JP2556282Y2 - Wind noise prevention microphone - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind noise preventing microphone suitable for use in a headset used for communication in motorcycles and car racing.

[0002]

2. Description of the Related Art Microphones of this type are required to have low wind noise. Conventionally, there is a structure in which a windscreen or the like is provided outside a microphone case or in front of a diaphragm in the case. In some cases, the relative sensitivity of the microphone is lowered by lowering the impedance, and a call is made in an extreme close-talking system.

[0003]

However, in the former conventional example described above, there is a problem that the effect is not sufficient when the wind speed (relative) increases. Also,
The latter had a problem that it was difficult to use because of the lack of absolute sensitivity.

This invention has been proposed in view of the above, and its purpose is to reduce the wind noise without reducing the sensitivity in particular, that is, the sensitivity is almost the same as that of a conventional general microphone, and An object of the present invention is to provide a wind noise prevention type microphone having a drip-proof effect against rain and the like.

[0005]

According to the present invention, a microphone unit 3 held by a microphone holder 2 made of an elastic member is housed in a cylindrical microphone case 1 having a bottom, and a front side of the microphone unit 3 is provided. A protector 4 having a sound hole 4a at a central portion, a foam 6 having a predetermined thickness, an equalizer 5 having a sound hole 5a at an eccentric position are provided, and a waterproof compressible material sheet 7 is provided at an upper portion thereof. The above object is achieved by attaching the microphone cap 10 to the case 1.

[0006]

According to the present invention, a sound hole 5a is formed at an eccentric position in the equalizer 5, a foam body 6 is provided below the sound hole 5a, a protector 4 having a sound hole 4a is provided in the center, and the microphone unit 3 is positioned below the protector 4. , Microphone unit 3
The wind noise that reaches is reduced by the foam 6 or the like. Further, a waterproof compressed material sheet 7 is provided on the front surface of the equalizer 5 to prevent water droplets from entering the microphone unit 3 side.

[0007]

1 is an exploded perspective view of one embodiment of the present invention, FIG.
FIG. 4 is a sectional view showing the assembled state. In these figures, reference numeral 1 denotes a cylindrical microphone case made of synthetic resin or metal and having a bottom, and a threaded portion 1a is formed on the outer periphery of the upper side. A microphone unit 2 is made of rubber or a soft resin, and is also a cylindrical microphone holder having a bottom. The microphone unit 3 is placed inside the microphone holder 2, and the microphone holder 2 is stored in the microphone case 1.

Reference numeral 4 denotes a disk-shaped protector provided on the upper surface of the microphone unit 3. A small-diameter sound hole 4a is formed in the center of the protector. Between them, an open-cell foam 6 having an appropriate thickness is sandwiched between them so as to have a volume therebetween. In this case, a small-diameter sound hole 5a is formed in the equalizer 5 at an eccentric position as far away from the center as possible.

Reference numeral 7 denotes a compressed material sheet which is waterproofed, transmits sound, and reduces the wind speed. The compressed material sheet 7 has a disc shape, and is formed by thermally compressing an open cell foam and impregnating with a water repellent. It is formed on the upper part of the equalizer 5. Reference numeral 8 denotes a ring-shaped rubber packing for sealing, 9 denotes a protective net, and 10 denotes a microphone cap having an opening 10a. Reference numeral 12 denotes a fixing screw for the microphone arm (flexible shaft) 11.

When assembling, the microphone unit 3 is built in the microphone holder 2, and the protector 4, the foam 6, and the equalizer 5 are mounted on the microphone unit 2 in an overlapping manner. This assembly is housed in the microphone case 1. In this case, the back surface of the microphone holder 2 has a certain capacity and has a closed structure. The electric wire 3a of the microphone unit 3 is drawn out from the hole at the bottom of the microphone holder 2 to the bottom of the microphone case 1 and a microphone arm (flexible shaft) 11 from the outside.
The microphone arm (flexible shaft) 11 is connected to a cylindrical connector portion 1 b protruding from a side of the microphone case 1. In addition, a rubber packing 8 is provided on the upper part of the microphone case 1.
The microphone 9 can be assembled by disposing the net 9 and screwing the microphone cap 10 into the screw portion 1a of the microphone case 1 as is well known. In addition,
The compressed material sheet 7 is attached to the microphone holder 2 via an adhesive at a portion in contact with the microphone holder 2.

When this microphone is used for a headset for a helmet of a motorcycle or a car, the noise due to a wind noise is small and is suitable. In other words, wind noise is generated by airflow during traveling. In this microphone, a foam 6 having a thickness set to have an optimum capacity according to a use state is provided between the protector 4 and the equalizer 5. The wind noise can be reduced without directly hitting the microphone due to the interaction between the protector 4 provided with the sound holes offset from each other, the equalizer 5 and the foam 6.

Further, in this microphone, since the compressed material sheet 7 which has been subjected to the waterproof treatment is provided at the front, it is possible to prevent water droplets from entering the inside even if it is rain. Further, since the microphone unit 3 is held by the microphone holder 2 made of rubber or soft resin, it is possible to reduce the impact such as overturning, and to take measures to prevent failure. In addition, when the microphone was mounted on a motorcycle helmet and a conversation was performed in a running state of about 140 km / h, the conversation was possible without being affected by wind noise.

[0013]

According to the present invention constructed as described above, since the equalizer 5 having the sound hole 5a at the eccentric position, the foam 6, etc. are built in, the wind noise is reduced and the waterproof compressed material sheet is provided. Since the microphones 7 are provided on the front surfaces of the microphones, a convenient microphone having drip-proof properties can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is an assembled sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microphone case 1a Screw part 1b Connector part 2 Microphone holder 3 Microphone unit 3a Electric wire 4 Protector 4a Sound hole 5 Equalizer 5a Sound hole 6 Foam 7 Compression material sheet 8 Rubber packing 9 Net 10 Microphone cap

Claims (1)

(57) [Scope of request for utility model registration] A cylindrical microphone case with a bottom (1).
A microphone unit (3) held by a microphone holder (2) made of an elastic member is housed therein, and a sound hole (4) is provided at the center of the front side of the microphone unit (3).
(a), a foam (6) having a predetermined thickness, an equalizer (5) having a sound hole (5a) at an eccentric position, and a waterproof compressed material sheet ( 7), wherein the microphone case (1) is provided.
A wind noise prevention type microphone characterized in that a microphone cap (10) is attached to the microphone.