JPH07323623A - Printer - Google Patents

Abstract

PURPOSE:To keep the contact state of recording paper to a printing surface constant when a printing head and a platen are set to a proper distance by providing a paper guide prescribing or energizing recording paper toward the platen to the platen movable with respect to a printing head. CONSTITUTION:In a platen 100 movable in order to set a proper interval with respect to a printing head 32, the guide pin 100-1 engaged with the hole provided to a main body frame in order to move the platen 100 when a proper interval is set with respect to the printing head 32, R-side paper guide parts 100-4, 100-5 arranged so as to provide a specific interval with respect to the R-side and J-side auxiliary plates 101, 102 being the paper guides fixed to the platen 100 and the groove in which the side surface guide part guiding the end surface of recording paper is fitted are provided. By prescribing the lateral direction of the recording paper by the side surface guide part, the guide length up to a printing part is made large and the meandering of the recording paper is eliminated to enhance printing quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a platen arranged in a position facing a print head in a printer.

[0002]

2. Description of the Related Art A platen disposed so as to face a print head of a conventional printer has only a printing surface for receiving the printing pressure of the printing head, and a paper guide portion for guiding the recording paper to the printing surface is not provided. It was composed of parts. The platen is movable in order to set an appropriate distance from the print head, but the paper guide for guiding the recording paper to the print surface is fixed to the printer.

[0003]

In the printer having the above structure, when the platen is moved to set an appropriate distance between the print head and the platen, the paper fixed to the printer on the printing surface of the platen is fixed. The positional relationship between the recording paper discharged from the guide in a certain direction and the printing surface of the platen changed. As a result, the amount of contact with the printing surface changes when the recording paper is inserted, and if this amount of contact increases, the insertability may deteriorate and the contact angle between the printing surface and the printing paper may change. However, since it does not adhere to the printing surface and swells toward the print head side, there is a problem in that the printing sound is increased and the printing is stained.

Therefore, the present invention solves such a problem, and an object of the present invention is to set the contact state of the recording paper to the printing surface even when the print head and the platen are set at an appropriate distance. It is to provide a platen that can be kept constant.

[0005]

In order to solve the above-mentioned problems, a printer of the present invention is a printer including a print head and a platen arranged so as to face the print head. It is characterized in that it has a paper guide which is regulated or biased toward the platen and a platen which is attached to the paper guide and is movable with respect to the print head so that the gap between the paper head and the print head can be changed.

A groove or a recess is formed on the platen at a position substantially equal to the width of the recording paper, and a guide is provided on the paper guide so as to be fitted in the groove or the recess to regulate the position of the end face of the recording paper. Further, the paper guide is characterized in that the leading end of the biasing portion of the recording paper is bent and the bending portion biases the recording paper.

[0007]

In the platen having the above structure, since the paper guide is attached to the platen, even if the platen is moved, the correlation between the platen and the paper guide does not change and the contact state of the recording paper does not change.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a printer showing an embodiment of the present invention. The printer according to the first embodiment is roughly classified into a main body drive section (A section in FIG. 1), a carriage section (B section in FIG. 1), a paper feed mechanism section (C section in FIG. 1), and a paper guide section (D section in FIG. 1). Part)
-Around the ribbon cassette (E in Fig. 1) -Around the winding mechanism (F in Fig. 1) -Around the platen (G in Fig. 1) -Around the auto-cutter mechanism (H in Fig. 1). Each structure will be described below.

Around the main body drive (portion A in FIG. 1), the main body motor 1 serves as a drive source for reciprocating the print head 32 in the arrow a1 and arrow a2 directions and a drive source for rotating the paper feed shaft 44.
And its power transmission mechanism. The area around the carriage (B in FIG. 1) is located in front of the carriage guide shaft 34.
And carriage 3 supported on the carriage guide shaft rear 35
1 and the print head 32.

Around the ribbon cassette (portion E in FIG. 1) is composed of a ribbon frame 71 and a ribbon cassette 81 accommodating an ink ribbon 82. Around the winding mechanism (F in Figure 1
The part) is composed of a winding frame 95 and a winding flange 94, and serves to wind up the printed journal paper 50.

FIG. 2 is a view of the printer according to the first embodiment of the present invention around the paper feeding mechanism (C in FIG. 1) and around the paper guide (D in FIG. 1)
FIG. 3 is a perspective view showing a structure around the auto cutter mechanism (portion H in FIG. 1).

Reference numeral 61 is a paper guide fixed to the main body frame 20 with screws by rotatably supporting the R-side guide roller 63 and the J-side guide roller 64, and 62 is a paper guide plate fixed to the paper guide 61. A cutter sensor 140 is fixed to the paper guide 61 and detects the position of the cutter driving gear 138 in the rotational direction by a slit plate 138-1, and a cutter motor gear 131 has a cutter motor gear 131, and a cutter earth plate 132 is sandwiched between the cutter sensor gear 130 and the cutter ground gear 132. It is a fixed cutter motor.

A cutter motor gear 131 is rotatably supported by a cutter first reduction gear shaft 141 fixed to the paper guide 61.
The cutter first reduction gear meshing with the cutter, 135 is the paper guide 6
The cutter second reduction gear 136, which is pivotally supported by the cutter second reduction gear shaft 142 fixed to 1, and meshes with the cutter first reduction gear 136, is pivotally supported by the cutter transmission gear shaft 143 fixed to the paper guide 61. The cutter transmission gear meshes with the second reduction gear of the cutter.

Reference numeral 138 denotes a cutter drive gear which has a cutter drive pin 139 fixed to the side surface and a shield plate 138-1 and which is axially supported by a cutter drive gear shaft 144 fixed to the paper guide 61 and meshes with the cutter transmission gear. Is. When the cutter motor gear 131 rotates in the direction of arrow b1, the cutter drive gear rotates in the direction of arrow c1, and the cutter motor gear 131 moves in the direction of arrow b.
When rotating in two directions, the cutter drive gear rotates in the direction of arrow c2.

Reference numeral 41 denotes a paper feed frame having a paper feed mechanism, which is fixed to the main body frame 20 with a screw. Reference numeral 149 denotes a cutter blade receiver which has a hole 149-1 and is fixed to the paper feed frame with screws, and 145 has an elongated hole 145-1 which engages with the cutter drive pin 139 and an elongated hole 146 of the cutter blade 146. -1 is a cutter lever that has a lever portion 146-2 engaging with -1 and is rotatably attached.

Reference numeral 147 denotes a cutter blade retainer, which is attached to 149 by a screw 148 to guide the cutter blade 146 in the upper direction, and 150 is a hand cutting cutter fixed to the cutter blade retainer 147. When the long hole 145-1 rotates in the arrow d1 direction, the lever portion 146-2 rotates in the arrow e1 direction, and when the long hole 145-1 rotates in the arrow d2 direction, the lever portion 146-2 rotates in the arrow e2 direction. is there.

The internal structure of the cutter blade receiver 149 is shown in FIG.
As shown in FIG. 43 is a paper feed gear that is fixed to the paper feed shaft 44 and meshes with the gear of the paper feed pulley 42; 49 is a journal paper feed roller that is rotatably supported on the paper feed shaft 44 and is rotatable in the direction of arrow f1; Reference numeral 54 is a receipt paper feed roller which is supported on the paper feed shaft 44 and is selectively rotatable in the arrow f1 direction, and 113 is an R side paper push shaft spring which serves to urge the paper press shaft 46 in the arrow g1 direction. .

Reference numeral 114 denotes a J-side paper pressing shaft spring which serves to urge the paper pressing shaft 46 in the direction of arrow h1, and 45 is pivotally supported by the paper pressing shaft 46 to transfer the journal paper 50 to the journal paper feed roller 4
9 is a J-side paper pressing roller that urges 9; 52 is an R-side paper pressing roller that is rotatably supported by the paper pressing shaft 46 and that urges the receipt paper 51 to the receipt paper feeding roller 54; A paper outlet guide fixed to the paper outlet 111, a paper outlet plate 111 supported by the paper retainer shaft 46 and given a rotational force by a paper outlet leaf spring 112, and 119 serving as a bearing for the paper feed shaft 44 and an arrow j1. R having a function of moving the paper pressing shaft 46 in the direction of the arrow g2 by rotating in the direction R
This is the side release lever.

Numeral 120 is a J-side release lever having a function of bearing of the paper feed shaft 44 and having a function of moving the paper pressing shaft 46 in the direction of arrow h2 by rotating in the direction of arrow k1, 121 is adjacent to 54. R-side ratchet wheel arranged and engaged via a spring clutch, 122 is a J-side ratchet wheel 122 arranged adjacent to 49 and engaged via a spring clutch, 117
Is controlled by the R-side paper feed electromagnet 115, and
R side trigger lever whose on / off of engagement with 1 is controlled,
Reference numeral 118 denotes a J-side trigger lever whose ON / OFF of engagement with the J-side ratchet wheel 122 is controlled by controlling the J-side paper feed electromagnet 116.

FIG. 5 is a detailed perspective view around the platen (G portion in FIG. 1) of the printer of one embodiment of the present invention. A guide 100-1 of the platen 100 is engaged with a hole formed in the main body frame 20 in order to smoothly move the platen 100 in the direction of the arrow n1 or n2 when setting an appropriate gap with the print head 32. It's a pin. Platen 100
Reference numeral 100-2 is a screw hole for fixing an appropriate interval with the print head 32 and then fixing it to the main body frame 20 with the screw 103.

100-3 of the platen 100 is a recording paper 5
This is a printing surface that receives the printing pressure of the print head 32 that forms graphics and characters by transferring the ink impregnated in the ribbon 82 to 0. Reference numeral 100-4 of the platen 100 is an R-side paper guide portion which is arranged at an arbitrary interval from the R-side auxiliary plate 101 which is a paper guide fixed to the platen 100.

Reference numeral 100-5 is an R-side paper guide portion which is arranged at an arbitrary distance from the J-side auxiliary plate 102 which is a paper guide fixed to the platen 100. Reference numeral 100-6 is a groove portion provided in the platen 100, and side surface guide portions 101-1 and 101-2 for guiding the end surface of the recording paper 50 and 10
2-1 and 102-2 are inserted. Therefore, the recording paper 50 has its width direction in the side surface guide portions 101-1 and 101-.
2, and the guide length to the printing portion becomes long because of being restricted by 2, 102-1 and 102-2, the meandering of the recording paper is eliminated, and the printing quality is greatly improved. In this embodiment, the side guide portion is fitted in a groove shape. However, a recess is formed in the platen instead of the groove, and even if it is fitted in the recess, the end face of the recording paper is surely brought into contact with the end face guide, and therefore the same. The effect can be obtained.

The R-side auxiliary plate 101 has a side surface guide portion 1 for arranging the recording paper 50 at an arbitrary position on the stamp surface 100-3.
01-1, 101-2 and the recording paper 50 on the platen 100
It has an R-shaped R paper pressing portion 101-3 for urging the stamp surface 100-3 of No. 3 and is fixed to the platen 100. The J side auxiliary plate 102 has a side surface guide portion 102-for arranging the recording paper 50 at an arbitrary position on the stamp surface 100-3.
1, 102-2, and an R-shaped J paper pressing portion 1 for urging the recording paper 50 against the stamp surface 100-3 of the platen 100.
02-3, and is fixed to the platen 100. R
The side auxiliary plate 101 and the J side auxiliary plate 102 are made of an elastic body having a spring property.

FIG. 6 is a sectional view of the receipt paper 51 around the platen according to the first embodiment of the present invention. The receipt paper 51 is
The platen 100 comes into contact with the R-side guide roller 63 inserted from the direction of the arrow m1 and rotatably supported by the paper guide 61, passes through the inside of the paper guide 61, and passes through the slit formed by the paper guide 61 and the paper guide plate 62. R side paper guide section 10
0-4 and R side auxiliary plate 101 fixed to the platen 100
To the space formed by and.

The receipt paper 51 passes through the gap set by the R-side paper guide portion 100-4 of the platen 100 and the R-side auxiliary plate 101 and contacts the R-shaped paper pressing portion 101-3 of the R-side auxiliary plate 101. Then, the printing surface 100-3 of the platen 100 arranged at a position facing the print head 32 is urged. The receipt paper 51 passing through the stamp surface 100-3 is
The paper is fed by going to a paper feeding mechanism portion constituted by the receipt feeding roller 54, the R-side pressing roller 52 and the like, or by controlling the paper feeding mechanism portion.

The gap between the R-side paper guide portion 100-4 and the R-side auxiliary plate 101 and the R-paper pressing portion 101-3 are such that when the receipt paper 51 is inserted into the printer, the receipt paper 51 is printed on the printing surface 100 of the platen 100. It is set so that the load that contacts -3 is appropriate, and even if the receipt paper 51 is fed by the paper feed mechanism unit, the receipt paper 51 is set so as to always be in close contact with the stamp surface 100-3. J side paper guide section 100
-5 and the gap between the J side auxiliary plate 102 and the J paper pressing portion 102
The same applies to -3.

The platen 100, which is arranged at a position facing the print head, sets an appropriate gap between the print head 32 and the stamp surface 100-3 of the platen 100 in order to secure a clear print quality on the receipt paper 51. Therefore, it is necessary to move it in the direction of the arrow n1 or n2 and fix it to the main body frame 20 with the screw 103. At this time, the paper guide portion 100-4 of the platen 100 and the R auxiliary plate 101 and the J side auxiliary plate 102, which are made of an elastic body having a spring property and fixed to the platen 100, have a positional relationship with the stamp surface 100-3 of the platen 100. , And is fixed by moving in the direction of the arrow n1 or n2.

In this embodiment, the R auxiliary plate 101 and the J side auxiliary plate 102, which are the paper guides fixed to the platen, are attached with a gap to the platen, but the same effect is obtained even if they contact the platen. Is what you get.

[0029]

In the printer constructed as described above, since the positional relationship between the platen 100 and the R-side auxiliary plate 101 is always constant, the recording paper when the recording paper is inserted into the printer is the printing surface of the platen. There is no change in the contacting load or the state in which the recording paper being printed is in close contact with the printing surface of the platen.

Further, since the recording paper is guided to a position close to the printing surface of the platen by the side guide of the auxiliary plate fixed to the platen, the straightness of the paper can be secured and the characters and figures are printed on the recording paper at the correct positions. can do.

When the release lever is operated and the recording paper is pulled out from the printer in the direction of the arrow m2, the recording paper is urged by the R-shaped paper pressing portion of the auxiliary plate fixed to the platen. Even if the edge of the paper is torn, it will not be caught and the recording paper will not be torn.

Therefore, the printer can always ensure smooth and constant insertion and removal of the recording paper, secure clear print quality, and secure low-noise printing, and the effect of the present invention is very high. Can be said to be large.

[Brief description of drawings]

FIG. 1 is an overall perspective view of the structure of a printer that is an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a structure around a paper feeding mechanism, a paper guiding mechanism, and an auto cutter mechanism of a printer according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a structure around a paper feeding mechanism of the printer according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a structure around a paper feeding mechanism of the printer of one embodiment of the present invention.

FIG. 5 is a perspective view showing the structure around the platen of the printer of one embodiment of the present invention.

FIG. 6 is a cross-sectional view around the platen of the printer according to the first exemplary embodiment of the present invention.

[Explanation of symbols]

 32 print head 61 paper guide 62 paper guide plate 100 platen 101 R side auxiliary plate 102 J side auxiliary plate

Claims (3)

[Claims] 1. A printer comprising a print head and a platen arranged so as to face the print head, wherein a paper guide for regulating or urging a recording paper toward the platen, and the paper guide are attached. A printer comprising: a platen movable with respect to the print head so that a gap between the print head and the print head can be changed. 2. A groove or a recess is formed on the platen at a position substantially equal to the width of the recording paper, and the paper guide is fitted in the groove or the recess so that the position of the end surface of the recording paper is fixed. The printer according to claim 1, wherein a guide portion is formed to regulate the printer. 3. The printer according to claim 1, wherein the paper guide has a tip of a biasing portion of the recording paper bent to bias the recording paper by the bent portion.