JPH08130572A - Ear microphone - Google Patents

Abstract

PURPOSE: To provide an ear microphone to which a dynamic type receiver unit with high tone quality and with good sensitivity is used and in which a whole dimension is suppressed to become large. CONSTITUTION: A spatial form in a housing 1 is formed in such a way that a rectangular microphone element 4 can be installed sideways from a main body part 3 to an ear chip part 2, and a columnar receiver unit 5 can be installed in the same direction as the microphone element 4 at the rear upper part of the microphone element 4 in the main body part 3. The microphone element 4 and the receiver unit 5 are set in a positional relation parallel in different levels. Thus, the whole dimension can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables the microphone element to generate a voice signal by receiving the voice from the receiver unit and receiving the bone conduction when the user speaks by inserting the voice signal into the ear canal. It relates to the improvement of ear microphones.

[0002]

2. Description of the Related Art Ear microphones, which are used in places where there is a large amount of ambient noise, insert an ear tip part forming a housing into the ear canal, and when the user utters the bone conduction in the ear canal. It is received by a unit and converted into a voice signal by a microphone element. The bone conduction microphone is not limited to the one inserted into the ear canal, but vibration of any part of the bone of the head may be captured, but in the ear microphone that is formed integrally with the earphone, a single housing is used. Both the microphone element and the receiver unit have to be arranged inside.

The microphone element housed in the case of the ear microphone is generally rectangular, and the receiver unit is generally disk-shaped. The general shape of the ear microphone that houses them is as shown in FIG. In the figure, reference numeral 1 denotes a case, which is composed of an ear tip portion 2 and a main body portion 3, and the ear tip portion 2 is inserted into the ear canal.

The ear microphone has an ear tip portion 2.
Since it is used by inserting it into the ear canal, its size and weight are naturally limited. That is, when it is assumed that an adult boy uses it, the diameter dimension A of the main body 3 is 16
It is preferable that the length does not exceed mm, and the length B of the ear tip portion 2 inserted into the ear canal is about 8 to 13 mm. Further, the total size C of the ear tip portion 2 and the main body portion 3 should not exceed 28 mm because it is better that the main body portion 3 protruding from the ear canal be shorter.

Although the inside dimension of the housing 1 is limited as described above, the internal space is made as wide as possible under the conditions, and the microphone element 4 and the receiver unit 5 are arranged therein. The problem then arises in what position and in what direction the microphone element 4 and the receiver unit 5 should be placed. FIG. 4 shows an example thereof.
In this case, the microphone element 4 is placed horizontally,
About half of the front part faces the ear tip part 2 and the rear part faces the main body part 3. The receiver unit 5 is placed vertically, and is placed on the main body 3 above the microphone element 4. A hole 6 is provided in the ear tip portion 2 so that sound waves can be input and output.

In the case of such a layout, the length B of the ear tip portion 2 can be freely set, while the receiver unit 5 is vertically arranged above the microphone element 4, so that the diameter dimension A is large. Will be. In order to fit this within 16 mm described above, it is necessary to set the diameter dimension of the receiver unit 5 to about 10 mm. If the receiver unit 5 is made small in this way, the efficiency is lowered and the sound quality is also deteriorated.

Therefore, the layout is changed to the one shown in FIG. In this layout, since the receiver unit 5 is not mounted on the upper portion of the microphone element 4, the diameter dimension A can be reduced, but the length B of the ear tip portion 2 becomes long. Since the ear tip portion 2 is to be inserted into the ear canal, when this portion becomes long,
It becomes difficult to hold it in the ear canal and it easily falls.

In the meantime, since ear microphones are required to be downsized, a magnetic type receiver unit 5 is often used. In the case of the magnetic type, most of the shape is a square type, and it can be made very small, which makes it easy to use. This magnetic type is designed so that a sufficient output can be obtained in the voice band, so it is satisfactory in terms of power, but on the other hand, it has the problem of being limited in sound quality. .

There is a dynamic type receiver unit used for the inner ear type headphones. This is excellent in sound quality and has a sufficient power, but if it is used as it is for an ear microphone, since the diameter dimension is usually as large as 13 to 16 mm, the whole becomes very large. By the way, in order to obtain high sound quality, this dynamic type receiver unit needs to have the radial dimension as large as possible, whereas the height dimension can be suppressed to be small. If a layout is devised by taking advantage of this point, the dynamic type receiver unit can be used for the ear microphone.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of this point. Even when a dynamic type receiver unit having excellent sound quality is used, a sufficient size is ensured for both the microphone element and the receiver unit. It is an object of the present invention to provide an ear microphone in which the size of the housing can be kept as small as possible.

The prior art of ear microphones is as follows:
First, there is the one described in Japanese Utility Model Publication No. 54-20898. The one described in this publication uses an ear piece (ear tip portion) to be inserted into the ear canal as a vibration transmitting portion, and a vibration pickup (microphone element) is provided therein in a direction substantially perpendicular to the ear canal wall, An earphone (receiver unit) is provided inside or integrally with the earpiece. With this structure, the conversion efficiency of the vibration pickup is good, the external dimensions are not large, and the shape is good, but on the other hand,
There is a problem that the efficiency is inevitably deteriorated because the earphone having a sufficient size cannot be used.

Another example of the prior art is Japanese Patent Publication No. 63-
28558, Japanese Patent Publication No. 63-28559, Japanese Patent Publication No. 63-28560, and Japanese Patent Publication No. 63-62954.
JP, JP-B-63-62955 and JP-B-6
Although there are those described in Japanese Patent Laid-Open No. 3-62956, the microphone element and the receiver unit in each of these publications are different from those of the present invention in structure and shape, and the purpose of the invention is also different. Therefore, the above problem cannot be solved as it is.

[0013]

DISCLOSURE OF THE INVENTION The present invention is an ear microphone comprising a ear tip portion and a main body portion, and a microphone element and a receiver unit arranged inside a housing adapted to be inserted into the ear canal. In the above, the space inside the housing is formed into a shape in which a rectangular microphone element can be disposed horizontally from the main body portion to the ear tip portion, and the rear upper portion of the microphone element inside the main body portion is disc-shaped. Is formed into a shape that allows the receiver unit to be arranged in the same direction as the microphone element.

[0014]

In this way, by constructing the housing so that the microphone element and the speaker unit can be arranged in parallel in different steps, even if a relatively large receiver unit (having a diameter of about 12 to 15 mm) is used. , It is possible to obtain an ear microphone that can be set in the ear canal without any discomfort. The electrical action is no different from the conventional one.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The housing 1 is composed of an ear tip portion 2 and a main body portion 3 as in the case of FIGS. 4 and 5. The internal space S of the housing 1 is formed in a shape in which a rectangular microphone element 4 can be disposed horizontally from the main body portion 3 to the ear tip portion 2. Further, the rear upper portion of the microphone element 4 inside the main body portion 3 is formed in a shape in which the disc-shaped receiver unit 5 can be disposed horizontally. That is, the microphone element 4 and the receiver unit 5 are provided inside the housing 1.
Are arranged, they have a parallel positional relationship with different steps.

Lead wires 7 and 8 are connected to the microphone element 4 and the receiver unit 5, and a cord 9 is pulled out from the bushing 10 to the outside. The cord 10 is connected to an amplifier (not shown).

Since the receiver unit 5 is arranged horizontally, the sound emitted by the receiver unit 5 is generated in a direction intersecting the hole 6 provided in the ear tip portion 2. Therefore, a sound guide plate 11 is obliquely attached to the front part (lower part) of the receiver unit 5 so as to guide the sound toward the hole 6.

The method of connecting the microphone element 4 and the receiver unit 5 to the amplifier and the like and the method of use are the same as those of the conventional one. That is, if the ear tip portion 2 is inserted into the ear canal, held and uttered, the bone conduction vibration transmitted through the ear tip portion 2 causes
A voice current is generated in the microphone element 4 and is output to the lead wire 7. Further, if an audio current is supplied from the amplifier to the receiver unit 5 through the lead wire 8, the receiver unit 5 produces a sound. This functions as an ear microphone that simultaneously transmits and receives.

[0019]

Since the present invention is the ear microphone configured as described above, a large space can be provided for disposing the receiver unit. Therefore, it is possible to dispose a dynamic type receiver unit here, which has never been used because of its large diameter. Also in this case, the overall size can be kept small.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 taken along line XX.

FIG. 3 is a side view showing the inside of FIG. 1 from the left.

FIG. 4 is an explanatory diagram showing an example of an internal arrangement of a conventional ear microphone.

FIG. 5 is an explanatory diagram showing another example of the internal arrangement of a conventional ear microphone.

[Explanation of symbols]

 1 housing 2 ear tip part 3 main body part 4 microphone element 5 receiver unit 6 hole S internal space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoya Atsumi 1-12-17 Kamirenjaku, Mitaka City, Tokyo Atsden Co., Ltd.

Claims (1)

[Claims] 1. An ear microphone including an ear tip portion and a main body portion, wherein a microphone element and a receiver unit are arranged inside a housing in which the ear tip portion is inserted into the ear canal. Is formed into a shape in which a rectangular microphone element can be disposed horizontally from the main body portion to the ear tip portion, and the rear upper portion of the microphone element inside the main body portion is a disc-shaped receiver unit with the microphone element. An ear microphone characterized by being formed into a shape that can be arranged in the same direction.