KR100269661B1 - Drive device for saving thermal transfer ribbon - Google Patents

Abstract

PURPOSE: A power transmission device for saving a thermal transfer ribbon is provided to reduce the waste of a thermal transfer ribbon by limiting a transferring process of the thermal transfer ribbon. CONSTITUTION: A driving motor(10) is fixed to a lower frame. A driving gear(11) is installed at a rotary shaft. A driving gear portion(12-14) is combined with the driving gear(11). A sun gear(21) is combined with the driving gear portion(12-14). A planetary gear(22) is combined with the sun gear(21). A bracket(23) is combined with the sun gear(21) and the planetary gear(22). A swing gear(20) is formed with the sun gear(21), the planetary gear(22), and the bracket(23). A paper supply gear portion(40-42) transmits power to a TPH(Thermal Print Head) gear(43), a badge gear(45), and a winding gear(47). A back feeding portion(60) transmits the power to the wiring gear(45). A control portion controls the driving motor(10) and the back feeding portion(60).

Description

Power train for saving thermal transfer ribbon

The present invention relates to a power transmission device for reducing the unnecessary consumption of the thermal transfer ribbon used for plain paper facsimile, more specifically, a section in which the thermal transfer ribbon is not used, that is, the tip of the recording paper in the pickup roller TPH ( And a power transmission device capable of reducing unnecessary consumption of the thermal transfer ribbon during the section up to the thermal print head) and the section of the recording paper passing through the TPH and completely discharged by the discharge roller.

In general, a facsimile is a device that electrically transmits and receives texts, pictures, and photographs on a paper, and includes a transmission unit including a CIS (Contact Image Sensor) that recognizes the contents of the document and a CIS roller that transfers the document to the CIS. It is divided into a receiving unit consisting of a platen roller for receiving the electrical signal received from the outside and printing it on the recording paper (TPH) and a platen roller for conveying the recording paper to the TPH.

On the other hand, such a facsimile is generally classified into a method of using a specially processed roll-type thermal recording paper and a method of printing data using a general paper and a thermal transfer ribbon.

As shown in FIG. 1, the plain paper used in this method is configured such that the plain paper contained in the paper feed cassette 51 passes through the TPH 53 by the pickup roller 36 and the platen roller 44. At this time, the thermal transfer ribbon 56 is interposed between the TPH 53 and the general paper, and the data is printed on the recording paper while being transferred together with the recording paper.

To this end, the gear trains 80 to 91 engaged with each other to be interlocked by the drive motor 92 are installed in the frame not shown in the drawing, and the gear trains 80 to 91 are installed in the facsimile machine. The pickup roller 36, the platen roller 44, and the pickup gear 35 at the shaft end of the discharge roller 46 and the TPH gear 43 and the discharge gear 45 are engaged with each other and are interlocked at a constant rotation ratio. The winding gears 47 of the shaft end of the winding reel 57 are engaged with one gear train 80-91 so as to be interlocked by a fixed rotation ratio.

Therefore, when the drive motor 92 is rotated, the pick-up roller 36 engaged with the paper feed cassette 51, the platen roller 44 engaged with the TPH 53, and the discharge roller provided at the recording paper discharge port. At the same time, the winding reel 57 for conveying the 46 and the above-mentioned thermal transfer ribbon 56 rotates both the recording paper and the thermal transfer ribbon.

Therefore, in the conventional receiver power transmission device, the recording paper contained in the paper feed cassette 51, that is, a section irrelevant to printing the received data on the recording paper, is transferred to the TPH 53 through the pickup roller 36. The take-up gear 47 rotates together during the transfer section until it is sent to and the transfer section until the end of the recording paper passes through the TPH 53 and is completely discharged by the discharge roller 46. By transferring the unused thermal transfer ribbon 56, unnecessary waste of the thermal transfer ribbon 56 is generated.

Therefore, the present invention has been devised to solve such a conventional problem, and the main object of the present invention is as described above, the transfer section irrelevant to data printing, that is, the section from the pick-up roller to the TPH. During the transfer of the recording paper, and at the same time, the thermal transfer ribbon, which is not used while the end of the recording paper is completely discharged by the discharge roller, is configured to be back-feeded when the next recording paper is loaded. It is to provide a receiver power transmission device that can reduce the unnecessary consumption of ribbon.

1 is a main configuration diagram showing a receiving unit power transmission device of a conventional plain paper facsimile,

2 is an exploded perspective view of a power transmission device according to the present invention;

Figure 3a is a main configuration showing the state when the power transmission device according to the invention backfeeding the thermal transfer ribbon of the margin while feeding only the paper,

Figure 3b is a main part configuration showing the state when the power transmission device according to the present invention to transfer the recording paper and the thermal transfer ribbon at the same time,

4 is a floor chart showing an operation procedure of the control means according to the present invention.

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

10: drive motor 11: drive gear

12 ~ 14: Drive gear train 20: Swing gear

21: sun gear 22: planetary gear

23: bracket 31 ~ 34: feed gear row

35: pickup gear 36: pickup roller

37: shaft end 40 ~ 42: feed gear train

43: TPH gear 44: platen roller

45: discharge gear 46: discharge roller

47: winding gear 48: winding gear

51: paper feed cassette 52: first sensor

53: TPH 54: second sensor

56: thermal transfer ribbon 57: winding reel

58: winding reel 60: back feeding means

61: lever 62: hinge

63: solenoid 64: rod

68: middle gear 70: lower frame

71: auxiliary frame 73: upper frame

80 ~ 91: Gear train 92: Drive motor

93: drive gear

The construction means for achieving the object of the present invention, the upper, lower and auxiliary frames forming the skeleton of the built-in components, the TPH for printing data in accordance with the received signal, the pickup roller for feeding the recording paper, the TPH A platen roller which is rotated in close contact, a discharge roller for discharging printed recording paper, and a pickup gear, a TPH gear, and a discharge gear at each end of each roller, and a winding reel, a winding reel, and a thermal transfer ribbon, respectively. In a fax comprising a winding gear and a winding gear of the winding reel and the winding reel shaft end,

A drive motor fixed to the lower frame and provided with a drive gear at a rotation shaft end to perform forward and reverse rotation;

A drive gear train engaged with the drive gear to transmit power;

The bearing is installed in the lower frame and the sun gear is rotated in engagement with the drive gear train, the planetary gear is engaged with the sun gear in parallel with the rotational movement and the constant trajectory movement, and the bearing is rotated by engaging the sun gear and the planetary gear in one side. A swing gear consisting of a bracket for engaging;

A feed gear train selectively linked with the swing gear to transfer power to the pickup gear;

A transfer gear train selectively linked with the swing gear to transfer power to the TPH gear, the discharge gear and the take-up gear, respectively;

Back feeding means for transmitting power so that the winding gear is reversely rotated while power is transmitted to the feed gear train;

It characterized in that it comprises a control means for controlling the drive motor and the back feeding means.

As a preferred embodiment of the present invention by the above configuration, the control means is provided in the recording paper transport path before the TPH installation unit, the first sensor to be operated by the recording paper to be transported; A second sensor installed in the discharge path of the recording paper before the discharge roller and operated by the discharged recording paper; It consists of a microprocessor for controlling the drive motor and the back feeding means as previously input based on the electrical signals received from the first sensor and the second sensor,

The back feeding means includes: an intermediate gear for selectively engaging the feed gear train and transmitting power to a winding gear; A lever which pivotally couples the intermediate gear to one end portion, and a member center portion is hinged to the lower frame; It is fixed to the lower frame, the hinge is coupled to the opposite end of the lever consists of a solenoid controlled by the control means.

According to the above configuration, when the microprocessor detects the image data and the facsimile tone signal, the driving motor is rotated forward clockwise to transfer power to the feed gear train by the swing gear, thereby transferring only the recording paper. At the same time, the solenoid is retracted to reversely rotate the winding reel by the intermediate gear, thereby backfeeding the thermal transfer ribbon of the unused margins to a certain length.

Subsequently, when the recording paper is transported and the first sensor is operated, the microprocessor extends the solenoid to separate the intermediate gear from the winding gear at a predetermined distance to block backfeeding power transfer, and then the drive after the predetermined step has elapsed. By rotating the motor in reverse, power is transmitted to the feed gear train by the swing gear, and the platen roller, the discharge roller, and the winding reel are simultaneously linked to transfer the thermal transfer ribbon and the recording paper together, thereby printing the data received on the recording paper. do.

Subsequently, when the end of the recording paper passes completely over the second sensor, the microprocessor contracts the solenoid again after a certain step has elapsed, thereby connecting the intermediate gear between the feed gear train and the winding gear, and at the same time, resetting the driving motor. By rotating, the swing gear is engaged with the feed gear train to feed the next recording paper or is in a standby state when no image data is received.

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

Figure 2 is an exploded perspective view of the power transmission device according to the present invention, reference numeral 10 is a drive motor, 20 is a feed gear train 31 and 34 and a transfer gear train 40 while rotating and trajectory motion in parallel The swing gear selectively transmits power to ˜42, and 60 is a back feeding means for selectively powering the feed gear trains 31 to 34 to transfer power to the winding gear 48. In addition, reference numerals 52 and 54 are first and second sensors for controlling the power train.

The drive motor 10 is configured to be supplied with power through a motor driving part controlled by a built-in microprocessor, and a step motor that can be used to relatively rotate forward and backward in a relatively precise manner. The drive motor 10 is installed inside the lower frame 70 and installs a drive gear 11 at its shaft end to transfer power to drive gear trains 12 to 14 engaged with the sun gear 21 to be described later. It is configured to give.

The swing gear 20 is a sun gear 21 meshed with the above-described drive gear trains 12 to 14, and a planetary gear 22 meshing with the sun gear 21 to perform rotational and trajectory motions. The sun gear 21 and the planetary gear 22 is composed of a bracket 23 for holding the bearing on one side of the member. In addition, the swing gear 20 may selectively transmit power to feed gear trains 31 to 34 or transfer gear trains 40 to 42 which will be described later according to the rotation direction of the driving motor 10. The bearing is installed in the lower frame 80 so that it can be.

The feed gear trains 31 to 34 are supported by the swing gear 20 to be selectively supported by the swing gear 20 so that the bearings are installed in the lower frame 70 so as to transfer power to the pickup gear 35. It is a gear train.

The transfer gear trains 40 to 42 receive power selectively by the swing gear 20 to transfer power to the TPH gear 43, the discharge gear 45, and the winding gear 47. It is a gear group installed in the lower frame 70 so that the bearing.

The back feeding means 60 has a lever 61 coupled to the lower frame 70 by a central portion of the lower frame 70 and a hinge coupled to one end of the lever 61 fixedly installed at the lower frame 70. The bearing is coupled to the solenoid 63 and the other end of the lever 61, and is engaged between the feed gear trains 31 to 34 and the winding gear 48 according to the operation of the solenoid 63. Intermediate gear 68 for transmitting the, and the first sensor 52 and the second sensor 54 of Figure 3a for controlling the solenoid (63) and the built-in microprocessor.

As a control means, the motor according to the input previously based on the first sensor 52 and the second sensor 54 operated by the conveyed recording paper, and the electrical signals of the sensors 52, 54, It consists of a microprocessor that controls the driver and solenoid driver. At this time, the first sensor 52 is installed on the transport path just before the TPH 53 installation part, and the second sensor 54 is installed on the discharge path just before the discharge roller 46. .

Referring to Figure 4 with respect to the operation of the apparatus according to an embodiment of the present invention by the above configuration as follows.

First, when the microprocessor embedded in the facsimile (ST 1 stage) in the standby state senses the image data and the facsimile tone signal (ST 2 stage), as shown in FIG. 3A, the driving motor 10 is turned clockwise. Forward rotation. Therefore, the swing gear 20 is engaged with the feed gear trains 31 to 34 while performing a constant trajectory movement to transfer only the recording paper by the pickup roller 36.

In this case, the solenoid 63 is in a contracted state, and the intermediate gear 68 is engaged between the feed gear trains 31 to 34 and the winding gear 48 to feed gear trains 31 to 34. By transmitting the power of 34 to the winding gear 48, the unused and transferred thermal transfer ribbon is back fed back to the winding reel 58 (ST step 3).

Subsequently, when the recording paper is transported by the pickup roller 36 to operate the first sensor 52 to transmit an electrical signal to the built-in microprocessor (ST step 4), as shown in FIG. 3B. Likewise, the microprocessor extends the solenoid 63, and thus the intermediate gear 68 is spaced apart from the feed gear trains 31 to 34 and the winding gear 48 for backfeeding. It cuts off power transmission.

On the other hand, the microprocessor that receives the electrical signal from the first sensor 52 is a constant step (step until the end of the recording paper is engaged with the platen roller 44 from the first sensor 52 described above) After the elapse of time, the motor driving unit is controlled to rotate the driving motor 10 in reverse. Accordingly, the swing gear 20 is engaged with the feed gear train 40 to 42 while performing a constant trajectory movement to transfer power to the platen roller 44, the discharge roller 46, and the reel 57. By zooming in, the received data is printed on the recording paper while simultaneously transferring the thermal transfer ribbon and the recording paper (ST step 5).

Subsequently, when the end of the recording paper passes completely over the second sensor 54, as shown in FIG. 3A, the microprocessor is completely passed while the second sensor 54 is pressed by the recording paper and released. The motor driver and the solenoid driver after a predetermined step (step until the paper is completely discharged after passing through the second sensor 54) At the same time, the drive motor 10 is rotated forward again, and the solenoid 63 is contracted again (ST 8 step). At this time, the microprocessor determines whether there is received data (step ST 9), and if data remains, the microprocessor repeatedly prints the data while repeating the above steps ST 4 to ST 9.

At this time, when all data received from the outside is output and there is no image data, the reception is terminated. The swing gear 20 is engaged with the feed gear trains 31 to 34 to be in a standby state. The intermediate gear 68 of one of the back feeding means is engaged between the feed gear trains 31 to 34 and the winding gear 48 to be in a standby state (ST 10 step).

As can be seen from the above, the power transmission device according to the present invention limits the transfer of the thermal transfer ribbon during the transfer section irrelevant to the above-described data printing, and also allows the thermal transfer ribbon transferred to the margin to be back fed again. As a result, unnecessary waste of the thermal transfer ribbon can be reduced.

Claims (3)

Upper and lower and auxiliary frames 73, 70 and 71 which form a skeleton of embedded parts, a TPH 53 which prints data according to the received signal, a pickup roller 36 which feeds recording paper, The platen roller 44 which is rotated in close contact with the TPH 53, the discharge roller 46 for discharging the printed recording paper, and the pickup gear 35 at one end of each of the rollers 36, 44, 46. And winding reel 58 and winding reel 57 and winding reel 58 and winding reel 57 having TPH gear 43 and discharge gear 45, respectively, in which thermal transfer ribbon 56 is wound. In the facsimile comprising the winding gear 48 and the winding gear 47 of the shaft end, A drive motor (10) fixed to the lower frame (70) and provided with a drive gear (11) at the end of the rotation shaft for forward and reverse rotation; Drive gear trains 12 to 14 engaged with the drive gears 11 to transmit power; The bearing is installed on the lower frame 70, the sun gear 21 is rotated in engagement with the drive gear train (12) ~ (14), and the planetary planet is engaged in rotational motion and constant trajectory motion by engaging the sun gear (21) A swing gear 20 composed of a gear 22 and a bracket 23 bearing the sun gear 21 and the planetary gear 22 together to rotate in engagement with one side; A feed gear train (31) to (34) which selectively connects with the swing gear (20) and transmits power to the pickup gear (35); Transfer gear trains (40) to (42), which are selectively interlocked by the swing gear (20) and transmit power to the TPH gear (43), the discharge gear (45) and the take-up gear (47), respectively; A back feeding means (60) for transmitting power so that the winding gear (48) is reversely rotated while power is transmitted to the feed gear trains (31) to (34); Power transmission device for thermal transfer ribbon saving, characterized in that consisting of a control means for controlling the drive motor (10) and the back feeding means (60). 2. The control apparatus according to claim 1, wherein the control means comprises: a first sensor (52) installed in a recording paper conveying path before the TPH (53) installation unit and operated by the recording paper being conveyed; A second sensor (54) installed in the recording paper discharge path before the discharge roller (46) and operated by the recording paper discharged; It is composed of a microprocessor for controlling the drive motor 10 and the back feeding means 60 as previously input based on the electrical signals received from the first sensor 52 and the second sensor 54 A power train for saving thermal ribbon. The method according to claim 1, wherein the back feeding means (60) comprises: an intermediate gear (68) for selectively powering the feed gear trains (31) to (34) to transfer power to the winding gear (48); A lever (61) hingedly coupled to the intermediate frame (68) on one end of the bearing, and the center portion of the member hinged to the lower frame (70); The solenoid 63 is fixed to the lower frame 70, hinged to the opposite end of the lever 61 is controlled by the control means, characterized in that it comprises a power transfer for saving the thermal transfer ribbon Device.

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