KR19990009928A - Fax drive - Google Patents

Abstract

The present invention relates to a facsimile drive device capable of transmitting, receiving or copying a single motor. The present invention relates to a facsimile drive device capable of operating both a facsimile reading device and an output device as one step motor. The purpose is to provide. According to the present invention, a motor is rotated counterclockwise according to a signal sensed by a microcomputer circuit embedded in a facsimile, a signal according to a user's operation, or a signal transmitted from a transmitting side, and a mode switching gear for output and reading by a cam. Initialization mode is performed by allowing one or both to selectively engage the output and read gear group or both, and subsequently, when the motor rotates clockwise by the control of the microcomputer, the power of the sun gear switches to the output and read mode. By selectively connecting to one or both of the gears, it is configured to selectively transmit, receive or copy as one motor.

Description

Fax drive

The present invention relates to a driving device for driving a facsimile contact sensor (CIS) roller and a thermal print head (TPH) roller, and more particularly, selectively receives, transmits, and copies a single motor. It relates to a drive of the facsimile that can be.

In general, a facsimile machine includes a document reading device and a reception data output device. The reading device includes a contact image sensor (CIS) for reading the contents of the document, and the output device charges the toner to the drum and a thermal print head which outputs a data signal received from the other party to a thermal paper. There is a way to output to plain paper. In the CIS, a set of CIS rollers for transferring the originals is installed, and in the TPH, a set of TPH rollers for transferring the recording paper is installed.

If you want to send originals, place the originals on the facsimile table and start sending them. When the document is rotated by the drive motor, the Auto Document Feeding (ADF) roller and the CIS roller are rotated together, keeping the originals in close contact with the CIS surface. The content of the original is scanned by the CIS by transferring it to the. In addition, during reception, the driving motor is rotated by the signal received from the other party, and the corresponding information is printed on the surface of the recording paper or general paper through the output device as described above.

On the other hand, in the copy mode of the facsimile, the CIS drive motor and the output drive motor are driven at the same time, and the contents of the original placed on the mounting table are read by the CIS and printed out on the recording paper or general paper by the output device. Discharge. Most conventional facsimile machines such as these are provided with driving motors for driving the reading device and the output device, respectively.

As can be seen from the above, the conventional facsimile machine having the drive motor for each reading device and the output device has to be installed with bulky and expensive motors so that the utilization space inside the facsimile becomes narrow, which constrains the configuration and layout design. As a result, the volume of the product increased, and the production cost of the product increased.

In an effort to solve such a problem, a facsimile that can operate both a reading device and an output device through a single drive motor has been developed. For example, it is disclosed in detail in Korean Patent Application No. 91-10765 (Facsimile image transmission and reception device, Publication No. 93-1664).

However, the facsimile driving device that operates the read and output device using one motor according to the above source takes a long time to convert to a setting mode such as a transmission, reception, and copy mode, so that the user waits a lot of time, so it is difficult to actually employ it. There is this. This is because the reading time and the output device are installed symmetrically on the surface of one feed roller so that the power can be scanned by the driving force of the feed roller, or the thermal printing on the recording paper takes a long time. .

Therefore, an improved facsimile drive device capable of operating both the reading device and the output device through one drive motor to solve the above-mentioned problems is described in Japanese Patent No. 4-179214 (filed June 6, 1992) and Japan. It is disclosed in detail in Korean Patent No. 5-30088 (filed date Feb. 19, 1993).

However, according to the technical configuration of the above source, it adopts the method using solenoid valve and swing gear to selectively switch the transmission, reception, and copying modes. It is designed to implement the facsimile functions, namely transmit, receive and copy functions, but there is little effectiveness in reducing its volume and weight. As a result, in the process of developing the functions of the facsimile two motors to operate as one motor, other components accompanying them have not been overcome to overcome the spatial design constraint, and the production cost increases due to the use of additional components. Its effectiveness is low.

The present invention has been devised to solve the above-mentioned problems. The main object of the present invention is structurally simple in selectively performing transmission, reception and copy functions with one motor, and mode switching is easy. To provide a very fast facsimile drive.

Another object of the present invention is to provide a facsimile that is smaller in size, lighter in weight, and less expensive by securing a wider space inside the facsimile.

1 is a perspective view of a main part of a facsimile showing a state of driving an output device and a reading device through one motor according to the present invention;

Figure 2a is an exploded perspective view of the main portion showing a state in which power is transmitted according to the rotation direction of the motor according to the present invention;

Figure 2b is a plan view of the main portion showing a state in which the motor is coupled according to the invention

3 is a side view illustrating a main part of a slot for guiding a movement path of a mode shift gear according to the present invention;

Figure 4 is a sectional view of the main part of the facsimile showing an example of adoption of the facsimile drive device according to the present invention;

5A is a side view of a main part of a fax illustrating a transmission mode switching state according to the driving device of the fax of the present invention;

Fig. 5B is a side view of a main part of a fax illustrating a transmission mode state according to the drive of the fax of the present invention;

6A is a side view illustrating main parts of a fax illustrating a reception mode switching state according to a driving device of the fax of the present invention;

6B is a side view illustrating main parts of a fax illustrating a reception mode state according to a driving device of the fax of the present invention;

7A is a side view of a main part of a facsimile illustrating a copy mode switching state according to a drive of the facsimile of the present invention;

Fig. 7B is a side view of the main part of the facsimile illustrating the copy mode state according to the drive of the facsimile of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

1: frame 2: small diameter slot

3: large diameter slot 5: through-hole

7: bearing ball 9: cover

10: Reading device 11: CIS

13: CIS roller 20: Output device

21: TPH 23: TPH

31 to 37: gear group for reading device 41 to 46: gear group for output device

50: power distribution means 60, 70: mode shift gear

61, 71: mode switching lever 80: cam

80a: protrusion 81: extension shaft

83a: first friction clutch spring 83b: second friction clutch spring

84: pulley M: step motor

M1: Sun Gear CS: Tensile Spring

SS1 to SS4: Micro Switch

The construction means of the present invention for achieving the above object, in the facsimile, the inner frame for supporting the parts,

An output device and a reading device rotatably installed on the frame;

An output gear group and a read gear group rotatably coupled to a side of the frame to drive the output device and the read device according to selection signals of transmission, reception and copy modes;

Fixed to the frame, placed in a ready state to perform the above modes when none of the transmit, receive or copy modes are selected, and when any of the transmit, receive and copy modes is selected, Driven by a microcomputer operating according to the circuit logic can be achieved as a power distribution means for transmitting power to either or both of the output gear group and the reading gear group.

According to the present invention, the time required for switching the facsimile function, that is, the transmission function, the reception function, and the copy function according to the rotational direction of the motor is very short, so that the user can quickly switch to the specific mode selected by the user and wait for the mode change. There is very little, which allows for faster use of the facsimile. In addition, the structure is much simplified compared to the conventional one-motor drive facsimile it is possible to secure more design space, and to provide the effect that the weight and size of the product can be more easily implemented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 exemplarily illustrates a gear group for driving a reading device and an output device installed in the facsimile of the facsimile, ie, the facsimile according to the present invention.

In the drawing, reference numeral 1 is an internal frame to which various components constituting the facsimile is mounted, 10 is a reading device (CIS) which scans the contents of the document during the transmission operation of the facsimile, and 20 is a transmission from the counterpart during the reception operation of the fax. Output device to output the data. In the present specification, the output device 20 exemplifies and illustrates a facsimile employing a thermosensitive recording method (TPH) for printing by applying heat to a thermosensitive recording paper.

As shown in FIG. 1, the facsimile driving device according to the present invention includes a frame 1, a reading device 10, an output device 20, a gear group 31 to 36 for a reading device, and a gear group for the output device. And a power distribution means 50 for selectively distributing the power to the reading device gear groups 31 to 36 or the output device gear groups 41 to 46 according to the mode state.

1 and 4 is a device for reading the contents of the document placed on the document placement target, as shown in Figs. 1 and 4, the micro switch (SS1) for detecting whether the document is placed on the document holder, and the document The CIS 11 and the CIS roller 13 and the ADF roller 15 for scanning the contents of the mean. Of course, the user performs the above operation by the operation of the transmission button arranged on the operation panel (not shown).

The output device 20 is a device for printing and outputting data received from a counterpart on a recording sheet. In the present specification, the output device 20 refers to a TPH 21 and a TPH roller 23 which are commonly used in a facsimile. The output device 20 is itself operated by logic in which the facsimile is programmatically programmed into the main printed circuit board by the received signal.

The gear groups 31 to 36 for the reading apparatus 10 are gear groups for operating the above-described CIS roller 13 and the ADF roller 15 while being rotated by the rotational force of the step motor M capable of forward and reverse rotation. The gear groups are rotatably coupled to the side wall of the frame 1. Looking at the arrangement of the gear group for the reading device 10 is as follows.

The gear groups 31 to 36 for the reading device 10 are constituted by a plurality of spur gears as shown in Figs. 1 and 4, and are rotatably supported on the wall surface of the frame 1. These spur gears have different diameters, which take into account the rotational speed and direction of rotation of the CIS roller 13 and the ADF roller 15 to which power is finally transmitted, and the number does not have a significant meaning. The gear groups 31 to 36 for the reading device 10 are first powered by the reference numeral 35 among the gear groups 31 to 36 and are transmitted to the gears coupled to the ends of the CIS rollers 13 so that the CIS rollers 13 And rotate the ADF roller 15. Of course, when the CIS roller 13 rotates, the document is read by the CIS 11 while the document passes through the surface of the CIS 11. The spur gear is selectively connected to the power distribution means 50 to be described later to be engaged with or separated from any one or both of the read mode switching gears 60 and 70 so that the power is transmitted or the power is cut off.

The gear groups 41 to 46 for the output device 20 are also rotated by the rotational force of the step motor M described above, and serve to transmit the power to the output device 20. These gear groups 41 to 46 are pivotally coupled to the side wall of the frame 1 as described above. Looking at the arrangement of the gear group 41 to 46 for the output device 20 is as follows.

The gear groups 41 to 46 for the output device 20 are also composed of a plurality of spur gears, as shown in FIG. 4, which sprockets are rotatably coupled to the side wall of the frame 1. In addition, as described above, the gear groups for the output device 20 are designed in consideration of the rotational speed and the rotational direction of the TPH roller 23 at which power is finally reached, and the number thereof is also not significant. The gear groups 41 to 46 for the output device 20 are first powered by the reference numeral 46 of the gears and are transmitted to the gear coupled to the end of the TPH roller to rotate the TPH roller. The spur gear is selectively connected to the power distribution means 50 to be described later to be engaged with or separated from any one or all of the mode switching gears 60 and 70 for output so that the power is transmitted or the power is cut off. In addition, the above-described gear group 31 to 36 for the reading device 10 and the gear group 41 to 46 for the output device 20 are spaced apart from each other in a space so that interference does not occur on the wall surface of the frame 1. It is installed.

The power distribution means 50 selectively supplies rotational force to the gear groups 31 to 36 for the reading device 10 or the gear groups 41 to 46 for the output device 20 to read the power 10. Alternatively, the output device 20 may be operated or both the reading device 10 and the output device 20 may be operated simultaneously. In addition, the power distribution unit 50 is initialized to promptly process a function to be subsequently performed when one of the above functions is not performed, or when one of the above functions is not performed. Perform the mode.

As shown in FIG. 2B and FIG. 3, the configuration of the power distribution means 50 includes a hole 5 between the pair of small diameter slots 2 and the slots 2 at a predetermined distance from the wall surface. A frame (1) formed thereon;

A cover 9 attached to the frame 1 at a predetermined distance, and having a bearing hole 7 formed between the pair of large diameter slots 3 and the large diameter slots 3;

A step motor (M) having a rotor composed of a small diameter shaft and a large diameter shaft inserted into the through hole 5 and controlled by a microcomputer;

A cam (80) coupled to an end of the rotor and having an extension shaft (81) extending in an axial direction with protrusions on one surface thereof;

A first friction clutch spring (83a) through which the small diameter shaft rotor penetrates, one end of which is coupled to the large diameter rotor, and the other end of which is coupled to the extension shaft (81) of the cam (80);

One end is coupled to a pulley coupled to a small diameter rotor passing through the extension shaft 81 of the cam 80, the other end is coupled to the sun gear (M1) rotatably coupled to the bearing hole (7) A second friction clutch spring 83b;

One end is inserted into the small diameter slot (2), the other end is freely coupled to the large diameter slot (3), the gear group 31 for the sun gear (M1) and the output device 20 on the circumferential surface A pair of mode switching levers 61, each of which has outputs and reading mode switching gears 60, 70 disposed adjacently between the gear groups 41 to 46 and the reading device 10, respectively. 71) and:

A sensor coupled to the frame 1 and connected to the projection 80a when the cam 80 rotates to electrically transmit an on / off signal to the microcomputer to control driving of the step motor M from the microcomputer. Wow

The pair of output and read mode switching gears (60, 70) is implemented as an elastic means for maintaining the return to the sun gear (M1).

This will be described in more detail as follows. As shown in FIGS. 2A and 3, the motor is attached to the side of the flame, and the rotor for transmitting the driving force is composed of small diameter and large diameter rotors R1 and R2. The small diameter rotor R1 has a predetermined length and is rotated together with the large diameter rotor R2.

One end of the first friction clutch spring 83a is coupled to the large diameter rotor, and the other end of the first friction clutch spring 83a is coupled to the extension shaft 81 of the cam 80. The first friction clutch spring 83a does not rotate or rotate the cam 80 according to the rotation direction of the motor. In other words, when the diameter of the first friction clutch spring 83a is rotated in the tightening direction, the cam 80 is rotated, and in the opposite case, the cam 80 is not rotated. The cam is assembled to penetrate into the extended shaft, and the pulley 84 is coupled to the protruding end. In this case, the surface where the cam 80 and the pulley 84 contact is slid.

A second friction clutch spring 83b is coupled to the pulley 84, and the other side of the second friction clutch spring 83b is an extension shaft of the sun gear rotatably coupled to the bearing hole 7 of the cover 9. Combined with The second friction clutch spring 83b functions to rotate or not rotate the sun gear M1 according to the rotation direction of the small diameter rotor R1. In other words, when the step motor M starts to be driven, only one of the cam 80 or the sun gear M1 is rotated according to the rotation directions of the rotors R1 and R2.

Around the sun gear M, a pair of mode switching gears 60, 70 are arranged to be freely arranged in the slots 2, 3 formed symmetrically on the frame 1 and the cover 9, respectively. The small diameter slot (2) has a flow range of the mode switching lever (61, 71) coupled to the frame so as to be smaller than the large diameter slot (3). This is to increase the clearance between the mode switching gears 60, 70 meshed with the sun gear M1 when the cam 80 is moved by the cam 80, thereby making it possible to more reliably transmit and block power. In addition, the large diameter slot 3 has the same radius of curvature as the curvature radius of the circumference of the output and reading spur gears 36 and 46 disposed adjacent to the frame 1. Accordingly, when the circumferential surfaces of the mode switching levers 61 and 71 are moved on the slots 3 by the rotation of the cam 80, the mode switching gears 60 and 70 output and read spur gears 35 and 46. It is always moved in mesh with each other, and the cam 80 makes it possible to separate from the sun gear M1. In FIGS. 1 to 7b, SS1 to SS4 are sensors, that is, micro switches, SS1 is a sensor for detecting the presence of a document for transmission, and SS2 is a sensor for detecting an initial state of a sun gear driving a read and output device. SS3 is a sensor that detects whether the document is jammed inside the facsimile during the process of discharging the document, and SS4 is a sensor that counts the number of sheets of the document discharged.

In addition, the elastic means is a tension spring (CS), as shown in Figure 1, both ends of the tension spring (CS) is coupled to the axis of the pair of mode switching lever (61, 71) described above, respectively. .

The operation relationship according to the embodiment of the facsimile driving device according to the present invention configured as described above will be described in sequence for each mode.

First, when power is supplied to the facsimile machine, the facsimile machine checks whether the paper is placed on the document discharge path by operating the micro switch (SS1) that detects the presence of various sensors, that is, whether the document is placed on the document table. The operation relation of the switch SS2, the reception of the reception signal, the selection of the copy function, and the like are checked to perform subsequent operations according to the program set in the microcomputer.

However, as described above, when there are no signals transmitted to the microcomputer, the microcomputer finally senses only the position state of the cam 80. If the position of the cam 80 is not reached at the correct position, that is, the cam When the projection 80a installed at 80 is spaced apart from the micro switch SS2 and the micro switch SS2 is turned off, the microcomputer is not shown in the drawing, but the step motor M is driven through the step motor M driving unit. Is driven counterclockwise.

Accordingly, when the step motor M rotates, the cam 80 coupled to the rotor of the step motor M rotates counterclockwise as shown in FIGS. 2B and 5A and 5B. 2, the inner diameter of the friction clutch spring 83a is rotated in the extending direction, and the inner diameter of the first friction clutch spring is rotated in the retracting direction, so that power is not transmitted to the sun gear M1, and only the cam 80 is rotated. Of course, if the rotational direction of the step motor is reversed, that is, clockwise rotation, the inner diameter of the second friction clutch spring 83a is retracted, and the inner diameter of the first friction clutch spring is expanded, so that power is not transmitted to the cam and the sun gear ( It is transmitted only to M1) to rotate the sun gear only. In this way, the cam 80 rotating in the counterclockwise direction is rotated until the protrusion 80a touches the micro switch SS2. When the protrusion 80a touches the micro switch SS2, the micro switch SS1 is rotated. The electronic signal is transferred to the microcomputer to immediately stop the step motor M through the step motor driver. In this case, while the cam 80 rotates, the mode switching levers 61 and 71 are moved outward by the cam surface, so that the mode switching gears 61 and 70 coupled to the mode switching lever are output and read spur gears. 35 and 46 move along the slot 3 in engagement with each other, so that the mode switching gears 60 and 70 are all separated from the sun gear M1.

Such a state is placed in a ready state for quickly performing a transmission function, a reception function, and a copy function performed by the fax.

Secondly, in the transmission mode of the facsimile, when the original to be transmitted is inserted into the document holder, the micro switch (SS1) is activated to indicate that the original is placed in the microcomputer and sent to the transmission mode by an electric signal. . In this case, as shown in FIGS. 6A and 6B, the microcomputer rotates the step motor M at a predetermined angle in the counterclockwise direction through the step motor controller so that the cam surface is the axis of the mode switching levers 61 and 71, that is, the output gear. The shafts of the mode switching levers 61 and 71 connected to the 35 and 46 are moved outward in the radial direction of the sun gear M1 so that the sun gear M1 and the mode switching gear 46 are separated. At this time, the mode switching gear 70 moves while overcoming the tensile force of the tension spring CS along the slot 3 formed on the frame 1 and the cover 9.

As described above, the mode switching gear 70 is separated from the sun gear M1 and the mode switching gear 60 is engaged with the sun gear M1. Pressing and transmitting the electric signal to the microcomputer at the same time as pressing the transmission start button to rotate the step motor (M) clockwise again through the step motor driver according to the programmed logic.

Therefore, when the step motor M rotates in the clockwise direction, power is not transmitted to the cam by the first friction clutch spring 83a, but power is transmitted to the sun gear by the second friction clutch spring 83b. Accordingly, the sun gear M1 rotates together with the small diameter rotor R1 to rotate the mode change gear 60. In this case, the pulley 84 and the sun gear M1 have a second friction clutch spring 83b as the step motor M rotates in a direction in which the inner diameter of the second friction clutch spring 83b connecting between them is retracted. By tightening the extension shaft of the sun gear M1 and the extension shaft of the cam 80 more strongly, the sun gear M1 and the small diameter rotor R1 rotate together. As a result, the mode shift gear 60 transmits power to the spur gear 35 to simultaneously drive the CIS roller 13 and the ADF roller 15 to feed the CIS to the CIS by the ADF roller. Read through

When the transmission mode is completed as described above, the micro switch SS1 detects whether or not the original is set on the mounting table, and if there is no original, the step motor M is stopped and the micro switch SS2 is positioned at the cam 80. Detects and delivers the signal to the microcomputer. If the projection 80a is not touched by the micro switch SS1, the microcomputer rotates the step motor M clockwise only in the counterclockwise direction as described above, and thus the first friction as described above. The cam is rotated through the clutch spring 83a to perform the initialization mode. Of course, in this case, the first friction clutch spring 83a transmits power to the cam 80 and the second friction clutch spring 83b does not transmit power to the sun gear M1.

Thirdly, when the facsimile is in the reception mode, the microcomputer automatically switches to the reception mode by the signal transmitted from the counterpart, so that the step motor M is counterclockwise as shown in FIGS. 7A and 7B. Operate as When the step motor M is rotated counterclockwise by a certain angle, the cam surface moves the axis of the mode shift lever 61 outward in the radial direction of the sun gear M1 so that the sun gear M1 and the mode shift gear 60 are rotated. To be separated.

As described above, the step motor M is clockwise rotated through the step motor driving unit according to the logic programmed in the microcomputer according to the signal transmitted from the device from the counterpart while the mode shift gear 60 is separated from the sun gear M1. Rotate

Therefore, when the step motor M rotates in the clockwise direction, the small diameter rotor R1 rotates the mode switching gear 70 while the sun gear M1 rotates together with the second friction clutch spring 83b. The mode change gear 70 rotates the spur gear 46 to rotate the TPH roller 23. Eventually, the received message content is converted into an electrical signal through a processing unit which is a circuit device, and the received message content is printed on the surface of the thermal recording paper interposed between the TPH 21 and the TPH roller 23 through the TPH 21. Will be discharged.

Fourthly, if you want to perform the copy function via facsimile, set the original to be copied on the document holder and press the copy function selection button arranged on the control panel.This signal signals that the recipient number will not be dialed. By rotating the step motor (M) by a counterclockwise direction at an angle as shown in Figure 8a to 8b through the step motor control unit by the cam surface is the axis of the two mode switching gear (60, 70) of the sun gear (M1) To interlock with. In this case, both of the mode switching gears 60 and 70 are engaged with the sun gear M1 by the tension spring CS, and at the same time, the microcomputer rotates the step motor M through the step motor driver.

Therefore, when the step motor (M) rotates in the clockwise direction and the sun gear (M1) with the cam 80 rotates to rotate both mode switching gear (60, 70) mode switching gear (60, 70) is a dock Power is supplied to the gear groups 31 to 36 and the gear groups 41 to 46 for output to drive the CIS roller 11, the ADF roller 15, and the TPH roller 23 at the same time for reading by the CIS 21. The data is sequentially printed on the surface of the recording paper through the TPH 21 through the data processing unit to discharge the recording paper.

In this way, the copy mode continues until there are no originals on the mounting table. Therefore, if there is no original on the document holder, the micro switch (SS1) detects that there is no original and transmits the signal to the microcomputer, and the microcomputer stops the step motor (M) through the step motor driver according to its own program. At the same time, it is checked through the micro switch SS2 whether the cam 80 is returned to its original position. If the position of the cam 80 is not returned to the original position, as described above by the microcomputer, the step motor M is rotated clockwise to rotate only the cam 80 to perform the initialization mode.

As can be seen from the above, the facsimile drive device according to the present invention has a mode change is very quick because the mode change is made by one rotation of the cam, so that the user has little inconvenience of waiting during the mode change when using the facsimile. This makes facsimile use easier.

In addition, since the power transmission relationship for transmitting, receiving, and copying functions is greatly simplified and the volume of the facsimile can be further reduced, it will be very advantageous for the manufacture of a lighter and smaller facsimile.

The drive device of the facsimile according to the present invention is described for illustrative purposes only, and those skilled in the art may implement various modifications and applications based on the present specification. Are intended to be included within the spirit and scope of the true meaning intended by the inventors and the claims defined below.

Claims (4)

In facsimile, An inner frame 1 supporting the parts, An output device 20 and a reading device 10 rotatably installed on the frame; Output gear groups 31 to 36 and docks rotatably coupled to the side of the frame 1 for driving the output device 20 and the read device 10 in accordance with selection signals of the transmission, reception and copy modes. Take-up gear group 41-46, Fixed to the frame 1, placed in a ready state to perform the above modes when none of the transmit, receive and copy modes have been selected, and any of the transmit, receive and copy modes may have been selected. At this time, the power is driven by a microcomputer operated according to the circuit logic to transfer power to one or both of the output gear groups 31 to 36 and the read gear groups 41 to 46, or both. A drive of the facsimile, characterized in that consisting of distribution means. The method of claim 1, wherein the power distribution means, The frame 1 having a pair of small diameter slots 2 and a through hole 5 formed between the slots 2 at a predetermined distance from the wall surface; A cover 9 attached to the frame 1 at a predetermined distance, and having a bearing hole 7 formed between the pair of large diameter slots 3 and the large diameter slots 3; A step motor (M) having a rotor composed of a small diameter shaft and a large diameter shaft inserted into the through hole 5 and controlled by a microcomputer; A cam 80 coupled to an end of the rotor, the cam 80 having an extension shaft 81 extending in an axial direction and having protrusions on one surface thereof; The small diameter shaft rotor is penetrated, one side end is coupled to the large diameter rotor, the other end is coupled to the first friction clutch spring (83a) coupled to the extension shaft 81 of the cam 80, One end is coupled to a pulley coupled to a small diameter rotor passing through the extension shaft 81 of the cam 80, the other end is coupled to the sun gear (M1) rotatably coupled to the bearing hole (7) The second friction clutch spring 83b, One end is inserted into the small diameter slot (2), the other end is freely coupled to the large diameter slot (3), the gear group 31 for the sun gear (M1) and the output device 20 on the circumferential surface A pair of mode switching levers 61, each of which has outputs and reading mode switching gears 60, 70 disposed adjacently between the gear groups 41 to 46 and the reading device 10, respectively. 71), A sensor coupled to the frame 1 and connected to the projection 80a when the cam 80 rotates to electrically transmit an on / off signal to the microcomputer to control driving of the step motor M from the microcomputer. Wow, The drive device of the facsimile, characterized in that the pair of output and read mode switching gears (60, 70) is composed of an elastic means for maintaining the return to the sun gear (M1). The drive device of a facsimile machine according to claim 1, wherein said elastic means is a tension spring (CS) whose both ends are respectively coupled to an axis of said mode switching gear (60, 70). The method according to claim 2, wherein the large diameter slot (3) is formed to have a radius of curvature equal to the radius of curvature of the circumferential surfaces of the output spur gear 35 and the read spur gear 46 disposed adjacent to each other. When the 61 and 71 move along the slot 3, the two mode switching gears 60 and 70 are moved in engagement with the output spur gear 36 and the read spur gear 46. Drive system.