JPH0125023Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a handset having a bone conduction microphone and a headphone at both ends of a headband.

Nowadays, hands-free voice-controlled transceivers are used to communicate with multiple people at distant locations in group activities at construction sites, workplaces, and schools, and are also used in foreign language learning devices. In this system, a handset with a headphone and a microphone attached to a headband is used to have a conversation with a teacher of a particular learner through a parent device and a slave device.

FIG. 1 is an explanatory diagram of the use of such a conventional handset. Reference numeral 1 denotes a headband, which is configured to be held on the head by its own elastic force. A headphone 2 with a speaker is attached to one end of the headband 1 so as to cover the ears. A bar 4 having a microphone 3 attached to its tip is pivotally supported on the headband 1 on the opposite side of the headphone 2.

However, in such a conventional handset, all external noise existing in the external environment is input to the microphone 3 along with the voice emitted from the mouth, and as a result, on the side receiving this voice input, the noise You will hear a voice that is difficult to hear mixed with.

For this reason, for example, at work sites where industrial machinery and civil engineering machinery are in operation, such handsets cannot function satisfactorily for business-related conversations.

Further, in the voice control type transceiver, the above-mentioned noise causes problems such as erroneous control of switching between transmitting and receiving, making it impossible to make a telephone call. In other words, in handsets and receivers capable of transmitting and receiving calls, there has been a problem in that the voice-to-noise ratio on the transmitter side is reduced, making it impossible to receive calls.

On the other hand, in response to this, a bone conduction type microphone as shown in FIG. 2 has been provided. This is an inserter 1 whose one end is inserted into the external ear canal and receives sound vibrations from the external auditory canal that are transmitted from the mouth through the bone tissue.
1, a holding member 13 fixed in the covering member 12, and a piezoelectric element 14 having one end fixed to the holding member 13 and the other end protruding into the inserter 11. and a lead wire 15 for deriving the polarization voltage of the piezoelectric element 14.

According to this, the bone vibration of the outer ear that occurs when making a sound is transmitted to the piezoelectric element 14, and the lead wire
5, a polarized voltage can be obtained through an amplifier, etc., and this voltage can be reproduced as sound again through an amplifier, etc., and after performing necessary sound quality corrections, it can be output to earphones or headphones for listening. Therefore, external noise is not input to this bone conduction microphone together with the audio signal, and only clear audio can be heard.

By the way, when such an earplug-type bone conduction microphone is assembled into a handset together with a headphone as described above, the headphone and bone conduction microphone will block the left and right ear holes, respectively, which is difficult to do at a construction site, etc. When used, external noise and other on-site work noises cannot directly enter the ears, which is extremely dangerous.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a handset and receiver that allows a user to have a clear conversation without blocking both ears and without being bothered by external noise. purpose.

In order to achieve this objective, the present invention attaches a headphone to one end of the headband, and attaches a headphone to the other end of the headband, which is attached to the temporal region behind the ear, which is called the temporal mastoid process or the lower border of the temporal bone (the same applies hereinafter). The structure is such that a bone conduction microphone that comes into contact with it is attached.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 3 is a perspective view showing the entire handset 21 of the present invention. In the figure, reference numeral 22 denotes a headband made of an elastic material, and holding members 23 made of synthetic resin or the like are attached to both ends of this headband.
, a sliding rod 25 integral with the headphone 24 is slidably held in the mounting hole with a certain contact resistance, and a holding member 23 at the other end of the headband 22
There is a sliding rod 2 integrated into the bone conduction microphone 26.
7 is slidably held within the mounting hole with a certain contact resistance. The bone conduction microphone 26 also has a locking piece 28 that can be hooked onto the upper part of the ear.
is installed protrudingly.

Note that when the handset 21 has its headband 22 hung on the head and the headphone 24 is placed against one ear, the bone conduction microphone 26
is designed to come into contact with the temporal region behind the ear,
In order to accurately and stably fix the bone conduction microphone to the temporal region, the locking piece 28 is locked to the upper part of the ear.

Further, the bone conduction type microphone 26 has a configuration as shown in FIG. 4. In the same figure, 3
Reference numeral 1 denotes a synthetic resin housing having a U-shaped cross section. A flexible diaphragm 32 is stretched inside the housing 31 so as to close the opening of the diaphragm 32. A piezoelectric element 33 that causes distortion in the crystal due to these vibrations is attached to one side. Note that this piezoelectric element 33 is polarized by the generation of the strain, and a polarization voltage can be taken out from the diaphragm 32 and the piezoelectric element 33 via the lead wire 34.

Reference numeral 35 denotes a patch plate with a tip 36 fixed to the other side surface of the diaphragm 32, and one side surface 35a of this patch plate 35
It is curved and configured to fit closely to the temporal region behind the ear.

In such a bone conduction microphone 26, the sound generated by a person's mouth is transmitted to the temporal bone structure as vibrations, so these vibrations are transmitted to the diaphragm 32 via the contact plate 35 that is in contact with the temporal region. is transmitted with high sensitivity. Therefore, the crystal of the piezoelectric element 33 is distorted in response to the vibration of the diaphragm 32, and a polarization voltage corresponding to this distortion is outputted via the lead wire 34. Further, this output voltage is amplified and input directly or wirelessly to another handset, so that the headphone can output audio free of external noise.

Thus, in the above-described handset having the bone conduction microphone 26 for speaking and the headphone 24 for receiving at both ends of the headband 21, when having a conversation with another person, one ear is always used without blocking both ears. Since the ears are open so that external sounds can be heard, it is possible to distinguish between the operating sounds of civil engineering machinery, etc., and the dangers at construction sites, etc. that would otherwise occur when both ears are covered can be avoided. .

As explained above, according to the present invention, a headphone is attached to one end of the headband, and
By attaching a bone conduction microphone to the other end that can touch the temporal region of the head, it is possible to safely send and receive conversations without blocking both ears.
It is possible to clearly distinguish between transmitted and received voices.
Additionally, external voices and noise can be heard through the other unobstructed ear, providing the practical advantage of allowing normal conversation with others who do not have similar devices. .

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the use of a conventional electroacoustic transducer.
Figure 2 is a cross-sectional view of a conventional bone conduction microphone.
Figure 3 is a perspective view of the electroacoustic transducer of the present invention;
The figure is also a cross-sectional view of the bone conduction microphone. 22...Headband, 24...Headphone,
26... Bone conduction microphone, 28... Locking piece.

Claims (1)

[Scope of utility model registration request] A handset with a headphone attached to one end of the headband and a bone conduction microphone that touches the side of the head at the other end.