JP2008178051A - Piezoelectric-type bone conduction receiver and bone conduction communicating system using the receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and compact piezoelectric-type bone conduction receiver having simplicity of the whole configuration, a small number of components, and a simple form and used for getting necessary given oscillation and taking out outside, and to provide a bone conduction communicating system that uses this receiver. <P>SOLUTION: The piezoelectric type bone conduction receiver for directly transmitting sound, or the like, as oscillation directly to a wearing person's bone of his/her head through a piezoelectric vibrator 14 arranged in the inside a sealed case 10 is constituted by: forming a thin edge portion 13 along a circumferential direction at a contact face 11a of the sealed case; arranging the piezoelectric vibrator on the inner side of the contacted face surrounded by the edge portion, in a state where the center of the piezoelectric vibrator is supported; and mounting variety weights 16 and 16 at mutually facing portions of the piezoelectric vibrator. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a piezoelectric bone conduction receiver capable of listening to voice and the like by bone conduction and a bone conduction communication system using the piezoelectric bone conduction receiver.

  In recent years, it has attracted attention to adopt a bone conduction receiver that can hear voice and the like in an environment with a high noise level. In addition, this type of bone conduction receiver can hear sound by transmitting vibration to the bones of the head, and therefore has the advantage of preventing the diffusion of sound to the surroundings. Is known (see, for example, Patent Document 1 and Patent Document 2).

  JP-A-2005-151183   JP 2006-148295 A

  However, all of the conventionally known bone conduction receivers have their merits and demerits, and those that can satisfy all of the structural surface, the shape surface, and the performance surface have not yet been proposed. For example, in terms of structure, it is desired that the configuration is simple and the number of components constituting the bone conduction receiver is minimal. Further, in terms of shape, it is desired to have a small and compact configuration and a simple shape. Further, in terms of performance, it is desired that a required vibration for transmitting sound or the like can be obtained, and that the vibration can be taken out in a required state.

  In addition, such a bone conduction receiver is often used in a communication system that performs transmission / reception of a mobile phone or the like. However, even in configuring such a communication system, the required performance can be achieved with a configuration that is as simple as possible. It is hoped to get.

  The present invention has been made in view of such circumstances, and the overall configuration is simple, the number of components is small, the shape is simple, the size and size can be reduced, and the required vibration is required. It is an object of the present invention to obtain a piezoelectric bone conduction receiver capable of exhibiting a function as a bone conduction receiver by taking out the outside and obtaining a bone conduction communication system using the piezoelectric bone conduction receiver. To do.

  In order to meet such an object, the piezoelectric bone conduction receiver according to the present invention (the invention according to claim 1) is configured such that a voice or the like is vibrated by a piezoelectric vibrator disposed in a sealed case, and the bone of the head of the wearer. Piezoelectric bone conduction receiver for direct transmission to the contact surface of the sealing case, a thin edge portion is formed in the circumferential direction on the contact surface, and the inside of the contact surface surrounded by the thin edge portion Is characterized in that the piezoelectric vibrator is disposed in a state where the center is supported, and deformed weights are mounted on the opposing peripheral portions of the piezoelectric vibrator.

  A piezoelectric bone conduction receiver according to the present invention (invention described in claim 2) is characterized in that in the piezoelectric bone conduction receiver according to claim 1, the piezoelectric vibrator is formed in an irregular shape.

  A bone conduction communication system using a piezoelectric bone conduction receiver according to the present invention (invention according to claim 3) is provided with the piezoelectric bone conduction receiver according to claim 1 or 2 inside a helmet. A microphone is provided on the chin strap, and a communication terminal is connected to an interface to which the piezoelectric bone conduction receiver and the microphone are connected.

  The bone conduction communication system using the piezoelectric bone conduction receiver according to the present invention (the invention according to claim 4) is the bone conduction communication system according to claim 3, wherein a piezoelectric bone conduction microphone is used as a microphone. Features.

  As described above, according to the piezoelectric bone conduction receiver according to the present invention, the piezoelectric vibrator is provided in the sealed case, and the vibration energy can be extracted from one direction or a plurality of directions. The structure is simple, and the overall size and size can be reduced, and various excellent effects such as the ability to take out the required vibration of the piezoelectric vibrator properly and reliably and exhibit the performance as a bone conduction receiver. There is.

  In addition, according to the piezoelectric bone conduction receiver of the present invention, the center-mounted type piezoelectric vibrator for concentrating the vibration energy in a certain direction, and the vibration frequency characteristics are modified for wide band and high efficiency. Since the structure has a weight or a deformation damper, the required vibration can be obtained appropriately and reliably.

  Furthermore, according to the piezoelectric bone conduction receiver according to the present invention, the electrode plate of the piezoelectric vibrator or the piezoelectric ceramic is formed in a different shape, so that it is possible to further increase the bandwidth of the piezoelectric vibrator. There is also.

  Further, according to the piezoelectric bone conduction receiver according to the present invention, in the case where the piezoelectric vibrator is provided, since the edge-shaped depression is provided in the direction in which the vibration is extracted from the piezoelectric vibrator, the piezoelectric vibration is provided. There is also an advantage that vibrations from the child can be taken out properly, reliably and efficiently.

  Furthermore, according to the bone conduction communication system using the piezoelectric bone conduction receiver according to the present invention, the piezoelectric bone conduction receiver having the above-described effects is mounted on a helmet, and this is attached to a mobile phone terminal or a piezoelectric bone conduction microphone. In spite of being a simple configuration, it is possible to obtain a communication system that can transmit and receive even in a high noise level environment and can be effective at construction sites, etc., even though it is a simple configuration. .

1 to 3 show an embodiment of a piezoelectric bone conduction receiver and a bone conduction communication system using the same according to the present invention.
In these drawings, first, an outline of the bone conduction communication system 1 shown in FIG. 3 will be described below.

  In other words, the bone conduction communication system 1 includes a piezoelectric bone conduction receiver 2 that characterizes the present invention, a piezoelectric microphone 3, an interface 4, and a mobile phone terminal 5 connected thereto. Note that the interface 4 is connected to the piezoelectric bone conduction receiver 2 and the piezoelectric microphone 3 described above, and serves to connect the mobile phone terminal 5 to these. Here, it goes without saying that the mobile phone terminal 5 may be a wireless device, a PHS, or the like.

  According to the bone conduction communication system 1 according to the present invention, the piezoelectric bone conduction receiver 2 is located inside the helmet 6 and can transmit the vibration of sound directly from the wearer's skull to the inner ear without going through the eardrum. Are attached by appropriate assembling means. The piezoelectric microphone 3 is attached to a part of the chin strap 7 of the helmet 6 with a magic tape or the like at a position where vibration of the wearer's voice can be picked up.

  When the piezoelectric bone conduction receiver 2 and the piezoelectric microphone 3 are assembled to the helmet 6 as described above, the bone conduction communication system is easy to handle and safe for an operator working in a noisy site such as a construction site. 1 can be obtained.

  Now, according to the present invention, in the bone conduction communication system 1 having the above-described configuration, the piezoelectric bone conduction receiver 2 for directly transmitting sound or the like as vibration to the bone is shown in FIGS. It is characterized by the configuration as shown in (a) and (b).

  More specifically, the sealing case denoted by reference numeral 10 in FIG. 2 is composed of a substantially cup-shaped resin case body 11 and a resin cover 12 that closes the opening thereof, and has a thin disk shape as a whole. It is configured. Here, the case body 11 and the cover 12 are sealed by welding or other joining means so that the sealing case 10 has a waterproof or dustproof structure.

  The surface 11a of the case main body 11 is a contact surface that comes into contact with the head of the wearer, and a thin edge portion 13 is formed on the entire periphery of the case main body 11, and a center surrounded by the edge portion 13 is formed. The vibration can be transmitted to the wearer's head as the part vibrates.

  An inner boss portion 11b is provided inside the case main body 11, and a piezoelectric vibrator 14 as a vibration source is supported as a center mounting type in this portion. The piezoelectric vibrator 14 is composed of a ceramic electrode plate, and is fixed with a nut 14 in a state where a center hole is inserted into the inner boss portion 11b described above. In FIG. 1, reference numeral 18 denotes a lead wire connected to the piezoelectric vibrator 14, and 19 denotes a cord, so that an audio signal is input to the piezoelectric vibrator 14 from the outside.

  According to such a configuration, vibration energy generated by the piezoelectric vibrator 14 in the sealed case 10 can be taken out from one direction or a plurality of directions. Therefore, the required vibration of the piezoelectric vibrator can be taken out appropriately and reliably. The performance as a bone conduction receiver can be exhibited.

  Here, the piezoelectric vibrator 14 is formed in a shape as shown in FIG. 1B by notching the top and bottom of the opposing peripheral portions in a member having a substantially disk shape as a whole. Further, deformation weights 16 and 16 are mounted on the left and right sides of the peripheral portion of the piezoelectric vibrator 14. In this embodiment, in a state in which an annular weight is mounted on the peripheral portion of the disk-shaped piezoelectric vibrator, the opposing peripheral portions are configured to be cut out by parallel lines. The shape of the deformed weights 16 and 16 is not limited to this, and it is free to form in an appropriate shape. In short, any shape can be used as long as a predetermined weight can be applied to both sides of the piezoelectric vibrator 15.

  According to the piezoelectric vibrator 14 having such deformed weights 16, 16, the vibration frequency characteristics can be broadened and widened to the center-mounted piezoelectric vibrator 14 for concentrating the vibration energy in a certain direction. Since the structure has the deformed weights 16 for increasing efficiency, the required vibration can be obtained appropriately and reliably. Here, instead of the above-described deformed weights 16, 16, a deformation damper made of rubber or the like having a damping action or the like may be provided.

  In the above-described embodiment, the case where the piezoelectric vibrator 14 and the deformed weights 16 and 16 are configured to have a different shape by cutting off the peripheral portions facing each other in a circular shape has been described. As shown in FIG. 4A, the piezoelectric vibrator 14 may be formed in a quadrangular shape, and deformed weights 16 and 16 may be mounted on opposite side portions thereof. Also, as shown in FIG. 4B, by mounting the deformed weights 16 and 16 on the peripheral portions facing each other of the disk-shaped piezoelectric vibrator 14, substantially the same effect as the above case, that is, It is possible to further widen the bandwidth of the piezoelectric vibrator.

  Further, in the above-described embodiment, the piezoelectric bone conduction receiver 2 incorporating the piezoelectric vibrator 14 is attached to the inside of the helmet 6 and is brought into contact with the head of the wearer. For example, as shown in FIG. In addition, as shown in FIG. 5, a mounting portion 20 may be provided to bulge and be attached directly to the wearer's head as shown in FIG.

  According to the piezoelectric bone conduction receiver 2 having the above configuration, the required vibration of the piezoelectric vibrator 14 can be appropriately taken out and the wearer's head can be properly extracted despite the fact that the overall configuration is simple, and the configuration is small and compact. It can be transmitted to the part, and the performance as a bone conduction receiver can be exhibited.

  6 (a) and 6 (b) show the bone conduction microphone 3 used in the bone conduction communication system 1 described above. In the figure, reference numeral 31 denotes a piezoelectric receiver composed of, for example, a PZT piezoelectric sensor. When a variation such as vibration pressure is received, the voice signal of the wearer can be extracted because the voltage fluctuates. The piezoelectric receiver 31 is held on the side opposite to the contact surface of the pad 32 that comes into contact with the wearer's throat, and is protected by being covered with a case 33 serving as a protective cover.

  The pad 32 has a three-point support structure (portions 32a, 32b, and 32c in the figure) for the purpose of cutting noise from the outside and reacting specifically to vibrations (contact vibrations) above a certain level. In the figure, 34 is a lead wire composed of a flexible strand for taking out the output from the piezoelectric receiver 31, 35 is an output shield wire having an output cord 35a, and 36 is subjected to strong vibration (shock) or the like. This is an excessive output protection resistor to protect other equipment from high output noise.

  When the bone conduction microphone 3 having such a configuration is used, the voice of the wearer can be picked up appropriately and reliably and taken out as an output signal, and the function as a microphone can be exhibited.

  Further, according to the bone conduction communication system 1 using the piezoelectric bone conduction receiver 2 or the like having the above-described configuration, the piezoelectric bone conduction receiver 2 having the above-described effects is mounted on the inner side of the helmet 6 and is used as a mobile phone. Since it is configured to be combined with the terminal 5 and the piezoelectric bone conduction microphone 3, it can transmit and receive even in a high noise level environment despite the simple configuration, and can be effective at construction sites and the like. A communication system can be obtained.

In addition, this invention is not limited to the structure demonstrated by embodiment mentioned above, The shape, structure, etc. of each part which comprise the piezoelectric bone conduction receiver 2 and the bone conduction communication system 1 using this are suitably changed and changed. It goes without saying that it can be done.
For example, the piezoelectric bone conduction receiver 2 described above can be used as a speaker for music and radio since it can hear sound and the like through vibration by being brought into contact with the head of the wearer. It can also be attached to a headset, a pillow or the like, and can also be used as an underwater speaker.

  1 shows an embodiment of a piezoelectric bone conduction receiver according to the present invention, in which (a) is a side sectional view and (b) is a sectional view taken along line II of (a).   The piezoelectric vibrator in the piezoelectric bone conduction receiver concerning the present invention is taken out and shown, (a) is a top view and (b) is the sectional view.   It is the schematic which shows one Embodiment of the bone conduction communication system using the piezoelectric bone conduction receiver which concerns on this invention.   (A), (b) is a figure which shows the modification of the piezoelectric vibrator in the piezoelectric bone-conduction receiver based on this invention.   It is a schematic sectional drawing for demonstrating the modification of the piezoelectric bone-conduction receiver which concerns on this invention.   One Embodiment of the piezoelectric bone-conduction microphone used for the bone conduction communication system which concerns on this invention is shown, (a) is a schematic sectional drawing, (b) is the front view.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bone conduction communication system, 2 ... Piezoelectric bone conduction receiver, 3 ... Piezoelectric bone conduction microphone, 4 ... Interface, 5 ... Cell-phone terminal (communication terminal), 6 ... Helmet, 7 ... Jaw strap, 10 ... Sealing case 11 ... Case body, 12 ... Cover, 13 ... Edge part, 14 ... Piezoelectric vibrator, 15 ... Nut, 16 ... Deformation weight, 20 ... Mounting part.

Claims (4)

A piezoelectric bone conduction receiver for directly transmitting sound or the like as vibration to a wearer's head bone by a piezoelectric vibrator disposed in a sealed case,
On the contact surface of the sealing case, a thin edge portion is formed along the circumferential direction,
Inside the contact surface surrounded by the thin edge portion, the piezoelectric vibrator is disposed with the center supported,
A piezoelectric bone conduction receiver, wherein deformed weights are mounted on the opposing peripheral portions of the piezoelectric vibrator. The piezoelectric bone conduction receiver according to claim 1,
The piezoelectric bone conduction receiver, wherein the piezoelectric vibrator is formed in an irregular shape. The piezoelectric bone conduction receiver according to claim 1 or 2 is provided inside a helmet,
While providing a microphone on the chin strap of this helmet,
A bone conduction communication system using a piezoelectric bone conduction receiver, comprising a communication terminal connected to an interface to which the piezoelectric bone conduction receiver and a microphone are connected. In the bone conduction communication system using the piezoelectric bone conduction receiver according to claim 3,
A bone conduction communication system using a piezoelectric bone conduction receiver, wherein a piezoelectric bone conduction microphone is used as a microphone.

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