JP2004173018A - Communication system for helmet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication device for helmets, which enables a user to clearly listen to conversations, music, or the like even when riding, for example, a motorcycle with a helmet on head. <P>SOLUTION: The voice of a conversation of a user wearing a helmet is received in a bone-conductive microphone 11a by bone conduction and is amplified in an amplifier 17a through a first changeover switch 15a, and the amplified voice signal is supplied to a transmitter 21a through a second changeover switch 19a and is transmitted from the transmitter 21a to another user wearing a helmet through an antenna 23a as a radio signal. Another user wearing the helmet receives the radio signal through an antenna 27b by with receiver 25b, and the radio signal is amplified in an amplifier 17b through a second changeover switch 19b and is transmitted from a bone-conductive speaker 13b through a first changeover switch 15b by bone conduction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a communication device for a helmet that is provided on a helmet that is worn on a head, communicates with the outside, receives an audio signal from the outside, and transmits it to a helmet wearer.
[0002]
[Prior art]
Even if you are wearing a helmet and riding a motorcycle, for example, you want to listen to music clearly, talk clearly with fellow passengers, or talk with people riding other motorcycles running alongside But there is a wind noise while driving, especially if the helmet covers your ears like a full face type, listening to music, Conversations between passengers are almost impossible.
[0003]
Also, if you use headphones, you can listen to music clearly with headphones even if you ride on a motorcycle wearing a helmet, but with headphones on, you will not be able to hear the siren of an ambulance or the surrounding sounds, for example, There is an obstacle in driving.
[0004]
[Patent Document 1]
JP 2001-333478 A
[0005]
[Problems to be solved by the invention]
As mentioned above, even if you are wearing a helmet and riding a motorcycle, for example, you want to listen to music clearly, to have a clear conversation between fellow passengers, or to ride another motorcycle running alongside you. There is a demand and need to talk with the person who is, but there is a wind noise while driving, especially if the helmet is covering your ears like a full face type, etc. There is a problem that it is almost difficult to listen to and talk with fellow passengers.
[0006]
Also, if you use headphones, you can listen to music clearly with headphones even if you ride on a motorcycle wearing a helmet, but with headphones on, you will not be able to hear the ambulance siren or surrounding sounds, for example, driving There is a problem that is dangerous.
[0007]
The present invention has been made in view of the above, and an object of the present invention is to provide a helmet that allows a clear conversation and a clear listening of music and the like even when riding a motorcycle, for example, while wearing a helmet. Communication device for communication.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention according to claim 1 is a communication device for a helmet provided on a helmet to be worn on a head and for making a telephone call with the outside. A bone conduction microphone that receives the signal through bone conduction and converts it into an electric signal, a bone conduction speaker that is provided on the helmet, and transmits the electric voice signal to the helmet wearer by bone conduction, and is connected to the bone conduction microphone and the bone conduction speaker. An amplifier for amplifying an electric signal from the bone conduction microphone and an electric sound signal for the bone conduction speaker, and an electric signal from the bone conduction microphone connected to the amplifier and amplified by the amplifier as a radio signal. Transmitting means for transmitting the signal to the outside; receiving the radio signal from the outside connected to the amplifier; And summarized in that and a receiving means for supplying.
[0009]
According to the first aspect of the present invention, the voice of the conversation of the helmet wearer is received and amplified by bone conduction with the bone conduction microphone, and transmitted as a wireless signal from the transmission means to another external helmet wearer. Then, receiving and amplifying the radio signal of the conversation of the other helmet wearer from the outside with the receiving means, and transmitting it by bone conduction by the bone conduction speaker, even when wearing a helmet, for example, when riding a motorcycle, Clear conversations between fellow passengers and between people riding multiple motorcycles running side by side, without wind noise while running and without helmet covering ears be able to.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, a monitoring circuit that monitors an output from the bone conduction microphone and determines whether an electric signal is output from the bone conduction microphone. If the monitoring circuit determines that an electrical signal is being output from the bone conduction microphone, the amplifier is connected to the bone conduction microphone and disconnected from the bone conduction speaker, and the amplifier is connected to the transmitting means and connected to the receiving means. If it is determined that no electrical signal is output from the bone conduction microphone, the amplifier is disconnected from the bone conduction microphone and connected to the bone conduction speaker, and the amplifier is disconnected from the transmission means and connected to the reception means. And a switch means that operates as described above.
[0011]
According to the second aspect of the present invention, the output from the bone conduction microphone is monitored, and when an electric signal is output from the bone conduction microphone, the amplifier is connected to the bone conduction microphone and the output from the bone conduction speaker. Disconnect, connect the amplifier to the transmitting means and disconnect from the receiving means, and when no electrical signal is output from the bone conduction microphone, disconnect the amplifier from the bone conduction microphone and connect to the bone conduction speaker, and connect the amplifier from the transmission means. Since it is disconnected and connected to the receiving means, the switching operation can be performed automatically each time the conversation is performed, and the conversation can be smoothly performed without any troublesome switching operation.
[0012]
Further, according to a third aspect of the present invention, in the second aspect of the present invention, the switch means includes a first switch for switching and connecting the amplifier to a bone conduction microphone or a bone conduction speaker, and an amplifier for receiving or transmitting. And a second switch for switching connection to the means.
[0013]
The present invention according to claim 4 is provided for receiving an audio signal transmitted as a radio signal from a helmet communication main body device provided outside and provided to a helmet wearer, which is provided on a helmet worn on the head. A communication device for a helmet, provided on the helmet, for transmitting an audio signal to a helmet wearer by bone conduction, and a reception device for receiving a radio signal from the communication device for the helmet and outputting it as an audio signal. Means and an amplifier for amplifying the audio signal from the receiving means and supplying the amplified signal to the bone conduction speaker.
[0014]
According to the fourth aspect of the present invention, an audio signal transmitted as a wireless signal from the helmet communication main unit is received and amplified by the receiving means, and transmitted to the helmet wearer by bone conduction by the bone conduction speaker. Therefore, even when wearing a motorcycle, for example, wearing a helmet, the audio signal can be clearly heard without being disturbed by external sounds such as wind noise.
[0015]
According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the communication main body device for the helmet includes an audio player for generating an audio signal, and an amplifier for amplifying the audio signal from the audio player. Transmitting means for transmitting the amplified audio signal from the amplifier to the outside as a wireless signal.
[0016]
The present invention according to claim 6 is the invention according to claim 5, wherein a plurality of the audio reproducers are provided, and one of the plurality of audio reproducers is selected and supplied to the amplifier. The point is to have a selection switch for performing the operation.
[0017]
According to a seventh aspect of the present invention, in the present invention according to any one of the first to sixth aspects, a special sound detecting means for detecting a predetermined special sound generated in the surroundings, and a level of the detected special sound Is more than a predetermined value, it is essential to have an attenuator for attenuating the output level of the receiving means.
[0018]
According to the present invention as set forth in claim 7, in order to attenuate the output level of the receiving means, a predetermined special sound generated in the vicinity is detected, and when the level of the detected special sound is equal to or more than a predetermined value, For example, when a special sound such as a siren in an ambulance or a warning sound at a railroad crossing is detected, the volume of the conversation or audio signal from the receiving means is attenuated, so that the special sound such as a siren or a warning sound can be heard clearly. , Safety can be ensured.
[0019]
According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the bone conduction microphone and the bone conduction speaker include a cushioning material between the inner skin and the outer skin of the helmet. The point is that it is buried through.
[0020]
According to the present invention, since the bone conduction microphone and the bone conduction speaker are buried between the inner skin and the outer skin of the helmet with the cushioning material interposed therebetween, an excellent design is provided. It is possible to do.
[0021]
Further, according to a ninth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the bone conduction microphone and the bone conduction speaker are provided detachably from a helmet. Make a summary.
[0022]
According to the present invention, since the bone conduction microphone and the bone conduction speaker are detachable from the helmet, the bone conduction microphone and the bone conduction speaker can be attached to any helmet, for example, a helmet currently in use. When the microphone and the bone conduction speaker are not used, they can be detached and stored separately.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of a communication device for a helmet according to an embodiment of the present invention. The figure shows two communication devices for helmets 1a and 1b, and the communication devices for helmets 1a and 1b are bone-conduction microphones 11a and 11b, microphones 11a and 11b, and bone-conduction speakers. 13a, 13b, for example, respectively provided on the helmets covering the heads of two persons riding on one motorcycle or two persons riding on two motorcycles running side by side, A call is made between two persons by bone conduction using the bone conduction microphones 11a and 11b and the bone conduction speakers 13a and 13b. The helmet communication devices 1a and 1b have the same configuration. Therefore, in the following description, the alphabets at the end of the reference numerals denoting the respective components will be omitted unless particularly necessary.
[0024]
In each helmet communication device 1, the bone conduction microphone 11 and the bone conduction speaker 13 are connected to the amplifier 17 via the first switch 15. The amplifier 17 is connected to the transmitter 21 or the receiver 25 via the second switch 19. The transmitter 21 and the receiver 25 are connected to antennas 23 and 27, respectively, and can communicate with each other wirelessly via the antennas 23 and 27. The first switch 15 other than the bone conduction microphone 11 and the bone conduction speaker 13, the amplifier 17, the second switch 19, the transmitter 21, the antenna 23, the receiver 25, and the antenna 27 are, for example, the circuit unit 10. After being mounted on the board, it is integrally housed in a thin box.
[0025]
The first changeover switch 15 and the second changeover switch 19 are switched synchronously by an operation unit or a control unit (not shown) as shown by being connected by a dotted line. When the switch 15 is connected to the bone conduction microphone 11, the second switch 19 is connected to the transmitter 21. When the switch 15 is connected to the bone conduction speaker 13, the second switch 19 is connected to the second switch 19. Switch 19 is connected to the receiver 25.
[0026]
In the communication device 1 for a helmet shown in FIG. 1, as shown in FIG. 2, a bone conduction microphone 11 is provided on an upper portion of a helmet 31, that is, an upper portion corresponding to a top of a person wearing the helmet 31. Is provided on the side of the helmet 31, that is, on the side slightly above the ear 32 of the person wearing the helmet 31, and the circuit unit 10 is provided on the side slightly rearward. When the helmet communication device is a stereo type, two bone conduction speakers 13 are provided on the left and right sides. In this case, the two bone conduction speakers 13 are It will be provided on both left and right symmetrical sides as in FIG. In addition, the bone conduction microphone 11 and the bone conduction microphone 13 may be provided detachably with respect to the helmet 31 for ease of use.
[0027]
More specifically, the bone conduction microphone 11 and the bone conduction speaker 13 are provided on a helmet 31 as shown in FIGS. That is, as shown in a partial cross section of the helmet 31 in FIG. 3A, the bone conduction microphone 11 is provided with a central cushioning member 37 between the outer member 33 and the inner cushioning member 35 constituting the cover of the helmet 31. The inside of the helmet 31 is provided inside the outer member 33 which is provided in close contact with the inner buffer member 35 or is provided outside the central buffer member 37 of the helmet 31 as shown in FIG. Thus, a voice signal of a conversation released by the helmet wearer is detected by the bone conduction microphone 11 via the inner buffering member 35 and the central buffering member 37 by bone conduction. In the case of FIG. 3B, a transmission member 11a for efficiently transmitting the sound transmitted to the bone conduction to the bone conduction microphone 11 is provided. The material and shape (plate thickness, diameter, etc.) of the transmission member 11a may be optimized in consideration of resonance or the like in order to transmit sound by bone conduction.
[0028]
The bone conduction speaker 13 has a central cushioning member 37 between an outer member 33 and an inner cushioning member 35 constituting a cover of the helmet 31, as shown in a partial cross section of the helmet 31 in FIG. The inner helmet 31 is provided in close contact with the inner cushioning member 35, and the periphery of the central cushioning member 37 is covered with a peripheral protection cushioning member 39, or as shown in FIG. The helmet wearer is provided inside the outer member 33 provided outside the central cushioning member 37, whereby the audio signal from the bone conduction speaker 13 is transmitted through the inner cushioning member 35 and the central cushioning member 37 by bone conduction. It is to be transmitted to. In addition, as shown in FIG. 4A, the peripheral protection cushioning member 39 surrounding the periphery of the bone conduction speaker 13 not only protects the periphery of the bone conduction speaker 13 but also causes the vibration of the bone conduction speaker 13 to be centered. It also has a function of preventing transmission to the bone conduction microphone 11 via the buffer member 37.
[0029]
The helmet communication devices 1a and 1b configured as described above include, for example, respective heads of two persons riding on a motorcycle or two persons riding on two motorcycles running in parallel. The two persons can communicate clearly and comfortably via the helmet communication devices 1a and 1b provided on the helmet. That is, when one person who has the helmet communication device 1a in the helmet speaks, the sound is detected by the bone conduction microphone 11a by bone conduction, converted into an electric signal, and amplified by the amplifier 17a via the first switch 15a. Is amplified by the second switch 19a, is further supplied to the transmitter 21a via the second switch 19a, and is transmitted from the transmitter 21a as a wireless signal via the antenna 23a.
[0030]
The radio signal from the antenna 23a is received by the receiver 25b via the antenna 27b of the helmet communication device 1b provided on the helmet of the other person, and is converted into an electric audio signal. This electric audio signal is amplified by an amplifier 17b via a second changeover switch 19b, and supplied to a bone conduction speaker 13b via a first changeover switch 15b. To the other person. The synchronous switching operation of the first changeover switch 15 and the second changeover switch 19 in the above-described operation is performed by an operation unit or a control unit (not shown), but the operation or operation is omitted in the above description. . However, this is described in the embodiment shown in FIG.
[0031]
In this way, a story from one person is transmitted to the other person via bone conduction and radio, and conversely, a story from the other person is likewise transmitted to one person via bone conduction and radio. Is transmitted, so that the conversation between the two is clear and comfortable. Since this conversation is conducted using bone conduction without using both ears, the sound of the motorcycle cutting off the wind will not be drowned out, and if, for example, an ambulance siren sounds around, The siren and surrounding sounds can be clearly heard by both ears separately from bone conduction, and do not hinder safety. Furthermore, since the helmet communication device 1 of the present embodiment utilizes bone conduction and wireless communication, troublesome work such as inserting earphones in ears, attaching headphones, and connecting wires is also required. There is no need to simply wear a helmet, and conversation can be carried out. Also, the cords and the like do not disturb while traveling, and it is safe even when falling.
[0032]
FIG. 5 is a block diagram showing a circuit configuration of a communication device for a helmet according to another embodiment of the present invention. The communication device for helmet 1c, 1d of the embodiment shown in the figure is provided with a voice recognition circuit 29 which is a monitoring means for monitoring the electric signal from the bone conduction microphone 11 in the embodiment shown in FIG. 29 is different from the first embodiment in that the synchronous switching operation of the first switch 15 and the second switch 19 is automatically performed based on the determination result of step 29, and the other configurations and operations are the same. The components are denoted by the same reference numerals.
[0033]
That is, in the embodiment of FIG. 5, a voice recognition circuit 29 is provided at the output of the bone conduction microphone 11, and the voice recognition circuit 29 monitors the electric signal from the bone conduction microphone 11, and outputs the electric signal from the bone conduction microphone 11. The amplifier 17 is connected to the bone conduction microphone 11 to determine whether an electrical signal is output from the bone conduction microphone 11 based on the determination result. And disconnects the amplifier 17 from the transmitter 21 to control the first changeover switch 15 so as to disconnect the amplifier 17 from the receiver 25. If it is determined that no electric signal is output from the bone conduction microphone 11, Disconnects the amplifier 17 from the bone conduction microphone 11 and connects it to the bone conduction speaker 13, and disconnects the amplifier 17 from the transmitter 21 and connects it to the receiver 25. And controls the second changeover switch 19 so as to continue.
[0034]
By the synchronous switching control of the first changeover switch 15 and the second changeover switch 19 by the voice recognition circuit 29, for example, each time a person wearing a helmet having the helmet communication device of the present embodiment has a conversation, a switch is set. A troublesome operation of operating a switching operation button or the like is not required, and conversation can be freely performed.
[0035]
FIG. 6 is a block diagram showing a configuration of a communication device for a helmet according to another embodiment of the present invention. The embodiment shown in the figure is a helmet for receiving an audio signal transmitted as a wireless signal from a helmet communication main unit 100 provided outside a helmet, for example, a motorcycle body, and transmitting the audio signal to a helmet wearer. 1 shows a communication device 1e.
[0036]
The helmet communication main unit 100 has a plurality of audio devices that generate audio signals, such as a CD player 51, an MD player 53, a radio 55, and a cassette tape player 57. The selected audio signal is selected by the selection switch 60, the selected audio signal is amplified by the amplifier 61, and transmitted as a wireless signal from the antenna 65 to the helmet communication device 1 e via the transmitter 63 constituting the modulator. It is supposed to. The audio signal from each audio device is a stereo signal, and is output as two signals on the left and right as indicated by L and R in the figure, amplified by the amplifier 61, and transmitted through the transmitter 63 to the antenna 65. Is output from
[0037]
The helmet communication device 1e receives the audio signal of the wireless signal from the helmet communication main unit 100 via the antenna 27 at the receiver 25 constituting the demodulator and converts it into an audio signal. The audio signal output from the receiver 25 is amplified by the amplifier 17, supplied to the left and right bone conduction speakers 13L and 13R, transmitted to the helmet wearer by bone conduction, and the helmet wearer converts the left and right audio signals. You can listen and enjoy it.
[0038]
The amplifier 17 and the receiver 25 among a plurality of components constituting the helmet communication device 1e are integrally mounted in a thin box after being mounted on a board, for example, as a circuit unit 10e as shown by a dotted line. Is contained. The circuit portion 10e and the bone conduction speakers 13L and 13R are provided on the helmet 31 as shown in FIG. More specifically, they are provided so as to be embedded between the inner cushioning member 35 and the outer member 33 of the helmet 31 as shown in FIGS.
[0039]
As described above, the helmet communication main unit 100 is used by being attached to, for example, the body of a motorcycle. In this use, first, a helmet wearer who rides on a motorcycle uses a helmet communication device attached to the motorcycle. When a desired audio device, for example, a CD player 51 is selected from a plurality of audio devices by the selection switch 60 of the main device 100, the audio signal from the selected CD player 51 is amplified by the amplifier 61, The signal is transmitted as a wireless signal from the transmitter 63 via the antenna 65 and transmitted to the helmet communication device 1e provided on the helmet of the helmet wearer.
[0040]
In the helmet communication device 1e, the audio signal of the radio signal from the helmet communication main device 100 is received by the receiver 25 via the antenna 27, amplified by the amplifier 17, and supplied to the left and right bone conduction speakers 13L and 13R. Is transmitted to the helmet wearer by bone conduction from the bone conduction speakers 13L and 13R, so that the helmet wearer can enjoy the audio signal from the CD player 51 of the helmet communication main unit 100.
[0041]
The helmet communication main unit 100 is housed in a case made of, for example, plastic or metal, and the helmet communication main unit 100 is attached to the motorcycle body as described above. In the case of attachment, it is preferable that the case of the main body is fixedly attached to the motorcycle body with screws or the like, and that the cover between the case and the motorcycle is fixed with a key or the like so as not to be easily removed. If, for example, the case of the helmet communication main unit 100 is forcibly removed from the motorcycle main body without using a key, an alarm can be issued.
[0042]
In addition, the audio signal from the helmet communication main unit 100 attached to one motorcycle can be heard not only by the helmet communication device 1e of the helmet of the person riding the motorcycle but also in parallel with the motorcycle. Of course, it is possible to listen to the helmet communication device 1e of another helmet riding another motorcycle.
[0043]
Further, the audio signal from the helmet communication main unit 100 shown in FIG. 6 can be heard not only by the helmet communication device 1e shown in FIG. 6, but also, for example, the helmet communication device 1a shown in FIG. 1 or FIG. Needless to say, the same can be heard in the case of １1d. That is, in this case, the audio signal of the radio signal transmitted from the communication device for helmet 100 is received by the receiver 25 via the antenna 27 of the communication device for helmet 1a to 1d, and the second switch 19 Is supplied to the amplifier 17 via the. The audio signal amplified by the amplifier 17 is supplied to the bone conduction speaker 13 via the first switch 15 and transmitted from the bone conduction speaker 13 to the helmet wearer by bone conduction. In this case, since there is only one bone conduction speaker 13, the audio signal from the helmet communication main unit 100 cannot be heard as a stereo, but the bone conduction speakers 13 of the helmet communication devices 1a to 1d are left and right stereo. Of course, by providing two units for use, it is possible to hear as a stereo audio signal. In the case where the helmet communication device shown in FIG. 1 or FIG. 5 is listening to the audio signal from the helmet communication main unit 100 as described above, when a conversation from another helmet wearer enters, or the like, It is also possible to have a conversation while listening to the audio signal from the helmet communication main unit 100 as BGM (background music). In this case, the conversation is performed without interrupting the music of the audio signal. be able to. In this case, it is also possible to control the BGM audio signal to be automatically reduced in order to make it easier to hear conversations and the like.
[0044]
FIG. 7 is a block diagram showing a configuration of a main part of a communication device for a helmet according to still another embodiment of the present invention.
[0045]
The helmet communication device 15 shown in FIG. 7 shows a main part of the helmet communication device applicable to any of the embodiments shown in FIGS. In the communication device for a helmet according to the embodiment, when a predetermined special sound such as an ambulance siren or a level crossing warning is sounding around while listening to conversation or audio, such a special sound is clearly heard. In order to attenuate the volume of conversation and audio, the other configurations and operations are the same as those of the embodiment shown in FIGS. 1, 5 and 6, and the circuit configuration of that portion is partially omitted. .
[0046]
That is, the helmet communication device 15 of the embodiment shown in FIG. 7 has a microphone phone (hereinafter abbreviated as a microphone) 81 that picks up surrounding sounds including special sounds such as sirens and alarm sounds. A special sound is selectively detected by the bandpass filter 83 from the picked-up surrounding sounds. That is, the bandpass filter 83 has a filter characteristic that allows only the frequency of the special sound to pass through, as illustrated below the bandpass filter 83 in FIG.
[0047]
Accordingly, when the bandpass filter 83 selectively detects and passes a special sound from the surrounding sounds, the special sound is supplied to the attenuator 87 as an ON signal via the controller 85, and thereby the attenuator 87 Is increased.
[0048]
The attenuator 87 is supplied with the voice signal or audio signal of the conversation received by the receiver 25 via the antenna 27, so that the controller 85 sends the ON signal to the attenuator 87 in response to the special sound. Is supplied, the amount of attenuation of the attenuator 87 increases, whereby the level of the speech signal or audio signal of the conversation from the receiver 25 is reduced and reduced. Therefore, even if the reduced voice signal or audio signal is amplified by the amplifier 17 and transmitted to the helmet wearer through the bone conduction speaker 13 by bone conduction, the helmet wearer does not hear the conversation voice signal or audio signal. It is possible to hear the surrounding siren and the alarm sound clearly without being heard by a small sound and being disturbed by the voice signal or the audio signal of the conversation, and to drive safely.
[0049]
Although not shown, for example, in the communication device for a helmet of the embodiment shown in FIGS. 1, 5, and 7 described above, a mobile phone connection terminal, a mobile phone holder, and the like are provided, and the mobile phone is held in the mobile phone holder. A mobile phone is connected to the telephone connection terminal, and an incoming signal and a voice signal from the mobile phone are supplied to the bone conduction speaker 13 via the amplifier 17 so that the bone conduction speaker 13 can receive a mobile phone call to the helmet wearer. It is also possible to transmit audio, so that telephone conversations can be automatically and smoothly performed.
[0050]
Further, in the communication device for a helmet of each of the above-described embodiments, by making it possible to switch the frequency of a wireless channel for a conversation or an audio signal, a plurality of communication devices for a helmet can listen to a plurality of communication devices. The communication device for the helmet does not all listen to the same conversation or audio, but rather switches the frequency of the radio channel, for example, every two conversations or every group, so that conversations and audio listening can be done to others. It is also possible to control so as not to hear. It is also possible to set the frequency of a wireless channel for conversation or audio signals to be different, and to select only music or only conversation.
[0051]
Furthermore, it is also possible to add a car navigation function to the helmet communication device of each of the above-described embodiments, and transmit road guidance of the car navigation by bone conduction.
[0052]
In addition, by making the above bone conduction microphone and the bone conduction speaker detachable from the helmet, it is possible to easily attach and enjoy a conversation to any helmet, for example, a helmet of a touring fellow, as appropriate. When the bone conduction speaker is not used, it can be removed and stored separately.
[0053]
In each of the above-described embodiments, the helmet communication device 1 also has, for example, a DC 12 V battery, a volume for volume control, and the like in addition to the above components. It is also possible to adjust the volume of each.
[0054]
【The invention's effect】
As described above, according to the present invention, the voice of the conversation of the helmet wearer is received and amplified by bone conduction with the bone conduction microphone, and transmitted as a wireless signal from the transmission means to another external helmet wearer. Then, the reception means receives and amplifies the radio signal of the conversation of the other helmet wearer from outside with the receiving means, and transmits it by bone conduction by the bone conduction speaker, so even when wearing a helmet, for example, when riding a motorcycle, Clear conversations between fellow passengers and between people riding multiple motorcycles running side by side, without wind noise while running and without helmet covering ears be able to.
[0055]
Further, according to the present invention, the output from the bone conduction microphone is monitored, and when an electrical signal is output from the bone conduction microphone, the amplifier is connected to the bone conduction microphone and disconnected from the bone conduction speaker, and the amplifier is disconnected. When the electric signal is not output from the bone conduction microphone, the amplifier is disconnected from the bone conduction microphone and connected to the bone conduction speaker, and the amplifier is disconnected from the transmission means. , The switching operation can be automatically performed every time a conversation is performed, and the conversation can be smoothly performed without any troublesome switching operation.
[0056]
Furthermore, according to the present invention, the audio signal transmitted as a wireless signal from the helmet communication main unit is received and amplified, and transmitted to the helmet wearer by bone conduction with the bone conduction speaker. For example, even when riding a motorcycle, it is possible to clearly hear the audio signal without being disturbed by external sounds such as wind noise.
[0057]
According to the present invention, a predetermined special sound generated in the surroundings is detected, and when the level of the detected special sound is equal to or more than a predetermined value, the output level of the receiving means is attenuated. When a special sound, such as a warning sound, is detected, the volume of the conversation or audio signal from the receiving means is attenuated, so that the special sound, such as a siren or a warning sound, can be heard clearly to ensure safety. be able to.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a communication device for a helmet according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a structure in which the helmet communication device shown in FIG. 1 is attached to a helmet.
FIG. 3 is a sectional view showing the structure of the helmet provided with the bone conduction microphone of the communication device for a helmet as shown in FIG. 2;
FIG. 4 is a sectional view showing the structure of the helmet provided with the bone conduction speaker of the communication device for a helmet as shown in FIG. 2;
FIG. 5 is a block diagram showing a circuit configuration of a communication device for a helmet according to another embodiment of the present invention.
FIG. 6 is a block diagram showing a configuration of a communication device for a helmet according to another embodiment of the present invention.
FIG. 7 is a block diagram showing a configuration of a main part of a communication device for a helmet according to still another embodiment of the present invention.
[Explanation of symbols]
1a-1e Communication device for helmet
10, 10a to 10e Circuit section
11, 11a, 11b Bone conduction microphone
13, 13a, 13b, 13L, 13R Bone conduction speaker
15a, 15b First switch
17, 17a, 17b Amplifier
19a, 19b Second changeover switch
21a, 21b transmitter
23a, 23b, 27a, 27b antenna
25, 25a, 25b receiver
29a, 29b speech recognition circuit
51 CD player
53 MD regenerator
55 radio
57 cassette tape player
60 Selection switch
61 Amplifier
63 transmitter
81 microphone
83 bandpass filter
85 Controller
87 attenuator
100 communication device for helmet

Claims (9)

A communication device for a helmet that is provided on a helmet that covers the head, and that communicates with the outside,
A bone conduction microphone that is provided on the helmet and receives the sound of the helmet wearer by bone conduction and converts it into an electric signal,
A bone conduction speaker provided on the helmet and transmitting the electric voice signal to the helmet wearer by bone conduction;
An amplifier connected to the bone conduction microphone and the bone conduction speaker, for amplifying an electric signal from the bone conduction microphone and amplifying an electric voice signal to the bone conduction speaker,
A transmitting unit connected to the amplifier and transmitting an electric signal from the bone conduction microphone amplified by the amplifier to the outside as a wireless signal;
A communication device for a helmet, comprising: receiving means connected to the amplifier, for receiving a radio signal from the outside, and supplying the signal to a bone conduction speaker via the amplifier. A monitoring circuit that monitors an output from the bone conduction microphone and determines whether an electric signal is output from the bone conduction microphone,
If it is determined by this monitoring circuit that an electrical signal is being output from the bone conduction microphone, the amplifier is connected to the bone conduction microphone and disconnected from the bone conduction speaker, and the amplifier is connected to the transmitting means and connected to the receiving means. When it is determined that the electrical signal is not output from the bone conduction microphone, the amplifier is disconnected from the bone conduction microphone and connected to the bone conduction speaker, and the amplifier is disconnected from the transmission unit and connected to the reception unit. 2. The communication device for a helmet according to claim 1, further comprising: switch means that operates. 3. The apparatus according to claim 2, wherein the switch means includes a first switch for switching and connecting the amplifier to a bone conduction microphone or a bone conduction speaker, and a second switch for switching and connecting the amplifier to reception means or transmission means. The communication device for a helmet according to the above. A helmet communication device for receiving an audio signal transmitted by a wireless signal from a helmet communication main device provided outside and provided to a helmet wearer, provided on a helmet that covers the head,
A bone conduction speaker provided on the helmet and transmitting the audio signal to the helmet wearer by bone conduction,
Receiving means for receiving a radio signal from the communication body device for the helmet and outputting it as an audio signal,
A communication device for a helmet, comprising: an amplifier for amplifying an audio signal from the receiving means and supplying the amplified audio signal to the bone conduction speaker. The communication device for the helmet
An audio player for generating an audio signal;
An amplifier for amplifying the audio signal from the audio player;
5. The communication device for a helmet according to claim 4, further comprising a transmission unit that transmits the amplified audio signal from the amplifier as a wireless signal to the outside. 6. The communication for a helmet according to claim 5, wherein a plurality of the audio reproducers are provided, and a selection switch for selecting any one of the plurality of audio reproducers and supplying the selected audio reproducer to the amplifier is provided. apparatus. Special sound detecting means for detecting a predetermined special sound generated in the surroundings, and an attenuator for attenuating the output level of the receiving means when the level of the detected special sound is equal to or higher than a predetermined value. The communication device for a helmet according to any one of claims 1 to 6. The communication device for a helmet according to any one of claims 1 to 7, wherein the bone conduction microphone and the bone conduction speaker are embedded between the inner skin and the outer skin of the helmet via a buffer material. . The helmet communication device according to any one of claims 1 to 7, wherein the bone conduction microphone and the bone conduction speaker are detachably provided to a helmet.

Images