JPS599495Y2 - microphone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microphone, and more particularly to a microphone that is waterproof and unidirectional.

Generally, a microphone such as a transceiver is configured to have unidirectionality depending on its intended use.

That is, this type of microphone must be designed so that its sensitivity is particularly high in one particular direction so that it can collect only the target sound without picking up surrounding sounds.

Conventionally, in this type of microphone, in order to provide unidirectionality, first and second cylindrical parts are integrally provided, which communicate the horn-like horns cut out of rubber with each other, and the outer peripheral surface and the inner peripheral surface a packing in which a flange portion and a first step portion are integrally provided, and one end portion is integrally provided with a flange portion and a first step portion;
a microphone unit that is fitted into a cylindrical portion and abuts the first step; and an opening and a second step, into which the microphone unit and the packing are inserted. a cabinet in which a flange portion elastically contacts an inner circumferential surface and the other end portion of the microphone unit contacts the second step portion; The present invention relates to a microphone including a lid body each having a small through hole provided at a position facing the first cylindrical portion.

By arranging the structure in this manner, the number of parts and the number of assembly steps can be reduced, and the cost of the product can be reduced.

An example in which the present invention is applied to a microphone of a transceiver will be described above.

As shown in FIG. 1, a cylindrical microphone unit 4 for converting sound into an electrical signal and a packing 5 made of rubber, for example, are housed in a cabinet 2 of a microphone 1.

A first cylindrical portion 7 is integrally provided approximately at the center of the upper surface of the packing 5, and the upper end of this cylindrical portion 7 is shaped like a trumpet to improve sound collection efficiency.

Further, as shown in FIGS. 1 and 2, a second cylindrical portion 8 is integrally provided approximately at the center of the lower surface of the packing 5.
As shown in FIG. 3, the upper end of the microphone unit 4 on the side where the diaphragm 10 is provided is fitted into the cylindrical portion 8.

Therefore, this microphone unit 4 is supported by the packing 5 by the elastic restoring force of the cylindrical portion 8.

Above the diaphragm 10 of the microphone unit 4, there is a sound propagation path from the truncated conical recess 12 provided in the packing 5 and the hollow part 7a of the cylindrical part 7 communicating with the recess 12. is in great shape.

The main body of the packing 5 is shaped like a flat rectangular parallelepiped, and its four side surfaces are formed into inclined surfaces 5a.

When storing the microphone unit 4 and the packing 5 in the cabinet, the packing 5 is
The microphone unit 4 is fitted into the cylindrical part 8 , and the first stepped part 9 formed at the boundary between the cylindrical part 8 and the recess 12 is inserted.
The packing 5 and the microphone unit 4 are inserted into the cabinet 2 through the opening 16 of the cabinet 2, with the upper end of the microphone unit 4 in contact with the upper end of the microphone unit 4.

In this case, the inclined surface 5a of the packing 5 comes into contact with the inner surface of each side wall 2a of the cabinet 2, and as shown in FIG.
deforms elastically.

Therefore, when the packing 5 is inserted into the cabinet 2 to a predetermined position, the elastic restoring force of the edge portion 5b causes the edge portion 5b and each side wall of the cabinet 2 to
a are brought into close contact with each other, whereby the packing 5 and the microphone unit 4 are each supported within the cabinet 2.

Note that since only the edge portion 5b, not the entire surface of the inclined surface 5a, comes into contact with the inner surface of the side wall 2a, the friction between the two is not so large, and the above-mentioned insertion operation can be performed easily.

Further, the outer periphery of the lower end of the microphone unit 4 supported by the cabinets 1 and 2 via the packing 5 is formed by ribs 11 formed on the inner surface of each side wall 2a of the cabinet 2, as shown in FIG. It is configured to come into contact with the second step portion 13, thereby correctly regulating its position within the cabinet 2.

In this state, the lid 14 is detachably attached to the upper end of the cabinet 2 so as to close the opening 16.

The top surface of this lid body 14 has a through hole 1 approximately in the center thereof.
5 is provided, and this through hole 15 is configured to communicate with the hollow portion 7a of the cylindrical portion 7.

Further, coated conductive wires 17 are connected to the lower surface of the microphone unit 4, and the microphone unit 4 is electrically connected to a transceiver main body (not shown) by these coated conductive wires 17.

According to the microphone 1 constructed in this manner, the packing 5 and the microphone unit 4 are stored in the cabinet 2 with the edge portion 5b of the packing 5 elastically deformed and in close contact with the inner surface of each side wall 2a of the cabinet 2. will be done.

Further, the cylindrical portion 8 of the packing 5 and the upper outer peripheral surface of the microphone unit 4 are in close contact with each other.

Therefore, this microphone unit 4 is completely sealed within the cabinet 2, and it is possible to reliably prevent liquid such as water from entering the connection between the microphone unit 4 and the covered conductor 17 from outside the cabinet 2.

Furthermore, since the opening 16 is closed by the lid 14, this also prevents liquid such as water from entering the cabinet 2 to some extent.

Note that liquid such as water may enter onto the diaphragm 10 from outside the cabinet through the through hole 15 of the lid 14, the hollow part 7a of the cylindrical body 7, and the recess 12, respectively.
In such a case, if you turn microphone 1 upside down,
The liquid that has entered can be easily removed from the microphone 1.

Further, the cylindrical portion 7 of the packing 5 allows only sounds from a predetermined direction (direction of arrow A in FIG. 3) to be picked up without picking up surrounding sounds.

This allows the microphone 1 to have unidirectionality.

Further, since the waterproof packing 5, which also serves as a holder for the microphone unit 4, is integrally provided with the cylindrical portion 7 for imparting unidirectionality, the number of parts and the number of assembly steps can be reduced.

Furthermore, since the microphone unit 4 is supported by the cylindrical portion 8 and step portion 9 of the packing 5 and the step portion 13 of the cabinet 2, the assembly work of the microphone 1 is facilitated.

Therefore, it is possible to reduce the cost of the product.

Although the present invention has been described above based on one embodiment, the present invention is not limited to this embodiment, and can be further modified based on the technical idea of the present invention.

For example, the present invention is applicable not only to transceiver microphones but also to various types of unidirectional microphones.

Since the present invention has the above-described structure, the microphone can be made waterproof and unidirectional with a single packing, and the microphone unit can be reliably supported only with this packing and the cabinet. Therefore, the number of parts and the number of assembly steps can be reduced, and the assembly work of the microphone becomes easier.

Furthermore, since only the flange portion of the packing comes into contact with the cabinet, it is easy to insert the packing into the cabinet, which also facilitates the assembly of the microphone.

Therefore, it is possible to significantly reduce the cost of the product.

In addition, since the cabinet is closed by the lid,
The waterproofness of the microphone is more reliable.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to a microphone for a transceiver. Fig. 1 is an exploded perspective view of the main parts of the microphone according to this embodiment, and Fig. 2 is a perspective view of the packing from below. 3 are longitudinal cross-sectional views of the main parts of the microphone. In addition, in the symbols used in the drawings, 1...
・Microphone, 2...Cabinet, 4...
...Microphone unit, 5...Packing, 5b...Edge part, 7...1st
Cylindrical part, 8...Second commercial part, 9...
・First step, 13...Second step, 14...
...Lid body, 15...Through hole, 16...
...It is an opening.

Claims (1)

[Scope of utility model registration request] A packing having first and second cylindrical parts communicating with each other integrally provided therein, and a flange part and a first step part integrally provided on the outer circumferential surface and the inner circumferential surface, respectively; a microphone unit fitted into the second cylindrical part and in contact with the first step; the microphone unit and the packing having an opening and a second step; the microphone unit and the packing being inserted through the opening; a cabinet in which the seven flange portions are in elastic contact with the inner circumferential surface and the other end of the microphone unit is in contact with the second step portion; and a lid body provided with a through hole that is sufficiently smaller than the diameter thereof at a position facing the first cylindrical part.