JPS5843342Y2 - Vibration pickup type ear microphone - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a vibration pickup type ear microphone.

More specifically, the lead wire that draws the output current of the vibration pickup element attached to the ear canal to the outside picks up external noise (particularly noise caused by the lead wire rubbing against other objects and receiving mechanical vibrations) outside the drawer. This invention relates to a vibration pickup type ear microphone which prevents noise from occurring and also allows one ear to receive calls at the same time by using the buffer body itself as a member for preventing external noise pickup of such a lead wire.

Conventionally, for this type of ear microphone.

Special Publication No. 53-39763 proposed by one of the inventors of this invention.

Publication No. 53-44421 and No. 53-44422.

Publications No. 53-44423 and No. 53-44426, as well as Special Publication No. 53-39764 - Publication No. 52
-No. 19543, No. 53-44424 No. 53-444
As described in publications such as No. 25 and No. 53-44429, the output current of a vibration pickup element that is attached to the external auditory canal and picks up the wearer's own bone conduction sound signal transmitted to the external auditory canal wall is transmitted to the outside through a lead wire. The extraction technique is known.

Also, one of the inventors of the present invention also proposed the
As described in Japanese Patent No. 9607 and Japanese Utility Model Publication No. 52-19544, a technique is also known in which an air passage is provided in the ear microphone so as to communicate with the inside and outside of the external auditory canal.

Furthermore, one of the inventors of this invention also proposed the
As described in Publications No. 121409 and No. 52-40614, as well as Japanese Utility Model Publication No. 53-44428, the air passage is connected to the sound path (for example, a rubber tube) of an air conduction type speaker, and one ear is connected to the air passage. There is a known technology that allows users to receive and receive calls at the same time.

However, in these conventional vibration pickup ear microphones, the lead wire that draws the output current of the vibration pickup element attached to the ear canal to the outside remains as it is (usually made of an insulator such as vinyl or other soft synthetic resin). When the ear microphone is worn, the lead wire comes into contact with the wearer's body, clothing, or other objects and is exposed to mechanical vibrations, which can cause the ear microphone to generate noise. There was a drawback to picking up.

In particular, the above-mentioned Utility Model Publication No. 51121409 and Utility Model Publication No. 53
When adding a rubber tube for the receiving sound path, etc. as described in each publication of No. 44428, there is a noticeable drawback that the lead wire and the rubber tube for the sound path rub against each other, causing the vibration pickup element to pick up noise. It was seen.

One of the major features of vibration pickup type ear microphones is that unlike ordinary microphones, which convert vibrations from the vocal cords into electrical signals, even when there is external noise,
The point is that clear voice detection can be performed by picking up only the bone conduction sound signal of the wearer without picking up such external noise (or air conduction noise), but as mentioned above, the lead wire is If the vibration pick-up element picks up noise by receiving target vibration.

The characteristics of the ear microphone will be canceled out.

Another feature of the vibrating hook-up ear microphone is that it is attached to the ear canal, allowing the wearer to move freely. The point is that it can be used even by those who perform other types of work.

When such a worker engages in work while wearing a conventional ear microphone, the lead wire is also subjected to mechanical vibrations quite frequently, making clear voice detection difficult.

Furthermore, one of the characteristics of the vibration pickup type ear microphone is that it is attached to the external auditory canal of the ear, which is originally responsible for hearing official voices, but as mentioned above, the mechanical vibration transmission of the lead wire causes If the i5's drawback is that the vibration pickup element makes noise, the person wearing the ear microphone will also hear this noise, not to mention the discomfort.

When receiving calls at the same time with one ear, this noise becomes a hindrance to receiving calls, leading to a serious drawback in that the intended purpose cannot be achieved.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vibrating pink-up type ear microphone that can eliminate the above-mentioned drawbacks of the conventional vibrating pick-amp type ear microphone.

Another purpose of the present invention is to create a vibration pickup type microphone that can receive tensile external force, not only when the lead wires are in contact with each other, but also so that the vibration pickup element does not receive noise due to this. It is to provide.

One idea will be explained in detail below.

In the vibration pickup type ear microphone to which the present invention can be applied, the ear microphone portion may be any conventionally known type.

For example, to explain based on the ear microphone shown in FIG. 1, a vibration pickup element 1 that is attached to the ear canal and picks up the wearer's own bone conduction sound signal transmitted to the ear canal wall, The earpiece body 3 includes a sensing section 2 for sensing signals.

The earpiece body 3 is provided with an air passage 4 that communicates with the inside and outside of the ear canal, and a lead wire 5 that draws out the output current of the vibration pickup element 1 to the outside.

This is a vibration pickup type ear microphone that is pulled out of the earpiece body 3.

still. In FIG. 1, 6 indicates a weight fixed to one end of the element 1, and 7 indicates a stator supporting the other end of the element 1.

Therefore, in one embodiment of the present invention, a shock absorber 9 of a desired length having a continuous cavity 8 is connected to a main body 3 (for example, its lid 10
) etc., the cavity 8 is made to communicate with the air passage 4i/i, the lead wire 5 is enclosed in the buffer body 9 leaving the cavity 3, and the open end of the buffer body 9 is connected to the air passage 4i/i. Speaker (wrapping earphones).

), the first feature is that the cavity 8 is used as a sound path.

In order to make the hollow part 8 of the buffer body 9 communicate with the air passage 4, for example, as shown in FIG. The air passage 4 and the cavity 8 may communicate with each other through this space G, or by directly connecting one passage 4 to the cavity 8 as shown by the chain line in FIG. Alternatively, one or more (for example, four at regular intervals) air passages may be provided on the front side of the ampullae so that the received sound from the outer periphery of the main body 3 inserted into the external auditory canal can be communicated. (See FIG. 6 of Japanese Utility Model Application Publication No. 55127489).

Other techniques may also be employed, such as disposing the buffer body 9 up to the most extreme part of the main body 3, as shown in the above-mentioned Japanese Utility Model Publication No. 53-44428.

Further, as a specific example of enclosing the lead wire 5 in the buffer body 9 leaving the cavity 8, the following configuration can be cited.

For example, as shown in FIG. 2, a conductor wire 11 connected to the vibration pickup element 1 and an external conductor wire 12 are connected to an insulator 13.
As shown in FIG. ′
(In this case, if the buffer body 9 is made of an insulator, the outer insulator 13 can be omitted.

). Further, as shown in FIG. 4, the conductor wire 11 may be disposed in the cavity 8, and the outer conductor wire 12 may be enclosed in the interior 9' of the buffer body 9, or in the specific example shown in FIG. The portion may also be enclosed within the buffer body 9 (not shown) as in the specific example shown in FIG.

The second feature of the present invention is that the shock absorber 9 containing the lead wire 5 is fixed to the lower surface of the enlarged part of the earpiece body 3, and the operating direction of the vibration pickup element 1 (element 1 is a piezoelectric element) In this case, the direction in which the piezo effect occurs favorably is not to be arranged in the vertical direction as shown in Fig. 1, but to be arranged in the horizontal direction (Fig. 5).
(see figure).

By arranging it in this way, even if the buffer body 9 containing the lead wire receives a tensile external force, the direction of the tensile external force is the direction in which the element 1 is inoperative (if the element 1 is a piezoelectric element, the direction in which it is difficult to produce a piezo effect). ).

The element 1 becomes difficult to pick up noise caused by the external tensile force.

Furthermore, the buffer body 9 having the cavity 8 used in the present invention is made of a flexible material that is difficult to transmit mechanical vibrations, specifically, silicone resin or other soft synthetic resin, natural or synthetic. It is made of rubber, etc.

The action of the vibration pickup type ear microphone according to the present invention is that, like conventional ear microphones, the vibration pickup element 1 picks up the wearer's own bone conduction sound signal transmitted to the wall of the external auditory canal, and leads the output current of this element 1. It can be taken out to the outside via the wire 5, and by connecting the open end of the buffer body 9 to a speaker, it is possible to simultaneously receive calls through the air passage 4 (or 4') using the cavity 8 as a sound path.

In this case, even if the shock absorber 9 comes into contact with or rubs against another object, the lead wire connected to the vibration pickup element 1 can be prevented from receiving mechanical vibration, so that the vibration pickup element 1 can absorb the external noise. I won't pick it up.

Further, even if the buffer body 9 is stretched, it has the effect of making it difficult to pick up noise as described above.

According to the present invention, in a conventionally known vibration pickup type ear microphone, a buffer body having a desired length and having a continuous hollow portion is communicated with an air passage leading to the inside and outside of the external auditory canal, and the buffer body is provided with the above-mentioned hollow portion. Since the output current of the vibration pickup element is enclosed in an appropriate length of lead wire that is drawn out to the outside, the length of the lead wire that is drawn out in a so-called naked state can be minimized to the necessary minimum, and the ear microphone When worn, the lead wire can be prevented from receiving mechanical vibration due to rubbing against the wearer's body, clothes, or other objects, and this can prevent the vibration pickup element from picking up external noise. Since the lead wire is enclosed in a shock absorber that also includes a sound path, it is possible to prevent the lead wire from coming into contact with the sound path tube, which was seen in conventional ear microphones used for transmitting and receiving calls. Because the vibration pickup element does not pick up noise.

It has the effect of eliminating the discomfort caused by the wearer's own noise, and also being able to hear clearly when receiving and receiving calls.It also eliminates the need for lead wires, which were conventionally separated into two, and the conventional sound pipe in ear microphones used for sending and receiving calls. Since the lead wires are combined into one wire, their handling becomes easy, and the shock absorber containing the lead wires is fixed to the lower surface of the enlarged part of the earpiece body, and the operating direction of the vibration pickup element is oriented in the left-right direction. Therefore, even if the buffer receives an external tensile force, it is difficult to pick up the noise caused by this. Noise pickup can be prevented whether due to contact or tension.

It also provides benefits such as allowing workers at construction sites and coal mining sites to send and receive calls with clear audio.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a vibration pickup type ear microphone according to the present invention (excluding the pull-out configuration of the lead wire-encased buffer and the arrangement of the pickup element), and Fig. 2 is a cross-sectional view taken along the line ■-■ in the same figure. . FIGS. 3 and 4 are sectional views showing other embodiments of the means for enclosing the lead wires in the buffer, and FIG. 5 is a sectional view showing the structure of the present invention including the drawing structure of the buffer containing the lead wire and the arrangement of the pickup element. FIG. 2 is a partially cutaway front view of an ear microphone configured as shown in FIG.

Claims (1)

[Scope of Claim for Utility Model Registration] The output current of a vibration pickup element that is attached to the ear canal and pinks up the wearer's own bone conduction sound signal transmitted to the ear canal wall is drawn out through a lead wire, and
In a vibration pickup type ear microphone having an air passage communicating with the inside and outside of the ear canal, a buffer body having a desired length and having a continuous cavity is communicated with the air passage directly or indirectly through a space chamber, and the buffer body Leave the above hollow part and enclose the above lead wire to an appropriate length. Further, the hollow portion is used as a sound path of an air conduction type speaker. A vibration pickup type ear microphone further comprising: the lead wire-containing buffer body being fixed to the lower surface side of the enlarged portion of the earpiece body, and arranged so that the vibration pickup element operates in the left-right direction.