CN1579795A

CN1579795A - Printer

Info

Publication number: CN1579795A
Application number: CN 200410059037
Authority: CN
Inventors: 久下英七; 池田恭之; 大山刚司
Original assignee: Oki Electric Industry Co Ltd
Current assignee: Oki Electric Industry Co Ltd
Priority date: 2003-07-31
Filing date: 2004-07-29
Publication date: 2005-02-16
Anticipated expiration: 2024-07-29
Also published as: CN100421962C; JP2005047075A; JP4089536B2

Abstract

The invention enables stable printing and to surely prevent generation of noise and deterioration of printing quality even when a medium changes its thickness in the halfway and even when the medium is a bankbook and has a sturdy folding part, by preventing the medium from floating from a platen by a simple configuration. The printer has a printing head 15 which moves in a direction orthogonal to a transfer direction of the medium 18 and carries out printing onto the medium 18, a ribbon guide 16 which moves with the printing head 15 and contacts an upper face of the medium 18 to hold an interval between the printing head 15 and the medium 18, the platen 17 which moves up and down to the printing head 15 and presses the medium 18 from below against the ribbon guide 16, and an upside guide and a downside guide of a medium transfer path. The downside guide is equipped with a projection which projects upward near an end of the platen 17 side.

Description

Printer

Technical field

The present invention relates to printer.

Background technology

In the past, in the financial institution of bank, post office, credit national treasury etc.,, used the printer (for example, with reference to patent documentation 1) of bankbook accounting machine etc. in order on the bankbook of deposit booklet etc., to keep accounts.In this printer, for as the assigned position lettering of the bankbook of medium and keep accounts, be the roller that transports roller etc. that transports on the path by being configured in, will be transported to printing portion from inserting a mouthful bankbook that inserts the bankbook accounting machine.Here, this printing portion has printhead, across transporting the path, the top guide member of lettering pressing plate relative with above-mentioned printhead and guiding bankbook.In addition, this guide member is installed on the printhead.Like this, if bankbook arrives printing portion, then the lettering pressing plate rises, support bankbook below, with the top pushing of bankbook to guide member.With this, bankbook becomes the state of guided member and the clamping of lettering pressing plate, because the interval of the top and printhead of bankbook remains on the distance of regulation, so can stably carry out by the lettering to bankbook that printhead carried out.

But bankbook is to be inserted into the bankbook accounting machine under the state of opening, and makes thickness different because of the page or leaf of opening is different.For example, be to insert at the state of opening initial page or leaf under the situation of bankbook of bankbook accounting machine, with respect to the thin thickness of the first half of carriage direction, and after broken line, promptly latter half of thickness is thick.Therefore, if the lettering pressing plate supports the following constant height of bankbook, then can not be corresponding with above-mentioned varied in thickness.Therefore, above-mentioned lettering pressing plate supports by the spring members that is made of helical spring etc., by the elastic force of this spring members, upward to reinforcing, below the pushing bankbook.With this, the following height of lettering pressing plate support bankbook can absorb the variation of the thickness of bankbook.

(for example, with reference to No. 2525906 communique of utility model registration).

Summary of the invention

But, in above-mentioned printer in the past, when the broken line part of inserting the bankbook of bankbook accounting machine at the state of opening initial page or leaf contacts with the edge of side nearby of lettering pressing plate, the lettering pressing plate is pressed down, the first half of thin thickness floats from the lettering pressing plate, produce so-called sky and beat phenomenon, or producing sky beats the such noise that is accompanied by lettering of sound, or the shallow problem of lettering is arranged.

Fig. 4 is the figure of the float state of the bankbook in the printer that is illustrated in the past.

In the drawings, the 101st, the bankbook of deposit booklet etc. is inserted under the state of opening initial page or leaf in the bankbook accounting machine as printer, is transported to nearby that the medium of side transports path 102 and inboard medium transports in the path 103.Here, transport on the path 102 at the above-mentioned medium of side nearby, set pressure roll 104, the side medium transports in the path 102 to make its peripheral part be projected into nearby from the hole portion on the upside guide member 102a of being formed at.In addition, transport on the path 103 at above-mentioned inboard medium, set and transport roller 104, making its peripheral part be projected into above-mentioned inboard medium from hole (hole) portion on the upside guide member 103a of being formed at transports in the path 103, set pressure roll 105, make its peripheral part be projected into inboard medium and transport in the path 103 from the hole portion on the downside 103b of being formed at.In addition, with respect to the thin thickness of the first half 101b of the carriage direction of above-mentioned bankbook 101, thick with respect to the thickness of the latter half of 101a of carriage direction.

At first, the side medium transports in the path 102 if bankbook 101 is inserted into nearby, then by there not being illustrated transporting to use drive source, make and transport roller 104 rotations, above-mentioned bankbook 101 is by transporting roller 104 and pressure roll 105 by from up and down clamping, towards printhead 106, being transported to nearby, the side medium transports in the path 102.Like this, if the print position of the first half 101b of bankbook 101 arrive above-mentioned printhead 106 leading section under, then by there not being illustrated transporting use drive source, make 108 risings of lettering pressing plate.With this because lettering pressing plate 108 pushes the first half 101b of bankbook 101 upward, so this first half 101b's is top by lettering pressing plate 108, be pushed to ribbon guide 107 on the leading section that is installed in above-mentioned printhead 106 below.Like this, sandwich between lettering pressing plate 108 and the ribbon guide 107, and make the interval of leading section of the top and printhead 106 of this first half 101b remain on the predetermined distance that is suitable for lettering by first half 101b with bankbook 101.Therefore, the lettering to the first half 101b of bankbook 101 that is undertaken by printhead 106 can stably carry out.

But, if because line feed etc., and with bankbook 101 further inwards side direction (left in the drawings to) transport, first half 101b in bankbook 101 and the boundary section of latter half of 101a, promptly, the broken line part of bankbook, such as shown in the figure, if arrive the leading section of lettering pressing plate 108, then because latter half of 101a is thicker than first half 101b, so the front end of above-mentioned latter half of 101a, that is, the broken line side contacts with side nearby (right side in the drawings) ora terminalis of ribbon guide 107 and lettering pressing plate 108.

Here, ribbon guide 107 is installed in the leading section of printhead 106, can be upward to moving.Therefore, the broken line side of latter half of 101a is subjected to being pushed downwards from such power shown in the arrow a among the figure of ribbon guide 107.With this, on bankbook 101, produce with lettering pressing plate 108 nearby the point that contact of side edge be the center, the torque of such direction shown in the arrow c among the figure.Its result is, near the broken line among the first half 101b in bankbook 101 part is subjected to the power of such direction shown in the arrow c among the figure, if carry out lettering at the first half 101b of the state that above lettering pressing plate 108, floats, then produce the empty phenomenon of beating, or produce and to resemble the empty noise of beating the sound that is accompanied by lettering, or lettering is shallow, and the lettering quality is reduced.

In addition, at above-mentioned bankbook 101 is new product, the state of opening page or leaf very carefully is inserted under the situation of bankbook accounting machine down, because the broken line of bankbook 101 part is strong, so the broken line of seeing from the side partly is the V font, near the part the broken line among the first half 101b in bankbook 101 is floated above lettering pressing plate 108.So, if the first half 101b that is in the state that floats above this lettering pressing plate 108 is carried out lettering, then produces the empty phenomenon of beating, or produce and resemble the empty noise of beating the sound that is accompanied by lettering, or lettering is shallow, makes the reduction of lettering quality.

The present invention is exactly in order to solve the problem points of above-mentioned printer in the past, so that a kind of printer to be provided is purpose, that is,, prevent that medium from floating from the lettering pressing plate by simple formation, even medium is the medium that varied in thickness is arranged halfway, also have, even medium is a bankbook, the medium that broken line part intensity is big, also lettering stably can be carried out, the generation of noise or the reduction of lettering quality can be prevented effectively.

Description of drawings

Fig. 1 is the figure that is illustrated in the formation of the downside guider that is formed with jut in the embodiment.

Fig. 2 is the skeleton diagram of the printer in embodiment.

Fig. 3 is the figure that is illustrated in the effect of the jut in the embodiment.

The specific embodiment

Below, one side is with reference to accompanying drawing, and one side is elaborated with regard to embodiments of the present invention.

Fig. 2 is the skeleton diagram of printer in embodiments of the present invention.

In the drawings, the 10th, printer, have the medium that inserts medium 18 and insert mouth 19, the medium of side nearby that transports the path as the medium that transports medium 18 transports path 11 and inboard medium transports path 12, along this nearby the side medium transport path 11 and inboard medium transports path 12, be equipped with a plurality of roller 13 and pressure rolls 14 of transporting, being provided in the above-mentioned medium of side nearby transports path 11 and inboard medium and transports printhead 15 in the printing portion 20 between the path 12, carry this printhead 15 and do not have illustrated carrier, or be provided in the ribbon guide 16 of the leading section of this printhead 15, and be provided in lettering pressing plate 17 in the printing portion 20.

Here, above-mentioned printer 10 is in the financial institution of bank, post office, credit national treasury etc., is used for the bankbook accounting machine of keeping accounts on the bankbook of deposit booklet etc. etc.Automatic cashier), CD (Cash Dispenser: the part of such other devices such as automatic trading apparatus and the constituting ATM machine) above-mentioned printer 10 also can be used as the bankbook accounting machine and constitutes separately, can also be as ATM (AutomaticTeller Machine:.

In the present embodiment, medium 18 is the objects that carry out lettering by printer 10.In addition, following bill is arranged in the kind of medium 18, that is, or as the bankbook of deposit booklet etc. and record the transaction details list that the client of financial transaction detail uses and use, or be used for business, or be used for the sola bill of the maintenance etc. of printer 10 in financial institution inside.Here, paper of many etc. are overlapping for the medium 18 of book shape is called bankbook, and the medium 18 that will be made of individual paper etc. is called sola bill.In addition, usually, in sola bill, have the size after bankbook closed the size of closing sola bill and open the sola bill of opening size of bankbook size.

And, transport roller 13 set into, peripheral part is projected into nearby from the hole portion that transports the upside guider 11a in path 11 and upside guider 12a that inboard medium transports path 12 at side medium nearby and form that the side medium transports path 11 and inboard medium transports in the path 12, by gear, toothed belt etc., transmit from the drive source drives power of using of transporting that does not have illustrated stepper motor etc.In addition, above-mentioned pressure roll 14 set into, peripheral part is projected into nearby from the hole portion that transports the downside guider 11b in path 11 and downside guider 12b that inboard medium transports path 12 at side medium nearby and form that the side medium transports path 11 and inboard medium transports in the path 12, is transported roller 13 pushings to above-mentioned.Like this, above-mentioned medium 18 is by transporting roller 13 and pressure roll 14 from being held up and down, thereby is transported.In this case, the above-mentioned roller 13 that transports is to produce under the situation of strict control concentricity, appearance and size etc., for example, can go on foot the amount of feeding of 1/180 (inch) with each, and medium 18 is transported in stepping.Have, the surface of transporting roller 13 is at least formed by high friction means, frictional force can be applied on the medium 18 again.

In addition, above-mentioned printhead 15 can adopt the recording mode of ink jet type, thermal, stylus formula, heat transfer type etc., also can be any one recording mode.Like this, printer 10 in the present embodiment, its printhead 15 is moving with the direction of carriage direction (left and right directions in the drawings) quadrature of medium 18 direction of drawing (in the drawings perpendicular to).That is, be by scanning, on above-mentioned medium 18, carry out the string type printer of lettering.In this case, above-mentioned printhead 15 carries not to be had on the illustrated carrier, and this carrier is slidably mounted on not having on the illustrated axis of guide of extending in the scanning direction.In addition, the above-mentioned axis of guide is fixed on the framework of printer 10.Like this, if medium 18 is set in assigned position, then above-mentioned carrier moves in the scanning direction along medium 18, and printhead 15 carries out lettering on above-mentioned medium 18.Then, once more, above-mentioned carrier moves in the scanning direction along medium 18, and printhead 15 carries out lettering on above-mentioned.Then, by same repeatedly action, at the fixed lettering of above-mentioned medium 18 enterprising professional etiquettes.

Like this, printer 10 in the present embodiment carries out lettering on the different medium 18 of the such thickness of bankbook or sola bill.Particularly, be under the situation of bankbook at medium 18, or the page or leaf difference thickness difference because of opening, or local thickness changes.For example, insert under for the state of opening initial page or leaf under the situation of bankbook of bankbook accounting machine, with respect to the thin thickness of the first half of carriage direction, after broken line, that is, latter half of thickness is thick.On the other hand, insert under for the state of opening last page or leaf under the situation of bankbook of bankbook accounting machine, thick with respect to the thickness of the first half of carriage direction, after broken line, that is, and latter half of thin thickness.

Therefore, when printhead 15 moves in the scanning direction along medium 18, need guarantee that being spaced apart of above-mentioned printhead 15 and medium 18 is certain.Therefore, on above-mentioned carrier, the ribbon guide 16 above the guiding medium 18 is installed.In addition, this ribbon guide 16 also can be installed on the printhead 15.Above-mentioned ribbon guide 16 preferably spreads all over the front and back of printhead 15 and forms.In addition, be under the situation of stylus formula at above-mentioned printhead 15, ribbon guide 16 has the function that the China ink band is contacted with medium 18.

In addition, for the position of the inside of limiting above-mentioned medium 18, with lettering pressing plate 17 be configured to relative with printhead 15 to.Above-mentioned lettering pressing plate 17 does not move up and down device by there being illustrated lettering pressing plate, moves up and down with respect to printhead 15, if medium 18 arrives printing portion 20, it is moved at above-below direction.Like this, above-mentioned lettering pressing plate 17 is from direction ribbon guide 16 pushing mediums 18 down.Like this, by medium 18 being sandwiched between lettering pressing plate 17 and the ribbon guide 16, just the leading section of above-mentioned printhead 15 and the interval of medium 18 can be remained on the predetermined distance that is suitable for lettering.

That is, above-mentioned printer 10 is a benchmark with the leading section of printhead 15 or the position of ribbon guide 16, for the interval with above-mentioned printhead 15 and medium 18 remains on the predetermined distance that is suitable for lettering, and lettering pressing plate 17 is moved, the position of restriction medium 18.Because the interval of above-mentioned printhead 15 and medium 18 is remained on the predetermined distance that is suitable for lettering, so the lettering to medium 18 that is undertaken by printhead 15 can stably carry out.

In addition, transport on the path 12 at inboard medium, setting does not have illustrated automatic page turning device (ATP:Auto Turn Page).Like this, be under the situation of bankbook at above-mentioned medium 18, when needing page turning, above-mentioned medium 18 is admitted to inboard medium and transports in the path 12, after carrying out page turning by above-mentioned automatic page turning device, inserts the direction of mouth 19 to medium and transports, and carries out lettering in printing portion 20.

Then, the front side medium transports the formation of the downside guider 11b and the downside guider 12b that inboard medium transports path 12 in path 11 nearby, describes.

Fig. 1 is the figure of formation that represents to be formed with in embodiments of the present invention the downside guider of jut.

As shown in Figure 1, near nearby the side medium transports the end of lettering pressing plate 17 sides (left side in Fig. 1) among the downside guider 11b in path 11, integrally formed outstanding upward jut 11c.The medium guide surface of the part beyond the medium guide surface of this jut 11c (upper side in Fig. 1) and the jut 11c in downside guider 11b is compared, and is positioned at the following position near ribbon guide 16,, is positioned at the top position that is.In addition, near inboard medium transports the end of lettering pressing plate 17 sides (right side in Fig. 1) among the downside guider 12b in path 12, integrally formed outstanding upward jut 12c.The medium guide surface of this jut 12c (upper side in Fig. 1) is identical with above-mentioned jut 11c, compare with the medium guide surface of part beyond the jut 12c in downside guider 12b, be positioned at lower position, that is, be positioned at the top position near ribbon guide 16.In addition, nearby the side medium transports the upside guider 11a in path 11 and the medium guide surface (downside in Fig. 1) of the upside guider 12a that inboard medium transports path 12, is positioned at the position with the following equal height of ribbon guide 16.

Here, above-mentioned jut 11c and jut 12c are respectively single, also can form similarly extending with the direction (with the vertical direction of drawing among Fig. 1) of carriage direction (left and right directions in Fig. 1) quadrature of medium 18.That is, also can form respectively and to be a linearity in direction and to extend with the carriage direction quadrature of medium 18.Have again, by on jut 11c and jut 12c, form rake or arc sections, just front end or the rear end that can not block medium 18.

In addition, above-mentioned jut 11c and jut 12c are respectively a plurality of, also can form in the direction devices spaced apart of keeping straight on the carriage direction of medium 18.That is, a plurality of jut 11c and jut 12c form discontinuously in the direction of keeping straight on the carriage direction of medium 18.In addition, in this case, between the adjacent jut 11c and the interval between the jut 12c is preferably compared with the width (with the size of carriage direction craspedodrome direction) of medium 18 and will be lacked a lot.

Have, above-mentioned jut 11c and jut 12c also can be not integrally formed with downside guider 11b and downside guider 12b again.That is, downside guider 11b and downside guider 12b form respectively, also can be installed on downside guider 11b and the downside guider 12b.

Then, the effect with regard to above-mentioned jut 11c and jut 12c describes.

Fig. 3 is the figure that represents the effect of jut in embodiments of the present invention.

At first, the action for the printer 10 under the situation of the same thickness describes with regard to medium 18.If above-mentioned medium 18 is inserted into medium and inserts mouthfuls 19, then transport roller 13 from transporting to be passed to drive source drives power, make this transport roller 13 and rotate.Like this, above-mentioned medium 18 as shown in Figure 1, by transporting roller 13 and pressure roll 14 from being held up and down, towards printing portion 20, being transported to nearby, the side medium transports in the path 11.

In this case, printhead 15 is located at the position of accepting medium in the outer fix of width of medium 18.Like this, the lettering pressing plate moves up and down device lettering pressing plate 17 downward directions is moved.That is, lettering pressing plate 17 is descended.Therefore, as shown in Figure 1, enlarge between lettering pressing plate 17 and the ribbon guide 16, medium 18 can be passed through swimmingly.

Like this, if medium 18 arrives assigned position, then transport roller 13 and stop operating.With this, set position with respect to the carriage direction of medium 18.Then, above-mentioned carrier is along the width of medium 18 to this medium 18, that is, move the scanning direction, the print position that printhead 15 arrives on the above-mentioned medium 18.So if printhead 15 moves on above-mentioned medium 18, then lower device and printhead 15 interlocks on the lettering pressing plate make lettering pressing plate 17 upward to moving.That is, lettering pressing plate 17 is risen.Therefore, medium 18 is clamped between lettering pressing plate 17 and the ribbon guide 16, and the interval of above-mentioned printhead 15 and medium 18 is remained on the predetermined distance that is suitable for lettering.

In addition, above-mentioned lettering pressing plate 17 does not support by there being illustrated spring members.Therefore, the elastic force of above-mentioned lettering pressing plate 17 by spring members is upward to reinforcing, be pushed to medium 18 below.Like this, by medium 18 being sandwiched, and make the above-mentioned printhead 15 and the interval of medium 18 remain on the predetermined distance that is suitable for lettering because of between the lettering pressing plate 17 and ribbon guide 16 that push away on the spring members.With this, though the varied in thickness of medium 18, also can be by above-mentioned lettering pressing plate 17 move up and down the variation of the thickness of absorbing medium 18.

Then, following situation is described, promptly, as shown in Figure 3, medium 18 is a bankbook, for example, under the state of opening initial page or leaf and insert medium and insert under mouthfuls 19 the situation,, thick as the thickness of the latter half of 18a of the later part of broken line with respect to the thin thickness of the first half 18b of carriage direction.

In this case, if the print position of the first half 18b of medium 18 arrive above-mentioned printhead 15 leading section under, then by there not being illustrated drive unit, lettering pressing plate 17 is risen.With this, make the interval of leading section of top and printhead 15 of the first half 18b of medium 18 remain on the predetermined distance that is suitable for lettering, the lettering to above-mentioned first half 18b that is undertaken by printhead 15 is stably carried out.Like this, at the lettering of finishing certain row, under the situation about entering a new line for the lettering that carries out next line, medium 18 is further transported to the direction of inboard (left in Fig. 3 to), first half 18b in medium 18 and the boundary section of latter half of 18a, that is, the broken line of bankbook part arrives the front-end edge of lettering pressing plate 17 as shown in Figure 3.Because the latter half of 18a in medium 18 is thicker than first half 18b, so if the broken line of bankbook partly arrives the front-end edge of lettering pressing plate 17, the front end of above-mentioned latter half of 18a then, that is, the broken line side contacts with side nearby (right side in Fig. 3) ora terminalis of ribbon guide 16 and lettering pressing plate 17.

Here, ribbon guide 16 is installed on printhead 15 or the carrier, can be upward to moving.Therefore, the broken line side of latter half of 18a is subjected to the power of descending direction in the drawings from ribbon guide 16, is pressed down downwards.But, in the present embodiment, near nearby the side medium transports the end of lettering pressing plate 17 sides of the downside guider 11b in path 11, integrally formed outstanding upward protuberance 11c.Therefore, owing to make near the above-mentioned jut 11c of passing through of the broken line side of latter half of 18a upward to moving, so the point that can not produce on medium 18 to contact with the edge of side nearby of lettering pressing plate 17 is the center, in the drawings around clockwise turning moment.Therefore, near part the broken line in the first half 18b of medium 18 since be not subjected in the drawings on the power of direction, so can above lettering pressing plate 17, not float, can carry out lettering stably by printhead 15 to be sandwiched the state between lettering pressing plate 17 and the ribbon guide 16.

Like this,, do not beat phenomenon above lettering pressing plate 17, can not produce the empty such noise that is accompanied by lettering of sound of beating so can not produce sky because part can not floated near the broken line in the first half 18b of medium 18.In addition, it is shallow also not have lettering, can prevent the reduction of lettering quality effectively.

In addition, in Fig. 3,, opened between first half 18b top of following and medium 18 of ribbon guide 16 in order to illustrate, and between the following and lettering pressing plate 17 of the first half 18b of medium 18 top.But, in practice, because the first half 18b of medium 18 is sandwiched between lettering pressing plate 17 and the ribbon guide 16, so above the first half 18b of the following and medium 18 of ribbon guide 16, and the following and lettering pressing plate 17 of the first half 18b of medium 18 above engage each other closely.

So, even further transported by side direction inwards at medium 18, carry out under the situation of lettering on the print position of latter half of 18a in medium 18, also be that the latter half of 18a that is medium 18 is sandwiched the state between lettering pressing plate 17 and the ribbon guide 16, can carry out lettering stably by printhead 15.In this case, above-mentioned lettering pressing plate 17 supports by spring members, and the elastic force by this spring members is upward to reinforcing, be pushed to medium 18 below.Therefore, even its first half of the thickness of medium 18 18b is different with latter half of 18a, that is, even the thickness of medium 18 is that the boundary changes with the broken line of bankbook, the variation of the thickness that the following height that lettering pressing plate 17 supports mediums 18 also can absorbing medium 18.

Then, following situation is described, promptly, medium 18 is a bankbook, and for example, the result who carries out page turning is under the state of opening last page or leaf, transporting path 12 from inboard medium inserts under mouthful 19 situations of transporting to medium, the thickness of first half 18b is thick, and the medium 18 of the thin thickness of latter half of 18a is transported in the other direction, carries out lettering.

Inserting mouthful 19 mediums 18 that insert at the medium from printer 10 is bankbook, need carry out under the situation of lettering at following one page, and above-mentioned medium 18 is admitted to inboard medium and transports in the path 12, carries out page turning by the automatic page turning device.Like this, the medium 18 that carried out page turning inserts mouth 19 to medium and is transported in the other direction, sends into printing portion 20.In this case, above-mentioned medium 18 its first half 18b (from medium insert mouthfuls 19 be seen as latter half of) thickness thick, as the thin thickness of the latter half of 18a of the later part of broken line (insert mouthfuls 19 from medium and be seen as first half).That is, with shown in Figure 3 routine opposite.

Like this, because if the print position of the latter half of 18a of medium 18 arrive above-mentioned printhead 15 leading section under, lettering pressing plate 17 is risen, the interval of the leading section of the top and printhead 15 of the latter half of 18a of medium 18 is remained on the predetermined distance that is suitable for lettering, so the lettering to above-mentioned latter half of 18a that is undertaken by printhead 15 is stably carried out.Then, at the lettering of finishing certain row, under the situation about entering a new line for next line is carried out lettering, medium 18 is further transported to the direction of medium insertion mouth 19, and the broken line of the bankbook in medium 18 partly arrives the end edge of lettering pressing plate 17.Because the first half 18b in medium 18 is thicker than latter half of 18a, so if the broken line of bankbook partly arrives the end edge of lettering pressing plate 17, the broken line side of then above-mentioned first half 18b contacts with the end edge of ribbon guide 16 and lettering pressing plate 17.

Here, ribbon guide 16 is installed on printhead 15 or the carrier as mentioned above, can be upward to moving.Therefore, the broken line side of first half 18b is subjected to the power from the following direction of ribbon guide 16, is subjected to the power of downward direction, is pressed down downwards.But, transport near the end of lettering pressing plate 17 sides of downside guider 12b in path 12 integrally formed outstanding upward jut 12c at inboard medium.Therefore, owing to make near the above-mentioned jut 11c of passing through of the broken line side of first half 18b upward to moving, so the point that can not produce on medium 18 to contact with the edge of side nearby of lettering pressing plate 17 is the center, around anticlockwise turning moment.Therefore, near the broken line in the latter half of 18a of medium 18 part is not owing to be subjected to the power of direction, so can above lettering pressing plate 17, not float, can carry out lettering stably by printhead 15 to be sandwiched the state between lettering pressing plate 17 and the ribbon guide 16.

So, even inserting mouth 19 at medium 18 to medium is further transported, carry out under the situation of lettering on the print position of first half 18b in medium 18, also be that the first half 18b that is medium 18 is sandwiched the state between lettering pressing plate 17 and the ribbon guide 16, can carry out lettering stably by printhead 15.In this case, above-mentioned lettering pressing plate 17 supports by spring members, and the elastic force by this spring members is upward to reinforcing, be pressed to medium 18 below.Therefore, even the thickness of medium 18 is that the boundary changes with the broken line of bankbook, the variation of the thickness that the following height that lettering pressing plate 17 supports mediums 18 also can absorbing medium 18.

Then, following situation is described, that is, medium 18 is a bankbook, for example, under the state of the page or leaf of opening the new product bankbook carefully, inserts under the situation of bankbook accounting machine, and the broken line of bankbook part is strong.

Inserting mouthful 19 mediums 18 that insert at the medium from printer 10 is bankbook, under the strong situation of broken line part, the broken line of seeing from the side partly is the V font, near near the shape of part for retouching into arc part and the broken line in the latter half of 18a broken line in the first half 18b of medium 18.Like this, because if the print position of the first half 18b of medium 18 arrive above-mentioned printhead 15 leading section under, lettering pressing plate 17 is risen, the interval of the leading section of the top and printhead 15 of the first half 18b of medium 18 is remained on the predetermined distance that is suitable for lettering, so the lettering to above-mentioned first half 18b that is undertaken by printhead 15 is stably carried out.

Then, at lettering of finishing certain row, under the situation about entering a new line for the lettering that carries out next line, medium 18 further is transported, and near the part the broken line of the bankbook in medium 18 is pushed upward by above-mentioned jut 11c.Here, the side medium transports above the downside guider 11b in path 11 if near the part the broken line of the bankbook in medium 18 arrives nearby, and the broken line of bankbook is partly pushed upward by above-mentioned jut 11c.Here, because ribbon guide 16 as mentioned above, is installed on printhead 15 or the carrier, can be upward to moving, so near the part the broken line in the first half 18b of medium 18 is subjected to the power from the following direction of ribbon guide 16, is pressed down downwards.In addition, near the part the broken line in the latter half of 18a of medium 18 is subjected to transporting from side medium nearby the power of following direction of the upside guider 11a in path 11, is pushed away down downwards.Therefore, above-mentioned broken line part from the power of clamping up and down a little less than.Have again, even partly arrive at the broken line of bankbook under the state of leading section of lettering pressing plate 17, pass through above-mentioned jut 11c upward to moving, so the broken line of bankbook partly is the state that pushes upward owing to make near the part the broken line in above-mentioned latter half of 18a.Therefore, part can not floated above lettering pressing plate 17 near the broken line in the first half 18b of medium 18, can carry out lettering stably by printhead 15 to be sandwiched the state between lettering pressing plate 17 and the ribbon guide 16.

In addition, medium 18 is transported in the other direction, push away near the part broken line part of bankbook and the broken line on carrying out action under the situation of lettering and being, except inboard medium transports the jut 12c this point of downside guider 12b in path 12, since substantially identical with the situation of carrying out lettering at the mediums 18 that insert mouth 19 insertions from medium, so omit its explanation.

Like this, in the present embodiment, near nearby the side medium transports the end of lettering pressing plate 17 sides among the downside guider 11b in path 11, form outstanding upward jut 11c, near inboard medium transports the end of lettering pressing plate 17 sides among the downside guider 12b in path 12, form outstanding upward jut 12c.

Therefore, at medium 18 is bankbook, under the different situation of the front and back of broken line thickness, even the broken line of bankbook partly arrives the ora terminalis of lettering pressing plate 17, also because by jut 11c or jut 12c, make the thick part of thickness upward to moving, so the part of thin thickness can not floated above lettering pressing plate 17.With this,, carry out lettering stably by printhead 15, so can prevent the generation of noise or the reduction of lettering quality effectively owing to sandwiched state between lettering pressing plate 17 and the ribbon guide 16 with medium 18.

In addition, be bankbook at medium 18, under the strong situation of broken line part, because by jut 11c or jut 12c, with this broken line part pushing upward, so near the part the broken line of medium 18 can not floated above lettering pressing plate 17.With this,, carry out lettering stably by printhead 15, so can prevent the generation of noise or the reduction of lettering quality effectively owing to sandwiched state between lettering pressing plate 17 and the ribbon guide 16 with medium 18.

In addition, the present invention is not limited only to above-mentioned embodiment, also can abide by purport of the present invention and make it distortion, and these are not got rid of in scope of the present invention.

As described above, according to the present invention, by simple formation, even medium is that on the way its thickness changes, even or medium is a bankbook, the broken line part is strong, owing to can prevent that medium from floating from the lettering pressing plate, so can stably carry out lettering, can prevent the generation of noise or the reduction of lettering quality effectively.

Claims

1. a printer has

(a) printhead, this printhead moves to the direction with the carriage direction quadrature of medium, carries out lettering on above-mentioned medium;

(b) ribbon guide, this ribbon guide moves with this printhead, contacts with the top of above-mentioned medium, keeps the interval of above-mentioned printhead and medium;

(c) lettering pressing plate, this lettering pressing plate moves up and down with respect to above-mentioned printhead, pushes to above-mentioned ribbon guide from the below with above-mentioned medium;

(d) medium transports the upside guider and the downside guider in path, it is characterized in that,

(e) above-mentioned downside guider has outstanding upward jut near the end of above-mentioned lettering pressing plate side.

2. printer as claimed in claim 1 is characterized in that, above-mentioned jut and above-mentioned downside guider are integrally formed.

3. printer as claimed in claim 1 is characterized in that, above-mentioned jut and above-mentioned downside guider form respectively, are installed on this downside guider.

4. printer as claimed in claim 1 is characterized in that, above-mentioned jut is configured on the direction with the carriage direction quadrature of above-mentioned medium.

5. printer as claimed in claim 1 is characterized in that, above-mentioned jut with the direction of the carriage direction quadrature of above-mentioned medium, devices spaced apart configuration.

6. printer as claimed in claim 1 is characterized in that, above-mentioned jut is configured in the both sides of above-mentioned printhead with respect to the carriage direction of above-mentioned medium.