JPH10290491A - Microphone for portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate changeover of directivity/omnidirectivity with a simple configuration, to attain hand-free speech at a quiet place, to attain a clearer speech at a noisy place, and to attain a speech in a low voice at a public place or the like so as not to disturb surrounding persons. SOLUTION: A condenser microphone main body 2 provided with a couple of sound wave input ports 21, 22 opposite to each other is contained in a microphone casing 1 provided in the midway of a connection wire L of an earphone E connecting to a portable telephone main body A, and external communication holes 11, 12 corresponding to a couple of the sound wave input ports 21, 22 are provided to the casing 1, an open/close switch S to switch the one external communication hole 12 is provided and directivity/omnidirectivity is changed selectively by the switching of the switch S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone for a portable telephone.

[0002]

2. Description of the Related Art Conventionally, mobile phones have become widespread,
Since it is frequently used while driving a car, traffic accidents due to carelessness in front of the telephone operation have been causing a social problem.

Therefore, a microphone for a mobile phone has been developed in which an omnidirectional microphone is provided in the middle of the connection line of the earphone connected to the mobile phone, and if the earphone is worn, a call can be automatically made when a call is made. State
While driving, you can now talk hands-free without releasing your hands from the steering wheel.

[0004]

However, since the above-mentioned conventional microphone for a portable telephone is omnidirectional, there is no problem in a quiet place or in a closed space such as an automobile. In a crowd, there is a problem that the voice of the caller and the surrounding noise are combined, making it difficult for the other party to hear even if the mouth is brought close to the microphone, and inevitably emits a loud voice I often bothered others.

[0005] It is an object of the present invention to provide a microphone for a portable telephone which can solve the above-mentioned problems.

[0006]

Therefore, in order to solve the above-mentioned problems, according to the present invention, a condenser type microphone body having a pair of sound wave inlets provided in a facing state is replaced with a portable telephone body. The microphone housing is housed in a microphone casing provided in the middle of the connection line of the earphone connected to the earphone, and the microphone casing is provided with external communication holes respectively corresponding to the pair of sound wave inlets, and one of the external communication holes is opened and closed. A switch is provided, and directivity and non-directionality can be selectively changed by switching operation of the open / close switch. Therefore, it is possible to clearly convey this voice to the other party by using the telephone hands-free while driving a car, or by switching to directivity in a noisy crowd.

According to the present invention, the open / close switch is configured to be push-operable, and when not operated, one of the external communication holes is in a closed state, and only the other sound wave inlet is connected to the outside. It functions as an omnidirectional microphone by communicating with the directional microphone. During operation, each external communication hole is opened, and both sound wave inlets communicate with the outside to switch to the directional microphone.

Further, in the present invention, the pair of sound wave inlets and the external communication holes are provided in a vertically opposed state when mounted, and the external communication holes located below can be opened and closed freely.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a condenser type microphone body having a pair of sound wave inlets provided in a facing state is housed in a microphone casing provided halfway through a connection line of an earphone connected to a portable telephone body. At the same time, the microphone casing is provided with external communication holes respectively corresponding to the pair of sound wave inlets, and an open / close switch for opening / closing one of the external communication holes is provided. Gender is selectively variable.

That is, a microphone casing is arranged so as to be positioned at the mouth with the earphone attached,
In normal conditions, it functions as an omni-directional microphone, enabling hands-free communication in quiet places and in cars, etc. The communication hole is closed to function as a directional microphone, so that even small voices can be clearly communicated.

The open / close switch can be configured to be push-operable. When the switch is not operated, one of the external communication holes is in a closed state, and only the other sound wave inlet communicates with the outside, and the omnidirectional microphone is connected. Function, and during operation,
Each external communication hole is opened, and both sound wave inlets can communicate with the outside and switch to a directional microphone.
With such a configuration, a simple configuration and good usability can be achieved.

Preferably, the pair of sound wave inlets and the external communication holes are provided in a vertically opposed state in a mounted state, and the external communication holes located below can be freely opened and closed.

With this configuration, the microphone can be provided below the chin at a position where the microphone can be suspended from the air, so that the microphone is not hindered, and the microphone is wrapped by hand with the switch of the microphone pressed. It is easy to take a call, and it is possible to make a voice call in the noise.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a state in which a mobile phone microphone M according to the present embodiment is mounted on a mobile phone main body A, FIG. 2 is a sectional view of the mobile phone microphone M, and FIG.
It is sectional drawing in the I line. E is an earphone, L is a connection line connecting the mobile phone main body A and the earphone E, and P is a connection plug provided at one end of the connection line L.

As shown in FIG. 2, a microphone M for a portable telephone is provided in a microphone-like synthetic resin microphone casing (hereinafter referred to as a casing) 1 formed in a rugby ball shape.
It has a pair of sound wave inlets 21 and 22 formed in an opposed state, and houses a condenser type microphone body (hereinafter referred to as a microphone body) 2 that receives the same dB sound from both sound wave inlets 21 and 22. It is connected to the plug P via a connection line ML, and is disposed at a position separated from the earphone E by a predetermined distance. That is, in the present embodiment, as shown in FIG. 1, when the earphone E is worn, the mouth is a mouth of a general adult, and is positioned at least below the mouth. It is preferable that the casing 1 be positioned below so that the casing 1 does not come into contact with the face or the like in the mounted state.

The gist of the present invention is that the casing 1 has external communication holes corresponding to the pair of sound wave inlets 21 and 22, respectively.
11 and 12, and an open / close switch S for opening / closing one of the external communication holes is provided, and the directivity and the non-directivity can be selectively changed by the switching operation of the open / close switch S.

That is, as shown in FIG. 2, a casing 1 according to the present embodiment is formed by joining vertical half bodies 1a, 1a. A microphone accommodating space Q is provided which is partitioned into an upper space Q1 and a lower space Q2 when accommodating, and an upper external communication hole 11 communicating with the upper space Q1, and a lower external communication communicating with the lower space Q2. A hole 12 is formed. Reference numeral 10 denotes a joint of the casing 1.

The open / close switch S is connected to the lower space Q2.
In this embodiment, a partition wall 3 having a plurality of communication slits 30 is disposed immediately below the microphone body 2 and an operation plate 4 is attached so as to be in sliding contact with the partition wall 3.

The operation plate 4 includes a main body 41 having an opening / closing slit 40 corresponding to the communication slit 30;
And an elastic projection 43 provided on the opposite side of the operation projection 42, the operation projection 42 protruding from one end edge of the operation plate 4, and a normal posture of the operation plate 4. In the above, the opening / closing slit 40 and the communication slit 30 do not overlap, and when the operation projection 42 is pressed, the leg 43 functions as a spring and bends, so that the opening / closing slit 40 and the communication slit 30 overlap. Installed. In addition, the space between the partition wall 3 and the connection lines L and ML penetrating the partition wall 3 is securely sealed so that no sound wave leaks.

That is, normally, as shown in FIGS. 2 and 3, the communication slit 30 and the opening / closing slit 40 do not overlap each other, so that sound can be transmitted only through the upper external communication hole 11 to the sound inlet of the microphone body 2. The light is incident on 21 and has omnidirectionality.

On the other hand, the on / off switch S is operated, that is,
When the operation projection 42 is pressed, the opening / closing slit 40 and the communication slit 30 overlap, and not only the upper external communication hole 11 but also
Sound is lower external communication hole 12 → open / close slit 40 → communication slit
30 → sound wave inlet 22 can be made incident, and the sound of the same dB is canceled out from sound wave inlets 21 and 22 located above and below, and functions as a directional microphone from which only sound with higher sound pressure is output.

Therefore, when the plug P is connected to the mobile phone A and the earphone E is simply attached, the microphone M for the mobile phone becomes omni-directional and is hands-free in a quiet place or in a car. It is possible to make a call.

On the other hand, in a noisy place, for example, in a station yard or in a busy street, if the directivity is obtained by switching the open / close switch S, the other party can clearly hear even if speaking in a small voice. Therefore, it does not bother loudly and disturb others.

Since the microphone is provided below the chin at a position where it can be suspended in the air, and is configured to open and close the lower external communication hole 12, it is possible to operate the switch S in a natural posture. The casing 1 can be wrapped by hand while pressing the projections 42, and the operability when talking with a low voice is extremely good.

As described above, in this embodiment, a simple configuration,
The microphone main body 2 can be switched between omnidirectionality and directivity by a simple operation, so that the telephone can be used according to the place of use.

The shape of the casing 1 and the structure of the open / close switch S are not limited to those shown in this embodiment.

[0028]

The present invention is embodied in the above-described embodiment, and has the following effects.

According to the first aspect of the present invention, a condenser microphone body having a pair of sound wave inlets provided in a facing state is housed in a microphone casing provided halfway through a connection line of an earphone connected to a mobile phone body. In addition, the microphone casing is provided with external communication holes respectively corresponding to the pair of sound wave inlets, and an open / close switch for opening / closing one of the external communication holes is provided. The directivity can be selectively changed, so that you can use the phone hands-free while driving a car, etc., and switch to the directivity in noisy crowds, etc. It is possible to communicate to the louder and does not bother the surroundings.

According to the second aspect of the present invention, the open / close switch is configured to be push-operable, and when not operated, one external communication hole is closed, and only the other sound wave inlet communicates with the outside. In operation, each external communication hole is opened and both sound wave inlets communicate with the outside and switch to the directional microphone during operation, so in addition to the above effects, in addition to the above effects, low-cost simple The configuration can be made, and the operability becomes extremely good.

According to the third aspect of the present invention, the pair of sound wave inlets and the external communication holes are provided in a vertically opposed state in a mounted state, and the external communication holes located below can be opened and closed by switching. In addition to the effects of, the microphone casing can be wrapped by hand while operating the changeover switch in a natural posture, so that a voice call with a smaller voice is possible in a natural posture.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chip-type resistor as an electronic component including a film-shaped resistor according to the present embodiment.

FIG. 2 is an explanatory view showing a first half of a manufacturing process of the chip resistor.

FIG. 3 is an explanatory view showing a latter half of a manufacturing process of the chip-type resistor.

[Explanation of symbols]

 A mobile phone body E earphone L connection line M microphone for mobile phone S open / close switch 1 microphone casing 2 microphone body 11 sound wave inlet 12 sound wave inlet 21 external communication hole 22 external communication hole

Claims (3)

[Claims] 1. A pair of sound wave inlets (21) provided in an opposed state,
(22) Condenser type microphone body with (2)
Connect the earphone (E) to the mobile phone (A)
(L) While being housed in the microphone casing (1) provided in the middle, the microphone casing (1) has external communication holes (11) and (11) corresponding to the pair of sound wave inlets (21) and (22), respectively. 12) and an open / close switch (S) for opening / closing one of the external communication holes (12).
A microphone for a mobile phone, wherein the directivity and the non-directionality are selectively changed by the switching operation of (S). 2. The open / close switch (S) is configured to be push-operable, and when not operated, one external communication hole (12) is closed, and only the other sound wave inlet (21) is externally connected. Functions as an omnidirectional microphone, and during operation, the external communication holes (11) and (12) are opened, and both sound wave inlets (21) and (22) communicate with the outside and are switched to directional microphones The microphone for a mobile phone according to claim 1, wherein: 3. The pair of sound wave inlets (21), (22) and the external communication holes (11), (12) are provided in a vertically opposed state in a mounted state, and the external communication holes (12) located below. 3. The microphone for a mobile phone according to claim 1, wherein the microphone is switchable between open and closed.