CN102991140B - Thermal transfer printing printer with multi-color printing function and printing method - Google Patents

Thermal transfer printing printer with multi-color printing function and printing method Download PDF

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Publication number
CN102991140B
CN102991140B CN201110269752.4A CN201110269752A CN102991140B CN 102991140 B CN102991140 B CN 102991140B CN 201110269752 A CN201110269752 A CN 201110269752A CN 102991140 B CN102991140 B CN 102991140B
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China
Prior art keywords
printing
roller
curved rod
cam
paper
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Application number
CN201110269752.4A
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Chinese (zh)
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CN102991140A (en
Inventor
高明
邓少华
姜天信
王鑫
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Shandong New Beiyang Information Technology Co Ltd
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Shandong New Beiyang Information Technology Co Ltd
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Priority to CN201110269752.4A priority Critical patent/CN102991140B/en
Priority to PCT/CN2012/081023 priority patent/WO2013037274A1/en
Publication of CN102991140A publication Critical patent/CN102991140A/en
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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

Landscapes

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

Abstract

The invention discloses a thermal transfer printing printer with a multi-color printing function and a printing method. The thermal transfer printing printer comprises a printing mechanism, a thermal transfer ribbon mechanism, a conveying roll set and a switching device, wherein the printing mechanism has a printing conveyance state and a separation state, the thermal transfer ribbon mechanism comprises an unwinding reel and a winding reel, the conveying roll set has a printing paper conveyance state and a separation state, and the switching device is used for enabling the printing mechanism to be in the printing conveyance state and enabling the conveying roll set to be in the separation state in a printing mode, and enabling the printing mechanism to be switched from the printing conveyance state to the separation state and enabling the conveying roll set to be switched from the separation state to the printing paper conveyance state in a paper unwinding mode. According to the thermal transfer printing printer, the problem of paper scrambling or paper accumulation due to the fact that a printing head and a printing rubber roll as well as a first roll and a second roll clamp paper simultaneously is avoided effectively.

Description

There is thermal transfer printer and the Method of printing of multi-color printing function
Technical field
The present invention relates to the thermal transfer printer and Method of printing with multi-color printing function.
Background technology
In prior art, thermal transfer printer prints multicolor image or word extensive use.
Chinese patent description CN101927615A discloses a kind of thermal transfer printer with multi-color printing function.As shown in Figure 1, thermal transfer printer comprises printing mechanism, carbon ribbon mechanism, and conveying roller group, and wherein printing mechanism comprises the printhead 14 ' and printing rubber roller 13 ' that cooperatively interact, and print paper passes between; Carbon ribbon mechanism comprises granting axle 17b and reclaims axle 17a, untapped carbon ribbon is delivered between printhead 14 ' and printing rubber roller 13 ' by providing axle 17b, and be positioned between printing paper and printhead 14 ', along with printing, carbon ribbon 16 ' gradually backrush is wrapped on recovery axle 17a.
Along medium transport direction, be also provided with conveying roller group in the downstream of printing mechanism, for opening to printing mechanism upstream fed printing sheet.Conveying roller group comprises the first roller 15a and the second roller 15b of tangent cooperation, and print paper is from passing between the two.
The carbon ribbon coat side that thermal transfer printer uses comprises along its length the multiple color of fixed length arrangement successively, and during printing, printer prints word or the image of different colours in nominal value successively.When printer is when carrying out the first color print, untapped carbon ribbon and printing paper to be printed pass between printhead 14 ' and printing rubber roller 13 ', the coat side of carbon ribbon 16 ' and the surface contact of printing paper, the non-coat side of carbon ribbon contacts with printhead 14 ', printing rubber roller 13 ' rotates, to printing mechanism downstream fed printing sheet and carbon ribbon, reclaim axle 17a to rotate, reclaim the carbon ribbon that printing rubber roller 13 ' exports, simultaneously, control system carries out computer heating control to the heater element of printhead 14 ', printing is completed on the dye transfer in carbon ribbon coat side to printing paper.
After completing the first color print, printhead 14 ' is separated with printing rubber roller 13 ', conveying roller group rotates backward, printing rubber roller 13 ' and recovery axle 17a stop operating, the paper completing the first color print is retreated to initial printing position, printhead 14 ' is tangent with printing rubber roller 13 ', starts the printing of lower a kind of color.
The present inventor finds: the thermal transfer printer of prior art is in Paper Printing process, printing mechanism and conveying roller group are clamped simultaneously and carry paper, if its transmission mechanism has driving error, then can be inconsistent and cause the problem of striving paper or piling paper because of the transporting velocity of the transporting velocity of printing mechanism and conveying roller group, thus cause paper sheet delivery fault.
Summary of the invention
The object of the present invention is to provide a kind of thermal transfer printer with multi-color printing function can avoiding striving the paper sheet delivery fault such as paper or heap paper.Present invention also offers a kind of Method of printing with the thermal transfer printer of multi-color printing function simultaneously.
For this reason, one aspect of the present invention provides a kind of thermal transfer printer with multi-color printing function, comprise: printing mechanism, comprise print head assembly and printing rubber roller, wherein, print head assembly comprises the printhead be oppositely arranged with printing rubber roller, and printing mechanism has the released state that the tangent printing feed status that coordinates of printing rubber roller and printhead and printing rubber roller and printhead are separated; Carbon ribbon mechanism, comprises and provides axle and reclaim axle, wherein, carbon ribbon from providing axle, between printhead and printing rubber roller, backrush reclaiming on axle; Conveying roller group, comprises the first roller and the second roller, and wherein, conveying roller group has the released state that the tangent printing paper feed status that coordinates of the first roller and the second roller and the first roller and the second roller are separated; And switching device shifter, be in for making printing mechanism when printing model and print feed status and make conveying roller group be in released state; Make printing mechanism switch to released state by printing feed status and make conveying roller group switch to printing paper feed status by released state when moving back paper matrix formula.
Further, above-mentioned switching device shifter also for moving back paper matrix formula or switch in the handoff procedure of printing model by moving back paper matrix formula being switched to by printing model, provides a keep-process, in keep-process, and printing mechanism and/or conveying roller group clamping paper.
Further, above-mentioned print head assembly comprises and is articulated in for installing the fixed head of printhead and the flexible member to fixed head bias voltage in frame, and wherein, the printhead on fixed head has the trend to the deflection of printing rubber roller direction.
Further, above-mentioned switching device shifter comprises: the first curved rod, around the axis oscillating of the first axle in frame, wherein, second roller of conveying roller group is connected with the first end of the first curved rod, and the first curved rod has the primary importance making the second roller and the tangent cooperation of the first roller and the second place that the second roller is separated with the first roller, second curved rod, around the axis oscillating of the second axle in frame, wherein, print head assembly also comprises the support sector abutted against with the first end of the second curved rod, second curved rod has its first end and compresses the 3rd position that support sector makes printhead be separated with printing rubber roller and make tangent the 4th position coordinated of printhead and printing rubber roller, and double-linked cam, comprise the first cam and the second cam that are coaxially fixedly connected with, first cam has and abuts with the second end of the second curved rod the control wheel face coordinated, second cam has and abuts with the second end of the first curved rod the control wheel face coordinated, wherein, the control wheel face of the first cam and the control wheel face of the second cam comprise two kinds of assembled state: make the first curved rod be in primary importance and make the second curved rod be in the 3rd position, make the first curved rod be in the second place and make the second curved rod be in the 4th position.
Further, the control wheel face of above-mentioned first cam and the control wheel face of the second cam also comprise other two kinds of assembled state: after ordering about the second curved rod and being rocked to the 4th position by the 3rd position, order about the first curved rod be again rocked to the second place; And after ordering about the first curved rod and being rocked to primary importance by the second place, order about the second curved rod be again rocked to the 3rd position.
Further, above-mentioned switching device shifter also comprise make the first curved rod return back to the second place the first flexible member and make the second curved rod return back to the second flexible member of the 3rd position.
Further, above-mentioned printing rubber roller is moveable relative to the position of print head assembly.
Further, above-mentioned switching device shifter comprises: the first curved rod, around the axis oscillating of the first axle in frame, wherein, second roller of conveying roller group is connected with the first end of the first curved rod, and the first curved rod has the 5th position making the second roller and the tangent cooperation of the first roller and the 6th position that the second roller is separated with the first roller; Second curved rod, around the axis oscillating of the second axle in frame, wherein, printing rubber roller is connected with the first end of the second curved rod, and the second curved rod has the 7th position that printing rubber roller is separated with printhead and makes the tangent 8 positions coordinated of printing rubber roller and printhead; And double-linked cam, comprise the first cam and the second cam that are coaxially fixedly connected with, first cam has and abuts with the second end of the second curved rod the control wheel face coordinated, second cam has and abuts with the second end of the first curved rod the control wheel face coordinated, wherein, the control wheel face of the first cam and the control wheel face of the second cam comprise two kinds of assembled state: make the first curved rod be in the 5th position and make the second curved rod be in the 7th position; Make the first curved rod be in the 6th position and make the second curved rod be in 8 positions.
Further, the control wheel face of above-mentioned first cam and the control wheel face of the second cam also comprise other two kinds of assembled state: after ordering about the second curved rod and being rocked to 8 positions, order about the first curved rod be again rocked to the 6th position; And after ordering about the first curved rod and being rocked to the 5th position, order about the second curved rod be again rocked to the 7th position.
Further, above-mentioned switching device shifter also comprise make the first curved rod return back to the 6th position the 3rd flexible member and make the second curved rod return back to the 4th flexible member of the 7th position.
Further, above-mentioned switching device shifter comprises the first switching mechanism of printing mechanism being in print feed status or released state and makes conveying roller group be in the second switching mechanism of printing paper feed status or released state.
According to a further aspect in the invention, provide a kind of Method of printing with the thermal transfer printer of multi-color printing function, comprise printing step and move back paper step, wherein: in printing step, the printhead of printing mechanism and printing rubber roller are in print feed status and make the first roller of conveying roller group and the second roller be in released state, and moving back in paper step, make the printhead of printing mechanism and printing rubber roller switch to released state by printing feed status and make the first roller of conveying roller group and the second roller switch to printing paper feed status by released state.
Further, above-mentioned Method of printing also comprises and switches to the First Transition step of moving back paper step by printing step and by second transition step of moving back paper step and switch to printing step, wherein, in First Transition step and the second transition step, printing mechanism and/or conveying roller group is made to clamp paper all the time, to avoid paper play.
Further, in above-mentioned First Transition step, after the first roller of conveying roller group and the second roller switch to printing paper feed status by released state, the printhead of printing mechanism and printing rubber roller is made to switch to released state again; In above-mentioned second transition step, the printhead of printing mechanism and printing rubber roller to be switched to by released state print feed status after make the first roller of conveying roller group and the second roller switch to released state again.
According to the thermal transfer printer with multi-color printing function of the present invention, in printing model or when moving back paper matrix formula, printhead and printing rubber roller clamp the first roller of paper or conveying roller group and the second roller clamps paper, therefore efficiently avoid clamp that paper produces due to printhead and printing rubber roller and the first roller and the second roller simultaneously strive paper or pile paper problem.Therefore, thermal transfer printer provided by the invention can be avoided when carrying out multi-color printing striving the paper sheet delivery fault such as paper or heap paper.In addition, according to thermal transfer printer of the present invention, in handoff procedure, paper is clamped by printhead and printing rubber roller all the time and/or is clamped by the first roller and the second roller, therefore can avoid paper play.
Except object described above, feature and advantage, other object, feature and advantage that the present invention has, will be described in further detail by reference to the accompanying drawings.
Accompanying drawing explanation
Forming the part of this description, showing the preferred embodiments of the present invention for understanding accompanying drawing of the present invention further, and be used for principle of the present invention is described together with description.In figure:
Fig. 1 is the schematic diagram of the thermal transfer printer of prior art;
Fig. 2 is the schematic diagram that thermal transfer printer is according to a first embodiment of the present invention in printing model;
Fig. 3 is the partial structurtes axonometric drawing of the thermal transfer printer shown in Fig. 2;
Fig. 4 a is the schematic diagram of the first cam in the double-linked cam of the thermal transfer printer shown in Fig. 2;
Fig. 4 b is the schematic diagram of the second cam in the double-linked cam of the thermal transfer printer shown in Fig. 2;
Fig. 4 c is the first cam of the double-linked cam of the thermal transfer printer shown in Fig. 2 and the relative position relation schematic diagram of the second cam;
Fig. 5 is the thermal transfer printer shown in Fig. 2 by printing model to the transient process schematic diagram moving back paper matrix formula and switch;
Fig. 6 is that the thermal transfer printer shown in Fig. 2 is in the schematic diagram moving back paper matrix formula;
Fig. 7 is the thermal transfer printer shown in Fig. 2 by the transient process schematic diagram moving back paper matrix formula and switch to printing model;
Fig. 8 is the schematic diagram according to polychrome carbon ribbon of the present invention;
Fig. 9 is the schematic diagram that thermal transfer printer is according to a second embodiment of the present invention in printing model;
Figure 10 is the first cam of the double-linked cam of the thermal transfer printer shown in Fig. 9 and the relative position relation schematic diagram of the second cam;
Figure 11 is the thermal transfer printer shown in Fig. 9 by printing model to the transient process schematic diagram moving back paper matrix formula and switch;
Figure 12 is that the thermal transfer printer shown in Fig. 9 is in the schematic diagram moving back paper matrix formula; And
Figure 13 is the thermal transfer printer shown in Fig. 9 by the transient process schematic diagram moving back paper matrix formula and switch to printing model.
Description of reference numerals
100 printing mechanism 200 carbon ribbon mechanisms
300 conveying roller group 400 switching mechanisms
11 print head assembly 12 printing rubber rollers
13 rotating shaft 111 printheads
112 fixed head 113 flexible members
112a left plate 112b right plate
The left support sector of 112c gripper shoe 112d
The right support sector 210 of 112e provides axle
220 reclaim axle 310 first roller
320 second roller 2 double-linked cams
3 first changeover module 4 second changeover modules
21 first cam 22 second cams
21a first working face 21b second working face
21c the 3rd working face 21d the 4th working face
22a the 5th working face 22b the 6th working face
22c the 7th working face 22d the 8th working face
31 first curved rod 32 first axles
31a first acts on end 41 second curved rod
42 the 3rd curved rod 43 second axles
41a second acts on end 42a the 4th and acts on end
42b the 5th acts on end.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 2 is the schematic diagram that thermal transfer printer is according to a first embodiment of the present invention in printing model, and Fig. 3 is the partial structurtes axonometric drawing of the thermal transfer printer shown in Fig. 2.As shown in Figures 2 and 3, thermal transfer printer comprises printing mechanism 100, carbon ribbon mechanism 200, conveying roller group 300 and switching mechanism 400.
The print What of printing mechanism 100 for presetting at print on paper.Printing mechanism 100 comprises print head assembly 11 and printing rubber roller 12.Wherein, print head assembly 11 is hinged with the frame of thermal transfer printer by rotating shaft 13, can 13 rotate around the shaft; Printing rubber roller 12 is supported by frame, freely can rotate around own axes.When print head assembly 11 13 rotation around the shaft, the printhead 111 in print head assembly 11 can be separated or tangent cooperation with printing rubber roller 12.
Particularly, print head assembly 11 comprises printhead 111, fixed head 112 and flexible member 113.Wherein, fixed head 112 comprises left plate 112a, right plate 112b and gripper shoe 112c, and wherein, left plate 112a and right plate 112b be arranged in parallel, and gripper shoe 112c is vertically set between left plate 112a and right plate 112b.Printhead 111 is fixedly connected with gripper shoe 112c, and between left plate 112a and right plate 112b, rotating shaft 13 is connected with frame and runs through left plate 112a and right plate 112b one end away from printhead 111 successively, fixed head 112 and printhead 111 can together with 13 rotate around the shaft.
Flexible member 113 can be stage clip, torsion spring or leaf spring etc., quantity is at least one, be positioned at one end of gripper shoe 112c fixing printing head 111, and be positioned at the side of gripper shoe 112c away from printhead 111, one end of flexible member 113 is connected with gripper shoe 112c, the other end is connected with frame, and under the effect of flexible member 113, fixed head 112 drives printhead 111 to there is movement tendency to printing rubber roller 12 bias voltage all the time.
When printing rubber roller 12 rotates along direction initialization, along sheet transport direction, the paper between printhead 111 and printing rubber roller 12 and carbon ribbon can be carried to printing mechanism 100 downstream.
Carbon ribbon mechanism 200 comprises and is parallel to the axial granting axle 210 arranged of printing rubber roller 12 and reclaims axle 220.Wherein, providing axle 210 for supporting unworn carbon ribbon, reclaiming axle 220 for being wound around on their outer circumference by the carbon ribbon discharged by granting axle 210.
Particularly, recovery axle 220 and printing rubber roller 12 are pressed direction initialization and are rotated, and are drawn by untapped carbon ribbon from granting axle 210, and carbon ribbon is after between printhead 111 and paper, and backrush is wrapped on the periphery of recovery axle 220.The coat side of carbon ribbon contacts with paper, and the non-coat side of carbon ribbon contacts with printhead 111.When printing rubber roller 12 rotates, drive the carbon ribbon between printhead 111 and printing rubber roller 12 and paper to export to the downstream of printing mechanism 100, reclaim axle 220 simultaneously and rotate, be wound around with the carbon ribbon crossed on their outer circumference.
Along sheet transport direction, conveying roller group 300 is positioned at the upstream of printing mechanism 100, for being carried to printing mechanism 100 upstream by paper when printing rubber roller 12 is separated printhead 111 relatively, makes paper return back to initial position, to print lower a kind of color.
Conveying roller group 300 comprises and is oppositely arranged and lays respectively at the first roller 310 and the second roller 320 of paper both sides, first roller 310 and the second roller 320 are parallel to printing rubber roller 12 and axially arrange, one in both first roller 310 and the second roller 320 is supported by frame, another in both is flexibly connected with frame, all freely can rotate around own axes.
One in both first roller 310 and the second roller 320 is drive roll, another in both is driven voller, when the first roller 310 and the tangent cooperation of the second roller 320, drive roll rotates and drives driven voller to rotate, and is carried by the paper be positioned between the two to printing mechanism 100 upstream.
In the present embodiment, the first roller 310 of conveying roller group 300 is driven voller, supported by frame, second roller 320 is drive roll, be flexibly connected with frame, when the first roller 310 coordinates with the second roller 320 is tangent, when second roller 320 rotates, drive the first roller 310 to rotate thereupon, the paper be positioned between the two can be carried to printing mechanism 100 upstream.
Switching mechanism 400 comprises double-linked cam 2, first changeover module 3 and the second changeover module 4, and motor (not drawing in figure).
Wherein, double-linked cam 2 is under the driving of motor, the first roller 310 of conveying roller group 300 and the second roller 320 can be made alternatively to be in tangent cooperation or released state by the first changeover module 3, make the printhead 111 of printing mechanism 100 and printing rubber roller 12 alternatively be in tangent cooperation or released state by the second changeover module 4.
Double-linked cam 2 comprises and is coaxially fixedly connected with the first cam 21 and the second cam 22, and the output shaft of motor is in transmission connection with the first cam 21 and the second cam 22, for driving the first cam 21 and the second cam 22 synchronous axial system simultaneously.
Fig. 4 a is the schematic diagram of the first cam in the double-linked cam of the thermal transfer printer shown in Fig. 2, as shown in fig. 4 a, closely repairing with first of the first cam 21 curved surface that only angle a1 is corresponding is the first working face 21a, far repairing with first of the first cam 21 curved surface that only angle a2 is corresponding is the second working face 21b, the curved surface corresponding with the first motion angle for actuating travel a3 of the first cam 21 is the 3rd working face 21c, and the curved surface corresponding with the first motion angle for return travel a4 of the first cam 21 is the 4th working face 21d.
Fig. 4 b is the schematic diagram of the second cam in the double-linked cam of the thermal transfer printer shown in Fig. 2, as shown in Figure 4 b, closely repairing with second of the second cam 22 curved surface that only angle b1 is corresponding is the 5th working face 22a, far repairing with second of the second cam 22 curved surface that only angle b2 is corresponding is the 6th working face 22b, the curved surface corresponding with the second motion angle for actuating travel b3 of the second cam 22 is the 7th working face 22c, and the curved surface corresponding with the second motion angle for return travel b4 of the second cam 22 is the 8th working face 22d.
Fig. 4 c is the first cam of the double-linked cam of the thermal transfer printer shown in Fig. 2 and the relative position relation schematic diagram of the second cam.As illustrated in fig. 4 c, first of the first cam 21 closely repair only angle a1 and second of the second cam 22 and far repair that to stop angle b2 stacked; First of first cam 21 is far repaiied only angle a2 and second of the second cam 22 and is closely repaiied that to stop angle b1 stacked; First motion angle for actuating travel a3 of the first cam 21 and the second motion angle for return travel b4 of the second cam 22 is stacked, and a3 > b3; First motion angle for return travel a4 of the first cam 21 and the second motion angle for actuating travel b3 of the second cam 22 is stacked, and a4 > b4.
First changeover module 3 comprises the first curved rod 31 and the first axle 32, and wherein, the first curved rod 31 is hinged with frame by the first axle 32, can rotate around the first axle 32.One end of first curved rod 31 is connected with the first roller 310 of conveying roller group 300 or the second roller 320, the other end of the first curved rod 31 (hereinafter referred to as the first effect end 31a) abuts with the working curved surface of the second cam 22 of double-linked cam 2, namely abuts with in the 5th working face 22a of the second cam 22 or the 6th working face 22b or the 7th working face 22c or the 8th working face 22d tetra-working faces.In the present embodiment, the first curved rod 31 is connected with the second roller 320, has the primary importance making the second roller 320 and the tangent cooperation of the first roller 310 and the second place that the second roller 320 is separated with the first roller 310.
Second changeover module 4 comprises the second curved rod 41, the 3rd curved rod 42 and the second axle 43, wherein the second curved rod 41 and the 3rd curved rod 42 lay respectively at the both sides of printing mechanism 100, be symmetrical arranged about printing mechanism 100 width, second curved rod 41 is all fixedly connected with the second axle 43 with the 3rd curved rod 42, and the second axle 43 is supported by frame, can around own axis, therefore the second curved rod 41 and the 3rd curved rod 42 can centered by the second axle 43 relative frame synchronous axial system.
Wherein, the second effect end 41a is provided with in one end of the second curved rod 41, second effect end 41a abuts with the working curved surface of the first cam 21 of double-linked cam 2, namely can abut with in the first working face 21a of the first cam 21 or the second working face 21b or the 3rd working face 21c or the 4th working face 21d tetra-working faces, the other end of the second curved rod 41 is provided with the 3rd effect end 41b, 3rd effect end 41b can contact with the left support sector 112d of fixed head 112 or be separated, wherein, the left support sector 112d of fixed head 112 is connected with the left plate 112a of fixed head 112.Second curved rod 41 has and compresses left support sector 112d, the 3rd position that printhead 111 is separated with printing rubber roller 12 and make tangent the 4th position coordinated of printhead 111 and printing rubber roller 12.
Wherein, 4th effect end 42a is set in one end of the 3rd curved rod 42, when switching mechanism 400 comprises one group of double-linked cam 2,4th effect end 42a is unsettled, when switching mechanism comprises two groups of double-linked cams 2,4th effect end 42a can abut with the working curved surface of the first cam 21 in one group of another double-linked cam 2, the other end of the 3rd curved rod 42 is provided with the 5th effect end 42b, 5th effect end 42b can contact with the right support sector 112e of fixed head 112 or be separated, wherein, the right support sector 112e of fixed head 112 is connected with the right plate 112b of fixed head 112.Because the 3rd curved rod 42 is coaxially fixedly connected with the second curved rod 41, therefore the 3rd curved rod 42 has the 3rd position that printhead 111 is separated with printing rubber roller 12 equally and makes tangent the 4th position coordinated of printhead 111 and printing rubber roller 12, does not repeat them here.
Drive the double-linked cam 2 of switching mechanism 400 to rotate by motor, thermal transfer printer is switched in printing model and moving back between paper matrix formula.Wherein, in printing model, switching mechanism 400 makes the first roller 310 of conveying roller group 300 be separated with the second roller 320, and printhead 111 is coordinated with printing rubber roller 12 is tangent; Moving back paper matrix formula, switching mechanism 400 makes the first roller 310 of conveying roller group 300 coordinate with the second roller 320 is tangent, and printhead 111 is separated with printing rubber roller 12.
As shown in Figure 2, thermal transfer printer is when printing the first color, first, motor drives the double-linked cam 2 of switching mechanism 400 to rotate, make thermal transfer printer be in printing model, now, double-linked cam 2 drives the first curved rod 31 to be in the second place, its the first effect end 31a abuts with the 5th working face 22a of the second cam 22, and the second roller 320 connected with the first curved rod 31 is separated with the first roller 310; Double-linked cam 2 drives the second curved rod 41 to be in the 4th position, its the second effect end 41a abuts with the first working face 21a of the first cam 21, fixed head 112, under the effect of flexible member 113,13 rotates to printing rubber roller 12 direction around the shaft, printhead 111 is coordinated with printing rubber roller 12 is tangent.Then, printing rubber roller 12 and recovery axle 220 rotate, and to printing mechanism 100 downstream conveying paper and carbon ribbon, printhead 111 generates heat, by the first dye transfer on carbon ribbon on paper simultaneously.
After completing the first color print, the controller of thermal transfer printer controls the electric machine rotation of switching mechanism 400, thermal transfer printer is switched to moving back paper matrix formula by printing model, namely the printhead 111 of printing mechanism 100 is separated with printing rubber roller 12, the first roller 310 of conveying roller group 300 and the tangent cooperation of the second roller 320.
Fig. 5 is the thermal transfer printer shown in Fig. 2 by printing model to the transient process schematic diagram moving back paper matrix formula and switch.As shown in Figure 5, motor drives double-linked cam 2 to press direction initialization and rotates (as clockwise direction in figure), 7th working face 22c of the second cam 22 acts on first of the first curved rod 31 and holds 31a to contact, drive the first curved rod 31 to rotate around the first axle 32, the second roller 320 be connected with the first curved rod 31 is moved near the first roller 310 direction; 3rd working face 21c of the first cam 21 acts on second of the second curved rod 41 and holds 41a to contact, the second curved rod 41 and the 3rd curved rod 42 locking phase centered by the second axle 43 is driven to gantry rotation, the 5th effect end 42b of the 3rd of the second curved rod 41 the effect end 41b and the 3rd curved rod 42 to be moved respectively near the left support sector 112d of left plate 112a of fixed head 112 and the right support sector 112e direction of right plate 112b.
The second motion angle for actuating travel b3 due to the second cam 22 is less than the first motion angle for actuating travel a3 of the first cam 21, therefore, after double-linked cam rotates b3 angle, first the first curved rod is driven to be positioned at primary importance by the 7th working face 22c of the second cam 22, make the second roller 320 and the first roller 310 tangent, then after double-linked cam is rotated further (a3-b3) angle, the second curved rod 41 and the 3rd curved rod 42 is driven to be positioned at the 3rd position, the left support sector 112d of left plate 112a of the 3rd effect end 41b of the second curved rod 41 and the 5th effect end 42b difference jack-up fixed head 112 of the 3rd the curved rod 42 and right support sector 112e of right plate 112b, printhead 111 is separated with printing rubber roller 12.Like this, be coupled in the handoff procedure be separated at printhead 111 with printing rubber roller 12 by tangent, after paper is clamped by the first roller 310 and the second roller 320, printhead 111 is just separated with printing rubber roller 12.Namely, in handoff procedure, paper is clamped by printhead 111 and printing rubber roller 12 and/or the first roller 310 and the second roller 320 all the time, therefore can avoid paper play.
When thermal transfer printer by printing model to moving back after paper matrix formula switched, now paper is transferred the first roller 310 of roller group 300 and the second roller 320 clamps.
Fig. 6 is that the thermal transfer printer shown in Fig. 2 is in the schematic diagram moving back paper matrix formula.As shown in Figure 6, along with motor drives double-linked cam 2 to rotate clockwise set angle, the 6th working face 22b of the second cam 22 drives the first curved rod 31 to be positioned at primary importance, and the second roller 320 be connected with the first curved rod 31 is coordinated with the first roller 310 is tangent; Second working face 21b of the first cam 21 drives the second curved rod 41 to be positioned at the 3rd position, and printhead 111 is separated with printing rubber roller 12.Now thermal transfer printer is in and moves back paper matrix formula, namely the first roller 310 of conveying roller group 300 and the second roller 320 tangent, printhead 111 is separated with printing rubber roller 12, now, paper is only clamped by the first roller 310 of tangent cooperation and the second roller 320, therefore, the problem of striving paper or heap paper when moving back paper can be avoided.
After paper matrix formula is moved back in arrival, second roller 320 of the controller control conveying roller group 300 of thermal transfer printer rotates backward, drive the first roller 310 to rotate, returned to by paper after printing initial position, the printing carrying out lower a kind of color for thermal transfer printer is ready thereupon.
When moving back after paper completes, the controller of thermal transfer printer controls thermal transfer printer and switches to printing model by moving back paper matrix formula.
Fig. 7 is the thermal transfer printer shown in Fig. 2 by the transient process schematic diagram moving back paper matrix formula and switch to printing model.As shown in Figure 7, along with motor continues to drive double-linked cam 2 to rotate, 8th working face 22d of the second cam 22 acts on first of the first curved rod 31 and holds 31a to contact, drive the first curved rod 31 to rotate around the first axle 32, the second roller 320 be connected with the first curved rod 31 is moved to away from the first roller 310 direction; 4th working face 21d of the first cam 21 acts on second of the second curved rod 41 and holds 41a to contact, the second curved rod 41 and the 3rd curved rod 42 locking phase centered by the second axle 43 is driven to gantry rotation, the 5th effect end 42b of the 3rd of the second curved rod 41 the effect end 41b and the 3rd curved rod 42 to be moved respectively to the left support sector 112d of the left plate 112a away from fixed head 112 and the right support sector 112e direction of right plate 112b.
The second motion angle for return travel b4 due to the second cam 22 is less than the first motion angle for return travel a4 of the first cam 21, therefore, after double-linked cam rotates b4 angle, first drive the 5th effect end 42b of the 3rd of the second curved rod 41 the effect end 41b and the 3rd curved rod 42 respectively away from the left support sector 112d of the left plate 112a of the fixed head 112 and right support sector 112e of right plate 112b by the 4th working face 21d of the first cam 21, make after printhead 111 coordinates with printing rubber roller 12 is tangent, angle that double-linked cam is rotated further (a4-b4), second cam 22 drives the first curved rod 31 to be rotated further, relative first roller 310 of the second roller 320 is driven to be separated.
Like this, at printhead 111 with printing rubber roller 12 by being separated in the tangent handoff procedure coordinated, paper is clamped by the first roller 310 and the second roller 320 always, until printhead 111 tangent with printing rubber roller 12 after, the second roller 320 just relative first roller 310 is separated.Namely, in handoff procedure, paper is clamped by printhead 111 and printing rubber roller 12 and/or the first roller 310 and the second roller 320, therefore can avoid paper play.
Preferably, in other embodiments provided by the invention, first changeover module 3 can also comprise the first flexible member, one end of first flexible member is connected with frame, the other end is connected with the first curved rod 31, under the effect of the first flexible member, the first curved rod 31 has relative gantry rotation all the time, makes the second roller 320 of the conveying roller group 300 being positioned at its one end remain the movement tendency that relative first roller 310 is separated.
Like this, when printing model, under the self gravitation acting in conjunction of the first flexible member and the first curved rod 31, the first curved rod 31 is gantry rotation relatively, drive the second roller 320 of conveying roller group 300 to move to the direction away from the first roller 310, relative first roller 310 of the second roller 320 is separated.
When moving back paper matrix formula, under the effect of the 6th working face 22b of the second cam 22, the first curved rod 31 overcomes the relative gantry rotation of elastic force effect of the first flexible member, and the second roller 320 is coordinated with the first roller 310 is tangent.By arranging the first flexible member, the first roller 310 of conveying roller group 300 is made to be separated more reliable with the second roller 320.
It should be noted that, switching mechanism 400 can comprise one group of first changeover module 3, also two group of first changeover module 3 can be comprised, when switching mechanism comprises one group of first changeover module 3, one end of the first curved rod 31 is connected with the axial middle part of the first roller 310 of conveying roller group 300 or the second roller 320; When switching mechanism 400 comprises two groups of first changeover modules 3, the bilateral symmetry that this two group of first changeover module 3 lays respectively at printing mechanism 100 width is arranged, and the first curved rod 31 of this two group of first changeover module 3 is connected with the first roller 310 of conveying roller group 300 or the two ends of the second roller 320 respectively.
It should be noted that, when switching mechanism comprises two groups of first changeover modules 3, switching mechanism 400 can comprise one group of double-linked cam 2, also can comprise two groups of double-linked cams 2.
When switching mechanism 400 comprises one group of double-linked cam 2, first axle 32 of two group of first changeover module 3 is same part, first curved rod 31 of two group of first changeover module 3 is all fixedly connected with the first axle 32, and the first axle 32 is supported by frame, can around self axial rotation, therefore the first curved rod 31 of two group of first changeover module 3 can frame synchronous axial system relatively.
Double-linked cam 2 is connected with a group in two group of first changeover module 3, two the first curved rod 31 synchronous axial system of two group of first changeover module 3 can be made by the first axle 32, thus the first roller 310 of conveying roller group 300 or the two ends of the second roller 320 can be made to be lifted simultaneously or to put down, make paper sheet delivery more steady; When switching mechanism 400 comprises two groups of double-linked cams 2, two groups of double-linked cams are positioned at printing mechanism both sides, be fixedly connected with by rotating shaft 23, now two group of first changeover module comprises the first axle 32 respectively, two groups of double-linked cams are connected with two group of first changeover module respectively, two groups of double-linked cam synchronous axial system, can drive the relative frame synchronous axial system of the first curved rod of two group of first changeover module.
Preferably, in other embodiments provided by the invention, second changeover module 4 can also comprise the second flexible member, one end of second flexible member is connected with frame, and the other end is connected with the second curved rod 41, under the effect of the second flexible member, second curved rod 41 has relative gantry rotation all the time, the 3rd of second curved rod 41 effect end 41b is moved to the direction close to fixed head 112, thus by fixed head 112 jack-up, makes the movement tendency that printhead 111 is separated with printing rubber roller 12.
Like this, when printing model, under the acting in conjunction of both the second flexible member and double-linked cam 2, second curved rod 41 is gantry rotation relatively, second curved rod 41 and the 3rd curved rod 42 overcome the elastic force of flexible member 113, by fixed head 112 to away from printing rubber roller 12 direction jack-up, the relative printing rubber roller 12 of printhead 111 is separated.By arranging the second flexible member, printhead 111 can be made to be separated more reliable with printing rubber roller 12.
The carbon ribbon that thermal transfer printer uses is polychrome carbon ribbon, and Fig. 8 is according to polychrome carbon ribbon schematic diagram of the present invention.As shown in Figure 8, along carbon ribbon length direction, be followed successively by the multiple colors such as the first color (as redness), the second color (as yellow), the third color (as blueness).When thermal transfer printer uses polychrome carbon ribbon to print, first complete the first color print, then printhead is separated with printing rubber roller, paper is retracted into original position by conveying roller group, carry out the second color print, by that analogy, until after completing the printing of all colours, paper exports by printer, completes printing.
For double-colored carbon ribbon in the present embodiment, composition graphs 2, Fig. 5-Fig. 7 introduce the course of work of the thermal transfer printer that the present embodiment provides.
Thermal transfer printer is when printing the first color, the controller of thermal transfer printer controls the electric machine rotation of switching mechanism 400, thermal transfer printer is made to be positioned at printing model, now, printhead 111 coordinates with printing rubber roller 12 is tangent, first roller 310 of conveying roller group 300 is separated with the second roller 320, printing rubber roller 12 and recovery axle 220 are driven to rotate along clockwise direction, printing rubber roller 12 is to printing mechanism 100 downstream conveying paper and carbon ribbon, reclaim axle 220 to be wound around with the carbon ribbon crossed on their outer circumference, simultaneously, the heating element generating heat of printhead 111, the first color dye of carbon ribbon coating is transferred on paper and forms image or word.
After completing the first color print, the controller of thermal transfer printer controls the electric machine rotation of switching mechanism 400, thermal transfer printer is switched to by printing model and moves back paper matrix formula, wherein, time in handoff procedure, printhead 111 clamps paper with printing rubber roller 12 and/or the first roller 310 with the second roller 320, and when effectively can avoid switching, play appears in paper.
After being switched to and moving back paper matrix formula, printhead 111 is separated with printing rubber roller 12, first roller 310 of conveying roller group 300 and the second roller 320 tangent cooperation clamping paper, second roller 320 is driven to rotate in the counterclockwise direction, printing rubber roller 12 and recovery axle 220 stop operating, and paper is carried, until fall back on printing initiating position by printing mechanism 100 updrift side, now only having the first roller 310 and the second roller 320 to clamp paper, therefore can avoiding the problem occurring when moving back paper striving paper or heap paper.
Then, the motor that controller controls switching mechanism 400 is rotated further, and makes thermal transfer printer be switched to printing model by moving back paper matrix formula, wherein, in handoff procedure, printhead 111 and printing rubber roller 12 and/or the first roller 310 and the second roller 320 clamp paper, can avoid paper play equally.
After printhead 111 is tangent with printing rubber roller 12, printing rubber roller 12 and recovery axle 220 are driven to rotate along clockwise direction, paper is carried to printing mechanism 100 downstream by printing rubber roller 12, reclaim axle 220 to be wound around with the carbon ribbon crossed on their outer circumference, simultaneously, the heating element generating heat of printhead 111, image or word is formed on the second look dye transfer to paper of carbon ribbon coating, complete printing, printer controls printing rubber roller 12 and is rotated further, paper is sent printer, in the process, paper is clamped by the printhead 111 of tangent cooperation and printing rubber roller 12 and is carried, can avoid equally striving paper or heap paper problem.
The present embodiment provides the thermal transfer printer with multi-color printing function, by arranging switching mechanism, make tangent with printing rubber roller at printhead or be separated, the first roller of conveying roller group is tangent with the second roller or in the handoff procedure that is separated, all the time printhead and printing rubber roller and/or the first roller and the second roller is had to clamp paper, therefore paper play can be avoided, and at printing paper feed or when moving back paper, clamp paper by the first roller of printhead and printing rubber roller or conveying roller group and the second roller, therefore efficiently avoid and strive the problem such as paper or heap paper.
Fig. 9 is thermal transfer printer according to a second embodiment of the present invention structural representation when being in printing model.As shown in the figure, the present embodiment is compared with a upper embodiment, and difference is that in the present embodiment, the second changeover module 4 supports the two ends of printing rubber roller 12, and printing rubber roller 12 can around own axis.Under the effect of double-linked cam 2, the second changeover module 4 drives printing rubber roller 12 relatively gantry motion, with the tangent cooperation of printhead 111 or be separated.
Figure 10 is the schematic diagram of the double-linked cam of the thermal transfer printer shown in Fig. 9.As shown in the figure, in the present embodiment, first of the first cam 21 closely repaiies only angle a1 and second of the second cam 22 and only closely repaiies that angle b1 is stacked, and first of the first cam 21 is far repaiied second of only angle a2 and the second cam 22 and far repaiied that to stop b2 position, angle part stacked; First motion angle for actuating travel a3 of the first cam 21 and the second motion angle for actuating travel b3 of the second cam 22 is stacked, first motion angle for return travel a4 of the first cam 21 and the second motion angle for return travel b4 of the second cam 22 is stacked, and a3 > b4, a4 > b3.
As shown in Figure 9, first effect end 31a of the first curved rod 31 of the first changeover module 3 is connected with the second roller 320 of conveying roller group 300, and the first curved rod 31 has the 5th position making the second roller 320 and the tangent cooperation of the first roller 310 and the 6th position that the second roller 320 is separated with the first roller 310; One end that second curved rod 41 of the second changeover module 4 is respective with the 3rd curved rod 42 is connected with the two ends of printing rubber roller 12 respectively, and the second curved rod 41 and the 3rd curved rod 42 have the 7th position that printing rubber roller 12 is separated with printhead 111 and make the tangent 8 positions coordinated of printing rubber roller 12 and printhead 111.Thermal transfer printer is when printing the first color, and the controller of thermal transfer printer controls the electric machine rotation of switching mechanism 400, makes thermal transfer printer be in printing model.Now, second working face 21b of the first cam 21 drives the second curved rod 41 to be in 8 positions, the printing rubber roller 12 be connected with the other end of the second curved rod 41 and the 3rd curved rod 42 is coordinated with printhead 111 is tangent, simultaneously, 5th working face 22a of the second cam 22 drives the first curved rod 31 to be in the 6th position, and the second roller 320 being positioned at first curved rod 31 other end is separated with the first roller 310.
Printing rubber roller 12 and recovery axle 220 are rotated by driving, printing rubber roller 12 is to printing mechanism 100 downstream conveying paper and carbon ribbon, reclaim axle 220 to be wound around with the carbon ribbon crossed on their outer circumference, simultaneously, the heating element generating heat of printhead 111, is transferred to the first color dye of carbon ribbon coating on paper and forms image or word.
After completing the first color print, the controller of thermal transfer printer controls the electric machine rotation of switching mechanism 400, thermal transfer printer is switched to by printing model and moves back paper matrix formula, namely printhead 111 and the printing rubber roller 12 of printing mechanism 100 are switched to from tangent cooperation and are separated, and the first roller 310 of conveying roller group 300 is switched to tangent cooperation with the second roller 320 by being separated.
Figure 11 is the thermal transfer printer shown in Fig. 9 by printing model to the transient process schematic diagram moving back paper matrix formula and switch.As shown in figure 11, the motor of double-linked cam 2 drives duplicate gear 20 to press direction initialization (as clockwise direction in figure) and rotates, 7th working face 22c of the second cam 22 acts on first of the first curved rod 31 and holds 31a to contact, the first curved rod 31 is driven to rotate around the first axle 32, the second roller 321 be connected with the first curved rod 31 is moved near the first roller 310 direction, simultaneously, 4th working face 21d of the first cam 21 drives the second curved rod 41 and the 3rd curved rod 42 to rotate centered by the second axle 43, the printing rubber roller 12 be connected with the second curved rod 41 and the 3rd curved rod 42 is moved to away from printhead 111 direction.
The second motion angle for actuating travel b3 due to the second cam 22 is less than the first motion angle for return travel a4 of the first cam 21, therefore after double-linked cam 2 rotates b3 angle, first the second roller 310 of conveying roller group 300 is driven to coordinate with the first roller 310 is tangent by the 7th working face 22c of the second cam 22, after double-linked cam 2 is rotated further (a4-b3) angle, then the second curved rod 41 is driven to drive printing rubber roller 12 to be separated with printhead 111 with the 3rd curved rod 42 by the 4th working face 21d of the first cam 21, like this, at printhead 111 and printing rubber roller 12 by switching in the handoff procedure that is separated mutually, paper is after being clamped by the first roller 310 and the second roller 320, printing rubber roller 12 is just separated with printhead 111, namely in handoff procedure, paper is clamped by printhead 111 and printing rubber roller 12 and/or the first roller 310 and the second roller 320 always, therefore paper play can be avoided.
When thermal transfer printer by printing model to moving back after paper mode handover procedure completes, now paper is transferred the first roller 310 of roller group 300 and the second roller 320 clamps.Figure 12 is that the thermal transfer printer shown in Fig. 9 is in the schematic diagram moving back paper matrix formula.As shown in figure 12, motor drives double-linked cam 2 to be rotated further set angle, first working face 21a of the first cam 21 drives the second curved rod 41 to be in the 7th position, make to be connected to the second curved rod 41 to be separated with printhead 111 with the printing rubber roller 12 of the 3rd curved rod 42 other end, now print head assembly 11 is by the effect of flexible member 113, to printing rubber roller 12 direction bias voltage, until be overlapped in the locating part (not shown) in frame, print head assembly 11 position stability.
6th working face 22b of the second cam 22 drives the first curved rod 31 to be in the 5th position, and the second roller 320 being connected to first curved rod 31 other end is coordinated with the first roller 310 is tangent.Now thermal transfer printer is in and moves back paper matrix formula, and namely printing rubber roller 12 is separated with printhead 111, and the first roller 310 of conveying roller group 300 coordinates with the second roller 320 is tangent.
After thermal transfer printer is in and moves back paper matrix formula, paper is clamped by the first roller 310 and the second roller 320, second roller 320 of the controller control conveying roller group 300 of thermal transfer printer rotates backward, and drives the first roller 310 to rotate thereupon, paper is returned to printing initial position.
After paper is returned to printing initial position by conveying roller group 300, the controller of thermal transfer printer controls switching mechanism, it is made to switch to printing model by moving back paper matrix formula, namely printhead 111 switches to tangent cooperation with printing rubber roller 12 by being separated, and the first roller 310 of conveying roller group 300 and the second roller 320 are switched to by tangent cooperation and be separated.
Figure 13 is the thermal transfer printer shown in Fig. 9 by the transient process schematic diagram moving back paper matrix formula and switch to printing model.As shown in figure 13, motor continues to drive double-linked cam 2 to rotate, 3rd working face 21c of the first cam 21 abuts with the 3rd contact jaw 41a of the second curved rod 41, and drive the second curved rod 41 and the relative gantry rotation of the 3rd curved rod 42, the printing rubber roller 12 be connected with the second curved rod 41 and the 3rd curved rod 42 is moved to printhead 111 direction, simultaneously, 8th working face 22d of the second cam 22 abuts with the first contact jaw 31a of the first curved rod 31, and drive the first curved rod 31 gantry rotation relatively, the second roller 320 be connected with the first curved rod 31 is moved to away from the first roller 310 direction.
The first motion angle for actuating travel a3 due to the first cam 21 is greater than the second motion angle for return travel b4 of the second cam 22, therefore double-linked cam 2 rotates b4 angle, first the second curved rod 41 and the 3rd curved rod 42 is driven to rotate by the 3rd working face 21c of the first cam 21, after making printing rubber roller 12 and printhead tangent, double-linked cam 2 is rotated further (a3-b4) angle, then drive the first curved rod 31 to rotate by the 8th working face 22d of the second cam 22, make printing rubber roller 12 opposed print heads 111 tangent.
Like this, at printing rubber roller 12 with printhead 111 by being separated in the tangent handoff procedure coordinated, paper is clamped by the first roller 310 and the second roller 320 always, until printing rubber roller 12 tangent with printhead 111 after, second roller 320 just relative first roller 310 is separated, namely, in handoff procedure, paper is clamped by printhead 111 and printing rubber roller 12 and/or the first roller 310 and the second roller 320 all the time, therefore can avoid paper transmission.
In the present embodiment, printing rubber roller moves relative to printhead, to reach in handoff procedure printhead and printing rubber roller and/or the first roller and the second roller equally and clamp paper, and printing paper feed or only have printhead and printing rubber roller or the first roller and the second roller to clamp the object of paper when moving back paper.
It is to be noted, the printhead of printing mechanism and printing rubber roller be separated and tangent cooperation can be controlled by a switching mechanism individually, first roller of conveying roller group and the second roller be separated and tangent cooperation can be controlled by another switching mechanism individually, the assembled state of two switching mechanisms and the sequencing of switching can be controlled by controller.In the above-described embodiments, switching mechanism is realized by cam swing mechanism, and in other embodiments, switching mechanism can be realized by electric cylinder, cam follower mechanism etc.
By describing above and can finding out, thermal transfer printer provided by the invention, when carrying out multi-color printing, can avoid paper play in paper sheet delivery process, can avoid again striving the problem such as paper, heap paper, improves the reliability of thermal transfer printer.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. there is a thermal transfer printer for multi-color printing function, it is characterized in that, comprising:
Printing mechanism (100), comprise print head assembly (11) and printing rubber roller (12), wherein, described print head assembly (11) comprises the printhead (111) be oppositely arranged with described printing rubber roller (12), and described printing mechanism has the released state that the tangent printing feed status that coordinates of described printing rubber roller and described printhead and described printing rubber roller and described printhead are separated;
Carbon ribbon mechanism (200), comprises and provides axle (210) and recovery axle (220), wherein, carbon ribbon from described granting axle, between described printhead and printing rubber roller, backrush is on described recovery axle;
Conveying roller group (300), comprise the first roller (310) and the second roller (320), wherein, described conveying roller group has the released state that the tangent printing paper feed status that coordinates of described first roller and the second roller and described first roller and the second roller are separated; And
Switching device shifter (400), for making described printing mechanism be in described printing feed status and make described conveying roller group be in described released state when printing model; Make described printing mechanism switch to described released state by described printing feed status and make described conveying roller group switch to described printing paper feed status by described released state when moving back paper matrix formula,
Described switching device shifter (400) also for moving back paper matrix formula or switch in the handoff procedure of described printing model by described paper matrix formula of moving back described in being switched to by described printing model, one keep-process is provided, in described keep-process, described printing mechanism (100) and/or described conveying roller group (300) clamping paper.
2. the thermal transfer printer with multi-color printing function according to claim 1, it is characterized in that, described print head assembly (11) comprises and being articulated in frame for installing the fixed head (112) of described printhead (111) and the flexible member (113) to described fixed head (112) bias voltage, wherein, the printhead (111) on described fixed head (112) has the trend to the deflection of described printing rubber roller (12) direction.
3. the thermal transfer printer with multi-color printing function according to claim 2, is characterized in that, described switching device shifter (400) comprising:
First curved rod (31), around the axis oscillating of the first axle (32) in described frame, wherein, second roller (320) of described conveying roller group is connected with the first end of described first curved rod (31), and described first curved rod (31) has the primary importance making described second roller (320) and the first roller (310) tangent cooperation and the second place that described second roller (320) is separated with the first roller (310);
Second curved rod (41), around the axis oscillating of the second axle (43) in described frame, wherein, described print head assembly (11) also comprises the support sector (112d) abutted against with the first end of described second curved rod (41), described second curved rod (41) has its first end and compresses the 3rd position that described support sector (112d) makes described printhead (111) be separated with described printing rubber roller (12) and make tangent the 4th position coordinated of described printhead (111) and described printing rubber roller (12), and
Double-linked cam (2), comprise the first cam (21) and the second cam (22) that are coaxially fixedly connected with, described first cam (21) has and abuts with the second end of described second curved rod (41) the control wheel face coordinated, described second cam (22) has and abuts with the second end of described first curved rod (31) the control wheel face coordinated
Wherein, the control wheel face of described first cam (21) and the control wheel face of the second cam (22) comprise two kinds of assembled state: make described first curved rod (31) be in described primary importance and make described second curved rod (41) be in described 3rd position; Make described first curved rod (31) be in the described second place and make described second curved rod (41) be in described 4th position.
4. the thermal transfer printer with multi-color printing function according to claim 3, it is characterized in that, the control wheel face of described first cam (21) and the control wheel face of the second cam (22) also comprise other two kinds of assembled state: after ordering about described second curved rod (41) and being rocked to described 4th position, order about described first curved rod (31) be again rocked to the described second place; And after ordering about described first curved rod (31) and being rocked to described primary importance, order about described second curved rod (41) be again rocked to described 3rd position.
5. the thermal transfer printer with multi-color printing function according to claim 3, it is characterized in that, described switching device shifter also comprises makes described first curved rod (31) return back to the first flexible member of the described second place and make described second curved rod (41) return back to the second flexible member of described 3rd position.
6. the thermal transfer printer with multi-color printing function according to claim 1, is characterized in that, described printing rubber roller (12) is moveable relative to the position of described print head assembly (11).
7. the thermal transfer printer with multi-color printing function according to claim 6, is characterized in that, described switching device shifter (400) comprising:
First curved rod (31), around the axis oscillating of the first axle (32) in described frame, wherein, second roller (320) of described conveying roller group (300) is connected with the first end of described first curved rod (31), and described first curved rod (31) has the 5th position making described second roller (320) and the first roller (310) tangent cooperation and the 6th position that described second roller (320) is separated with the first roller (310);
Second curved rod (41), around the axis oscillating of the second axle (43) in described frame, wherein, described printing rubber roller (12) is connected with the first end of described second curved rod (41), and described second curved rod (41) has the 7th position that described printing rubber roller (12) is separated with described printhead (111) and makes described printing rubber roller (12) 8 positions that coordinate tangent with described printhead (111); And
Double-linked cam (2), comprise the first cam (21) and the second cam (22) that are coaxially fixedly connected with, described first cam (21) has and abuts with the second end of described second curved rod (41) the control wheel face coordinated, described second cam (22) has and abuts with the second end of described first curved rod (31) the control wheel face coordinated
Wherein, the control wheel face of described first cam (21) and the control wheel face of the second cam (22) comprise two kinds of assembled state: make described first curved rod (31) be in described 5th position and make described second curved rod (41) be in described 7th position; Make described first curved rod (31) be in described 6th position and make described second curved rod (41) be in described 8 positions.
8. the thermal transfer printer with multi-color printing function according to claim 7, it is characterized in that, the control wheel face of described first cam (21) and the control wheel face of the second cam (22) also comprise other two kinds of assembled state: order about described first curved rod (31) again after after ordering about described second curved rod (41) and being rocked to described 8 positions and be rocked to described 6th position; And be rocked to the 7th position to ordering about described second curved rod (41) again after described 5th position ordering about described first curved rod (31) pendulum.
9. the thermal transfer printer with multi-color printing function according to claim 7, it is characterized in that, described switching device shifter (400) also comprises makes described first curved rod (31) return back to the 3rd flexible member of described 6th position and make described second curved rod (41) return back to the 4th flexible member of described 7th position.
10. the thermal transfer printer with multi-color printing function according to claim 1, it is characterized in that, described switching device shifter (400) comprises makes described printing mechanism be in the first switching mechanism of printing feed status or released state and make described conveying roller group be in the second switching mechanism of described printing paper feed status or released state.
11. 1 kinds of Method of printings with the thermal transfer printer of multi-color printing function, comprise printing step and move back paper step, it is characterized in that,
In described printing step, the printhead of printing mechanism and printing rubber roller are in and print feed status and make the first roller of conveying roller group and the second roller be in released state, and
Move back in paper step described, make the printhead of described printing mechanism and printing rubber roller switch to released state by described printing feed status and make the first roller of described conveying roller group and the second roller switch to printing paper feed status by described released state,
Also comprise the First Transition step of moving back paper step described in described printing step switches to and move back by described the second transition step that paper step switches to described printing step, wherein,
In described First Transition step and the second transition step, described printing mechanism and/or described conveying roller group is made to clamp described paper all the time, to avoid paper play.
12. Method of printings according to claim 11, is characterized in that,
In described First Transition step, after the first roller of described conveying roller group and the second roller switch to described printing paper feed status by described released state, the printhead of described printing mechanism and printing rubber roller is made to switch to described released state again;
In described second transition step, after the printhead of described printing mechanism and printing rubber roller switch to described printing feed status by described released state, the first roller of described conveying roller group and the second roller is made to switch to described released state again.
CN201110269752.4A 2011-09-13 2011-09-13 Thermal transfer printing printer with multi-color printing function and printing method Active CN102991140B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201110269752.4A CN102991140B (en) 2011-09-13 2011-09-13 Thermal transfer printing printer with multi-color printing function and printing method
PCT/CN2012/081023 WO2013037274A1 (en) 2011-09-13 2012-09-05 Heat-transfer printer having multi-colour printing function and printing method

Applications Claiming Priority (1)

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