JP4125737B2 - Telephone and its noise canceling method - Google Patents

Description

  The present invention relates to a telephone set, and more particularly to a telephone set that prevents a click sound generated when a key operation is performed during a call on a mobile phone from being transmitted to the other party, and a noise canceling method thereof.

  Telephones are widely used as communication means, that is, voice or data transmission / reception means. In particular, mobile phones are rapidly spreading due to the convenience of being able to communicate virtually anywhere at any time within the service area. In addition, since the usage environment of a mobile phone changes greatly compared to a fixed (or assumed or office) phone, various functions are added to improve the convenience for the user.

  For example, it is possible to adjust the volume of the speaker that is most easily heard by the key operation by the user according to the ambient noise. In addition, a phone book function is also provided in which necessary information, for example, a third party's telephone number is checked and notified to the other party by operating keys during a call with the other party.

  However, the mobile phone generally has a compact design in which a plurality of operation keys, a sound collecting microphone, and a speaker are integrally incorporated in a small body. Therefore, the click sound generated when a key operation such as changing the reception volume or checking the registered phone number during a call on the mobile phone is detected by the sound collecting microphone and heard as noise from the other party's reception. It was uncomfortable for the other party.

  Such annoying click sound can be eliminated or reduced by using a soft (or silent) operation key. However, when a soft operation key is adopted, there is no click feeling, so it is difficult for the user to confirm whether or not the operation key has actually been operated. It is.

  Therefore, a telephone, a sum cut circuit in the telephone, and a radiotelephone system that reduce the discomfort of the other party due to the occurrence of a click sound generated by the operation of a hook switch or a slide switch provided on the telephone are disclosed (for example, Patent Literature 1, Patent Document 2 and Patent Document 3).

JP-A-5-83340 (2nd page, FIG. 1) Japanese Patent Laid-Open No. 7-58811 (page 2-3, FIG. 1) JP-A-8-18631 (page 3, Fig. 1)

  However, in the prior art, it has been difficult or impossible to achieve both ensuring the click feeling of the operation key and eliminating discomfort with the other party. Further, in the prior art, a complicated operation for eliminating the discomfort given to the other party is necessary.

  The present invention has been made in view of the above-described problems of the prior art, and a main object of the present invention is to provide a telephone and a noise canceling method for solving or reducing such problems.

  In order to solve the above-described problem, the telephone and the noise canceling method according to the present invention employ the following characteristic configuration.

(1) In a telephone that collects user's voice through a microphone and transmits it to the other party and has operation keys that can be operated by the user during a call.
A first detector that detects that the first key has been pressed in the pressing direction of the operation key; and a microphone mute means for muting the microphone when detection is made by the first detector. A telephone including a second detector for detecting that there is an input corresponding to the pressed operation key when the operation key is pressed for a distance greater than the first distance.
(2) The first detector includes a contact pair disposed on a key board on which a key contact is provided, and includes a flexible board and a contact that short-circuits the contacts of the flexible board. 1) Telephone.
(3) The telephone set according to (2), wherein the contact for short-circuiting the contact pair of the flexible substrate is provided on a bottom surface of the operation key.
(4) The telephone set according to (1), (2), or (3), wherein the microphone is a mobile phone disposed in the vicinity of the operation key.
(5) In a noise elimination method for a telephone that collects a user's voice via a microphone and transmits the collected voice to the other party, and prevents the noise when the user operates the operation key during a call from being transmitted to the other party.
A first step of detecting that the first key has been pressed in the pressing direction of the operation key; a second step of muting the microphone when there is a detection by the first step; And a third step of detecting that there is an input corresponding to the pressed operation key when the operation key is pressed for a distance greater than the first distance.
(6) The telephone noise canceling method according to (5), wherein the mute of the microphone is terminated when the user stops pressing the operation key after the key input.

  According to the telephone and the noise canceling method of the present invention, the following remarkable effects in practical use can be obtained. That is, even if a key is operated during a call, the microphone is muted prior to the key input, so that the click sound of the key operation is not sent to the other party and uncomfortable. It is also possible to ensure both a feeling of clicking during key operation and suppression of noise caused by clicking.

  Hereinafter, the configuration and operation of a preferred embodiment of a telephone and its noise canceling method according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a functional block diagram showing the basic configuration of a preferred embodiment of a telephone according to the present invention. The telephone (or mobile phone) 10 includes a keypad 20, a control circuit 30, an audio processing circuit 40, a radio circuit 50, and a microphone 60.

  The keypad 20 includes a plurality of operation keys including a numeric keypad, and executes functions such as input of the telephone number of the other party that the user of the telephone 10 wishes to talk on, adjustment of the reception volume, and the like. The control circuit 30 detects which part of the keypad 20 is operated (or pressed) by the user, and controls each part based on the operation result. The audio processing circuit 40 processes the audio signal collected by the microphone 60. The audio processing circuit 40 includes a microphone mute circuit 41 and appropriately mutes (silenced) an audio signal collected by the microphone 60, as will be described later. The radio circuit 50 transmits and receives audio signals and the like to and from the other party telephone via an antenna (not shown).

  Next, FIG. 2 is an enlarged cross-sectional view showing a detailed configuration of the keypad 20 portion shown in FIG. The keypad 20 includes a key sheet 29 including an operation key 21 and rubber (rubber) 22, a flexible substrate (or flexible) 23, an insulating sheet 24, and a key substrate 25. The key sheet 29, the flexible substrate 23, the insulating sheet 24, and the key substrate 25 are arranged so as to overlap each other. A first contact 26 is provided on the lower surface of the rubber 22, a pair of second contacts 27 are provided on the flexible substrate 23 and spaced apart from each other at a predetermined interval, and a third contact is provided on the key substrate 25. (Key contact) 28 is provided.

  When a user presses a specific operation key 21 on the keypad 20 with a finger or the like, a short circuit (ON) between a pair of second contacts 27 provided adjacent to each other by a first contact 26 provided on the rubber 22. ) The switch closed (ON) state is notified to the control circuit 30 shown in FIG. 1, and when the specific operation key 21 is pressed, the corresponding operation is performed.

  Next, with reference to FIG. 1 and FIG. 2, the operation of the telephone 10 and its noise elimination method according to the present invention will be described in detail.

  First, the user of the telephone 10 presses the operation key 21 as necessary during a call. By this pressing, the contact 26 and the contact 27 are first brought into contact (ON). That is, between the contact pair 27 on the flexible substrate 23 is short-circuited by the contact 26 and the switch is turned on. Further, when the operation key 21 is continuously pressed, the key contact 28 on the key board 25 is contacted (turned on). It should be noted that when the contact 26 and the contact 27 contact each other, a signal is sent to the control circuit 30 to detect in advance that a key is input, and no click sound is generated at this stage.

  Next, the control circuit 30 sends a signal to turn on mute to the microphone mute circuit 41 in the audio processing circuit 40. As a result, the microphone 60 is muted (sound collection operation is disabled).

  Further, the key contact 28 on the key substrate 25 comes into contact with the key input. When the contact between the contacts 26 and 27 is released after the contact of the key contact 28 is released, the control circuit 30 detects that the key input is completed. Then, a signal for turning off mute is sent to the microphone mute circuit 41.

  Here, since the microphone mute circuit 41 is turned on for the time from when the operation key 21 is pressed to when the key input is completed (the time when the click sound is generated), the click sound is not collected or detected by the microphone 60. . Therefore, the click sound resulting from the operation or pressing of the operation key 21 is not transmitted to the other party with whom the user of the telephone 10 is talking, and there is no possibility of causing discomfort.

  The configuration and operation of the preferred embodiment of the telephone and its noise canceling method according to the present invention have been described above in detail. However, it should be noted that such examples are merely illustrative of the invention and do not limit the invention in any way. Those skilled in the art will readily understand that various modifications and changes can be made according to a specific application without departing from the spirit and spirit of the present invention.

  The present invention is equipped with this function in a desk-top landline phone equipped with a PHS (Personal Handy-phone System) for business use or a hands-free function, so that even if a key is pressed during a call, noise caused by a click sound is detected. It is suitable when it is desired not to transmit to the side.

1 is a block diagram showing the configuration of a preferred embodiment of a telephone according to the present invention. It is sectional drawing which shows the structure of the keypad in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Telephone 20 Keypad 21 Operation key 22 Rubber 23 Flexible board 24 Insulation sheet 25 Key board 26, 27 Contact 28 Key contact 30 Control circuit 40 Audio processing circuit 41 Microphone mute circuit 50 Wireless circuit 60 Microphone

Claims (6)

In a telephone having operation keys that can be operated by the user during a call while collecting the user's voice via a microphone and transmitting the collected voice to the other party.
A first detector that detects that the first key has been pressed in the pressing direction of the operation key; and a microphone mute means for muting the microphone when detection is made by the first detector. And a second detector for detecting that there is an input corresponding to the pressed operation key when the operation key is pressed for a distance greater than the first distance. Phone. The first detector includes a flexible substrate and a contact that short-circuits the contacts of the flexible substrate, wherein a contact pair disposed on a key substrate provided with a key contact is formed. The telephone set according to claim 1.   The telephone according to claim 2, wherein the contact for short-circuiting between the contact pairs of the flexible substrate is provided on a bottom surface of the operation key.   The telephone according to claim 1, 2, or 3, wherein the microphone is a mobile phone arranged in the vicinity of the operation key. In a noise elimination method for a telephone that collects a user's voice through a microphone and transmits the collected voice to the other party and prevents the noise when the user operates the operation key during a call from being transmitted to the other party.
A first step of detecting that the first key has been pressed in the pressing direction of the operation key; a second step of muting the microphone when there is a detection by the first step; And a third step of detecting that there is an input corresponding to the pressed operation key when the operation key is pressed for a distance greater than the first distance. Noise elimination method.   The method of claim 5, wherein the mute of the microphone is terminated when the user stops pressing the operation key after the key input.

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