JP3068449U - Helmet bone conduction transmitter / receiver - Google Patents

Abstract

(57) [Abstract] (with correction) [Problem] A bone conduction transmitter capable of detecting a clear voice signal with little variation in detection sensitivity due to individual differences and a small muffled feeling, and deterioration of intelligibility of a received voice due to external noise. Less,
Provided is a bone conduction transmission / reception device for a helmet that can be attached to a connection cord of the helmet. A bone conduction transmitter is attached via a flexible member or a base member having a bent portion. Further, the handset is housed inside a donut-shaped ear pad, and the exterior member is provided with a locking portion for fixing to a connection belt from a helmet.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention detects bone-conducted vibrations caused by uttered voices transmitted to the human pinna, and receives electric signals with a bone-conducted transmitter that outputs as electric signals in order to perform clear transmission and reception in high noise. The present invention relates to a communication device for a helmet provided with a receiver for converting to voice, an ear pad for shielding external noise, and an exterior member.

[0002]

[Prior art]

 Such a bone conduction transmitter detects a bone conduction vibration caused by vocal vocalization as an electric signal by a detecting element such as a piezoelectric ceramic element, and the bone conduction transmitter / receiver uses the above bone conduction transmitter as a receiver. By providing the function, both functions of transmitting and receiving are provided. A common method for detecting human voice is to detect air vibration at the mouth of a person using, for example, an electret condenser type transmitter. A bone-conducting transmitter with a small number is suitable.

In recent years, as disclosed in JP-A-172794, a bone conduction sound to a human pinna is detected by converting it into an electric signal by a piezoelectric ceramic element, and is affected by external noise. A technique that has been made difficult has been proposed. By the way, in order to effectively detect the above-mentioned bone conduction vibration, the detection part of the bone conduction transmitter is pressed against the inside of the ear canal, but there is a difference in detection sensitivity due to individual differences in the external ear shape and differences in contact pressure. Also, there was a problem in that the clarity was reduced due to the large attenuation of the high frequency part of the audio signal, and it was unsuitable for long-term use due to a sense of incongruity. In addition, the external auditory canal was not sealed during high noise, so external noise was mixed in and the received voice could not be heard.

[0004]

[Problems to be solved by the invention]

 The present invention has been made in view of the above-mentioned problems, and reduces the sensitivity of bone conduction vibration detection to individual differences and the effect of wearing, while transmitting highly sensitive and clear bone conduction voice to the other party. Another object of the present invention is to provide a bone conduction transmission / reception device which can be used by being attached to a helmet which has already been used so that noise can be cut off so that the reception voice can be clearly heard.

[0005]

[Means for Solving the Problems]

 The above-mentioned problem is to reduce the thickness and weight of the bone conduction transmitter, put a flexible material such as foamed resin between the bone conduction transmitter and the base material, and make the flexible material thicker than the bone conduction transmitter. Constitute. The thicker flexible material provides stable detection sensitivity even when there are individual differences on the side of the face and variations in how the chin straps are tightened. The receiver will be of a relatively large size and will be positioned opposite the pinna, and will be surrounded by a bone conduction transmitter and ear pads to prevent external noise. Further, the connection belt connecting the helmet and the chin strap is sandwiched between the grooves of the bone conduction transmission / reception device, and the transmission / reception conditions can be adjusted to the optimal transmission / reception conditions by the locking portion which can be fixed at an arbitrary position.

[0006]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a sectional view of the present invention. In the figure, the bone conduction transmitter 1 has an outer diameter of 18 mm to 10 mm and a thickness of 1 mm to 2 mm. The exterior is made of light synthetic resin, and the case contains a vibration sensor in which piezoceramic is attached to a metal plate. The bone conduction transmitter 1 is fixed between a metal plate or a base member A3 made of synthetic resin via a flexible material 8 having a thickness of about 2 mm to 5 mm made of urethane foam resin or the like. A detection signal from the bone conduction transmitter 1 is transmitted to a wireless device or the like (not shown) by a cable 10. A part of the cable 10 is fixed to the cover member 4 by a guide 9. The receiver 2 is fixed substantially at the center of the base member A3, and the reception signal is supplied by a cable 10. A donut-shaped ear pad 7 is fixed around the base member A3 so as to be sandwiched by the cover member 4. FIG. 2 shows a state in which the bone conduction transmission / reception device of the present invention is fixed to the connection belt 12 of the helmet 11. The cover member 4 is provided with two groove portions 6 for accommodating the connection belt 12, and is fixed to an arbitrary position of the connection belt 12 by the locking member 5 and the fixing screw 14. FIG. 3 shows a state in which the bone conduction transmission / reception device of the present invention is mounted. The bone conduction transmission / reception device fixed to the connection belt 12 is closely attached to the face side portion 15 via the ear pad 7 by tying the chin strap 13. An ear ring 19 and an earlobe 18 are fitted inside the ear pad 7 so that the bone conduction transmitter 1 is in close contact with the face side portion 15 below the earlobe 18 to detect bone conduction vibration.

FIGS. 4 and 5 show another embodiment of the present invention. As shown in the cross-sectional view of FIG. 4, the bone conduction transmitter 1 is attached to a base member B16, and is provided outside the outer periphery of the ear pad 7. The base member B16 is made of a flexible material such as vinyl chloride, and a part of the base member B16 is provided with a bent portion 17 so as to be easily bent in a direction perpendicular to the face side. One end of the base member B16 is fixed by being sandwiched between a part of the ear pad 7, the cover member 4 and the base member A3. FIG. 5 shows a perspective view of the helmet 11 attached to the connection belt 12. The base member B16 is deformed by tying the chin strap 13, and the bone conduction transmitter 1 is attached to the side of the face in close contact. You.

[0008]

[Effect of the invention]

 According to the present invention, the bone conduction transmitter is not inserted into the ear canal, which has a large individual difference, but is closely attached to the side of the face via a flexible material or a base material having a bent portion that can secure a sufficient compression size. It is possible to send a stable transmission signal with less noise. Furthermore, since the bone conduction transmitter uses a flexible material or a base material with a bent portion, the cover member and the base member do not receive a large load, so the detection sensitivity is high even in the high-frequency range, and there is little clearness. It is possible to take out an appropriate transmission signal. Also, external noise is less likely to enter due to the ear pads, and the received voice can be heard clearly. Furthermore, since the helmet can be directly attached to the connection belt, there is no need to prepare a special helmet, and it is easy to use, and a high-performance bone conduction transmission / reception device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is a perspective view of the bone conduction transmitter / receiver of the present invention fixed to a connection belt of a helmet.

FIG. 3 is a view of wearing on the side of the face.

FIG. 4 shows another embodiment of the present invention.

FIG. 5 is a perspective view of the bone conduction transmitter / receiver according to another embodiment of the present invention fixed to a connection belt of a helmet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bone conduction transmitter 2 Receiver 3 Base member A 4 Cover member 5 Locking member 6 Groove 7 Ear pad 8 Flexible material 9 Guide 10 Cable 11 Helmet 12 Connection belt 13 Jaw cord 14 Fixed screw 15 Face side 16 Base member B 17 Bent part 18 Earlobe 19 Ear ring

Claims (2)

[Utility model registration claims] 1. A bone conduction transmitter / receiver provided with a donut-shaped ear pad surrounding an outer ear, a bone conduction transmitter / receiver, and a receiver, wherein the bone conduction transmitter / receiver is mounted on a connection belt connecting a helmet and a chin strap. A bone conduction transmission / reception device for a helmet, comprising: a locking portion that can be variably fixed; and a flexible material between a bone conduction transmitter and a base member to which the bone conduction transmitter is attached. 2. The bone conduction transmitter / receiver for a helmet according to claim 1, wherein the bone conduction transmitter is fixed to a base member having a bent portion.