KR20230157166A - Device for cutting printing paper for printer - Google Patents

Abstract

The present invention relates to a printing paper cutting device for a printer whose structure has been improved to enable simpler construction and smoother operation.
The present invention includes a movable blade installed on the main body to be capable of being raised and lowered; a fixed blade paired with the movable blade and fixed to the cover for cutting printing paper; A cover member that covers the movable blade from the outside, wherein the cover member directly contacts the movable blade and connects to ground during a cutting process caused by relative movement of the movable blade and the fixed blade on the back of the movable blade. a pusher that applies cutting pressure to the movable blade; a gear cover part formed integrally with the pusher and covering a gear part that drives the movable blade; It provides a printing paper cutting device for a printer including a dust cover portion formed on an upper end of the pusher to block dust from entering the printer.

Description

Printing paper cutting device for printer {DEVICE FOR CUTTING PRINTING PAPER FOR PRINTER}

The present invention relates to a printing paper cutting device for a printer, and more specifically, to a printing paper cutting device for a printer whose structure has been improved to enable simpler construction and smoother operation.

In general, thermal printers (or direct thermal printers) are mainly used as point-of-sale (POS) printers, and these thermal printers include a device that transfers paper to the printing area and a cutting device that cuts the printed paper. It is equipped with

At this time, most conventional thermal printers are equipped with a power source (for example, a motor) for transporting the printing paper and a power source for cutting the printing paper, so that the work of cutting the printed part after printing is made on the printing paper is performed using a separate power source. (i.e., it was usually done individually by being driven by a motor).

For example, Registered Patent Publication No. 2009-131630 (published on December 29, 2009), Registered Patent Publication No. 1246082 (announced on March 21, 2013), Registered Patent Publication No. 1263651 (published on May 21, 2013) and registered patents. A printer equipped with a paper cutting device disclosed in Publication No. 1297646 (announced on August 19, 2013) discloses an embodiment in which two power motors are used to transfer printing paper and cut the printing paper.

In this way, when the printing paper transfer operation and the printing paper cutting operation are implemented using two motors, not only does the device become larger due to an increase in the number of parts, but also components such as circuits and gear trains for driving individual motors are required. There was a high risk that it would become relatively complex, and in particular, it had the disadvantage of acting as a limiting factor in realizing miniaturization and simplification of products.

Accordingly, a method of implementing the printing paper transfer operation and the printing paper cutting operation using a single motor in the above printer has been researched and developed.

That is, Utility Model Registration No. 0083282 (published on June 15, 1994), Japanese Patent Application Laid-Open No. 2001-1590 (published on January 9, 2001), and Japanese Patent Publication No. 3496713 (published on November 28, 2003). , Registered Patent Publication No. 0517839 (announced on October 4, 2005) discloses a technology for implementing printing paper transfer and printing paper cutting operations using a single motor in facsimile machines and printers.

And, as a prior document related to the present invention described later, the power conversion device of the printer of Patent No. 10-1618599 (registered on April 29, 2016) is shown in FIGS. 1 to 4.

The printer in FIGS. 1 to 4 is a thermal printer, and is centered around a main casing 100 on which a printer head unit 300 for printing is mounted, and a rotating portion 103 provided on the rear upper surface of the main casing 100. It consists of a cover frame (200) that is opened and closed by rotation and is equipped with a platen roller unit (400) that is disposed opposite to the printer head unit (300).

And, inside the main body casing 100, a placement unit 120 for placing printing paper P is installed, and a printer head unit 300 is located on the front side of this placement unit 120. It is installed.

In addition, a printing paper outlet 130 is provided on the upper outer peripheral surface where the front cover 110 and the tip of the cover frame 200 contact, so that printing is performed from the inside of the main body casing 100 using the printing paper outlet 130. The paper is pulled out.

And when the cover frame 200 is closed on the upper surface of the main body casing 100, the printer head unit 300 and the platen roller unit 400 are combined to face each other, and the platen roller unit 400 is used for printing. In order to feed paper, the platen roller 410 made of an elastic material such as rubber is rotatably supported, and the fixed blade 323, which constitutes the printing paper cutting device 320, is arranged vertically.

A platen gear 342 is fixed to one end of the platen roller 410 while connected to the shaft, and the platen gear 342 is engaged with the transfer gear train 340 to transmit rotational force.

The printer head unit 300 includes a support frame 310 on which a printing paper cutting device 320 is disposed and a thermal printer head (not shown) that records on the drawn printing paper is mounted, and a printing paper cutting device ( A movable blade 321 that slides relative to the fixed blade 323 constituting the 320), a cutting gear train 330 that drives the movable blade 321, and driving the platen roller 410. It is equipped with a gear train 340 for transport.

Gear trains consisting of a cutting gear train 330 and a conveying gear train 340 are organically mounted on the side and central portions of the support frame 310, and a cutting gear train 330 is installed on one inner side of the support frame 310. It is equipped with a printing paper cutting device 320 consisting of a movable blade 321 and a fixed blade 323 interlockably arranged, and is selectively connected to the cutting gear train 330 and the conveying gear train 340. It is equipped with a single power motor 360 that can provide driving force.

In the drawing, 350 represents a power conversion unit, and the power conversion unit 350 includes a sun gear 351 engaged with the drive gear 361 of the power motor 360, and a sun gear 351 centered on the sun gear 351. It consists of a planetary gear (352) connected to the rotating link (353) and meshed with the sun gear (351).

In addition, the printing paper cutting device 320 consists of a movable blade 321 and a fixed blade 323, and operates by receiving the driving force of the power motor 360 through the cutting gear train 330.

The movable blade 321 is a plate-shaped blade that is approximately V-shaped when viewed from the top, with the length from the rear end to the tip of the blade gradually shortening from both ends toward the center.

That is, the movable blade 321 is a component of the printing paper cutting device 320 and functions as a cutter in cooperation with the fixed blade 323, and operates the operating guide 322 inside the support frame 310. It is equipped with the ability to slide up and down.

The fixed blade 323 is a blade that functions to cut the printing paper by intersecting with the movable blade 321. As shown in FIGS. 1 and 2, the fixed blade 323 is a plate-shaped blade extending in the width direction of the printing paper. When the cover frame 200 is closed, it is vertically supported and fixed on the front of the platen roller unit 400 so that the blade end faces the delivered printing paper.

Therefore, when sequential power is transmitted by the cutting gear train 330, the movable blade 321 that slides up and down is fixed to the fixed blade 323 vertically supported on the front of the platen roller unit 400. As they intersect, the printing paper is cut.

However, the conventional printer shown in FIGS. 1 to 4 includes a separate foreign matter blocking member 325 to prevent foreign matter, such as dust, from flowing into and around the movable blade 321. had to be installed.

In order to guide the operation of the movable blade 321, an operation guide 322 disposed inside the movable blade 321 and a bushing plate 324 disposed outside the movable blade 321 are configured.

Additionally, a conventional printer must be equipped with a pusher to push the movable blade 321 and a pressure spring to press the movable blade 321.

Accordingly, the conventional printer had a problem in that the configuration of the printing paper cutting device 320 became complicated.

In addition, since there is no separate structure to cover and protect the cover member that covers the gears of the transfer gear train 340 and the power conversion unit 350, foreign substances may flow into the gears and interfere with operation. There was a possible problem.

1. Utility model registration No. 0083282 (announced on June 15, 1994, name: Facsimile recording paper cutting device) 2. Japanese Patent Laid-Open No. 2001-1590 (published on January 9, 2001, name: printer) 3. Japanese Patent Publication No. 3496713 (registered on November 28, 2003, name: Printing device) 4. Registered Patent Publication No. 0517839 (announced on October 4, 2005, name: printer unit and printing device including the same)

The present invention was created to solve the above problems, and its purpose is to provide a printing paper cutting device for a printer that has a simpler configuration and can operate more smoothly.

The printing paper cutting device for a printer of the present invention to achieve the above purpose,

A movable blade installed on the main body to be able to go up and down;

a fixed blade paired with the movable blade and fixed to the cover for cutting printing paper;

Including a cover member that covers the movable blade from the outside,

The cover member is,

a pusher on the back of the movable blade that directly contacts the movable blade during a cutting process due to relative movement of the movable blade and the fixed blade, is connected to ground, and applies a cutting pressure to the movable blade;

a gear cover part formed integrally with the pusher and covering the gear part that drives the movable blade;

It is characterized in that it includes a dust cover part formed on the upper part of the pusher to block dust from entering the printer.

In the present invention, a connecting portion for integrally connecting the gear cover portion is formed on one side of the pusher, a thinning portion is formed between the pusher and the connecting portion, and the cover member is fixed to the main body portion on an upper portion of the connecting portion. A fixing part for this purpose is formed, and a detachment part bent upward is formed at the front end of the fixing part to remove the fixing part from the main body.

In the present invention, cutting portions are formed in the dust cover portion at regular intervals.

In the present invention, a plurality of fastening holes are formed in the gear cover portion through which the end of each gear shaft is inserted or fastened to one side of the main body portion through a fastening member.

According to an embodiment of the present invention, by providing a cover member that covers the movable blade from the rear and elastically covers the movable blade to enable guidance when operating the movable blade, members such as existing bush plates can be eliminated, and the movable blade or The configuration of the guide member can be made simpler.

In addition, the gear cover part, which can cover and protect the multiple gears of the gear part, can be molded integrally with the cover member, making it possible to reduce the assembly efficiency and cost of the printing paper cutting device.

Therefore, the present invention has a simpler configuration and can operate more smoothly than the existing one.

Figure 1 is a perspective view showing the overall configuration of a printer according to the prior art.
Figure 2 is a perspective view showing a state in which the main body and the platen roller unit are engaged with each other in the printer of Figure 1 with the main body casing and cover frame removed.
Figure 3 is a perspective view showing the configuration of the main body of the printer of Figure 1.
Figure 4 is a perspective view of the main part showing the configuration of the cutting gear and the conveying gear in the printer of Figure 1.
Figure 5 is a perspective view showing the overall exterior configuration of a printer to which a printing paper cutting device for a printer according to the present invention is applied.
Figure 6 is a rear perspective view of Figure 1.
Figure 7 is a perspective view showing the external configuration of the main body and the cover portion equipped with a printing paper cutting device for a printer according to the present invention.
Fig. 8 is an exploded perspective view of the main part of Fig. 7;
Figure 9 is a detailed perspective view of the cover member of Figure 8.
Figure 10 is a detailed rear perspective view of Figure 8.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

Figure 5 shows a perspective view showing the overall exterior configuration of a printer to which the printing paper cutting device for a printer according to the present invention is applied.

And Figure 6 shows a rear perspective view of Figure 1.

In addition, Figure 7 shows a perspective view showing the external configuration of the main body and the cover part equipped with the printing paper cutting device for a printer according to the present invention.

And Figure 8 shows an exploded perspective view of the main part of Figure 7.

Additionally, FIG. 9 shows a detailed perspective view of the cover member of FIG. 8, and FIG. 10 shows a detailed rear perspective view of FIG. 8.

Prior to the description, the general configuration and operation of the printer will be referred to the above-described FIGS. 1 to 4, and here, only the characteristic configuration and operation of the printing paper cutting device for a printer according to the present invention will be described.

First, referring to FIGS. 5 and 6, the printer 1 to which the printing paper cutting device 1a for a printer according to the present invention is applied is a thermal printer, and the printing paper is pulled out while placed in the form of roll paper (R). This is a printer that, after printing on (P), cuts the printing paper (P) appropriately and uses it as a ticket, receipt, etc.

To explain this in detail, the printer 1 is equipped with a side frame 2 and an upper frame 3 that covers the upper part of the side frame 2, and the frames 2 and 3 are provided for printing. It consists of a main body portion 10a and a cover portion 30a.

Additionally, within the frames 2 and 3, printing paper P is wound and pulled out in the form of roll paper R and is provided to be cut by a printing paper cutting device 1a.

And referring to FIGS. 7 to 10, the printing paper cutting device 1a includes a movable blade 40 installed to be able to be raised and lowered on the main body 10a, and forms a pair with the movable blade 40 to cut the printing paper. A fixed blade 30 fixed to the cover portion 30a to cut (P), a cover member 20 that covers the movable blade 40 from the outside, and a device that guides the movable blade 40 to be raised and lowered. It is configured to include a guide member (50).

This is explained in detail.

First, the cover member 20 is movable so that a cutting pressure is applied to the movable blade 40 during the cutting process due to the relative movement of the movable blade 40 and the fixed blade 30 on the back of the movable blade 40. A pusher (21) that directly contacts the blade (40) and connects it to the ground, a gear cover part (28) formed integrally with the pusher (21) and covering the gear part (60) on one side, and the pusher (21) It is formed at the upper end of the printer 1 and includes a dust cover portion 22 that prevents foreign substances such as dust from entering the printer 1.

And it consists of a side cover portion 26 that is formed integrally with the pusher 21 and covers the side portion 35 of the main body portion 10a.

In addition, connection parts 25 are formed on the left and right sides of the pusher 21 to integrally connect the gear cover part 28 and the side cover part 26.

The dust cover portion 22 protrudes in the opposite direction where the movable blade 40 is disposed, and cutting portions 22a are formed at regular intervals on the dust cover portion 22.

By forming the cutting portion 22a in the dust cover portion 22 in this way, the bending formability of the dust cover portion 22 improves and the elastic force of the pusher 21 also increases.

Additionally, a slimming portion 24 is formed between the pusher 21 and the connecting portion 25 to increase the elastic force of the pusher 21.

Due to the formation of this weight reduction portion 24, the pusher 21 may be formed in the form of a movable blade 40. That is, the shape of the weight reduction portion 24 is formed by cutting the pusher 21 to have the same shape as the movable blade 40.

In addition, an elasticity increasing hole 23 is formed in the center of the pusher 21 to increase the elastic force of the pusher 21, especially at the center.

The elasticity increasing hole 23 can increase the elastic force of the pusher 21, and is not limited to a specific shape or shape as long as it does not interfere with the operation of the pusher 21.

The elasticity of the pusher 21 can be improved by the weight reduction portion 24 and the elasticity increasing hole 23, and also the heat generated inside the printer 1, such as the motor 63, can be removed from the printer. It can also function as a heat sink discharging heat to the outside of (1).

In addition, due to the formation of the flesh reduction portion 24 and the elasticity increasing hole 23, the contact between the pusher 21 and the movable blade 40 can be reduced as much as possible, thereby making the lifting and lowering operation of the movable blade 40 more smooth. You can.

And a fixing part 27 is formed on the upper part of the connecting part 25 for fixing the cover member 20 to the main body part 10a.

That is, a protrusion 12 is formed on each of the left and right upper parts 11 of the main body 10a, and a fixing part is inserted into the protrusion 12 to fix the cover member 20 to the main body 10a. 27), each fixing hole 27a is formed.

In addition, a removal part 27b is formed at the front end of the fixing part 27 to be bent upward so that the fixing part 27 can be easily removed from the main body 10a.

In addition, as shown in FIG. 10, the gear cover part 28 is provided so that the end of each gear shaft of each gear part 60 is inserted or fastened to one side of the main body part 10a through a fastening member such as a screw. A plurality of fastening holes 28a and 28b are formed.

Therefore, by forming the gear cover part 28, the gears of the gear part 60 can be protected from foreign substances or interference with operation, and in particular, by being formed integrally with the cover member 20 rather than being manufactured as a separate member. , the overall configuration of the printer 1 can be simplified, and it greatly contributes to cost reduction as well as improved assembly.

In addition, the side cover part 26 also has a plurality of fixing holes 26a that are inserted into the protrusions (not shown) protruding from the other side of the main body part 10a and allow the side cover part 26 to be fixed to the other side. do.

This cover member 20 is made of a thin plate spring (i.e., leaf spring), such as stainless steel (e.g., SUS304), to enhance elasticity.

In other words, the cover member 20 is manufactured by press forming a thin stainless steel plate.

Therefore, the configuration and operation of the cover member 20 allows the existing bushing plate (see drawing number 324 in FIG. 4) and pressure spring to be deleted from the printer 1, thereby simplifying the configuration and operation of the printer 1. becomes smoother and has the effect of reducing costs.

In addition, the movable blade 40 is composed of a main part 41 and left and right side parts 42 integral with the main part 41, and the bush plate 324 does not need to be installed, so that the As shown in Figures 8 and 10, the configuration of the main portion 41 at the front and rear of the movable blade 40 is simplified.

Therefore, the movable blade 40 can be made lighter and the operation of the movable blade 40 becomes smoother than before.

Also, in the case of the guide member 50, the existing operating guide (see drawing number 322 in FIG. 4) is deleted and is provided to guide the entire movable blade 40.

Therefore, compared to the existing operating guide and its surrounding configuration, the configuration of the printing paper cutting device 1a of the printer 1 according to the present invention can be simpler.

In addition, a support portion 29 is formed at the lower end of the cover member 20 and is bent in the direction of the movable blade 40, and this support portion 29 is connected to the lower frame 13 of the adjacent main body portion 10a. A plurality of insertion holes (29a, 29b) and insertion wings (29c) are formed so that they can be inserted into.

The operation of the printing paper cutting device 1a for a printer according to the present invention having the above-described configuration will be described as follows.

Referring again to FIGS. 5 to 10, the printing paper cutting device 1a for a printer according to the present invention covers the movable blade 40 from the rear, and is elastic to enable guidance when operating the movable blade 40. A major feature is that it is provided with a cover member 20 that covers it.

By providing such a cover member 20, the existing bush plate 324, etc. can be deleted, and the configuration of the movable blade 40 or the guide member 50 and its surroundings can be simplified.

In addition, the gear cover part 28, which can cover and protect the gear part 60, can be molded integrally with the cover member 20, so as to assemble the printing paper cutting device 1a for a printer according to the present invention. Performance and cost can be reduced.

As described above, the present invention has been described with reference to an embodiment shown in the drawings, but this is merely illustrative, and various modifications and equivalent embodiments can be made by those skilled in the art. You will understand.

Therefore, the true scope of protection of the present invention should be determined only by the appended claims.

1. Printer
1a. Printing paper cutting device
10a. main body
12. Protruding jaw
20. Cover member
21. Pusher
22. Dust cover part
22a. cutting part
23. Elasticity increase hole
24. Weight loss department
25. Connection
27. Fixed part
27a. fixing hole
27b. Refusal to remove
28. Gear cover part
28a,28b. fastening hole
30a. Cover part
40. Operation day
50. Guide member
60. Gear part

Claims (6)

A movable blade installed on the main body to be able to go up and down;
a fixed blade paired with the movable blade and fixed to the cover for cutting printing paper;
Including a cover member that covers the movable blade from the outside,
The cover member is,
a pusher on the back of the movable blade that directly contacts the movable blade during a cutting process due to relative movement of the movable blade and the fixed blade, is connected to ground, and applies a cutting pressure to the movable blade;
a gear cover part formed integrally with the pusher and covering a gear part that drives the movable blade;
A printing paper cutting device for a printer, comprising a dust cover portion formed on an upper end of the pusher to block dust from entering the printer. According to paragraph 1,
A printing paper cutting device for a printer, characterized in that a connection part for integrally connecting the gear cover part is formed on one side of the pusher. According to paragraph 2,
A printing paper cutting device for a printer, characterized in that a thinning portion is formed between the pusher and the connecting portion. According to paragraph 2,
A fixing part for fixing the cover member to the main body is formed on the upper part of the connecting part,
A printing paper cutting device for a printer, characterized in that a removal part is formed at the front end of the fixing part and is bent upward so that the fixing part can be removed from the main body. According to paragraph 1,
A printing paper cutting device for a printer, characterized in that cutting parts are formed at regular intervals in the dust cover part. According to paragraph 1,
A printing paper cutting device for a printer, characterized in that the gear cover part is formed with a plurality of fastening holes through which the end of each gear shaft is inserted or fastened to one side of the main body through a fastening member.

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