KR100751595B1 - Printer Using Roll-type Transfer Medium - Google Patents

Abstract

By reducing the distance between the paper roll on which the recording paper is wound and the cutter for cutting the paper as much as possible, it is possible to accurately cut only the recording portion on the recording paper and to suppress the formation of blanks. A printer that minimizes sticking to unused ink ribbons. The printer of the present invention uses a recording paper wound in the form of a roll, wherein a recording paper is wound on a paper roll, the recording head prints on the recording paper, and the platen assembly is selective to the recording head. By adhering to the printing to facilitate the printing. A cutter assembly for cutting the recording paper on which printing is completed is provided on the recording paper path between the paper roll and the recording head. The printer preferably further includes a cam having a protruding rod attached to the outer circumferential surface thereof. The cutter assembly is provided with a first through hole having a first shape corresponding to the protruding rod, so that the cutting blade of the cutter assembly can be moved up and down by the protruding rod as the motor rotates. A second through hole having a second shape is formed in the platen assembly corresponding to the protruding bar, and the platen assembly can be moved up and down by the protruding bar as the motor rotates.

Printer, recording paper roll, paper roll, paper roll, cutter, platen

Description

Printer using roll-type recording medium {Printer Using Roll-type Transfer Medium}

1 is a perspective view of one embodiment of a printer according to the present invention;

2 is a cross-sectional view of the printer shown in FIG.

FIG. 3 shows the cutter assembly shown in FIG. 2. FIG.

4 is a cross-sectional view taken along the line A-A of the cutter assembly shown in FIG.

5A and 5B are views for explaining the protrusion bar operation when cutting the recording paper in the cutter assembly shown in FIG.

Figures 6a and 6b is a view for explaining the operation of the protrusion bar during the platen lifting up and down in the cutter assembly shown in FIG.

7 is a block diagram showing the electrical configuration of the printer shown in FIGS. 1 and 2;

8A to 8F are views for explaining the operation of the printer shown in Figs.

<Description of Symbols for Major Parts of Drawings>

2: housing, 4: cover, 5: hinge, 6: printer frame 10: ribbon cartridge

20: transfer paper roll, 22: transfer paper, 24: supply reel, 26: ink ribbon, 28: winding reel

30: rib, 32: slit, 34: crown piece, 36: idling gear

38: head receiving groove, 40: heat sink, 42: heat sink fins, 58: platen

70: discharge roller carrier, 72: discharge roller, 74: driven driven roller, 76: lever

78: recording paper outlet

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer apparatus, and more particularly, to a printer apparatus for printing onto a recording paper wound in a roll form.

A printer has been proposed that uses a recording paper wound in a roll form so that the recording paper cassette is unnecessary, thereby reducing the size and installation area of the printer itself and reducing the time required for feeding. For example, in the patent application No. 10-2005-0055078, the applicant has a transfer paper roll on which a transfer paper is wound, a supply reel on which an unused ink ribbon is wound, and a take-up reel on which an used ink ribbon is wound are all installed in one cartridge. I presented a printer. The printer described in the above patent application prints by transferring a plurality of colors of dye applied to the ink ribbon in a plane-sequential manner while repeating the unwinding and winding of the transfer paper wound on the transfer paper roll, and recovers the used ink ribbon and wound it on the winding reel. Meanwhile, the printed transfer paper portion is discharged through the discharge port, and at this time, the end of the transferred transfer paper is cut by the cutter.

By the way, in the printer as described above, if the transfer paper roll and the cutter is disposed with the thermal transfer head in between, the distance between the transfer paper roll and the cutter is far, unless a separate mechanism is employed to pull and cut the transfer paper tightly. It is difficult to set an accurate cutting point, and therefore, it is difficult to accurately cut only the recording portion on the transfer paper, that is, the end of the transfer paper on which printing has been completed, so that a margin of inevitably minute width may be formed. When the printed matter printed by the printer is a photograph taken by, for example, a digital camera, such a margin is a factor of degrading the quality of the photograph and lowering the user's satisfaction. On the other hand, in the above printer, a stake that may occur in the recording paper cutting process is stuck to the unused ink ribbon supplied from the supply reel in the next printing process by static electricity to prevent the dye from being transferred to the transfer paper. This may cause problems such as missing pixels.

The present invention is to solve such a problem, by reducing the distance between the paper roll on which the recording paper is wound and the cutter for cutting the paper as much as possible to accurately cut only the recording portion on the recording paper to suppress the formation of margins. In addition, the technical problem is to provide a printer that can minimize the phenomenon that the stake that can occur in the process of cutting the recording paper cling to the unused ink ribbon.

The present invention is suitable for use in a printer using a recording paper wound in a roll. The printer according to the present invention includes a paper roll, a recording head, a platen assembly, and a cutter assembly. The paper roll is wound on the recording paper, the recording head prints on the recording paper, and the platen assembly selectively adheres the recording paper to the recording head to facilitate printing. According to the present invention, a cutter assembly for cutting a printing sheet having completed printing is provided on a recording sheet path between the sheet roll and the recording head.

In a preferred embodiment, the printer further comprises a motor capable of forward and reverse rotation in a predetermined angle range, and a cam connected to the motor and having a protruding rod attached to an outer circumferential surface thereof. The cutter assembly is provided with a first through hole having a first shape corresponding to the protruding rod, so that the cutting blade of the cutter assembly can be moved up and down by the protruding rod as the motor rotates. In addition, the platen assembly also has a second through hole having a second shape corresponding to the protruding bar, so that the platen assembly can be elevated in the vertical direction by the protruding bar as the motor rotates.

In one embodiment, the first through-hole has a shape in which the second through-hole in the form of a straight line is connected to the first through-hole of the semi-circular shape, the second through-hole in the third through-hole of the semi-circular shape The fourth through portion is in a continuous shape. At this time, it is preferable that the first through part and the second through part are formed in directions opposite to each other.

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

1 shows an embodiment of a printer according to the present invention. The printer according to the present embodiment is a sublimation type thermal transfer printer, which has a housing (2) having a substantially cylindrical shape, a printer frame (6) installed and fixed inside the frame (2), and detachable within the frame (6). It is provided with a cartridge 10 that is installed. In a preferred embodiment, the upper surface of the frame 2 is made in the form of a lid so that it can be separated from the lower frame when the cartridge 10 is replaced. In addition, it is preferable that a part of the lid 4 is rotated about the hinge 5 so as to be opened and closed, so that the recording sheet 99 on which printing is completed can be taken out. On the other hand, it is preferable that a liquid crystal display (not shown in FIG. 1) and a keypad (not shown in FIG. 1) for displaying the printer state are provided on the outer peripheral surface of the printer. In addition, it is preferable to form a locking step on one side of the outer peripheral surface of the printer to prevent the printer from falling off from the installation surface when the printer falls down.

2 is a cross-sectional view of the printer shown in FIG. Hereinafter, for convenience of description, the right side of FIG. 2 is referred to as 'front' and the left side is referred to as 'back'.

The cartridge 10 is a frame for storing the transfer paper and the ink ribbon. The cartridge 10 includes a rear accommodating portion 12 having an outer circumferential surface having a substantially cylindrical shape, and a front accommodating portion extending from the upper and lower portions of the rear accommodating portion 12 toward the front. (14). The portion where the rear receiving portion 12 and the front receiving portion 14 meet at the bottom of the cartridge 10 may accommodate the capstan 50 and / or the pinch roller 52 and the cutter assembly 56 of the printer as described below. Indented upwards 18 is formed so as to extend in the horizontal direction. Transfer paper slits 16 for penetrating the transfer paper 22 in the groove 18 direction are formed on the bottom surface of the rear accommodating portion 12.

Inside the rear accommodating portion 12, a transfer paper roll 20 in which the transfer paper 22 is wound in a roll form is rotatably installed. An unused ink ribbon 26 is wound inside the front accommodating portion 14, and a supply reel 24 for releasing and supplying the ink ribbon 26 during the printing process is rotatably installed, and used above the groove 18. A winding reel 28 which winds and collects the ink ribbon 26 is rotatably installed. Between the supply reel 24 and the take-up reel 28, ribs 30 for structurally supporting the cartridge 10 are formed in the form of partition walls connected to the left and right, and the ink ribbon 26 at the lower end of the ribs 30. A slit 32 for passing the passage is provided. Metal ribs 34 in the form of crowns are preferably attached to the rear top of the ribs 30 to slit 32 to prevent wrinkles from spreading the link ribbon 26 from side to side.

On the other hand, in the front of the rib 30, a head receiving groove 38 for accommodating the thermal recording head 56 of the printer penetrates in the left and right direction at the bottom of the cartridge 10. As shown in FIG. Above the head receiving groove 38, a heat dissipation plate 40 for dissipating heat generated from the thermal recording head 56 to the external heat dissipation fins 42 is provided. A partition 44 is formed in front of the head receiving groove 38 to thermally isolate the supply reel 24 from the thermal recording head 56 and the heat sink 40, and an ink ribbon 26 is formed at the bottom of the partition 44. A slit 46 for passing the passage is provided. Accordingly, the ink ribbon 26 wound around the supply reel 24 passes through the slit 46 and the lower side of the head receiving groove 38 and the slit 32, and then winds up the reel 28 via the idling gear 36. Coiled on The capstan 50 which allows the transfer paper 22 to be transported at a constant speed without slipping by applying a friction force to the back of the transfer paper 22 by rotating a motion by a power source (not shown) below the bottom of the cartridge 10. ) Is installed. Pinch roller 52 is supported by a spring not shown is installed to be in contact with the capstan 50 in the left and right directions. In front of the capstan 50 and the pinch roller 52, a cutter assembly 54 for cutting the transfer paper portion (hereinafter, referred to as 'recording paper') on which printing is completed is installed.

On the other hand, the thermal recording head 56 is disposed in the left and right direction inside the head receiving groove 38 of the cartridge 10, and one end of the thermal recording head 56 is fixed to the printer frame 6. In the thermal recording head 56, fine heat generating elements are arranged in a line, and each heat generating element can individually generate heat in response to a signal from the printer control unit. Under the thermal recording head 56, the platen 58 for crimping the transfer paper 22 and the ink ribbon 26 to the thermal recording head to promote heat transfer and transfer is seated by the platen support 60. It is installed, the platen support 60 is raised and lowered by the cutter assembly 54 as will be described later in the state that the front can be rotated about the hinge 62.

A discharge roller carrier 70 is installed between the platen 58 and the recording paper discharge port 78 in which the discharge roller 72 and the discharge driven roller 74 are connected to each other and installed therein. The lever 76 can be rotated. The discharge roller carrier 70 maintains the state shown in FIG. 2 in the non-printing state, and when the transfer paper is to be taken out in the printing process, the transfer paper drawn by rotating by the lever 76 in the clockwise direction in the drawing is pulled out. The portion is capable of moving the tip along the inner circumferential surface of the cylindrical housing. A plurality of guide protrusions are formed on the outer circumferential surface of the discharge roller 72 to flatten the transfer paper and prevent slipping of the transfer paper. In order to prevent the transfer paper from creasing inside the printer in the process of ejecting the transfer paper, the discharge roller 72 rotates at a slightly faster speed (for example, at 1.1 times the speed) than the capstan 50, so that the transfer paper is excessive. It is desirable to have a slip device that causes slip to occur when a tensile force of a certain magnitude or more is applied to prevent a tensile force from being applied. Such a slip device itself can be easily implemented by those skilled in the art using, for example, felt and spring, so a detailed description thereof will be omitted.

3 and 4 specifically show the cutter assembly 54 shown in FIG. 2.

The cutter support part 100 which mechanically supports the cutter assembly 54 has a slit 102 which is penetrated in the front-rear direction to the left and right, and the width of the slit 102 is the front so that the transfer paper can be smoothly drawn in. The narrower it becomes. The front surface of the cutter support part 100 is formed with a recess 104 for accommodating the upper cutting blade 110 and the lower cutting blade 120. The upper surface of the recess 104 is formed with a groove 106 for accommodating the upper end of the upper cutting blade 110, the left and right both ends of the groove 106 is in communication with the front surface of the cutter support (100) 108 is formed so that the clip 130 can be fastened.

The upper cutting blade 110 includes a horizontal portion 112 that extends in the left and right direction, and vertical portions 114 and 116 that extend downward from both ends of the horizontal portion 112. The lower end of the horizontal part 112 partially covers the slit 102 of the cutter support part 100, and the lower end of the rear part of the horizontal part 112 is chamfered at an angle to operate as a blade.

The lower cutting blade 120 includes a horizontal portion 122 that extends in the left and right direction, and a vertical portion 124 that extends downward near the center of the horizontal portion 122. The front lower end of the horizontal portion 122 is chamfered at an angle to operate as a blade. In particular, the width of the horizontal portion 122 is formed to become wider as it proceeds from one end to the other end, it is preferable that the cutting proceeds in the transverse direction from any one during cutting of the transfer paper. The vertical portion 124 of the lower cutting blade 120 has a through hole 126 penetrating back and forth. In a preferred embodiment, the through hole 126 has a shape in which the second through part 126b is continuous in the left direction (refer to FIG. 3) from the lower end of the first through part 126a in the right semicircle shape.

A motor (not shown) is installed below the cutter support part 100, and the motor is connected to the cam 140 installed on the rear surface of the lower cutting blade 120. The protruding rod 142 is integrally formed on the front surface of the cam 140 to correspond to the through hole 126 of the lower cutting blade 120. When the cam 130 rotates as the motor rotates, the protruding rod 142 formed on the cam 140 moves up and down the lower cutting blade 120 while being fitted into the through hole 126 of the lower cutting blade 120. You can raise and lower with.

On the other hand, in the preferred embodiment, the cam 140 of the cutter assembly 54 performs the function of raising and lowering the platen support 60 and the platen 58 as well as the lower cutting edge 120. To this end, a through hole 61 having a similar shape to the through hole 126 of the lower cutting blade 120 is formed on the rear surface of the platen support 60. The through hole 61 has a form in which the fourth through portion 61b extends from the lower end of the left semicircular third through portion 61a in the right direction (see FIG. 3).

The cutter assembly 54 as described above is assembled as follows. First, the upper cutting edge 110 is positioned in front of the recess 104 of the cutter support 100, and then the upper cutting edge 54 is fitted to the recess 106 of the cutter support 100, thereby cutting the upper cutting edge 110. The back surface of the blade 110 is brought into close contact with the front surface of the recess 104 of the support portion 100. Then, after the protrusion bar 142 penetrates the through hole 126 of the lower cutting 120, the lower cutting 120 is in close contact with the front surface of the cutter support 100 and the upper cutting blade 110. After the assembly, the assembly is completed by fitting the clips 130 at both ends.

In the above embodiment, the cutter assembly 54 operates as follows.

First, the transfer paper cutting operation will be described with reference to FIGS. 5A and 5B. In the steady state (t = T0), the protruding rod 142 of the cam 140 is located at a point where the semicircle portion and the straight portion of the through hole 126 of the lower cutting blade 120 meet, and at this time, the cam 140 The protruding rod 142 is also located at a point where the semicircle portion and the straight portion meet with respect to the platen support 60 and the through hole 61. In this state, when the cam 140 rotates clockwise in the drawing, the force is applied to the upper inner wall of the lower cutting blade 120 and the through hole 126 while sliding in the straight portion of the lower cutting blade 120 and the through hole 126. It is added to thereby raise the lower cutting blade 120 upward (t = T1, T2). Accordingly, the blades of the upper cutting blade 110 and the lower cutting blade 120 meet and cross each other to cut the transfer paper 22. When the cutting is completed, the cam 140 is rotated counterclockwise again to return to the original position, whereby the lower cutting blade 120 returns to the original position. In this cutting process, the protruding rod 142 of the cam 140 does not affect the movement of the platen support 60 while sliding in the semicircular portion of the platen support 60 through-hole 61.

Next, the raising and lowering operation of the platen support 60 will be described with reference to FIGS. 6A and 6B. As above, in the normal state (t = T0), the protruding rod 142 of the cam 140 is located at a point where the semicircle portion and the straight portion of the through hole 126 of the lower cutting blade 120 meet, and at this time, the cam ( The protrusion bar 142 of the 140 is also located at the point where the semi-circle portion and the straight portion meet with respect to the platen support 60 through hole 61. In this state, when the cam 140 rotates counterclockwise in the drawing, the cam 140 slides inside the straight portion of the through hole 61 of the platen support 60 and is positioned on the upper inner wall of the through hole 61 of the platen support 60. The force is applied, thereby lifting the platen support 60 upward (t = T3, T4). At this time, the platen support 60 is rotated about the hinge 62 on the opposite side to be in close contact with the thermal transfer head 56 to press the transfer paper 22 and the ink ribbon 26 to the thermal transfer head 56 The dye applied to the ink ribbon 26 is transferred to the transfer paper 22. When the ink ribbon dye transfer to the transfer paper is completed, the cam 140 rotates clockwise again to return to the original position, and the platen support 60 returns to the original position. In this cutting process, the protruding rod 142 of the cam 140 does not affect the movement of the lower cutting blade 120 while sliding in the semi-circular portion of the lower cutting blade 120 and the through hole 126.

Thus, in the preferred embodiment of the present invention, only one motor and the cam can implement both the transfer paper cutting and platen lifting operation.

7 shows an electrical configuration of the printer shown in FIGS. 1 and 2. The printer is connected to an information apparatus such as a PC, for example, to receive print data and to print. The printer controller 150 is connected to the external information device through the interface unit 152, stores print data received from the external information device in the memory 154, and controls the overall operation of the printer to perform printing. The memory 154 stores firmware for the operation of the controller 150 and buffers the print data received from the external information device. In such a printer, the control unit 150 controls the heat generation of the thermal recording head 56 by applying a thermal control signal to the thermal recording head 56 in accordance with the print data. In addition, the control unit 150 is the transfer paper roll 20, the ribbon winding reel 28, the capstan 50, the platen 58, the discharge roller 72, and the cutter assembly driving motor through the motor drive unit 156 ( Control the rotation of the (not shown). The transfer paper roll 20, the ribbon winding reel 28, the capstan 50, the platen 58, the discharge roller 72, and the cutter assembly driving motor include a motor installed in the right frame of the frame body, for example, a gear or a belt. Coupled to the same power transmission means are driven by a coupler, the power transmission means or the coupler itself can be easily implemented by those skilled in the art to which the present invention belongs, the detailed description thereof will be omitted. On the other hand, the controller 150 displays the printer status on the display 158, and accepts a user's operation command through the keypad 160.

Such a printer operates as follows.

At the time of initial installation, the printer is in a state as shown in FIG. 8A, where the transfer sheet is positioned inside the cartridge 10 while the transfer paper is wound around the transfer roll 20. The state immediately after replacing the cartridge 10 during use is also as shown in Fig. 8A.

In this state, when the power is supplied, the transfer paper roll 20 rotates in a counterclockwise direction so that the tip of the transfer paper 22 is drawn out through the transfer paper slit 16 provided on the bottom surface of the cartridge 10, thereby capstan 50 and pinch. It is inserted between the rollers 52. By the clockwise rotation of the capstan 50 and thus the rotation of the pinch roller 52, the transfer paper tip passes through the cutter assembly 54 and reaches above the platen 58. By continuous rotation of the transfer paper roll 16, the capstan 50 and the pinch roller 52, the transfer paper tip passes through the discharge roller 72 and the discharge driven roller 74 to reach the state shown in FIG. 8B. It waits in the state and waits for a print command. In the preferred embodiment, the distance between the printing point of the thermal recording head 56 and the tip of the transfer sheet 22 is equal to the length of one recording sheet, so that printing can be started without additional transfer sheet transfer after the print command is applied.

When the print command is input, the protrusion rod 142 of the cam 140 in the cutter assembly 54 lifts the platen support 60 upward as shown in FIG. 8C, and thus the platen support ( 60 is rotated about the hinge 62 on the opposite side to raise the platen 58 so as to be pressed against the thermal recording head 56 at an appropriate pressure with the ink ribbon 26 and the transfer paper 22 therebetween. The transfer paper 22 is transported backward by the capstan 50 and the pinch roller 52 which rotates counterclockwise, and the transfer paper roll 20 also rotates clockwise to prevent the transfer paper from being wrinkled. 28 rotates counterclockwise so that the ink ribbon 26 proceeds at the same speed as the transfer paper, and the platen 58 also rotates counterclockwise so that the transfer paper 22 and the ink ribbon 26 are moved by frictional force. ) Will proceed at the same speed. In this state, the yellow (Y) color dye on the ink ribbon 26 is transferred to the transfer paper by subliming or melting the ink ribbon 26 by applying heat to the thermal recording head 56 in contact with the ink ribbon 99. The settling printing begins.

As shown in FIG. 8D, when the transfer paper tip reaches the printing point between the thermal recording head 56 and the platen 58 and the printing of the yellow (Y) color is finished, a paper sensor for detecting the completion of printing (not shown) ) Detects this and sends an electrical signal to the controller 150, and as shown in FIG. 8E, the capstan 50, the pinch roller 52, and the transfer paper roll 20 rotate under the control of the controller 150. And the cam 140 in the cutter assembly 54 rotates to return the protruding rods 142 and the platen support 60 to their original positions so that the platen support 60 has the hinge 62 on the opposite side. By rotating around the platen 58 is lowered. At this time, when the winding roller 28 detects by the ribbon sensor (not shown) that the tip portion of the magenta (M) color of the ink ribbon reaches the printing point between the thermal recording head 56 and the platen 58. Can be further rotated.

Then, the transfer paper roll 22 rotates in a counterclockwise direction and the capstan 50 rotates in a clockwise direction so that the transfer paper is transferred forward by the driving force of the transfer paper roll 22 and the capstan 50, and the transfer paper tip is It passes through the discharge roller 72 and the discharge driven roller 74, and returns to the state shown in FIG. 8B. Subsequently, as shown in FIG. 8C, the platen 58 is raised by the action of the cam 140 in the cutter assembly 54 so as to sandwich the ink ribbon 26 and the transfer paper 22 therebetween. 56, and the capstan 50, the transfer paper roll 20 and the take-up roller 28 are rotated while the thermal recording head 56 is heated to generate magenta (M) colors.

When the printing of magenta (M) color is finished, the rotation of the capstan 50 and the pinch roller 52 and the transfer paper roll 20 is stopped as shown in FIG. 8E, and the cam 140 in the cutter assembly 54 is stopped. ) Is rotated to return the protruding rod 142 and the platen support 60 to the original position, and the platen support 60 rotates about the hinge 62 on the opposite side, thereby causing the platen 58 to descend. . Subsequently, the transfer paper roll 20 rotates counterclockwise and the capstan 50 rotates clockwise so that the transfer paper tip passes through the discharge roller 72 and the discharge driven roller 74 to return to the state shown in FIG. 8B. do. Subsequently, as shown in FIG. 8C, the platen 58 is raised by the action of the cam 140 in the cutter assembly 54 so as to sandwich the ink ribbon 26 and the transfer paper 22 therebetween. 56, and the capstan 50, the transfer paper roll 20 and the take-up roller 28 are rotated while the thermal recording head 56 generates heat to print cyan color. In addition, when the ink ribbon is provided with an overcoat (ov) dye layer for preventing black (B) or print layer deterioration, the dye layer is printed in the same manner.

When the printing of all the dye layers is finished, the rotation of the capstan 50 and the pinch roller 52 and the transfer paper roll 20 is stopped and the cam 140 in the cutter assembly 54 as shown in FIG. 8E. By action, the platen 58 descends. Thereafter, the transfer paper roll 20 rotates counterclockwise and the capstan 50 rotates clockwise to transfer the transfer paper. When the end of the portion printed on the transfer paper reaches the cutter assembly 54, the cam 140 in the cutter assembly 54 is rotated to apply a force to the upper inner wall of the lower cutting blade 120 through hole 126. Accordingly, the lower cutting blade 120 is lifted upward. Accordingly, the blades of the upper cutting blade 110 and the lower cutting blade 120 meet and cross each other to cut the transfer paper 22. When the cutting is completed, the cam 140 is rotated counterclockwise again to return to the original position, whereby the lower cutting blade 120 returns to the original position. Subsequently, while the discharge roller 72 and the discharge driven roller 74 rotate to transfer the recording paper 22a, the lever 76 rotates to displace the discharge roller carrier 70 in the state shown in FIG. Accordingly, the recording paper 22a is discharged to the discharge port 78. When discharge of the recording sheet 22a is completed, the discharge roller carrier 70 is restored to its original state.

As described above, according to the printer according to the preferred embodiment, the transfer paper roll and the ink ribbon roll are accommodated in one cartridge, and the ink ribbon 26 wound on the supply reel 24 is passed through the thermal recording head 56. The transfer paper roll 20 on which the transfer paper 22 is wound while being wound on the take-up reel 28 repeats bidirectional rotation to print three colors of ink on the transfer paper in a plane-sequential manner, thereby adsorbing each dye onto the transfer paper. Full color is realized by adjusting by the amount of heat generated. The ink ribbon recovered as the printing proceeds is wound on the take-up reel 28, while the portion of the transfer paper on which printing is completed, that is, the recording paper, is discharged to the outside.

According to the printer of the present invention, by placing the cutter between the transfer paper roll and the thermal transfer head to reduce the distance between the transfer paper roll and the cutter as much as possible, it is possible to accurately cut the desired position to completely remove the margin on the recording paper It can be minimized. In addition, since the stakes that can occur during the cutting process of the recording paper stick to the used ink ribbon and are wound on the winding reel, this stake is stuck to the unused ink ribbon by static electricity to prevent the dye from being transferred to the transfer paper during the next printing process. This eliminates problems such as missing pixels. On the other hand, according to a preferred embodiment, it is possible to perform the cutting operation of the cutter and the raising and lowering operation of the platen with only one motor and the cam.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, according to the printer of the present invention, a cutter is disposed between the transfer paper roll and the thermal transfer head, so that the distance between the transfer paper roll and the cutter is reduced as much as possible, so that the desired position can be precisely cut, thereby leaving a margin on the recording paper. There is an effect that can be removed or minimized completely. In addition, since the stakes that can occur during the cutting process of the recording paper stick to the used ink ribbon and are wound on the winding reel, this stake is stuck to the unused ink ribbon by static electricity to prevent the dye from being transferred to the transfer paper during the next printing process. In this case, problems such as missing pixels may not occur. On the other hand, according to a preferred embodiment of the present invention, it is possible to perform the cutting operation of the cutter and the raising and lowering operation of the platen with only one motor and the cam, thereby reducing the number of parts.

Claims (3)

In a printer using recording paper wound in a roll form, A paper roll on which the recording paper is wound; A recording head for printing onto the recording paper; A platen assembly for selectively adhering the recording paper to the recording head; A cutter assembly disposed on a recording paper path between the paper roll and the recording head to cut the recording paper on which printing is completed; A motor capable of forward and reverse rotation in a predetermined angle range; And A cam connected to the motor and having a protruding rod attached to an outer circumferential surface thereof; And The cutter assembly is provided with a first through hole having a first shape corresponding to the protrusion bar, and the cutting blade of the cutter assembly may be lifted in the vertical direction by the protrusion rod as the motor rotates. The platen assembly also has a second through hole having a second shape corresponding to the protruding bar, wherein the platen assembly is moved up and down by the protruding bar in accordance with the rotation of the motor. The method of claim 1, The first through hole has a shape in which a second through part of a straight line is connected to the first through part of a semicircle shape. The second through hole has a shape in which a fourth through part of a straight line is connected to a third through part of a semicircle shape. And the first through portion and the second through portion are formed in directions opposite to each other. delete

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