CN1083340C

CN1083340C - Dual inkjet pen carriage system

Info

Publication number: CN1083340C
Application number: CN96102433A
Authority: CN
Inventors: J·A·克里斯蒂森; R·A·凯利
Original assignee: Hewlett Packard Co
Current assignee: HP Inc
Priority date: 1995-03-02
Filing date: 1996-02-26
Publication date: 2002-04-24
Anticipated expiration: 2016-02-26
Also published as: DE69529779D1; EP1234679A2; EP0729844B1; DE69519790D1; DE69519790T2; EP1018436B1; KR100402568B1; EP1018436A2; DE69529779T2; EP1234679A3; EP1234679B1; EP1018436A3; CN1138527A; EP0729844A1; DE69534328D1; KR960033762A; JP3856864B2; DE69534328T2; JPH08244230A

Abstract

A dual pen carriage system supports a pair of inkjet pens in an inkjet printing mechanism. A carriage body defines a pair of pen chambers, separated by a main alignment wall, for receiving the pens. The main wall defines at least one first direction alignment datum in each chamber. A reference rod extends through both chambers to define pen alignment datums in two orthogonal directions, which are orthogonal to the first direction. The body supports an adjustment member that selectively engages a rotational registration member along the main wall to simultaneously adjust the angular alignment of each pen chamber. A latch mechanism coupled to the carriage body applies, upon closing, a controlled force to a latching land on each pen to push the pens into contact with the datums.

Description

Dual inkjet pen carriage system

The present invention relates generally to a kind of inkjet printing mechanism, more particularly relate to a kind of dual inkjet pen carriage system, it can make two pens accurately calibrate, in order to scan on the print zone of this mechanism, to print high-quality image.

What ink-jet printer adopted is the pen that can penetrate pigment (generally being referred to as " ink " at this) drop on a page.Every pen all has one by the very little printhead that nozzle constituted, and ink droplet is promptly launched by nozzle.When wanting print image, this printhead advances before and after the page, and along with motion is penetrated ink droplet by required mode.Specific inkjet mechanism can be taked a kind of in various multi-form well known in the art in the printhead, and for example those adopt piezoelectricity or thermal printer head technology patterns.For example, two kinds of early stage hot inkjet mechanisms are disclosed in U.S. Patent No. 5,278, in 584 and 4,683,481, all transfer this assignee-Hewlett-Packard.In a hot system, the barrier layer of a band ink container and vaporization chamber is arranged between nozzle plate and basic unit.Several rows of heating element heater (for example resistance) is arranged in this typical basic unit, can be to its energising with the ink in vaporization chamber heating, in case heating, ink droplet promptly penetrates from the nozzle that links with energising resistance.Along with printhead moves along the page, by giving each resistance charging selectively, ink is promptly discharged in some way and is dropped on the print media, to form required image (for example picture, chart or literal).

Clear up and maintain printhead, be typically on the printhead chassis " all-in-service station " mechanism of installing, so printhead is movable in the all-in-service station and keeps in repair.When harvesting is got up, or during not printing, this all-in-service station has a calotte system usually, and it seals print-head nozzle, makes it to keep wetting, prevents to pollute and drying.The design of some calotte also is convenient to carry out start and is prepared, and for example can be connected to the pump that printhead vacuumizes with one.In operating process, the obturator in the printhead will periodically be cleared up, and method is to penetrate several melted inks from each nozzle, process that Here it is well-known " shooing out ", and useless ink collection is in one " spittoon " storage tank portion of all-in-service station.After shooing out, opening calotte, or sometimes in print procedure, must there be a synthetic rubber erasing device in all-in-service station, and its can wiping print head surface, removing residual ink, and any paper scrap or other chip that stockpiles in printhead.

For definition and the contrast that improves print image, recent research concentrate on improve ink originally on one's body.For print image more firm, more water insoluble and that black is more black is provided, developed the black ink of pigment for base.These pigment will be higher than the ink of early stage dyestuff for base for the solid component concentration of the ink of base.These two kinds of inks can both very fast drying, so just can make inkjet printing mechanism use common paper.In order to provide black more black, colored more lively print image hard copy, a black pen and independent one three coloured pencil are all adopted in the design of printer now, or the pastel of a black pen and four monochromes is used in combination.

A kind of early stage printer adopts four independent pens, carries black, bluish-green, deep red red and yellow ink respectively, makes the balladeur train structure of these four pen calibrations that six benchmark be arranged, and it goes up relevant benchmark and matches with each.The required benchmark in location of control pen is on following three mutually perpendicular directions:

1. printhead scanning direction (X-axis),

The direction of advance of paper (Y-axis) and

3. vertical direction (Z axle).

As everyone knows, it is θ-Z error that the another kind of pen does not align phenomenon, and it refers to pen and reverses with respect to the angle of Z axle.θ-Z error shows as the zigzag error of print image, and it is rows of nozzles of printhead and the uneven result of Y direction that paper advances.

In order to make pen keep calibration appropriate, the designing requirement pen of early stage four printers and balladeur train all have very accurate tolerance.But unfortunately, the economic molded part of desired tolerance employing is unavailable.Therefore, all benchmark of balladeur train all have to carry out machined, and for every pen, and machined is carried out in three requirements in six benchmark, and with only being that the benchmark that is molded into is compared, this secondary operations effort is expensive.

Four early stage balladeur trains are with an X bias spring pen to be positioned on the X benchmark, also have the flexure member of the cam that a band inserts in molded mode, and it applies necessary power to the clamping surface of pen, make to be placed in securely on X, Y and the Z benchmark.In order to obtain required performance level, used X bias spring requires expensive secondary machining operation, comprises heat treatment and coating in the design of this early stage four printers but unfortunately.This early stage balladeur train has adopted electrical interconnection mechanism, and it will transmit and pass to pen by balladeur train, and it also provides and makes pen be placed in upward necessary power of one of Y axis datum securely.

For pen is installed, the used grasping system of this early stage four printers requires operating personnel to promote and rotates each, is stuck on the position up to it.This embedded design requires operating personnel to overcome the interior frictional force of balladeur train, and it causes through regular meeting has uneven or horizontal masterpiece to be used on the pen during insertion.Unfortunately, these difficulties of installing may hinder the benchmark snugly of pen to drop on the corresponding benchmark of balladeur train.This incorrect the laying of pen can be reduced print quality because nozzle no longer with balladeur train in other pen harmonious.

In two systems of a black pen of an employing and one second three coloured pencil, balladeur train must be for providing accurately and the location that can reproduce between pen and the pen and between pen and whole print system.The accurate location of pen is the basic variable that the control inkspot aligns on paper, and it directly influences print quality.In addition,, need to make pen to be easy to change, guarantee when the benchmark with pen is placed on the balladeur train benchmark, to have the repeatability of height simultaneously for the balladeur train grasping system.Have again, also need it to be implemented in for more economical equal carriage system and make the alignment tolerance of pen be equivalent to four early stage printer Design under the situation of not carrying out secondary machine.Like this, just need the carriage system of ink-jet pen be improved, in printing, to keep the calibration of printhead.

According to an aspect of the present invention, provide a kind of pair of pen carriage system, it can make a pair of ink-jet pen scan along the print zone of inkjet printing mechanism.This carriage system has a balladeur train body, has a main wall that is clipped between a pair of pen.This main wall has two opposite flanks, and each determines at least one benchmark.This cunning shell system also has one by the biasing mechanism that this body supported, and contacts with benchmark on the main wall to push each.

According to another aspect of the present invention, two pen carriage systems have a balladeur train body, and it has two sidewalls, hold a pair of pen therebetween, this carriage system also have one between the two side, extend with reference to bar, contacting, and it is calibrated on two orthogonal directions with pen.

According to another aspect of the invention, two pen carriage systems have a balladeur train body, and it has a pair of chamber, in order to hold a pair of pen.This chamber is kept apart by main wall, and this main wall has a rotation aligned portions.This carriage system also has one by the regulating part that body supported, and to engage with aligned portions selectively, the calibration of each chamber on the angular direction is regulated simultaneously.

According to a further aspect of the invention, provide a pair of pen carriage system, it can make a pair of ink-jet pen scan in the print zone of inkjet printing mechanism, and each all have a printhead and with printhead opposite surfaces, this surface upper support one locking shoulder.This carriage system has a balladeur train body, and its structure is suitable for holding a pair of pen, and this has a plurality of benchmark on one's body pen, to contact with every pen and to make its calibration.This carriage system also has a blocking mechanism that connects mutually with the balladeur train body controlled force to be applied on the locking shoulder of each closing on the selected direction of Shi Yiyi, contacts with benchmark to push each.

In embodiment as shown in the figure, above-mentioned various aspects are combined constitutes two pen carriage systems of a uniqueness, can be used for ink-jet printer.

According to a further aspect in the invention, be provided at the method for the accurate a pair of ink-jet pen of the lieutenant colonel of inkjet printing mechanism.Best, on the pen reference side surface is arranged, it determines a benchmark of at least one first direction; With a upper surface, it determines second and a benchmark of third direction, and first, second and third direction are orthogonal.This method comprises the step of penholder being gone into carriage system, and this carriage system has the body with main wall.This main wall has two relative sides, has determined at least one first direction benchmark separately.This carriage system also has one with reference to bar, and it determines second and the third direction benchmark.Form in the interlayer step one, main wall is sandwiched between the reference side of pen.Promote in the step one, pen is pushed, and is pressed against on the benchmark of first, second and third direction.

General purpose of the present invention provides one and uses a pair of ink-jet pen that the inkjet printing mechanism of high-quality hard copy output is provided.

Another object of the present invention provides a dual inkjet pen carriage system, and it is applicable to the pen of being made by moulded parts and does not sacrifice print quality, thereby economic inkjet printing mechanism is provided.

A further object of the present invention provides a kind of accurate Calibration Method of a pair of pen that makes in the printing mechanism.

Now introduce above-mentioned purpose of the present invention, structure, method and characteristics in detail by the description of following relevant drawings and the specific embodiments.Wherein:

Fig. 1 is the perspective view that has adopted the part of inkjet printing mechanism of the dual inkjet pen carriage system of a kind of form of the present invention to remove;

Fig. 2 is the front perspective view of the dual inkjet pen carriage system shown in Fig. 1, and two pens and the blocking device situation when opening is being controlled in its expression;

Fig. 3 is the rear perspective of two pens shown in Fig. 1, its represent they one be arranged in situation in the carriage system by a ground;

Fig. 4 is the front perspective view of two pens shown in Fig. 1, its represent they one be arranged in situation in the carriage system by a ground;

Fig. 5 and Fig. 6 are the front perspective view of the carriage system shown in the Fig. 1 that gets from two different angles, and wherein pen takes down, with the different characteristics in an expression chamber;

Fig. 7 is the bottom perspective view of the carriage system shown in Fig. 1, and wherein pen takes down; With

Fig. 8 is the bottom perspective view of the carriage system shown in Fig. 1, and its expression is controlling that two pens and a blocking device are closed so that the situation when printing.

Fig. 1 shows an embodiment who adopts the inkjet printing mechanism of the present invention's formation, and with ink-jet printer 20 expressions, it is used in industry, office, family or other occasion and prints business report, letter, desktop publishing thing and similar file at this.Can buy now various types of inkjet printing mechanism on the market, for example, some may adopt printing mechanism of the present invention to comprise plotter, pocket printing equipment, copier, camera, vision signal printer and facsimile machine etc.For simplicity, notion of the present invention is illustrated as ink-jet printer 20 at this.

Clearly, although the parts of different model printer can change to some extent, typical ink-jet printer 20 comprises a chassis 22, and there is general shell, outer container or outer cover 24 made of plastic its outside.Many print media are infeeded by print media induction system 26 by print zone 25.Print media can be any type of flaky material that is suitable for, as paper, card, transparent film, polyester film and similar substance, but for convenience's sake, to the explanation of as shown in the figure embodiment with paper as print media.Print media induction system 26 is deposited the sheet feed stacker 28 that paper is used before a printing is arranged.The print media (as shown being paper 35) that can adopt a series of common paper live-roller (not shown) that driven by a stepper motor 30 and driving gear component 32 will be positioned under the paper guide 34 is sent into print zone 25 so that print from paper disc 28.After the printing, the paper 35 that motor 30 will be printed is delivered to the dry thumbpiece 36 of a pair of telescopic output.Be recovered to before the paper of will be newly printing falls into output panel 38 1 sides, the paper that blade 36 temporarily will newly be printed control make it to be in the output panel 38 paper of printing previously in drying still above.Media feed system 26 can comprise a series of governor motions, for example slidingtype length adjustment bar 40, slidingtype width adjusting bar 42 and slidingtype envelope feed plate 44, to adapt to the print media of different size, comprise Unite States Standard letter paper, lawyer's paper for copying document, A4, envelope etc.

Printer 20 also has one to print machine controller, is expressed as to meaning property microprocessor 45 as shown, and it accepts the instruction of main equipment, and typical main equipment is a computer, for example the personal computer (not shown).Printer controller 45 also can carry out work by the input signal that the keyboard on the outside that is positioned at casing 24 provides according to the user.The monitor that links with main frame can be used to the information into operating personnel's display of visually, for example the state of printer or the specific program that just moving on main frame.Personal computer and input equipment thereof, as keyboard and (or) mouse, and monitor is well-known for the professional in present technique field.

Balladeur train guide rod 48 is supported by chassis 22, and it is slidably supporting the dual inkjet pen carriage system 50 that constitutes according to the present invention, and it is moved forward and backward along print zone 25.As shown in arrow 52, balladeur train 50 also can be pushed into maintenance area in the inside that is in casing 24 along guide rod 48.As shown in Figure 2, balladeur train 50 has pair of bearings 54, and they are slidably supporting balladeur train, and balladeur train can be moved along guide rod 48.This balladeur train also has a roller 55 that 22 side surface rolls along the chassis.Roller 55 is with pair of bearings 54, for balladeur train provides a supported at three point system.Bearing 54 is the V-type groove bearing preferably, and for example U.S. Patent No. 5,366, and disclosed the sort of in 305, this patent has transferred Hewlett-Packard--assignee of the present invention.One balladeur train d.c. motor 56 is connected on the travelling gear 57, to drive an endless belt 58.Motor 56 carries out work according to the control signal that slave controller 45 receives.Endless belt 58 can utilize traditional mode to be fixed on the balladeur train 50, with the rotation according to motor 56 balladeur train is progressively advanced along guide rod 48.

In print zone 25, the ink that medium paper 35 is accepted from the ink-jet ink box, for example black ink box 60 and/or Color FINE Cartridge 62.Ink

cartridge

60 and 62 often is referred to as by those skilled in the art " pen ".Although can adopt a pair of independent monochromatic pen in certain embodiments, pastel 62 as shown in the figure is three coloured pencils.Though pastel 62 can hold the ink of certain pigmented, for illustrated purpose, described pen 62 fills the ink of three kinds of dye-based, as bluish-green, yellow and deep red red.Tusche water-color paintbrush 60 shown in herein is the ink that fills a kind of pigmented.Clearly, the ink of other type also can be used for

pen

60 and 62, as the ink of alkyl, and mixing or synthetic ink with dyestuff and the two characteristics of pigment.

As shown in the figure the

pen

60 and 62 each the storage ink reservoir is all arranged, be used for storing therein a certain amount of ink.Pen 60 and 62 has

printhead

64 and 66 respectively, and each printhead all has an aperture plate, and it has in the known mode of those skilled in the art of the present technique and passes its formed a plurality of nozzle.Although also can adopt the printhead of other type, as piezoelectric print head,

printhead

64 and 66 as shown in the figure is hot ink-jet print heads.In typical case,

printhead

64 and 66 comprises a plurality of resistance that link with nozzle.Along with giving certain selected resistance energising, just form a bubble, ejection one melted ink and being sprayed onto on the paper in the print zone 25 of nozzle below from nozzle.Give the energising of printhead resistance selectively, it is according to the firing order control signal of many conductor strip 58 outputs that connect controller 45 and print head carriage 50.

Consult shown in Figure 2ly, balladeur train 50 comprises a blocking mechanism, as shown in the figure be two clamping bars, latching member or claim to cover 70 and 72 that they are connected to the main part 75 of balladeur train in pivotable mode by hinge 74.Balladeur train main body 75 preferably also limits a thin calibration plate or claims main wallboard 76, and its thickness can be between 1.0-6.0mm (millimeter), but generally preferably about 3.5mm is thick.Main wallboard 76 is separated into a black chamber 80 and a crayon chamber 82 with the inside of main body 75.Discuss balladeur train be how to make the clamped and calibration of pen before, the effect of understanding various datum marks and cam face will be helpful, they are molded in the outside of

pen

60 and 62 easily.

Fig. 3 and Fig. 4 show front view and the rearview of

pen

60 and 62 from bottom observation respectively, and Fig. 2 is the front top view of pen.Black pen 60 has a hollow handwriting 84, and it forms a storage ink reservoir, is used to deposit a certain amount of ink, and ink will be gone out by the nozzle ejection in the printhead 64 selectively.Handwriting 84 comprises a neighboring part 85, and lateral wall 86 and madial wall 88 are wherein arranged.One inserts handle or holds face 90 between antetheca 92 and upper wall 94, is used for installing to balladeur train 50 in or from wherein taking out 60, very convenient.One base plate wall 95 is extended between the nose 96 of antetheca 92 and installation printhead 64.One rear wall 98 extends to form nose 96 downwards from upper wall 94.

Rear wall 98 is supporting a traditional flexible circuit board 100, has a plurality of circuit interconnects contact pin (for clarity sake not shown) on it, and they can be by the U.S. Patent No. 4,907 that transfers this assignee-Hewlett-Packard, the making of content described in 018.In this position, this flexible circuit board 100 can be extended easily, connects thereby form circuit with printhead 64.Preferably with handle 90,

peripheral wall

92,94,96,95 and 98, with and on printhead 64 is housed printhead assembly wall 102 all be molded as an independent global facility 85, it is very outstanding to do advantage like this, because can also be determined the location benchmark of one group of pen by these independent neighboring parts 85.

In embodiment as shown in the figure, neighboring parts 85 have been determined a plurality of X, Y, Z reference axis positioning element or benchmark.For illustrated purpose, in Fig. 1-8, provided X, a Y, Z coordinate system 103, wherein X-axis is pointed to the scanning direction, and it is parallel to the scan axis by guide rod 48 determined balladeur trains 50.Y-axis is parallel to the progress path of paper by printer 20.Z axle points upwards, and it is as the reference of a paper spacing, and it provides an important component of high-quality hard copy images.

For making pen 60 with respect to the X-axis location, circumferential component 85 best shape when molded is made the locating shoulder or the benchmark of three X-directions, and they are respectively: a benchmark 104 that is positioned near the X1 the nose 96; Benchmark 106, and a benchmark 108 that is positioned at the X3 at back last angle along the X2 of diapire 95 close antethecas 92.For determining pen 60 orientations with respect to the Z axle, circumferential component 85 has been made the Z benchmark 110 that is provided with along diapire 95.For determining that pen 60 orientations with respect to Y-axis have adopted two benchmark, they are respectively: the benchmark 112 of Y1 that depart from nose 96 and extend downwards from diapire 95; Benchmark 114 with a Y2 who stretches out from rear wall 98.In embodiment as shown in the figure, though the position of X benchmark 104,106 and 108 all on same sidewall 88, clearly, under some practical situations, neighboring parts 85 also can be determined the benchmark of similar location near outer wall 86 parts.

Neighboring parts 85 also define a locking shoulder 115, and it is to make out when moulding part 85, and it comprises the profile with oblique cam surface.As below will further introducing, this locking shoulder 115 is very useful aspect being contained in pen 60 in the balladeur train 50 securely.Locking shoulder 115 is near support member 116, and the benchmark 108 that this support member just is being used on to X3 provides a supporting surface.In embodiment as shown in the figure, tiltedly cam surface 115 when Y-axis deviates from circumferential component 85 horizontal expansions in the other direction, is that upwards (Z-direction) tilts with it.When oblique cam surface 115 during from the horizontal expansion of its side direction X-axis that combines with support member 116, its also downwards (the Z axle is reverse) tilt.The cam structure 115 of locking shoulder is positioned under the upper wall 90, and is provided with along the back upward angle or the shoulder 118 of circumferential component 85.As below will further introducing, circular bead surface 118 is for packing in balladeur train 50 or particularly useful from wherein taking out 60 in pen.

Pastel 62 as shown in the figure comprises neighboring parts 120, and it is clipped between madial wall 122 and the lateral wall 124 in illustrated embodiment, and they constitute the handwriting 125 of a hollow jointly.Hollow handwriting 125 is preferably formed as or installs three storage ink reservoirs, is used to store the ink (for example bluish-green, deep red red and yellow) of a certain amount of three kinds of looks, and they can eject selectively by the nozzle in the printhead 66.In embodiment as shown in the figure, pen 62 has one to insert handle or hold surface 126, and it is usually located between antetheca 128 and the upper wall 130, and is very convenient.Handle 126 is for pen 62 being packed into balladeur train 50 and from wherein take out being of great use.Diapire 132 combines with antetheca 128, has the nose 134 of a containing printhead 66.Rear wall 136 extends downwards from upper wall 130, to form a part of nose 134.

One traditional FPC 138 is similar to above-mentioned FPC 100, and it can have many circuit interconnects contact pin (omitting) for the purpose of clear, and it is supported by rear wall 136, to connect with printhead 66 forming circuits.Handle 126, peripheral wall 128,130,132,134 and 136, and the printhead assembly wall 138 that holds printhead 66 preferably all is molded as an independent global facility 120, it is remarkable especially to do advantage like this, because can also be determined the location benchmark of one group of pen by a this independent circumferential component 120.

In embodiment as shown in the figure, neighboring parts 120 are determined a plurality of X, Y, Z reference axis positioning element or benchmark.Locate with respect to X-axis for making pen 62, circumferential component 120 is preferably made the locating shoulder or the benchmark of three X-directions when molded, be respectively: one is positioned at the benchmark 140 of the X1 the nose 134 near, one along the benchmark 142 of diapire 95 near the X2 of antetheca 92, and one is positioned at the benchmark 144 that the X3 at angle is gone up in the back.For determining pen 62 orientations with respect to the Z axle, circumferential component 120 is determined the Z benchmark 145 along diapire 132.Be to determine that pen 62 adopts two benchmark with respect to the orientations of Y-axis, is respectively: at first, one extends laterally and the benchmark 146 of the Y1 that extend downwards from diapire 132 and secondly from the oblique angle of diapire 132 one, the benchmark 148 of a Y2 who stretches out from rear wall 98.In embodiment as shown in the figure, though the position of X benchmark 140,142 and 144 all is provided with along same sidewall 122, clearly, under some practical situations, neighboring parts 120 also can be located adjacent to benchmark outer wall 124 parts.For example, pen 62 as shown in the figure comprises three calibration references at scanning (X) direction of principal axis, is respectively: the benchmark 150 of-X1 ,-benchmark 152 of X2 and _ benchmark 154 of X3, all at the benchmark 140,142 of its corresponding X1, X2 and X3 and 144 the back side.

One locking shoulder 155 usefulness adhesive bond, ultrasonic bonding or link to each other with neighboring parts 120 with the known compatibility method of other those skilled in the art of the present technique with oblique cam surface profile.As below will further introducing, this locking shoulder 155 is very useful aspect being contained in pen 62 in the balladeur train 50 securely.In embodiment as shown in the figure, tiltedly cam surface 155 when Y-axis deviates from circumferential component 120 horizontal expansions in the other direction, is that upwards (Z-direction) tilts with it.Tiltedly cam surface 155 when its along the opposite direction of X-axis during to sidewall 124 horizontal expansions, also (the Z axle is reverse) inclination downwards.Locking shoulder 155 is positioned at along near the (see figure 2) of the end face 130 formed fillet shoulder faces 156 of circumferential component 120.As below will further introducing, fillet shoulder 156 covers on the pen 62 particularly useful downwards for guiding closed block 72.The cam structure 155 of locking shoulder is positioned under the upper wall 130, and is provided with along the back upward angle or the shoulder 158 of circumferential component 120.As below will further specifying, circular bead surface 158 is for packing in balladeur train 50 or particularly useful from wherein taking out pen 62.

Pen 62 as shown in the figure has Y and the Z benchmark that roughly is positioned in the middle of the handwriting 125, and the X benchmark of symmetry that is positioned at each side of pen, and clearly, under other practical situations, pen 62 can be according to the calibration wall on sidewall 124 next doors and orientation.In order to support this symmetric design, locking shoulder 155 also is formed with second inclined-plane of a symmetry, and itself and cam face 155 link, and this is noticeable.Clearly, under other applicable cases, pen 60 also can symmetric design.

Shown in Fig. 5-8, balladeur train 50 comprises one group of X, Y and Z benchmark or locating shoulder for the usefulness of black pen and pastel 60 and 62.At first consider the calibration on the X-direction,

pen

60,62 is biased parts and pushes main wall to.Specifically, pen 60 is setovered to main wall 76 by a spring-loaded bent member 170, and pastel 62 is setovered to main wall 76 by a spring-loaded bent member 172.Each

bent member

170 and 172 preferably all has a hook portion, and it can be fixed on the

sidewall

174 and 176 upper surface of corresponding balladeur train housing 75.As shown in Figure 7,

member

170 and 172 is outwards setovered from

wall

174 and 176 separately by a spiral disc spring 178.

Spring part

170 and 172

forces corresponding pen

60,80 towards the X-axis location benchmark that is positioned on the main wall 76.

For black pen 60, the benchmark 104 of X1 is forced to be pressed on the benchmark 180 of an X1, and the benchmark 106 of X2 is forced to lean against on the balladeur train benchmark 182 of X2.Shown X1 and the benchmark of X2 180 and 182 are shoulder forms that nicking goes out, and go out with main wall 76 is Unitarily molded.To separate in order providing at the top near black pen 60 between required pen, a slit around alignment pin 184 to be arranged on the main wall 76, it plays the effect of X3 balladeur train benchmark, to contact with a black X3 benchmark 108.Clearly, the benchmark 184 of X3 also can be a nicking shoulder that is molded into, just shown in the benchmark 180 and 182 of X1 and X2 like that, but for the ease of making, X3 alignment pin 184 is more desirable.

Really, the benchmark of X1 is a separation pin preferably, the reference pins 180 of as directed X1 ' (only shown in Fig. 5 and Fig. 6), and it is nearest apart from printhead in all X benchmark.The reference pins 180 of X1 ' and the reference pins 184 of X3 steel preferably, to make with the dimensional tolerance of precision, scale error is 0.0025 millimeter (± 0.0001 inch) scope.Although can prove that other material also is suitable in some practical application,, realize that this tolerance is easy and economical for steel.In embodiment as shown in the figure, the reference pins 180 of X1 ' and the reference pins 184 of X3 insert the rear wall 185 of balladeur train housing 75 in molded mode, to extend in the main wall 76 determined grooves, for simplicity, in the detailed description of back, only mention the molded benchmark 180 of X1, although apparent in any given practical application, the reference pins 180 of X1 ' all can be used to the substitute shoulder 180 of X1.

For pastel 62, along the inside in pastel chamber 82, main wall 76 has the benchmark 186 of an X1 and the benchmark 188 of an X2, and they are Unitarily molded with main wall 76 as shown in the figure.Identical with the black balladeur train benchmark 180 of above-mentioned X1, the pastel balladeur train benchmark of this X1 preferably also is a steel pin 180 ' (only shown in Fig. 5 and Fig. 6), although the apparent equal reference pins 180 of available X1 ' substitute of the shoulder 186 of X1 in any given practical application, but, only mention the molded benchmark 186 of X1 for the convenience of following explanation.The benchmark 140 of pastel X1 engages with the balladeur train benchmark 186 of X1, and the benchmark 142 of X2 engages with the colored balladeur train benchmark 188 of X2.Extend into the part of the steel pin 184 of the X3 in the pastel chamber 82, play the effect of calibration reference of the X3 of pastel 62.The pastel benchmark 144 of X3 engages with the calibration benchmark 184 of X3.By this way, all X1, X2 and X3 benchmark in each

chamber

80,82 are all made in the molding process of making balladeur train body 75 equally, the repeatability when producing continuously with assurance balladeur train housing.

Study the calibration situation of remaining Y and Z direction now, carriage system 50 comprises Y-Z with reference to bar 190, and it is preferably Unitarily molded within respectively by balladeur train wall 174,176 determined pods 191,192.Bar 190 has a longitudinal axis 193, and it is roughly parallel to the hole axle 194 that passes carriage bearing 54.As shown in Figure 8, be seated on the Y-Z reference axis 190 with 90 ° of angles along the benchmark 112 of the downside Y that deceives pen 60 and the benchmark 110 of Z.Equally, because it passes from the inside in balladeur train chamber 82, so the benchmark 145 of the benchmark 146 of the Y1 on the pastel 62 and Z also engages with Y-Z bar 190.The balladeur train benchmark of one the 2nd Y2 is provided by balladeur train rear wall 185, for black 60 reference region 196 that is positioned at Y2, pastel 62 then is positioned at the reference region 198 of Y2.For black pen 60, the reference region 196 of Y2 intersects with the benchmark 114 of Y2; And for pastel 62, reference region 198 intersects with the benchmark 114 of Y2; For pastel 62, reference region 198 intersects with Y2 benchmark 148.Equally, the back wall surface 198 in the chamber 82 provides the datum level of Y2 for pastel 62, and it is calibrated with the pastel benchmark 148 of Y2.

For bias force being provided for X, Y and Z all directions, and

pen

60,62 is fixed in the balladeur train, blocking mechanism comprises

clamping bar

70,72, and they are main bodys of blocking mechanism.This blocking mechanism is in the attachment under the bias state in addition, for example is positioned at the spring-loaded cam face 200,202 of bar downside.Cam face 202 on the black penholder 70 engages with cam ramp 115 on the pen 60, and the cam face 202 on the colored penholder 72 engages with 62 oblique cam surface 155.Cam face 200,202 is preferably Unitarily molded, and is outstanding on the fastener such such as spring-loaded part 203,204 respectively.Bias component (for example the spiral disc spring 205) makes latch plate 203,204 depart from

bar

70,72 respectively.Each all can constitute a spring pod 206

bar

70,72 as shown in the figure, wherein hold spring 205, and the outside of spring pod extends on the upper surface of each bar 70,72.Latch plate 203,204 preferably is installed within separately the

bar

70,72, and they can move towards bar during pressurized in the process of pole shutoff with convenient spring 205.

As wanting close-lock mechanism,

bar

70,72 will rotate by the hinge 74 on pen when

pen

60,62 is packed

chamber

80,82 into.In close-lock mechanism, controllable force is applied on separately the locking shoulder 115,155 with selected direction by cam 200,202, and it pushes each and 60,62 contacts with X, Y and the Z benchmark of balladeur train.The relative inclined-plane that the locking shoulder 115,155 of latching cam surface 200,202 and pen constitutes

forces pen

60,62 towards the X benchmark on the main wall 76, the X benchmark on the rear wall 185 and the Y-Z benchmark of being set up by reference bar 190.

Bar

70,72, latch plate 203,204, and spring 205 preferably can be designed to can play a part to be central clamping mechanism with respect to the position of hinge 74 relation.Like this, when

pole shutoff

70,72 makes it cover on

pen

60,62, moving process last several centimetres the compression springs 205 can really begin the elongation.This central role of crossing helps to be clamped in pen in the balladeur train 50 and handle is maintained in its closed position.

Each

bar

70,72 can comprise a useful guide cam of getting, and for example is respectively cam 207,208, and they are preferably along the outer rim of each bar.When taking out

pen

60,62 from carriage system 50, the shoulder portion 118,158 of guide cam 207,208 pushing pens makes it leave latch plate 203,204 respectively.When needs take out, help to prevent that to cam 207,208 effects that provided pen is stuck in balladeur train 50 by rod guidance.

Consult Fig. 7 and Fig. 8, provide additional calibration adjustments means by one θ-Z angle calibration or registration mechanism 210.Move with respect to the sidewall 174,176 of balladeur train body the bottom that θ-Z adjusting device 210 makes main wall 76.The sidewall 176 in pastel chamber is left in the spring biasing that main wall 76 is subjected to bias component (for example helical spring 212).Main wall 76 has a rotation align unit, in embodiment as shown in the figure, it is to constitute like this, the end of main wall 76 bottoms and spring 212 opposite opposite sides are made at an angle a calibration footing 214, footing 214 has a riser, and it is to extend (see figure 5) to certain angle that the X-axis towards the back side of balladeur train 50 moves in the other direction again towards the X-axis forward.The face at an angle of footing 214 can engage with the adjusting parts with a plurality of points on its total length, regulating parts can be helical member, for example screw 215, and alignment screw 215 threaded projection section 216 determined screws from the lower surface that is arranged in balladeur train body 75 pass and are screw-threaded engagement.

Anglec of rotation alignment screw 215 makes it further to engage the X2 benchmark 182,188 that can promote black and pastel towards pastel chamber 82 directions with footing 214.Rotation alignment screw 215 makes it to withdraw from the benchmark 182,188 that makes main wall 76 and X2 from boss 216 and moves to a black chamber 80 under the effect of the bias force that spring 212 is provided.In typical case, finish when this θ-Z angle is adjusted at initial assembling, or undertaken by the after-sale service or the maintenance department of locality.

Reasonable situation is, θ-Z regulating system 210 can be started by a probe (not shown), and this probe stationary is passed from hole 218 in the sidewall 174 of balladeur train body.This probe intersects with the benchmark 182 of deceiving an X2 subsequently, to measure the X-axis skew of main wall 76 with respect to the benchmark 180 of a black X1.Then can rotating screw 215, required up to finishing, adjust as the measured θ of probe-Z.Although only adjust an align unit, the adjusting of the θ in each chamber 80,82-Z angle calibration is carried out simultaneously.Like this, the Y-axis of all advancing with respect to paper in the location of the nozzle rows of black and

color print head

64,66 and calibrating, this has just eliminated the sawtooth error that occurs on the print image.

Balladeur train body 75 also comprises a nose targeting part 220, and the parts 220 of the roughly T shape that it can be stretched out by autonomous wall 76 downsides constitute.This T shape guide 220 helps to make

pen

60,62 towards balladeur train rear wall 185 location.In the installation process of pen, guide 220 pushes a nose 96,134 backward, so the benchmark 112,146 of Y1 will drop on the back of Y-Z with reference to bar 190, rather than drops on the end face of bar.

Balladeur train rear wall 185 a series of spring-loaded interconnected pins (for clarity sake omitting in the drawings) are preferably arranged on the surface of sinciput, be used for sending firing order to the conductor piece of the flexible circuit board 100,138 of pen.For black and

pastel

60,62, the interconnected pin of balladeur train can lay respectively in the zone of

arrow

222 and 224 indications.The type of arrangement that interconnected pin is suitable for is shown in the U.S. Patent No. 4,706,097 and 5,295,839 that transfers this assignee-Hewlett-Packard.

The installation site that can provide convenience for multiple different parts towards the surface of back of balladeur train rear wall 185.For example, provide the flexible circuit conductor 68 of firing order can be connected on the electronics decoding deck on the rear surface that is installed in rear wall 185 to pen.Cross print zone 25 and all-in-service station zone 52 in order to promote balladeur train 50, balladeur train driving-belt 58 can be connected to the back of wall 185 with traditional approach.In order to improve the dynamic stability of balladeur train 50, should as close as possible carriage bearing 54 when driving-belt 58 preferably is connected to balladeur train rear wall 185.

For the feedback information with sledge position offers printer controller 45, an encoding strip 225 (see figure 1)s are arranged in the total length of print zone 25, and cross all-in-service station zone 52.One traditional optical encoding reading device (not shown) can be installed on the rear surface of balladeur train rear wall 185, be used to read the positional information that encoding strip 225 is provided.For accurate positional information is provided, the position of this optical encoding reading device preferably is positioned as close to the nozzle plate of printhead 64,66.Driving-belt 58 is connected to mode on the balladeur train, and the mode of position feedback information is provided by the encoding strip reading device is that available multiple different form realizes for those skilled in the art.

In operation, printer cap 230 is opened (see figure 1), utilizes handle 90 and 126 that pen 60,62 is inserted in the balladeur train 50.The benchmark 182,184 of balladeur train X2 and X3 and 188 incline structure make the insertion of pen in a chamber easily convenient.Then clamping bar 70,72 is rotated down, so that pen 60,62 is clamped in the balladeur train 50.The installation that the pen that provided by balladeur train 50 intuitively just can be provided is very simple, because blocking device 70,72 and the cam face 200,202 handled by the user help pen 60,62 is imported and derive balladeur train 50.Then under the instruction of printer control device 45, by the running of motor 56, relend and help driving-belt 58, balladeur train 50 can move by side to opposite side from one along guide rod 48.Pen 60,62 is accepted firing order by flexible circuit lead 68 from printer control device 45.During being failure to actuate, balladeur train makes pen 60,62 turn back to all-in-service station zone 52, and maintain, keep in repair, and at printer calotte (sealing) on the duration of work cover not.By lifting clamping bar 70,72 and pen being mentioned from balladeur train, can from balladeur train 50, take out pen 60,62 at an easy rate with handle 90,126.Bar guide 207,208 pushes away bar with pen, blocks when taking out avoiding.When printer cover was opened, control device 45 preferably moved on to balladeur train certain position of print zone 25, and for example part is as shown in Figure 1 changed easily at this place's pen.

" calibration ", " alignment at this used term ", " benchmark " and " reference " all is a synonym basically.But,, generally use one of them speech for single balladeur train parts for clearer.For example, Y-Z also can be called " calibrating stem ", " baseline rod " or " alignment rod " with reference to bar 190.Moreover, though shown chamber the 80, the 82nd, sealing, apparent, the some parts of housing (for example sidewall 174,176) can omit, and the biasing member of other type can be used to force

pen

60,62 to engage with main wall 76.Have, balladeur train 50 is as shown in the figure controlled a pair of pen again, and clearly, such arrangement form can expand two pairs of pens at an easy rate to, i.e. four systems.Four systems like this can adopt two balladeur trains 50 to constitute, and for example, make a balladeur train 50 that is mirror image substantially, and make sidewall 176 or be associated in together, or are a wooden partition that is one better.

In order to provide high-quality image as the hard copy of printer 20 output on paper 35, it must accurately and can reproduce

printhead

64,66 each other and with respect to the location of whole print system.In other words, when operating personnel changed empty, the calibration of the new pen that is full of must be identical with

empty pen.Pen

60,62 location is one of basic underlying variables of aliging on print media of control ink droplets.Balladeur train 50 is by making position that policy selection determine pen with respect to balladeur train and balladeur train with respect to the benchmark of the position of printer to definite pen.

Pen

60,62 X-axis location is that the direction with pen is defined as making the X benchmark opposed mutually and carry out.In balladeur train 50 as shown in the figure, the benchmark 104,106,108 of a black X is towards the benchmark 140,142,144 of pastel X, and the alignment pin 184 of main wall 76 and X3 is clipped in wherein.By main wall 76 is clipped between the pen, the design more early stage to the control of the thickness of main wall 76 is more easy, for example DeskJet ^1200, central all benchmark all are positioned at a side of pen and are subjected to the influence of the tolerance variation of a thickness.Can think that the benchmark 104,140 (pen) of X1 and 182,188 (balladeur trains) are the most influential influencing aspect the drop position, because these benchmark are nearest from the nozzle of

printhead

64,66.

The Y-axis location of

pen

60,62 preferably realizes that by Y-Z is inserted in the balladeur train body 75 in molded mode with reference to bar 190 it is roughly parallel to the center line 194 of the bearing 54 that embeds in molded mode.By this way, provide the accurate calibration of pen with respect to Y and Z benchmark, it is relevant with balladeur train guide rod 48 determined balladeur train scan axises.Balladeur train has two characteristics to help the Y1 of pen and the accurate calibration of Z benchmark.The first, in embodiment as shown in the figure, V-shaped groove bearing 54 embeds housing 75 in molded mode, belongs to the zero clearance bearing, does not also have the pressure rigging error.The embedded molded mode of bearing 54 has been eliminated the common factor that causes Y position and θ-Z error, and is recurrent when adopting the cylinder-shaped sleeve of pressure assembling in their printing mechanisms in early days.

Second characteristic that helps Y1 and Z benchmark accurately to calibrate are relevant along the calibration notion of straight reference lever 190 with the benchmark 112,146 of Y1.The length of bar 190 preferably approximately is the twice of benchmark 112,146 spacings of black pen and pastel Y1.In addition, Y-Z bar 190 is also very accurate by pod 191,192 supports that provided of balladeur train body at two ends.Advantageously, because the distance of fulcrum 191,192 is twices of a benchmark 112,146 spacings of Y1,, the site error of Y direction may result from half of site error of the end of bar 190 so approximately being any other.

The θ of pen 60,62-Z location is controlled preferably by adjusting a single registration mechanism 210.Adjust by carrying out θ-Z, make the calibration optimization of a black nozzle of printhead 64 in a side of deceiving a chamber of main wall 76.The optimization of a black nozzle is preferred in embodiment as shown in the figure, because color nozzle with respect to each group printhead 66, its row eminence is in the scope of 0.53cm (0.21 inch), and the row height of black pen 60 nozzles or title row are high higher, in 1.27cm (0.5 inch) scope.Obviously, any thickness error of the colour reference 188 of X2 all can be added on any θ-Z site error of pastel 60.But, owing to used cylindrical parts 182,188, the thickness error of the benchmark 182,188 of X2 to reduce to minimum.In addition, use cylindrical parts 182,188 to help to reduce the site error of reversing the pastel 62 that is caused of regulating the datum line beam that makes X2 owing to θ-Z.

The advantageous particularly part of carriage system 50 is that accurate X-axis location is provided itself, by adopting the thin main wall 76 and the pin 184 of high tolerance.The targeting scheme of X-axis and Y-axis all can also need not to carry out expensive secondary machine operations near the machined tolerance.Adopt economical moulded-on type calibration footing 214 and adjustment screw 215, θ-Z alignment scheme 210 can accurately make pen adjust to machining tolerance simultaneously.

The

clamping system

70,72 of lever operation is compared with early stage system, provides the control degree higher application to the power that acts on the pen.At this, operating personnel's

control stick

70,72 is fixed on print position with pen, rather than directly contacts with pen.Adopt this mode, can also avoid the potential cross force that may cause the damage pen, in early stage printer Design, often run in clamping process.Another advantage of balladeur train 50 has been that the bent member 170,172 of X bias has used biasing spiral disc spring 178.The early stage flexural spring of the control ratio to bias force that spiral disc spring 178 provides designs more accurate, when the latter's bent thickness work in-process has little variation, can stand the variation of bigger power.Like this, 20 pairs of bias forces of the X biasing mechanism of balladeur train 50 provide more accurate control.

Claims

One kind with reference to XYZ coordinate system, make the carriage system of removable first and second ink-jet pen along the print zone scanning of inkjet printing mechanism, it comprises:

A balladeur train body, it determines first and second sidewalls that hold first and second ink-jet pen betwixt, be close to the first side wall and second ink-jet pen with first ink-jet pen within being installed in the balladeur train body time and be close to the first side wall within being installed in the balladeur train body time;

A Y-Z is with reference to bar, and it extends between first and second sidewalls, and its position contacts with first and second ink-jet pen and makes it at two Y within first and second writing brushes are installed in the balladeur train body time, calibrates on the orthogonal direction of Z.
2. carriage system as claimed in claim 1 is characterized in that,

The first side wall determines to hold the part in first chamber of first ink-jet pen;

Second sidewall determines to hold the part in second chamber of second ink-jet pen;

The balladeur train body also determines to separate the Yi Zhubi in the one the second chambeies, determines towards the X benchmark in first chamber with towards the 2nd X benchmark in second chamber with this main wall; With

When first and second ink-jet pen separately are installed in separately within first and second chambeies, with each described two Y, on orthogonal the 3rd directions X of the orthogonal direction of Z, first and second benchmark and first and second ink-jet pen calibration separately.
3. as the carriage system of claim 1 or 2, it is characterized in that it is used for scanning first and second ink-jet pen along the scan axis that crosses the print zone of an inkjet printing mechanism, this inkjet printing mechanism has the balladeur train guide rod that is parallel to scan axis, wherein:

The balladeur train body is to be molded by plastic;

Y-Z is to be inserted in first and second sidewalls by molded mode with reference to bar, when its position is installed in the inkjet printing mechanism when carriage system, is in substantially parallel relationship to scan axis and balladeur train guide rod.
One kind with reference to XYZ coordinate system, make the carriage system of removable first and second ink-jet pen along the print zone scanning of inkjet printing mechanism, it comprises:

A balladeur train body, it is determined and holds first and second sidewalls of first and second ink-jet pen separately, comprise movably bottom of first and second sidewalls that second sidewall of the part in the first side wall of a part of separating the main wall in first and second chambeies, first chamber of determining main relatively wall and second chamber of determining relative main wall, main wall have a relative main body with the balladeur train body; With

θ by a body supports-Z adjustment part, with optionally with the lower bond of main wall, be used for moving, come when first and second ink-jet pen are installed in separately in first and second chambeies, adjust θ-Z angle calibration of first and second ink-jet pen simultaneously relative to first and second sidewalls of main body.
5. carriage system as claimed in claim 4 is characterized in that,

The bottom of main wall has the edged surface that main relatively wall becomes the angle; With

θ-Z adjustment part engages with edged surface, to leave first chamber and towards second chamber in the bottom that pushes main wall.
6. carriage system as claimed in claim 5 is characterized in that,

Edged surface leaves main wall at one and extends in the directions X in first chamber;

Carriage system also comprises a biasing member, and it is arranged between the bottom of the part of balladeur train main body and main wall, with the bottom of the main wall of setovering towards first chamber;

When θ-Z adjustment part moved in first chamber, the bottom of main wall was urged towards second chamber; With

When adjustment part when shift out in first chamber, biasing member pushes main wall towards first chamber.
7. as the carriage system of one of claim 4-6, it is characterized in that,

Main wall is determined towards an X benchmark in first chamber with towards second benchmark in second chamber;

Carriage system also comprises a biasing mechanism, and it is supported by body, when being installed in first chamber when first ink-jet pen, pushes it to contact with an X benchmark and when second ink-jet pen is installed in second chamber, pushes it and extremely contact with the 2nd X benchmark.
8. as the carriage system of one of claim 4-6, it is characterized in that, comprise that also a Y-Z is with reference to bar, it extends between first and second sidewalls and passes first and second chambeies, with in being installed in separately first and second chambeies time, Y-Z is with reference to bar for the contact of first and second ink-jet pen, makes first and second ink-jet pen at two Y, calibrates on the orthogonal direction of Z.
One kind with reference to XYZ coordinate system, make the carriage system of removable first and second ink-jet pen along the print zone scanning of inkjet printing mechanism, it comprises:

A balladeur train body, it is determined and holds first and second sidewalls of first and second ink-jet pen separately, comprise a main wall of separating first and second chambeies with the balladeur train body, main wall is determined an X benchmark and the 2nd X benchmark towards second chamber towards first chamber, wherein main body comprises the first side wall of the part in first chamber of determining main relatively wall, second sidewall with the part in second chamber of determining relative main wall, first and second sidewalls that main wall has a relative main body are the bottom movably, and the bottom of main wall has the position first and second X benchmark thereon;

One by the biasing mechanism that body supported, and when first ink-jet pen is installed in first chamber, pushes it to contact with an X benchmark and when second ink-jet pen is installed in second chamber, pushes it and extremely contact with the 2nd X benchmark; With

Adjustment part by body supports, with optionally with the lower bond of main wall, the first and second X benchmark are moved relative to first and second sidewalls of main body, when being installed in separately in first and second chambeies when first and second ink-jet pen, adjust θ-Z angle calibration of first and second ink-jet pen simultaneously.
10. carriage system as claimed in claim 9 is characterized in that biasing mechanism also comprises:

One by first biasing member that body supported, and when being installed in first chamber when first ink-jet pen, pushes it to contacting with an X benchmark; With

One by second biasing member that body supported, and when being installed in second chamber when second ink-jet pen, pushes it to contacting with the 2nd X benchmark.