CN2734483Y - Printer - Google Patents
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- CN2734483Y CN2734483Y CN 200420051106 CN200420051106U CN2734483Y CN 2734483 Y CN2734483 Y CN 2734483Y CN 200420051106 CN200420051106 CN 200420051106 CN 200420051106 U CN200420051106 U CN 200420051106U CN 2734483 Y CN2734483 Y CN 2734483Y
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- framework
- gear
- printhead
- roll
- paper
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Abstract
The utility model discloses a printer. The press plate and the printing head relatively match to ascertain the printing position of the printing head when the open-closed second frame arranged on the first frame is closed. The first tooth gear is installed on the first frame, and the second tooth gear is installed on the second frame. When the second frame is closed, the second frame and the first tooth gear take on the gear engagement status. The position relation between the first tooth gear and the second tooth gear is given so that in the status of engagement of the first tooth gear and the second tooth gear, the first component force is generated along the direction of closing the second frame, and the second component force is generated towards the press plate from one side of the printing head, after the point of engagement passes the force acted on the second frame from the first frame.
Description
Technical field
The utility model relates to and has fixed frame and can be installed in rotating frame on the fixed frame with opening and closing, closes the printer that rotating frame just can form the driving force bang path of paper advance mechanism etc.
Background technology
Printer, the printer that for example on paper roll, prints, from the paper roll of paper roll accommodation section filling, record-paper is extracted out and carried, carry out desired printing at this record-paper via print position.This printer is known following formation, promptly, simple to operate for the replacing that makes paper roll, the rotating frame of printer can be installed on the fixed frame with opening and closing, open rotating frame, then the paper roll accommodation section is full-gear, and the record-paper transport path also becomes open state.This configuration example for example is disclosed in Japan's patent application and discloses in the flat 9-314955 of communique number and flat 6-55806 number.
This printer, sometimes adopt: will be equipped on the fixed frame side as the paper pushing motor of the drive source of paper advance mechanism, the feeding-in roll that is driven by paper pushing motor is equipped on the rotating frame side, closes rotating frame, then forms from the formation of paper pushing motor to the path of feeding-in roll transmission of drive force.In the case, close rotating frame, then the slave end gear of rotating frame side just with the driving side gears engaged of the driving force transmission usefulness of fixed frame side, and can transmission of drive force.By the driving side gear under the state of slave end gear transmission driving force, can produce the power that works from fixed frame lateral rotation frame side in this position of engagement.
If the action direction of this power is inappropriate, by this power power that produce, that rotating frame is moved to paper feeding direction, might produce literal in the same delegation that makes paper feeding pitch and printing and can not the above-below direction alignment etc. print the bad problem in location, print quality is descended.
And in the printer of this formation, under the situation of using some impact type printhead, printhead is equipped on the fixed frame side sometimes, is equipped with the pressing plate that stands facing each other by certain interval and printhead in the rotating frame side.In the case, from printhead on the pressing plate of rotating frame side, with the directive effect impulsive force of paper feeding direction orthogonal.In the case, if the action direction of the power that produces in two gear meshing positions is inappropriate, also might be owing to the power that produces, rotating frame is moved to the direction with the paper feeding direction orthogonal by this power, and cause the platen gap instability, print quality descends.
The utility model content
The utility model provides a kind of printer, close rotating frame, then and fixed frame between form the driving force bang path, can prevent under the state of transmission of drive force, by the instability of the paper feeding pitch that causes to the power of rotating frame effect from fixed frame and the instability of platen gap.
For achieving the above object,, provide a kind of printer, have according to the utility model:
The 1st framework,
Can be installed in the 2nd framework on described the 1st framework with opening and closing,
Printhead,
Close described the 2nd framework, the relative pressing plate that disposes, stipulates the print position of this printhead then with described printhead,
Be installed in the 1st gear on described the 1st framework,
Be installed on described the 2nd framework, close described the 2nd framework and then be the 2nd gear with described the 1st gear engagement states;
Set the position relation of the described the 1st and the 2nd gear, so that under the state that meshes between the described the 1st and the 2nd gear, in this meshing point, by from the power of described the 1st framework, produce along the 1st component of the direction of closing described the 2nd framework with from the 2nd component of the first side of described printing towards described pressing plate direction to described the 2nd framework effect.
In order to set the position relation of two gears like this, under the situation of observing with the direction of the pivot line parallel of described the 1st gear and the 2nd gear, make the direction that acts on the power on the described meshing point towards: by the 1st line segment that connects described meshing point and the on-off action central point of described the 2nd framework with by described meshing point and with get final product in the angular range that the 2nd parallel line segment of the power of described pressing plate function surrounds from described printhead.
According to this formation, under the state of transmission of drive force, on the 2nd framework, from the 1st frame side to the directive effect power of closing the 2nd framework.So, for example be equipped on described the 1st framework at described the 1st gear and described printhead, described the 2nd gear and described pressing plate are equipped under the situation on described the 2nd framework, in the time of preventing that record-paper from carrying, the 2nd framework is pushed to it and opens direction, pressing plate relatively moves on paper feeding direction with respect to printhead.Therefore, disadvantages such as instability are located in the change of paper feeding pitch and the printing that can not be created in the record-paper of print position.
The driving force bang path is generally the driving force bang path of the paper advance mechanism of feeding recordable paper.In the case, on described the 1st framework, carry paper pushing motor, on described the 2nd framework, carry feeding-in roll.And, on described the 1st framework, be equipped with and close the air roll that described the 2nd framework then contacts with described feeding-in roll.Then, close described the 2nd framework, then form the driving force bang path that the revolving force of described motor is transmitted to described feeding-in roll from described the 1st gear, via described the 2nd gear.
Should adopt following formation at this, promptly, described feeding-in roll with under the state of closing described the 2nd framework, the form that is positioned at the upside of described pressing plate is equipped on the 2nd framework, described air roll is equipped on described the 1st framework with the form of the upside that is positioned at described printhead.
In addition, wish and then have: with the paper pushing gear of described feeding-in roll one rotation and with this paper pushing gear engagement, transmit described paper pushing motor rotation the 1st transmit gear; Described the 1st transmission gear is to use the material harder than described the 2nd gear to form.Wish also to have: use that the material harder than described the 2nd gear forms, with the described the 1st transmit the 2nd of gears engaged and transmit gear, can reduce the influence of strain of the transmission tooth of gear thus.
According to above-mentioned formation, the tooth of engagement is strain when transmitting, because the recovery of this distortion, and problem such as the bad and paper feeding pitch in the printing location that is produced by the feeding-in roll rotation is bad, its distortion tails off because material hardness improves, and print quality improves.The 1st transmits gear, accepts the side transmitted and to the influence at two places such as a side that paper pushing gear transmits, so its effect is obvious owing to reduce.
The utility model is suitable for the printer of described printhead for an impact type.Under the situation of using some impact mode printhead, when printing, the impulsive force of the throughput direction orthogonal direction of effect and record-paper on pressing plate.Under the state of transmission of drive force, to the 2nd framework effect and impulsive force side's power in the opposite direction, then push pressing plate to the direction approaching with printhead by this active force from the 1st framework.Its result can cause the platen gap instability when printing.
Yet, under the state of transmission of drive force, by from the power of the 1st framework, produce component towards the action direction of impulsive force to the 2nd framework effect according to above-mentioned formation.Therefore, can realize the stabilisation of platen gap.
Description of drawings
Fig. 1 is for being suitable for the stereoscopic figure of printer of the present utility model.
Fig. 2 is the summary profilograph of the printer of Fig. 1.
Fig. 3 is in the summary profilograph of open mode for the lid of the printer of Fig. 1.
Fig. 4 is the local amplification profile of the sheet feed mechanism of printer part of presentation graphs 1.
Fig. 5 is the stereogram of print unit built-in in the printer of presentation graphs 1.
Fig. 6 is that the rotating side unit is in the stereogram of open mode in presentation graphs 5 print units.
Fig. 7 is for the component parts of driving force transmission mechanism being the summary side elevation of the print unit represented of center.
Fig. 8 is under the state of opening entirely for expression rotating side unit, is the summary side elevation of the print unit represented of center with the component parts of driving force transmission mechanism.
Fig. 9 for explanation under the state of transmission of drive force, from the key diagram of the action direction of the power of fixed frame lateral rotation frame side effect.
The specific embodiment
With reference to the accompanying drawings, the embodiment that has been suitable for printer of the present utility model is described.
Illustrate with reference to Fig. 1～Fig. 4.Printer 1 has: cover the outer cover body 2 of the rectangular frame shape of side around it, above the override printer front part front side cap 3 and cover the rear side cover 4 of rear section, constitute printer casing by these parts.Be built-in with print unit 11 in printer casing, the position between lid 3,4 forms record-paper outlet 5.The lid 4 of rear side is supported on the rotating rotating frame (the 2nd framework), handles sliding button 6, and then its locking mechanism (not shown) will be untied, and just can open as shown in Figure 3.Cover 4 one and open, will expose the accommodation section 8 of the paper roll 7 in the print unit 11, just can carry out the replacing of paper roll 7 etc.And the lid 3 of front side is opened, and then exposes the ribbon cartridge installation portion 10 of the ribbon cartridge 9 that print unit 11 releasably is installed, and can carry out the replacing of ribbon cartridge 9 etc.
The following describes the internal structure of printer.At the rear section of printer unit 11, be formed with and have when observing from the side the accommodation section 8 of the paper roll 7 of the circular-arc bottom surface of opening up.From the record-paper 7a that pulls out the paper roll 7 of this filling, the guide roller 14 of the fore-end by being installed in accommodation section 8 is directed into record-paper transport path 15.Record-paper transport path 15 has: the transport path part 16 that face forward and top tilt a little, the place ahead slant path part 17 of rising from the big upward angle of inclination of front end of this transport path part 16 and the rear slant path part 18 that is connected with record-paper outlet 5 from the upper end tilted rearward of this place ahead slant path part 17.In Fig. 2 and Fig. 4, represent record-paper 7a with chain-dotted line.
Form the installation portion 10 of ribbon cartridge 9 at the upside of head carriage 22.This installation portion 10 also is configured to towards the rear and acclivitous state.So the colour band 9a at the ribbon cartridge 9 of this installation can be provided with both between printhead 20 and pressing plate 21 abreast.
With the rear slant path part 18 that preceding side Pour wrong path part 17 is connected, be to determine along the conveying guide 28 that rearward crooked direction prolongs by upper end from pressing plate 21.In this rear slant path part 18, dispose: by feeding-in roll 25, air roll 26 and as air roll 26 being suppressed the paper advance mechanism that send the torsion bar that suppresses parts 27 on the roller 25 to form at paper.Feeding-in roll 25 is configured in the rear side of rear slant path part 18, air roll 26 in its front side, can be near being supported on movably on the roller installing plate 29 on the direction of feeding-in roll 25, by the elastic force of torsion bar 27 it is suppressed a side at feeding-in roll 25 always.
The record-paper 7a that pulls out from paper roll 7, and by utilizing paper pushing motor rotation feeding-in roll 25 described later, is carried along transport path 15 between feeding-in roll 25 and air roll 26 by cramping.In addition, in the present embodiment, pressing plate 21 and the conveying guide 16a that is connected with its downside are to be that pressing plate framework 55 forms by single part, and conveying guide 28 is installed in the upper part of this pressing plate framework 55.
Also have, near record-paper outlet 5, dispose the automatic cutting unit 30 of scissors that is used to cut off record-paper.Automatically cutting unit 30 clips the transport path of record-paper, and has: but but at the dead knife 31 of front side configuration, at the moving knife 32 of rear side configuration and the driving mechanism 33 that moving knife 32 is moved.But moving knife 32 and driving mechanism 33 are built in the shell 34.But moving knife 32 slide on dead knife 31 above, but the record-paper 7a that is between dead knife 31 and the moving knife 32 is cut off.And, the cutoff tool 35 that can be cut off record-paper by manual operation is installed in record-paper outlet 5 leading edge portion.
Reach as shown in Figure 6 as Fig. 5, print unit 11 has fixation side unit 12 and rotating side unit 13.Rotating side unit 13 is can being that the state that rotate up and down at the center is supported on the fixation side unit 12 with its rear end part.
In the print unit 11 of present embodiment, for can simplifying the replacing operation of paper roll 7, and following formation, promptly, open the lid 4 of the accommodation section 8 of paper roll 7, then the record-paper transport path 15 that constitutes is as mentioned above also just opened immediately.For this reason, the component parts of a side that constitutes transport path 15 is installed on fixation side unit 12, in mobile side is mounting cover 4 and constitute the component parts of the opposite side of transport path 15 on the rotating side unit 13, like this, open rotating side unit 13, then open the accommodation section 8 of paper roll 7, transport path 15 is also just opened immediately simultaneously.
Elaborate now.On fixation side unit 12, be installed with: the dead knife 31 of the conveyor surface 16b of paper roll accommodation section 8, transport path part 16, printhead 20, air roll 26 and automatic cutting unit 30.Relative therewith, on rotating side unit 13, be installed with: transport path part 16, determine the place ahead slant path part 17 and rear slant path part 18 pressing plate framework 55 (carry guide 16a and pressing plate 21) but and guided plate 28, feeding-in roll 25 and the moving knife 32 and the driving mechanism 33 of cutting unit 30 automatically.Cover 4 (with reference to Fig. 3) but also be installed with.
At this, though but certain fault appears in moving knife 32 at dissengaged positions, can moving knife 32 when stopping with dead knife 31 crossing condition, but because moving knife 32 is in the upper side position of dead knife 31, so rotating side unit 13 also can move.
From Fig. 3, Fig. 6 as can be known, open rotating side unit 13 fully, just can load paper roll 7 by falling into accommodation section 8 these shirtsleeve operations from the top with paper roll 7.And, because transport path 15 is in open mode, so the operation of the record-paper 7a that pulls out along transport path 15 configurations from paper roll 7 is also very simple.And, close rotating side unit 13 and make it to return to as Fig. 2, Fig. 4 and state shown in Figure 5, then can form record-paper 7a automatically can be via the state of pulling out between printhead 20 and the pressing plate 21 and between feeding-in roll 25 and the air roll 26 and from record-paper outlet 5.
Next, further describe the structure of fixation side unit 12 and rotating side unit 13.At first, fixation side unit 12 has fixed frame 40 (the 1st framework), sets up in front part, balladeur train leading axle 23 broad ways of this fixed frame 40.As mentioned above, the head carriage 22 that is equipped with printhead 20 in these balladeur train leading axle 23 upper supports, and head carriage 22 can move back and forth.Under the state that covers these head carriages 22 and printhead 20, colour band framework 41 is installed, the outer peripheral portion of this colour band framework 41 constitutes the installation portion 10 of ribbon cartridge 9.
Form the accommodation section 8 of filling paper roll 7 at the rear section of fixed frame 40.Rear end part in this accommodation section 26, the rotary middle spindle 43 that broad ways is extended is erected on the fixed frame 40.The center line of this rotary middle spindle 43 constitutes the switching center 43a of rotating side unit 13.
On the other hand, rotating side unit 13 has and covers 51, and this switching framework 51 has the left and right arms part 52,53 that direction is forwards, backwards extended, the front end connecting plate part 54 that is connected with fore-end with this arm portion 52,53.The rear end part of left and right arms part 52,53 also can be rotated freely by the two end portions support of above-mentioned rotary middle spindle 43.Front end in the front end coupling part 54 of rotating frame 51, dispose pressing plate framework 55 (pressing plate 21, conveying guide 16a) and guided plate 28, at its rear side configuration feeding-in roll 25a, peristome 28a from the guided plate 28 at this pressing plate framework 55 forms forwards is extruded with the outer peripheral face with co-axially fixed 2 the feeding-in roll body 25b of feeding-in roll 25a.On the front end coupling part 54 of rotating frame 51, but carrying the moving knife 32 and the driving mechanism 33 of cutting unit 30 automatically.
At this, from Fig. 2, Fig. 3 as can be known, on the fixation side unit 12 of present embodiment, as mentioned above, printhead 20 square neck up tiltedly disposes, and corresponding, and the ribbon cartridge 9 that installation portion 10 is installed is tilted configuration in the same direction thereupon also.Also have, in rotating side unit 13 sides, with the women's head-ornaments 20a of printhead 20 form of parallel face-off at regular intervals, the downward-sloping pressing plate 21 that disposing.In addition, the center of rotation of rotating side unit 13, promptly the height of the center line of rotary middle spindle 43 is positioned at the women's head-ornaments 20a downside of printhead 20.
Its result, motion track with this rotating side unit head portion of the switching of rotating side unit 13, promptly, with the motion track of the top and bottom of the pressing plate 21 of printhead 20 face-off, from the position (rotating side unit 13 is in the position of closed condition) that stands facing each other at regular intervals with printhead 20, with respect to the women's head-ornaments 20a of printhead 20, be not forwards or the top, but rearward away from circular arc.When rotating side unit 13 opened and closed, these motion tracks did not intersect with printhead 20.
And, because the rotary centerline (center line of rotary middle spindle 43) of rotating side unit 13 is in the position of below more than the women's head-ornaments 20a of printhead 20, so the motion track of pressing plate 21 upper and lower sides is big with the mobile rearward amount of movement that produces of rotating side unit 13.Its result directly over print position 17, can form not the space (being viewed as the space of del from the side) that the motion track with rotating side unit 13 intersects.In the present embodiment, utilize this space configuration air roll 26, torsion bar 27, the dead knife 31 of cutting unit 30 and cutoff tool 35 etc. automatically.Therefore, can make formation compactness, the miniaturization of device.
Also have, in the present embodiment, in the time of the printhead of tilted configuration 20, the installation portion 10 of ribbon cartridge 9 is tilted configuration also.Like this, ribbon cartridge 9 can be from the place ahead upside along incline direction in these installation portion 10 loading and unloading.Air roll 26, dead knife 31 and the cutoff tool 35 of cutting unit 30 automatically directly over print position 17, have been disposed.But these parts also have no relations, and can load and unload ribbon cartridge 9.So, only have the advantage that the simple operations of using " getting final product once touching " can be loaded and unloaded ribbon cartridge.
And, by adjusting the angle of inclination of printhead 20 and pressing plate 21, and a side or the both sides of the height and position of the rotary middle spindle 43 of rotating side unit 13, can change the motion track of rotating side unit 13.Thus, can increase and decrease print position 17 just above space that form, that do not intersect with the motion track of pressing plate upper and lower side, also have the advantage of the free degree that can increase component layouts.
Next, with reference to the driving force transmission mechanism of Fig. 7～Fig. 9 detailed description to feeding-in roll 25 transmission of drive force.
The drive source of the driving force transmission mechanism in the present embodiment is, is installed in the paper pushing motor 61 of plate portion of the fixed frame 40 of fixation side unit 12.25 power transfer path is by the reduction gearing 64 (the 2nd gear) of the reduction gearing (the 1st gear) 63 that is installed in pinion 62 on the motor output shaft 61a, driving side, slave end from paper pushing motor 61 to feeding-in roll, the paper pushing gear 67 that transmits gear 65 (the 2nd transmits gear), transmit gear 66 (the 1st transmits gear) and be installed in the roll shaft 25a end of feeding-in roll 25 constitutes.
At this, as shown in Figure 8, the plate portion at the fixed frame 40 of fixation side unit 12 is equipped with the paper pushing motor 61 that pinion 62 is installed, and driving side reduction gearing 63 is installed on output shaft 61a.On the plate portion 52 of the rotating frame 51 of rotating side unit 13, be equipped with slave end reduction gearing 64, transmit gear 65 and transmit gear 66.And, such as described above at the head portion of the plate portion 52 of this rotating frame 51, the roll shaft 25a of feeding-in roll 25 is installed, and at the coaxial paper pushing gear 67 of fixing of this end.
Close rotating side unit 13, then can be formed on the state that the reduction gearing 64 of the slave end of this lift-launch is meshed with the driving side reduction gearing 63 of fixation side unit 12.Thus, just formed driving force bang path from the paper pushing motor 61 of fixation side unit 12 to the feeding-in roll 25 of rotating side unit 13.And open rotating side unit 13, will disconnect the driving force bang path.
At this, in the present embodiment, the allocation position of the reduction gearing 63 of driving side and the reduction gearing 64 of slave end is determined as follows.Describe with reference to Fig. 9: the position of determining two gears 63,64, so that under driving force transmit mode from driving side reduction gearing 63 to slave end reduction gearing 64, meshing point A at two gears 63,64, by (fixed frame 40) produces along the component Fy1 of the direction of closing rotating side unit 13 and point to the component Fx2 of pressing plate 21 from printhead 20 sides to the power F of rotating side unit 13 (rotating frame 51) effect from fixation side unit 12.
Below be elaborated.Point of contact (two gear meshing point) A with the pitch circle of the large diameter gear part 64a of the reduction gearing 64 of the pitch circle of the small-diameter gear part 63b of the reduction gearing 63 of driving side and slave end is a starting point, pulls out the line segment L1 by the switching central point B (43a) of rotating side unit 13.Next, be starting point, do and the power that acts on to pressing plate 21 from printhead 20, with meshing point A promptly with the parallel line segment L2 of impulsive force F1 orthogonal direction.The direction of impulsive force F1 is the direction with the paper feeding direction orthogonal of print position.So line segment L2 is the line parallel with the paper feeding direction L3 of print position.
Next, when observing with the direction of the pivot line parallel of two gears 63,64, the direction of direction in the scope of the angle θ that surrounds by line segment L1 and line segment L2 of the power F that makes in meshing point A effect.For this reason, determine meshing point A, make the vertical line segment L4 of action direction with the power F that passes through this meshing point A, pivot C, the D of two gears 63,64 is positioned on the line segment L4, dispose two gears 63,64 and get final product.
Owing to dispose two gears 63,64 like this, so, close the directive effect power of this rotating side unit 13 from fixation side unit 12 side direction under the state of transmission of drive force, on rotating side unit 13.That is, power F has the component Fy1 with the direction of line segment L1 orthogonal.This component Fy1 gets around rotating side unit 13 to close the power that central point B rotates to closing direction.
At this, by make the locating slot 72 that forms on the rotating side unit 13, the bottom broadens from side contacts embed the alignment pin 71 that is installed in the circular section on the fixation side unit 12, the location of finishing this rotating side unit 13.Therefore, when pushing rotating side unit 13 to closing direction, the inner peripheral surface of locating slot 72 cooperates the outer peripheral face that embeds alignment pin 71, the location of finishing rotating side unit 13 from upside.Yet when rotating side unit 13 was pushed to open direction, it was very difficult stoping rotating side unit 13 to be moved upward (to opening moving of direction) fully.
In the present embodiment, such as mentioned above, under the state of transmission of drive force, rotating side unit 13 is because the effect of power F is pushed to closing direction.Like this, the position of the switching direction of rotating side unit 13 is positively fixed.Therefore, can prevent since rotating side unit 13 to open and close direction minute movement and then pressing plate with respect to printhead to the paper feeding direction minute movement, cause paper feeding pitch instability, print location (Alignment) instability, the drawback that causes print quality to descend.
On the other hand, at the meshing point A of two gears 63,64, acting on power F on the rotating side unit 13 has the unidirectional component Fx2 of action direction with the impulsive force F1 of printhead 20.So,, by the effect of power F, press this pressing plate 21 to the direction of leaving printhead 20 in rotating side unit 13 always.
When printing, to pressing plate 21, the impulsive force F1 of the direction of the throughput direction orthogonal of effect and record-paper utilizes impulsive force F1 to press pressing plate 21 from printhead 20.Under the state of transmission of drive force, to 13 effects and the reverse power of impulsive force F1 of rotating side unit, then the direction of proximity printing head 20 is pushed pressing plate 21 in the effect of this power from fixation side unit 12.
As described above, be to determine the closed position of rotating side unit 13, make locating slot 72 that form, that lower shape broadens on the rotating side unit 13 from above contact with the alignment pin of fixation side unit 12.Because locating slot 72 lower shapes broaden, unsettled situation takes place easily in the location of rotating side unit 13 fore-and-aft directions.
Because the effect of the power F that works under the state of transmission of drive force, rotating side unit 13 is pushed to the front side, makes the contact condition of alignment pin and locating slot 72 become unstable at fore-and-aft direction.Its result may produce owing to the platen gap instability, cause print quality to descend.
Yet, in the present embodiment, rotating side unit 13 is pushed to the action direction of the impulsive force F1 of printhead 20 by power F.Thus, the anterior end surface of locating slot 72 cooperates embedding from the front side with the outer peripheral face of alignment pin 72, thereby has finished the location of fore-and-aft direction.Therefore, because platen gap keeps certain, so can prevent the decline of print quality.
In addition, as subsidiary effect since positively carry out as described above opening/closing unit 13 about, the location of front and back, so can also eliminate the instability action of rotating side unit 13, prevent the generation of ear-piercing noise.
And, from as the paper pushing motor 61 of drive source gear,, make by polyacetals (POM) material except that transmitting gear 65 and transmitting the gear 66 to feeding-in roll 25 transmission of drive force.Transmitting gear 65 and transmitting gear 66 is to make with the insulated plastic composite that is combined with the material potassium titanate crystal whisker harder than POM (trade (brand) name TISMO ， Da mound (Ohtsuka Kagaku) chemistry system) (trade name POTICON ， Da mound chemistry system).
In said structure, when transmitting record-paper 7a, the tooth of each gear is applied power, the tooth of engagement transmits record-paper 7a under deflected.Still be in deflected even stop the tooth of paper feeding, engagement, yet, when 20 couples of record-paper 7a of printhead print, because this impulsive force F1 can make pressing plate 21 that microvibration takes place.This microvibration also can be passed to meshed gears, discharges the deflected of the tooth of engagement.Its result because record-paper 7a that should be static is to the printer paper feeding of printing, and make take place that the literal above-below direction does not line up in the delegation of printing and wait to print locate bad.
Yet, in the present embodiment, since improved with the paper pushing gear 67 of the roller 25a of feeding-in roll 25 directly engagement transmission gears 66 and with the rigidity of the transmission gear 65 that transmits gear 66 engagements, so reduced the deformation extent of tooth, the deflection that is discharged by impulsive force F1 is reduced.Therefore, can keep the printing location well.Especially owing to improve as the 1st rigidity of tooth of transmitting the transmission gear 66 of gear, reduced with as the 2nd influence of transmitting this two place of a side of the side of transmission gear 65 engagements of gear and paper pushing gear 67 engagements, make this effect more remarkable.And the rigidity of gear 65 will improve, effect can be better if also will transmit.
In the present embodiment, though the driving force bang path of feeding-in roll, form by closing the rotating side unit, but for being formed for driving the printer of the driving force bang path of the part outside the paper feeding structure by closing the rotating side unit, the utility model is suitable for too.
In the present embodiment, at the gear of configuration driven source, fixation side unit and driving side, at the gear of rotating side unit configuration slave end, but, even under the situation opposite with this configuration relation, the utility model is suitable for too.
Present embodiment relates to and has a printer of impact type printhead, even but for the printer that uses ink jetting printing head as printhead, the utility model is suitable for too.In addition, for the printer of the contact-type printhead that uses the temperature-sensitive hair style as printhead, the utility model is suitable for too.
In the present embodiment, constitute the feeding-in roll of conveying mechanism and the upside that air roll is disposed at printhead, still, even be configured at transmission mechanism under the situation of printhead downside (updrift side of transport path), the utility model is suitable for too.
In the present embodiment, transmission gear 65 and transmission gear 66 are the trade names with Pochikon (Da mound chemicals) make, but can be not limited only to this.For example, also can be metal material, the consideration accuracy of gear, wearability, unit price are determined to get final product.And if with its train that is used in close feeding-in roll, effect is better.
In the present embodiment, transmit gear 66 and using above-mentioned material with transmitting gear 66 engagements and make in the high gear of transmission gear 65 these 2 degree of influence of transmitting the rotation of gear 66 speedups, if but in paper pushing gear 67, also use, then effect will further improve.
Claims (8)
1. printer is characterized in that having:
The 1st framework,
Can be installed in the 2nd framework on described the 1st framework with opening and closing,
Printhead,
Close described the 2nd framework, the then relative pressing plate that disposes, determines the print position of this printhead with described printhead,
Be installed on described the 1st framework the 1st gear and
Be installed on described the 2nd framework, close described the 2nd framework, then be the 2nd gear with the state of described the 1st gears engaged;
Set the position relation of the described the 1st and the 2nd gear, so that under the state that meshes between the described the 1st and the 2nd gear, in this meshing point, by from the power of described the 1st framework, produce along the 1st component of the direction of closing described the 2nd framework with from the 2nd component of the first side of described printing towards described pressing plate to described the 2nd framework effect.
2. printer according to claim 1 is characterized in that,
Act on the direction of the power of described meshing point, be set in the angular range that surrounds by the 1st line segment and the 2nd line segment; Under the situation of observing with the direction of the pivot line parallel of described the 1st gear and the 2nd gear, described the 1st line segment connects the on-off action central point of described meshing point and described the 2nd framework, and described the 2nd line segment is by described meshing point and with parallel to the power of described pressing plate function from described printhead.
3. printer according to claim 2 is characterized in that,
On described the 1st framework, be equipped with described the 1st gear and described printhead,
On described the 2nd framework, be equipped with described the 2nd gear and described pressing plate.
4. printer according to claim 3 is characterized in that also having:
The paper pushing motor of lift-launch on described the 1st framework,
Lift-launch on described the 2nd framework feeding-in roll and
Lift-launch on described the 1st framework, close the air roll that described the 2nd framework then contacts with described feeding-in roll;
Close described the 2nd framework, then form the driving force bang path that the revolving force of described paper pushing motor is transmitted to described feeding-in roll from described the 1st gear, via described the 2nd gear.
5. printer according to claim 4 is characterized in that also having:
With the paper pushing gear of described feeding-in roll one rotation and
Mesh, transmit the 1st transmission gear of the rotation of described paper pushing motor with this paper pushing gear;
Described the 1st transmission gear is to use the material harder than described the 2nd gear to form.
6. printer according to claim 5 is characterized in that also having:
With form than the harder material of described the 2nd gear, with the described the 1st transmit the 2nd of gears engaged and transmit gear.
7. printer according to claim 1 is characterized in that,
Described printhead is an impact type printhead,
Described the 1st framework be provided with can from above the ribbon cartridge installation portion of ribbon cartridge is installed.
8. printer according to claim 4 is characterized in that,
Described feeding-in roll to be under the closing state at described the 2nd framework, is positioned at the more form of upside than described pressing plate, carries on the 2nd framework,
Described air roll to be positioned at the more form of upside than described printhead, carries on described the 1st framework.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003127319 | 2003-05-02 | ||
| JP2003127319 | 2003-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2734483Y true CN2734483Y (en) | 2005-10-19 |
Family
ID=34362584
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420051106 Expired - Fee Related CN2734483Y (en) | 2003-05-02 | 2004-04-29 | Printer |
| CNB2004100385250A Expired - Fee Related CN1302936C (en) | 2003-05-02 | 2004-04-29 | Printer |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100385250A Expired - Fee Related CN1302936C (en) | 2003-05-02 | 2004-04-29 | Printer |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN2734483Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302936C (en) * | 2003-05-02 | 2007-03-07 | 精工爱普生株式会社 | Printer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0687250A (en) * | 1992-09-07 | 1994-03-29 | Murata Mach Ltd | Image forming apparatus |
| US6121000A (en) * | 1999-02-11 | 2000-09-19 | Genesense Technologies, Inc. | Antitumor antisense sequences directed against R1 and R2 components of ribonucleotide reductase |
| EP1270242B1 (en) * | 2001-06-25 | 2006-05-24 | Seiko Epson Corporation | Printer |
| CN2516346Y (en) * | 2001-09-27 | 2002-10-16 | 蛇口广华电子技术有限公司 | Easy paper feed small-sized printer |
| CN2734483Y (en) * | 2003-05-02 | 2005-10-19 | 精工爱普生株式会社 | Printer |
-
2004
- 2004-04-29 CN CN 200420051106 patent/CN2734483Y/en not_active Expired - Fee Related
- 2004-04-29 CN CNB2004100385250A patent/CN1302936C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302936C (en) * | 2003-05-02 | 2007-03-07 | 精工爱普生株式会社 | Printer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1550351A (en) | 2004-12-01 |
| CN1302936C (en) | 2007-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |