JPS6223957B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration pickup type ear microphone for single-ear transmission and reception, and in particular, to a vibration pickup type ear microphone built into the ear microphone body to pick up bone conduction audio signals from the wall of the external auditory canal. The present invention relates to an improvement in a vibrating pickup type ear microphone for one-ear transmission and reception, which has a reception system that introduces air-conducted sound from the outside into the microphone body through a sound conduit.

When the ear microphone is configured for one-ear transmission and reception, it is necessary to provide the ear microphone main body with a sound guide for guiding air-conducted sound from the reception system to the eardrum. Prior art related to this point is Utility Model Publication Nos. 53-49607, 54-17385, and 55-25577.
No. 55-179483, etc., there is a technology for passing air conduction sound into the storage space of a vibrating pickup, and a technology for transmitting sound that is separate from and independent of the storage space of a vibrating pickup. This technology is broadly divided into two types: forming a sound guide hole and passing air-conducting sound through the sound guide hole. Compared to the former, the latter has different vibration systems for both the transmitting and receiving systems, so it has the advantage of being less likely to cause the housing phenomenon. However, forming the sound guide hole is not only extremely difficult in manufacturing, but also has drawbacks such as the small diameter of the sound guide hole, which makes it easily clogged by earwax, etc. .

On the other hand, regardless of the type of vibration pickup used in an ear microphone, it is important that it be extremely small and precisely manufactured so that it can be installed within the ear canal. However, with the structure of the conventional vibrating pickup type ear microphone, the vibrating pickup is susceptible to various external shocks, etc., and as the protection is insufficient, the vibrating pickup performance may fluctuate, or in extreme cases, it may be damaged. There is a risk that

The present inventors have completed the following invention as a technique for solving the above-mentioned drawbacks and inconveniences.

In other words, there is a transmitting system that picks up bone-conducted sound signals from the ear canal wall using a vibration pickup built into the ear microphone body, and a receiving system that introduces air-conducted sound from the outside into the microphone body through a sound conduit. A vibrating pickup type ear microphone for single-ear transmission and reception, wherein the vibrating pickup is built into a protruding portion on the front side of the ear microphone body, and an adapter that contacts the wall of the ear canal and has a sound output hole at the tip portion. However, on the front side of the ear microphone body,
A one-ear type transmission, characterized in that a space is formed between the protruding portion and the outer circumferential surface thereof, and an acoustic outlet of the sound conduit is communicated directly or indirectly with the space. He came to invent a vibrating pickup-type ear microphone for receiving calls.

The present inventors continued their research on technology for processing air-conducted sound introduced from the sound pipe of the receiving system in a single-ear type ear microphone for transmitting and receiving speech with such a configuration, and as a result, they were able to complete the present invention. .

That is, an object of the present invention is to provide a vibrating pickup type ear microphone for single-ear transmission and reception, which eliminates the drawbacks and inconveniences of the prior art, and at the same time provides voice reception with high syllable clarity. . Other objects of the invention will become apparent from the following description of the specification.

According to a preferred embodiment of the present invention, the configuration is as follows. That is, (A) a vibrating pickup element that picks up bone conduction audio signals, (B) a lead wire connected to the vibrating pickup element via an impedance conversion semiconductor, and (C) guiding air conduction sound from an external speaker. A space is formed between the ear microphone body to which the sound conduit is attached, an adapter having a sound exit hole at the tip and attached to the ear canal, and the outer peripheral surface of the protruding part of the body having a built-in vibrating pickup element. A vibrating pickup type ear microphone that is detachably attached to the front side of the main body and communicated so that the air conduction sound of the receiving system coming out from the outlet of the sound conduit reaches the space directly or indirectly, A through hole is provided in a portion of the adapter that communicates with the outside of the ear canal, for example, in the rear side.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

In the embodiment shown in FIG. 1, a vibrating pickup element 1 that picks up the wearer's own bone conduction audio signal to be transmitted to the ear canal is inserted into a protruding portion 3 of an ear microphone body 2 with a space g ₁ therebetween. 4, a printed circuit board 5 provided with an impedance conversion semiconductor (not shown) is fixed to the stator 4, a through hole 6 is provided in the front part of the main body 2, and a lid 7 is provided in the rear part of the main body 2. installed.

The adapter 8 is removably attached to the front side of the main body 2 with a space g ₂ formed between it and the outer peripheral surface of the protruding portion 3 of the main body 2, and a sound output hole 9 is provided at the tip of the adapter 8. ing.

One end (not shown) of the sound pipe 10 is connected to an external speaker (not shown), and the other end 11 is connected to the main body 2.
The outlet 12 of the flexible sound conduit 10 is inserted into the lower part of the
is connected to the internal space G of the main body 2.

Further, the flexible tube 14 containing the lead wires 13a, 13b is inserted into the main body 2, and the lead wires 13a, 13b are inserted into the main body 2.
13b is connected to the vibration pickup element 1 via an impedance converting semiconductor.

The embodiment shown in FIG. 2 has almost the same construction as the previous embodiment, but the other end 11 of the sound pipe 10 is fixed to the front part of the main body 2, and the outlet 12 of the sound pipe 10 is connected to the space _g2. We are in direct contact.

However, in the above two embodiments, when the adapter 8 is inserted into the external auditory canal 15 and attached in close contact with the external auditory canal wall, two through holes 16 are formed on the side of the adapter 8 located behind the contact point. are located concentrically.

The adapter used in the present invention may be made of polyethylene, noryl resin, silicone rubber, polypropylene, ABS resin, metal, or the like. The shape of this adapter is not limited to the one shown in the figure, but the entire ear canal attachment part is tapered, the entire ear canal attachment part is cylindrical or cylindrical, and the tip is approximately spherical or semicircular. Various shapes can be used.

The ear microphone according to the present invention is worn by inserting the adapter 8 into the ear canal 15 and bringing at least a portion of it into close contact with the wall of the ear canal. Bone conduction audio signals transmitted to the wearer's own external auditory canal wall are picked up by the vibrating pickup element 1, and the output current is taken out to the outside via lead wires 13a, 13b and can be transmitted.

The sound transmitted from the speaker passes through the sound conduit 10, and in the embodiment shown in FIG.
, and enters the space g ₂ through the through hole 6, and in the embodiment shown in FIG.
g ₂ , and from the sound output hole 9 of the adapter 8 to the ear canal 1
5 and reaches the eardrum and can receive the call. At this time, the space g ₂
Since this also leads to the outside of the ear canal, some of the received sound will leak.

Note that the adapter 8 can have one or more sound output holes 9, and if earwax or the like gets into the sound output hole 9 when it is attached to the ear canal, remove the adapter 8 from the main body 2 and remove the earwax or the like. be able to.

Since the present invention has the above-described structure and operation, it can exhibit the following effects.

[] The present invention has one on the rear side of the adapter.
One or more holes can be provided, and the syllable intelligibility is determined, for example, when two holes are provided on the side (the ratio of the area of the sound exit hole at the tip to the total area of the holes on the side is 18:1) is approximately 90%, and when four through holes are provided on the side (the ratio of the area of the sound exit hole at the tip to the total area of the through holes on the side is 9:1), it is approximately 89%. . However, when the sound exit hole is provided only at the tip of the adapter, the syllable intelligibility is approximately 85%.

[] The vibrating pick-up element is built into the protruding part of the main body, and the adapter can protect that part by enclosing it, which prevents earwax from adhering to the vibrating pick-up element and causing changes in its performance. Of course, the impact resistance of the vibration pickup is also improved.

[] A space is formed between the adapter and the protruding portion of the main body, and the space communicates with the outlet of the sound pipe, so that the sound from the speaker comes out from the exit of the sound pipe and enters the adapter through the space. The sound exits from the hole and reaches the eardrum, allowing the user to receive the call. The microphone can be further downsized and productivity can be improved.

[] Unlike conventional sound guide holes, the sound guide
Since it is formed as a space between the adapter and the outer peripheral surface of the protruding portion of the main body, the sound conduction (space) is unlikely to be blocked by earwax or the like.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of ear microphones showing different embodiments of the present invention. In the figure, 1 is a vibration pickup, 2 is an ear microphone body, 3 is a protruding part, 8 is an adapter, 9 is a sound exit hole, 10 is a sound conduit, 16 is a through hole,
g ₁ , g ₂ , and G each indicate space.

Claims (1)

[Claims] 1. It has a transmitting system that picks up bone conduction sound signals from the wall of the ear canal using a vibration pickup built into the ear microphone body, and a receiving system that introduces air conduction sound from the outside into the microphone body through a sound conduit. , a vibrating pick-up type ear microphone for single-ear transmission and reception, wherein the vibrating pick-up is built into a protruding portion on the front side of the ear microphone body, and an adapter that contacts the wall of the external auditory canal and has a sound output hole at the tip portion is provided. , a space is provided on the front side of the ear microphone main body to form a space between the outer circumferential surface of the protruding portion, and the acoustic outlet of the sound pipe is communicated directly or indirectly with the space; A vibrating pick-up type ear microphone for one-ear transmission and reception, further characterized in that the space is communicated with a through hole communicating with the outside of the ear canal.