JP2012019280A - Facsimile device and power supply control method for facsimile device - Google Patents

Abstract

A facsimile apparatus and a power supply control method for the facsimile apparatus capable of reducing wasteful power consumption are provided.
A power control switch is provided on a power supply line from a power supply VCC on a line controller board to an external telephone detection circuit. The line control device 17 sends a power control signal D4 to the power control switch 31 in synchronization with sending the relay control signal D1 to the mechanical switch 21 that switches between connection / disconnection of the external telephone 22 and the public line 20. While the external telephone 22 is disconnected from the public line 20, the power control switch 31 is supplied with the power supply VCC 1 to the external telephone detection circuit 18 and while the external telephone 22 is connected to the public line 20. Opens and closes in response to the power control signal D4 so that the power supply to the external telephone detection circuit 18 is cut off.
[Selection] Figure 3

Description

  The present invention relates to a facsimile apparatus to which an external telephone can be connected and a power supply control method for the facsimile apparatus.

  2. Description of the Related Art Conventionally, some facsimile apparatuses that transmit and receive data using a public line can connect telephones externally. In such a facsimile apparatus to which an external telephone can be connected, if the external telephone is left connected to the public line, the external telephone will ring even when a call is made for facsimile communication. Become. Therefore, in a facsimile machine that can be connected to an external telephone, a mechanical switch (relay) for switching connection / disconnection between the external telephone and the public line is mounted, and the external telephone is normally disconnected from the public line. In general, when an external phone goes off-hook (with the handset disconnected) or when a call signal to the external phone is received, the external phone is connected to the public line. It is.

  Also, in a facsimile machine that can be connected to an external telephone, this is detected when the external telephone is switched from the on-hook state (the handset is placed) to the off-hook state with the external telephone disconnected from the public line. It is also known to separately provide a circuit for detecting an off-hook state of an external telephone so that it can be connected to a public line. For example, Patent Document 1 describes an off-hook detection circuit that can detect an off-hook state of an external telephone even when the external telephone is disconnected from a public line.

  However, in the conventional facsimile apparatus to which an external telephone can be connected, the power is always supplied to the circuit that detects the off-hook state of the external telephone disconnected from the public line even while the external telephone is connected to the public line. There was a problem that power was wasted because it was supplied.

  The present invention has been made in view of the above, and an object of the present invention is to provide a facsimile apparatus and a power supply control method for the facsimile apparatus that can reduce wasteful power consumption.

  In order to solve the above-mentioned problems and achieve the object, the present invention provides a switching device for switching connection / disconnection between the external telephone and a public line in a facsimile apparatus to which an external telephone can be connected, and the external An off-hook detection means for detecting an off-hook state of the external telephone connected to the external telephone when the telephone is disconnected from a public line, and an off-hook state detected by the off-hook detection means; or The switching means is configured to connect the external telephone to a public line when a call signal to the external telephone is received, and to disconnect the external telephone from the public line when the external telephone enters an on-hook state. While the line control means for controlling the operation and the external telephone are disconnected from the public line, Power is supplied to the hook detection means, while the external telephone is connected to a public line, characterized in that and a first power supply control means for interrupting the power supply to the off-hook detecting means.

  The present invention also provides switching means for switching connection / disconnection between an external telephone and a public line, and is connected to the external telephone when the external telephone is disconnected from the public line. Off-hook detection means for detecting an off-hook state; and when the off-hook state is detected by the off-hook detection means or when a call signal to the external telephone is received, the external telephone is connected to a public line, And a line control means for controlling the operation of the switching means so that the external telephone is disconnected from the public line when the attached telephone is in an on-hook state. While the telephone is disconnected from the public line, power is supplied to the off-hook detection means, and the external power supply is supplied. While the machine is connected to a public line, characterized in that shut off the power supply to the off-hook detecting means.

  According to the present invention, power is supplied to the off-hook detection circuit only when the external telephone is disconnected from the public line and connected to the off-hook detection circuit, so that it is possible to reduce wasteful power consumption. .

FIG. 1 is a schematic configuration diagram of a facsimile apparatus according to the embodiment. FIG. 2 is a block diagram of a controller board provided in a conventional facsimile apparatus. FIG. 3 is a block diagram of the controller board in the first embodiment. FIG. 4 is a sequence diagram of power control for the external telephone detection circuit. FIG. 5 is a flowchart of power control for the external telephone detection circuit by the line control device. FIG. 6 is a block diagram of a controller board in the second embodiment. FIG. 7 is a block diagram of a controller board in a conventional facsimile apparatus having a pseudo ringing circuit. FIG. 8 is a block diagram of a controller board in the third embodiment. FIG. 9 is a block diagram of a controller board in the fourth embodiment. FIG. 10 is a block diagram of a controller board in the fifth embodiment.

  Exemplary embodiments of a facsimile machine and a power control method for the facsimile machine according to the present invention will be explained below in detail with reference to the accompanying drawings.

  The facsimile apparatus of this embodiment is a facsimile apparatus that can be connected to an external telephone, and the connection / disconnection between the external telephone connected to the apparatus main body and the public line can be switched by a mechanical switch. In addition, this facsimile apparatus includes an off-hook detection circuit that detects when an external telephone is off-hook when disconnected from the public line, and an external telephone when the external telephone is disconnected from the public line. A dial detection circuit for detecting a dial operation of the telephone (hereinafter, an off-hook detection circuit and a dial detection circuit are collectively referred to as an “external telephone detection circuit”) is provided.

  The external telephone detection circuit is used by being connected to the external telephone when the external telephone is disconnected from the public line by the operation of the mechanical switch. Therefore, the power supply of the external telephone detection circuit need only be supplied when the external telephone is disconnected from the public line. Therefore, in the facsimile apparatus according to the present embodiment, the external telephone detection circuit is synchronized with software control for controlling the operation of the mechanical switch for switching connection / disconnection between the external telephone and the public line (using the same signal line). The power supply is controlled so that power is supplied to the external telephone detection circuit only when the external telephone is disconnected from the public line and connected to the external telephone detection circuit.

(Overall configuration of facsimile machine)
First, the overall configuration of the facsimile apparatus of this embodiment will be described. FIG. 1 is a schematic configuration diagram of a facsimile machine 1 according to the present embodiment. As shown in the figure, the facsimile apparatus 1 of this embodiment includes a control unit 11, an operation display unit 12, a FAX controller board (FCU) 13, a scanner 14, and a plotter 15, and these devices are connected via a system bus 19. Connected. A line controller board (CCU) 16 is connected to the FAX controller board (FCU) 13. The line controller board (CCU) 16 is equipped with a line control device 17 and an external telephone detection circuit 18.

  The facsimile apparatus 1 of this embodiment is connected to a public line 20 via a line control device 17 on a line controller board 16. The facsimile apparatus 1 of the present embodiment includes a mechanical switch (relay) 21, and an external telephone 22 is connected to the mechanical switch 21. The operation of the mechanical switch 21 is controlled by a relay control signal sent from the line control device 17 and selectively connects the external telephone 22 to either the public line 20 or the external telephone detection circuit 18.

  The control unit 11 manages and controls the entire facsimile apparatus according to a built-in program.

  The operation display unit 12 includes an input unit that receives input of various setting information by the user, and a display unit that displays various information to the user.

  The FAX controller board (FCU) 13 has a FAX control device 25 and a memory 26. The FAX control device 25 controls the system bus 19 and the memory 26. The FAX control device 25 has a DCR (image information compression / playback unit) function. The memory 26 includes a page memory that can temporarily store image information in units of pages, and a storage device that stores various programs and control data.

  The scanner 14 is a reading device that reads an image of a document.

  The plotter 15 is an output device that prints out received image information decoded by the DCR function in the FAX control device 25 via the memory 26, for example.

  The line controller board (CCU) 16 is a communication control device that controls transmission / reception of facsimile data, and has a function of performing signal conversion and error control for communication. The line controller board (CCU) 16 is connected to a FAX control device 25 in the FAX controller board (FCU) 13. The image data read by the scanner 14 is encoded (compressed) by the DCR function of the FAX control device 25 and transmitted to the line control device 17 in the line controller board (CCU) 16. The DCR function of the FAX control device 25 also decodes (decompresses) facsimile data (received image information) received by the line control device 17.

  The line control device 17 is a network control apparatus that connects the facsimile apparatus 1 to the public line 20 and executes and controls transmission / reception of facsimile data using the public line 20. Further, the line control device 17 determines whether or not the external telephone 22 and the public line 20 need to be connected according to an off-hook detection signal from the external telephone detection circuit 18 and sends a relay control signal to the mechanical switch 21. The operation of the mechanical switch 21 is controlled. As the line control device 17, for example, a modem is used.

  The external telephone detection circuit 18 is a circuit connected to the external telephone 22 when the external telephone 22 is disconnected from the public line 20 by the operation of the mechanical switch 21. In the present embodiment, the above-described off-hook detection circuit. And a dial detection circuit. The off-hook detection circuit continues to supply, for example, 24V power to the external telephone 22 when the external telephone 22 is disconnected from the public line 20, and the handset of the external telephone 22 is taken and the 24V power supply is removed. It is a circuit that detects that the handset of the external telephone 22 has been taken (off-hook state) by detecting this current when the current flows out. The dial detection circuit detects that the PB / DP dial number of the external telephone 22 has been pressed. When the off-hook detection circuit detects an off-hook state of the external telephone 22 disconnected from the public line 20, it sends an off-hook detection signal to the line control device 17. Further, when the dial detection circuit detects a dial operation of the external telephone 22 disconnected from the public line 20, a signal for detecting a DTMF (Dial (Dual) Tone Multi-Frequency) / dial pulse corresponding to the dial operation is generated. It is sent to the line control device 17.

(First embodiment)
Next, a specific example (first embodiment) of power supply control to the external telephone detection circuit 18 of the facsimile apparatus 1 configured as described above will be described with reference to FIGS. FIG. 2 is a block diagram of a line controller board provided in the conventional facsimile apparatus, and FIG. 3 is a block diagram of the line controller board 16 in the first embodiment. In the conventional example of FIG. 2, the same reference numerals are given to the components common to the facsimile apparatus 1 of the present embodiment.

  When a user makes a call using the external telephone 22 attached to the facsimile apparatus 1, the external telephone 22 is connected to the facsimile apparatus 1 and the external telephone 22 is connected via the line controller board 16 of the facsimile apparatus 1. Is connected to the public line 20 to make a call. On the other hand, when a call is made from the public line 20 to the facsimile apparatus 1 including the line controller board 16, if the external telephone 22 remains connected to the public line 20, even if the cause of the call is a facsimile factor, The external telephone 22 will ring. For this reason, the user of the facsimile apparatus 1 thinks that a telephone call is made to the facsimile apparatus 1 and acts to pick up the handset of the external telephone 22, but if the incoming call is a facsimile factor, the user is useless. I have done an act.

  In order to solve this problem, in the conventional facsimile apparatus and the facsimile apparatus 1 of the present embodiment, as shown in FIGS. 2 and 3, a mechanical switch 21 is mounted on the line controller board 16, and the external telephone 22 is connected to this mechanical apparatus. The switch 21 is connected. The line control device 17 sends a relay control signal D1 to the mechanical switch 21 to control the operation of the mechanical switch 21 so as to switch connection / disconnection between the external telephone 22 and the public line 20. Specifically, the line control device 17 is, for example, when the external telephone 22 is in an off-hook state or when it is determined that the incoming call to the facsimile apparatus 1 is a telephone factor (that is, the external telephone 22 A high level relay control signal D1 is sent to the external telephone 22 to connect to the public line 20, and when the external telephone 22 is in an on-hook state, a low level relay is transmitted. A control signal D1 is transmitted to disconnect the external telephone 22 from the public line 20.

  Here, when the external telephone 22 is connected to the public line 20, the off-hook state and dialing operation of the external telephone 22 can be detected by the line control device 17, but the external telephone 22 is connected by the mechanical switch 21. In the state disconnected from the public line 20, the external telephone 22 is also disconnected from the line control device 17 at the same time, so that the off-hook state of the external telephone 22 cannot be detected. Therefore, an external telephone detection circuit 18 including an off-hook detection circuit and a dial detection circuit is provided, and the external telephone 22 disconnected from the public line 20 is connected to the external telephone detection circuit 18 so that the external telephone 22 is connected to the public telephone. When disconnected from the line 20, the external telephone detection circuit 18 detects off-hook or dials. 2 and 3, D2 indicates an off-hook detection signal sent to the line control device 17 when the external telephone detection circuit 18 detects an off-hook state of the external telephone 22, and D3 indicates an external hook detection signal. A signal for detecting a DTMF / dial pulse sent to the line control device 17 when the dial telephone operation of the external telephone 22 is detected by the attached telephone detection circuit 18 is shown.

  As described above, the external telephone detection circuit 18 is connected to the external telephone 22 and used when the external telephone 22 is disconnected from the public line 20 by the operation of the mechanical switch 21. However, since the conventional facsimile apparatus is configured to supply the power VCC on the line controller board 16 to the external telephone detection circuit 18 in common with the line control device 17 as shown in FIG. Even when the telephone 22 is connected to the public line 20, that is, when the external telephone 22 is not connected to the external telephone detection circuit 18, power is supplied to the external telephone detection circuit 18. There was a problem of wasting power.

  On the other hand, in the facsimile apparatus 1 of this embodiment, as shown in FIG. 3, the power supply VCC on the line controller board 16 is connected to the power supply line from the external telephone detection circuit 18 to the external telephone detection circuit 18. A power control switch 31 is provided for controlling the power supply. The operation of the power control switch 31 is controlled by sending the power control signal D4 to the power control switch 31 in synchronization with the line control device 17 sending the relay control signal D1 to the mechanical switch 21. While the external telephone 22 is disconnected from the public line 20, the power supply VCC 1 is supplied to the external telephone detection circuit 18, and while the external telephone 22 is connected to the public line 20, the external telephone is connected. The power supply to the detection circuit 18 is cut off. In the facsimile apparatus 1 of the present embodiment, the power control switch 31 whose operation is controlled in accordance with the power control signal D4 from the line control device 17 is a “first power control means” described in the claims. Equivalent to.

  FIG. 4 is a sequence diagram of power control for the external telephone detection circuit 18. The line control device 17 is activated, for example, when the power of the facsimile apparatus 1 is turned on at time T0 and the power supply VCC on the line controller board 16 is supplied. At this time, the line control device 17 sends a low level relay control signal D1 to the mechanical switch 21 to disconnect the external telephone 22 from the public line 20. The line control device 17 sends a low-level power control signal D4 to the power control switch 31 while sending a low-level relay control signal D1 to the mechanical switch 21. The power control switch 31 closes the switch when a low-level power control signal D4 is input. As a result, the power supply VCC1 is supplied to the external telephone detection circuit 18.

  Thereafter, when the external telephone detection circuit 18 detects that the external telephone 22 is in an off-hook state at time T1 and the off-hook detection signal D2 is sent, or a call signal to the external telephone 22 is received. In this case, the line control device 17 sends a high level relay control signal D 1 to the mechanical switch 21 to connect the external telephone 22 to the public line 20. The line control device 17 sends a high-level power control signal D4 to the power control switch 31 in synchronization with sending the high-level relay control signal D1 to the mechanical switch 21. When a high-level power control signal D4 is input, the power control switch 31 opens the switch and cuts off power supply to the external telephone detection circuit 18.

  Thereafter, when the user finishes using the external telephone 22 at time T2 and the external telephone 22 enters an on-hook state, the line control device 17 sends a low-level relay control signal D1 to the mechanical switch 21. Then, the external telephone 22 is disconnected from the public line 20. In addition, the line control device 17 sends a low-level power control signal D4 to the power control switch 31 in synchronization with sending the low-level relay control signal D1 to the mechanical switch 21, and externally attaches it. The supply of the power supply VCC1 to the telephone detection circuit 18 is resumed.

  FIG. 5 is a flowchart of power control for the external telephone detection circuit 18 by the line control device 17. The control shown in the flowchart of FIG. 5 is started when the power of the facsimile apparatus 1 is turned on and the line control device 17 is activated.

  When the flow of FIG. 5 is started, the line control device 17 first sends a low-level relay control signal D1 to the mechanical switch 21 and a low-level power supply to the power control switch 31 in step S101. A control signal D4 is sent out. As a result, the mechanical switch 21 operates to disconnect the external telephone 22 from the public line 20 and connect it to the external telephone detection circuit 18. Further, the power supply control switch 31 is closed, and the supply of the power supply VCC1 to the external telephone detection circuit 18 is started.

  Next, in step S102, the line control device 17 determines whether or not the off-hook detection signal D2 is transmitted from the external telephone detection circuit 18 or the calling signal is received to the external telephone 22. If the off-hook detection signal D2 from the external telephone detection circuit 18 has not been sent and the call signal to the external telephone 22 has not been received (step S102: NO), the low level in step S101. The relay control signal D1 and the low-level power control signal D4 are repeatedly transmitted.

  On the other hand, when the off-hook detection signal D2 is sent from the external telephone detection circuit 18 or when the call signal to the external telephone 22 is received (step S102: YES), the line control device 17 In step S103, a high level relay control signal D1 is sent to the mechanical switch 21, and a high level power control signal D4 is sent to the power control switch 31. As a result, the mechanical switch 21 operates to connect the external telephone 22 to the public line 20. Further, the power control switch 31 is opened, and the supply of the power supply VCC1 to the external telephone detection circuit 18 is cut off.

  Next, in step S104, the line control device 17 determines whether or not the external telephone 22 is in an on-hook state. If the external telephone 22 remains off-hook (step S104: NO), the high-level relay control signal D1 and the high-level power control signal D4 are repeatedly sent in step S103. On the other hand, when the external telephone 22 is in an on-hook state (step S104: YES), the process returns to step S101 to send a low-level relay control signal D1 to the mechanical switch 21, and the power control switch A low-level power control signal D4 is sent to 31 and the subsequent processing is repeated.

  As described above, in the first embodiment, the line control device 17 sends the power control signal D4 to the power control switch 31 in synchronization with sending the relay control signal D1 to the mechanical switch 21. The operation of the power control switch 31 is controlled by the power supply VCC1 to the external telephone detection circuit 18 while the external telephone 22 is disconnected from the public line 20, and the external telephone 22 is connected to the public line 20. While connected, the power supply to the external telephone detection circuit 18 is cut off. Therefore, the power supply VCC1 can be supplied to the external telephone detection circuit 18 only when the external telephone 22 is disconnected from the public line 20 and connected to the external telephone detection circuit 18, and wasteful power consumption is achieved. Can be reduced.

(Second embodiment)
Next, another example (second embodiment) of power supply control to the external telephone detection circuit 18 will be described with reference to FIG. FIG. 6 is a block diagram of the line controller board 16 in the second embodiment. As shown in FIG. 6, the present embodiment is similar to the first embodiment in that the external telephone detection circuit 18 includes an off-hook detection circuit 18a and a dial detection circuit 18b, but the off-hook detection circuit 18a The power supply to the dial detection circuit 18b is started when the off-hook state of the external telephone 22 is detected, and the power supply to the dial detection circuit 18b is cut off when the dial operation of the external telephone 22 is finished. It is.

  In the first embodiment, as described above, when the external telephone 22 is disconnected from the public line 20 and connected to the external telephone detection circuit 18, the power supply VCC1 is supplied to the external telephone detection circuit 18. I try to do it. That is, in the first embodiment, when the external telephone 22 is disconnected from the public line 20 and connected to the external telephone detection circuit 18, the off-hook detection circuit 18a and the dial detection circuit 18b in the external telephone detection circuit 18 are connected. Both are supplied with power supply VCC1.

  However, the user uses the dial button using the external telephone 22 only when the handset of the external telephone 22 is lifted, that is, when the external telephone 22 is in an off-hook state. For this reason, the function of the dial detection circuit 18b is not used until the off-hook state of the external telephone 22 is detected by the off-hook detection circuit 18a. Accordingly, when the power supply VCC1 is supplied to both the off-hook detection circuit 18a and the dial detection circuit 18b when the external telephone 22 is disconnected from the public line 20 and connected to the external telephone detection circuit 18, the off-hook detection circuit 18a supplies the external power supply VCC1. Until the off-hook state of the attached telephone 22 is detected, the dial detection circuit 18b consumes power wastefully.

  In order to solve this problem, in this embodiment, a second power supply line for controlling the power supply to the dial detection circuit 18b is connected to the power supply line connected to the dial detection circuit 18b from the power control switch 31 described in the first embodiment. The power supply control switch 32 is provided. When the off-hook detection circuit 18a detects the off-hook state of the external telephone 22 and sends an off-hook detection signal D2, the off-hook detection signal D2 is sent not only to the line control device 17 but also to the second power control switch 32. Is also entered.

  The second power supply control switch 32 is normally in an open state. When the offhook detection signal D2 is input from the offhook detection circuit 18a, the second power supply control switch 32 is closed and supplies the power supply VCC2 to the dial detection circuit 18b. . Further, the second power control switch 32 returns to the opened state when the dial operation of the external telephone 22 is finished and the transmission of the DTMF detection signal D3 from the dial detection circuit 18b is stopped. Accordingly, the supply of the power supply VCC2 to the dial detection circuit 18b is started when the off-hook detection circuit 18a detects the off-hook state of the external telephone 22, and is cut off when the external telephone 22 is on-hook. The second power control switch 32 in this embodiment corresponds to “second power control means” described in the claims.

  As described above, in the second embodiment, power supply to the dial detection circuit 18b is started when the off-hook detection circuit 18a detects the off-hook state of the external telephone 22, and dialing is performed when the external telephone 22 is on-hook. Since the power supply to the detection circuit 18b is cut off, wasteful power consumption can be further reduced as compared with the first embodiment.

(Third embodiment)
Next, a specific example (third example) of power supply control in a configuration further including a pseudo ringing circuit will be described with reference to FIGS. FIG. 7 is a block diagram of a line controller board in a conventional facsimile apparatus provided with a pseudo ringing circuit, and FIG. 8 is a block diagram of a line controller board 16 in the third embodiment. In addition, in the prior art example of FIG. 7, the same code | symbol is attached | subjected to the component which is common in a present Example.

  When a call is made from the public line 20 to the facsimile apparatus 1 with the external telephone 22 disconnected from the public line 20, the line control device 17 receives the call signal (off-hook) and makes a call. It is determined whether the factor is a call to the external telephone 22. Here, when the call source is a call to the external telephone 22, it is necessary to ring the external telephone 22 so that the user can pick up the handset of the external telephone 22. However, for a call from the public line 20, since the line control device 17 has already been off-hook, the ringing from the public line 20 stops. Therefore, in order to ring the external telephone 22, it is necessary for the facsimile apparatus 1 itself to ring the external telephone 22. Therefore, as shown in FIGS. 7 and 8, a pseudo sounding circuit 24 for making the external telephone 22 sound like a sound is mounted on the line controller board 16, and the pseudo sounding is performed by the pseudo sounding control signal D5 sent from the line control device 17. The circuit 24 causes the external telephone 22 to ring.

  Here, in the conventional facsimile apparatus including the pseudo ringing circuit 24, the power supply VCC on the line controller board 16 is shared with the line control device 17 and the external telephone detection circuit 18 as shown in FIG. 24 is also supplied. For this reason, even when the line control device 17 receives a call signal from the public line 20 to the external telephone 22, that is, when the external telephone 22 needs to be simulated, On the other hand, there is a problem that power is supplied and wastes power.

  On the other hand, in this embodiment, as shown in FIG. 8, the power supply line from the power supply VCC on the line controller board 16 to the power supply line to the pseudo sound circuit 24 is controlled to supply power to the pseudo sound circuit 24. A third power control switch 33 is provided. The simulated sound control signal D5 supplied from the line control device 17 to the simulated sound circuit 24 is also input to the third power control switch 33. The power supply VCC1 is supplied from the power supply VCC on the line controller board 16 to the external telephone detection circuit 18 to the external telephone detection circuit 18 in response to the power control signal D4 from the line control device 17. The point that the power supply control switch 31 to be controlled is provided is the same as in the first embodiment.

  The third power control switch 33 is normally in an open state, and is switched on when a pseudo ringing control signal D5 sent from the line control device 17 in response to reception of a calling signal to the external telephone 22 is input. The power supply VCC3 is supplied to the pseudo ringing circuit 24. Further, the third power control switch 33 is in a state where the external telephone 22 is in an off-hook state and the pseudo sound control signal D5 from the line control device 17 is stopped, or the external telephone 22 is in a pseudo sound state. When the pseudo ringing control signal D5 from the line control device 17 is stopped for a predetermined time, the switch is returned to the opened state. Accordingly, the supply of the power supply VCC3 to the pseudo ringing circuit 24 is started when a call signal to the external telephone 22 is received, and when the external telephone 22 enters an off-hook state or the pseudo ringing of the external telephone 22 is predetermined. It will be shut off when it continues for a time. The third power control switch 33 in the present embodiment corresponds to “third power control means” described in the claims.

  As described above, in the third embodiment, power supply to the pseudo ringing circuit 24 is started when a call signal for the external telephone 22 is received, and the external telephone 22 enters an off-hook state, or an external telephone. Since the power supply to the pseudo sounding circuit 24 is cut off when the pseudo sounding 22 continues for a predetermined time, wasteful power consumption can be further reduced as compared with the first embodiment.

(Fourth embodiment)
Next, another example (fourth embodiment) of power supply control to the external telephone detection circuit 18 will be described with reference to FIG. FIG. 9 is a block diagram of the line controller board 16 in the fourth embodiment. In this embodiment, as shown in FIG. 9, the configuration of the line controller board 16 is the same as that of the first embodiment, but the user connects the external telephone 22 to the facsimile apparatus 1 using the operation display unit 12. Is input to the line control device 17 from the operation display unit 12. The signal line of the power control signal D4 sent from the line control device 17 to the power control switch 31 is independent of the signal line of the relay control signal D1 sent from the line control device 17 to the mechanical switch 21. .

  In the first embodiment, on the assumption that the external telephone 22 is connected to the facsimile apparatus 1, the external telephone 22 is connected to the public line 20, or disconnected from the public line 20 and externally connected. The power supply to the external telephone detection circuit 18 is controlled depending on whether it is connected to the telephone detection circuit 18. However, the external telephone 22 can be freely attached to and detached from the facsimile machine 1 by the user. Further, the state in which the external telephone 22 is not connected to the facsimile apparatus 1 and the state in which the external telephone 22 is on-hook are determined to be the same state as viewed from the line controller board 16, and cannot be determined. For this reason, when the external telephone 22 is not connected to the facsimile apparatus 1, it is assumed that power is supplied to the external telephone detection circuit 18, and there is a concern that power is wasted.

  Therefore, in this embodiment, when the external telephone 22 is connected to the facsimile apparatus 1, setting information indicating that the external telephone 22 is connected using the operation display unit 12 should be input to the user. To announce. This notification may be, for example, provision of information by an instruction manual or the like, or information indicating that may be displayed on the operation display unit 12. When the user inputs setting information indicating that the external telephone 22 is connected to the facsimile apparatus 1 using the operation display unit 12, the setting information is input from the operation display unit 12 to the line control device 17. I am doing so.

  The line control device 17 determines whether or not the external telephone 22 is connected to the facsimile apparatus 1 based on the setting information from the operation display unit 12. When the external telephone 22 is connected to the facsimile apparatus 1, the operation of the power control switch 31 is controlled by the power control signal D4 synchronized with the relay control signal D1, as in the first embodiment. As a result, the power supply VCC1 is supplied to the external telephone detection circuit 18 while the external telephone 22 is disconnected from the public line 20, and the external telephone 22 is externally connected while the external telephone 22 is connected to the public line 20. The power supply to the telephone detection circuit 18 is cut off. On the other hand, when the external telephone 22 is not connected to the facsimile apparatus 1, the power supply that is always at a high level with respect to the power control switch 31 regardless of the state of the relay control signal D1 sent to the mechanical switch 21. A control signal D4 is sent out. As a result, the power control switch 31 is always open, and the state where the power supply to the external telephone detection circuit 18 is cut off is maintained.

  As described above, in the fourth embodiment, when the external telephone 22 is connected to the facsimile apparatus 1, the external telephone detection circuit 18 is connected to the external telephone 22 while the external telephone 22 is disconnected from the public line 20. On the other hand, while the power supply VCC1 is supplied and the external telephone 22 is connected to the public line 20, the power supply to the external telephone detection circuit 18 is cut off, and the external telephone 22 is connected to the facsimile apparatus 1. If not, since the state where the power supply to the telephone detection circuit 18 is cut off is maintained, the wasteful power consumption can be further reduced as compared with the first embodiment.

(5th Example)
Next, another example (fifth embodiment) of power supply control in a configuration further including a pseudo ringing circuit will be described with reference to FIG. FIG. 10 is a block diagram of the line controller board 16 in the fifth embodiment. The present embodiment is a combination of the third embodiment and the fourth embodiment. As shown in FIG. 10, the pseudo ringing circuit 24 described in the third embodiment is compared with the configuration of the fourth embodiment. And the 3rd power supply control switch 33 is added.

  In the present embodiment, as in the fourth embodiment, the line control device 17 determines whether or not the external telephone 22 is connected to the facsimile apparatus 1 based on the setting information from the operation display unit 12, and the external telephone 22 Is connected to the facsimile apparatus 1, the operation of the power control switch 31 is controlled by the power control signal D 4 synchronized with the relay control signal D 1, and when the external telephone 22 is not connected to the facsimile apparatus 1. A power control signal D4 that is always at a high level is sent to the power control switch 31. Thereby, when the external telephone 22 is connected to the facsimile apparatus 1, the power supply VCC1 is supplied to the external telephone detection circuit 18 while the external telephone 22 is disconnected from the public line 20, and the external telephone 22 is disconnected. While the attached telephone 22 is connected to the public line 20, the power supply to the external telephone detection circuit 18 is cut off. On the other hand, when the external telephone 22 is not connected to the facsimile apparatus 1, the state where the power supply to the telephone detection circuit 18 is cut off is maintained.

  Similarly to the third embodiment, the third power control switch 33 starts supplying the power supply VCC3 to the pseudo ringing circuit 24 when the pseudo ringing signal D5 is sent from the line control device 17, and the line control device 17 When the pseudo sound control signal D5 from is stopped, the power supply VCC3 to the pseudo sound circuit 24 is cut off.

  As described above, in the fifth embodiment, the power supply to the external telephone detection circuit 18 is controlled in the same manner as in the fourth embodiment, and the power supply to the pseudo ringing circuit 24 is controlled in the same manner as in the third embodiment. Therefore, useless power consumption can be significantly reduced.

  Each of the embodiments described above is a specific application example of the present invention, and the technical scope of the present invention is not limited to the technical matters disclosed as the embodiments. The technical scope of the present invention includes modifications, alternative means, and the like that are easily derived by adding technical common sense to the technical matters disclosed as examples.

1 Facsimile machine 12 Operation display section (setting information input means)
16 Line controller board 17 Line control device (line control means)
18 External phone detection circuit 18a Off-hook detection circuit (off-hook detection means)
18b Dial detection circuit (dial detection means)
20 Public line 21 Mechanical switch (switching means)
22 External telephone 24 Pseudo ringing circuit (pseudo ringing means)
31 Power control switch (first power control means)
32 Second power control switch (second power control means)
33 Third power control switch (third power control means)

Japanese Patent No. 3661217

Claims (6)

In a facsimile machine that can be connected to an external telephone,
Switching means for switching connection / disconnection between the external telephone and the public line;
Off-hook detection means for detecting an off-hook state of the external telephone connected to the external telephone when the external telephone is disconnected from a public line;
When an off-hook state is detected by the off-hook detection means, or when the external telephone is connected to a public line when a call signal to the external telephone is received, and the external telephone enters an on-hook state Line control means for controlling the operation of the switching means to disconnect the external telephone from the public line;
Power is supplied to the off-hook detection means while the external telephone is disconnected from the public line, and power supply to the off-hook detection means is cut off while the external telephone is connected to the public line. And a power supply control means. Dial detection means for detecting a dial operation of the external telephone connected to the external telephone when the external telephone is disconnected from a public line;
Second power control for starting power supply to the dial detection means when an off-hook state is detected by the off-hook detection means, and shutting off power supply to the dial detection means when the external telephone is on-hooked The facsimile apparatus according to claim 1, further comprising: means. Dial detecting means connected to the external telephone when the external telephone is disconnected from a public line and detecting a dial operation of the external telephone;
The first power control means supplies power to the off-hook detection means and the dial detection means while the external telephone is disconnected from the public line, and the external telephone is connected to the public line. 2. The facsimile apparatus according to claim 1, wherein power supply to the off-hook detecting means and the dial detecting means is interrupted during the interval. When the external telephone is disconnected from the public line, it is connected to the external telephone, and when the call signal to the external telephone is received by the line control means, the pseudo Ringing means,
When the line control means receives a call signal to the external telephone, power supply to the pseudo-sounding means is started, and when the external telephone enters an off-hook state, or the external telephone is simulated. 4. The facsimile apparatus according to claim 1, further comprising: a third power supply control unit that cuts off power supply to the pseudo sounding unit when the operation is continued for a predetermined time. . Further comprising setting information input means for receiving input of setting information indicating that the external telephone is connected to a facsimile machine;
When the setting information is input, the first power control means supplies power to the off-hook detection means while the external telephone is disconnected from the public line, and the external telephone While being connected to a public line, the power supply to the off-hook detection unit is cut off, and when the setting information is not input, the state where the power supply to the off-hook detection unit is cut off is maintained. The facsimile apparatus according to claim 1, wherein the facsimile apparatus is characterized. A switching means for switching connection / disconnection between the external telephone and the public line;
Off-hook detection means for detecting an off-hook state of the external telephone connected to the external telephone when the external telephone is disconnected from a public line;
When an off-hook state is detected by the off-hook detection means, or when the external telephone is connected to a public line when a call signal to the external telephone is received, and the external telephone enters an on-hook state A line control means for controlling the operation of the switching means so as to disconnect the external telephone from a public line, and a power control method for a facsimile apparatus comprising:
Power is supplied to the off-hook detection means while the external telephone is disconnected from the public line, and power supply to the off-hook detection means is interrupted while the external telephone is connected to the public line. A power supply control method for a facsimile machine.

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