KR20070006376A - Printing apparatus being easily repaired paper jam and mini printer provided with the same - Google Patents

Abstract

A printing apparatus for easily solving a paper jam and a mini printer including the same are provided to easily remove a jammed paper by separating only a paper guide assembly without separating the entire printing unit from the body of the mini printer. A printing apparatus includes a printing head assembly(1520), paper guide members(1530,1540), a paper guide assembly(1550), a ribbon cartridge assembly(1560), a first drive motor(1580), and a second drive motor. The ribbon cartridge assembly supplies a ribbon toward the printing head assembly. The first drive motor is installed at a position of a main frame to provide a drive force driving the printing head assembly. The second drive motor is installed at a position of the main frame to provide a drive force guiding the paper.

Description

Printing apparatus being easily repaired paper jam and Mini printer provided with the same}

1 is a schematic perspective view of a mini printer according to a preferred embodiment of the present invention;

FIG. 2 is a schematic perspective view of a printing apparatus mounted on the mini printer of FIG. 1; FIG.

3 is a schematic exploded perspective view of the printing apparatus of FIG. 2;

4 is a schematic exploded perspective view of the paper guide assembly of the printing device of FIG.

5 is a schematic perspective view of a printing apparatus mounted on a mini printer of the prior art; And

6 is a schematic exploded perspective view of the printing apparatus of FIG. 5.

<Explanation of symbols for main parts of drawing>

1000: mini printer 1100: main body

1120: operation panel 1300: cover

1500: printing device 1510: mainframe

1513: paper guide foil 1520: printing head assembly

1522: head 1523: lead camshaft

1524: main guide shaft 1525: sub guide shaft

1530: lower paper guide member 1533: paper guide roller

1534: rubber roller shaft 1540: upper paper guide member

1550: Paper guide assembly 1551: Main body

1552: engaging projection 1553: cutter

1560: ribbon cartridge assembly 1561: ribbon

1570: printing head assembly cover 1571: bonding piece

1580: 1st drive motor 1590: 2nd drive motor

1700: Paper

The present invention relates to a mini printer, and more particularly, to a printing apparatus and a mini printer having the same that can be easily repaired when the paper to be printed is jammed.

A mini printer is a device used to issue a receipt in which a brand name or price is printed, and a printing device for printing a brand name or price on a sheet supplied from the outside is installed.

One example of such a printing device is shown in FIGS. 5 and 6.

As shown in Figure 5 and Figure 6, the printing device 2500 installed in the mini-printer of the prior art is the main frame 2510, printing head assembly 2520, paper guide members (2530, 2540), paper guide 2550, a ribbon cartridge assembly 2560, a print head assembly cover 2570, a first drive motor 2580, a second drive motor 2590, and the like.

The print head assembly 2520 is for printing letters on paper, and is electrically connected to a flexible substrate 2529 electrically connected to a substrate (not shown) installed on an inner bottom surface of the main frame 2510, and a lead cam shaft The linear guided reciprocating motion is performed by the driving of the 2523 by the main guide shaft 1524 and the sub guide shaft 1525.

The paper guide members 2530 and 2540 include a lower paper guide member 2530 coupled to the main frame 2510 and an upper paper guide member 2540 coupled to the lower paper guide member 2530.

The lower paper guide member 2530 is installed at the rear side of the main frame 2510 at regular intervals facing the print head assembly 2520, and the upper paper guide member 2540 is provided with the lower paper guide member 2530. It is coupled to the lower paper guide member 2530 so as to be positioned between the head assembly 2520. At this time, the lower paper guide member 2530 and the upper paper guide member 2540 are coupled to the main frame 2510 from the rear by bolts 2253 penetrating through the through holes (2532, 2542) formed in each.

The paper guides 2550 are installed on the main frame 2510 to face the paper guide members 2530 and 2540 at a predetermined interval. At this time, the paper guide 2550 is installed such that the bolt 2551 is coupled to the main frame 2510 in the downward direction.

Between the paper guide 2550 and the paper guide subsidiary 2540, the rubber roller shaft 2550 is installed on the main frame 2510 so as to be rotatable, and between the paper guide 2550 and the print head assembly 2520. In order to smoothly print letters and the like on the paper guided by the guide members 2530 and 2540, a paper guide thin plate 2513 is provided for guiding the paper while elastically adhering to the paper guide 2550.

The ribbon cartridge assembly 2560 is mounted to a ribbon frame 2514 formed on the main frame 2510. At this time, the ribbon 2561 is sandwiched between the print head assembly 2520 and the paper guide sheet 2513.

The print head assembly cover 2570 is installed on the main frame 2510 so as to be positioned above the print head assembly 2520.

The first driving motor 2580 is engaged with the first motor gear 2601, the lead cam shaft gear 2258, the first connecting gear 2583, and the ribbon feeder gear 2584, respectively, so that the lead cam shaft 2523 and the ribbon feeder ( 2563).

The second driving motor 2590 is engaged with the second motor gear (not shown), the second connecting gear (not shown), and the rubber roll shaft gear 2594 to drive the rubber roll shaft 2534.

However, in the conventional printing apparatus 2500 having the above-described configuration, the paper guide members 2530 and 2540 are coupled to the main frame 2510 by bolts 2253 at the rear side, and thus the paper guide members 2530 and 2540. If the paper jam occurs in the printer, the whole printing device (2500) must be removed from the mini-printer, and then the paper guide members (2530, 2540) must be removed to remove the jammed paper. It took a long time to process.

In addition, the paper guide 2550 is coupled to the main frame 2510 by bolts 2551, and when the paper jams between the print head assembly 2520 and the paper guides 2550, the bolts 2551 are released. Since the paper guide 2550 had to be removed to remove the jammed paper, it was not only easy to handle the paper jam, but also took a long time to deal with the paper jam.

The present invention has been made to solve the above-mentioned problems of the prior art, the object of the present invention is to combine the upper paper guide member with the main frame by using a bolt in the downward direction, the printing device is coupled to the printer in the upper paper It is to provide a printing device and a mini-printer having the same by separating the guide member to handle the paper jam easily.

Another object of the present invention is to provide a printing device that can easily separate the paper guide assembly by separating the paper guide assembly by detachably coupling the paper guide assembly to the main frame through the insertion coupling of the engaging projection and the coupling groove and a mini having the same. To provide a printer.

In order to achieve the above object of the present invention, the present invention is separated from the main frame, the print head assembly reciprocating along a plurality of axes installed in the main frame, and the print head assembly at one side of the main frame at a predetermined interval. A paper guide member for coupling and guiding the paper toward the print head assembly, a paper guide assembly inserted and coupled to the mainframe so as to be positioned between the print head assembly and the paper guide member, and for supporting paper to be printed by the print head assembly; It is installed on the other side of the main frame so that the ribbon is located between the print head assembly and the paper guide member, and a ribbon cartridge assembly for supplying the ribbon to the print head assembly, and a driving force installed at a predetermined position of the main frame to drive the print head assembly. The first drive motor for providing, and is installed at a predetermined position of the main frame It provides a printing device easy to handle the paper jam characterized in that it comprises a second drive motor for providing a driving force for guiding the paper.

The printing apparatus of the present invention may include a lower paper guide member to which the paper guide member is coupled to the main frame, and an upper paper guide member detachably coupled to the lower paper guide member by a coupling means which can be released downward in a vertical direction. have.

In addition, between the upper paper guide member and the lower paper guide member may be rotatably provided with a paper guide roller for guiding the paper for the first time and a rubber roll shaft for sending the paper guided by the paper guide roller toward the paper guide assembly.

In addition, the lower paper guide member may have a protruding gear for forcibly driving the rubber roll shaft in the forward and / or reverse direction so as to protrude outwardly on one side.

In addition, the paper guide assembly has a coupling protrusion formed on at least one side wall and the main frame has a coupling groove corresponding to the coupling protrusion on at least one side wall to insert and couple the paper guide assembly to the main frame by inserting and coupling the coupling protrusion and the coupling groove. have.

Here, the paper guide assembly includes a head support plate that is detachably coupled to the main body and the main body and detachable coupling means, the head support plate may be changed from the print head assembly by the coupling means, the main body and the head support plate The elastic member may be interposed therebetween.

In addition, the present invention provides a mini-printer having the printing device described above.

Hereinafter, a mini printer according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in detail.

As shown in FIG. 1, the mini-printer 1000 according to the preferred embodiment of the present invention includes a main body 1100 and a cover 1200.

The main body 1100 forms a paper insertion groove 1110 into which a sheet of paper 1700 is inserted in a box shape on one side of the inside, and the printing apparatus insertion groove (not shown) in which the printing apparatus 1500 is inserted and mounted adjacent thereto. Form each. Here, the paper 1700 is rotatably mounted in the paper insertion groove 1110 so as to be easily replaced after the cover 1300 is opened. Although not shown, the printing device 1500 is connected by releasable coupling means such as a bolt. It is fixedly coupled to the inside of the main body 1100.

In addition, the main body 1100 has an operation panel 1120 having a plurality of operation buttons for operating the printing apparatus 1500 on the outer wall.

The cover 1300 is pivotally coupled to a position adjacent to the paper insertion groove 1110 of the main body 1100, and the paper printed on the center portion, specifically, a position substantially corresponding to the printing device 1500, is externally attached. Paper discharge port 1310 is discharged to form.

In this configuration, the paper 1700 enters into the printing device 1500, is printed, and then discharged to the outside of the printing device 1500, and at the same time, the outside of the mini printer 1000 through the paper outlet 1310 of the cover 1300. Will be discharged.

Next, the printing apparatus 1500 mounted on the mini printer 1000 of FIG. 1 will be described in detail with reference to FIGS. 2 and 3.

The printing device 1500 includes a main frame 1510, a print head assembly 1520, a paper guide member 1530 and 1540, a paper guide assembly 1550, a ribbon cartridge assembly 1560, a print head assembly cover 1570, The first driving motor 1580 and the second driving motor 1590 are included.

The print head assembly 1520 is for printing letters on paper, and a pedestal 1521 is fixedly coupled to a lower portion thereof, and a head 1522 is installed at the front thereof.

In addition, the print head assembly 1520 is electrically connected to a flexible substrate 1529 electrically connected to a substrate (not shown) installed on an inner bottom surface of the main frame 1510 to operate according to an operation signal input from the outside.

The pedestal 1521 is slidably coupled to the lead cam shaft 1523, the main guide shaft 1524 and the sub guide shaft 1525, and the pedestal 1521 is the main guide shaft by the rotational movement of the lead cam shaft 1523. Under the guidance of the (1524) and the sub-guiding shaft (1525) is to reciprocate linear movement a certain distance. At this time, the printing head assembly 1520 fixed to the pedestal 1521 is also a reciprocating linear movement a predetermined distance.

The paper guide members 1530 and 1540 include a lower paper guide member 1530 coupled to the main frame 1510 and an upper paper guide member 1540 coupled to the lower paper guide member 1530.

The lower paper guide member 1530 is installed at the rear side of the main frame 1510 at regular intervals to face the print head assembly 1520. In this case, the coupling pin 1532 having a through hole formed by the bolt 1531 is fixedly coupled to the main frame 1510.

In addition, the lower paper guide member 1530 is equipped with a paper guide roller 1533 for guiding the paper for the first time in the area where the paper is guided on the rear side, and the paper guide roller 1533 at a predetermined distance from the front side A rubber roller shaft 1534 is forcibly rolled up. At this time, the paper guide roller 1533 is rotatably and detachably mounted in the coupling groove 1535 formed on the rear side of the lower paper guide member 1530, the rubber roller shaft 1534 is the lower paper guide member 1530. Is rotatably coupled to the coupling hole 1536 formed on the front side of the.

The upper paper guide member 1540 is coupled to the lower paper guide member 1530 so as to be positioned above the paper guide roller 1533 and the rubber roller shaft 1534. At this time, the upper paper guide member 1540 in such a way that the bolt 1541 is coupled to the coupling hole 1537 formed in the lower paper guide member 1530 through the through hole 1542 formed in the upper paper guide member 1540. Is releasably coupled to the lower paper guide member 1530. Here, since the upper paper guide member 1540 is engaged and / or released from the lower paper guide member 1530 by engaging and releasing the bolts 1541 in the vertical direction from the top to the bottom, the printing device when the paper is jammed therebetween. Even when the 1500 is coupled to the main body (1100 of FIG. 1) of the mini printer 1000 of FIG. 1, the upper paper guide member 1540 may be separated by easily releasing the bolt 1541 to easily remove the jammed paper. .

The paper guide assembly 1550 is adjacent to the upper paper guide member 1540, specifically, the rubber roller shaft 1534, and also faces the printhead assembly 1520, specifically the head 1522, to the main frame 1510. Is installed on. At this time, the paper guide assembly 1550 is the main frame in such a way that the engaging projection (1552) formed on both side walls of the main body (1551) is inserted into the rectangular coupling groove (1511) that is opened outside formed on both side walls of the main frame (1510). Is detachably coupled to 1510.

In addition, between the paper guide assembly 1550 and the print head assembly 1520, specifically, the head 1522, the paper guides the paper to smoothly print letters and the like on the paper guided by the paper guide members 1530 and 1540. A paper guide thin plate 1513 for guiding elastically in close contact with the assembly 1550 is installed.

The paper guide assembly 1550 will be described in more detail below with reference to FIG. 4.

The ribbon cartridge assembly 1560 is mounted to a ribbon frame 1514 formed on the main frame 1510. At this time, the ribbon 1561 is sandwiched between the head 1522 of the print head assembly 1520 and the paper guide sheet 1513, and both legs 1562 surround both side walls 1512 of the main frame 1510. .

In addition, the ribbon cartridge assembly 1560 is provided with a ribbon feeder operation protrusion 1564 coupled to the ribbon feeder 1563 installed on the main frame 1510 up and down to one side.

The print head assembly cover 1570 is installed on the main frame 1510 to be positioned above the print head assembly 1520. At this time, the print head assembly cover 1570 is the main frame (1570) in such a way that the pair of coupling pieces 1571 integrally formed on both sides of the cover 1570 are in close contact with the inner surfaces of both side walls 1512 of the main frame 1510. 1510 is detachably installed.

In addition, the print head assembly cover 1570 has a plurality of heat dissipation openings 1572 formed on the top thereof for dissipating heat generated while the print head assembly 1520 operates.

The first driving motor 1580 is used to drive the print head assembly 1520 by rotating the lead cam shaft 1523. The first driving motor 1580 is installed adjacent to the side wall 1512 in the main frame 1510.

In addition, the first driving motor 1580 is electrically connected to the main board (not shown) installed on the inner bottom surface of the main frame 1510 to the main body (1100 of FIG. 1) of the mini printer (1000 of FIG. 1). It is driven according to the signal transmitted by the installed operating panel (1120 of FIG. 1), the first motor gear (1581) is coupled to the motor shaft (not shown).

The first motor gear 1581 is exposed to the outside of the sidewall 1512 and is engaged with the lead cam shaft gear 1582 coupled with the lead cam shaft 1523. In addition, the lead cam gear 1582 is engaged with the ribbon feeder gear 1584 meshed with the ribbon feeder 1563 via the first connecting gear 1583.

Accordingly, the first motor gear 1581, the lead cam shaft gear 1852, the first connecting gear 1583, and the ribbon feeder gear 1584 are simultaneously obtained by the first driving motor 1580.

The second driving motor 1590 is for driving the rubber roller shaft 1534 and is installed adjacent to the lower paper guide member 1530 at the rear of the main frame 1510.

In addition, the second driving motor 1590 is electrically connected to the main board (not shown) installed on the inner bottom surface of the main frame 1510 to the main body (1100 of FIG. 1) of the mini printer (1000 of FIG. 1). It is driven according to the signal transmitted by the installed operating panel (1120 of FIG. 1), the second motor gear (not shown) is coupled to the motor shaft (not shown).

The second motor gear (not shown) is engaged with the protruding gear 1592 installed on the sidewall of the lower paper guide member 1530 so as to slightly protrude upward from the upper paper guide member 1540. In addition, the protruding gear 1592 is engaged with the rubber roller shaft gear 1594 coupled with the rubber roller shaft 1534 via the second connecting gear 1593.

Accordingly, the second motor gear (not shown), the protruding gear 1592, the second connecting gear 1593, and the rubber roller shaft gear 1594 are simultaneously obtained by the second driving motor 1590.

Here, since the protruding gear 1592 slightly protrudes above the upper sheet guide member 1540, when the sheet is jammed in the sheet guide members 1530 and 1540, the upper sheet guide member 1540 is not severely caught. By forcibly rotating only the protruding gear 1592 in the reverse direction without removing it, the rubber roller shaft 1534 can be rotated in the reverse direction to take out the paper.

Next, the paper guide assembly 1550 of the printing apparatus 1500 of FIG. 3 will be described in detail with reference to FIG. 4.

The paper guide assembly 1550 has a rectangular groove 1551a formed at one side of the main body 1551, and is inserted into an externally open rectangular coupling groove 1511 formed at both side walls of the main frame 1510 on both side walls. A pair of coupling protrusions 1552 are formed.

In the main body 1551, a cutter 1553 for easily cutting the paper printed on the upper surface thereof is detachably coupled by the bolt 1553a.

In addition, in the main body 1551, the tape cushion 1554, the thin plate 1555, the tape 1556, and the head support plate 1557 are inserted into the rectangular groove 1551a in this order.

The tape cushion 1554 absorbs the shock applied by the head 1552 when the head 1522 of the print head assembly 1520 hits the ribbon 1561 and prints letters or the like on the paper, thereby damaging the head 1522. To prevent.

The head support plate 1557 is coupled to the main body 1551, specifically, the rectangular groove 1551a by a bolt 1559, wherein the head support plate 1557 is elastically formed between the head support plate 1557 and the main body, specifically the rectangular groove 1551a, such as rubber. An elastic member 1558 made of a material is interposed.

Thus, by varying the degree of engagement of the bolt 1559 by using the elasticity of the elastic member 1558, the print head assembly 1520, specifically the head 1552 and the paper guide assembly 1550, specifically the head support plate 1557 You can change the distance between).

The operation of the printing apparatus 1500 having the above-described configuration will be described below.

The roll-shaped paper 1700 mounted on the main body 1100 of the mini-printer 1000 is initially and automatically or manually between the printing device 1500, specifically, the paper guide members 1530 and 1540, and more specifically, the paper. It is fitted to the guide roller 1533.

When the user presses a button installed on the operation panel 1120 of the main body 1100, the second driving motor 1590 is driven, and the protruding gear 1592, the second connecting gear 1593, and the rubber roll shaft gear 1536 simultaneously. Driven. At this time, the rubber roll shaft 1534 coupled to the rubber roll shaft gear 1536 rotates and pulls the paper inserted in the paper guide roller 1533 toward the head support plate 1557 of the paper guide assembly 1550.

When the paper is sent to the paper guide assembly 1550, the first driving motor 1580 is driven, and the lead cam gear 1582, the first connecting gear 1583, and the ribbon feeder gear 1584 are simultaneously driven.

When the lead cam gear 1582 is driven, the lead cam 1523 coupled to the lead cam gear 1582 is driven, and at this time, the printing head assembly 1520 connected to the lead cam 1523, specifically, the pedestal 1521 is driven. The head 1522 prints letters and the like on the paper while linearly moving along the main guide shaft 1524 and the sub guide shaft 1525.

In addition, when the ribbon feeder gear 1584 is driven, the ribbon feeder 1563 coupled to the ribbon feeder gear 1584 is driven, and the new ribbon 1561 is supplied while the used ribbon 1561 moves. do.

When printing, such as letters on the paper, is finished, the first driving motor 1510 is driven in the reverse direction, and the lead cam gear 1582 and the first connecting gear 1583 are simultaneously driven in the reverse direction. At this time, the lead cam 1523 coupled to the lead cam gear 1582 is also driven in the reverse direction, and the printing head assembly 1520 is returned to the initial position. However, when the lead cam gear 1582 is driven in the reverse direction, the first connecting gear 1583 is slightly lifted upward and separated from the ribbon feeder gear 1584, so that the ribbon feeder gear 1584 is not driven.

By repeatedly performing such a process, desired letters and the like are printed on the paper.

As mentioned above, although the mini printer of this invention was demonstrated with reference to the preferred embodiment of this invention, it is clear for those skilled in the art that correction, a change, and various deformation | transformation Example are possible within the range which does not deviate from the idea of this invention.

In the printing apparatus of the present invention, when the paper guide assembly is inserted and detachably coupled to the main frame, when the paper is jammed between the printing head assembly and the paper guide assembly, only the paper guide assembly is separated without removing the entire printing device from the main body of the mini printer. The jammed paper can be removed easily.

In addition, since the upper paper guide member is detachably coupled to the lower paper guide member vertically downward by the bolt, the paper is specifically placed between the upper paper guide member and the lower paper guide member, specifically, on the rubber roller shaft and / or the paper guide roller. When caught, it is possible to easily remove the jammed paper by separating only the upper paper guide member without removing the entire printing device from the main body of the mini printer.

In addition, since the protruding gear slightly protrudes out of the upper paper guide member, the paper guide member is caught between the upper paper guide member and the lower paper guide member, specifically, when the paper is caught on the rubber roller shaft and / or the paper guide roller. Unless severe cases, the jammed paper can be taken out by forcibly driving the protruding gear in the reverse direction without forcibly removing the upper paper guide member and forcibly driving the rubber roll shaft in the reverse direction.

Claims (9)

Mainframe; A print head assembly reciprocating along a plurality of axes installed in the main frame; A paper guide member detachably coupled to one side of the main frame at a predetermined distance from the print head assembly and for guiding paper toward the print head assembly; A paper guide assembly inserted into and coupled to the main frame so as to be positioned between the print head assembly and the paper guide member, for supporting paper printed by the print head assembly; A ribbon cartridge assembly installed on the other side of the main frame such that a ribbon is positioned between the print head assembly and the paper guide member and for supplying the ribbon to the print head assembly; A first driving motor installed at a predetermined position of the main frame to provide a driving force for driving the printing head assembly; And And a second driving motor installed at a predetermined position of the main frame to provide a driving force for guiding the paper. The paper guide member of claim 1, wherein the paper guide member includes a lower paper guide member coupled to the main frame and an upper paper guide member detachably coupled to the lower paper guide member by a release means which can be released downward in a vertical direction. Printing device, characterized in that. The rubber roll shaft according to claim 2, wherein a paper guide roller for guiding the paper for the first time and the paper guided by the paper guide roller between the upper paper guide member and the lower paper guide member toward the paper guide assembly. The printing device, characterized in that each rotatably provided. The printing apparatus according to claim 3, wherein the lower paper guide member is provided with a protruding gear for forcibly driving the rubber roll shaft in the forward and / or reverse direction so as to protrude outwardly on one side. The paper guide assembly of claim 1, wherein the paper guide assembly has a coupling protrusion formed on at least one side wall, and the main frame has a coupling groove corresponding to the coupling protrusion formed on at least one side wall to insert the coupling protrusion and the coupling groove. Printing device, characterized in that the guide assembly is inserted and coupled to the mainframe. 6. The printing apparatus according to claim 5, wherein the paper guide assembly has a variable distance from the printing head assembly. 6. The paper guide assembly of claim 5, wherein the paper guide assembly includes a main body and a head support plate detachably coupled to the main body by means of detachable coupling means, wherein the head support plate has a distance from the print head assembly by the coupling means. Printing device characterized in that the variable. The printing device according to claim 7, wherein an elastic member is interposed between the main body and the head support plate. A mini printer comprising a printing device according to any one of claims 1 to 8.

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