WO2013037274A1 - 具有多色打印功能的热转印打印机和打印方法 - Google Patents

具有多色打印功能的热转印打印机和打印方法 Download PDF

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Publication number
WO2013037274A1
WO2013037274A1 PCT/CN2012/081023 CN2012081023W WO2013037274A1 WO 2013037274 A1 WO2013037274 A1 WO 2013037274A1 CN 2012081023 W CN2012081023 W CN 2012081023W WO 2013037274 A1 WO2013037274 A1 WO 2013037274A1
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WO
WIPO (PCT)
Prior art keywords
printing
roller
cam
curved
curved rod
Prior art date
Application number
PCT/CN2012/081023
Other languages
English (en)
French (fr)
Inventor
高明
邓少华
姜天信
王鑫
Original Assignee
山东新北洋信息技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 山东新北洋信息技术股份有限公司 filed Critical 山东新北洋信息技术股份有限公司
Publication of WO2013037274A1 publication Critical patent/WO2013037274A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16517—Cleaning of print head nozzles
    • B41J2/16552—Cleaning of print head nozzles using cleaning fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/02—Air-assisted ejection

Definitions

  • the invention relates to a thermal transfer printer and a printing method with multi-color printing function, which is submitted to the Chinese Intellectual Property Office on September 13, 2011, and whose application number is 201110269752.4 The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.
  • BACKGROUND OF THE INVENTION 1.
  • the present invention relates to a thermal transfer printer having a multi-color printing function and a printing method.
  • BACKGROUND OF THE INVENTION In the prior art, thermal transfer printers have been widely used to print multicolor images or text.
  • Chinese Patent Specification CN101927615A discloses a thermal transfer printer having a multi-color printing function. As shown in FIG.
  • the thermal transfer printer includes a printing mechanism, a ribbon mechanism, and a transport roller set, wherein the printing mechanism includes a mating print head 14' and a printing rubber roller 13', and the printing paper passes between the two.
  • the ribbon mechanism includes a dispensing shaft 17b and a recovery shaft 17a, and the unused ribbon is fed from the dispensing shaft 17b between the printhead 14' and the printing blanket 13' and between the printing paper and the printhead 14'. With the printing operation, the ribbon 16' is gradually rewinded around the recovery shaft 17a.
  • a transport roller set is provided downstream of the printing mechanism in the media transport direction for transporting the printing paper upstream of the printing mechanism.
  • the conveying roller set includes a first roller 15a and a second roller 15b which are tangentially fitted, and the printing paper passes between the two.
  • the carbon-coated surface of the thermal transfer printer includes a plurality of colors arranged in a row along the length direction. When printing, the printer sequentially prints text or images of different colors in the face of the ticket.
  • the unused ribbon and the printing paper to be printed pass between the print head 14' and the printing rubber roller 13', the coated surface of the carbon ribbon 16' and the printing paper The surface is contacted, the non-coated surface of the ribbon is in contact with the print head 14', the printing rubber roller 13' is rotated, the printing paper and the ribbon are conveyed downstream of the printing mechanism, the recovery shaft 17a is rotated, and the ribbon of the printing rubber roller 13' is recovered.
  • the control system performs heating control on the heating element of the print head 14', and transfers the dye on the surface of the carbon ribbon onto the printing paper to complete printing.
  • the print head 14' When the first color printing is completed, the print head 14' is separated from the printing rubber roller 13', the conveying roller group is rotated in the reverse direction, the printing rubber roller 13' and the recovery shaft 17a are stopped, and the paper having the first color printing is completed. Backing up to the initial print position, the print head 14' is tangent to the print roller 13' to start printing of the next color.
  • the inventors have found that: in the prior art thermal transfer printer, the printing mechanism and the conveying roller group simultaneously clamp and convey the printing paper during the printing process, and if the transmission mechanism has a transmission error, the conveying speed of the printing mechanism is The conveying speed of the conveying roller group is inconsistent, causing problems of paper smashing or stacking, which causes paper conveying failure.
  • An object of the present invention is to provide a thermal transfer printer having a multi-color printing function capable of avoiding paper conveyance failure such as paper competition or stacking. At the same time, the present invention also provides a printing method of a thermal transfer printer having a multi-color printing function.
  • an aspect of the present invention provides a thermal transfer printer having a multi-color printing function, including: a printing mechanism including a print head assembly and a printing rubber roller, wherein the print head assembly includes printing disposed opposite to the printing rubber roller
  • the printing mechanism has a printing conveyance state in which the printing rubber roller is tangentially matched with the printing head and a separation state in which the printing rubber roller is separated from the printing head;
  • the ribbon mechanism includes a dispensing shaft and a recycling shaft, wherein the carbon ribbon self-issuing shaft, Between the print head and the printing rubber roller, rewinding on the recycling shaft;
  • the conveying roller group includes a first roller and a second roller, wherein the conveying roller group has a printing paper conveying that is tangentially matched with the first roller and the second roller a state and a separated state in which the first roller and the second roller are separated; and a switching device for causing the printing mechanism to be in a printing conveyance state and the conveying roller group in a separated state in the printing mode
  • the switching device is further configured to provide a holding process during the switching from the printing mode to the ejecting mode or the ejecting mode to the printing mode, during the holding process, the printing mechanism and/or the conveying roller set Hold the paper.
  • the above print head assembly includes a fixing plate pivotally attached to the frame for mounting the print head and an elastic member biased toward the fixing plate, wherein the print head on the fixed plate has a tendency to deflect toward the printing rubber roller.
  • the switching device includes: a first curved rod swinging about an axis of the first shaft on the frame, wherein the second roller of the conveying roller set is connected to the first end of the first curved rod, the first curved
  • the rod has a first position that tangentially mates the second roller and the first roller and a second position that separates the second roller from the first roller; the second curved rod swings about an axis of the second shaft on the frame
  • the print head assembly further includes a support portion abutting the first end of the second curved rod, the second curved rod having a third position at which the first end pressing support portion separates the print head from the printing rubber roller And a fourth position for tangentially mating the printhead with the printing blanket, and a double cam comprising a first cam and a second cam coaxially fixedly coupled, the first cam having a second end opposite the second curved lever a matching control wheel surface, the second cam has a control wheel surface abutting against the second end of the first curved rod,
  • control wheel surface of the first cam and the control wheel surface of the second cam further comprise two other combined states: driving the first curved shape after driving the second curved lever to swing from the third position to the fourth position The lever swings to the second position; and drives the second curved lever to swing to the third position after driving the first curved lever to swing from the second position to the first position.
  • the switching device further includes a first elastic member that returns the first curved lever to the second position and a second elastic member that returns the second curved lever to the third position. Further, the position of the above-described printing rubber roller relative to the printhead assembly is movable.
  • the switching device includes: a first curved rod swinging about an axis of the first shaft on the frame, wherein the second roller of the conveying roller set is connected to the first end of the first curved rod, the first curved The rod has a fifth position for tangentially engaging the second roller with the first roller and a sixth position for separating the second roller from the first roller; the second curved rod swings about the axis of the second shaft on the frame
  • the printing rubber roller is connected to the first end of the second curved rod
  • the second curved rod has a seventh position for separating the printing rubber roller from the printing head and an eighth position for matching the printing rubber roller with the printing head
  • a double cam including a first cam and a second cam fixedly coupled to each other, the first cam having a control wheel surface abutting against the second end of the second curved rod, the second cam having the first The second end of the curved rod abuts the mating control wheel surface, wherein the control wheel surface of the first cam and the control wheel surface of the first
  • control tread of the first cam and the control tread of the second cam further comprise two other combined states: driving the first curved bar to swing after driving the second curved bar to the eighth position a six position; and driving the second curved lever to swing to the seventh position after driving the first curved lever to swing to the fifth position.
  • the switching device further includes a third elastic member that returns the first curved lever to the sixth position and a fourth elastic member that returns the second curved lever to the seventh position.
  • the switching device includes a first switching mechanism that causes the printing mechanism to be in a printing conveyance state or a separated state, and a second switching mechanism that causes the conveying roller group to be in a printing paper conveying state or a separated state.
  • a printing method of a thermal transfer printer having a multi-color printing function comprising a printing step and a paper ejection step, wherein: in the printing step, the printing head and the printing glue of the printing mechanism are made The roller is in a print transport state and the first roller and the second roller of the transport roller set are in a separated state, and in the ejecting step In the step, the print head and the printing rubber roller of the printing mechanism are switched from the printing conveyance state to the separated state and the first roller and the second roller of the conveying roller group are switched from the separated state to the printing paper conveying state.
  • the above printing method further includes a first transition step of switching from the printing step to the paper ejection step and a second transition step of switching from the paper ejection step to the printing step, wherein, in the first transition step and the second transition step, Keep the printing mechanism and/or the conveyor roller set to hold the paper at all times to avoid paper turbulence.
  • the first transition step after the first roller and the second roller of the transport roller group are switched from the separated state to the printing paper transport state, the print head and the printing rubber roller of the printing mechanism are switched to the separated state;
  • the first roller and the second roller of the transport roller group are switched to the separated state after the print head of the printing mechanism and the printing rubber roller are switched from the separated state to the printing conveyance state.
  • the thermal transfer printer having a multi-color printing function according to the present invention
  • the printing head and the printing roller hold the paper or the first roller and the second roller of the conveying roller group hold the paper,
  • the problem of paper or pile paper caused by the print head and the printing roller and the first roller and the second roller simultaneously holding the paper are effectively avoided. Therefore, the thermal transfer printer provided by the present invention can avoid paper conveying failure such as paper competition or stacking paper when performing multicolor printing.
  • the paper is always held by the printing head and the printing roller during the switching process and/or is held by the first roller and the second roller, so that the paper can be prevented from being swayed.
  • FIG 1 is a schematic view of a prior art thermal transfer printer
  • FIG. 2 is a schematic view of a thermal transfer printer in a printing mode according to an embodiment of the present invention
  • FIG. 3 is a thermal transfer according to an embodiment of the present invention.
  • FIG. 4a is a schematic view of a first cam of a double cam of a thermal transfer printer according to an embodiment of the present invention;
  • FIG. 4a is a schematic view of a first cam of a double cam of a thermal transfer printer according to an embodiment of the present invention
  • FIG. 4b is a double cam of a thermal transfer printer according to an embodiment of the present invention
  • Figure 2c is a schematic view showing the relative positional relationship between the first cam and the second cam of the double cam of the thermal transfer printer according to an embodiment of the present invention
  • 5 is a schematic diagram showing a transition process of a thermal transfer printer from a printing mode to a paper ejection mode according to an embodiment of the present invention
  • FIG. 6 is a schematic view showing a thermal transfer printer in a paper ejection mode according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a transition process of a thermal transfer printer according to an embodiment of the present invention from a paper ejection mode to a printing mode
  • FIG. 8 is a schematic diagram of a transition process of a thermal transfer printer according to an embodiment of the present invention from a paper ejection mode to a printing mode
  • FIG. 8 is a schematic diagram of a transition process of a thermal
  • FIG. 8 is a schematic view of a multicolor carbon ribbon according to the present invention
  • FIG. 10 is a schematic diagram showing the relative positional relationship between the first cam and the second cam of the double cam of the thermal transfer printer according to another embodiment of the present invention
  • FIG. 11 is another diagram according to the present invention.
  • FIG. 12 is a schematic view of the thermal transfer printer in the eject mode according to another embodiment of the present invention
  • FIG. 13 is in accordance with the present invention.
  • FIG. 2 is a schematic view showing a thermal transfer printer in a printing mode according to a first embodiment of the present invention
  • FIG. 3 is a partial structural isometric view of the thermal transfer printer according to an embodiment of the present invention.
  • the thermal transfer printer includes a printing mechanism 100, a ribbon mechanism 200, a conveying roller set 300, and a switching mechanism 400.
  • the printing mechanism 100 is for printing a predetermined print content on paper.
  • the printing mechanism 100 includes a printhead assembly 11 and a printing blanket 12.
  • the print head assembly 11 is hinged to the frame of the thermal transfer printer through the rotating shaft 13 and is rotatable about the rotating shaft 13; the printing rubber roller 12 is supported by the frame and is freely rotatable about its own axis.
  • the printhead assembly 11 is rotated about the spindle 13, the printhead 111 in the printhead assembly 11 can be separated or tangentially engaged with the print roller 12.
  • the printhead assembly 11 includes a printhead 111, a fixed plate 112, and a resilient member 113.
  • the fixing plate 112 includes a left side plate 112a, a right side plate 112b, and a support plate 112c.
  • the left side plate 112a and the right side plate 112b are disposed in parallel, and the support plate 112c is vertically disposed on the left side plate 112a and the right side plate 112b. between.
  • the print head 111 is fixedly connected to the support plate 112c and located between the left side plate 112a and the right side plate 112b.
  • the rotating shaft 13 is connected to the frame and sequentially penetrates the left side plate 112a and the right side plate 112b away from the end of the print head 111, and is fixed.
  • the plate 112 and the print head 111 can be rotated about the rotation shaft 13 together.
  • the elastic member 113 may be a compression spring, a torsion spring or a leaf spring, etc., at least one, located at one end of the support plate 112c for fixing the print head 111, and located at a side of the support plate 112c away from the print head 111, one end of the elastic member 113 and The support plate 112c is connected, and the other end is connected to the frame.
  • the fixing plate 112 drives the print head 111 to always have a tendency to bias the printing rubber roller 12.
  • the ribbon mechanism 200 includes a dispensing shaft 210 and a recovery shaft 220 disposed axially parallel to the printing blanket 12.
  • the dispensing shaft 210 is used to support the unused carbon ribbon
  • the recovery shaft 220 is used to wind the carbon ribbon released by the dispensing shaft 210 around its outer circumference.
  • the recovery shaft 220 and the printing rubber roller 12 are rotated in the set direction, and the unused carbon ribbon is taken out from the dispensing shaft 210.
  • the ribbon After the ribbon passes between the printing head 111 and the paper, the ribbon is rewinded and wound around the outer circumference of the recovery shaft 220. on.
  • the coated side of the ribbon is in contact with the paper, and the uncoated side of the ribbon is in contact with the printhead 111.
  • the carbon ribbon and paper driving between the printing head 111 and the printing rubber roller 12 are driven to be output downstream of the printing mechanism 100, while the recovery shaft 220 is rotated, and the used carbon ribbon is wound around the outer circumference thereof.
  • the conveying roller set 300 is located upstream of the printing mechanism 100 for conveying the paper upstream of the printing mechanism 100 when the printing head 111 is separated from the printing rubber roller 12, and retracting the paper to the initial position for printing the next one.
  • Kind of color is
  • the conveying roller set 300 includes a first roller 310 and a second roller 320 which are oppositely disposed and respectively located on both sides of the paper, and the first roller 310 and the second roller 320 are disposed axially parallel to the printing rubber roller 12, the first roller 310 and the second roller One of the rollers 320 is supported by the frame, and the other of the two is movably coupled to the frame and is free to rotate about its own axis.
  • One of the first roller 310 and the second roller 320 is a driving roller, and the other of the two rollers is a driven roller.
  • the driving roller rotates to drive the slave roller.
  • the roller rotates to transport the paper between the two to the upstream of the printing mechanism 100.
  • the first roller 310 of the transport roller set 300 is a driven roller, supported by the frame
  • the second roller 320 is a driving roller, which is movably connected with the frame, when the first roller 310 and the second roller 320 are tangentially matched.
  • the switching mechanism 400 includes a double cam 2, a first switching assembly 3 and a second switching assembly 4, and a motor (not shown).
  • the double cam 2 is driven by the motor, and the first roller 310 and the second roller 320 of the transport roller set 300 can be selectively in a tangential fit or separated state through the first switching assembly 3, through the second switching component.
  • the print head 111 of the printing mechanism 100 and the printing rubber roller 12 are alternatively in a tangential fit or separated state.
  • the double cam 2 includes a first cam 21 and a second cam 22 that are coaxially fixedly coupled, and an output shaft of the motor is simultaneously drivingly coupled to the first cam 21 and the second cam 22 for driving the first cam 21 and the second cam 22 Rotate synchronously.
  • 4a is a schematic view of a first cam in a double cam of a thermal transfer printer according to an embodiment of the present invention, as shown in FIG.
  • a curved surface corresponding to a first near repair angle a1 of the first cam 21 is a working surface 21a
  • a curved surface corresponding to the first distal repair angle a2 of the first cam 21 is a second working surface 21b
  • a curved surface corresponding to the first thrusting motion angle a3 of the first cam 21 is a third working surface 21c
  • the curved surface corresponding to the first return movement angle a4 of the first cam 21 is the fourth working surface 21d.
  • 4b is a schematic view of a second cam of the double cam of the thermal transfer printer according to an embodiment of the present invention, as shown in FIG.
  • the curved surface corresponding to the second near repair angle bl of the second cam 22 is The fifth working surface 22a, the curved surface corresponding to the second distal repair angle b2 of the second cam 22 is the sixth working surface 22b, and the curved surface corresponding to the second estimated driving angle b3 of the second cam 22 is the seventh working surface 22c.
  • the curved surface corresponding to the second return movement angle b4 of the second cam 22 is the eighth working surface 22d.
  • 4c is a schematic diagram showing the relative positional relationship between the first cam and the second cam of the double cam of the thermal transfer printer according to an embodiment of the present invention. As shown in FIG.
  • the first near-repair angle a1 of the first cam 21 is laminated with the second far-repair angle b2 of the second cam 22; the first far-repair angle a2 of the first cam 21 and the second cam 22
  • the second near repair angle bl is laminated; the first kick movement angle a3 of the first cam 21 is laminated with the second return movement angle b4 of the second cam 22, and a3>b3; the first return movement of the first cam 21
  • the angle a4 is laminated with the second stroke movement angle b3 of the second cam 22, and a4>b4.
  • the first switching assembly 3 includes a first curved lever 31 and a first shaft 32, wherein the first curved lever 31 is hinged to the frame by a first shaft 32 and is rotatable about the first shaft 32.
  • One end of the first curved lever 31 is connected to the first roller 310 or the second roller 320 of the transport roller group 300, and the other end of the first curved lever 31 (hereinafter referred to as a first acting end 31a) Abutting against the working surface of the second cam 22 of the double cam 2, that is, with the fourth working surface 22a or the sixth working surface 22b or the seventh working surface 22c or the eighth working surface 22d of the second cam 22 One of the abuts.
  • the first curved rod 31 is coupled to the second roller 320, and has a first position for tangentially fitting the second roller 320 and the first roller 310 and a second separating the second roller 320 and the first roller 310. position.
  • the second switching assembly 4 includes a second curved lever 41, a third curved lever 42 and a second shaft 43, wherein the second curved lever 41 and the third curved lever 42 are respectively located on both sides of the printing mechanism 100, regarding printing
  • the mechanism 100 is symmetrically disposed in the width direction.
  • the second curved rod 41 and the third curved rod 42 are both fixedly coupled to the second shaft 43.
  • the second shaft 43 is supported by the frame and is rotatable about its own axis, so the second curved shape
  • the rod 41 and the third curved rod 42 can be synchronously rotated with respect to the frame centering on the second shaft 43.
  • a second working end 41a is disposed at one end of the second curved rod 41, and the second working end 41a abuts the working surface of the first cam 21 of the double cam 2, that is, the first of the first cam 21
  • One of the four working faces of the working face 21a or the second working face 21b or the third working face 21c or the fourth working face 21d abuts, and the other end of the second curved bar 41 is provided with a third acting end 41b
  • the third The active end 41b may be in contact with or separated from the left support portion 112d of the fixed plate 112, wherein the left support portion 112d of the fixed plate 112 is coupled to the left side plate 112a of the fixed plate 112.
  • the second curved lever 41 has a third position that presses the left support portion 112d, separates the print head 111 from the printing rubber roller 12, and a fourth position that causes the print head 111 to tangentially engage the printing rubber roller 12.
  • a fourth acting end 42a is disposed at one end of the third curved rod 42.
  • the fourth acting end 42a When the switching mechanism 400 includes a set of double cams 2, the fourth acting end 42a is suspended, and when the switching mechanism includes two sets of double cams 2, The fourth acting end 42a can abut the working surface of the first cam 21 of the other pair of double cams 2, and the other end of the third curved rod 42 is provided with a fifth acting end 42b, and the fifth acting end 42b can be
  • the right support portion 112e of the fixing plate 112 is in contact with or separated from, and the right support portion 112e of the fixing plate 112 is connected to the right side plate 112b of the fixing plate 112.
  • the third curved rod 42 Since the third curved rod 42 is coaxially fixedly connected with the second curved rod 41, the third curved rod 42 also has a third position for separating the print head 111 from the printing rubber roller 12 and the printing head 111 and the printing glue
  • the fourth position of the roller 12 is tangentially mated, and will not be described herein.
  • the thermal transfer printer is switched between the print mode and the eject mode by the rotation of the double cam 2 of the motor drive switching mechanism 400.
  • the switching mechanism 400 separates the first roller 310 of the transport roller set 300 from the second roller 320, so that the print head 111 is tangentially matched with the printing rubber roller 12; in the paper ejection mode, the switching mechanism 400 causes the conveying roller The first roller 310 of the set 300 is tangentially engaged with the second roller 320 to separate the printhead 111 from the printing blanket 12. As shown in FIG.
  • the double cam 2 of the motor drive switching mechanism 400 rotates, so that the thermal transfer printer is in the printing mode, and at this time, the double cam 2 drives the first a curved shape
  • the rod 31 is in the second position, the first active end 31a abuts the fifth working surface 22a of the second cam 22, and the second roller 320 connected to the first curved rod 31 is separated from the first roller 310; the double cam 2 driving the second curved rod 41 in the fourth position, the second working end 41a abuts the first working surface 21a of the first cam 21, and the fixing plate 112 rotates around the rotating shaft 13 to the printing glue under the action of the elastic member 113.
  • the roller 12 is rotated in the direction to align the print head 111 with the printing rubber roller 12.
  • the printing blanket 12 and the recovery shaft 220 are rotated to convey the paper and the ribbon downstream of the printing mechanism 100, while the printing head 111 generates heat, and the first dye on the ribbon is transferred onto the sheet.
  • the controller of the thermal transfer printer controls the rotation of the motor of the switching mechanism 400 to switch the thermal transfer printer from the printing mode to the eject mode, that is, the print head 111 of the printing mechanism 100 and the printing roller 12 Separating, the first roller 310 and the second roller 320 of the transport roller set 300 are tangentially fitted.
  • FIG. 5 is a schematic diagram showing a transition process of a thermal transfer printer from a printing mode to an eject mode according to an embodiment of the invention.
  • the motor drives the double cam 2 to rotate in the set direction (clockwise direction as shown), and the seventh working surface 22c of the second cam 22 is in contact with the first active end 31a of the first curved lever 31.
  • the second stroke movement angle b3 of the second cam 22 is smaller than the first stroke movement angle a3 of the first cam 21, after the double cam rotates the b3 angle, first passes through the seventh working surface 22c of the second cam 22.
  • Driving the first curved rod in the first position causing the second roller 320 to be tangent to the first roller 310, and then driving the second curved rod 41 and the third curved shape after the double cam continues to rotate (a3-b3)
  • the rod 42 is located at the third position, and the third acting end 41b of the second curved rod 41 and the fifth acting end 42b of the third curved rod 42 respectively lift up the left support portion 112d and the right side of the left side plate 112a of the fixed plate 112
  • the right support portion 112e of the side plate 112b separates the print head 111 from the printing blanket roller 12.
  • the printing head 111 is separated from the printing rubber roller 12. That is, during the switching process, the paper is always held by the print head 111 and the printing rubber roller 12 and/or the first roller 310 and the second roller 320, so that the paper can be prevented from being shaken.
  • the thermal transfer printer is switched from the printing mode to the eject mode, the sheet is nipped by the first roller 310 and the second roller 320 of the conveying roller group 300 at this time.
  • FIG. 6 is a schematic illustration of a thermal transfer printer in a paper ejection mode, in accordance with an embodiment of the present invention.
  • the sixth working surface 22b of the second cam 22 drives the first curved lever 31 to be in the first position, so as to be the first curved lever 31 connected second roller 320 is tangent to first roller 310
  • the second working surface 21b of the first cam 21 drives the second curved rod 41 to be in the third position to separate the print head 111 from the printing rubber roller 12.
  • the thermal transfer printer is in the eject mode, that is, the first roller 310 of the transport roller set 300 is tangent to the second roller 320, and the print head 111 is separated from the printing rubber roller 12, and at this time, the paper is only matched by the tangent A roller 310 and the second roller 320 are clamped, so that the problem of paper smashing or stacking during paper ejection can be avoided.
  • the controller of the thermal transfer printer controls the second roller 320 of the transport roller set 300 to rotate in the reverse direction, driving the first roller 310 to rotate accordingly, and returning the paper to the initial position of printing to be a thermal transfer.
  • the printer is ready to print in the next color.
  • FIG. 7 is a schematic diagram showing a transition process of a thermal transfer printer from a paper ejection mode to a printing mode according to an embodiment of the present invention.
  • the eighth working surface 22d of the second cam 22 is in contact with the first active end 31a of the first curved lever 31, and drives the first curved lever 31 to rotate.
  • the first shaft 32 rotates to move the second roller 320 connected to the first curved rod 31 away from the first roller 310; the second working surface 21d of the first cam 21 and the second function of the second curved rod 41
  • the end 41a contacts, driving the second curved rod 41 and the third curved rod 42 to synchronously rotate relative to the frame about the second shaft 43 so that the third acting end 41b and the third curved rod of the second curved rod 41
  • the fifth action end 42b of the pair 42 moves toward the left support portion 112d of the left side plate 112a of the fixed plate 112 and the right support portion 112e of the right side plate 112b, respectively.
  • the second return movement angle b4 of the second cam 22 is smaller than the first return movement angle a4 of the first cam 21, when the double cam rotates the angle b4, it is first driven by the fourth working surface 21d of the first cam 21.
  • the third acting end 41b of the two curved lever 41 and the fifth acting end 42b of the third curved lever 42 are respectively away from the left support portion 112d of the left side plate 112a of the fixed plate 112 and the right support portion 112e of the right side plate 112b, After the print head 111 is tangentially matched with the printing rubber roller 12, the double cam continues to rotate (a4-b4) the angle, and the second cam 22 drives the first curved rod 31 to continue to rotate, driving the second roller 320 relative to the first roller 310.
  • the paper is always held by the first roller 310 and the second roller 320 until the print head 111 is tangent to the printing roller 12,
  • the second roller 320 is separated from the first roller 310. That is, during the switching, the paper is nipped by the print head 111 with the printing blanket 12 and/or the first roller 310 and the second roller 320, so that paper sway can be avoided.
  • the first switching component 3 may further include a first elastic component, one end of the first elastic component is connected to the frame, and the other end is connected to the first curved bar 31,
  • the first curved lever 31 Under the action of an elastic member, the first curved lever 31 always has a relative frame rotation, so that the second roller 320 of the transport roller set 300 at one end thereof always maintains a tendency to separate from the first roller 310.
  • the first curved rod 31 rotates relative to the frame, and the second roller 320 of the conveying roller set 300 is driven.
  • the switching mechanism 400 may include a set of first switching components 3, and may also include two sets of first switching components 3, one end of the first curved bar 31 when the switching mechanism includes a set of first switching components 3.
  • the switching mechanism 400 Connected to an axially intermediate portion of the first roller 310 or the second roller 320 of the transport roller set 300; when the switching mechanism 400 includes two sets of first switching assemblies 3, the two sets of first switching assemblies 3 are respectively located at the width of the printing mechanism 100 The two sides of the direction are symmetrically disposed, and the first curved bars 31 of the two sets of first switching assemblies 3 are respectively coupled to both ends of the first roller 310 or the second roller 320 of the transport roller group 300. It should be noted that, when the switching mechanism includes two sets of first switching components 3, the switching mechanism 400 may include a set of double cams 2, and may also include two sets of double cams 2.
  • the switching mechanism 400 includes a set of double cams 2
  • the first shafts 32 of the two sets of first switching assemblies 3 are the same part, and the first curved rods 31 of the two sets of first switching assemblies 3 are aligned with the first shaft 32.
  • the fixed connection, while the first shaft 32 is supported by the frame, is rotatable about its own axis, so that the first curved levers 31 of the two sets of first switching assemblies 3 can be rotated synchronously with respect to the frame.
  • the double cam 2 is connected to one of the two sets of first switching assemblies 3, and the first curved shafts 31 of the two sets of first switching assemblies 3 can be synchronously rotated by the first shaft 32, so that the conveying roller group can be made
  • the two ends of the first roller 310 or the second roller 320 of 300 are simultaneously lifted or lowered to make the paper conveyance more stable;
  • the switching mechanism 400 includes two sets of double cams 2, the two sets of double cams are located on both sides of the printing mechanism , the fixed connection is through the rotating shaft 23, at this time, the two sets of the first switching components respectively comprise the first shaft 32, and the two sets of double cams are respectively connected with the two sets of first switching components, and the two sets of double cams rotate synchronously, which can drive two groups of The first curved lever of a switching assembly rotates synchronously with respect to the frame.
  • the second switching component 4 may further include a second elastic component, one end of the second elastic component is connected to the frame, and the other end is connected to the second curved bar 41.
  • the second curved rod 41 Under the action of the two elastic members, the second curved rod 41 always has a rotation relative to the frame, so that the third acting end 41b of the second curved rod 41 moves toward the fixing plate 112, thereby lifting the fixing plate 112.
  • the tendency of the print head 111 to be separated from the printing blanket 12 is trending.
  • the second curved rod 41 rotates relative to the frame, and the second curved rod 41 and the third curved rod 42 overcome the elastic member.
  • the carbon ribbon used in the thermal transfer printer is a multicolor carbon ribbon
  • Fig. 8 is a schematic view of a multicolor ribbon according to the present invention. As shown in FIG. 8, in the longitudinal direction of the ribbon, there are a plurality of colors such as a first color a (such as red), a second color b (such as yellow), and a third color c (such as blue).
  • a thermal transfer printer prints with a multi-color ribbon
  • the first color is printed first
  • the print head is separated from the print roller
  • the transport roller set returns the paper to the home position
  • the second color is printed, and so on.
  • the printer outputs the paper and finishes printing.
  • a two-color carbon ribbon is taken as an example, and the working process of the thermal transfer printer provided by the embodiment is introduced in conjunction with FIG. 2 and FIG. 5 to FIG.
  • the controller of the thermal transfer printer controls the rotation of the motor of the switching mechanism 400 to place the thermal transfer printer in the printing mode. At this time, the print head 111 is tangentially matched with the printing rubber roller 12.
  • the first roller 310 and the second roller 320 of the transport roller set 300 are separated, the printing rubber roller 12 and the recovery shaft 220 are driven to rotate in the clockwise direction, and the printing rubber roller 12 transports the paper and the ribbon downstream of the printing mechanism 100 to recover the shaft.
  • the wrapped carbon ribbon is wound around its outer circumference, and at the same time, the heat generating element of the print head 111 generates heat, and the first color dye coated with the carbon ribbon is transferred onto the paper to form an image or a character.
  • the controller of the thermal transfer printer controls the rotation of the motor of the switching mechanism 400 to switch the thermal transfer printer from the printing mode to the eject mode, wherein, during the switching process, the print head 111 and the printing The rubber roller 12 and/or the first roller 310 and the second roller 320 sandwich the paper, which can effectively prevent the paper from being shaken during switching.
  • the print head 111 is separated from the printing rubber roller 12, the first roller 310 and the second roller 320 of the transport roller group 300 are tangentially fitted to hold the paper, and the second roller 320 is driven to rotate in the counterclockwise direction.
  • the printing rubber roller 12 and the recovery shaft 220 stop rotating, and the paper is conveyed to the upstream direction of the printing mechanism 100 until the printing start position is retracted. At this time, only the first roller 310 and the second roller 320 hold the paper, so that the paper can be avoided. There is a problem with paper or pile paper when the paper is in use. Then, the controller controls the motor of the switching mechanism 400 to continue to rotate, so that the thermal transfer printer is switched from the eject mode to the printing mode, wherein, during the switching process, the print head 111 and the printing roller 12 and/or the first roller 310 are The second roller 320 holds the paper, which also prevents the paper from being shaken.
  • the printing rubber roller 12 and the recovery shaft 220 are driven to rotate in the clockwise direction, the paper is conveyed downstream by the printing rubber roller 12 to the printing mechanism 100, and the recycling shaft 220 uses the used carbon ribbon. Wrapped around the outer circumference thereof, at the same time, the heating element of the printing head 111 generates heat, and the second color dye coated with the carbon ribbon is transferred onto the paper to form an image or text, and the printing is completed, and the printer controls the printing rubber roller 12 to continue to rotate.
  • the paper is fed out of the printer, and during this process, the paper is nipped and conveyed by the tangentially matched print head 111 and the printing rubber roller 12, which also avoids paper jamming or stacking problems.
  • the embodiment provides a thermal transfer printer having a multi-color printing function, by setting a switching mechanism, switching between the print head and the printing rubber roller, or cutting or separating the first roller and the second roller of the conveying roller group.
  • a switching mechanism switching between the print head and the printing rubber roller, or cutting or separating the first roller and the second roller of the conveying roller group.
  • 9 is a schematic structural view of a thermal transfer printer in a printing mode according to another embodiment of the present invention.
  • the present embodiment is different from the previous embodiment in that the second switching assembly 4 supports both ends of the printing rubber roller 12 in this embodiment, and the printing rubber roller 12 is rotatable about its own axis. Under the action of the double cam 2, the second switching assembly 4 drives the printing rubber roller 12 to move relative to the frame, and is tangentially matched or separated from the printing head 111.
  • Figure 10 is a schematic illustration of a duplex cam of a thermal transfer printer in accordance with another embodiment of the present invention.
  • the first near-repair angle a1 of the first cam 21 and the second near-repair angle bl of the second cam 22 are laminated, and the first far-repair angle a2 of the first cam 21 is the same
  • the second distal angle of repair b2 of the two cams 22 is partially laminated; the first stroke movement angle a3 of the first cam 21 is laminated with the second stroke movement angle b3 of the second cam 22, and the first return of the first cam 21
  • the movement angle a4 is laminated with the second return movement angle b4 of the second cam 22, and a3>b4, a4>b3.
  • the first acting end 31a of the first curved lever 31 of the first switching assembly 3 is coupled to the second roller 320 of the transport roller set 300, and the first curved lever 31 has the second roller 320 and the second a fifth position in which one roller 310 is tangentially mated and a sixth position in which the second roller 320 is separated from the first roller 310; one ends of the second curved rod 41 and the third curved rod 42 of the second switching assembly 4 are respectively Connected to both ends of the printing rubber roller 12, the second curved lever 41 and the third curved lever 42 have a seventh position for separating the printing rubber roller 12 from the printing head 111 and align the printing rubber roller 12 with the printing head 111 The eighth position of the match.
  • the controller of the thermal transfer printer controls the rotation of the motor of the switching mechanism 400 to put the thermal transfer printer in the printing mode.
  • the second working surface 21b of the first cam 21 drives the second curved rod 41 in the eighth position, and the printing rubber roller 12 connected to the other end of the second curved rod 41 and the third curved rod 42 is
  • the print head 111 is tangentially fitted, while the fifth working surface 22a of the second cam 22 drives the first curved rod 31 in the sixth position, so that the second roller 320 and the first roller located at the other end of the first curved rod 31 310 separated.
  • the printing rubber roller 12 and the recovery shaft 220 are driven to rotate, the printing rubber roller 12 conveys the paper and the carbon ribbon downstream of the printing mechanism 100, and the recycling shaft 220 winds the used carbon ribbon around the outer circumference thereof, and at the same time, the heating element of the printing head 111 Heat, transfer the ribbon-coated first color dye onto the paper to form an image or text.
  • the controller of the thermal transfer printer controls the rotation of the motor of the switching mechanism 400 to switch the thermal transfer printer from the printing mode to the eject mode, that is, the print head 111 of the printing mechanism 100 and the printing roller 12 Switching from the tangential fit to the separation, the first roller 310 and the second roller 320 of the transport roller set 300 are switched from the separation to the tangent fit.
  • FIG. 11 is a schematic diagram showing a transition process of a thermal transfer printer switching from a printing mode to an eject mode according to another embodiment of the present invention.
  • the motor of the double cam 2 drives the double gear 20 to rotate in the set direction (clockwise direction as shown in the figure), the seventh working surface 22c of the second cam 22 and the first curved rod 31
  • An action end 31a contacts, driving the first curved rod 31 to rotate about the first shaft 32, so that the second roller 321 connected to the first curved rod 31 moves toward the first roller 310, and at the same time, the first cam 21
  • the fourth working surface 21d drives the second curved rod 41 and the third curved rod 42 to rotate about the second shaft 43 to make the printing rubber roller 12 connected to the second curved rod 41 and the third curved rod 42 Move away from the print head 111.
  • the double cam 2 is first driven by the seventh working surface 22c of the second cam 22 after being rotated by the b3 angle.
  • the second roller 310 of the roller set 300 is tangentially engaged with the first roller 310, and after the double cam 2 continues to rotate (a4-b3), the second curved lever is then driven by the fourth working surface 21d of the first cam 21.
  • 41 and the third curved rod 42 drive the printing rubber roller 12 to be separated from the printing head 111.
  • FIG. 12 is a schematic view showing the thermal transfer printer shown in Figure 9 in a paper ejection mode. As shown in FIG.
  • the motor drives the double cam 2 to continue to rotate the set angle
  • the first working surface 21a of the first cam 21 drives the second curved rod 41 in the seventh position to be connected to the second curved rod 41 and
  • the printing rubber roller 12 at the other end of the third curved rod 42 is separated from the printing head 111.
  • the printing head assembly 11 is biased toward the printing rubber roller 12 by the elastic member 113 until it is overlapped on the frame.
  • the print head assembly 11 is in a stable position.
  • the sixth working surface 22b of the second cam 22 drives the first curved lever 31 in the fifth position, and the second roller 320 connected to the other end of the first curved lever 31 is tangentially engaged with the first roller 310.
  • the thermal transfer printer is in the eject mode. That is, the printing rubber roller 12 is separated from the printing head 111, and the first roller 310 of the conveying roller group 300 is tangentially matched with the second roller 320.
  • the thermal transfer printer is in the eject mode, the paper is nipped by the first roller 310 and the second roller 320, and the controller of the thermal transfer printer controls the second roller 320 of the transport roller set 300 to rotate in the reverse direction to drive the first roller. 310 then rotates to return the paper to the original print position.
  • FIG. 13 is a schematic diagram showing a transition process of a thermal transfer printer from a paper ejection mode to a printing mode according to another embodiment of the present invention. As shown in FIG.
  • the motor continues to drive the double cam 2 to rotate, the third working surface 21c of the first cam 21 abuts the third contact end 41a of the second curved rod 41, and drives the second curved rod 41 and
  • the third curved rod 42 rotates relative to the frame to move the printing rubber roller 12 connected to the second curved rod 41 and the third curved rod 42 toward the printing head 111, and at the same time, the eighth working surface of the second cam 22 22d abuts the first contact end 31a of the first curved rod 31, and drives the first curved rod 31 to rotate relative to the frame, so that the second roller 320 connected to the first curved rod 31 is away from the first roller 310. Move in direction.
  • the double cam 2 rotates the b4 angle, first by the third working surface 21c of the first cam 21 to drive the second After the curved rod 41 and the third curved rod 42 are rotated to make the printing rubber roller 12 tangential to the printing head, the double cam 2 continues to rotate (a3-b4), and then passes through the eighth working surface 22d of the second cam 22.
  • the first curved lever 31 is driven to rotate so that the printing rubber roller 12 is tangent to the printing head 111.
  • the paper is always held by the first roller 310 and the second roller 320 until the printing roller 12 is tangent to the printing head 111.
  • the second roller 320 is separated from the first roller 310, that is, during the switching process, the paper is always held by the print head 111 and the printing rubber roller 12 and/or the first roller 310 and the second roller 320, so that paper conveyance can be avoided.
  • the printing rubber roller moves relative to the printing head, and the printing head and the printing rubber roller and/or the first roller and the second roller hold the paper during the switching process, and when the paper is fed or unloaded.
  • the separation and tangential cooperation of the print head of the printing mechanism and the printing rubber roller can be individually controlled by a switching mechanism, and the separation and tangential fit of the first roller and the second roller of the conveyor roller group can be individually Controlled by another switching mechanism, the combined state of the two switching mechanisms and the sequence of switching can be controlled by the controller.
  • the switching mechanism is implemented by a cam swing mechanism. In other embodiments, the switching mechanism can be implemented by an electric cylinder, a cam push rod mechanism, or the like.
  • the thermal transfer printer provided by the invention can avoid the paper sway during the paper conveying process during the multi-color printing, and can avoid the problems of paper smashing, stacking paper, etc., and improve the thermal transfer.
  • the reliability of the printer is only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Electronic Switches (AREA)
  • Handling Of Sheets (AREA)

Abstract

公开了一种具有多色打印功能的热转印打印机和打印方法。该热转印打印机包括：打印机构（100），包括打印头（111）和打印胶棍（12），具有打印胶辊与打印头相切配合的打印输送状态和打印胶辊与打印头分离的分离状态；碳带机构（200），包括发放轴（210）和回收轴（320）；输送辊组（300），包括第一辊（310）和第二辊(320），具有第一辊与第二辊相切配合的打印纸输送状态和第一辊与第二辊分离的分离状态；以及切换装置(400），用于在打印模式时使打印机构处于打印输送状态并且使输送辊组处于分离状态，在退纸模式时使打印机构由打印送状态切换至分离状态并且使输送辊组由分离状态切换至打印纸输送状态。该热转印打印机有效避免了由于打印头与打印胶辊和第一辊与第二辊同时夹持纸张时产生的争纸或者堆纸问题。

Description

具有多色打印功能的热转印打印机和打印方法 本申请要求 2011年 9月 13日提交至中国知识产权局的、申请号为 201110269752.4、 名称为 "具有多色打印功能的热转印打印机和打印方法" 的中国发明专利申请的优先 权， 其全部公开内容结合于此供参考。 技术领域 本发明涉及具有多色打印功能的热转印打印机和打印方法。 背景技术 现有技术中， 热转印打印机打印多色图像或文字已经广泛应用。 中国专利说明书 CN101927615A公开了一种具有多色打印功能的热转印打印机。 如图 1所示， 热转印打印机包括打印机构、 碳带机构， 以及输送辊组， 其中打印机构 包括相互配合的打印头 14'和打印胶辊 13'， 打印纸在两者之间穿过； 碳带机构包括发 放轴 17b和回收轴 17a， 未使用的碳带由发放轴 17b送至打印头 14'和打印胶辊 13'之 间， 且位于打印纸和打印头 14'之间， 随着打印操作， 碳带 16'逐渐回卷缠绕在回收轴 17a上。 沿介质输送方向， 在打印机构的下游还设置有输送辊组， 用于向打印机构上游输 送打印纸张。 输送辊组包括相切配合的第一辊 15a和第二辊 15b， 打印纸从两者之间 穿过。 热转印打印机使用的碳带涂层面包括沿长度方向依次定长排列的多种颜色， 打印 时， 打印机依次打印票面中不同颜色的文字或图像。 当打印机在进行第一种颜色打印 时， 未使用的碳带和待打印的打印纸从打印头 14'与打印胶辊 13'之间穿过， 碳带 16' 的涂层面与打印纸的表面接触，碳带的非涂层面与打印头 14'接触，打印胶辊 13'转动， 向打印机构下游输送打印纸和碳带， 回收轴 17a转动， 回收打印胶辊 13'输出的碳带， 同时，控制系统对打印头 14'的发热元件进行加热控制，把碳带涂层面上的染料转印到 打印纸上完成打印。 当完成第一种颜色打印后， 打印头 14'与打印胶辊 13'分离， 输送辊组反向转动， 打印胶辊 13'和回收轴 17a停止转动，将已完成第一种颜色打印的纸张后退至初始打印 位置， 打印头 14'与打印胶辊 13'相切， 开始下一种颜色的打印。 本发明人发现： 现有技术中的热转印打印机在打印过程中， 打印机构与输送辊组 同时夹住并输送打印纸， 若其传动机构有传动误差， 则会因打印机构的输送速度与输 送辊组的输送速度不一致而造成争纸或堆纸的问题， 从而引起纸张输送故障。 发明内容 本发明的目的在于提供一种能够避免争纸或堆纸等纸张输送故障的具有多色打印 功能的热转印打印机。 同时本发明还提供了一种具有多色打印功能的热转印打印机的 打印方法。 为此， 本发明一方面提供了一种具有多色打印功能的热转印打印机， 包括： 打印 机构， 包括打印头组件和打印胶辊， 其中， 打印头组件包括与打印胶辊相对设置的打 印头， 打印机构具有打印胶辊与打印头相切配合的打印输送状态及打印胶辊与打印头 相分离的分离状态； 碳带机构， 包括发放轴和回收轴， 其中， 碳带自发放轴、 经过打 印头和打印胶辊之间、 回卷在回收轴上； 输送辊组， 包括第一辊和第二辊， 其中， 输 送辊组具有第一辊与第二辊相切配合的打印纸输送状态及第一辊与第二辊相分离的分 离状态； 以及切换装置， 用于在打印模式时使打印机构处于打印输送状态并且使输送 辊组处于分离状态； 在退纸模式时使打印机构由打印输送状态切换至分离状态并且使 输送辊组由分离状态切换至打印纸输送状态。 进一步地， 上述切换装置还用于在由打印模式切换至退纸模式或者由退纸模式切 换至打印模式的切换过程中， 提供一保持过程， 在保持过程中， 打印机构和 /或输送辊 组夹持纸张。 进一步地， 上述打印头组件包括枢接在机架上用于安装打印头的固定板和向固定 板偏压的弹性元件， 其中， 固定板上的打印头具有向打印胶辊方向偏转的趋势。 进一步地， 上述切换装置包括： 第一曲形杆， 围绕机架上的第一轴的轴线摆动， 其中， 输送辊组的第二辊与第一曲形杆的第一端连接， 第一曲形杆具有使第二辊和第 一辊相切配合的第一位置及使第二辊和第一辊分离的第二位置； 第二曲形杆， 围绕机 架上的第二轴的轴线摆动， 其中， 打印头组件还包括与第二曲形杆的第一端相抵接的 支持部， 第二曲形杆具有其第一端抵压支持部使打印头与打印胶辊分离的第三位置及 使打印头与打印胶辊相切配合的第四位置， 以及双联凸轮， 包括同轴固定连接的第一 凸轮和第二凸轮， 第一凸轮具有与第二曲形杆的第二端抵接配合的控制轮面， 第二凸 轮具有与第一曲形杆的第二端抵接配合的控制轮面， 其中， 第一凸轮的控制轮面和第 二凸轮的控制轮面包括两种组合状态： 使第一曲形杆处于第一位置并且使第二曲形杆 处于第三位置； 使第一曲形杆处于第二位置并且使第二曲形杆处于第四位置。 进一步地， 上述第一凸轮的控制轮面和第二凸轮的控制轮面还包括另外两种组合 状态： 在驱使第二曲形杆由第三位置摆动至第四位置之后再驱使第一曲形杆摆动至第 二位置； 以及在驱使第一曲形杆由第二位置摆动至第一位置之后再驱使第二曲形杆摆 动至第三位置。 进一步地， 上述切换装置还包括使第一曲形杆回复至第二位置的第一弹性元件和 使第二曲形杆回复至第三位置的第二弹性元件。 进一步地， 上述打印胶辊相对于打印头组件的位置是可移动的。 进一步地， 上述切换装置包括： 第一曲形杆， 围绕机架上的第一轴的轴线摆动， 其中， 输送辊组的第二辊与第一曲形杆的第一端连接， 第一曲形杆具有使第二辊与第 一辊相切配合的第五位置及使第二辊与第一辊分离的第六位置； 第二曲形杆， 围绕机 架上的第二轴的轴线摆动， 其中， 打印胶辊与第二曲形杆的第一端连接， 第二曲形杆 具有使打印胶辊与打印头分离的第七位置及使打印胶辊与打印头相切配合的第八位 置； 以及双联凸轮， 包括同轴固定连接的第一凸轮和第二凸轮， 第一凸轮具有与第二 曲形杆的第二端抵接配合的控制轮面， 第二凸轮具有与第一曲形杆的第二端抵接配合 的控制轮面， 其中， 第一凸轮的控制轮面和第二凸轮的控制轮面包括两种组合状态： 使第一曲形杆处于第五位置并且使第二曲形杆处于第七位置； 使第一曲形杆处于第六 位置并且使第二曲形杆处于第八位置。 进一步地， 上述第一凸轮的控制轮面和第二凸轮的控制轮面还包括另外两种组合 状态： 在驱使第二曲形杆摆动至第八位置之后再驱使第一曲形杆摆动至第六位置； 以 及在驱使第一曲形杆摆动至第五位置之后再驱使第二曲形杆摆动至第七位置。 进一步地， 上述切换装置还包括使第一曲形杆回复至第六位置的第三弹性元件和 使第二曲形杆回复至第七位置的第四弹性元件。 进一步地， 上述切换装置包括使打印机构处于打印输送状态或分离状态的第一切 换机构、 以及使输送辊组处于打印纸输送状态或分离状态的第二切换机构。 根据本发明的另一方面， 提供了一种具有多色打印功能的热转印打印机的打印方 法， 包括打印步骤和退纸步骤， 其中： 在打印步骤中， 使打印机构的打印头和打印胶 辊处于打印输送状态并且使输送辊组的第一辊和第二辊处于分离状态， 以及在退纸步 骤中， 使打印机构的打印头和打印胶辊由打印输送状态切换至分离状态并且使输送辊 组的第一辊和第二辊由分离状态切换至打印纸输送状态。 进一步地， 上述打印方法还包括由打印步骤切换至退纸步骤的第一过渡步骤和由 退纸步骤切换至打印步骤的第二过渡步骤，其中，在第一过渡步骤和第二过渡步骤中， 使打印机构和 /或输送辊组始终夹持纸张、 以避免纸张窜动。 进一步地， 在上述第一过渡步骤中， 在输送辊组的第一辊和第二辊由分离状态切 换至打印纸输送状态后再使打印机构的打印头和打印胶辊切换至分离状态； 在上述第 二过渡步骤中， 在打印机构的打印头和打印胶辊由分离状态切换至打印输送状态后再 使输送辊组的第一辊和第二辊切换至分离状态。 根据本发明的具有多色打印功能的热转印打印机， 在打印模式或者退纸模式时， 打印头与打印胶辊夹持纸张或者输送辊组的第一辊与第二辊夹持纸张， 因此有效地避 免了由于打印头与打印胶辊和第一辊与第二辊同时夹持纸张产生的争纸或者堆纸问 题。 因此， 本发明提供的热转印打印机在进行多色打印时能够避免争纸或者堆纸等纸 张输送故障。 另外， 根据本发明的热转印打印机， 在切换过程中， 纸张始终被打印头 与打印胶辊夹持和 /或被第一辊与第二辊夹持， 因此可以避免纸张窜动。 除了上面所描述的目的、 特征、 和优点之外， 本发明具有的其它目的、 特征、 和 优点， 将结合附图作进一步详细的说明。 附图说明 构成本说明书的一部分、 用于进一步理解本发明的附图示出了本发明的优选实施 例， 并与说明书一起用来说明本发明的原理。 图中： 图 1是现有技术的热转印打印机的示意图； 图 2是根据本发明一实施例的热转印打印机处于打印模式的示意图； 图 3是根据本发明一实施例的热转印打印机局部结构轴测图； 图 4a是根据本发明一实施例的热转印打印机的双联凸轮中第一凸轮的示意图； 图 4b根据本发明一实施例的热转印打印机的双联凸轮中第二凸轮的示意图； 图 4c 是根据本发明一实施例的热转印打印机的双联凸轮的第一凸轮和第二凸轮 的相对位置关系示意图； 图 5是根据本发明一实施例的热转印打印机由打印模式向退纸模式切换的过渡过 程示意图； 图 6是根据本发明一实施例的热转印打印机处于退纸模式的示意图； 图 7是根据本发明一实施例的热转印打印机由退纸模式向打印模式切换的过渡过 程示意图； 图 8是根据本发明的多色碳带的示意图； 图 9是根据本发明另一实施例的热转印打印机处于打印模式的示意图； 图 10 是根据本发明另一实施例的热转印打印机的双联凸轮的第一凸轮与第二凸 轮的相对位置关系示意图； 图 11 是根据本发明另一实施例的热转印打印机由打印模式向退纸模式切换的过 渡过程示意图； 图 12是根据本发明另一实施例的热转印打印机处于退纸模式的示意图； 以及 图 13 是根据本发明另一实施例的热转印打印机由退纸模式向打印模式切换的过 渡过程示意图。 附图标记说明
100打印机构 200碳带机构
300输送辊组 400切换机构
11打印头组件 12打印胶辊
13转轴 111打印头
112固定板 113弹性元件
112a左侧板 112b右侧板
112c支撑板 112d左支持部
112e右支持部 210发放轴
220回收轴 310第一辊 320第二辊 2双联凸轮
3第一切换组件 4第二切换组件
21第一凸轮 22第二凸轮
21a第一工作面 21b第二工作面
21c第三工作面 21d第四工作面
22a第五工作面 22b第六工作面
22c第七工作面 22d第八工作面
31第一曲形杆 32第一轴
31a第一作用端 41第二曲形杆
42第三曲形杆 43第二轴
41a第二作用端 41b 第三作用端
42a第四作用端
42b第五作用端。 具体实施方式 以下结合附图对本发明的实施例进行详细说明， 但是本发明可以由权利要求限定 和覆盖的多种不同方式实施。 图 2是根据本发明第一实施例的热转印打印机处于打印模式的示意图， 图 3是根 据本发明一实施例的热转印打印机的局部结构轴测图。 如图 2和图 3所示， 热转印打 印机包括打印机构 100、 碳带机构 200、 输送辊组 300和切换机构 400。 打印机构 100用于在纸张上打印预先设定的打印内容。 打印机构 100包括打印头 组件 11和打印胶辊 12。 其中， 打印头组件 11通过转轴 13与热转印打印机的机架铰 接， 可以绕转轴 13转动； 打印胶辊 12由机架支撑， 可以绕自身轴线自由转动。 当打 印头组件 11绕转轴 13转动时， 打印头组件 11中的打印头 111可以与打印胶辊 12分 离或者相切配合。 具体地， 打印头组件 11包括打印头 111、 固定板 112、 以及弹性元件 113。 其中， 固定板 112包括左侧板 112a、 右侧板 112b以及支撑板 112c， 其中， 左侧板 112a和右 侧板 112b平行设置， 支撑板 112c垂直设置在左侧板 112a和右侧板 112b之间。 打印 头 111与支撑板 112c固定连接， 且位于左侧板 112a和右侧板 112b之间， 转轴 13与 机架连接并依次贯穿左侧板 112a和右侧板 112b远离打印头 111 的一端， 固定板 112 与打印头 111可以一起绕转轴 13转动。 弹性元件 113可以为压簧、 扭簧或者板簧等， 数量至少为一个， 位于支撑板 112c 固定打印头 111的一端， 且位于支撑板 112c远离打印头 111的一侧， 弹性元件 113的 一端与支撑板 112c连接， 另一端与机架连接， 在弹性元件 113的作用下， 固定板 112 带动打印头 111始终存在向打印胶辊 12偏压的运动趋势。 当打印胶辊 12沿设定方向转动时， 沿纸张输送方向， 可以将位于打印头 111和打 印胶辊 12之间的纸张和碳带向打印机构 100下游输送。 碳带机构 200包括平行于打印胶辊 12轴向设置的发放轴 210和回收轴 220。其中， 发放轴 210用于支撑未用过的碳带， 回收轴 220用于将由发放轴 210释放的碳带缠绕 在其外周上。 具体地， 回收轴 220和打印胶辊 12按设定方向转动， 将未使用的碳带从发放轴 210引出， 碳带经过打印头 111和纸张之间后， 回卷缠绕在回收轴 220的外周上。 碳 带的涂层面与纸张接触， 碳带的非涂层面与打印头 111接触。 当打印胶辊 12转动时， 驱动位于打印头 111和打印胶辊 12之间的碳带和纸张向打印机构 100的下游输出，同 时回收轴 220转动， 将用过的碳带缠绕在其外周上。 沿纸张输送方向， 输送辊组 300位于打印机构 100的上游， 用于在打印头 111相 对打印胶辊 12分离时将纸张向打印机构 100上游输送，使纸张回退到初始位置， 以便 打印下一种颜色。 输送辊组 300包括相对设置且分别位于纸张两侧的第一辊 310和第二辊 320， 第 一辊 310和第二辊 320平行于打印胶辊 12轴向设置，第一辊 310和第二辊 320两者中 的一个由机架支撑， 两者中的另一个与机架活动连接， 均可以绕自身轴线自由转动。 第一辊 310和第二辊 320两者中的一个为主动辊， 两者中的另一个为从动辊， 当 第一辊 310和第二辊 320相切配合时， 主动辊转动带动从动辊转动， 将位于两者之间 的纸张向打印机构 100上游输送。 本实施例中输送辊组 300的第一辊 310为从动辊， 由机架支撑， 第二辊 320为主 动辊， 与机架活动连接， 当第一辊 310与第二辊 320相切配合， 第二辊 320转动时， 带动第一辊 310随之转动， 可以将位于两者之间的纸张向打印机构 100上游输送。 切换机构 400包括双联凸轮 2、第一切换组件 3和第二切换组件 4， 以及电机（图 中未绘出）。 其中， 双联凸轮 2在电机的驱动下， 可以通过第一切换组件 3使输送辊组 300的 第一辊 310和第二辊 320择一地处于相切配合或者分离状态， 通过第二切换组件 4使 打印机构 100的打印头 111与打印胶辊 12择一地处于相切配合或者分离状态。 双联凸轮 2包括同轴固定连接的第一凸轮 21和第二凸轮 22， 电机的输出轴同时 与第一凸轮 21和第二凸轮 22传动连接， 用于驱动第一凸轮 21和第二凸轮 22同步转 动。 图 4a是根据本发明一实施例的热转印打印机的双联凸轮中的第一凸轮的示意图， 如图 4a所示， 与第一凸轮 21的第一近修止角 al对应的曲面为第一工作面 21a， 与第 一凸轮 21的第一远修止角 a2对应的曲面为第二工作面 21b， 与第一凸轮 21的第一推 程运动角 a3对应的曲面为第三工作面 21c， 与第一凸轮 21的第一回程运动角 a4对应 的曲面为第四工作面 21d。 图 4b是根据本发明一实施例的热转印打印机的双联凸轮中的第二凸轮的示意图， 如图 4b所示， 与第二凸轮 22的第二近修止角 bl对应的曲面为第五工作面 22a， 与第 二凸轮 22的第二远修止角 b2对应的曲面为第六工作面 22b， 与第二凸轮 22的第二推 程运动角 b3对应的曲面为第七工作面 22c， 与第二凸轮 22的第二回程运动角 b4对应 的曲面为第八工作面 22d。 图 4c 是根据本发明一实施例的热转印打印机的双联凸轮的第一凸轮和第二凸轮 的相对位置关系示意图。 如图 4c所示， 第一凸轮 21 的第一近修止角 al与第二凸轮 22的第二远修止角 b2层叠； 第一凸轮 21的第一远修止角 a2与第二凸轮 22的第二近 修止角 bl层叠;第一凸轮 21的第一推程运动角 a3与第二凸轮 22的第二回程运动角 b4 层叠， 且 a3>b3 ; 第一凸轮 21的第一回程运动角 a4与第二凸轮 22的第二推程运动角 b3层叠， 且 a4>b4。 第一切换组件 3包括第一曲形杆 31和第一轴 32， 其中， 第一曲形杆 31通过第一 轴 32与机架相铰接， 可以绕第一轴 32转动。 第一曲形杆 31 的一端与输送辊组 300 的第一辊 310或第二辊 320连接，第一曲形杆 31的另一端（以下称为第一作用端 31a) 与双联凸轮 2的第二凸轮 22的工作曲面抵接， 即与第二凸轮 22的第五工作面 22a或 第六工作面 22b或第七工作面 22c或第八工作面 22d四个工作面中的一个抵接。 本实 施例中第一曲形杆 31与第二辊 320连接，具有使第二辊 320和第一辊 310相切配合的 第一位置及使第二辊 320和第一辊 310分离的第二位置。 第二切换组件 4包括第二曲形杆 41、 第三曲形杆 42和第二轴 43， 其中第二曲形 杆 41和第三曲形杆 42分别位于打印机构 100的两侧， 关于打印机构 100宽度方向对 称设置， 第二曲形杆 41和第三曲形杆 42均与第二轴 43固定连接， 而第二轴 43由机 架支撑， 可以绕自身轴线转动， 因此第二曲形杆 41和第三曲形杆 42可以以第二轴 43 为中心相对机架同步转动。 其中， 在第二曲形杆 41的一端设置有第二作用端 41a， 第二作用端 41a与双联凸 轮 2的第一凸轮 21的工作曲面抵接， 即可以与第一凸轮 21的第一工作面 21a或第二 工作面 21b或第三工作面 21c或第四工作面 21d四个工作面中的一个抵接， 第二曲形 杆 41的另一端设置有第三作用端 41b， 第三作用端 41b可以与固定板 112的左支持部 112d接触或者分离， 其中， 固定板 112的左支持部 112d与固定板 112的左侧板 112a 连接。 第二曲形杆 41具有抵压左支持部 112d， 使打印头 111与打印胶辊 12分离的第 三位置及使打印头 111与打印胶辊 12相切配合的第四位置。 其中， 在第三曲形杆 42的一端设置第四作用端 42a， 当切换机构 400包括一组双 联凸轮 2时， 第四作用端 42a悬空， 当切换机构包括两组双联凸轮 2时， 第四作用端 42a可以与一组另一双联凸轮 2中的第一凸轮 21的工作曲面抵接， 第三曲形杆 42的 另一端设置有第五作用端 42b， 第五作用端 42b可与固定板 112的右支持部 112e接触 或分离， 其中， 固定板 112的右支持部 112e与固定板 112的右侧板 112b连接。 由于 第三曲形杆 42与第二曲形杆 41同轴固定连接，因此第三曲形杆 42同样具有使打印头 111与打印胶辊 12分离的第三位置及使打印头 111与打印胶辊 12相切配合的第四位 置， 在此不再赘述。 通过电机驱动切换机构 400的双联凸轮 2转动， 使热转印打印机在打印模式和退 纸模式之间切换。 其中， 在打印模式， 切换机构 400使输送辊组 300的第一辊 310与 第二辊 320分离， 使打印头 111与打印胶辊 12相切配合； 在退纸模式， 切换机构 400 使输送辊组 300的第一辊 310与第二辊 320相切配合，使打印头 111与打印胶辊 12分 离。 如图 2所示， 热转印打印机在打印第一种颜色时， 首先， 电机驱动切换机构 400 的双联凸轮 2转动， 使热转印打印机处于打印模式， 此时， 双联凸轮 2驱动第一曲形 杆 31处于第二位置， 其第一作用端 31a与第二凸轮 22的第五工作面 22a抵接， 与第 一曲形杆 31连接的第二辊 320与第一辊 310分离； 双联凸轮 2驱动第二曲形杆 41处 于第四位置， 其第二作用端 41a与第一凸轮 21的第一工作面 21a抵接， 固定板 112在 弹性元件 113的作用下， 绕转轴 13向打印胶辊 12方向转动， 使打印头 111与打印胶 辊 12相切配合。 接着， 打印胶辊 12和回收轴 220转动， 向打印机构 100下游输送纸 张和碳带， 同时打印头 111发热， 将碳带上的第一种染料转印到纸张上。 完成第一种颜色打印后， 热转印打印机的控制器控制切换机构 400的电机转动， 使热转印打印机由打印模式向退纸模式切换， 即打印机构 100的打印头 111与打印胶 辊 12分离， 输送辊组 300的第一辊 310和第二辊 320相切配合。 图 5是根据本发明一实施例的热转印打印机由打印模式向退纸模式切换的过渡过 程示意图。 如图 5所示， 电机驱动双联凸轮 2按设定方向转动 （如图中顺时针方向）， 第二凸轮 22的第七工作面 22c与第一曲形杆 31的第一作用端 31a接触， 驱动第一曲 形杆 31绕第一轴 32转动， 使与第一曲形杆 31连接的第二辊 320向靠近第一辊 310 方向移动； 第一凸轮 21的第三工作面 21c与第二曲形杆 41的第二作用端 41a接触， 驱动第二曲形杆 41和第三曲形杆 42以第二轴 43为中心同步相对机架转动，使第二曲 形杆 41的第三作用端 41b和第三曲形杆 42的第五作用端 42b分别向靠近固定板 112 的左侧板 112a的左支持部 112d和右侧板 112b的右支持部 112e方向移动。 由于第二凸轮 22的第二推程运动角 b3小于第一凸轮 21的第一推程运动角 a3， 因此， 当双联凸轮转动 b3角度后， 首先通过第二凸轮 22的第七工作面 22c驱动第一 曲形杆位于第一位置，使第二辊 320与第一辊 310相切，接着双联凸轮继续转动 ( a3-b3 ) 角度后，驱动第二曲形杆 41和第三曲形杆 42位于第三位置，第二曲形杆 41的第三作 用端 41b和第三曲形杆 42的第五作用端 42b分别顶起固定板 112的左侧板 112a的左 支持部 112d和右侧板 112b的右支持部 112e，使打印头 111与打印胶辊 12分离。这样， 在打印头 111与打印胶辊 12由相切配合到分离的切换过程中，纸张被第一辊 310和第 二辊 320夹持后， 打印头 111与打印胶辊 12才分离。 即切换过程中， 纸张始终被打印 头 111与打印胶辊 12和 /或第一辊 310与第二辊 320夹持， 因此可以避免纸张窜动。 当热转印打印机由打印模式向退纸模式切换完成后， 此时纸张被输送辊组 300的 第一辊 310和第二辊 320夹持。 图 6是根据本发明一实施例的热转印打印机处于退纸模式的示意图。如图 6所示， 随着电机驱动双联凸轮 2顺时针转动设定角度，第二凸轮 22的第六工作面 22b驱动第 一曲形杆 31位于第一位置， 使与第一曲形杆 31连接的第二辊 320与第一辊 310相切 配合；第一凸轮 21的第二工作面 21b驱动第二曲形杆 41位于第三位置，使打印头 111 与打印胶辊 12分离。 此时热转印打印机处于退纸模式， 即输送辊组 300的第一辊 310 与第二辊 320相切， 打印头 111与打印胶辊 12分离， 此时， 纸张只由相切配合的第一 辊 310和第二辊 320夹持， 因此， 可以避免退纸时争纸或者堆纸的问题。 当到达退纸模式后， 热转印打印机的控制器控制输送辊组 300的第二辊 320反向 转动， 驱动第一辊 310随之转动， 将纸张退回到打印初始位置后， 为热转印打印机进 行下一种颜色的打印做好准备。 当退纸完成后， 热转印打印机的控制器控制热转印打印机由退纸模式切换至打印 模式。 图 7是根据本发明一实施例的热转印打印机由退纸模式向打印模式切换的过渡过 程示意图。如图 7所示， 随着电机继续驱动双联凸轮 2转动， 第二凸轮 22的第八工作 面 22d与第一曲形杆 31的第一作用端 31a接触，驱动第一曲形杆 31绕第一轴 32转动， 使与第一曲形杆 31连接的第二辊 320向远离第一辊 310方向移动； 第一凸轮 21的第 四工作面 21d与第二曲形杆 41的第二作用端 41a接触， 驱动第二曲形杆 41和第三曲 形杆 42以第二轴 43为中心同步相对机架转动， 使第二曲形杆 41 的第三作用端 41b 和第三曲形杆 42的第五作用端 42b分别向远离固定板 112的左侧板 112a的左支持部 112d和右侧板 112b的右支持部 112e方向移动。 由于第二凸轮 22的第二回程运动角 b4小于第一凸轮 21的第一回程运动角 a4， 因此， 当双联凸轮转动 b4角度后， 首先通过第一凸轮 21的第四工作面 21d驱动第二 曲形杆 41的第三作用端 41b和第三曲形杆 42的第五作用端 42b分别远离固定板 112 的左侧板 112a的左支持部 112d和右侧板 112b的右支持部 112e，使打印头 111与打印 胶辊 12相切配合之后， 双联凸轮继续转动 （a4-b4) 角度， 第二凸轮 22驱动第一曲形 杆 31继续转动， 带动第二辊 320相对第一辊 310分离。 这样， 在打印头 111与打印胶辊 12由分离到相切配合的切换过程中， 纸张一直被 第一辊 310和第二辊 320夹持， 直至打印头 111与打印胶辊 12相切后， 第二辊 320才 相对第一辊 310分离。 即切换过程中， 纸张被打印头 111与打印胶辊 12和 /或第一辊 310与第二辊 320夹持， 因此可以避免纸张窜动。 优选地， 在本发明提供的其他实施例中， 第一切换组件 3还可以包括第一弹性元 件， 第一弹性元件的一端与机架连接， 另一端与第一曲形杆 31连接， 在第一弹性元件 的作用下，第一曲形杆 31始终具有相对机架转动，使位于其一端的输送辊组 300的第 二辊 320始终保持相对第一辊 310分离的运动趋势。 这样，在打印模式时，在第一弹性元件和第一曲形杆 31的自身重力两者共同作用 下， 第一曲形杆 31相对机架转动， 带动输送辊组 300的第二辊 320向远离第一辊 310 的方向移动， 使第二辊 320相对第一辊 310分离。 在退纸模式时， 在第二凸轮 22的第六工作面 22b的作用下， 第一曲形杆 31克服 第一弹性元件的弹力作用相对机架转动， 使第二辊 320与第一辊 310相切配合。 通过 设置第一弹性元件， 使输送辊组 300的第一辊 310和第二辊 320分离更加可靠。 需要说明的是， 切换机构 400可以包括一组第一切换组件 3， 也可以包括两组第 一切换组件 3， 当切换机构包括一组第一切换组件 3时， 第一曲形杆 31的一端与输送 辊组 300的第一辊 310或第二辊 320的轴向中间部位连接； 当切换机构 400包括两组 第一切换组件 3时， 该两组第一切换组件 3分别位于打印机构 100宽度方向的两侧对 称设置， 该两组第一切换组件 3的第一曲形杆 31分别与输送辊组 300的第一辊 310 或第二辊 320的两端连接。 需要说明的是， 当切换机构包括两组第一切换组件 3时， 切换机构 400可以包括 一组双联凸轮 2， 也可以包括两组双联凸轮 2。 当切换机构 400包括一组双联凸轮 2时，两组第一切换组件 3的第一轴 32为同一 个零件， 两组第一切换组件 3的第一曲形杆 31均与第一轴 32固定连接， 而第一轴 32 由机架支撑，可以绕自身轴向转动， 因此两组第一切换组件 3的第一曲形杆 31可以相 对机架同步转动。 双联凸轮 2与两组第一切换组件 3中的一组连接，通过第一轴 32可以使两组第一 切换组件 3的两个第一曲形杆 31 同步转动， 从而可以使输送辊组 300的第一辊 310 或第二辊 320的两端同时被抬起或放下， 使纸张输送更加平稳； 当切换机构 400包括 两组双联凸轮 2时， 两组双联凸轮位于打印机构两侧， 通过转轴 23固定连接， 此时两 组第一切换组件分别包括第一轴 32， 两组双联凸轮分别与两组第一切换组件连接， 两 组双联凸轮同步转动， 可以驱动两组第一切换组件的第一曲形杆相对机架同步转动。 优选地， 在本发明提供的其他实施例中， 第二切换组件 4还可以包括第二弹性元 件， 第二弹性元件的一端与机架连接， 另一端与第二曲形杆 41连接， 在第二弹性元件 的作用下，第二曲形杆 41始终具有相对机架转动，使第二曲形杆 41的第三作用端 41b 向接近固定板 112的方向移动， 从而将固定板 112顶起， 使打印头 111与打印胶辊 12 分离的运动趋势。 这样， 在打印模式时， 在第二弹性元件和双联凸轮 2两者共同作用下， 第二曲形 杆 41相对机架转动， 第二曲形杆 41和第三曲形杆 42克服弹性元件 113的弹力， 将固 定板 112向远离打印胶辊 12方向顶起， 使打印头 111相对打印胶辊 12分离。 通过设 置第二弹性元件， 可以使打印头 111与打印胶辊 12分离更加可靠。 热转印打印机使用的碳带为多色碳带， 图 8是根据本发明的多色碳带示意图。 如 图 8所示， 沿碳带长度方向， 依次为第一种颜色 a (如红色）、第二种颜色 b (如黄色）、 第三种颜色 c (如蓝色） 等多种颜色。 热转印打印机使用多色碳带打印时， 先完成第 一种颜色打印， 然后打印头与打印胶辊分离， 输送辊组将纸张退回至起始位置， 进行 第二种颜色打印， 以此类推， 直至完成所有颜色的打印后， 打印机将纸张输出， 完成 打印。 本实施例中以双色碳带为例， 结合图 2、 图 5-图 7介绍本实施例提供的热转印打 印机的工作过程。 热转印打印机在打印第一种颜色时， 热转印打印机的控制器控制切换机构 400的 电机转动，使热转印打印机位于打印模式，此时，打印头 111与打印胶辊 12相切配合， 输送辊组 300的第一辊 310和第二辊 320分离，打印胶辊 12和回收轴 220被驱动沿顺 时针方向转动， 打印胶辊 12向打印机构 100下游输送纸张和碳带， 回收轴 220将用过 的碳带缠绕在其外周上， 同时， 打印头 111 的发热元件发热， 把碳带涂层的第一种颜 色染料转印到纸张上形成图像或文字。 完成第一种颜色打印后， 热转印打印机的控制器控制切换机构 400的电机转动， 使热转印打印机由打印模式切换到退纸模式， 其中， 在切换过程中时， 打印头 111与 打印胶辊 12和 /或第一辊 310与第二辊 320夹持纸张， 可有效避免切换时纸张出现窜 动。 当切换到退纸模式后， 打印头 111与打印胶辊 12分离， 输送辊组 300的第一辊 310和第二辊 320相切配合夹持纸张， 第二辊 320被驱动沿逆时针方向转动， 打印胶 辊 12和回收轴 220停止转动，纸张被向打印机构 100上游方向输送，直至退到打印开 始位置， 此时只有第一辊 310与第二辊 320夹持纸张， 因此可以避免在退纸时出现争 纸或堆纸的问题。 接着， 控制器控制切换机构 400的电机继续转动， 使热转印打印机由退纸模式切 换到打印模式， 其中， 在切换过程中， 打印头 111与打印胶辊 12和 /或第一辊 310与 第二辊 320夹持纸张， 同样可以避免纸张窜动。 打印头 111与打印胶辊 12相切后， 打印胶辊 12和回收轴 220被驱动沿顺时针方 向转动，纸张由打印胶辊 12向打印机构 100下游输送， 回收轴 220将用过的碳带缠绕 在其外周上， 同时， 打印头 111 的发热元件发热， 把碳带涂层的第二种色染料转印到 纸张上形成图像或文字， 完成打印， 打印机控制打印胶辊 12继续转动， 将纸张送出打 印机， 在此过程中， 纸张由相切配合的打印头 111和打印胶辊 12夹持并输送， 同样能 够避免争纸或堆纸问题。 本实施例提供具有多色打印功能的热转印打印机， 通过设置切换机构， 使在打印 头与打印胶辊相切或分离、 输送辊组的第一辊与第二辊相切或者分离的切换过程中， 始终有打印头与打印胶辊和 /或第一辊与第二辊夹持纸张， 因此可以避免纸张窜动， 而 在打印进纸或者退纸时， 由打印头与打印胶辊或者输送辊组的第一辊与第二辊夹持纸 张， 因此有效地避免了争纸或者堆纸等问题。 图 9是根据本发明另一实施例的热转印打印机处于打印模式时的结构示意图。 如 图所示， 本实施例与上一实施例相比， 不同之处在于本实施例中第二切换组件 4支撑 打印胶辊 12的两端， 打印胶辊 12能够绕自身轴线转动。 在双联凸轮 2的作用下， 第 二切换组件 4带动打印胶辊 12相对机架运动， 与打印头 111相切配合或者分离。 图 10是根据本发明另一实施例的热转印打印机的双联凸轮的示意图。 如图所示， 本实施例中第一凸轮 21的第一近修止角 al与第二凸轮 22的第二近修止角 bl层叠， 第一凸轮 21的第一远修止角 a2与第二凸轮 22的第二远修止角 b2位置部分层叠； 第 一凸轮 21的第一推程运动角 a3与第二凸轮 22的第二推程运动角 b3层叠， 第一凸轮 21的第一回程运动角 a4与第二凸轮 22的第二回程运动角 b4层叠， 且 a3>b4、 a4>b3。 如图 9所示， 第一切换组件 3的第一曲形杆 31的第一作用端 31a与输送辊组 300 的第二辊 320连接，第一曲形杆 31具有使第二辊 320与第一辊 310相切配合的第五位 置及使第二辊 320与第一辊 310分离的第六位置； 第二切换组件 4的第二曲形杆 41 和第三曲形杆 42各自的一端分别与打印胶辊 12的两端连接，第二曲形杆 41和第三曲 形杆 42具有使打印胶辊 12与打印头 111分离的第七位置及使打印胶辊 12与打印头 111 相切配合的第八位置。 热转印打印机在打印第一种颜色时， 热转印打印机的控制 器控制切换机构 400的电机转动， 使热转印打印机处于打印模式。 此时， 第一凸轮 21 的第二工作面 21b驱动第二曲形杆 41处于第八位置， 使与第二曲形杆 41和第三曲形 杆 42的另一端连接的打印胶辊 12与打印头 111相切配合， 同时， 第二凸轮 22的第五 工作面 22a驱动第一曲形杆 31处于第六位置， 使位于第一曲形杆 31另一端的第二辊 320与第一辊 310分离。 打印胶辊 12和回收轴 220被驱动转动， 打印胶辊 12向打印机构 100下游输送纸 张和碳带， 回收轴 220将用过的碳带缠绕在其外周上， 同时， 打印头 111的发热元件 发热， 把碳带涂层的第一种颜色染料转印到纸张上形成图像或文字。 完成第一种颜色打印后， 热转印打印机的控制器控制切换机构 400的电机转动， 使热转印打印机由打印模式切换到退纸模式， 即打印机构 100的打印头 111与打印胶 辊 12从相切配合切换到分离，输送辊组 300的第一辊 310和第二辊 320由分离切换到 相切配合。 图 11 是根据本发明另一实施例的热转印打印机由打印模式向退纸模式切换的过 渡过程示意图。 如图 11所示， 双联凸轮 2的电机驱动双联齿轮 20按设定方向 （如图 中顺时针方向） 转动， 第二凸轮 22的第七工作面 22c与第一曲形杆 31的第一作用端 31a接触，驱动第一曲形杆 31绕第一轴 32转动，使与第一曲形杆 31连接的第二辊 321 向靠近第一辊 310方向移动， 同时， 第一凸轮 21 的第四工作面 21d驱动第二曲形杆 41和第三曲形杆 42以第二轴 43为中心转动， 使与第二曲形杆 41和第三曲形杆 42连 接的打印胶辊 12向远离打印头 111方向移动。 由于第二凸轮 22的第二推程运动角 b3小于第一凸轮 21的第一回程运动角 a4， 因此双联凸轮 2转动 b3角度后， 首先通过第二凸轮 22的第七工作面 22c驱动输送辊 组 300的第二辊 310与第一辊 310相切配合，在双联凸轮 2继续转动（a4-b3 )角度后， 接着通过第一凸轮 21的第四工作面 21d驱动第二曲形杆 41和第三曲形杆 42带动打印 胶辊 12与打印头 111分离， 这样， 在打印头 111与打印胶辊 12由相切到分离的切换 过程中，纸张在被第一辊 310和第二辊 320夹持后，打印胶辊 12才与打印头 111分离， 即切换过程中纸张一直被打印头 111与打印胶辊 12和 /或第一辊 310与第二辊 320夹 持， 因此可以避免纸张窜动。 当热转印打印机由打印模式向退纸模式切换过程完成后， 此时纸张被输送辊组 300的第一辊 310和第二辊 320夹持。 图 12是图 9所示的热转印打印机处于退纸模式 的示意图。 如图 12所示， 电机驱动双联凸轮 2继续转动设定角度， 第一凸轮 21的第 一工作面 21a驱动第二曲形杆 41处于第七位置， 使连接于第二曲形杆 41和第三曲形 杆 42另一端的打印胶辊 12与打印头 111分离，此时打印头组件 11受弹性元件 113的 作用， 向打印胶辊 12方向偏压， 直至搭接在机架上的限位件（图中未示出）上， 打印 头组件 11位置稳定。 第二凸轮 22的第六工作面 22b驱动第一曲形杆 31处于第五位置， 使连接于第一 曲形杆 31另一端的第二辊 320与第一辊 310相切配合。此时热转印打印机处于退纸模 式， 即打印胶辊 12与打印头 111分离， 输送辊组 300的第一辊 310与第二辊 320相切 配合。 当热转印打印机处于退纸模式后， 纸张由第一辊 310和第二辊 320夹持， 热转印 打印机的控制器控制输送辊组 300的第二辊 320反向转动，驱动第一辊 310随之转动， 将纸张退回到打印初始位置。 当输送辊组 300将纸张退回到打印初始位置后， 热转印打印机的控制器控制切换 机构， 使其由退纸模式切换至打印模式， 即打印头 111与打印胶辊 12由分离切换至相 切配合， 输送辊组 300的第一辊 310与第二辊 320由相切配合切换至分离。 图 13 是根据本发明另一实施例的热转印打印机由退纸模式向打印模式切换的过 渡过程示意图。 如图 13所示， 电机继续驱动双联凸轮 2转动， 第一凸轮 21的第三工 作面 21c与第二曲形杆 41的第三接触端 41a抵接， 并驱动第二曲形杆 41和第三曲形 杆 42相对机架转动， 使与第二曲形杆 41和第三曲形杆 42连接的打印胶辊 12向打印 头 111方向移动， 同时， 第二凸轮 22的第八工作面 22d与第一曲形杆 31的第一接触 端 31a抵接， 并驱动第一曲形杆 31相对机架转动， 使与第一曲形杆 31连接的第二辊 320向远离第一辊 310方向移动。 由于第一凸轮 21的第一推程运动角 a3大于第二凸轮 22的第二回程运动角 b4， 因此双联凸轮 2转动 b4角度， 首先通过第一凸轮 21的第三工作面 21c驱动第二曲形 杆 41和第三曲形杆 42转动， 使打印胶辊 12与打印头相切后， 双联凸轮 2继续转动 (a3-b4)角度， 接着通过第二凸轮 22的第八工作面 22d驱动第一曲形杆 31转动， 使 打印胶辊 12相对打印头 111相切。 这样， 在打印胶辊 12与打印头 111由分离到相切配合的切换过程中， 纸张一直被 第一辊 310和第二辊 320夹持， 直至打印胶辊 12与打印头 111相切后， 第二辊 320才 相对第一辊 310分离， 即在切换过程中， 纸张始终被打印头 111与打印胶辊 12和 /或 第一辊 310与第二辊 320夹持， 因此可以避免纸张传动。 在本实施例中， 打印胶辊相对于打印头移动， 同样达到了切换过程中打印头与打 印胶辊和 /或第一辊与第二辊夹持纸张， 而在打印进纸或者退纸时只有打印头与打印胶 辊或第一辊与第二辊夹持纸张的目的。 需要指出的是， 打印机构的打印头和打印胶辊的分离和相切配合可单独地由一个 切换机构来控制， 输送辊组的第一辊和第二辊的分离和相切配合可单独地由另一个切 换机构来控制， 两个切换机构的组合状态和切换的先后顺序可由控制器来控制。 在上 述实施例中， 切换机构由凸轮摆杆机构来实现， 在其它实施例中， 切换机构可由电动 缸、 凸轮推杆机构等来实现。 通过以上描述可以看出， 本发明提供的热转印打印机在进行多色打印时， 在纸张 输送过程中即可避免纸张窜动， 又可避免争纸、 堆纸等问题， 提高了热转印打印机的 可靠性。 以上仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技术人 员来说， 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内， 所作的任何 修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种具有多色打印功能的热转印打印机， 其特征在于， 包括- 打印机构 （100)， 包括打印头组件（11 )和打印胶辊（12)， 其中， 所述打 印头组件 （11 ) 包括与所述打印胶辊 （12) 相对设置的打印头 （111 )， 所述打 印机构 （100) 具有所述打印胶辊 （12) 与所述打印头 （111 ) 相切配合的打印 输送状态及所述打印胶辊 （12) 与所述打印头 （111 ) 相分离的分离状态； 碳带机构 （200)， 包括发放轴 （210)和回收轴 （220)， 其中， 碳带自所述 发放轴 （210)、 经过所述打印头 （111 )和打印胶辊（12)之间、 回卷在所述回 收轴 （220) 上；
输送辊组（300)， 包括第一辊（310)和第二辊（320)， 其中， 所述输送辊 组（300)具有所述第一辊（310)与第二辊（320)相切配合的打印纸输送状态 及所述第一辊 （310) 与第二辊 （320) 相分离的分离状态； 以及
切换装置（400)， 用于在打印模式时使所述打印机构（100)处于所述打印 输送状态并且使所述输送辊组（300)处于所述分离状态； 在退纸模式时使所述 打印机构（100)由所述打印输送状态切换至所述分离状态并且使所述输送辊组 (300) 由所述分离状态切换至所述打印纸输送状态。
2. 根据权利要求 1所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 切换装置（400)还用于在由所述打印模式切换至所述退纸模式或者由所述退纸 模式切换至所述打印模式的切换过程中，提供一保持过程，在所述保持过程中， 所述打印机构 （100) 和 /或所述输送辊组 （300) 夹持纸张。
3. 根据权利要求 1所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 打印头组件（11 )包括枢接在机架上用于安装所述打印头（111 )的固定板（112) 和向所述固定板 （112) 偏压的弹性元件 （113 )， 其中， 所述固定板 （112) 上 的打印头 （111 ) 具有向所述打印胶辊 （12) 方向偏转的趋势。
4. 根据权利要求 3所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 切换装置 （400) 包括：
第一曲形杆（31 )， 围绕所述机架上的第一轴 （32) 的轴线摆动， 其中， 所 述输送辊组的第二辊（320)与所述第一曲形杆（31 ) 的第一端连接， 所述第一 曲形杆 （31) 具有使所述第二辊 （320) 和第一辊 （310) 相切配合的第一位置 及使所述第二辊 （320) 和第一辊 （310) 分离的第二位置；
第二曲形杆（41)， 围绕所述机架上的第二轴 （43) 的轴线摆动， 其中， 所 述打印头组件 （11) 还包括与所述第二曲形杆 （41) 的第一端相抵接的支持部 (112d)， 所述第二曲形杆（42)具有其第一端抵压所述支持部（112d)使所述 打印头 （111) 与所述打印胶辊 （12) 分离的第三位置及使所述打印头 （111) 与所述打印胶辊 （12) 相切配合的第四位置， 以及
双联凸轮（2)， 包括同轴固定连接的第一凸轮（21)和第二凸轮（22)， 所 述第一凸轮（21)具有与所述第二曲形杆（41)的第二端抵接配合的控制轮面， 所述第二凸轮 （22) 具有与所述第一曲形杆 （31) 的第二端抵接配合的控制轮 面，
其中， 所述第一凸轮 （21) 的控制轮面和第二凸轮 （22) 的控制轮面包括 两种组合状态： 使所述第一曲形杆 （31) 处于所述第一位置并且使所述第二曲 形杆 （41) 处于所述第三位置； 使所述第一曲形杆 （31) 处于所述第二位置并 且使所述第二曲形杆 （41) 处于所述第四位置。
5. 根据权利要求 4所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 第一凸轮 （21) 的控制轮面和第二凸轮 （22) 的控制轮面还包括另外两种组合 状态： 在驱使所述第二曲形杆 （41) 摆动至所述第四位置之后再驱使所述第一 曲形杆 （31) 摆动至所述第二位置； 以及在驱使所述第一曲形杆 （31) 摆动至 所述第一位置之后再驱使所述第二曲形杆 （41) 摆动至所述第三位置。
6. 根据权利要求 4所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 切换装置还包括使所述第一曲形杆 （31) 回复至所述第二位置的第一弹性元件 和使所述第二曲形杆 （41) 回复至所述第三位置的第二弹性元件。
7. 根据权利要求 1所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 打印胶辊 （12) 相对于所述打印头组件 （11) 的位置是可移动的。
8. 根据权利要求 7所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 切换装置 （400) 包括：
第一曲形杆（31)， 围绕所述机架上的第一轴 （32) 的轴线摆动， 其中， 所 述输送辊组 （300) 的第二辊 （320) 与所述第一曲形杆 （31) 的第一端连接， 所述第一曲形杆 （31) 具有使所述第二辊 （320) 与第一辊 （310) 相切配合的 第五位置及使所述第二辊 （320) 与第一辊 （310) 分离的第六位置； 第二曲形杆（41 )， 围绕所述机架上的第二轴 （43 ) 的轴线摆动， 其中， 所 述打印胶辊（12)与所述第二曲形杆（41 )的第一端连接，所述第二曲形杆（41 ) 具有使所述打印胶辊（12)与所述打印头（111 )分离的第七位置及使所述打印 胶辊 （12) 与所述打印头 （111 ) 相切配合的第八位置； 以及
双联凸轮（2)， 包括同轴固定连接的第一凸轮（21 )和第二凸轮（22)， 所 述第一凸轮（21 )具有与所述第二曲形杆（41 )的第二端抵接配合的控制轮面， 所述第二凸轮 （22) 具有与所述第一曲形杆 （31 ) 的第二端抵接配合的控制轮 面，
其中， 所述第一凸轮 （21 ) 的控制轮面和第二凸轮 （22) 的控制轮面包括 两种组合状态： 使所述第一曲形杆 （31 ) 处于所述第五位置并且使所述第二曲 形杆 （41 ) 处于所述第七位置； 使所述第一曲形杆 （31 ) 处于所述第六位置并 且使所述第二曲形杆 （41 ) 处于所述第八位置。
9. 根据权利要求 8所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 第一凸轮 （21 ) 的控制轮面和第二凸轮 （22) 的控制轮面还包括另外两种组合 状态： 在驱使所述第二曲形杆 （41 ) 摆动至所述第八位置之后再驱使所述第一 曲形杆 （31 ) 摆动至所述第六位置； 以及在驱使所述第一曲形杆 （31 ) 摆至所 述第五位置之后再驱使所述第二曲形杆 （41 ) 摆动至第七位置。
10. 根据权利要求 7所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 切换装置（400)还包括使所述第一曲形杆（31 ) 回复至所述第六位置的第三弹 性元件和使所述第二曲形杆 （41 ) 回复至所述第七位置的第四弹性元件。
11. 根据权利要求 1所述的具有多色打印功能的热转印打印机， 其特征在于， 所述 切换装置 （400) 包括使所述打印机构 （100) 处于打印输送状态或分离状态的 第一切换机构、 以及使所述输送辊组（300)处于所述打印纸输送状态或分离状 态的第二切换机构。
12. 一种具有多色打印功能的热转印打印机的打印方法，包括打印步骤和退纸步骤， 其特征在于，
在所述打印步骤中， 使打印机构的打印头和打印胶辊处于所述打印输送状 态并且使输送辊组的第一辊和第二辊处于所述分离状态， 以及
在退纸步骤中， 使所述打印机构的打印头和打印胶辊由所述打印输送状态 切换至所述分离状态并且使所述输送辊组的第一辊和第二辊由所述分离状态切 换至所述打印纸输送状态。
13. 根据权利要求 12所述的打印方法，其特征在于，还包括由所述打印步骤切换至 所述退纸步骤的第一过渡步骤和由所述退纸步骤切换至所述打印步骤的第二过 渡步骤， 其中，
在所述第一过渡步骤和第二过渡步骤中，使所述打印机构和 /或所述输送辊 组始终夹持所述纸张、 以避免纸张窜动。
14. 根据权利要求 13所述的打印方法， 其特征在于，
在所述第一过渡步骤中， 在所述输送辊组的第一辊和第二辊由所述分离状 态切换至所述打印纸输送状态后再使所述打印机构的打印头和打印胶辊切换至 所述分离状态；
在所述第二过渡步骤中， 在所述打印机构的打印头和打印胶辊由所述分离 状态切换至所述打印输送状态后再使所述输送辊组的第一辊和第二辊切换至所 述分离状态。
PCT/CN2012/081023 2011-09-13 2012-09-05 具有多色打印功能的热转印打印机和打印方法 WO2013037274A1 (zh)

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