JP5213385B2 - Printer - Google Patents

Description

  The present invention relates to a printer that performs printing by transferring ink on an ink sheet onto a recording sheet using a thermal head.

  The printer is configured to print an image (including characters and symbols) on a recording material such as printing paper based on the image information. As the recording material, sheet materials of various materials such as paper, cloth, plastic sheet, OHP sheet, and the like are used. There are two types of printing methods for printers: a serial method and a line method. In the serial method, an image is printed while alternately repeating main scanning for moving a printing head along the recording material and paper feeding (sub-scanning) of the recording material. On the other hand, in the line method, by using a long print head extending in the width direction of the recording material, an image is printed only by paper feeding (sub-scanning) of the recording material while printing one line at a time. I will do it.

  Printers can be classified into thermal transfer type, thermal type, ink jet type, laser beam type, wire dot type, etc., depending on the recording method. Among them, the thermal transfer type presses the recording material and the thermal head across the ink sheet, and heats and transfers the ink on the ink sheet while running the ink sheet in synchronization with the conveyance of the recording material. Is recorded on the recording material. The thermal transfer printer includes a sublimation type and a melt type.

  FIG. 7 is a schematic diagram showing the configuration of a conventional thermal transfer printer.

  Hereinafter, the printing operation will be described with reference to the schematic diagram of FIG. As shown in FIG. 7, the thermal head 1 is composed of a heating unit having a plurality of heating elements 1a, and selectively heats the heating elements 1a in accordance with the recording information and uniformly coats the ink sheet 3. The applied ink is transferred to the recording paper P. The recording paper P is stacked on the recording paper storage unit 5, and when a print start instruction is input by an operation member (not shown), the paper feed roller 8 rotates to feed the recording paper one by one from the recording paper storage unit 5. Paper. At this time, even if the recording paper P stored in the recording paper storage unit 5 is reduced by pressing the recording paper stored in the storage unit toward the paper supply roller by the pressure plate 15, the paper supply roller 8 enables paper feeding. The recording paper P discharged from the recording paper storage unit 5 is transported to a printing position where the thermal head 1 is located through a transport path 6 of A1 and A2. The thermal head 1 and the platen roller 2 are opposed to each other with the conveyance path for the recording paper P and the ink sheet 3 interposed therebetween. At the time of printing, the ink sheet 3 and the recording paper P drawn out from the supply-side bobbin 3a are pressure-bonded with an appropriate pressure by the thermal head 1 and the platen roller 2 so that the ink can be transferred to the recording paper P. It becomes a state. A capstan roller 4a and a pinch roller 4b are provided at positions facing each other across the conveyance path 6. The ink is transferred to the recording paper P by the thermal head while the recording paper P is conveyed in the printing direction from the printing start position to the printing end position by the rotation of the two rollers, and the printing operation is executed. At this time, the ink sheet 3 after being peeled off from the recording paper P and transferred to the recording paper is wound around the take-up bobbin 3b. In a color thermal transfer printer, three colors, yellow, magenta, and cyan, and an overcoat are transferred to a recording sheet. Therefore, the recording paper P once transported to the printing end position is reversely transported by the reverse rotation of the capstan roller 4a and the pinch roller 4b and returned to the printing start position, and the above-described printing operation is repeated a plurality of times. When the overcoat transfer is completed and printing is completed, the recording paper P is conveyed in the A3 direction and discharged from the printer.

  In such a thermal transfer printer, in order to transfer the ink applied to the ink sheet 3 to the recording paper P with high accuracy, the ink sheet 3 and the recording paper P must be sufficiently pressed together, and the thermal head 1 and the platen It is necessary to press the roller 2 with an appropriate pressure. Further, since the heating element 1a of the thermal head 1 is selected and heated with high accuracy in the main scanning direction, the heating element 1a of the thermal head 1 also needs to maintain high positional accuracy with respect to the platen roller 2.

  On the other hand, for example, when the recording paper P is reversely transported, only the ink sheet is transported, or the ink sheet is exchanged, except during the printing operation (while the ink is transferred to the recording paper P) In this case, the thermal head 1 and the platen roller 2 need to be separated from each other.

Therefore, in Patent Document 1, a thermal head that is brought into pressure contact with the platen roller is attached to a tip portion of a head lever having a head lever fixed to a rotating shaft, and the thermal head is attached to the platen roller as the rotating shaft rotates. On the other hand, there is disclosed a technique for operating in a freely detachable manner.
JP 2001-063174 A

  However, in the conventional example, the mechanism for separating the thermal head and the platen roller is enlarged, and the printer is also enlarged accordingly. On the other hand, in order to reduce the size of the entire apparatus, it may be possible to reduce the size of the mechanism for fixing and separating the thermal head. However, if this is reduced, the thermal head is fixed and separated. There is a possibility that the rigidity of the mechanism for causing the damage is impaired. If the rigidity is impaired, there is a concern that the positional accuracy between the heating element 1a and the platen 2 of the thermal head 1 is lowered, and the frame member for moving the thermal head due to the pressing of the thermal head 1 and the platen 2 is concerned.

  In addition to the printing unit that performs the printing operation, the thermal transfer printer separates the recording paper from the recording paper storage unit and feeds the recording paper into the recording paper transport path, and records from the paper feeding unit to the printing unit. A transport unit for transporting paper is required. In recent years, single components such as motors and sensors tend to be miniaturized, and the space for a paper feeding unit and a conveyance unit has been reduced. Under such circumstances, when the member for separating the thermal head and the platen roller is increased in size, the proportion of the entire apparatus increases. For this reason, it has been a direct factor in increasing the size of the entire printer.

  In addition, the thermal transfer printer as described above requires not only a mechanism for pressing the thermal head and the platen roller, but also a mechanism for pressing the recording paper against the sheet feeding roller. It was.

  The present invention has been made in view of the technical problems as described above, and aims to reduce the size and simplify the printer by connecting and interlocking a plurality of pressure mechanisms required for the printer. To do.

  In order to achieve the above object, a printer of the present invention provides a pressing unit that presses a plurality of recording sheets stored in a recording sheet storage unit when feeding, and a recording sheet that is pressed by the pressing unit. A state in which the ink sheet and the recording paper are overlapped between the paper feed roller, the thermal head that transfers the ink of the ink sheet onto the recording paper, and the thermal head. And a moving member that moves in response to a printing operation. The pressing portion and the thermal head are provided on the moving member, and the pressing portion and the thermal head are both ends of the moving member in the moving direction. A printer provided on the side.

  As described above, according to the present invention, it is possible to reduce the size of the printer and simplify the operation by connecting a plurality of pressure mechanisms that have been conventionally independent.

(First embodiment)
Embodiments of the present invention will be specifically described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the member and structure which have the same function through each drawing.

  First, the printer of this embodiment will be described with reference to FIGS. FIG. 1 shows the state of the printer during a printing operation, FIG. 2 shows the state of the printer during paper feeding, and FIG. 3 shows the state of the printer during printing standby.

  The printer shown in FIGS. 1 to 3 forms an image by driving the heating element of the thermal head 1 based on the image information and thermally transferring the ink applied to the ink sheet onto a recording paper such as a printing paper. Printer.

  Reference numeral 1 denotes a thermal head, which has a heating unit having a plurality of heating elements, and prints an image on the recording paper P by selectively heating the heating elements according to image information. Reference numeral 2 denotes a platen roller which is provided at a position facing the thermal head and the recording paper P with a conveyance path therebetween. Reference numeral 3 denotes an ink sheet to which ink is applied, in which yellow (Y), magenta (M), cyan (C), and overcoat (OC) are periodically applied. The ink sheet 3 is wound around the supply-side bobbin 3a. At the time of printing, the ink sheet is pulled out from the supply-side bobbin 3a, and the ink sheet used for printing is wound around the winding-side bobbin 3b. At the time of printing, the ink applied to the ink sheet 3 is selectively heated by heating the heating element of the thermal head 1 in a state where the ink sheet 3 and the recording paper P are superposed and pressed by the thermal head 1 and the platen roller 2. Is transferred to the recording paper P. 4a is a capstan roller, 4b is a pinch roller, and these two rollers are provided at positions facing each other across the conveyance path of the recording paper P. During printing, the recording paper is sandwiched between these two rollers, and the recording paper P is transferred to the recording paper P by the thermal head while the recording paper P is conveyed in the printing direction from the printing start position to the printing end position by the rotation of the roller. Executed.

  A recording paper storage unit 5 stores a plurality of recording papers used for printing.

  Reference numeral 7 denotes a pressure plate, and 8 a paper feed roller, which are provided at positions facing each other across the recording paper of the recording paper storage unit 5.

  A frame member 9 is configured to be rotatable about 9a as a rotation axis. A thermal head 1 and a thermal head spring 10 are provided at the end of the frame member opposite to the rotation axis. A pressure plate 7 and a pressure plate spring 11 are provided on the recording paper storage portion side of the frame member. Therefore, the thermal head and the pressure plate can be moved by rotating the frame member. Reference numeral 12 denotes a conveyance roller for conveying the recording paper.

  The operation at the time of printing of the printer of this embodiment will be described with reference to the flowchart of FIG. 8 and the drawings of FIGS. The processing of the flowchart in FIG. 8 is executed by a CPU (not shown) of the printer performing control of each unit and arithmetic processing based on a program read from a program memory (not shown).

  First, when an instruction to start printing is input from the user via an operation unit (not shown) (S101), the frame member 9 is rotated and moved to the paper feed position in FIG. 2 about the frame axis 9a as a rotation axis. By moving the frame member 9 to the paper feeding position, the pressurizing plate 7 comes into contact with the recording paper P, and further, the pressurizing plate spring 11 is contracted. At the same time, since the thermal head 1 is greatly separated from the platen roller 2, the ink sheet 3 a and the recording paper P are in a state in which the thermal head 1 can freely transport the transport path between the platen rollers 2. The recording paper P in the recording paper storage unit 5 is pressed against the paper feed roller side by the pressure spring 11 and the pressure plate 7 and rotates the paper feed roller so that the recording paper on the paper feed roller side is one sheet at a time. The paper is sent out from the recording paper storage unit 5 and a paper feeding operation is performed (S103). The recording paper P delivered from the recording paper storage unit 5 in the B1 direction is transported in the B2 direction by the transport roller 12 and transported to the recording start position where the thermal head 1 is located (S105). In this embodiment, the recording paper P has a conveyance path in which the recording paper rotates 180 degrees in the printer when the thermal head 1 reaches the recording start position where the thermal head 1 is located. A conveyance path is provided by being curved. This curved conveyance path guides the recording paper fed from the recording paper storage unit 5 to the thermal head 1. That is, the recording paper P sent out by the paper feed roller 8 is conveyed toward the printing unit in the printer while being guided by the first conveyance roller 12 on the curved surface of the curved conveyance path 6. At this time, the first transport roller 12 is urged against the transport surface of the transport path 6 with a constant pressing force, and is synchronized with the paper feed roller 8 by the same driving means as the paper feed roller 8. What rotates is suitable.

In parallel with the transport operation of the recording paper P, the head of the ink sheet is set, and the yellow (Y) marking screen of the ink sheet is pulled out to the printing start position (S104). When the ink sheet and the recording paper P are conveyed to the printing start position, the frame member 9 is rotated to the printing position. FIG. 1 shows a state of the printer when the frame member 9 is moved to the printing position. In FIG. 1, the thermal head 1 is urged toward the platen roller, and the ink sheet 3 and the recording paper P drawn out from the supply side bobbin 3 a are pressed by the thermal head 1 and the platen roller 2 with an appropriate pressure. In this state, the recording paper is conveyed by the capstan roller 4a and the pinch roller 4b, and further, the recording head is heated by rotating the take-up bobbin to convey the ink sheet, and the samar head is heated according to the image information. Ink is transferred to the paper P (S107). In a sublimation type thermal transfer printer, three colors of yellow (Y), magenta (M), and cyan (C) and an overcoat (OC) that is a protective layer are transferred onto a recording sheet. Therefore, when the transfer for one color is completed, it is confirmed whether the transfer of all of Y, M, C, and OC is completed (S108). If the transfer of the three colors and the protective layer is not completed, the frame member 9 is moved to the standby position as shown in FIG. 3 (S109). Thereafter, in order to perform transfer of the next color (or OC), the recording paper P at the printing end position is reversely conveyed by the reverse rotation drive of the capstan roller 4a and the pinch roller 4b and returned to the printing start position again. (S110). Also, the ink sheet is transported to the next color printing start position. In S109, the thermal head 1 is moved away from the platen roller 2 by moving the frame member 9 to the print standby position. Since the thermal head 1 and the platen roller 2 are separated from each other, the recording paper P and the ink sheet can be freely conveyed without interference, and the recording paper P is conveyed in a direction opposite to the printing direction. The ink sheet can be conveyed in the printing direction. When the ink sheet and the recording paper P are conveyed to the printing start position, the processes of S106 to S110 are performed again to transfer the next color or OC.
When the transfer to the OC is completed, the process proceeds from S108 to S111, the frame member 9 is moved to the standby position as shown in FIG. 3, and the recording paper P is conveyed in the direction B3 in FIG. (S112). Next, it is confirmed whether there is any other print job (S113). If there is a receiving unit, the processes from S103 on are performed again. If there is no job, the printing operation is terminated as it is.

  Thus, in this embodiment, the frame member 9 moves to the printing position shown in FIG. 1 when ink is being transferred by the thermal head 1, and when the recording paper is fed from the recording paper storage unit 5. It moves to the paper feeding position shown in FIG. Other than that, when the recording paper is reversely conveyed or in the print standby state, the frame member 9 moves to the standby position in FIG.

  At the time of printing in which the ink on the ink sheet is transferred to the recording paper, the heating element of the thermal head 1 and the platen 2 are fixed with high precision, and the recording paper and ink sandwiched between the thermal head 1 and the platen roller 2 are used. It is necessary to apply a certain pressure to the seat. Therefore, in the state of FIG. 1 at the time of printing, the frame member 9 rotates in the space between the ink sheet 3 or the platen roller 2 and the recording paper storage unit 5 with the frame shaft 9a as the rotation axis, and the ink sheet 3 and the platen It has moved to the roller 2 side. The thermal head 1 that has been separated from the platen roller 2 during printing standby comes into contact with the platen roller 2, and the thermal head 1 and the platen roller are pressed against the thermal head spring 10 by elasticity. At the same time, the pressure plate 7 provided integrally and continuously with the frame member 9 moves in a direction away from the recording paper P, so that the pressure plate 7 is completely separated from the recording paper P, and the recording paper P is separated from the recording paper P. The pressing state with the sheet feeding roller 8 is in a state of being canceled. In this state, for example, even when the paper feed roller 8, the capstan roller 4a, and the pinch roller 4b are configured to rotate by one drive motor, the capstan roller 4a and the pinch roller 4b are rotated. The recording paper P is not fed by the paper feed roller 8. Since it is necessary to press the recording paper P during ink transfer, only the thermal head 1 and the platen roller 2 are in a pressed state. On the other hand, since the frame member 9 and the pressure plate 7 are sufficiently separated from the recording paper and other members, printing can be performed stably without interfering with the recording P and other members.

  Next, during paper feeding, the frame member 9 moves to the recording paper storage unit 5 side through the space between the ink sheet 3 or the platen roller 2 and the recording paper storage unit 5. As a result, the pressure plate 7 moves toward the recording paper storage unit 5 and comes into contact with the recording paper P loaded on the recording paper storage unit 5. Further, when the frame member 9 moves to the position at the time of paper feeding, the pressure plate spring 11 contracts, and the pressure plate 7 presses the loaded recording paper P toward the paper feed roller 8 with a desired pressing force. In this state, by rotating the paper supply roller 8 in the transport direction, the recording paper P can be separated and sent out from the recording paper storage unit one by one. At the same time, since the thermal head 1 moves away from the platen roller 2, the pressing state between the thermal head 1 and the platen roller 2 is canceled, and the ink sheet 3 and the recording paper P are transferred to the thermal head 1 and the platen roller 2. It is possible to go back and forth freely.

  At the time of printing standby or when the recording paper is reversely conveyed at S110 after ink is transferred, the frame member 9 moves to the standby position as shown in FIG. By moving to this standby position, the pressing state of the thermal head 1 and the platen roller 2 and the pressing state of the pressure plate 7 against the recording paper P are eliminated. Further, since the thermal head 1 and the platen roller 2, the pressure plate 7 and the recording paper P are in a state of being separated from each other, they do not interfere with each other. Therefore, the recording paper P and the ink sheet 3 can be freely conveyed without interfering with the thermal head 1 and the platen roller 2 in the conveyance path between the thermal head 1 and the platen roller 2. Also, consider a case in which a plurality of rollers (4a, 4b, 8, 12) for conveying recording paper are rotated by a single drive motor. If the recording paper P is reversely transported while the recording paper P is pressed by the pressure plate 7, the recording paper P on the paper feed roller side is reversely transported and hits the recording paper storage portion, which may damage the recording paper. is there. However, in the printer of the present embodiment, when the paper is not fed, the frame member is moved and the pressure sheet 7 does not press the recording paper against the paper feeding roller. Therefore, even if the paper feeding roller is driven, the recording paper is not moved. It will not be transported.

  In this embodiment, the frame rotation shaft 9a, which is the rotation center of the frame member 9 that fixes and separates the thermal head, is a space between the recording paper storage unit 5 and the bobbins 3a and 3b in which the ink sheets are stored. Is located outside. Further, the frame member 9 for fixing and separating the thermal head is configured to be rotatable in a lever shape. If the frame member 9 is to be miniaturized, the frame shape must be made thinner or the plate pressure and width of the frame must be reduced. If miniaturization is performed by such a method, the rigidity of the frame member 9 may be impaired, and the thermal head 1 and the recording paper P may not be pressurized. Further, since the heating element of the thermal head 1 generates heat during printing, the frame member 9 tends to become high temperature. Therefore, it is common to provide heat dissipation fins (not shown) on the frame member 9 or to provide cooling fans (not shown) in the direction of blowing air to the frame member 9. For these reasons as well, the effect of cooling is higher if the plate pressure and width of the frame member are not reduced, and the area that hits the cooling fan is increased by making the plate pressure and width large as in this embodiment, In addition, there is an advantage that rigidity can be maintained.

  Also, when the recording paper P is reversely conveyed in S110, care must be taken so that the trailing edge of the recording paper P reaches the recording paper storage unit 5 and the recording paper P is not damaged. Specifically, as in the present embodiment, it is conceivable that the conveyance path from the print start position where the thermal head 1 is located to the recording paper storage unit 5 is configured to be longer than the length in the conveyance direction of the recording paper P. It is done. Further, a mechanism may be prepared in which a temporary discharge port (not shown) is provided so that the recording paper P does not hit the recording paper storage unit 5 even when the recording paper P is conveyed backward.

  In the printer of this embodiment, since the thermal head 1 is provided above the recording paper storage unit 5, the recording paper transport path is 180 degrees from the recording paper storage unit 5 to the print start position where the thermal head 1 is located. It is curved. If the curvature radius of the curved surface is small, the recording paper may be damaged or bent during the conveyance of the recording paper, so it is desirable that the curvature radius is large. For this reason, when the radius of curvature is increased, the space between the recording paper storage unit 5 and the thermal head 1 also increases. If a lever-shaped frame member is disposed in the space between the recording paper storage unit 5 and the thermal head 1 as in this embodiment, this space can be used effectively.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS.

  Since the printer according to the second embodiment has basically the same configuration as that of the first embodiment, only parts different from those of the first embodiment will be described.

  In the second embodiment, the recording paper P and the ink sheet 3 are stored in one cassette. The cassette 13 stores recording paper P and the number of ink sheets corresponding to the number of recording paper P, and the recording paper and the ink sheet are consumed at the same timing. For this reason, conventionally, the remaining amounts of ink and recording paper were detected, and when the remaining amount was exhausted, it was necessary to replace and replenish each. In this embodiment, either the remaining amount of recording paper or ink sheet is either Can be recognized. Also, replacement and replenishment when the remaining amount is exhausted is excellent in convenience because it is only necessary to replace the cassette 13 with a new one.

  The configuration of the printer according to this embodiment will be described with reference to FIGS. FIG. 4 shows a state during printing by the thermal head 1, FIG. 2 shows a state during paper feeding, and FIG. 6 shows a state during standby for printing.

  The cassette 13 of this embodiment is provided with a recording paper storage unit 5 for storing the recording paper P and an ink sheet storage unit for storing ink sheets. Further, a space in which the thermal head can enter between the ink sheet pulled out from the ink sheet storage portion and exposed so that the ink sheet 3 can be sandwiched between the thermal head 1 and the platen roller 2 when the cassette is mounted, and the recording paper storage portion. Is provided.

  Also in the second embodiment, as in the first embodiment, a mechanism for pressing the thermal head 1 toward the platen roller 2 and a mechanism for pressing the recording paper P toward the paper feed roller are one frame member. 14 at both ends. However, in this embodiment, the lever shape is not adopted. This is because the recording paper and the ink sheet are accommodated in one cartridge as shown in FIG. 4 and the space where the thermal head can be installed is limited. When the frame member is enlarged in a lever shape, it is necessary to increase the space for the thermal head to enter. However, if this space is increased, the cassette 13 will inevitably become larger. In this embodiment, the frame member 14 that is a moving member is not a lever shape but a small member. Further, the frame member 14 moves in accordance with the printing operation, similarly to the frame member 9 of the first embodiment. That is, in S106 of the flowchart of FIG. 8, as shown in FIG. 4, the thermal head moves to a position where it is urged toward the platen roller. In S103, the frame member 14 moves so as to be in the state of FIG. 5, and the pressure plate 7 presses the recording paper P toward the paper feed roller 8, and the pressure plate 7 functions as a pressing member. In S109 and S110, as shown in FIG. 6, the frame member 14 is moved to the standby position, the pressing state of the thermal head and the pressure plate is eliminated, and the frame member 14 is moved to a position where it does not interfere with other members.

  In the case of the present embodiment, in the standby state, it is particularly essential that the pressure sheet 7 does not contact the recording paper P at the same time that the ink sheet does not contact the thermal head 1. When the cassette 13 is loaded, it is necessary to be in the above-described standby state so that the recording paper or ink sheet does not come into contact with other members and become damaged. For this reason, it is preferable to move the printer to the standby state described above when the printer is turned on or off, or before or after the start of printing. Also, during printing standby and paper feeding, the platen roller and the frame member are moved away from the thermal head, so that the recording paper and ink sheet come into contact with the platen roller when transporting the recording paper and loading the cassette. It can be prevented from being damaged.

  In the above-described embodiment, the pressure plate and the thermal head are integrally provided on the frame member. However, instead of the thermal head, a platen head may be provided on the frame member side, and the thermal head may be disposed on the opposite side.

  Further, in the above-described embodiment, the pressure plate and the thermal head are connected and integrated with one frame member, but are not configured with one member but are configured as separate members, respectively. It may be configured such that the two members are always moved in the same manner in conjunction with the drive source.

1 is a schematic diagram illustrating a configuration of a printer at the time of printing according to an embodiment of the present invention. 1 is a schematic diagram illustrating a configuration of a printer at the time of paper feeding according to an embodiment of the present invention. 1 is a schematic diagram illustrating a configuration of a printer at the time of printing standby according to an embodiment of the present invention. 1 is a schematic diagram illustrating a configuration of a printer at the time of printing according to an embodiment of the present invention. 1 is a schematic diagram illustrating a configuration of a printer when printing and feeding according to an embodiment of the present invention. FIG. 1 is a schematic diagram illustrating a configuration of a printer at the time of printing standby according to an embodiment of the present invention. It is the schematic which shows the structure of the conventional printer. 6 is a flowchart of processing of a printer according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thermal head 2 Platen roller 3 Ink sheet 3a Ink sheet supply side accommodating part 3b Ink sheet take-up side accommodating part 4a Capstan roller 4b Pinch roller 5 Recording paper accommodating part 6 Conveyance path 7 Pressure plate 8 Feed roller 9 Frame member 9a Frame rotation shaft 10 Thermal head spring 11 Pressure leaf spring 12 Conveying roller 13 Cassette 14 Frame member 15 Pressure plate

Claims (9)

A pressing unit that presses a plurality of recording sheets stored in the recording sheet storage unit during paper feeding;
A paper feed roller for feeding the recording paper pressed by the pressing unit;
A thermal head that prints by transferring the ink of the ink sheet onto the recording paper; and
A platen roller that is provided at a position facing the thermal head and conveys the ink sheet and the recording paper in a state of being overlapped with the thermal head;
A moving member that moves in response to a printing operation,
Printer the pressing portion and the thermal head, characterized in that provided the moving member is provided on, on both end sides of the moving direction of the pressing portion and the thermal head each of said moving member. The moving member is
At the time of paper feeding, the pressing portion has moved to a position for pressing the plurality of recording papers,
2. The printer according to claim 1, wherein at the time of printing, the thermal head is moved to a position for pressing the platen roller. The moving member is
The printer according to claim 1, wherein the printer is movable to a position where the pressing unit presses the recording paper, a position where the thermal head presses the platen roller, and a standby position.   The printer according to claim 1, wherein the platen roller is provided at a position facing the recording paper storage unit with the moving member interposed therebetween.   The printer according to claim 4, wherein the moving member is movable in a space sandwiched between the platen roller and the recording paper storage unit.   The printer according to claim 1, wherein the thermal head is provided at one end of the moving member, and the pressing portion is provided at the other end.   The printer according to claim 1, wherein the moving member rotates about a rotation shaft, and the thermal head is provided at an end of the moving member opposite to the rotation shaft.   The printer according to claim 7, wherein the moving member has a lever shape that protrudes toward the recording paper storage portion, and the pressing portion is provided on the convex side of the moving member. .   The printer according to claim 7, further comprising a cooling unit for cooling the moving member.

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