KR102058405B1 - Cutting apparatus for printer paper - Google Patents

Abstract

It provides a printing paper cutting device for a printer is installed in the printer to cut the printing paper is completed, the fixed cutter is fixed to the printer; A movable cutter which is installed to the reciprocating motion to the printer and moves forward and backward by a driving member, and moves toward the fixed cutter by the driving member to cut the printing paper while overlapping the fixed cutter; Movable cutter protrusions protruding from both ends of the movable cutter in the width direction to extend toward the fixed cutters, and supported by upper or lower portions of the fixed cutters; And fixed cutter protrusions protruding from both ends in the width direction of the fixed cutter to extend toward the movable cutter, and to support a bottom or an upper surface of the movable cutter protrusion.

Description

Printing Paper Cutting Device for Printers {CUTTING APPARATUS FOR PRINTER PAPER}

Embodiments disclosed herein relate to a printing paper cutting device for a printer, and more particularly, a printing paper cutting device for a printer that can prevent the movable cutter from being separated from the fixed cutter and can miniaturize the printer. It is about.

In general, a printer is a device that is connected to various electronic devices such as a computer and prints the data stored in the device on a paper of the same standard, and to a mobile communication terminal such as a smartphone, tablet PC, PDA, etc. Small printers that can be connected to print receipts, various labels or tickets have been developed and used.

As a small printer as described above, a thermal printer is representative.

Thermal printers are suitable for printing receipts and labels, since thermally sensitive thermal recording paper can be used as printing paper to print smooth characters and pictures without using toner or ink.

Here, the printing paper is rotatably installed while being accommodated in the case of the printer in the state of being wound in a roll shape, and the letters or symbols are printed by the thermal head while being drawn out by a predetermined length through rotation by the driving roller.

Then, the printing paper, which has been printed, is discharged to the outlet of the printer by the driving roller and then cut by the cutting device.

1 is a block diagram showing a cutting device according to the prior art.

Referring to Figure 1, the cutting device according to the prior art may be composed of a fixed blade (1) and a movable blade (3), such as the cutter mechanism disclosed in the Republic of Korea Patent Publication No. 1665714, the movable blade (3) It moves by the moving member to engage the fixed blade (1) and cut the printing paper (P).

Here, since the movable blade (3) slides along the upper surface of the fixed blade (1) while moving by the moving member in a state spaced apart from the fixed blade (1), both ends to guide contact with the fixed blade (1). Guide protrusions 3a are formed on the protrusions.

The guide protrusion 3a is formed to be bent upward while forming a round shape to smoothly contact the fixed blade 1.

By the way, the cutting device of the prior art as described above has a problem that the installation space corresponding to the height of the guide protrusion (3a) is required as the guide protrusion (3a) is bent upward and protrude, accordingly, the height of the printer case Has become difficult to realize miniaturization.

On the other hand, the Republic of Korea Patent Publication No. 10-1263651 discloses a structure in which the guide protrusion provided on the movable blade does not bend to extend in a straight line is always supported on the upper surface of the fixed blade.

The prior art as described above can be reduced in the height of the printer case because the guide protrusion is formed in a flat plate type, but the length of the guide protrusion should be formed long to prevent the movable blade from being separated from the fixed blade by impact, etc. Accordingly, the width of the printer case must be secured by the length of the excessively protruding guide protrusion, which causes a problem in that the printer case is complicated.

Therefore, there is a need for a technique for solving the above problems.

On the other hand, the background art described above is technical information that the inventors possess for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention. .

Embodiments disclosed in the present specification, which can prevent the movable cutter from detaching from the fixed cutter, and also to provide a printing paper cutting device for a printer capable of miniaturizing the printer by reducing the installation space of the movable cutter There is a purpose.

Specifically, the embodiments disclosed herein, the movable cutter protrusion by forming a movable cutter protrusion at both ends of the movable cutter in the width direction, and forming a fixed cutter protrusion at both ends of the fixed cutter in the width direction thereof to face each other with the movable cutter protrusion. The purpose of the present invention is to provide a printing paper cutting device for a printer that can produce a compact and simple printer case by eliminating the problem of excessively protruding the movable cutter by reducing the length.

In addition, the embodiments disclosed herein, an object of the present invention is to provide a printing paper cutting device for a printer that can be stably in close contact with the movable cutter projection and the fixed cutter projection.

In addition, the embodiments disclosed in the present specification, an object of the present invention is to provide a printing paper cutting device for a printer that can prevent the vertical flow in the width direction of the movable cutter projection to the upper surface of the fixed cutter projection.

As a technical means for achieving the above-described technical problem, according to an embodiment of the printing paper cutting device for a printer, in the printing paper cutting device for a printer to cut the printing paper is installed in the printer is completed, fixed to the printer Fixed cutter; A movable cutter which is installed to the reciprocating motion to the printer and moves forward and backward by a driving member, and moves toward the fixed cutter by the driving member to cut the printing paper while overlapping the fixed cutter; Movable cutter protrusions protruding from both ends of the movable cutter in the width direction to extend toward the fixed cutters, and supported by upper or lower portions of the fixed cutters; And fixed cutter protrusions protruding from both ends in the width direction of the fixed cutter to extend toward the movable cutter, and to support a bottom or an upper surface of the movable cutter protrusion.

As a technical means for achieving the above-described technical problem, according to an embodiment of a printing paper cutting device for a printer, the movable cutter projection and the fixed cutter projection, each formed in a flat plate shape may face each other.

As a technical means for achieving the above technical problem, according to an embodiment of a printing paper cutting device for a printer, the movable cutter projection, the inclined surface is formed on the bottom or upper surface facing the fixed cutter projection, the fixed cutter projection An inclined surface corresponding to the inclination of the fixed cutter protrusion may be formed on an upper surface or a bottom surface facing the movable cutter protrusion.

As a technical means for achieving the above-described technical problem, according to an embodiment of the printing paper cutting device for a printer, the movable cutter projection, the front end is curved to the upper portion in the vertical direction to face the fixed cutter projection through the curved surface Can be.

As a technical means for achieving the above-described technical problem, according to an embodiment of the printing paper cutting apparatus for a printer, the movable cutter projection may be formed in a width narrower than the width of the fixed cutter projection.

As a technical means for achieving the above-described technical problem, according to an embodiment of a printing paper cutting device for a printer, the cutting device, the movable cutter projection of the movable cutter projection while restraining the movable cutter projection to the fixed cutter projection It may further include a protrusion guide for reciprocating movement.

As a technical means for achieving the above technical problem, according to an embodiment of the printing paper cutting apparatus for a printer, the projection guide is formed in a groove shape along the longitudinal direction of the fixed cutter projection to move the movable cutter projection A guide rail which prevents the flow in the width direction of the movable cutter protrusion while accommodating it; And a slider protruding in a longitudinal direction on a bottom surface of the movable cutter protrusion to be movable in the guide rail.

As a technical means for achieving the above-described technical problem, according to an embodiment of a printing paper cutting device for a printer, the slider is formed in a trapezoidal cross-section cross-section narrower than the width of the upper surface, the guide rail is And a groove having a cross section corresponding to the slider to receive the slider movably.

As a technical means for achieving the above-described technical problem, according to an embodiment of the printing paper cutting device for a printer, in the printing paper cutting device for a printer to cut the printing paper is installed in the printer is completed, fixed to the printer Fixed cutter; Reciprocating motion is installed in the printer and moved forward and backward by a driving member, and the printing member is cut by overlapping with the fixed cutter by moving toward the fixed cutter by the driving member, one end of the other end of the width direction A movable cutter protruding toward the fixed cutter to form an inclined blade; And a fixed cutter protrusion protruding to a side corresponding to the protruding portion of the inclined blade of the movable cutter among the width direction both ends of the fixed cutter to support the bottom or the upper surface of the movable cutter.

According to any one of the above-described problem solving means, as the movable cutter protrusion protruding from the width direction both ends of the movable cutter is supported on the upper surface of the fixed cutter protrusion protruding from the width direction both ends of the fixed cutter, the length of the fixed cutter protrusion is known. Compared with the present invention, it is possible to implement a significantly shorter length. Accordingly, a printing paper cutting device for a printer capable of miniaturizing a printer case can be proposed.

In addition, according to any one of the above-described solutions, it is possible to present a printing paper cutting device for a printer that can be miniaturized by the height of the printer case by the movable cutter projection and the fixed cutter projection is formed in a flat plate respectively.

In addition, according to any one of the above-mentioned means, by facing each other through the inclined surface formed on one surface of the movable cutter projection and the fixed cutter projection, the movable cutter projection can be more stably seated on the fixed cutter projection, When moving to face the printing paper while moving obliquely through the inclined surface of the movable cutter projection and the fixed cutter projection can present a printing paper cutting device for a printer that can be cut smoothly printing paper.

Further, according to any one of the above-mentioned solutions, since the movable cutter protrusion is supported on the upper surface of the fixed cutter protrusion with a width smaller than the width of the fixed cutter protrusion, the movable cutter protrusion is separated from the fixed cutter by external impact. It is possible to provide a printing paper cutting device for a printer that can be prevented.

Further, according to any one of the above-described solutions, the width of the movable cutter protrusion as the guide rail constituting the protrusion guide is formed along the longitudinal direction of the fixed cutter protrusion to move the slider formed on the bottom of the movable cutter protrusion. Since the directional flow is prevented, it is possible to provide a printing paper cutting device for a printer that can accurately cut the printing paper while the movable cutter moves without lateral flow.

In addition, according to any one of the above-described solutions, the width of the movable cutter projection in the width direction because the wing holders formed in the longitudinal direction on each side of the slider to accommodate the flow preventing wings protruding on both sides of the movable cutter projection In addition, it is possible to provide a printing paper cutting device for a printer which can prevent the flow in the vertical direction.

In addition, according to any one of the above-described solutions, in the case of forming the slider and guide rail in the shape of a trapezoid having a wider width of the bottom than the width of the upper surface, the flow direction and the vertical flow of the movable cutter protrusion through a simple structure It is possible to present a printing paper cutting device for a printer which can be prevented.

The effects obtainable in the disclosed embodiments are not limited to the effects mentioned above, and other effects not mentioned above are apparent to those skilled in the art to which the embodiments disclosed from the following description belong. Can be understood.

1 is a perspective view showing a printing paper cutting device according to the prior art.
2 is a perspective view illustrating a printer to which a printing paper cutting device is applied according to an embodiment.
3 is a longitudinal sectional view showing a printer to which a printing paper cutting device is applied according to an embodiment.
Figure 4 is a perspective view showing an extract of the printing paper cutting device of FIG.
5 and 6 are perspective views showing the fixed cutter and the movable cutter shown in FIG.
7 is a partial perspective view showing another embodiment of the movable cutter projection and the fixed cutter projection.
8 to 13 are partial perspective views showing still another embodiment of the movable cutter projection and the fixed cutter projection.
14 is a perspective view showing another embodiment of the movable cutter.

Hereinafter, various embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below may be embodied in various different forms. In order to more clearly describe the features of the embodiments, detailed descriptions of the matters well known to those skilled in the art to which the following embodiments belong are omitted. In the drawings, parts irrelevant to the description of the embodiments are omitted, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a configuration is "connected" to another configuration, this includes not only 'directly connected' but also 'connected' between different configurations. In addition, when a configuration "includes" a certain configuration, this means that, unless specifically stated otherwise, it may further include other configurations other than the other configuration.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

2 is a perspective view illustrating a printer to which a printing paper cutting device is applied, FIG. 3 is a longitudinal cross-sectional view of a printer to which a printing paper cutting device is applied, and FIG. 4 is a cut of the printing paper of FIG. 3. 5 and 6 are perspective views illustrating the fixed cutter and the movable cutter shown in FIG. 4.

The printing paper cutting apparatus 10 for a printer according to an embodiment is an apparatus for cutting the printing paper discharged to the discharge port 20a by being installed in the printer 20 as shown in FIGS. 2 and 3.

The printing paper cutting apparatus 10 for a printer according to an embodiment may be installed in a small printer having a cube shape as shown in FIG. 1, but is not limited thereto. The printing paper cutting apparatus 10 may be applied to all printers continuously discharging printing paper. have.

Here, looking at the configuration of the printer 20 can be configured to include the main body 21 and the cover 22 as the main configuration.

The main body 21 is formed in a substantially open housing type, and a paper conveying unit for transferring printing paper, a printing unit and a printing paper cutting device 10 are installed, and a control unit for operating them may be installed. .

In addition, the inside of the main body 21 may be rotatably installed while the printing paper in the form of a roll, the leading end of the printing paper in the direction in which the printing paper can be drawn out.

Such printing paper is composed of, for example, thermal paper that reacts to heat, and can be printed in a thermal recording method by a thermal head.

Here, the printing paper may be composed of a label paper coated with a pressure-sensitive adhesive on one surface, may be a paper provided with a separate release paper.

The cover 22 may form the outlet 20a of the printing paper between the main body 21 and the main body 21 to openly shield the main body 21 as shown in FIGS. 2 and 3.

The paper transfer unit prints information on one surface of the printing paper while transferring the printing paper, and a conventional configuration may be applied to draw out the printing paper on which the printing is completed to the outlet 20a of the printer 20.

The printing unit is a component that prints information such as letters, symbols, or figures on one side of the printing paper. For example, the printing unit may include a thermal head that converts electrical energy into thermal energy. All configurations known in the art to which the present invention pertains may be applied.

Referring to FIG. 3, the printing paper cutting apparatus 10 for a printer according to an embodiment includes a fixed cutter 100, a movable cutter 200, a movable cutter protrusion 300, and a fixed cutter protrusion 400. Can be.

The fixed cutter 100 is fixed to the main body 21 of the above-described printer 20 to cut the printing paper, the movable cutter 200 is capable of reciprocating the cover 22 on the opposite side of the fixed cutter 100 It is installed to cut the printing paper while overlapping with the fixed cutter (100).

Here, the movable cutter 200 is moved back and forth by the driving member (not shown) in a state capable of being mounted in the cutting housing 200a installed in the cover 22 as shown in FIG. The paper can be cut together with the paper.

In this case, the movable cutter 200 may move toward the fixed cutter 100 so that the bottom surface of the movable cutter 200 overlaps the upper surface of the fixed cutter 100 to cut the printing paper. In this case, the movable cutter 200 is installed in the cover 22, the embodiment overlapping the upper surface of the fixed cutter 100 fixed to the main body 21, but the movable cutter 200 is different from Located below the fixed cutter 100 may be implemented to overlap the bottom of the fixed cutter (100). For example, if the movable cutter 200 is installed in the main body 21 and the fixed cutter 100 is installed in the cover 22, the movable cutter 200 overlaps the bottom surface of the fixed cutter 100 and prints the paper. You can also cut.

That is, the movable cutter 200 may be configured in a guillotine manner in which the fixed cutter 100 is separated from each other and cuts the printing paper while moving toward the fixed cutter 200.

Here, the driving member for reciprocating the movable cutter 200 may be configured in a variety of ways, any configuration that satisfies any configuration if the movable cutter 200 can be moved forward and backward in the direction of the fixed cutter (100).

The movable cutter 200 may include a pair of inclined blades 210 and a cutting control blade 220 which are symmetrical in a shape of 'V'.

That is, the pair of inclined blades 210 are formed while making the inclined to settle toward the center at the outer sides of the movable cutter 200 in the width direction, thereby cutting the printing paper from the outer sides in the width direction toward the center.

The cutting control blade 220 is a component for remaining the center of the printing paper in an uncut state, and is formed in a groove shape at the center of the pair of inclined blades 210.

That is, the cutting control blade 220 may leave the center of the printing paper in an uncut state by cutting the cut surfaces of the pair of inclined blades 210.

The cutting control blade 220 cuts the entirety of the printing paper together with the inclined blade 210 when the advance distance of the movable cutter 200 is extended by the length of the groove, and the advance distance of the movable cutter 200 is the groove. If the length is set shorter than the length, the center portion of the printing paper in the width direction may not be cut so that portions of the label may be connected to each other.

The movable cutter protrusion 300 protrudes from both ends in the width direction of the movable cutter 200 to extend toward the fixed cutter 100, and may be supported in a state overlapped with an upper surface of the fixed cutter protrusion 400 to be described later.

The fixed cutter protrusion 400 protrudes from both ends in the width direction of the fixed cutter 100 so as to extend toward the movable cutter 200, and may be installed to overlap the bottom surface of the movable cutter protrusion 300.

That is, the movable cutter protrusion 300 overlaps the upper surface of the fixed cutter protrusion 400 when the movable cutter 200 does not cut the printing paper so that the movable cutter protrusion 200 is supported by the fixed cutter 100. It can prevent the departure from, and can be supported by the fixed cutter projection 400 without extending to the fixed cutter 100 can perform the separation prevention function of the movable cutter 200 even with a shorter length than the conventional. .

Therefore, the cover 22 portion in which the movable cutter 200 is installed or the portion of the main body 21 facing the movable cutter 200 can be simply manufactured in a straight line, and the cover 22 or the main body 21 is built in. The installation space of the peripheral parts can be secured.

The movable cutter protrusion 300 and the fixed cutter protrusion 400 may be formed in a flat plate shape as shown in FIG. Accordingly, since the movable cutter protrusion 300 is formed to have a flat plate shape without being protruded upward, the height of the printer 20 can be reduced.

Meanwhile, the movable cutter protrusion 300 and the fixed cutter protrusion 400 may face each other through the inclined surface, respectively, as shown in FIG. 7.

That is, the inclined surface is formed on the bottom of the movable cutter protrusion 300, and the inclined surface is formed on the upper surface of the fixed cutter protrusion 400 to be in close contact with each other. In this case, it may be in close contact with each other through the inclined surface more stably. Especially, when the movable cutter 200 moves, the movable cutter 200 moves obliquely along the inclined surface to face the printing paper and then moves horizontally. Since the printing paper can be smoothly cut can be expected.

Here, the movable cutter protrusion 300 and the fixed cutter protrusion 400 may be formed in a flat plate or inclined shape, the width of the movable cutter protrusion 300 is narrower than the width of the fixed cutter protrusion 400, In this case, even when an external shock is applied to the movable cutter 200, the movable cutter protrusion 300 may maintain the seated state on the fixed cutter protrusion 400.

Meanwhile, referring to FIG. 13, the movable cutter protrusion 300 may be formed such that the tip portion thereof is curved upward in the vertical direction, and may face the fixed cutter protrusion 400 through the curved surface.

In addition, the printing paper cutting apparatus 10 for a printer according to an embodiment may further include a configuration of the protrusion guide 500 as shown in FIGS. 8 to 12.

The protrusion guide 500 is a component that guides the movement of the movable cutter protrusion 300 in a state in which flow is prevented while restraining the movable cutter protrusion 300 to the fixed cutter protrusion 400 in a movable state.

For example, the protrusion guide 500 may include a guide rail 510 and a slider 520 as shown in FIG. 8.

The guide rail 510 may extend in the longitudinal direction of the fixed cutter 100 while being formed in a groove shape along the longitudinal direction on the upper surface of the fixed cutter protrusion 400.

Slider 520 is protruded along the longitudinal direction on the bottom of the movable cutter protrusion 300 is accommodated to be moved to the guide rail 510, and moves while moving along the guide rail 510 when the movable cutter 200 is moved. It is possible to suppress the cutter 200 from flowing in the width direction.

That is, since the movable cutter 200 linearly moves in the state of being fitted to the guide rail 510 through the slider 520, the left and right flows in the width direction can be prevented.

Here, the guide rail 510 may be formed to be wider than the width of the slider 520. In this case, the movable cutter protrusion 300 may be lowered from the upper portion of the fixed cutter protrusion 400 and seated on the guide rail 510 to be more easily positioned through the slider 520.

Meanwhile, the protrusion guide 500 may further include a flow preventing wing 530 and a wing holder 540 as shown in FIG. 9.

The flow preventing wing 530 protrudes in the longitudinal direction on both sides of the slider 520, and the wing holder 540 is formed in the groove along the length direction on both sides of the guide rail 510 to prevent the flow preventing wing 530. The slider 520 is suppressed from flowing in the vertical direction while being movably received.

That is, as the movable cutter protrusion 300 is coupled to the guide rail 510 through the slider 520, the flow preventing blade 530 is coupled to the wing holder 540, so that the flow direction of the movable cutter protrusion 300 is guided by the guide rail 510. In addition to being prevented, vertical flow through the wing holder 540 may be prevented.

Here, the wing holder 540 and the flow preventing wing 530 may be formed in the same square cross-section as shown in FIG.

Alternatively, the wing holder 540 and the flow preventing wing 530 may be formed in a semi-circular cross section while the wing holder 540 is formed in a rectangular cross section as shown in FIG. 10. . In this case, the flow preventing blade 530 may be inserted into the wing holder 540 and slide smoothly without the occurrence of a jam.

Meanwhile, as illustrated in FIG. 11, the slider 520 and the guide rail 510 may be movably coupled to each other while being formed in a trapezoidal cross section having a wider width at a lower surface than a width of an upper surface.

That is, the slider 520 may be prevented from flowing in the vertical direction of the guide rail 510 as the bottom surface is formed in a wider structure, and the movable cutter 200 may have a straight reciprocating motion while preventing the flow in the width direction. ) Can guide the movement.

That is, the slider 520 may be prevented from flowing in the vertical direction of the guide rail 510 as the bottom surface is formed in a wider structure, and the movable cutter 200 may have a straight reciprocating motion while preventing the flow in the width direction. ) Can guide the movement.

Alternatively, the slider 520 and the guide rail 510 may be coupled to each other while being formed in a trapezoidal cross-section having a narrower width than the width of the upper surface as shown in FIG. 12. In this case, as the movable cutter protrusion 300 descends from the upper portion of the fixed cutter protrusion 400 and is seated on the guide rail 510, the movable cutter protrusion 300 may be more easily positioned through the slider 520.

On the other hand, Figure 14 is a perspective view showing another embodiment of the above-described movable cutter 200.

The printing paper cutting apparatus 10 according to an embodiment may be applied to the movable cutter 200 of the type in which the inclined blade 250 in one direction is formed.

That is, the movable cutter 200 may be configured of one inclined blade 250 protruding in the fixed cutter 100 direction from one end of the width direction both ends than the other end.

In this case, the above-described configuration of the movable cutter protrusion 300 may be omitted in the movable cutter 200, and the fixed cutter protrusion 400 may be provided only in the fixed cutter 100.

Specifically, the fixed cutter protrusion 400 is protruded only on the side corresponding to the protruding portion of the one-way inclined blade 250 of the movable cutter 200 of the width direction both ends of the fixed cutter 100 to the bottom surface of the movable cutter 200. I can support it.

The operation and action of the printing paper cutting device 10 for another printer in one embodiment including the above components will be described.

When the printing paper is not cut, the movable cutter 200 waits while being supported on the upper surface of the fixed cutter protrusion 400 through the movable cutter protrusion 300.

The printing unit embedded in the printer 20 prints the information set on the printing paper, and the paper transfer unit transfers the printing paper on which printing is completed and discharges it to the discharge port 20a.

When cutting the discharged printing paper, the driving member moves the movable cutter 200 toward the fixed cutter 100 through the control of the control unit, and the movable cutter 200 overlaps the upper surface of the fixed cutter 100. After cutting the printing paper together with the fixed cutter 100 through the inclined blade 210, it returns to the original position again.

As described above, in the printing paper cutting apparatus 10 for a printer according to an embodiment, the movable cutter protrusion 300 protruding from the width direction both ends of the movable cutter 200 protrudes from the width direction both ends of the fixed cutter 100. As it is supported on the upper surface of the fixed cutter protrusion 400, the length of the fixed cutter protrusion 400 can be implemented to be significantly shorter than before, and thus, the printer case 20 can be miniaturized.

The above-described embodiments are for illustrative purposes, and those of ordinary skill in the art to which the above-described embodiments belong may easily change to other specific forms without changing the technical spirit or essential features of the above-described embodiments. I can understand. Therefore, it is to be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected by the present specification is represented by the following claims rather than the above description, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and their equivalents. .

10: printing paper cutting device for printer
20: printer
21: main body
22: cover
20a: outlet
100: fixed cutter
200: movable cutter
210: bevel blade
220: control blade
300: movable cutter protrusion
400: fixed cutter protrusion
500: projection guide
510: guide rail
520: slider
530: floating prevention wing
540: wing holder

Claims (9)

In the printing paper cutting apparatus for a printer which is installed in the printer to cut the printing paper is completed,
A fixed cutter fixed to the printer;
A movable cutter which is installed to the reciprocating motion to the printer and moves forward and backward by a driving member, and moves toward the fixed cutter by the driving member to cut the printing paper while overlapping the fixed cutter;
Movable cutter protrusions protruding from both ends in the width direction of the movable cutter to extend toward the fixed cutter, and supported by a portion of an upper surface or a bottom surface of the fixed cutter; And
A fixed cutter protrusion protruding from both ends of the fixed cutter in the width direction to extend toward the movable cutter, and supporting a bottom or an upper surface of the movable cutter protrusion;
The movable cutter projection,
Printing paper cutting device for a printer is formed in a width narrower than the width of the fixed cutter projection. The method of claim 1,
And the movable cutter protrusion and the fixed cutter protrusion are each formed in a flat plate shape to face each other. The method of claim 1,
The movable cutter protrusion, the inclined surface is formed on the bottom or upper surface facing the fixed cutter protrusion,
The fixed cutter projection is a printing paper cutting device for a printer, the inclined surface corresponding to the inclination of the fixed cutter projection is formed on the top or bottom facing the movable cutter projection. The method of claim 1,
The movable cutter projection,
A printing paper cutting device for a printer, in which a tip portion is curved upward in a vertical direction to face the fixed cutter protrusion through a curved surface. delete The method of claim 2 or 3,
The cutting device,
And a projection guide guiding the reciprocating movement of the movable cutter projection while restraining the movable cutter projection to the fixed cutter projection. The method of claim 6,
The protrusion guide,
A guide rail formed on the upper surface of the fixed cutter protrusion along the longitudinal direction to prevent the flow of the movable cutter protrusion in the width direction while receiving the movable cutter protrusion to be movable; And
And a slider formed protruding in the longitudinal direction on the bottom surface of the movable cutter protrusion to be movable in the guide rail. The method of claim 7, wherein
The slider is formed in a trapezoidal cross section, the width of which is narrower than the width of the upper surface,
The guide rail is a printing paper cutting device for a printer formed in the groove of the cross section corresponding to the slider to accommodate the slider to move. delete

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