JPH0748908B2 - Ear microphone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention electrically converts a bone conduction audio signal from the external auditory canal to perform audio transmission, and mechanically converts an audio signal sent from an external receiver into mechanical vibration. The present invention relates to an ear microphone that is converted into the ear microphone and guided to the ear canal.

[Conventional technology]

Conventionally, as this type of ear microphone, the technology disclosed in, for example, Japanese Patent Publication No. 63-28557 has been publicly announced by the same applicant as the applicant of the present invention. The technique of this publication incorporates an oscillating electric conversion element such as a piezo element that detects vibration of the insert body vibrating due to bone conduction in an insert body with a large mass that is inserted into the external auditory meatus, and a sound vibration from a speaker is generated. It has a built-in sound conduit that emits a large amount of sound into the ear canal.

[Problems to be Solved by the Invention]

By the way, in the state where the ear microphone as described above is inserted in the ear canal, it is important to collect the bone conduction voice signal most efficiently in order to increase the clarity of the sound and the S / N ratio. Yes, it is also important to significantly improve the howling margin of two-way voice communication.

Then, in order to efficiently collect the bone conduction voice signal, it is necessary to crimp the insert of the ear microphone so that the insert of the ear microphone approaches the bone adjacent to the occipital region of the ear canal. However, in the conventional insert body, since the external force cannot be applied in the direction approaching the bone by the wearing method of inserting the body into the ear canal after the insertion, the bone conduction voice signal cannot be efficiently collected. Further, in the above-mentioned wearing method, there is a problem in that the wearer is detached from the ear canal when the wearer actively moves because the holding power is small at the time of wearing.

The present invention is intended to solve the above-mentioned problems, and an object thereof is to efficiently insert a bone conduction audio signal by pressing the insert body against the bone adjacent to the occipital region of the ear canal. It is an object of the present invention to provide an ear microphone that can be used, has less pressure on the ear even when used for a long period of time, and is hard to be removed when worn.

[Means for Solving the Problems]

The ear microphone of the present invention is intended to achieve the above-mentioned object, and a means thereof is an ear microphone including a part of an insert body having a vibrating electric conversion element such as a piezo element for collecting bone conduction sound from the external auditory canal. A push rod including an elastic body such as a spring incorporated in the outer body from the outer body in a state where the insertion body is inserted into the outer ear canal located in a portion protruding from the ear canal of the ear microphone. An ear microphone incorporating a mechanism for projecting the projection formed at the tip of the push rod against the auricle, and using the reaction force of the auricle to bring the insert body closer to the bone located on the occipital region of the ear canal. It is a summary.

[Action]

In the ear microphone of the present invention configured as described above, when the protrusion is projected in a state where the insertion body is inserted into the ear canal, the protrusion abuts the auricle, and the reaction force of the auricle causes the insertion body to move the insertion body. Since the bone located on the occipital region is pressed, the insert vibrates favorably due to the bone conduction vibration, and thus the vibrating-electrical conversion element efficiently converts the bone conduction vibration into an electric signal. In addition, when the protrusion is pushed with a finger at the time of attachment / detachment, the elastic body contracts and the protrusion is returned to the periphery of the outer body, so that the insertion body can be easily attached to and removed from the ear canal.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. 1 is an ear microphone, for example, Japanese Utility Model Publication No. 63-285
As disclosed in No. 57, a vibrating / electrical conversion element such as a piezo element (not shown) is inserted in the insert 1a, and a sound conduit for emitting sound from a speaker provided outside is incorporated. . An outer body 1b made of the same material as the insert body is integrally attached to a rear portion of the insert body 1a of the ear microphone 1 via an elastic body (not shown).

Reference numeral 2 is a push rod slidably inserted in the hole 1b ₁ formed in the outer body 1b, and is always biased in the protruding direction by the spring force of the spring 3 also inserted in the hole 1b ₁ . There is. The protruding portion of the push rod 2 is formed with a protrusion 2a that directly abuts when the insertion body 1a of the ear microphone 1 is inserted into the ear canal, and the hole 1b of the outer body 1b.
_The shaft portion 2b inserted in ₁ is hollow.

4 is the hole 1b ₁ in the outer body 1b of the ear microphone _1.
Perpendicular to the small hole 1b ₂ which is formed by the operation portion 4a to the stopper that is inserted to protrude the lock portion continuously to the operation unit 4a
4b is formed, and the lock portion 4b has the push rod 2
Are inserted into the shaft portion hole 2b ₁ formed 2b by tip hole 2b ₁
The push rod 2 is prevented from projecting by the spring force of the spring 3 by abutting against the wall surface of the. Further, a U-shaped spring portion 4c is formed continuously from the operating portion 4a, and this spring portion 4c is inside the hollow of the shaft portion 2b, and the operating portion 4a is moved by the spring force of the spring portion 4c. locking portion 4b is in contact with the wall surface of the hole 2b ₁ of the shaft portion 2b as well as projects from the small holes 1b _2.

When the pressing against the operating portion 4a of the stopper 4 to the spring force of the spring portion 4c, the leading end of the locking portion 4b is so displaced inside the hole 2b ₁ of the shaft portion 2b, the locking portion 4b and the hole 2b ₁ The engagement with the wall surface is released, and accordingly, the protrusion 2 projects until the lock portion 4b comes into contact with the bottom portion of the shaft portion 2b by the spring force of the spring 3.

Next, to explain the operation based on the above-described configuration, first, after inserting the insert 1a into the external auditory meatus A, rotate the entire ear microphone 1 so that the protrusion 2a of the push rod 2 contacts the auricle B. And align. As shown in FIG. 3, when the operating portion 4a of the stopper 4 is pushed in this state, the push rod 2 projects due to the spring force of the spring 3 due to the above-described operation, the projection 2a abuts the auricle, and the auricle C is located on the back of the head. Although pushed to the side, a reaction force is generated due to the structural strength of the pinna. Due to this reaction force, the ear microphone 1 rotates around the vicinity of the entrance to the external auditory meatus A, the insertion body 1a is pushed to the occipital region side of the external auditory meatus A, and the ear microphone 1 is fixed.

Here, how the output level from the vibrating-electrical conversion element changes depending on the direction in which the insert 1a is pressed in the ear canal A will be described with reference to FIGS.

In FIG. 4, the insert 1a is oriented in the direction (a) in the ear microphone 1 according to the present invention which is pressed toward the occipital region by the push rod 2 (b)-
It is determined from FIG. 5 that the detection output is larger than that when the insert 1a is mounted in the direction (d). That is, when the insert 1a is pressed toward the bone C located on the occipital region side as in the present invention, the output level from the vibrating electric conversion element is about 2 to 3 times higher than that when pressed in other directions. It turns out to be big.

[Effects of the Invention] As described above, according to the present invention, when a protrusion is made to project in a state where the insert is inserted into the ear canal, the protrusion abuts the auricle and the insert is moved by the reaction force of the auricle. Since it is pressed by the bone located on the occipital side of the ear canal, the bone-conduction vibration can be efficiently converted by the vibroelectric transducer to improve the clarity of the sound and improve the S / N ratio. Since the wear state of the wearer is good, the wearer does not come off even when the wearer actively moves, and there is an effect that there is little feeling of pressure even when worn for a long time.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the same as above, FIG. 3 is a plan view of a state of being attached to the ear canal, and FIG. , FIG. 5 is a characteristic diagram. 1 ... Ear microphone, 1a ... Insert, 1b ... Outer body, 2 ... Push rod, 2a ... Protrusion, 3 ... Spring,
4 ... Stopper.

Claims (1)

[Claims] 1. An ear microphone having a part of an insert body incorporating a vibrating / electrical conversion element such as a piezo element for collecting bone conduction sound from the external auditory meatus, wherein the external body located at a portion protruding from the external auditory meatus of the ear microphone. In a state where the insertion body is inserted into the external auditory meatus, a push rod including an elastic body such as a spring incorporated in the outer body is projected from the outer body, and a protrusion formed at the tip of the push rod is used as an auricle. Abut,
An ear microphone characterized in that a mechanism for bringing the insertion body closer to the bone located on the occipital region side of the external auditory meatus by using the reaction force of the auricle is incorporated.