JPH0799536A - Mounting structure for microphone of portable telephone set - Google Patents

Abstract

PURPOSE:To form the mounting structure for a microphone of the portable telephone set suppressing surrounding noise. CONSTITUTION:A differential microphone 12 having a 1st and a 2nd microphone element is adopted for the portable telephone set and a front sound collection hole 8 including the 1st microphone element is provided to a front part of the portable telephone set. A rear sound collection hole 9 is provided to a position of a space of a removable charging battery 10 just opposite to the front sound collection hole and connects to the 2nd microphone element of the differential microphone via a duct. The phase of the surrounding noise from the front sound collection hole is opposite to the phase of the surrounding noise from the rear sound collection hole and the surrounding noise of both the holes is cancelled together. Or a structure of direct provision of the rear sound collection hole to a power generating member 13 or a configuration of the rear sound collection through-hole into which the differential microphone is inserted may be adopted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone mounting structure for a portable telephone device, and more particularly to a differential microphone mounting structure for a portable telephone device having a rechargeable battery.

[0002]

2. Description of the Related Art Since mobile phone devices are often used outdoors, there is a possibility that the influence on voice may cause a very serious problem when used in a place where ambient noise is large.

As an example of suppressing ambient noise, there is a differential microphone. This differential microphone is the first
And a second microphone element, the first microphone element is arranged at a position where voice and ambient noise can be input, and the second microphone element is arranged at a position where ambient noise can be input. Then, the ambient noise is suppressed by using the sound pressure difference between the voice and ambient noise input to the first microphone element and the ambient noise input to the second microphone element.

Further, mobile phones provided with a rechargeable battery have been diversified in recent years, and most of them are detachably mounted on the back surface of the mobile phone device.

[0005]

Conventionally, in this type of portable telephone device, no solution to the above-mentioned ambient noise has been taken, and the user of the portable telephone device is forced to deteriorate voice due to ambient noise. It was

An object of the present invention is to provide a novel microphone for applying a differential microphone to a mobile phone having a rechargeable battery in order to solve the above-mentioned problem, that is, the problem of voice deterioration due to ambient noise. It is to provide a mounting structure.

[0007]

In order to achieve the above-mentioned object, a microphone mounting structure of a mobile phone device of the present invention has a receiver section, an operation button section and a transmitter section on a front surface and a rear surface on a rear surface. It has a detachable rechargeable battery, the transmitter is formed as a front sound collection hole, and the first microphone element of the differential type microphone for inputting speech voice and front ambient noise is used as the front sound collection. The back sound collecting hole, which is arranged in the hole and collects the side sound and the back sound, is formed in the space part of the member of the rechargeable battery located at the position opposite to the position of the front sound collecting hole. The second microphone element of the differential type microphone and the back sound collecting section are connected by a straight path.

Further, the microphone mounting structure of the portable telephone device of the present invention has a through hole which is a back sound collecting hole in a space located below the power generation member of the rechargeable battery, and the differential microphone Is inserted.

Further, the microphone mounting structure of the portable telephone device of the present invention has a back sound collecting hole in a space located below the power generating member of the rechargeable battery, and the back sound collecting hole and the back sound collecting hole are provided. The parts are connected by a deformed passage that is not directly connected by a straight line.

Further, in the microphone mounting structure of the portable telephone device of the present invention, the back sound collecting hole is directly formed on the power generation member of the rechargeable battery, and the periphery of the power generation member is covered with the resin member for protection.

[0011]

Operation: Call voice and front ambient noise input to the first microphone element through the front sound collecting hole and side and back portions input to the second microphone element through the back sound collecting hole. And the ambient noise of the front sound collection hole and the back sound collection hole are opposite in position, and therefore have a relationship of opposite phases, and the noises are canceled and suppressed.

Further, a structure in which a differential microphone is inserted into the through hole, a configuration of a deformed passage which is not directly connected by a straight line for connecting the back sound collecting hole and the back sound collecting portion, and the back sound collecting hole is rechargeable By using a structure that is configured directly on the power generation member of the battery, the differential microphone can be attached to the posted telephone device regardless of the shape of the differential microphone, and the back sound collection hole can be positioned freely on the rechargeable battery. Can be placed at.

[0013]

The present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram for explaining a noise suppression circuit in the differential microphone of the present invention.

In the figure, the differential microphone 12 is
Composed of two microphone elements 1 and 16,
The first microphone element 1 includes a differential microphone 12
Is an element for inputting voice including ambient noise input from the front sound collecting hole (not shown). On the other hand, the second microphone element 16 is a back sound collecting portion of the differential microphone 12 connected to a back sound collecting hole (not shown) through a passage, and ambient noise from the back and side surfaces is input. The subtraction circuit 3 subtracts the input signals from the microphone elements 1 and 2 and outputs an audio signal in which ambient noise is suppressed. The equalizer 4 inputs the audio signal from the subtraction circuit 3, flattens the audio signal within the audio band, and outputs it.

FIG. 2 is a perspective view showing a first embodiment of a microphone mounting structure for a mobile phone according to the present invention.

In the figure, on the front surface of the main body 5 of the portable telephone device, a numeric keypad and a function selection key group 7 and a receiver 11 are provided.
And a whip antenna 6 are provided on the upper part of the. In addition, a front sound collecting hole 8 is provided in the lower part of the front sound collecting hole 8 so that a voice and noise input through the front sound collecting hole 8 are transmitted to the front sound collecting hole 8. It is output to the first microphone element 1 of the differential microphone 12 (not shown) provided. Further, a detachable rechargeable battery 10 is mounted on the back surface of the mobile phone device.

FIG. 3 is a sectional view taken along the line AA of FIG.

In the figure, the rechargeable battery 10 comprises a power generation member 13 of NiCd composition covered with a resin member 17 and a space portion having no power generation member, that is, a space below the rechargeable battery 10 in the drawing. Has been formed. Also,
The back sound collecting hole 9 is provided in a part of the space portion. The differential microphone 12 includes a front sound collecting hole 8 and a back sound collecting portion 16, and the back sound collecting portion 16 is directly connected to the back sound collecting hole 9 via a passage. Furthermore, the rechargeable battery 10
The rubber packing 15 is inserted between the main body 5 of the mobile phone device and the surroundings, and ambient noise input from the back sound collecting hole 9 leaks from the gap between the main body 5 and the rechargeable battery 10. Is being prevented. Further, the diameter of the back sound collecting hole 9 is determined by the frequency bandwidth of the ambient noise to be suppressed. In this embodiment, since the back sound collecting hole 9 is provided right behind the front sound collecting hole 8, the layout design is very easy.

Next, the operation of the microphone of the first embodiment shown in FIGS. 2 and 3 will be described. The rechargeable battery 10 is removed when charging, and is attached to the main body 1 when charging is completed. This rechargeable battery 1
When 0 is attached and a call is being performed, first, a voice signal and noise are input from the front sound collecting hole 8 which is a transmitter, and at the same time, ambient noise on the back and side surfaces is generated by the back sound collecting hole. 9
Is input from the back sound collecting unit 16 via. At this time,
Since the back sound collecting hole 16 is provided at a position opposite to the position of the front sound collecting hole 8, the input ambient noise has a relation of opposite phase. Therefore, the ambient noise is completely canceled by the circuit configuration of the differential microphone 12 shown in FIG.

FIG. 4 is a sectional view showing a second embodiment of the microphone mounting structure of the portable telephone device of the present invention.

In the figure, a differential microphone 12 having a depth dimension longer than that shown in FIG. 3 is used. A through hole 14 is formed below the power generation member 13 of the rechargeable battery 10, that is, in a space portion. This through hole 14 collects ambient noise from the back and side surfaces, as in the back sound collecting hole 9 shown in FIG. A rubber packing 15 is inserted in the gap between the main body 5 of the mobile phone device and the rechargeable battery 10, and the through hole 14
Ambient noise input from the device is prevented from leaking through this gap. In this type of structure, the differential microphone 12 is inserted into the through hole 14, and the front sound collecting hole 8 that is a transmitter is provided on the front surface of the mobile phone device body 5. Since the through-hole 14 is located exactly opposite to the front sound collecting hole 8, the ambient noise input from the front sound collecting hole 8 and
Since it has an opposite phase to the ambient noise input from the back sound collector 16 via the through hole 14, the ambient noise can be suppressed as in the first embodiment.

FIG. 5 is a sectional view showing a third embodiment of the microphone mounting structure of the portable telephone device of the present invention.

In the figure, the back sound collecting hole 9 and the back sound collecting portion 1 are shown.
The passage connecting 6 and 6 is not a straight line but a deformed passage. This passage is formed in a substantially L shape extending downward. In this embodiment, the power generation member 13 is applied to the case where the power generation member 13 exists at the position opposite to the front sound collecting hole 8. At this time, if the back circumferential sound collecting hole 9 is provided at a position exactly opposite to the front sound collecting hole 8, that is, in the power generating member 13, the power generating member 13 is exposed from the inner wall surface of the back sound collecting hole 9, so that the back portion is exposed. This is done in order to solve the problem that the sound collecting hole 9 cannot be provided at a position opposite to the front sound collecting hole 8. As an example of this application, in addition to the configuration shown in the figure, a back sound collecting hole 9 is formed in the space portion such as the left and right and the upper part of the rechargeable battery 10 avoiding the power generating member 13, A deformed passage that is not a straight line can be formed so as to connect with the sound part 16. In this configuration, the rear sound collecting holes 9 cannot be provided at positions directly opposite to the front sound collecting holes 8 and the ambient noise input from each of them does not have an antiphase relationship. Since the back sound collecting hole 9 can be provided at a position further away from the sound hole 8, the effect of noise suppression is rather improved.

FIG. 6 is a sectional view showing a fourth embodiment of the microphone mounting structure of the portable telephone device of the present invention.

In the figure, the basic structure is the first shown in FIG.
Is similar to the embodiment of FIG.
They are different in that they are formed directly inside. In this embodiment, since there is no space in the rechargeable battery 10, the back sound collecting hole 9 is directly formed in the power generation member 13. In this type of configuration, the power generation member 13 is protected by covering the inner wall surface of the back sound collecting hole 9 formed in the power generation member 13 with the resin member 17 so that the power generation member 13 is not exposed. In this embodiment, it is possible to dispose a large-scale power generation member 13 in which no space is present in the rechargeable battery 10, so that not only the battery capacity can be increased, but also the back sound collecting hole 9 The degree of freedom of arrangement can also be improved.

FIG. 7 is a perspective view of a rechargeable battery showing a fourth embodiment of the microphone mounting structure of the portable telephone device of the present invention.

In the figure, a circular back sound collecting hole 9 is directly provided in a power generating member 13 provided inside a rechargeable battery 10.

FIG. 8 is a sectional view showing a fifth embodiment of the microphone mounting structure of the portable telephone device of the present invention.

In the figure, the basic structure is the second one shown in FIG.
Is similar to the embodiment of FIG.
They are different in that they are formed directly inside. Also in this embodiment, similarly to the fourth embodiment shown in FIG. 6, the power generation member 1 is provided on the inner wall surface of the back sound collecting hole 9 formed in the power generation member 13.
The power generation member 13 is protected by covering it with a resin member 17 so that 3 is not exposed.

[0031]

As described above, the microphone mounting structure of the portable telephone device of the present invention employs the differential microphone, and the position of the front sound collecting hole of the differential microphone, which is the transmitter, is used. Since the back sound collecting hole can be provided at the position opposite to, ambient noise can be effectively suppressed. Furthermore, since the passage connecting the back sound collecting hole and the back sound collecting portion is formed by a deformed passage instead of a straight line, and since the back sound collecting hole is directly formed in the power generation member of the rechargeable battery, It is possible to arrange the back sound collecting hole at a free position of the rechargeable battery.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a noise suppression circuit in a differential microphone of the present invention.

FIG. 2 is a perspective view showing a first embodiment of a microphone mounting structure of the mobile phone device of the present invention.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing a second embodiment of the microphone mounting structure of the mobile phone device of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the microphone mounting structure of the mobile phone device of the present invention.

FIG. 6 is a sectional view showing a fourth embodiment of the microphone mounting structure of the mobile phone device of the present invention.

FIG. 7 is a perspective view of a rechargeable battery showing a fourth embodiment of the microphone mounting structure of the mobile phone device of the present invention.

FIG. 8 is a sectional view showing a fifth embodiment of the microphone mounting structure of the mobile phone device of the present invention.

[Explanation of symbols]

 1 ... First microphone element 3 ... Subtraction circuit 4 ... Equalizer 5 ... Mobile phone device body 6 ... Whip antenna 7 ... Numeric keypad and function selection key group 8 ... Front part Sound collection hole 9 ・ ・ ・ Back sound collection hole 10 ・ ・ ・ Rechargeable battery 11 ・ ・ ・ Earpiece 12 ・ ・ ・ Differential type microphone 13 ・ ・ ・ Power generation member 14 ・ ・ ・ Through hole 15 ・ ・ ・ Rubber packing 16 ... Second microphone element 17 ... Resin member

Claims (13)

[Claims] 1. An earpiece of a mobile phone unit, an operation button unit including a ten-key pad and an operation key, a detachable rechargeable battery mounted on a rear surface of a main body of the mobile phone unit, and first and second units. Differential microphone including a microphone element, a front sound collecting hole that constitutes a transmitter including the first microphone element of the differential microphone, and the front sound collecting hole provided in the rechargeable battery. , A back sound collecting hole provided in a space portion of the rechargeable battery located opposite to the position where the sound collecting portion is arranged, a back sound collecting portion which is the second microphone element of the differential microphone, and the back sound collecting hole. A structure for mounting a microphone of a mobile phone device, comprising: a passage for connecting to a rechargeable battery and a rubber packing inserted into a gap between the main body of the mobile phone device. 2. The attachment of a microphone of a mobile phone device according to claim 1, wherein the differential microphone is inserted into a through hole which is the back sound collecting hole provided in the rechargeable battery. Construction. 3. The mobile phone device includes: the first and second microphone elements that constitute the differential microphone; and a subtraction circuit that receives output signals of the first and second microphone elements as inputs. The microphone mounting structure according to claim 1, further comprising an ambient noise suppressing circuit including an equalizer having an output of the subtracting circuit as an input. 4. An earpiece of a mobile phone device, an operation button part including a ten-key pad and an operation key, a detachable rechargeable battery mounted on the back surface of the main body of the mobile phone device, and a differential microphone. A front sound collecting hole of a differential microphone that is a transmitter, a back sound collecting hole provided in a space part of the rechargeable battery, a back sound collecting portion and the back sound collecting hole of the differential microphone. A structure for mounting a microphone of a mobile phone device, comprising: a deformed passage that is not directly connected by a straight line that connects with a rechargeable battery and a rubber packing that is inserted into a gap between the main body of the mobile phone device. 5. An earpiece of a mobile phone device, an operation button part including a ten-key pad and an operation key, a detachable rechargeable battery mounted on the back surface of the main body of the mobile phone device, and a differential microphone. A front sound collecting hole of a differential microphone that is a transmitter and a back sound collecting hole provided at a position opposite to a position of the power generating member of the rechargeable battery where the front sound collecting hole is disposed. A resin member covering the inner wall surface of the back sound collecting hole, a passage connecting the back sound collecting portion of the differential microphone and the back sound collecting hole, the rechargeable battery and the main body of the mobile phone device. A microphone mounting structure for a mobile phone device, characterized in that it has a rubber packing that is inserted into a gap between 6. The microphone attachment of a mobile phone device according to claim 5, wherein the differential microphone is inserted into a through hole which is the back sound collecting hole provided in the rechargeable battery. Construction. 7. A portable electronic device main body, a detachable rechargeable battery mounted on the back surface of the portable electronic device main body, a differential microphone, and the portable electronic device main body in the differential microphone. Portable electronic device including a front sound collecting hole for inputting the sound of the front part and a back sound collecting hole provided in the space of the rechargeable battery for inputting the sound of the back to the differential microphone Microphone mounting structure. 8. The microphone of a portable electronic device according to claim 7, wherein the differential microphone is inserted into a through hole that is the back sound collecting hole provided in the rechargeable battery. Mounting structure. 9. The main body of the portable electronic device comprises: first and second microphone elements that constitute the differential microphone; and a subtraction circuit that receives output signals of the first and second microphone elements as inputs. The mounting structure for a microphone of a portable electronic device according to claim 7, further comprising: an ambient noise suppression circuit including an equalizer having an output of the subtraction circuit as an input. 10. The microphone of a portable electronic device according to claim 7, wherein a passage connecting the back sound collecting portion of the differential microphone and the back sound collecting hole is a straight path. Mounting structure. 11. The portable electronic device according to claim 7, wherein a passage connecting the back sound collecting portion of the differential microphone and the back sound collecting hole is a straight passage that is not directly connected and is a deformed passage. Microphone mounting structure. 12. A portable electronic device main body, a detachable rechargeable battery mounted on the back surface of the portable electronic device main body, a differential microphone, and the portable electronic device main body in the differential microphone. Portable electronic device including a front sound collecting hole for inputting the sound of the front part of the rechargeable battery and a back sound collecting hole provided in the power generation member of the rechargeable battery for inputting the sound of the back part to the differential microphone Microphone mounting structure. 13. The attachment of a microphone of a mobile phone device according to claim 12, wherein the differential microphone is inserted into a through hole which is the back sound collecting hole provided in the rechargeable battery. Construction.