JP2997282B2 - Communication equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a communication device, and more particularly to a communication device having a drive mechanism and a speakerphone, and a communication device having a call function and a monitor function.

(Prior Art) Recently, communication devices have become multifunctional, and in particular, a speakerphone function that allows a user to talk without taking up a handset has emerged. Such communication devices include, for example, facsimile machines and multifunctional telephones. These communication devices are equipped with a speakerphone speaker and a microphone, so that the call sound from the other party is output from the speaker, and the voice spoken by the user of the communication device is collected by the microphone. Sent.

On the other hand, such communication devices often include a driving mechanism. For example, a facsimile machine includes a document conveying mechanism of a scanner unit and a recording paper conveying mechanism of a plotter unit, and a multifunctional telephone includes a cassette tape device for recording.

(Problems to be Solved by the Invention) However, in such a conventional communication device, a microphone for a speakerphone or a mounting position of a speaker is arranged in a microphone with an emphasis on sound collection.
Since the speaker was placed with emphasis on audibility, the sound coming out of the speaker was spread by the microphone,
There is a problem that so-called howling occurs.

Further, in a communication device having a drive mechanism, the drive mechanism and the speakerphone may be used at the same time with the advancement of functions. For example, when recording the contents of a conversation with a speakerphone on tape, or when using a two-line storage type telephone to make a speakerphone call on one line and record an answering machine on the other line, and further, a two-line storage type facsimile machine In a case where a speakerphone call is made on one line and a facsimile communication is made on the other line, for example, a problem arises in that the driving sound of the drive mechanism is mixed into the microphone of the speakerphone and hinders the call.

Further, in order to prevent the howling of the speakerphone, it is conceivable to control the communication mechanism and the receiving function of the speakerphone by comparing the level of the transmission signal from the microphone with the level of the reception signal from the line.

However, if the speakerphone and the driving mechanism are used at the same time, there is a problem that the driving sound from the driving mechanism enters from the microphone and is always in the transmitting state when the driving sound is generated.

Therefore, conventionally, for example, in the invention described in JP-A-59-230356, a long-term average value of a transmission system signal is detected, and the transmission / reception function is switched based on the detection result. However, in this case, it is necessary to detect the surrounding noise level, which not only makes the communication device expensive, but also switches the transmission / reception function based on the average level of long-term noise. Therefore, there is a problem that it is not possible to cope with a case where the noise is increased by the operation of the drive mechanism.

In addition, if the drive mechanism operates during use of the speakerphone, there is a problem that it is difficult to hear the received voice from the speaker due to noise from the drive mechanism. Therefore, conventionally, for example, in the invention described in the above-mentioned Japanese Patent Application Laid-Open No. 59-230356, a surrounding noise level is detected, and a gain compression circuit and a gain expansion circuit of a receiving system are detected based on the noise level. Controlling. However, also in this case, similarly to the above, it is necessary to detect the surrounding noise level,
Not only is the communication device expensive, but also because the volume itself is constant, it is difficult to hear the received voice from the speaker when the drive mechanism activates to increase the noise. was there.

Further, in a communication device that accommodates a plurality of lines and has a communication function, a call function, and a monitor function of monitoring communication and outputting sound with a speaker, communication using another line during a call on one line. When the sound is monitored by the monitor function, there is a problem that another communication sound from the monitor function interferes with the call.

(Object of the Invention) In view of the above, the invention according to claim 1, when the driving mechanism and the speakerphone are used at the same time, converts a pseudo signal of the same level as the transmission signal by the driving sound of the driving mechanism into the reception signal from the line. By adding the received signal and the transmitted signal to control the transmitting and receiving functions of the speakerphone, the transmitting and receiving functions of the speakerphone can be appropriately controlled, and during the use of the speakerphone, Another object of the present invention is to enable the use of a drive mechanism and to prevent a decrease in the communication quality of a speakerphone.

According to a second aspect of the present invention, in a communication apparatus accommodating a plurality of lines, when a call is being made on one line, the monitoring of communication on another line is stopped, so that the call is disturbed by a monitor sound. It is intended to prevent such a situation and to make an accurate call.

According to a third aspect of the present invention, in the communication apparatus for controlling the transmission / reception function by comparing the reception signal level and the transmission signal level, the reception signal level is detected when the driving mechanism and the speakerphone are used simultaneously. By switching the sensitivity or the detection sensitivity of the transmission signal level, or by switching the detection sensitivity of the transmission signal level together with the detection sensitivity of the reception signal level, it is affected by noise generated by a drive mechanism such as a scanner or a plotter. Without sending speakerphones
An object of the present invention is to make it possible to appropriately switch a receiving function and to make a comfortable telephone conversation with a speakerphone even during use of a driving mechanism.

(Structure of the Invention) In order to achieve the above object, the invention according to claim 1 provides a drive mechanism, a speaker and a microphone provided for a speakerphone, a transmission signal level from the microphone, and a reception signal level from a line. A communication device that includes a transmission / reception function control unit that controls a transmission function and a reception function of the speakerphone in comparison, wherein the driving mechanism and the speakerphone function may be used at the same time; A constant level signal generating means for generating a pseudo signal having the same level as a transmission signal generated when the sound is input to the microphone; and adding a pseudo signal output from the constant level signal generating means to a reception signal from the line. An addition means for outputting as a reception signal to the transmission / reception function control means, and the constant level signal generation means only when the driving mechanism and the speakerphone are used simultaneously. The communication device according to claim 2, wherein a plurality of lines are accommodated, and a first destination connected by any one of the accommodated lines is provided in the communication device. Communication means for enabling communication with a second party connected via any of the accommodated lines, and communication sound for communication with the second party. Monitoring means for monitoring, and call detecting means for detecting a call made by the calling means with the first party, and while the call detecting means detects that a call is in progress, communication by the monitoring means is provided. The invention according to claim 3, characterized in that the monitoring of the communication sound is stopped, a driving mechanism, a speaker and a microphone provided for a speakerphone, and a reception signal level detecting means for detecting a reception signal level from a line. And my A transmission signal level detecting means for detecting a transmission signal level from the apparatus, and detecting whether or not the driving mechanism is being driven, and switching a detection sensitivity of the reception signal level detecting means or a method for detecting the transmission signal level. Or a detection sensitivity switching unit for switching the detection sensitivity of the reception signal level detection unit and switching the detection sensitivity of the transmission signal level detection unit, and the detection sensitivity based on a driving state of the drive mechanism. Control means for controlling a switching means; and a transmission / reception function for controlling a transmission function and a reception function of a speakerphone by comparing a detection level of the reception signal level detection means with a detection level of the transmission signal level detection means. Switching means, and when the driving mechanism and the speakerphone are used simultaneously, the detection sensitivity switching means causes the reception signal level to be changed. Switching the detection sensitivity of the transmission signal level detection means, or switching the detection sensitivity of the reception signal level detection means, and switching the detection sensitivity of the transmission signal level detection means. It is characterized by.

 Hereinafter, a specific description will be given based on examples.

1 to 5 are views showing an embodiment of the present invention.
This is applied to a facsimile machine.

FIG. 1 is a side view of a facsimile machine 1 as a communication device. The facsimile machine 1 includes a scanner unit 3 and a plotter unit 4 in a housing 2 thereof.

The scanner unit 3 includes a pre-feed roller 5, a separation roller 6, transport rollers 7, 8, a light source 9, mirrors 10, 11, 12, a lens block 13, a photoelectric conversion unit 14, and the like. Light is projected from the light source 9 while conveying the mirror 15 and the reflected light is reflected by the mirrors 10 to 12 and the lens block 13.
Irradiates the photoelectric conversion unit 14 with. The photoelectric conversion unit 14 photoelectrically converts the irradiated light and converts the light into image data as a facsimile control unit.
After that, the facsimile control unit 16 encodes the image data, modulates the image data with a model, and transmits the modulated data.

Each of the rollers 5 to 8 is, as shown in FIG.
A pair of side plates 17 arranged to partition the inside of the housing 2 inside
It is rotatably supported by a and 17b, and is rotationally driven by a drive motor 19 via a gear mechanism. Gear mechanism 18
The drive motor 19 is disposed outside the left side plate 17a in FIG. 2. The transmission of the drive sound of the gear mechanism 18 and the drive motor 19 to the right in the housing 2 is performed by the side plates 17a and 17b.
Blocked by.

On the other hand, the plotter section 4 includes a platen roller 20, a thermal head 21, and the like.
Is recorded on the recording paper 22 by the heat of the thermal head 21 while being transported. The platen roller 20 has a shaft 20a rotatably supported by a plotter side plate (not shown). The platen roller 20 is driven to rotate by a drive motor 24 via a gear mechanism 23. A gear mechanism 23 for driving the platen roller 20 and a drive motor 23 are disposed outside the side plate 17a,
The housing 2 of the drive sound of the gear mechanism 23 and the drive motor 24
The transmission to the right inside is blocked by the side plates 17a and 17b.

The gear mechanism 18, the drive motor 19, the gear mechanism 23, and the drive motor 24 constitute a drive mechanism 25 that emits noise as a whole.

A speaker 26 and a microphone 27 for a speakerphone are mounted in the housing 2.
As shown in FIG. 1, it is disposed above the housing 2 and outside the left side plate 17a, as shown in FIG.
The microphone 27 is disposed below the housing 2 as shown in FIG. 1 and outside the right side plate 17b as shown in FIG. That is, the speaker 26 and the microphone 27 are disposed separately on one side and the other side of the facsimile machine 1 at the upper and lower parts of the housing 2 and are separated by the side plates 17a and 17b of the housing 2 as shown in FIG. The left and right sides of the facsimile machine 1 are separated from each other. Further, as shown in FIG. 2, the drive mechanism 25 and the microphone 27 are disposed separately on one side and the other side of the facsimile apparatus 1 on the left and right sides of the housing 2 partitioned by the side plates 17a and 17b. I have.

As shown in FIG. 3, a hole 28 is formed on the back surface of the housing 2 at a position where the microphone 27 is attached, and the microphone 27 is attached so that the sensor portion faces the hole 28. . A sound collecting wall 29 is provided around the hole 28 on the back surface of the housing 2, and the sound collecting wall 29 is formed of a resin or a rubber material. The sound collecting wall 29 is formed in a substantially rectangular shape that opens toward the front surface (the front side in FIG. 2 and the left side in FIG. 3) of the facsimile machine 1. Hole 28 is located at Therefore,
The voice of the operator speaking in front of the facsimile machine 1 is collected by the sound collecting wall 29 and picked up by the microphone 27 through the hole 28. A rubber foot 30 (only one is shown in FIG. 3) is attached to the square of the housing 2 on the back surface of the housing 2, and the rubber foot 30 is connected to the facsimile machine 1 and the table on which the facsimile machine 1 is arranged. Absorbs the impact sound. Note that the sound collecting wall 29 is not limited to the sound collecting wall 29 shown in FIG. 3, and for example, as shown in FIG. 4, a sound collecting wall 31 in which one side of a rubber plate is cut into a V shape. In this case, the sound collecting wall 31 can also be used as a rubber foot.

As shown in FIG. 5, the facsimile apparatus 1 accommodates two lines, a line L1 and a line L2.
L2 can be used simultaneously. Line L1 is transformer 3
The facsimile control unit 16 is connected to the facsimile control unit 16 via a 2, 2-wire 4-wire conversion circuit 33 and a modem 34.
5, 2-wire 4-wire conversion circuit 36 and speaker drive circuit 3
7. The microphone 26 is connected to the speaker 26 and the microphone 27 via the microphone drive circuit 38. Therefore, while performing facsimile communication using the line L1, it is possible to simultaneously make a call using the speakerphone using the line L2.

 Next, the operation will be described.

The facsimile machine 1 houses two lines L1 and L2,
Both lines L1 and L2 can be used at the same time to perform facsimile communication and talking by speakerphone. Therefore, facsimile transmission and telephone call can be performed simultaneously,
In this case, a call is made using the speaker 26 and the microphone 27 while the gear mechanism 18 for transporting the original and the drive motor 19 are being driven.

However, in the present embodiment, the speaker 26 and the microphone 27 are connected to the upper and lower portions of the housing 2 and the side plates 17a and 17b.
Are separated from each other on the left and right sides of the enclosure 2, that is, on one side and the other side of the facsimile apparatus 1, it is possible to prevent the call sound from the speaker 26 from being mixed into the microphone 27. This can prevent so-called howling from occurring. In addition, microphone 27 and gear mechanism 1
8, the drive motor 19 and the drive mechanism 25 including the gear mechanism 23 and the drive motor 24 are separately disposed on the left and right sides of the housing 2 partitioned by the side plates 17a and 17b, that is, on one side and the other side of the facsimile machine 1. Therefore, it is possible to prevent the drive sound of the drive mechanism 25 from being mixed into the microphone 27. Therefore, call quality can be improved, and a comfortable call can be made. In particular, since the sound is prevented by the side plates 17a and 17b, mixing of sound from the speaker 26 and the driving mechanism 25 can be further prevented.

Further, a hole 28 is formed in the bottom plate of the housing 2 to which the microphone 27 is attached, and the sound collecting wall 29 is provided so as to surround the hole 28, so that mixing of noise outside the facsimile apparatus 1 can be prevented. Thus, the voice of the operator can be effectively collected by the microphone 27, and the communication quality can be further improved.

Note that the arrangement relationship between the speaker 26 and the microphone 27 is not limited to that of the above-described embodiment. For example, FIG.
As shown in (b), the speaker 26 may be provided between the side plate 17a and the side plate 17b at the upper rear of the housing 2 and the microphone 27 may be provided at the front of the housing 2 on the right outside of the side plate 17b. Also, the seventh
As shown in FIGS. 7A and 7B, a speaker 26 is disposed at the upper rear of the housing 2 on the left outside of the side plate 17a, and a microphone 27 is disposed at a lower front of the housing 2 between the side plates 17a and 17b. May be provided. In the case of FIG. 7, the gear mechanisms 18 and 23 are disposed outside the side plate 17a to prevent the driving sounds of the gear mechanisms 18 and 23 having the largest driving sounds from being mixed. Similar action in these cases,
The effect can be obtained.

8 and 9 show an embodiment of the communication apparatus of the present invention, which is applied to a facsimile apparatus.

FIG. 8 is a block diagram of a facsimile apparatus 41 as a communication apparatus. The facsimile apparatus 41 includes a network control unit 42, a modem 43, a scanner 44, a plotter 45, an operation unit 46, a system control unit 47, a transmission / reception talk signal comparison circuit 48. , Switches 49 and 50, a speaker 51, a microphone 52, and the like.

A line L is connected to the network control unit 42 via a transformer 53, and the network control unit 42 controls connection between the line L and the facsimile apparatus 41. That is, the network control unit 42 operates under the control of the system control unit 47 to open and close the line L and to switch between connecting the line L to the modem 43 or connecting to the speaker 51 and the microphone 52. It is carried out. The modem 43 modulates a transmission signal and demodulates a reception signal. As the scanner 44, for example, a CCD (Cha
A line image sensor using an Rge Coupled Device is used, and an image of a document is read line by line and output to the system control unit 47 as image data. As the plotter 45, for example, a thermal recording device using a thermal element is used. Based on the image data from the system control unit 47, the thermal recording paper is directly or indirectly through an ink sheet. Record the image. The scanner 44 and the plotter 45 constitute a drive mechanism 54 of the facsimile apparatus 41 as a whole. The operation unit 46 is provided with numeric keys and various operation keys, a copy key 46a, a liquid crystal display, and the like, and communicates with the operator and the facsimile apparatus 41. The system control unit 47 includes a CPU (Central Processing Unit),
ROM (Read Only Memory), RAM (Random Access Memor)
y), an encoding / decoding unit, a facsimile communication unit, and the like. The ROM stores a basic program of the facsimile apparatus 41 and a copy operation control program of the present invention. System control unit 47 is RO
According to the program in M, encoding / decoding of image data by the encoding / decoding unit, exchange of facsimile control signals by the facsimile communication unit, and control of each unit of the facsimile device 41 to execute the sequence as the facsimile device 41 And executes the copy operation control processing of the present invention. That is, the facsimile apparatus 41 transmits the image data of the original read by the scanner 44 via the line L, and records the image data sent from the line L on a recording paper by the plotter 45. In addition, the image data of the document read by the scanner 44 is output to the plotter 45, and the plotter 45
And a copy mechanism for recording on a recording paper. In this copying operation, both driving mechanisms 54 of the scanner 44 and the plotter 45 are driven.

The speaker 51 and the microphone 52 constitute a speakerphone 55. The speaker 51 loudspeaks the reception signal of the other party transmitted from the line L as a voice, and the microphone 52 is the voice of the operator separated near the facsimile apparatus 41. Is collected and output to the line L as a transmission signal. Transmit / receive signal comparison circuit 48
Compares the received signal with the transmitted signal.If the received signal level is higher than the transmitted signal level, the switch 49 is turned on and the switch 50 is turned off to activate the receiving function, and the transmitted signal level is set to the level of the received signal. If it is larger, the switch 49 is turned off and the switch 50 is turned on to activate the transmission function. That is, the transmission / reception signal comparison circuit 48, the switch 4
Reference numerals 9 and 50 constitute a transmission / reception function control means 56 for comparing the reception signal from the line L and the transmission signal from the microphone 52 to control the transmission function and the reception function.

 Next, the operation will be described.

The facsimile device 41 performs a facsimile transmission operation of transmitting image data of a document read by the scanner 44 and a facsimile reception operation of recording image data sent from the line L on recording paper by the plotter 45, and A copy operation is performed in which the original is read and recorded on recording paper by the plotter 45. Further, the facsimile apparatus 41 can make a speakerphone call with the other party connected via the line L by the speakerphone 55. In this speakerphone call, in order to prevent the sound from the speaker 51 from entering the microphone 52 and causing howling, the transmission / reception signal comparison circuit 48 compares the signal levels of the transmission signal and the reception signal, and determines the signal level. Turn on the switches 49 and 50 of the larger line to switch between the transmission function and the reception function. However, since the above-described copy operation does not use the line L, the copy operation can be performed functionally even during the speakerphone call. However, when the copy operation is performed during the speakerphone call, the drive mechanism 54 is driven. The sound enters from the microphone 52, and the transmission / reception signal comparison circuit 48 always turns on the switch 50 by the driving sound of the driving mechanism 54 to turn on the speakerphone 55.
Function may not work properly.

Therefore, in the present embodiment, when the copy key 46a is pressed while the speakerphone call is being performed, the copy operation is prohibited, and the speakerphone call is properly performed. That is, as shown in the flowchart of the speakerphone operation process in FIG.
When the copy key 46 of the operation unit 46 is turned on (ON) (step S1), it is checked whether or not a call is in progress with the speakerphone 55 (step S2). The system control unit 47 recognizes whether or not a call is being made by the speakerphone 55 by turning on / off a key for operating the speakerphone 55. When a call is not being made through the speakerphone 55, a copy operation is performed by the drive mechanism 54 (step
S3). When a call is being made using the speakerphone 55, the operation of the drive mechanism 54 is prohibited, and the copying operation is prohibited (step S4). At this time, the fact that the copying operation cannot be performed may be displayed on the liquid crystal display of the operation unit 46 because the speakerphone call is being performed, and the operator may be notified of the fact. After that, when the call using the speakerphone 55 ends, the copy operation prohibition is released (step S
3).

Therefore, it is possible to prevent the driving mechanism 54 from operating during the speakerphone call and hinder the call function control operation, or prevent the driving sound of the speakerphone 55 from deteriorating the call quality. Have a conversation.

In the above embodiment, the transmission / reception signal comparison circuit 4
8. The transmission / reception function control means 56 for controlling the transmission function and the reception function by the switches 49 and 50 constitutes the transmission / reception function control means 56, but is not limited thereto.For example, as shown in FIG. The control means 57 may be constituted by a transmission / reception signal comparison circuit 48, a reception signal level control unit 58, and a transmission signal level control unit 59.

Here, the reception signal level control unit 58 operates under the control of the transmission / reception signal comparison circuit 48, and changes the signal level of the reception signal. The transmission signal level control unit 59 includes a transmission / reception signal comparison circuit 48.
And changes the signal level of the transmission signal. That is, the transmission / reception signal comparison circuit 48 compares the signal levels of the reception signal and the transmission signal, and when the reception signal level is higher than the transmission signal level, the signal level of the reception signal level control unit 58 is increased, and the transmission signal level control is performed. The signal level of the unit 59 is reduced.

When the transmission signal level is higher than the reception signal level, the signal level of the transmission signal level control section 59 is increased and the signal level of the reception signal level control section 58 is reduced.

Therefore, in the embodiment shown in FIG.
As in the embodiment shown in FIG. 9, it is possible to prevent the driving mechanism 54 from operating during the speakerphone call and hindering the call function control operation, and to prevent the driving sound of the speakerphone 55 from deteriorating the call quality. And comfortable conversation with the speakerphone 55 can be performed.

11 and 12 show an embodiment of the communication apparatus according to the first aspect of the present invention, which is applied to a facsimile apparatus.

In the description of this embodiment, the same components as those of the embodiment shown in FIG. 8 are denoted by the same reference numerals, and the description thereof will be omitted.

In FIG. 11, reference numeral 61 denotes a facsimile apparatus as a communication apparatus, and the facsimile apparatus 61 includes a network control unit 42 and a modem.
43, a scanner 44, a plotter 45, a system control unit 62, a switch 49, a switch 50, a speaker 50, a microphone 52, a transformer 53, a constant level signal generation circuit 63, an addition circuit 64, a transmission / reception talk signal comparison circuit 48, and the like. . The scanner 44 and the plotter 45 constitute a driving mechanism 54, and the speaker 51 and the microphone 52 constitute a speakerphone 55.

The system control unit 62 is constructed in the same manner as the system control unit 47 shown in FIG. 8, except that its ROM includes, in addition to the basic program as the facsimile apparatus 61, a pseudo signal transmission processing program according to the present invention. Is stored. The constant level signal generating circuit 63 generates a pseudo signal having the same level as or about the same level as a signal level of a transmission signal generated by mixing the driving sound of the driving mechanism 54 from the microphone 52 during a copying operation (hereinafter referred to as an equivalent level). It occurs and its operation is controlled by the system control unit 62. The addition circuit 64 adds the pseudo signal from the constant level signal generation circuit 63 and the reception signal from the line L, and outputs the added reception signal to the transmission / reception signal comparison circuit 48. As in the above embodiment, the transmission / reception signal comparison unit 48 and the switches 49, 50 constitute a transmission / reception function control unit 56.

 Next, the operation will be described.

In this embodiment, the driving mechanism is used during a call using the speakerphone 55.
When the copying operation by 54 is performed, a pseudo signal is generated from the constant level signal generation circuit 63, so that the control operation of the transmission / reception function can be performed normally without lowering the communication quality. Hereinafter, the pseudo signal sending process will be described with reference to the flowchart shown in FIG.

When the copy key 46a of the adding circuit 64 is turned on (step P1), the system control unit 62 checks whether or not a call is being made through the speakerphone 55 (step P1).
2) If the speakerphone call is not in progress, the drive mechanism 54 is operated to start copying (step P3). When the copy operation ends, the flow ends (step P4).

On the other hand, when the copy key 46a is pressed, it is determined that a call is being made through the speakerphone 55 (steps P1, P2).
2) Turn on the constant level signal generation circuit 63 to generate a pseudo signal (step P5). The pseudo signal from the constant level signal generation circuit 63 and the reception signal from the line L are added by the addition circuit 64 and input to the transmission / reception signal comparison circuit 48 as a reception signal for comparison with the transmission signal (step P6). . When the constant level signal generation circuit 63 is turned on, a copy operation is started (step P7), and it is checked whether the copy operation is completed or whether the telephone conversation by the speakerphone 55 is completed (steps P8 and P9). When the copy operation is completed, the constant level signal generation circuit 63 is turned off to terminate the present flow (step P10). When the telephone call by the speakerphone 55 is completed during the copy operation, the constant level signal generation circuit 63 is turned off. Thereafter, when the copy operation is completed, the present flow ends (steps P11 and P12).

As described above, when the speakerphone call and the operation of the driving mechanism are performed at the same time, the transmission / reception function of the speakerphone 55 can be controlled by the transmission / reception signal comparison circuit 48 by adding the pseudo signal to the reception signal. In addition, it is possible to appropriately control the transmission / reception function without lowering the communication quality.

In the present embodiment, a case where a call is made by the speakerphone 55 during the copying operation is not described. However, in this case, the constant level signal generation circuit 63 can be operated to deal with the same.

In the above embodiment, the transmission / reception signal comparison circuit 48
And switches 49 and 50 constitute the transmission / reception function control unit 56, but the present invention is not limited to this. For example, as shown in FIG. 13, the transmission / reception function control unit 65 includes a transmission / reception signal comparison circuit 48. , A reception signal level control unit 66 and a transmission signal level control unit 67. Here, the reception signal level control section 66 operates under the control of the transmission / reception signal comparison circuit 48 and changes the signal level of the reception signal. Transmission signal level control unit
67 operates under the control of the transmission / reception signal comparison circuit 48 to change the signal level of the transmission signal. That is, the transmission / reception signal comparison circuit 48 compares the reception signal with the transmission signal, and when the reception signal level is higher than the transmission signal level, the signal level of the reception signal level control unit 58 is increased, and the transmission signal level control unit
Decrease the signal level of 67. When the transmission signal level is higher than the reception signal level, the signal level of the transmission signal level control section 67 is increased and the reception signal level control section 58 is controlled.
Signal level.

Therefore, also in this embodiment, when the speakerphone call and the copy operation are performed simultaneously, the pseudophone signal is added to the reception signal, and the transmission / reception signal comparison circuit 48 uses the speakerphone.
Since it is possible to control 55 sending and receiving functions,
It is possible to appropriately control the transmission / reception function without lowering the call quality.

Further, in the above embodiment, when the speakerphone call and the driving mechanism are used simultaneously, the pseudophone signal is added to the reception signal, and the transmission / reception signal comparison circuit 48 outputs the speakerphone.
The control of the transmission / reception function of 55 is performed, but the present invention is not limited to this.If the drive mechanism and the speakerphone are used simultaneously, a signal level equivalent to the drive sound of the drive mechanism is obtained from the transmission signal. By subtracting and comparing the transmission signal and the reception signal to control the transmission function and the reception function of the speakerphone, the transmission / reception function of the speakerphone may be controlled. That is, in FIG. 13, the signal level of the transmission signal input from the microphone to the transmission / reception signal comparison section 48 is subtracted to a predetermined signal level by a subtraction circuit disposed therebetween, and this subtraction circuit is controlled by the system control section 62. What is necessary is just to control.

 14 to 16 are views showing an embodiment of the present invention.

FIG. 14 is a block diagram of a facsimile device 71 as a communication device.The facsimile device 71 includes a network control unit 72, a modem 73, a system control unit 74, an operation unit 75, a scanner 76, a plotter 77, and a speakerphone control unit 78. , A microphone 79, a speaker 80, and the like.

A line (for example, a telephone line or a private line)
L is connected, and the network control unit 72 controls connection between the line L and the facsimile machine 71 and the like. The modem 73 modulates a transmission signal and demodulates a reception signal. The system control unit 74 includes a CPU, a ROM, a RAM, and other units as a facsimile device, for example, an encoding / decoding unit, a facsimile communication unit, and the like, and controls each unit of the facsimile device 71 according to a program in the ROM. In addition to executing the sequence as the facsimile apparatus 71, the speaker volume control processing of the present invention is executed. Further, the facsimile apparatus 71 performs encoding and decoding of image data by the encoding / decoding unit, and exchanges facsimile control signals by the facsimile communication unit. The operation unit 75 is provided with ten keys, various operation keys, a copy key 75a, a liquid crystal display, and the like, and communicates between the operator and the facsimile machine 71. As the scanner 76, for example, an image sensor using a CCD is used.
Output to 74. As the plotter 77, for example, a thermal recording device using a thermal element is used, and based on image data from the system control unit 74, the thermal recording paper is directly or indirectly through an ink sheet. To record. The scanner 76 and the plotter 77 constitute a drive mechanism 81 of the facsimile machine 71 as a whole. The speakerphone control unit 78, the microphone 79, and the speaker 80 constitute a speakerphone 82 as a whole, and the speakerphone control unit 78 controls the operation of the microphone 79 and the speaker 80. The microphone 79 collects the voice of the operator who spoke near the facsimile apparatus 71 and outputs it as a transmission signal to the line L, and the speaker 80 loudspeaker outputs the reception signal of the other party transmitted from the line as voice.

The speakerphone control unit 78 has an amplifier circuit 91 as shown in FIG. 15, and the amplifier circuit 91 includes a volume VR, a switch SW, resistors R1, R2, R3, and an op-amp OP. The reception signal from the line L is input to the amplification circuit 91, and the amplification circuit 91 amplifies the reception signal and outputs it to the speaker 80. The volume VR is for the operator to adjust the volume of the speaker 80 by operating the operation unit 75, and the switch SW is turned on / off by an on / off signal from the system control unit 74. The switch SW is connected to bypass the resistor R3, and forms a bypass of the resistor R3 when the switch SW is on. Therefore, the amplifier circuit
Reference numeral 91 indicates that the volume of the speaker 80 is low when the switch SW is on, and increases when the switch SW is off.

 Next, the operation will be described.

The facsimile apparatus 71 transmits the image data of the document read by the scanner 76 via the modem 73 and the network control unit 72, and the facsimile transmission operation, and the image data transmitted from the line L is recorded on the recording paper by the plotter 77. A facsimile reception operation is performed, and a copy operation of recording image data read by the scanner 76 on recording paper by the plotter 77 is performed. Further, the facsimile apparatus 71 can make a speakerphone call using the speakerphone 82 with the other party connected via the line L.

In this speakerphone call, since the voice from the other party is output from the speaker 80, if the facsimile apparatus 71 performs the copy operation during the speakerphone call, the other party's voice from the speaker 80 will be difficult to hear.

Therefore, in the present embodiment, when the driving mechanism 81 is driven while the speakerphone is being used, or when a call is made by the speakerphone 82 while the driving mechanism 81 is being driven, the volume of the speaker 80 is automatically increased. . That is, as shown in the flowchart of FIG.
When 75a is pressed (step Q1), the speakerphone 82
Is checked in use (step Q2), and when the speakerphone 82 is not in use, the switch SW is kept on (step Q3). On the other hand, when the speakerphone 82 is in use, the switch SW is turned off during the copying operation, and the volume of the speaker 80 is increased (steps Q4 and Q5).
Thereafter, when the copy operation is completed, the switch SW is turned on, and the volume is returned to an appropriate volume adjusted by the operator with the volume VR (step Q3).

Therefore, when the use of the speakerphone 82 and the copying operation are performed simultaneously, the volume of the speaker 80 can be automatically increased, and it is possible to prevent the noise of the driving mechanism 81 from making it difficult to hear the voice of the other party. . As a result, conversation by the speakerphone 82 can be appropriately performed.

In the above embodiment, the case where the number of accommodated lines is one has been described, but the present invention can be applied to the case where a plurality of lines are accommodated. In this case, not only when the drive mechanism 81 performs the copy operation, but also when the speakerphone conversation is performed using one line and the facsimile transmission or the facsimile reception is performed using the other line. You can increase the volume of 80.

FIGS. 17 and 18 show an embodiment of the communication apparatus according to the second aspect of the present invention, which is applied to a facsimile apparatus.

FIG. 17 is a block diagram of the facsimile apparatus 100,
The facsimile apparatus 100 includes switches 101, 102, 103, a facsimile communication apparatus (communication means) 104, a communication apparatus (communication means) 105, a monitor speaker apparatus (monitor means) 106,
A handset hook switch 107 and a system controller 108 are provided.

The facsimile apparatus 100 accommodates two lines L1 and L2, and these lines L1 and L2 may be public lines or internal lines connected to a private branch exchange or the like. The line L1 is connected to the switch 101,
The switch 101 operates under the control of the system controller 108 to switch and connect the line L1 to the facsimile communication device 104 and the communication device 105. The line L2 is connected to the switch 102, and the switch 102 performs a differential operation under the control of the system controller 108 to switch and connect the line L2 to the facsimile communication device 104 and the communication device 105. The switch 103 is connected to the line L1, the line L2, and the monitor speaker device 106, and the switch 103 is connected to the system controller 108.
Operating the monitor speaker device 106 under the control of the line L
Switch to 1 and line L2 for connection, and set to a state where nothing is connected. The facsimile communication device 104 includes a communication control unit, an encoding / decoding unit, a modem, a scanner, a plotter, and the like, and performs facsimile communication with a partner facsimile device connected via the lines L1 and L2. Intercom equipment
Reference numeral 105 denotes a telephone line or a handset, which enables a telephone call with a partner such as a telephone connected by the lines L1 and L2. In addition, the communication device 105 also has a call function using a speakerphone in addition to a call using a handset. The monitor speaker device 106 monitors the communication of the line L1 or the line L2 connected by the switch 103, particularly monitors the communication of the facsimile communication device 104, and outputs the communication sound from the speaker. The handset hook switch 107 is provided in the communication device 105, detects a hook state (on-hook / off-hook) of the handset, and outputs the detected state to the system controller.
That is, the handset hook switch 107 is
It constitutes a call detecting means for detecting a call by 05 and outputting it to the system controller 108. The system controller 108 includes a ROM (Read Only Memory) and a RAM (Random Acce
ss Memory), a CPU (Central Processing Unit), and the like, and controls each unit of the facsimile apparatus 100 according to a program in the ROM to perform a facsimile communication function, a call function, and a monitor function. Execute.

 Next, the operation will be described.

The facsimile apparatus 100 has a facsimile communication function, a telephone call function, and a monitor function for monitoring facsimile communication, and can monitor facsimile communication, in particular, a communication signal of the facsimile communication by the monitor speaker device 106.

Further, the facsimile apparatus 100 accommodates two lines L1 and L2, so that facsimile communication by the facsimile communication apparatus 104 and communication by the communication apparatus 105 can be performed simultaneously.

However, when the facsimile communication is monitored by the monitor speaker device 106 and the communication sound is output while the facsimile communication and the call are being performed at the same time, the conversation is disturbed by the monitor sound.

Therefore, in the present invention, it is detected whether or not the communication device 105 is used, and when the communication device 105 is used, monitoring of the facsimile communication by the monitor speaker device 106 is stopped.

That is, as shown in FIG. 18, the system controller 108 sets the monitor speaker device 106 to ON.
It is checked whether or not it is on (step T1), and if it is not on, an off (OFF) process is performed (step T2). When the monitor speaker device 106 is on, it is checked whether the handset hook switch 107 is off-hook (step T3). When the handset is not off-hook, the monitor speaker device 106 is turned on (step T4). When the handset hook switch 107 indicates the off-hook state, the monitor speaker device 106 is turned off (step T5), and the process returns to step T3 to turn off the monitor speaker device 106 until the handset hook switch 107 indicates the on-hook state (step T5). T3, T5). When the monitor speaker device 106 detects the off-hook state, the monitor speaker device 10
6 is turned on (step T4).

Therefore, when communication and a call are being performed simultaneously using a plurality of lines, it is possible to detect that a call is being performed and automatically turn off the monitor function,
The call can be prevented from being disturbed by the monitor sound. Therefore, a comfortable and accurate call can be made.

In the above embodiment, the case where two lines are accommodated has been described. However, the present invention is not limited to this.
The same can be applied to a case where more than lines are accommodated.

Further, in each of the above-described embodiments, a case where the present invention is applied to a facsimile apparatus has been described. However, the present invention is not limited to this, and can be applied to a general communication apparatus having a speakerphone function and a driving mechanism.

19 and 20 show an embodiment of the communication apparatus according to the third aspect of the present invention, which is applied to a facsimile apparatus.

In the description of this embodiment, the same components as those of the embodiment shown in FIG. 8 are denoted by the same reference numerals, and the description thereof will be omitted.

FIG. 19 is a block diagram of a facsimile apparatus 200 as a communication apparatus.
01, modem 43, scanner 44, plotter 45, system control section (control means) 202, received signal level control section 203, transmitted signal level control section 204, received signal level detection section (received signal level detection means) 205, transmission A reception signal comparison unit (transmission / reception function control unit) 206, a transmission signal level detection unit (transmission signal level detection unit) 207, a detection sensitivity switching unit (detection sensitivity switching unit) 208, a speaker 51, a microphone 52, and the like are provided. I have. The scanner 44 and the plotter 45 constitute a driving mechanism 54, and the speaker 51 and the microphone 52 constitute a speakerphone 55.

Two lines L1 and L2 are connected to the connection switching unit 201, and operate under the control of the system control unit 202 to connect the lines L1 and L2.
2 is switched between the modem 43 side (ie, the facsimile function side) and the speakerphone side for connection, and a network control unit is provided to control line connection.

The system control unit 202 is constructed in the same manner as the system control unit 47 of FIG. 8, except that the ROM has a signal detection sensitivity control processing program according to the present invention in addition to the basic program as the facsimile apparatus 200. Is stored.

The reception level control unit 203 operates under the control of the transmission / reception signal comparison unit 206, and controls the signal level of the reception signal from the line.

The transmission signal level control section 204 operates under the control of the transmission / reception signal comparison section 206 and controls the signal level of the transmission signal from the microphone.

The reception signal level detection unit 205 detects the signal level of the reception signal from the line, and compares the detection result with the transmission / reception signal comparison unit 20.
Output to 6.

The transmission signal level detection unit 207 detects the signal level of the transmission signal from the microphone, and compares the detection result with the transmission / reception signal comparison unit.
Output to 206.

The detection sensitivity switching unit 208 operates under the control of the system control unit 202, and controls the detection sensitivity of the transmission signal level detection unit 207. That is, when the driving mechanism 54 such as the scanner 44 or the plotter 45 is used, the system control unit 202 instructs the detection sensitivity switching unit 208 to lower the detection sensitivity of the transmission signal level detection unit 207, and When the mechanism 54 is not used, the detection sensitivity switching unit 208 is instructed to increase the detection sensitivity of the transmission signal level detection unit 207. The detection sensitivity switching unit 208 controls the detection sensitivity of the transmission signal level detection unit 207 according to the instruction. The control of the detection sensitivity of the transmission signal level detection unit 207 may control the detection sensitivity of the transmission signal of the transmission signal level detection unit 207 itself, or the detection sensitivity switching unit 208 may control the transmission signal from the microphone. May be controlled to the transmission signal level detection unit 207 to control the signal level of the transmission signal.

The transmission / reception signal comparison unit 206 compares the detection result of the reception signal level detection unit 207 with the detection result of the transmission signal level detection unit 207, and based on the comparison result, the reception signal level control unit 203
And the operation of the transmission signal level control unit 204. That is, the transmission / reception signal comparison unit 206 is a reception signal level detection unit 2
When the signal level detected at 05 is higher than the signal level detected by the transmission signal level detection unit 207, the signal level of the reception signal level control unit 203 is increased and the signal level of the transmission signal level control unit 204 is reduced. . Further, when the signal level detected by the transmission signal level detection section 207 is higher than the signal level detected by the reception signal level detection section 205, the transmission / reception signal comparison section 206
4, the signal level of the reception signal level control unit 203 is reduced.

 Next, the operation will be described.

According to the present invention, when the driving mechanism and the speakerphone are used simultaneously, the detection sensitivity switching means switches the detection sensitivity of the reception signal level detection means or switches the detection sensitivity of the transmission signal level detection means, Another characteristic is that the detection sensitivity of the reception signal level detection means is switched and the detection sensitivity of the transmission signal level detection means is switched so that the transmission / reception function of the speakerphone is appropriately controlled. Hereinafter, the signal detection sensitivity switching processing will be described with reference to the flowchart shown in FIG.

The system control unit 202 constantly monitors the use state of the scanner 44 and the plotter 45, that is, the drive mechanism 54, stores the state, and monitors the use state of the speakerphone 55,
When the speakerphone 55 is used, the sensitivity of the transmission signal level detection unit 207 is instructed to the detection sensitivity switching unit 208 based on the use state of the drive mechanism 54. That is, the system control unit 2
02 When the speakerphone 55 is used, first, the plotter
Check if the plotter 45 is operating (step R1). If the plotter 45 is operating, the detection sensitivity switching unit 208 is instructed to lower the detection sensitivity of the transmission signal level detection unit 207 by a predetermined amount A1 (step R1). R2). The detection sensitivity switching unit 208 lowers the detection sensitivity of the transmission signal level detection unit 207 by a predetermined amount A1 according to an instruction from the system control unit 202. In step R1, when the plotter 45 is not operating, the scanner
It is checked whether the scanner 44 is operating (step R3). When the scanner 44 is operating, the system control unit 202 instructs the detection sensitivity switching unit 208 to lower the detection sensitivity of the transmission signal level detection unit 207 by the specified amount A2. Instruct (step R4). The detection sensitivity switching unit 208 lowers the detection sensitivity of the transmission signal level detection unit 207 by a predetermined amount A2 according to an instruction from the system control unit 202. Here, the system control unit 202 sets the detection sensitivity switching unit 208
Is changed depending on the type of the drive mechanism 54, that is, whether the scanner 44 is operating or the plotter 45 is operating. This is because the volume of noise generated between the scanner 44 and the plotter 45 is different, and the transmission signal level detection unit 207 has a detection sensitivity suitable for the driving mechanism 54 in operation.
Is controlling. On the other hand, when neither the plotter 45 nor the scanner 44 is operating, the detection sensitivity switching unit 208 is not instructed to reduce the detection sensitivity of the transmission signal level detection unit 207, and the transmission signal level detection unit 207 is informed of the normal detection sensitivity. Causes the transmission signal to be detected.

Therefore, in the communication device that controls the transmission / reception function by comparing the reception signal level and the transmission signal level, when the driving mechanism and the speakerphone are used at the same time, the detection sensitivity switching unit 208 controls the transmission signal level. It is possible to lower the detection sensitivity and appropriately control the transmission / reception function of the speakerphone. As a result, a comfortable call can be made with the speakerphone even during use of the drive mechanism.

In the above-described embodiment, the sensitivity of the transmission signal level is lowered to appropriately control the transmission / reception function of the speakerphone. However, the present invention is not limited to this.
The same effect can be obtained even if the sensitivity of the reception signal level is increased so that the transmission / reception function of the speakerphone is appropriately controlled.

The same effect is obtained not only by changing the detection sensitivity of one of the transmission signal level and the reception signal level, but also by changing the detection sensitivity of both the transmission signal level and the reception signal level. Can be obtained.

Therefore, in a communication device that controls the transmission / reception function by comparing the reception signal level and the transmission signal level, when the driving mechanism and the speakerphone are used simultaneously, the detection sensitivity of the reception signal level is switched or transmitted. By switching the detection sensitivity of the speech signal level, or by switching the detection sensitivity of the reception signal level, and by switching the detection sensitivity of the transmission signal level, the transmission / reception function of the speakerphone can be appropriately controlled. As a result, even during the use of the drive mechanism, a comfortable call can be made with the speakerphone.

(Effect) According to the first aspect of the present invention, when the driving mechanism and the speakerphone are used at the same time, a pseudo signal of the same level as the driving sound of the driving mechanism is added to the reception signal from the line, and the reception signal is added. And the transmission signal from the microphone can be compared to control the transmission / reception function. Therefore, the transmission / reception function of the speakerphone can be appropriately switched, and the driving mechanism can be used even during a telephone conversation with the speakerphone, and a reduction in the quality of the telephone conversation can be prevented.

According to the second aspect of the present invention, when a communication device accommodating a plurality of lines is talking on one line, a communication monitor on another line can be automatically stopped, and the call can be monitored. It can be performed comfortably and accurately without being disturbed by sound.

According to the third aspect of the invention, when the driving mechanism and the speakerphone are used at the same time, the detection sensitivity of the reception signal level is switched, the detection sensitivity of the transmission signal level is switched, or the detection sensitivity of the reception signal level is used. And the detection sensitivity of the transmission signal level is switched, so that the transmission / reception function of the speakerphone can be appropriately controlled without being affected by the noise generated by the driving mechanism. As a result, even during the use of the drive mechanism, a comfortable call can be made with the speakerphone.

[Brief description of the drawings]

1 to 5 are views showing an embodiment of a communication apparatus according to the present invention. FIG. 1 is a side view of a facsimile apparatus as the communication apparatus, FIG. 2 is a top view thereof, and FIG. FIG. 4 is a partial bottom view showing another example of the sound collecting wall, and FIG. 5 is a block diagram thereof. 6 (a) and 6 (b) are diagrams showing another embodiment of the communication device of the present invention. FIG. 6 (a) is a front view thereof, and FIG. 6 (b) is a side view thereof. 7 (a) and 7 (b) are diagrams showing still another embodiment of the communication device of the present invention. FIG. 7 (a) is a front view thereof, and FIG. 7 (b) is a side view thereof. is there. 8 and 9 are diagrams showing an embodiment of the communication apparatus according to the present invention. FIG. 8 is a block diagram of a facsimile apparatus as the communication apparatus, and FIG. 9 is a flowchart of a copy operation process. FIG. 10 is a block diagram of a facsimile apparatus according to another embodiment of the communication apparatus of the present invention. 11 and 12 are diagrams showing an embodiment of the communication device according to the first aspect of the present invention, FIG. 11 is a block diagram of a facsimile device as the communication device, and FIG. It is a flowchart of a process. FIG. 13 is a block diagram of a facsimile apparatus according to another embodiment of the communication apparatus of the present invention. 14 to 16 are diagrams showing an embodiment of the communication device of the present invention, FIG. 14 is a block diagram of a facsimile device as the communication device, and FIG. 15 is a circuit diagram of an amplifier circuit of the speaker. FIG. 16 is a flowchart of the speaker volume control process. 17 and 18 are diagrams showing an embodiment of the communication apparatus according to the second aspect of the present invention. FIG. 17 is a block diagram of a facsimile apparatus as the communication apparatus, and FIG. It is a flowchart. 19 and 20 are diagrams showing an embodiment of the communication apparatus according to the third aspect of the present invention. FIG. 19 is a block diagram of a facsimile apparatus as the communication apparatus, and FIG. 20 is its signal detection sensitivity control processing. It is a flowchart of FIG. DESCRIPTION OF SYMBOLS 1 ... Facsimile machine, 2 ... Casing, 3 ... Scanner part, 4 ... Plotter part, 17a, 17b ... Side plate, 18 ... Gear mechanism, 19 ... Drive motor, 23 ... Gear mechanism, 24 …… Drive motor, 25 …… Drive mechanism, 26 …… Speaker, 27 …… Microphone, 28 …… Hole, 29 …… Sound collecting wall, 30 …… Rubber foot, 31 …… Sound collecting wall, 41,61, 71, 100, 200… facsimile machine (communication device), 42, 72… network control unit, 43, 73… modem, 44, 76… scanner, 45, 77… plotter, 46, 75… operation , 47, 62, 74, 202… System control section, 48… Transmit / receive signal comparison circuit, 49, 50… Switch, 51, 80… Speaker, 52, 79… Microphone, 54, 81… Driving mechanism, 55, 82 ... speakerphone, 63 ... constant level signal generation circuit, 64 ... addition circuit, 78 ... speakerphone control unit, 91 ... amplification circuit, 101, 102, 103 ... Switch 104 facsimile communication device 105 communication device 106 monitor speaker device 107 handset hook switch 108 system controller 201 connection switching unit 202 system control unit 203 ...... Reception level conversion unit, 204 ... Transmission level conversion unit, 205 ... Reception signal level detection unit, 206 ... Transmission / reception signal comparison unit, 207 ... Transmission signal level detection unit, 208 ... Detection sensitivity switching Department.

Continuation of the front page (31) Priority claim number Japanese Patent Application No. 1-325635 (32) Priority date December 15, 2001 (December 15, 1989) (33) Priority claim country Japan (JP) (56) References JP-A-63-301608 (JP, A) JP-A-62-58952 (JP, U) JP-A-62-61562 (JP, U) JP-A-62-61563 (JP, U) JP-A-63 -10622 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 1/60-1/62 H04M 11/00 302 H04N 1/00 107

Claims (3)

(57) [Claims] 1. A driving mechanism, a speaker and a microphone provided for a speakerphone, and a transmission function and a reception function of the speakerphone controlled by comparing a transmission signal level from the microphone and a reception signal level from a line. Transmitting and receiving function control means, and a driving mechanism and a speakerphone function may be used at the same time, in a communication device, the driving sound of the driving mechanism is equivalent to a transmitting signal generated by inputting to the microphone. Constant level signal generating means for generating a pseudo signal of a level; adding means for adding the pseudo signal output from the constant level signal generating means to a reception signal from a line and outputting the reception signal to the transmission / reception function control means as a reception signal. , And the pseudo signal from the constant level signal generating means is added to the reception signal only when the driving mechanism and the speakerphone are used at the same time. Communication apparatus. 2. A communication means accommodating a plurality of lines and enabling communication with a first destination connected by any one of the accommodated lines, and a communication means connected by any one of the accommodated lines. Communication means for enabling communication with the second destination, monitoring means for monitoring the communication sound of communication with the second destination, and detecting communication with the first destination by the communication means. A communication detecting means, wherein the monitoring of the communication sound of the communication by the monitoring means is stopped while the call detecting means detects that the telephone call is in progress. 3. A drive mechanism, a speaker and a microphone provided for a speakerphone, a reception signal level detecting means for detecting a reception signal level from a line, and a transmission signal level for detecting a transmission signal level from the microphone. Detecting means for detecting whether the drive mechanism is being driven, and switching the detection sensitivity of the reception signal level detection means or switching the detection sensitivity of the transmission signal level detection means, or detecting the reception signal level. Detection sensitivity switching means for switching the detection sensitivity of the means and switching the detection sensitivity of the transmission signal level detection means, and control means for controlling the detection sensitivity switching means based on the driving state of the drive mechanism;
A transmission / reception function control means for comparing a detection level of the reception signal level detection means with a detection level of the transmission signal level detection means to control a transmission function and a reception function of the speakerphone, and a driving mechanism And the speakerphone are used simultaneously, the detection sensitivity switching means switches the detection sensitivity of the reception signal level detection means or switches the detection sensitivity of the transmission signal level detection means,
Alternatively, the communication device switches the detection sensitivity of the reception signal level detection means and switches the detection sensitivity of the transmission signal level detection means.