of the speaker unit can be mounted with the diaphragm of the speaker unit facing the entrance of the ear canal. In FIG. 3, reference numeral 6 denotes a horseshoe-shaped headband, and hangers 7a and 7b are provided at both ends of the headband 6 for storing and holding the headband 6 inside.
Housings 1a and 1b are attached to one end of each of the hangers 7a and 7b via housing holders 8a and 8b. In this case, when the headband 6 is placed around the head of the person, the housing 1
The housing 1 is attached to the hangers 7a and 7b so that the diaphragm 2a of the speaker unit 2 housed in the speakers a and 1b faces the same plane as the face, that is, parallel to the plane that includes the headband 6 and the hangers 7a and 7b.
a and 1b are attached. Further, the housing holders 8a, 8b are connected to the housings 1a, 1 with respect to the hangers 7a, 7b by a so-called universal joint.
b are rotatably connected. 3a and 3b are protectors for the left and right speaker units, and 9 is a plug. The other configurations of the speaker unit 2 and the like are the same as those of the headphone shown in FIG. 1 above.

In such a headphone, the headband 6 is placed around the head H as shown in FIG. 4, and the housings 1a and 1b are attached to the left and right auricles A, respectively, so that the diaphragm 2a of the speaker unit 2 faces the entrance of the ear canal F. Insert and attach. In this case, the diaphragm 2a of the speaker unit 2 faces the eardrum G via the ear canal F, and the sound emitted from the diaphragm 2a is directly transmitted to the eardrum G, and relatively little sound is reflected from the ear canal F. Therefore, the diaphragm 2a of the speaker unit 2
Good sound quality can be obtained without being relatively influenced by the shape of the external auditory canal F, which differs from person to person.

By the way, in such a headphone in which the diaphragm 2a faces the entrance of the ear canal F when worn,
As shown in FIG. 5 when viewed from the front side of the face, the diaphragm 2a
Approximately half of the protector 3a facing the ear is covered with the tragus C, etc., but the remaining approximately half is exposed. For this reason, the sound radiated from the exposed portion of the diaphragm 2a leaks, resulting in a disadvantage that the efficiency is reduced.

Purpose of the invention In view of the above, the object of the present invention is to provide a device that can provide good sound quality with relatively little leakage of reproduced sound.

Summary of the invention The present invention is a headphone in which a speaker unit is inserted into the auricle, and a shielding plate is provided opposite the diaphragm of the speaker unit in a range where the diaphragm of the speaker unit does not face the external auditory canal. This headphone is designed to reduce leakage of reproduced sound, and according to the headphone of the present invention, leakage of reproduced sound is relatively small and good sound quality can be obtained.

Embodiment Hereinafter, an embodiment of the headphone of the present invention will be described with reference to FIGS. 6 to 8. This sixth
In the figures to FIG. 8, parts corresponding to those in FIG. 3 are denoted by the same reference numerals, and detailed explanation thereof will be omitted.

In this example, a speaker unit 2 is installed inside the protectors 3a and 3b as shown in FIGS. 6 and 7.
A semicircular shielding plate 10 is provided so as to face the diaphragm 2a. This shielding plate 10 is used to reduce the transmittance of sound emitted from the diaphragm 2a of the speaker unit 2, and as shown in FIG. The shielding plate 10 on the side corresponding to the right ear is designed to shield the right half of the diaphragm 2a of the speaker unit 2.
Other components such as the speaker unit 2 are constructed in the same manner as the conventional ones shown in FIGS. 3 to 5.

The headphone of this embodiment is mounted so that the diaphragm 2a of the speaker unit 2 faces the entrance of the ear canal F, as shown in FIG. in this case,
As seen from the front side of the face, as shown in FIG. 8, approximately half of the protectors 3a and 3b are covered by the tragus C, etc., and the remaining approximately half, that is, the portion shielded by the shielding plate 10, is exposed. . Sound radiated from the diaphragm 2a of the speaker unit 2 is radiated from a portion not shielded by the shielding plate 10. At this time, the highly directional high-frequency components of the sound from the portion of the diaphragm 2a facing the shielding plate 10 are blocked by the shielding plate 10, and the low-frequency components of the sound with weak directionality go around the shielding plate 10 and pass through the external auditory canal. It is transmitted to the eardrum G via F. Therefore, even with a relatively small diameter speaker unit 2 that tends to be relatively lacking in low frequency components, such as a headphone in which the speaker unit 2 is inserted into the auricle A, the low frequency components are audibly enhanced and good sound quality can be obtained. It will be done.

As described above, according to this example, in a headphone in which the speaker unit 2 is inserted into the auricle A, the diaphragm 2a of the speaker unit 2 is placed so as to face the diaphragm 2a of the speaker unit 2 in a range where the diaphragm 2a of the speaker unit 2 does not face the external auditory canal F. Since the shielding plate 10 is provided, the leakage of the radiated sound is reduced, and a higher efficiency can be obtained by the reduction in the leakage. or,
Since this shielding plate 10 reduces leakage of reproduced sound, the low-frequency components are audibly enhanced and good sound quality is achieved even in the speaker unit 2 with a relatively small diameter, which tends to lack low-frequency components. can get. Furthermore, since approximately half of the diaphragm 2a of the relatively small speaker unit 2 is shielded by the shielding plate 10, even if there are individual differences in the size of the concha cavity B, the diaphragm 2a of the speaker unit 2 relative to the ear canal F is
There is relatively little individual difference in the degree of aperture, and it is possible to obtain something that has relatively little difference in tone color depending on the person.

In FIG. 9, the frequency characteristics of the headphone according to this example are shown by a solid line, and the frequency characteristics of the headphone shown in FIG. 3 mentioned above are shown by a dashed line. As is clear from FIG. 9, with the headphone of this example, the low frequency components that are easily lost in the speaker unit 2 having a relatively small diameter were enhanced, and good sound quality was obtained.

Further, FIG. 10 shows another embodiment of the present invention. What is shown in FIG. 10 is a headphone in which a speaker unit 2 is inserted into the auricle A as shown in FIGS. A semicircular shielding plate 10 is provided.

It is easy to understand that the embodiment shown in FIG. 10 can also provide the same effects as the embodiments shown in FIGS. 6 and 7 described above.

It goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

Effects of the invention According to the headphone of the present invention, in a headphone in which the speaker unit is inserted into the auricle, a shielding plate is provided opposite to the diaphragm of the speaker unit in a range where the diaphragm of the speaker unit does not face the external auditory canal. Therefore, leakage of radiated sound is reduced, and efficiency can be increased by the amount of reduced leakage. In addition, this shielding plate reduces the leakage of reproduced sound, so even in speaker units with relatively small diameters that tend to lack low-frequency components, the low-frequency components are audibly enhanced and good sound quality is achieved. can get. Furthermore, since approximately half of the diaphragm of the relatively small speaker unit is shielded by the shielding plate, even if there are individual differences in the size of the concha cavity, the degree of opening of the diaphragm of the speaker unit with respect to the external auditory canal F can vary from person to person. It is possible to obtain something with relatively little difference, and relatively little difference in tone color depending on the person.

[Brief explanation of the drawing]

1 and 3 are a side view and a front view, respectively, of an example of a headphone, FIG. 2 is a schematic diagram for explaining the wearing state of the headphone shown in FIG. 1, and FIGS. FIG. 6 is a front view showing an embodiment of the headphone of the present invention, and FIG.
The figure is a schematic diagram showing the main part of Fig. 6, Fig. 8 is a schematic diagram for explaining the installed state of Fig. 6, and Fig. 9 is a schematic diagram showing the main part of Fig. 6.
3 and 3, and FIG. 10 is a front view showing another embodiment of the present invention. 1 is the housing, 2 is the speaker unit, 2a
10 is a diaphragm, 10 is a shielding plate, and A is an auricle.

Claims (1)

[Scope of Claim for Utility Model Registration] A housing that houses an electroacoustic transducer and a diaphragm, and has a shape that is locked by a part of the auricle when it is installed in a recess of the auricle, and the housing a protector having a plurality of through holes attached to the sound emitting surface side of the diaphragm, and a space between the diaphragm and the protector excluding the area facing the external auditory canal when the housing is attached to the recess of the auricle. A headphone characterized in that a shielding plate having a lower sound transmittance than a region facing the ear canal is provided in the headphone.