JP2023096202A - intercom for helmet - Google Patents

Abstract

To provide an intercom for a helmet that is easy to hear and easy to use even at a construction site, etc., where there is a lot of ambient noise.SOLUTION: An intercom for a helmet that allows a user with a helmet on the head to talk includes a main portion having a communication portion, and a voice generation portion and a voice microphone at the bottom of the main portion, and the sound generation portion includes a sound generation unit having a diaphragm and an exciter for vibrating the diaphragm, the diaphragm faces substantially in the direction of the ear, and configured to transmit sound to the ear, and therefore, it is easy to hear and easy to use even in places with a lot of ambient noise.SELECTED DRAWING: Figure 1

Description

The present invention relates to a helmet communication device. More particularly, it relates to a helmet communication device attached to a helmet.

In recent years, there has been a demand for a helmet communication device that is easy to hear and easy to use even in places where there is a lot of ambient noise, such as construction sites.

As such a device, there is a wireless device speaker box attached to a helmet disclosed in Patent Document 1. In this device, a speaker box with built-in speakers is attached to the helmet by mounting metal fittings at a position where the sound can be heard without contacting the ears.

Conventional methods of listening to the voice of radios include earphones and headphones that are placed directly on the ear, and speakers that are built into the radio itself. If earphones or headphones are used for wireless communication, one ear of the construction party will be sealed with the earphones or headphones. When listening to ambient noise with one ear for a long period of time, the user physiologically complains of pain such as a headache. In addition, the built-in radio speaker type has the drawback that the voice is drowned out by the surrounding noise, making it difficult to hear.

According to the speaker box of this device, it is possible to listen to the voice from the radio and to hear the ambient noise with both ears without touching the ears. By constructing in this way, the feeling of a foreign object in the earphone or headphone is eliminated from the ear, and the sound is not drowned out unlike the speaker type with built-in radio, and stable sound can always be obtained.

Further, as such a device, there is a wireless device attached to a helmet disclosed in Patent Document 2. This device is configured so that a main body and a storage battery are separately attached to the left and right sides of a helmet for a wireless device and an information terminal device, and a power line connecting them is arranged at the rear of the helmet.

Here, the slinging work performed while communicating with the crane is the loading and unloading work performed using a sling for hanging with a hook, etc. in cargo handling and transportation work using a crane, etc. It requires skill. Here, in the case of the speaker box described in Patent Document 1, it is connected to a wireless device or the like in a chest pocket or waist belt by a connection line.

In that case, the signal person who uses the radio and the slinger are the actual workers, and their occupations involve frequent movements such as work using tools, slinging work, and confirmation of assembly, and are always positioned in front of their faces and bodies. Connection lines get in the way of work. In other words, since the connection line extends from the helmet to the chest pocket and the waist belt, the work efficiency of the signaling person wearing the radio and the slinger is reduced, and the connection line is damaged by mistake, resulting in the loss of communication with the crane. Work will be hindered.

In addition, when equipment is installed, tested, and inspected and adjusted in a narrow space, the actual equipment moves in a remote location and is monitored and displayed on the control panel. It is necessary to double and triple reconfirmation because it is not allowed to change the wiring and switch on and off again in an emergency, and it is necessary for the information terminal that assists the workers to function normally. be done.

According to the wireless device of this device, the main body and the storage battery are attached to the helmet separately on the left and right, and the power line is placed at the back of the helmet, so the weight that burdens the neck is distributed to the left and right, making it easier to work. It has a structure that does not interfere and reduces the burden on the neck even when used for a long time. In addition, even when inspecting and adjusting equipment in a narrow space, it is possible to use it for a long time without protruding from the width of the helmet and not disturbing the working posture.

Utility Model Registration No. 3054182 Utility Model Registration No. 3231461

However, in the technique described in Patent Document 1, as described in Patent Document 2, there is a problem that the connection wires protruding from the speaker box interfere with the work of the operator.
In addition, in order to obtain a sufficient volume from a speaker box located away from the ear at a construction site where there is a lot of noise, as shown in the drawing of Patent Document 1, a speaker having a relatively large size is required. The larger the speaker, the heavier the magnet that creates the magnetic field. As a result, the weight of the speaker box to be supported by the neck becomes heavy, the power consumption for driving the speaker box is large, and a large and heavy power supply is required.

In addition, in the technique described in Patent Document 2, the main body of the wireless device and the storage battery are attached to the helmet separately on the left and right to distribute the weight to the left and right to reduce the burden on the neck. The total weight is supported by the neck, and there is an inconvenience that the weight supported by the neck increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a communication device for a helmet that is easy to hear and easy to use even in a place where the surrounding noise is loud.

In order to solve the above problems, the present invention employs the following configurations.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helmet communication device that can be attached to a helmet so that a user wearing the helmet on the head can talk.
The helmet communication device has a body portion having a communication portion, and a voice generation portion and a voice microphone portion at the bottom of the body portion. A sound generating unit having an exciter for vibrating and generating sound, the diaphragm being positioned in the vicinity of the outside of at least one ear of the user, the diaphragm being oriented substantially in the direction of the ear, and It is characterized in that it is configured so that voice is transmitted to it.

In addition, the sound generating section surrounds the sides and bottom of the sound generating unit and has a sound guide that is open substantially in the direction of the ear. characterized by having

In addition, the sound generation unit has a diaphragm holding section separated from the diaphragm via a first elastic body, and a space formed by the diaphragm, the first elastic body, and the diaphragm holding section is provided. Second, the exciter is configured to be held, and the diaphragm holding portion is fixed to the sound guide.

Also, the diaphragm holding portion is fixed to the audio guide via the second elastic body, and the audio microphone portion is a built-in microphone housed inside the helmet communication device.

In addition, the helmet has a cap body that is substantially hemispherical in shape, and a battery that is a power supply for the helmet communication device is housed in the main body. It is characterized in that the sound generator provided at the bottom of the main body is located substantially above the end of the side of the cap body and is positioned substantially below the end of the side of the cap body.

Further, the helmet communication device is characterized by having an attachment portion for detachably attaching the helmet communication device to the helmet.

The helmet has an attached portion corresponding to the attaching portion, and the attaching portion and the attached portion are configured to be connectable with a string or wire.

According to the present invention, since it has the above-described characteristics, it becomes possible to demonstrate below.

A helmet communication device that can be attached to a helmet so that a user wearing the helmet on the head can make a call. The sound generating unit has a sound generating unit and a sound microphone unit, and the sound generating unit has a diaphragm and an exciter fixed to the back surface of the diaphragm and vibrating the diaphragm to generate sound. , is placed near the outer side of at least one ear of the user, the diaphragm faces substantially in the direction of the ear, and is configured to transmit sound to the ear, so it can be used like earphones and headphones. It is possible to obtain a communication device for a helmet that is easy to hear and easy to use even in a place where the surrounding noise is loud without sealing the ears.

In addition, the sound generating section surrounds the sides and bottom of the sound generating unit and has a sound guide that is open substantially in the direction of the ear. Therefore, the sound pressure in the vocal band of the human voice is increased to generate a sound that is easy to hear, and the generated sound is given directivity so that the sound is transmitted substantially in the direction of the user's ear. In addition, it is possible to reduce the transmission of sound in directions other than the approximate direction of the ear, thereby preventing the contents of the call from leaking to the outside.

In addition, the sound generation unit has a diaphragm holding section separated from the diaphragm via a first elastic body, and a space formed by the diaphragm, the first elastic body, and the diaphragm holding section is provided. In addition, since the exciter is held and the diaphragm holding part is fixed to the sound guide, the vibration energy generated by the exciter concentrates on the diaphragm and vibrates it efficiently. In addition, it is possible to reduce the leakage of sound to the outside due to vibration being transmitted to other parts of the helmet communication device.

Further, the diaphragm holding portion is fixed to the audio guide via the second elastic body, and the audio microphone portion is a built-in microphone housed inside the helmet communication device. The built-in microphone can be placed near the sound generation unit because it can reduce leakage to the outside of the helmet communication device and reduce howling caused by being transmitted through the housing of the helmet communication device to the built-in microphone. As a result, it is possible to reduce the size of the helmet communication device.

In addition, the helmet has a cap body that is substantially hemispherical in shape, and a battery that is a power supply for the helmet communication device is housed in the main body. The main body is stable because the sound generating part provided at the bottom of the main body is positioned substantially above the end of the side of the cap body and is positioned substantially below the end of the side of the body. As a result, the sound generator is held by the cap, and the sound generator can transmit sound with directivity toward the ears.

Further, since the helmet communication device has an attachment portion for detachably attaching the helmet communication device to the helmet, the helmet communication device can be detached from the helmet and charged independently.

The helmet has an attachment part corresponding to the attachment part, and the attachment part and the attachment part are configured to be connectable with a string or wire. Even if the communication device for the helmet comes off from the helmet, the communication device for the helmet can be prevented from falling, and the communication device for the helmet can be prevented from being lost, broken, or hit by another person.

1 is a perspective view showing a usage example of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is a perspective view showing a state in which the helmet communication device according to the first embodiment of the present invention is attached to a helmet; FIG. BRIEF DESCRIPTION OF THE DRAWINGS The structure of the helmet communication apparatus which concerns on the 1st Embodiment of this invention is shown, (A) is the perspective view seen from the surface direction, (B) is the perspective view seen from the back surface direction. BRIEF DESCRIPTION OF THE DRAWINGS The structure of the helmet communication apparatus which concerns on the 1st Embodiment of this invention is shown, (A) is a reference perspective view, (B) is a front view. 1 shows the configuration of the helmet communication device according to the first embodiment of the present invention, where (C) is a rear view, (D) is a top view, and (E) is a bottom view. BRIEF DESCRIPTION OF THE DRAWINGS The structure of the helmet communication apparatus which concerns on the 1st Embodiment of this invention is shown, (F) is a left side view, (G) is a right side view, (H) is a reference perspective view. 1 is an exploded perspective view showing the configuration of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is an exploded perspective view showing the configuration of a main part of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is an exploded perspective view showing the configuration of a main part of a helmet communication device according to a first embodiment of the present invention; FIG. 1A and 1B are cross-sectional views showing the configuration of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is a partial cross-sectional view showing a usage example of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is a schematic diagram showing a usage example of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is a block diagram showing a circuit configuration of a helmet communication device according to a first embodiment of the present invention; FIG. 1 is a perspective view showing a usage example of a helmet communication device according to a first embodiment of the present invention; FIG. FIG. 11 is a perspective view showing a usage example of the helmet communication device according to the second embodiment of the present invention; FIG. 8 shows the configuration of a helmet communication device according to a third embodiment of the present invention, where (A) is a perspective view seen from the front side, and (B) is a perspective view seen from the back side. FIG. 12 is a partial cross-sectional view showing the configuration of the essential parts of the helmet communication device according to the third embodiment of the present invention; 5 is a graph showing frequency characteristics of helmet communication devices according to different embodiments of the present invention. FIG. 10 shows the configuration of the main part of the helmet communication device according to fourth to sixth embodiments of the present invention, (A) is a partial sectional perspective view showing the configuration of the fourth embodiment, FIG. 12C is a partial cross-sectional view showing the configuration of the embodiment, and (C) is a partial cross-sectional view showing the configuration of the sixth embodiment; FIG. 14 is a schematic diagram showing a usage example of the helmet communication device according to the seventh embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the following description, the front-rear direction, the up-down direction, and the left-right direction as viewed from the user's side are described when the user wears a helmet with the helmet communication device attached to the left side of the helmet. The direction of the user's face is the front direction (front direction), the opposite direction is the rear direction (back direction), and the left side of the user's face is the left direction (front side). direction), and the opposite direction is called the right direction (back side direction).
However, directions such as front-rear, up-down, left-right, etc. shown below are shown for convenience of explanation, and the present technology is not limited to these directions.

(First embodiment)
A helmet communication device 1 (helmet communication device) according to a first embodiment of the present invention will be described with reference to FIGS.
1 and 2 are perspective views showing an example of use of the helmet communication device 1, FIGS. 3A and 3B are perspective views showing its configuration, and FIGS. Figure 7 is a perspective exploded view, Figures 8 and 9 are perspective exploded views of the main part, Figures 10(A), (B) and 11 are partial sectional views, and Figure 12 is a use FIG. 13 is a schematic diagram showing an example, FIG. 13 is a circuit block diagram, and FIG. 14 is a perspective view showing an example of its use.

FIG. 1 shows a situation in which a user U wearing a helmet 1000 to which a helmet communication device 1 is attached on the left side is talking using the helmet communication device 1 . Here, before explaining the helmet communication device 1, the helmet 1000 will be briefly explained.

As shown in FIG. 1, the helmet 1000 is called a work helmet or an industrial protective helmet, and absorbs the impact on the head when flying or falling objects, crashing, or falling at a construction site or the like. , which serves to prevent injuries to the head. Work helmets include the MP type, which has a hemispherical shape, the baseball cap type with a front peak, and the American type, which has a front peak and is highly designed. The helmet 1000 is an American type. belongs to.

As shown in FIG. 1, a helmet 1000 is a shell that covers and protects the head. It has a chin strap 1200 for fixing and preventing falling off. The cap body 1100 has a hemispherical cap body 1110 and a front eaves 1120, and the entire circumference of the edge continuous with the front eaves 1120 has a substantially U-shaped cross section to prevent raindrops from entering the nape of the neck. A guard groove 1130 is formed.

As shown in FIG. 1, the helmet communication device 1 includes a body portion 10 (main body portion) formed in a substantially rectangular box shape at the upper portion and a sound generating portion 20 (sound generating portion) for generating sound at the lower portion thereof. and attached to the left side of the helmet 1000 . Here, the sound generator 20 is arranged in the vicinity of the outside of the ear of the user U and away from the ear, unlike an earphone or headphone that seals the ear.

FIG. 2 is a perspective view showing how the helmet communication device 1 is attached to the helmet 1000. FIG.
As shown in FIG. 2, the mounting adapter 30 (attached portion) is fixed to the left side portion of the helmet 1000 with double-sided adhesive tape or the like. The helmet communication device 1 is fixed to the helmet 1000 by attaching the helmet communication device 1 to the mounting adapter 30 so as to be engaged with it. It should be noted that how the helmet 1000 is locked will be described later.

FIG. 3(A) is a perspective view of the helmet communication device 1 as seen from the front side, and FIG. 3(B) is a perspective view as seen from the back side.
As shown in FIGS. 3A and 3B, a connection operation unit 40 is formed on the rear surface of the main unit 10. From above, a communication display 41, a power button 42, a charging display 43, a connection connector 44, an external A sound microphone hole 45 and a sound microphone mute knob 46 are arranged. A label 11 for displaying a company name, an administrative number, etc. is attached to the front surface of the main body 10, and a mounting adapter hook that engages with the mounting adapter 30 is attached to the back surface, as will be described later. Joining portions 12, 12 (mounting portions) are formed.

As shown in FIG. 3A, the sound generating section 20 at the bottom of the main body 10 has a substantially rectangular parallelepiped bulge 21 shorter than the front-rear length of the main body 10 at the center of the surface side. A front connecting portion 22 and a rear connecting portion 23 connected to the main body are provided in front and rear of the body.
As shown in FIG. 3B, an audio guide 24 (audio guide), which is a square concave portion that is open on the back side, is formed on the inner surface of the bulging portion 21, and an audio generating unit 50 (audio guide) is provided inside the audio guide 24. generation unit) is fixed. A voice microphone hole 25 is formed in the front connecting portion 22 , and a fall prevention body hole 26 is formed in the rear connecting portion 23 .

(A) to (H) of FIGS. 4 to 6 represent the outer shape of the helmet communication device 1 as a design drawing. That is, FIG. 4(A) is a reference perspective view of the helmet communication device 1 viewed from the surface direction, FIG. 4(B) is a front view, FIG. 5(C) is a rear view, FIG. 5(D) is a top view, 5(E) is a bottom view, FIG. 6(F) is a left side view, FIG. 6(G) is a right side view, and FIG. 6(H) is a reference perspective view seen from the back side. be.

FIG. 7 is an exploded view of the helmet communication device 1 viewed obliquely from the back side, and the internal configuration of the helmet communication device 1 will be described using this drawing.
As shown in FIG. 7 , the exterior case 60 of the helmet communication device 1 has a surface case 61 and a back case 62 made of resin, and a connection operation panel 63 that covers the connection operation section 40 . The back surface case 62 is configured to cover the body portion 10 of the front surface case 61 from the back surface side like a lid. A sound guide 24 which is a recess opening to the back side is formed in the lower part of the back side of the exterior case 60 .

Here, the exterior case 60 is configured to have a waterproof structure as a whole. That is, when assembling the front case 61 and the back case 62, they are watertightly assembled by fixing them with screws via O-rings 64 along the overlapping portions of the two. Instead of the O-ring 64, a waterproof double-sided tape or the like may be sandwiched to form a waterproof structure. Also, the connection operation panel 63 is assembled on the rear surface of the main body 10 using waterproof double-sided tape (not shown).

As shown in FIG. 7, the electrical-related section 70 has a main substrate 80, a battery 71 (battery), and an audio microphone 72 (audio microphone section). Mounted on the main board 80 are an antenna, a control circuit (not shown), a switch, an electric component 73 such as an LED, and a connector 44 . A cable from the audio generating unit 50 and a cable from the audio microphone 72 (not shown) are watertightly connected to the main substrate 80 via bushes.

As shown in FIG. 7, the communication display 41 and the charging display 43 are light guide tubes, and guide light from respective LEDs (not shown) mounted on the main board 80 to the outside. The power button 42 is made of a flexible material such as urethane rubber, and is configured so that a switch (not shown) on the main board 80 can be pressed through a hole in the surface case 61 . The connection connector 44 is a waterproof USB connector with packing, and is watertightly arranged so as to be connectable from the outside through a hole in the side surface of the surface case 61 . It should be noted that the connection connector 44 that can be connected from the outside may be detachably closed with a lid-like member. This is to prevent the powder from entering the connector 44 when the user U works in an environment where the powder is present.

As shown in FIG. 7, the external sound microphone hole 45 is water-tightly closed from the inside with a waterproof sheet 47, and the environmental sound is transmitted to the external sound microphone (not shown) on the main board 80. FIG. That is, the external sound microphone plays a role of picking up the surrounding volume. The audio microphone mute knob 46 switches an audio microphone mute changeover switch (not shown) on the main board 80 via a waterproof bush 48 and a click feeling imparting section 49 composed of a lever, a slide plate, a compression coil spring, or the like. The audio microphone mute knob 46 switches whether to mute the sound from the audio microphone 72, and which of the top and bottom is to be muted can be separately set as will be described later.

As shown in FIG. 7, the voice microphone hole 25 provided in the lower front portion of the rear case 62 is watertightly closed from the inside with a waterproof sheet (not shown). An audio microphone 72 held by an audio microphone anti-vibration holding portion 75 made of urethane rubber via a windshield foam material 74 for the windscreen inside the microphone hole 25 is arranged so as to receive the voice of the user U. It is configured.

FIG. 8 is an exploded view of the sound generation unit 50 viewed obliquely from the back side, and the configuration of the sound generation unit 50 will be described using this drawing.
As shown in FIG. 8, the sound generation unit 50 includes, from the back side, a front frame 51 (diaphragm holding portion), a diaphragm 52 (diaphragm) made of resin and acting as a diaphragm, an exciter 90 (exciter), It has a diaphragm damper 53 (first elastic body), a fixing plate 54, a rear frame 55 (diaphragm holding portion) and a sound generating unit mounting damper 56 (second elastic body). How these configurations work and how they are combined will be described later.

Next, the configuration of the exciter 90 used in this helmet communication device 1 will be described with reference to FIGS. 9A is a perspective view of the exciter 90 viewed from the front side, FIG. 9B is a perspective view of the exciter 90 viewed from the back side, and FIG. 9C is an exploded view of the exciter 90 viewed from the front side.

As shown in FIGS. 9A, 9B, and 9C, the exciter 90 has a substantially rectangular exciter frame 91 made of resin, and has a hollow portion in the center. At the center of this hollow portion, there is a substantially bottomed cylindrical vibration transmitting portion 92 , which is held by four substantially S-shaped dampers 93 , 93 , 93 , 93 so that the vibration transmitting portion 92 can freely vibrate. A bottomed portion at one end of the housing protrudes outside, and double-sided adhesive tape 94 is attached to the outer surface of this bottomed portion.

As shown in FIG. 9C, a cylindrically wound coil 95 is fitted to the cylindrical outer surface of the other end of the vibration transmitting portion 92 and fixed with an adhesive or the like. Both terminals of the coil 95 are connected to terminal plates 96,96. Like other exciters, the exciter 90 has a bottomed cylindrical yoke 97 and a permanent magnet 98 forming a magnetic circuit. is held so as to be positioned in the gap between When driving power is supplied to the coil 95 from the terminal plates 96, 96, the coil 95 moves forward through the gap between the yoke 97 and the permanent magnet 98, and is held by the four dampers 93, 93, 93, 93. The vibration transmitting portion 92 is configured to start vibration.

10(A) and (B) are sectional views of the helmet communication device 1. FIG. 10(A) shows the AA section in FIG. 4(B), and FIG. 10(B) shows the BB section. It shows a cross section.
As shown in FIG. 10A, the surface case 61 and the back case 62 of the exterior case 60 are watertightly assembled via an O-ring 64 . This is to prevent rain, powder, etc. from entering the inside of the exterior case 60 when the helmet communication device 1 is used in the rain or in a harsh place where there is a lot of powder. A main board 80 on which a battery 71 and an electric component 73 such as an antenna are mounted is held in the main body 10 of the helmet communication device 1 .

As shown in FIGS. 10A and 10B, the sound generation unit 50 is fixed to the sound generation section 20 below the vibration transmission section 92, and the exciter 90 is held by the sound generation unit 50. FIG.
8, 9, and 10A and 10B, the configuration and operation thereof will be described in detail.

As shown in FIGS. 8, 9 and 10B, one end of the vibration transmitting portion 92 of the exciter 90 is fixed via double-sided adhesive tape 94 to substantially the center of the back surface of the diaphragm 52 of the sound generation unit 50 . The diaphragm 52 is fitted into a groove provided inside a diaphragm damper 53 which is an elastic body made of a soft material such as urethane, and the diaphragm damper 53 is sandwiched between the front frame 51 and the rear frame 55. fixed as follows. The two holes in the bottom of the rear frame 55 are fitted into the grooves of the sound generating unit mounting damper 56 which is an elastic body. It is fixed to the part with a screw.

That is, as shown in FIG. 10B, the diaphragm 52 is separated by the diaphragm damper 53 and held by the front frame 51 and the rear frame 55 . Further, the exciter 90 fixed to the rear surface of the diaphragm 52 is held in the hollow portion of the watertight space created inside by the diaphragm 52 , the diaphragm damper 53 , the front frame 51 and the rear frame 55 . Further, the sound generation unit 50 is fixed and held within the sound guide 24 via a sound generation unit mounting damper 56 which is an elastic body.
The reason why the exciter 90 is held in a watertight space is that when the helmet communication device 1 is used in the rain or in a harsh place where there is a lot of powder, rain or powder may enter inside the exciter 90. to prevent intrusion

9(C) and 10(B), when the driving power of the audio signal is applied to the exciter 90, the magnetic circuit composed of the yoke 97 made of a magnetic material such as iron and the permanent magnet 98 becomes heavy. Therefore, the vibration transmitting portion 92 vibrates more. Then, the diaphragm 52 is vibrated by the vibration transmitting portion 92 of the exciter 90, and the sound generating unit 50 generates sound. It should be noted here that, for example, when a drive current with a loud deep bass sound is input, the magnetic circuit also vibrates greatly, and the back surface of the yoke 97 may collide with the inner wall of the hollow portion to generate an abnormal noise. Alternatively, a low-resilience urethane foam or the like may be sandwiched between the back surface of the yoke 97 and the inner wall.

As shown in FIG. 10(B), the sound generated by the sound generation unit 50 is surrounded by the sound guide 24 at the sides and the bottom, so the direction of the sound is guided, and the direction of the sound is guided by the opening of the sound guide 24. Sound is mainly transmitted in a certain back direction. That is, the generated sound is given directivity so that the sound is transmitted in the approximate direction of the user's ear, and the transmission of the sound in directions other than the approximate direction of the ear is reduced. It works to prevent the contents of the call from leaking to the outside.
Here, the voice guide 24 is shaped like a container for drinking water. It can be said that

As shown in FIG. 10B, the sound generation unit 50 is attached to the sound generation section 20 via the sound generation unit mounting damper 56, which is an elastic body. It works to reduce the transmission of In addition, this reduces the leakage of the generated sound to the outside of the sound generating unit 20, and the vibration is transmitted through the outer case 60 to the sound microphone 72 attached to the front part of the sound generating unit 20, resulting in howling. and microphone noise. As a result, the audio microphone 72 can be arranged in the vicinity of the audio generating unit 50, and the helmet communication device 1 can be made more compact.

FIG. 11 is a schematic cross-sectional view showing a CC cross section in FIG. 1, showing the positional relationship between the helmet communication device 1 attached to the helmet 1000 and the ears of the user U. As shown in FIG.
As shown in FIG. 11, the sound generated by the sound generation unit 50 has directivity due to the sound guide 24, and is transmitted in the direction of the ears of the user U, which is the back direction. In addition, the sound guide 24 and the sound generating unit mounting damper 56 serve to reduce leakage of the generated sound to the outside. This will prevent the content of the call from leaking to the outside.

Here, by attaching the voice guide 24 as shown in FIG. 11, the sound pressure of the voice transmitted to the ear is increased, and the voice band of the human voice in particular is increased, resulting in a sound quality that is easy to hear. Detailed contents such as frequency characteristics will be described later.

As described above, the sound generating unit 50 and the sound guide 24 surrounding the sides and bottom of the sound generating unit 50 and having an opening substantially in the direction of the ear are provided. It has a predetermined spacing with respect to the part. With this configuration, even with the use of the small exciter 90, sufficient sound pressure and sound quality that is easy for the user U to listen to can be obtained.
In this way, by using a small exciter 90, it becomes possible to reduce the size and weight of the exciter 90, and the power consumption can be reduced.

Now, how the helmet communication device 1 operates will be described with reference to FIGS. 12 and 13. FIG.
FIG. 12 shows that a user U, who wears a helmet 1000 to which the helmet communication device 1 is attached, makes a call using the helmet communication device 1 via a portable terminal S such as a smartphone worn by the user. It is a schematic diagram seen from the left direction showing a situation in which.

FIG. 13 is a circuit block diagram showing details of how FIG. 12 works.
As shown in FIG. 13, the main substrate 80 has a control section 81, the battery 71 is connected to the control section 81 via the power supply section 82, and the display section 83 and the operation section 84 are connected to the control section 81 via respective interfaces. ing.

As shown in FIG. 13, the exciter 90 is driven by an exciter driving section 85 connected to the control section 81 . The audio microphone 72 and the external sound microphone 86 are connected to the control section 81 via an audio microphone signal processing section 87 and an external sound microphone signal processing section 88, respectively. Further, the control section 81 is connected to a communication section 89 (communication section), and is configured to communicate with the portable terminal S via the communication section 89 .

In FIG. 13 , when an external cable (not shown) is connected to the USB connector that is the connector 44 , the battery 71 is charged via the power supply section 82 . At this time, an LED (not shown) that emits light to the display section 83 operates to light the charging display 43 in red, and turns off when the charging is completed. Also, the firmware of the control unit 81 can be updated, etc., while the external cable is connected to the connector 44 .

In FIG. 13, when the power button 42, which is one of the operation units 84, is pressed for a long time, the helmet communication device 1 is activated. Here, when the power is turned on for the first time, the pairing mode is automatically set, and the communication display 41 blinks red and blue alternately. Since the communication unit 89 is configured to be capable of wireless communication by connecting to the portable terminal S via Bluetooth (registered trademark), if pairing is performed here, the connection is automatically established thereafter. The state of waiting for connection with the mobile terminal S and the state of being connected are displayed by different ways of blinking blue of the communication display 41 . In addition, while being connected to the mobile terminal S, it is possible to update the firmware and perform various settings of the helmet communication device 1 using the mobile terminal S.

Further, in FIG. 13, an acceleration sensor (not shown) is provided as the operation unit 84, and a tap operation can be performed by tapping the surface of the helmet communication device 1 or the helmet 1000 with the palm. For example, when a phone call comes in, tap once to enable the call, and tap again to hang up. Also, tap twice to launch a voice assistant such as Siri (registered trademark) or Google Assistant (registered trademark).

In FIG. 13, by switching the audio microphone mute knob 46, which is another one of the operation units 84, it is possible to switch whether to mute the sound from the audio microphone 72 as described above. It should be noted that the portable terminal S is configured to be able to set which of the upper and lower sides of the audio microphone mute knob 46 is to be muted. This is for giving priority to user U usability.

Here, the reason why the audio microphone mute knob 46 is not a push button but a mechanical switching knob is that the user U can grasp the switching without looking. Since the audio microphone mute knob 46 protrudes from the main unit 10, the user U can operate the audio microphone mute knob 46 even when wearing gloves, gloves, or the like.

In FIG. 13, the ambient sound microphone 86 is for the automatic volume control function. That is, first, using the mobile terminal S, if the volume by the exciter 90 is adjusted, after that, according to the volume of the surrounding noise, etc., the volume increases when the noise increases, and the volume automatically decreases when it becomes quiet. is configured as follows.

In FIG. 13, a voice microphone 72 is for picking up the voice of the user U during a call or the like. Here, as shown in FIG. 1, the position of the audio microphone 72 is not set near the mouth by using an arm as in the conventional art, but is placed at a distance from the mouth. It has been confirmed by the inventors that the microphone can sufficiently pick up the voice of the user U even at a position a little away from the mouth as described above, unless the microphone is highly directional.

FIG. 14 shows the helmet communication device 1 and the attachment adapter 30 fixed to the helmet 1000 .
With reference to FIG. 14, how the helmet 1000 of the helmet communication device 1 is locked will be described.

As shown in FIG. 14, the mounting adapter 30 has a fixing surface 31 whose back surface is fixed to the helmet 1000 with a double-sided adhesive tape or the like, mounting adapter engaged portions 32, 32 at the front and rear ends of the fixing surface 31, and a substantially U-shaped portion. guide groove 33, and a lock claw 34 at the upper end. In addition, a fall prevention mounting adapter hole 35 is formed in the rear portion of the lower end portion.
In addition, on the back side of the body portion 10 of the helmet communication device 1, in addition to the mounting adapter engaging portions 12, 12, a guide rib 13 corresponding to the guide groove 33 and a locking claw 34 are slightly recessed in a band shape so as to slide. A pawl guide recess 14 is formed.

In FIG. 14, when the helmet communication device 1 is pressed against the upper portion of the mounting adapter 30, the guide rib 13 enters the guide groove 33, and when the mounting adapter engaging portions 12, 12 are pushed down, the mounting adapter engaged portions 32, 32 engage in. Further, the lock claw 34 slides in the lock claw guide concave portion 14 and when pushed down, the lock claw 34 locks the upper end portion of the lock claw guide concave portion 14 .

As shown in FIG. 14, it is preferable to connect the drop-preventing main body hole 26 and the drop-preventing mounting adapter hole 35 with fall-preventing strings 36 , 36 . Even if the user U wearing the helmet 1000 on his/her head accidentally detaches the helmet communication device 1 from the helmet 1000 while working in a high place, for example, the helmet communication device 1 can This is to prevent the helmet communication device from being dropped, lost, broken, or hit by another person.

As shown in FIG. 14, a connection lock portion 37 may be provided in the middle or at the end of the fall prevention cords 36 , 36 . With such a configuration, it is possible to separate the helmet communication device 1 from the helmet 1000 by the coupling lock portion 37 and charge the helmet communication device 1 alone.
Although the fall prevention string 36 is used here, it is of course possible to use a fall prevention wire or the like.

As described above, in the helmet communication device 1 of the present embodiment, the sound generating section 20 has the sound generating unit 50 having the diaphragm 52 and the exciter 90 fixed to the diaphragm 52 and vibrating the diaphragm 52 to generate sound. are doing. The diaphragm 52 is arranged in the vicinity of the outer side of at least one ear of the user U, and the diaphragm 52 is directed substantially toward the ear, so that sound is transmitted to the ear. It is possible to obtain a communication device for a helmet that is easy to hear and easy to use even in a place where the surrounding noise is loud without having to close the ears like earphones and headphones.

In addition, the sound generating section 20 has a sound guide 24 that surrounds the sides and bottom of the sound generating unit 50 and that is open substantially in the direction of the ear. It has a predetermined spacing. With this configuration, the sound pressure in the vocal band of the human voice is increased to generate a sound that is easy to hear, and the generated sound is imparted with directivity so that the sound is transmitted substantially in the direction of the ear of the user. In addition, it is possible to reduce the transmission of sound in directions other than the general direction of the ear, thereby preventing the contents of the call from leaking to the outside.

The sound generating unit 50 also has a front frame 51 and a rear frame 55 separated from the diaphragm 52 via a diaphragm damper 53 . The exciter 90 is held in a space formed by the diaphragm 52, the diaphragm damper 53, the front frame 51 and the rear frame 55, and the front frame 51 and the rear frame 55 form a sound guide. 24, the vibration energy generated by the exciter 90 concentrates and vibrates the diaphragm 52 to efficiently generate sound, and the vibration is transmitted to other parts of the helmet communication device 1. It is possible to reduce the leakage of sound to the outside.

The front frame 51 and the rear frame 55 are fixed to the audio guide 24 via the audio generating unit mounting damper 56, and the audio microphone 72 is a built-in microphone housed inside the helmet communication device 1. is. By configuring in this way, it is possible to reduce the leakage of the generated sound to the outside of the helmet communication device 1 . In addition, it is possible to reduce howling caused by being transmitted to the audio microphone 72 through the exterior case 60 of the helmet communication device 1 . In addition, this allows the audio microphone 72 to be arranged near the audio generating unit 50, thereby making it possible to reduce the size of the helmet communication device 1. FIG.

The helmet 1000 has a substantially hemispherical cap body, a battery 71 (battery) as a power source of the helmet communication device 1 is housed in the main body 10, and the helmet communication device 1 is attached to the helmet 1000. The main body 10 is positioned substantially above the end of the side of the cap body 1100, and the sound generating part 20 provided at the bottom of the main body 10 is substantially below the end of the side of the cap 1100. is configured to be located in Therefore, the body part 10 is stably held by the cap body 1100, and the sound generating part 20 can transmit sound with directivity toward the ear. Further, since the power source and the like are configured to be integrated with the helmet communication device 1, a connection wire from the power source is not required, and the helmet 1000 is less protruded, making it easier to use.

In addition, in this embodiment, a call is made via a mobile terminal S such as a smart phone, so that it can be very conveniently used for contacting a construction site or the like.
For example, if a group call function such as Facebook (registered trademark) messenger is used, regular communication with all workers at a construction site, etc., and emergency communication in the event of an emergency can be easily realized.
Further, for example, at construction sites such as tunnel construction deep in the mountains, by installing a mobile base station for a mobile communication system, it is possible to easily realize communication with the head office and communication between workers.

Moreover, not only the call function of the mobile terminal S but also other functions such as an audio reproduction function can be utilized.
For example, in the case of work involving a complicated process that is performed alone, if the process along the procedure is recorded in advance in the mobile terminal S by voice and played back by voice at the site, it will be possible to skip the procedure. It is possible to use both hands to perform tasks that do not require hands.
Further, for example, it is possible to perform inspection without omission while having the portable terminal S read aloud the final inspection items and the like in each work.

As shown in FIG. 3A, in this embodiment, a label 11 for displaying a company name, a control number, etc., can be attached to the surface of the main body 10. It is not limited to this. The label 11 may be printed directly on the surface of the body portion 10 instead of being attached. In addition, it is also possible to attach a memorandum of the contents of the work on the day and precautions associated with the work so that all the workers can call attention to the work.

Further, as shown in FIG. 12, in the present embodiment, the helmet communication device 1 is configured to make a call via a mobile terminal S such as a smart phone, but it is not limited to this. For example, if the communication unit 79 is added with a radio function such as an ordinary intercom, the helmet communication device 1 alone can make a call.

(Second embodiment)
A second embodiment of the present invention will be described with reference to FIG.
In the second embodiment, as in the first embodiment, the helmet communication device 1 has the main body 10 and the sound generation section 20, but the structure and mounting position of the sound microphone 72 (sound microphone section) are different. different. Hereinafter, the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and only the different parts are described.

FIG. 15 is a usage diagram showing a situation in which a user U wearing a helmet 1000 to which the helmet communication device 1 is attached on the left side is making a call using the helmet communication device 1 . Here, the audio microphone 72 is not built in the helmet communication device 1 but is externally attached to the helmet communication device 1 .

That is, as shown in FIG. 15, the audio microphone 72 has a microphone arm portion 76. One end of the microphone arm portion 69 is fixed in front of the lower portion of the audio generating portion 20, and the other end is used to connect the audio microphone 62 to the user U. It is configured to be held near the mouth.

By holding the voice microphone 72 near the mouth of the user U by using the arm portion 76 in this way, it becomes easier to capture the voice of the user U more reliably than with a built-in microphone, and the use of the voice microphone 72 becomes easier. The person U can talk in a low voice.

When the audio microphone 72 is arranged near the mouth, when the helmet 1000 is lifted, the audio microphone 72 crosses the face vertically while being in contact with the face. That is, when the helmet 1000 is attached or detached, it is necessary to flip up the microphone arm portion 76 to move the audio microphone 72 away from the mouth.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. 16 to 18. FIG.
In the third embodiment, the helmet communication device 1 has a main body 10 and a voice generating part 20 in the same manner as in the first embodiment, but the shape of the voice guide 24 is different. Hereinafter, the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and only the different parts are described.

16(A) is a perspective view of the helmet communication device 1 viewed from the front side, FIG. 16(B) is a perspective view of the helmet communication device 1 viewed from the back side, and FIG. 17 is a DD cross section in FIG. 16(A). It is a cross-sectional view showing the.
FIG. 18 shows the case of the cylindrical audio guide 24 of the first embodiment, the case of the parabolic audio guide 24 of the present embodiment, and the case of no audio guide 24, 5 cm from the audio generating unit 50. 5 is a graph showing frequency characteristics measured at distant positions; The distance of 5 cm is a rough distance from the sound generator 20 to the eardrum of the ear.
Here, the voice band, which is the frequency range of human voice, is said to be approximately 100 Hz to 1000 Hz.

As shown in FIGS. 16B and 17, the sound guide 24 of this embodiment surrounds the sides and bottom of the sound generation unit 50 and opens in the approximate direction of the ear, as in the first embodiment. However, the cross-sectional shape is different. The audio guide 24 is spaced from the side of the audio generator 20 such that the cross section thereof forms a part of a substantially parabola.
Here, since the shape of the voice guide 24 has a substantially parabolic shape in cross section like a container for drinking alcohol, it can be said that a parabolic voice guide is formed.

Here, in the voice guide 24 of the present embodiment, the voice generated by the voice generation unit 50 is transmitted with directivity in the direction of the user U's ears, as in the first embodiment. be. In addition, the voice guide 24 serves to reduce leakage of the generated voice to the outside. This will prevent the content of the call from leaking to the outside.

As shown in FIG. 18, in the case of the first embodiment and the voice guide 24 of the present embodiment, compared with the case without the voice guide 24, there is a large improvement of about 10 dB or more in the voice band range of 100 Hz to 1000 Hz. be seen. Without the audio guide 24, only sounds above 2000 Hz are emphasized, resulting in a so-called small radio-like rustling sound. This indicates that the sound is easy to hear.

As shown in FIG. 18, comparing the case of the voice guide 24 of the first embodiment with that of the present embodiment, the first embodiment shows a greater improvement in the bass part of the voice band, especially around 150 Hz. As can be seen, it can be seen that the high-pitched part is slightly improved in this embodiment. This is because the sound in the low-pitched part tends to diffuse as the distance increases, but in the first embodiment, the opening of the audio guide 24 is smaller than in the present embodiment, making it difficult to diffuse. It seems that it is due to In addition, in the high-pitched part, the parabolic shape of the voice guide 24 seems to be more effective in the first embodiment.

Here, when the sound of the helmet communication device 1 of the first embodiment and the third embodiment is listened to by an actual prototype, it is found that the human voice can be heard naturally and clearly. This is because the sound pressure in the vocal band has increased, the bass part of the vocal band has been firmly output, so the voice has become thicker, and the overtones of the voice have come out, so the voice has become closer to natural. etc. is considered to have an effect. Also, here, when music is played back, it sounds normal, but in music with vocals, the voice part of the person is emphasized and heard clearly, and the sound part of the instrument sounds a little behind, not emphasized. there were. In any case, the fact that human voices can be heard clearly and naturally means that we have obtained the most suitable voice generator 20 for the communication device.

That is, in normal use, the exciter 90 is configured to be fixed to a large-area diaphragm to produce sound. And when it is fixed to a diaphragm with a small area, it has been said that only high-pitched sounds can be produced. In fact, without the sound guide 24 of the sound generation unit 50, which is a diaphragm with a small area, only sounds of 2000 Hz or higher are emphasized.
In the present invention, by providing a voice guide around the voice generation unit 50 to form the voice generation section 20, even with a diaphragm having a small area, it is possible to produce sounds in the vocal range of the human voice. This is an application of this configuration.
Further, since the voice generation unit 20 can be configured to be small, it is possible to form a small helmet communication device 1 . The small helmet communication device 1 does not get in the way and can be usefully used even when working in a narrow place.

(Fourth to Sixth Embodiments)
Fourth to sixth embodiments of the present invention will be described with reference to FIGS.
In these embodiments, as in the first embodiment, the helmet communication device 1 has the main body 10 and the sound generation section 20, but the shapes and configurations of the sound generation unit 50 and the sound guide 24 of the sound generation section 20 are different. is different. In the following description, the drawings and descriptions of the parts such as the main body 10 that are the same as those of the first embodiment are omitted, and the voice generation unit 50 and the voice guide 24, which are different parts, are schematically shown in the drawings and described. do. Also, for the convenience of explanation, the upper part of the figure is described as the upper part and the lower part is the lower part.

FIGS. 19A, 19B, and 19C show fourth to sixth embodiments, respectively. The sound generating unit 50 of the sound generating section 20 of these embodiments has a circular shape when viewed from above, and the exciter 90 housed in the sound generating unit 50 also has a circular shape when viewed from above. , are similar in function to the rectangular one of the first embodiment.

A fourth embodiment will be described with reference to FIG.
As shown in FIG. 19(A), the sound generation unit 50 has a circular, flat, watertight, substantially cylindrical box shape with a space inside. In the figure, the upper surface is partitioned by a bellows-shaped diaphragm damper 53 made of an elastic material, and the surface of the inner diameter portion of the upper surface serves as a diaphragm 52 having an exciter 90 fixed to the back surface. A diaphragm holding frame 57 (diaphragm holding portion) is formed from the diaphragm damper 53 on the upper surface to the outer diameter portion, the side surface, and the bottom portion, and the front frame 51 and the rear frame 55 in the first embodiment are combined. It is like The sound generating unit 50 is fixed to the sound guide 24 via sound generating unit mounting dampers 56, 56 (second elastic bodies).

As shown in FIG. 19(A), the sound guide 24 has a shallow cylindrical shape with a bottom, surrounds the sides and bottom of the sound generating section 20, and opens upward, roughly in the direction of the ear. It is in the shape of a tubular audio guide. The audio guide 24 is spaced substantially uniformly from the sides of the audio generator 20 . Then, the sound generated by the sound generation unit 50 is transmitted to the ear of the user U with directivity by the sound guide 24 . In addition, the voice guide 24 serves to reduce leakage of the generated voice to the outside. This will prevent the content of the call from leaking to the outside.

As described above, in this embodiment, the exciter 90, the audio guide 24, and the audio generating unit 50 all have round shapes when viewed from above. Of course, this shape may be elliptical, elliptical, or any other shape. Also, although the sound generation unit mounting dampers 56, 56 of this embodiment are shown as two elastic bodies, more may be provided, or the same configuration as in the first embodiment may be used. is of course.

Moreover, although the upper portions of the sound generation unit 50 and the sound guide 24 are substantially at the same height, the height is not limited to this. For example, the height of the sides of the audio guide 24 may be made higher. In this case, it is considered that the directivity is further enhanced. Alternatively, for example, the height of the sides of the audio guide 24 may be made lower. In this case, the directivity is considered to be slightly lower, but of course, various changes may be made as necessary.

A fifth embodiment will be described with reference to FIG.
Since the fifth embodiment has the same configuration as the fourth embodiment, the same parts as in the fourth embodiment are denoted by the same reference numerals, the description thereof is omitted, and only the different parts are described. do.

As shown in FIG. 19(B), the sound generating unit 50 of this embodiment also has a thin, substantially cylindrical box shape like the fourth embodiment, but the place where the diaphragm damper 53 separates is different. In the figure, the box-shaped upper surface and upper side surfaces form a diaphragm 52 , a diaphragm damper 53 is located in the middle of the side surface, and a diaphragm holding frame 57 is formed on the lower and lower side surfaces. With this configuration, the entire upper surface can be used as the diaphragm 52 to be vibrated by the exciter 90, and sound can be generated over a wider area.

As shown in FIG. 19(B), the audio guide 24 is spaced from the sides of the audio generating section 20 so that it becomes wider toward the top, and has the shape of a truncated conical audio guide. . By gradually widening the shape of the voice guide 24 toward the opening in this way, the peak of the bass portion of the voice band is lowered, but the mid-to-high range portion is slightly increased. It is considered to be a thing. Here, for example, it is of course possible that the width gradually narrows toward the opening. In this case, it is considered that the bass reaches far and the bass is emphasized.

Then, the sound generated by the sound generation unit 50 is transmitted toward the ears of the user U by the sound guide 24 . In addition, the voice guide 24 serves to reduce leakage of the generated voice to the outside. This will prevent the content of the call from leaking to the outside.

A sixth embodiment will be described with reference to FIG.
Since the sixth embodiment has the same configuration as the fourth embodiment, the same parts as in the fourth embodiment are denoted by the same reference numerals, the description thereof is omitted, and only the different parts are described. do.

As shown in FIG. 19(C), the voice generating unit 50 of the present embodiment also has a thin, substantially cylindrical box shape as in the fourth embodiment, but the place where the diaphragm damper 53 separates is different. In the figure, the upper, side and lower outer diameter portions of the box form a diaphragm 52, the diaphragm damper 53 is located in the middle of the lower surface, and the inner diameter portion of the lower surface serves as a diaphragm holding frame 57. there is With this configuration, the diaphragm damper 53 can be arranged so as not to be seen from the outside, and the diaphragm damper 53 made of a flexible elastic body can be prevented from being damaged.

As shown in FIG. 19(C), the audio guide 24 has a structure in which the upper part is tilted in the same horizontal direction. This is to deliver more of the sound generated by the unit 20 . In addition to the side plate of the audio guide 24, for example, a plurality of elongated blade-like ones arranged in parallel with a slant, so to speak, a so-called louver-like one arranged above the audio generating unit 50, is used to generate the sound. , of course, may be directed.

As shown in FIG. 19C, the central portion of the diaphragm holding frame 57 at the bottom of the sound generating unit 50 bulges downward, and the central portion of the bottom surface of the audio guide 24 also bulges downward. In this way, by bulging the bottom downward, the space above and below the central portion of the sound generation unit 50 is expanded, and this space can be used to mount a larger exciter 90. . When the exciter 90 is made larger, power consumption increases, but more powerful sound can be generated.

In the fourth to sixth embodiments described above, modified examples of the first to third embodiments are shown, but it is of course possible to add further modifications.
That is, in the above embodiment, the upper portion of the audio guide 24 is entirely open and serves as an opening, but the present invention is not limited to this.
For example, in the fourth embodiment, the upper surface may be formed by covering the upper portion of the audio guide 24 with slightly raised side surfaces with a plate-like object with a hole. . In this case, although the area of the opening is reduced, it is considered possible to obtain sound with a more emphasized low-pitched sound from the hole of the opening on the top surface.

In addition, although the bottom surface of the sound generation unit 50 of the fourth to sixth embodiments is simply plate-shaped, it is not limited to this. Acoustic parts may be placed here.
For example, a so-called passive radiator type diaphragm may be arranged in the substantially central portion of the lower surface of the sound generating unit 50 of the fourth to sixth embodiments. In this case, the generated sound would be even better.

Also, although the sound generating unit 50 of the fourth to sixth embodiments has been described as being watertight, the present invention is not limited to this. This is because it does not need to be watertight as long as it is used indoors or inside a car.
For example, a hole is made in the substantially central portion of the lower surface of the sound generation unit 50 of the fourth to sixth embodiments, and a through hole is also formed in the lower surface of the sound guide 24 corresponding to this hole. can be configured to By doing so, the sound generating unit 50 has a structure similar to that of a so-called bass reflex speaker, and the generated sound is considered to be even better.

Further, for example, in the sound generation unit 50 of the fourth to sixth embodiments, the sound generation unit 50 is composed of the diaphragm 52, the diaphragm damper 53, and the diaphragm holding frame 57, but is not limited to this.
For example, the diaphragm damper 53 and the diaphragm holding frame 57 may be formed integrally with an elastic body and used together, and a hole may be provided in the upper surface, and the diaphragm 52 may be fitted into the hole or fixed with an adhesive or the like. may be configured. By configuring in this way, the number of parts can be reduced. Further, in this case, the sound generating unit mounting dampers 56, 56 may also be added and constructed integrally with an elastic body so as to be shared.

In the above first to sixth embodiments, the helmet to which the helmet communication device 1 is attached has been described as a work helmet or an industrial protective cap, but it is not limited to this. For example, it is a matter of course that the present invention may also be applied to bicycle helmets and semi-cap type helmets with protruding ears used for small motorcycles and the like.

That is, there are services such as UberEats (registered trademark) that deliver meals ordered by smartphones, but these delivery workers use bicycles or small motorcycles. If these delivery workers use a helmet to which the helmet communication device 1 is attached, the delivery destination can be navigated by voice and guidance can be provided, and communication with the headquarters is facilitated. In addition, on noisy roads or in quiet residential areas, the volume automatically changes, making it convenient to use.
In addition, it can be effectively used in other delivery industries using small motorcycles and the like.

Also, for example, it may be applied to a sports helmet.
For example, in a snowboarding classroom, instructors and students wear snowboarding helmets. If the helmet communication device 1 is attached to these helmets, all the members can share the instructor's guidance for the student's performance etc. and the voice of the student's question and answer etc. by using the group voice chat function. It becomes possible. Some snowboarding helmets have ear pads, but even in this case, they are configured so that external sounds can be heard.
In addition, it can be effectively used in other sports such as skiing and skateboarding.

(Seventh embodiment)
A seventh embodiment of the present invention will be described with reference to FIG.
Unlike the first embodiment, the seventh embodiment is not the helmet communication device 1 but one of the application examples utilizing the sound generating section 20 of the present invention. The present invention relates to a neck communication device 2000 that can be used by a user U who is riding a bicycle without a bicycle. Hereinafter, the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof is omitted, and only the different parts are described.

FIG. 20 shows a state in which a user U who wears the neck-mounted communication device 2000 of this embodiment around his/her neck is enjoying a call via the mobile terminal S. As shown in FIG.
As shown in FIG. 20, the neck-mounted communication device 2000 has a substantially C shape, is worn with an opening at the front of the neck, and is flexible, so that it can be worn from the neck. It is configured to be detachable. A voice microphone 72 is arranged inside the portion near the opening, and an external sound microphone 86 is arranged outside, so that the voice of the user U and the external sound can be captured, respectively.

As shown in FIG. 20, in the portion near the ear of the neck communication device 2000, the left and right sound generators 20, 20 are arranged so as to face substantially the direction of the ear.
Thus, by using the voice generator 20 of the present invention, it is possible to clearly hear the voice of the other party in a conversation with a natural feeling. Consumption can also be reduced. That is, the neck-mounted communication device 2000, which enables comfortable communication, can be reduced in size and weight and can be used for a long time.

The sound generator 20 can also be expressed as follows.
A sound generating device using an exciter, wherein the sound generating device has a sound generating unit and a sound guide, and the sound generating unit has a diaphragm and an exciter fixed to the diaphragm and vibrating the diaphragm to generate sound. and wherein the audio guide surrounds the sides and bottom of the sound generating unit and has a predetermined spacing to the sides of the sound generating unit.

As described above, the voice generating section 20 can be used for a variety of applications because it can clearly hear human voices with a natural feeling as described above, and can be reduced in size, weight, and power consumption. can.
For example, it can be applied to a wireless hand-held speaker that is mainly used by elderly people to listen to the sound of the television at hand. In particular, since human voices are emphasized and heard clearly, it is possible to listen well to the contents of conversations in television programs, which is convenient for use.

It can also be applied to smart speakers, for example. When using a smart speaker as a secretary to read aloud schedules, emails, materials, etc., the voice generation unit 20 that emphasizes and clearly hears the human voice can be conveniently used. Moreover, it is of course possible to make a call via the portable terminal S hands-free. In this case, a speaker for reproducing music may be provided separately from the sound generator 20, and the sound generator 20 may be used exclusively for sound generation. This is because each can be used optimally.

Further, for example, since the sound generating section 20 has strong directivity and good sound localization, it can be conveniently used for games. For example, if a plurality of sound generators 20 are arranged on the left and right sides of the head of the gaming chair, it is possible to grasp the situation such as the opponent's footsteps and the position of the ally by the sound, and the game can be advanced in an advantageous manner. can be done.

The helmet communication device of the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.
For example, in the embodiment described above, the helmet communication device is configured to be detachable from the helmet, but it may be configured to be integrated with the helmet from the beginning. In this case, the side portion of the cap body of the helmet is configured to extend slightly downward. By configuring in this way, the number of constituent parts can be reduced, and simplification can be achieved.

U user S portable terminal 1 helmet communication device 10 main body 11 label 11 attachment adapter engaging portion 13 guide rib 14 lock claw guide concave portion 20 sound generating portion 21 bulging portion 22 front connecting portion 23 rear connecting portion 24 voice guide 25 Voice microphone hole 26 Drop prevention body hole 30 Mounting adapter 31 Fixing surface 32 Adapter engaged part 33 Guide groove 34 Lock claw 35 Drop prevention mounting adapter hole 36 Drop prevention string 37 Connection lock part 40 Connection operation part 41 Communication display 42 Power button 43 Charging indicator 44 Connector 45 External sound microphone hole 46 Audio microphone mute knob 47 Waterproof sheet 48 Waterproof bush 50 Sound generation unit 51 Front frame 52 Diaphragm 53 Diaphragm damper 54 Fixed plate 55 Rear frame 56 Sound generation unit attachment Damper 57 Diaphragm holding frame 60 Exterior case 61 Front case 62 Back case 63 Connection operation panel 64 O-ring 70 Electrically related parts 71 Battery 72 Audio microphone 73 Electric parts 74 Windshield foam material 75 Audio microphone anti-vibration holding part 76 Microphone arm Unit 80 Main substrate 81 Control unit 82 Power supply unit 83 Display unit 84 Operation unit 85 Exciter driving unit 86 External sound microphone 87 Audio microphone signal processing unit 88 External sound microphone signal processing unit 89 Communication unit 90 Exciter 91 Exciter frame 92 Vibration transmission unit 93 Damper 94 Double-sided adhesive tape 95 Coil 96 Terminal plate 1000 Helmet 1100 Cap body 1200 Chin strap

Claims (7)

A helmet communication device that can be attached to the helmet so that a user wearing the helmet on the head can talk,
The helmet communication device has a body portion having a communication portion, and a voice generation portion and a voice microphone portion at the bottom of the body portion,
The sound generation unit includes a sound generation unit having a diaphragm and an exciter fixed to the back surface of the diaphragm for vibrating the diaphragm to generate sound,
The diaphragm is arranged near the outside of at least one ear of the user,
A communication device for a helmet, wherein the diaphragm faces substantially toward the ear, and is configured to transmit sound to the ear. The sound generation unit has a sound guide that surrounds the sides and bottom of the sound generation unit and is open in a direction substantially toward the ear,
2. The helmet communication device according to claim 1, wherein said voice guide has a predetermined distance from the side of said voice generation unit. The sound generation unit has a diaphragm holder separated from the diaphragm via a first elastic body,
The exciter is held in a space formed by the diaphragm, the first elastic body, and the diaphragm holder,
3. The helmet communication device according to claim 2, wherein the diaphragm holder is fixed to the voice guide. The diaphragm holding portion is fixed to the sound guide via a second elastic body,
4. The helmet communication device according to claim 3, wherein the audio microphone section is a built-in microphone housed inside the helmet communication device. The helmet has a substantially hemispherical cap body,
A battery that is a power supply for the helmet communication device is housed in the main body,
When the helmet communication device is attached to the helmet, the main body portion is positioned substantially above the end of the side portion of the cap body, and the sound generating portion provided at the lower portion of the main body portion is positioned near the cap. 5. The helmet communication device according to claim 1, wherein the helmet communication device is configured to be positioned substantially below the end of the side of the body. 6. The helmet communication device according to claim 1, further comprising an attachment portion for detachably attaching the helmet communication device to the helmet. 7. The helmet phone according to claim 6, wherein the helmet has an attached portion corresponding to the attaching portion, and the attaching portion and the attached portion are configured to be connectable with a string or wire. Device.

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