CUTTER DEVICE AND PRINTING APPARATUS

A cutter device includes a fixed blade extending in a first direction, a fixed shaft extending in a second direction intersecting the first direction, a round blade that is rotatably supported by the fixed shaft, comes into contact with the fixed blade and moves in the first direction while rotating, and an urging portion that presses the round blade in the second direction along the fixed shaft. A load of the round blade pressing the fixed blade is at least 300 gf, a diameter of the round blade is at least 20 mm, and D/L is not greater than 2.0, where the diameter of the round blade is D and a length over which the fixed shaft supports the round blade is L.

The present application is based on, and claims priority from JP Application Serial Number 2019-129019, filed Jul. 11, 2019, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND

1. Technical Field

The disclosure relates to a cutter device and a printing apparatus.

2. Related Art

In related art, a cutter device is known that is built into a printing apparatus and the like, and that cuts a printed continuous sheet. JP-A-2011-235428 discloses a cutter device using a round blade as a movable blade. When the cutter device is mounted on a label printer, which is an example of the printing apparatus, and performs cutting of a label sheet, an adhesive interposed between the label and a backing adheres to a round blade, and when the cutting is performed a number of times, the adhered adhesive accumulates on the round blade, increases, and eventually causes a cutting defect. In terms of the configuration of the cutter device and the label printer, when it is difficult to dismantle and clean the round blade, it is necessary to replace the cutter device when the accumulation of the adhesive on the round blade progresses and a failure in cutting the label sheet occurs.

In order to increase the lifespan of the cutter device over which the replacement is not necessary, it is conceivable to increase a diameter of the round blade in order to increase an allowable amount of the adhesive that can accumulate on the round blade. However, simply increasing the diameter of the round blade increases the diameter of the round blade relative to the length of a fixed shaft that fixes the round blade, and as a result, a gouging force that bears on the fixed shaft when the round blade rotates is increased and inhibits the rotation of the round blade, which may result in cutting defects. In other words, it is difficult to achieve both an extended lifespan of the cutter device and a suppression of cutting defects.

SUMMARY

A cutter device includes a fixed blade extending in a first direction, a fixed shaft extending in a second direction intersecting the first direction, a round blade rotatably supported by the fixed shaft and configured to come into contact with the fixed blade positioned in the second direction and to move in the first direction while rotating, and an urging portion configured to press the round blade in the second direction along the fixed shaft. A load of the round blade pressing the fixed blade is at least 300 gf, a diameter of the round blade is at least 20 mm, and D/L is not greater than 2.0, where the diameter of the round blade is D and a length over which the fixed shaft supports the round blade is L.

In the cutter device described above, where a gap between a contact surface of the round blade that comes into contact with the fixed blade and a wall surface facing the contact surface is X, the gap X is preferably at least 1.0 mm.

The cutter device preferably includes a first gear configured to rotate the round blade, the urging portion preferably includes a flange and a spring member, and the round blade is preferably sandwiched between the first gear and the flange.

The cutter device preferably includes a holder configured to hold the round blade, the fixed shaft, the urging portion, and the first gear, an endless belt spanning a pair of pulleys along the first direction, and a rack extending along the first direction. The holder preferably engages with the endless belt and moves in the first direction in accordance with a movement of the endless belt, and the first gear is preferably engaged with the rack via a second gear.

A printing apparatus includes the cutter device described above.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

1. First Embodiment

FIG. 1is a perspective view illustrating a configuration of a cutter device according to a first embodiment.FIG. 2is a perspective view illustrating a configuration of a holder.FIG. 3is a cross-sectional view taken along a line A-A inFIG. 1. First, a configuration of a cutter device1will be described. Note that, in coordinates indicated in the drawings, both directions along a Z axis are up-down directions and an arrow direction is “up”, both directions along an X axis are left-right directions and an arrow direction is “right”, and both directions along a Y axis are front-rear directions and an arrow direction is “front”. Further, a first direction corresponds to the left-right direction, and a second direction that intersects the first direction corresponds to a rearward direction.

As illustrated inFIG. 1andFIG. 3, the cutter device1includes a frame10in which each of portions of the cutter device1is configured. The frame10has a rectangular shape that is long in the left-right direction, in a plane that includes the X axis and the Z axis. A pair of pulleys20is provided along the left-right direction, substantially in the center along the up-down direction of the frame10. The pair of pulleys20includes a first pulley21and a second pulley22. The first pulley21is provided at a position near the left end of the frame10, and the second pulley22is provided at a position near the right end of the frame10. An endless belt25, one end of which is coupled to the other end of thereof, spans the pair of pulleys20.

Power to rotate the first pulley21is supplied to the first pulley21from a motor via a plurality of gears. The endless belt25moves in the left and right directions as a result of the rotation of the first pulley21. A section of the endless belt25that spans above the pair of pulleys20is engaged with a holder40that holds a round blade45and the like. The holder40moves in the left and right directions in accordance with the movement of the endless belt25.

The frame10includes a fixed blade support portion14that supports a fixed blade15extending in the left-right direction. The fixed blade support portion14is coupled to the frame10and protrudes to the front from the frame10. With the frame10, the fixed blade support portion14forms a hollow quadrangular pillar shape that is long in the left-right direction, and straddles a section of the endless belt25that spans below the pair of pulleys20. The fixed blade15has a plate shape that is long in the left-right direction and is fixed to the front surface of the fixed blade support portion14. The fixed blade15has a cutting edge on the upper side thereof.

The frame10includes a subframe13. The subframe13is long in the left-right direction and is L-shaped in a side view from the left. The L-shaped side surface of the subframe13is coupled to the frame10. The bottom side of the L shape of the subframe13protrudes from the frame10so as to face the upper surface of the fixed blade support portion14, and supports the bottom surface of the holder40. A paper feed port16, which is communicated with a gap between the fixed blade support portion14and the subframe13, is provided in the frame10. For example, a label sheet S printed using the printing apparatus enters the interior of the cutter device1from the paper feed port16, and is transported along the gap between the fixed blade support portion14and the subframe13onto the fixed blade15.

The frame10includes a guide portion11that is engaged with the holder40and guides the movement of the holder40when the holder40moves in the left-right direction. The guide portion11is substantially the same length as the fixed blade15, which is a range of movement of the holder40in the left-right direction, and has an inverted L-shape in a side view from the left. The guide portion11is a plate-like rail that protrudes to the front from the upper end of the frame10and then further bends downward.

The frame10includes a rack12provided with a plurality of teeth on a long bar-shaped flat plate that extends along the left-right direction. The rack12is provided in parallel to and below the guide portion11, with the teeth facing downward. The rack12engages with a second gear57, and the second gear57engages with a first gear56that is coupled to the round blade45. A linear movement that moves the holder40in the left-right direction is converted to a rotational force by the second gear57engaged with the rack12, and this rotational force is transmitted to the first gear56that rotates the round blade45. That is, the round blade45moves in the left-right direction while rotating with respect to the fixed blade15.

The frame10is provided with a first sensor31and a second sensor32that detect the position of the round blade45. The first sensor31detects that the round blade45is positioned on the first pulley21side. The second sensor32detects that the round blade45is positioned on the second pulley22side. A snap-action switch that turns on and off through physical contact, a non-contact proximity sensor using light or magnetism, or the like can be used as the first and second sensors31and32.

The first sensor31is provided between the first pulley21and an end portion of the guide portion11on the first pulley21side in the left-right direction, and between the subframe13and the rack12in the up-down direction.

The second sensor32is provided between the second pulley22and an end portion of the guide portion11on the second pulley22side in the left-right direction, and between the subframe13and the rack12in the up-down direction.

As illustrated inFIG. 2andFIG. 3, the holder40includes a cover40aand a holder main body40b. A groove that slidably engages with the guide portion11is provided in the upper end of the holder main body40b. A belt engaging portion43that engages with the endless belt25is provided at the lower end of the holder main body40b. The holder40is configured to be guided by the guide portion11, and to be movable in the left-right direction together with the endless belt25.

The holder40includes the first arm41protruding from the holder main body40btoward the left side, and the second arm42protruding from the holder main body40btoward the right side. The first arm41and the second arm42extend from substantially the center in the up-down direction of the holder40, along the upper end of the subframe13.

When the holder40is positioned on the first pulley21side, the first arm41is positioned at a position facing a detector of the first sensor31. Specifically, by driving the motor that rotates the first pulley21, the holder40moves from the second pulley22side toward the first pulley21side, together with the endless belt25. When the holder40reaches the first pulley21side, the first sensor31senses that the first arm41is in contact with or in proximity to the detector. As a result, the driving of the motor that rotates the first pulley21is stopped, and the holder40is positioned on the first pulley21side.

When the holder40is positioned on the second pulley22side, the second arm42is positioned at a position facing a detector of the second sensor32. Specifically, by driving the motor that rotates the first pulley21, the holder40moves from the first pulley21side toward the second pulley22side, together with the endless belt25. When the holder40reaches the second pulley22side, the second sensor32senses that the second arm42is in contact with or in proximity to the detector. As a result, the driving of the motor that rotates the first pulley21is stopped, and the holder40is positioned on the second pulley22side.

The holder40holds the round blade45, a fixed shaft51, an urging portion55, and the first gear56. The fixed shaft51extending along the Y axis is provided between the cover40aand the holder main body40b. The first gear56, the round blade45, and the urging portion55are rotatably supported by the fixed shaft51in that order from the holder main body40btoward the cover40a. The urging portion55presses the round blade45in the front-rear direction along the fixed shaft51. Specifically, the urging portion55includes a flange53and a spring member54. The round blade45is sandwiched between the first gear56and the flange53. Specifically, the first gear56also functions as one flange that is necessary to sandwich the round blade45from both sides, and a pair of flanges is configured by the flange53and the first gear56. Further, a bushing52for smoothly rotating the first gear56, the round blade45, and the urging portion55with respect to the fixed shaft51is inserted between the fixed shaft51and the first gear56, the round blade45, and the urging portion55. In this way, the round blade45is rotatably fitted to the fixed shaft51.

A portion of the round blade45is exposed below the holder40, and the rear surface of the round blade45and the front surface of the fixed blade15are configured to be able to come into contact. The flange53presses the round blade45toward the first gear56, using the spring member54. As a result, the round blade45comes into contact with the fixed blade15positioned in the front-rear direction with a predetermined load. Further, the second gear57that is engaged with the rack12and the first gear56is provided between the holder main body40band the first gear56. Because the round blade45is coupled so as to be able to rotate together with the first gear56, the round blade45rotates in accordance with movement of the holder40in the left-right direction.

As a result of the round blade45rotating and moving in the left-right direction in a state in which the round blade45is in contact with and pressed against the fixed blade15, the cutter device1cuts the label sheet S that is transported from the paper feed port16and that protrudes to the front from the fixed blade15. Note that the driving of the cutter device1is controlled by a control unit provided for an apparatus, such as a printing apparatus, into which the cutter device1is incorporated.

FIG. 4is a view describing a force generated in each of portions by a pressing force of the urging portion55.FIG. 5is a graph showing a load of the round blade45and a cut state of the label sheet S.FIG. 6is a table showing numerical values of the forces generated in each of the portions.

A label S1on which printing is performed on the front surface thereof, a backing S3, and an adhesive S2interposed between the label S1and the mount S3are layered in the label sheet S. Stainless steel, which has excellent wear resistance, is used as the material of the round blade45and the fixing blade15that cut the label sheet S, for example, and a silicon coating suitable for cutting the adhesive S2is applied.

The vertical axis inFIG. 5shows the load of the round blade45pressing against the fixed blade15. The horizontal axis inFIG. 5corresponds to a sheet width of the label sheet S. A solid line illustrated inFIG. 5is a load fluctuation pattern when the round blade45is moved from one end of the label sheet S toward the other end thereof while varying the load by which a cutting edge along the outer periphery of the round blade45presses the fixed blade15. In other words, the solid line indicates that the label sheet S was cut while the load of the round blade45was decreased from 700 gf to 200 gf at a constant rate and the load was then increased from 200 gf to 400 gf at a constant rate. Regions GA indicate ranges in which the load of the round blade45was 300 gf or greater, and the label sheet S was cut well. A region BA indicates a range in which the load of the round blade45was less than 300 gf, and the adhesive S2adhered to the cutting edge of the round blade45and the fixed blade15caused a cutting defect of the label sheet S. From these results, it can be seen that by setting the load of the round blade45pressing the fixing blade15to 300 gf or greater, it is possible for the adhesive S2trying to attach to the cutting edges of the round blade45and the fixed blade15to be removed from the cutting edges, and the label sheet S can be favorably cut. Note that in the label sheet S used for the cutting, the paper material label S1has a thickness of approximately 120 μm, the acrylic-based adhesive S2has a thickness of approximately 15 μm, and the paper material backing S3has a thickness of approximately 70 μm.

By setting the load of the round blade45pressing the fixing blade15to 300 gf or greater, the adhesive S2removed from the cutting edge of the round blade45adheres to a contact surface45a, which is the back surface of the round blade45and which comes into contact with the fixed blade15. As the number of times of cutting the label sheet S increases, some of the adhesive S2spreads from the outer periphery of the round blade45toward the center thereof, and then further accumulates from the contact surface45atoward wall surfaces facing the contact surface45a. As illustrated inFIG. 3, a gap of 1.0 mm or greater is provided between the contact surface45aof the round blade45and each of the wall surfaces. In the present embodiment, a gap X between the contact surface45aand the wall surface of the second gear57is the narrowest gap, but the gap X secures a distance of 1.0 mm or greater. When the label sheet S is cut for a long period of time, the adhesive S2that adheres to the round blade45can accumulate in the gap X. In the present embodiment, the large round blade45having a diameter D of 20 mm or greater is employed. With the cutter device1using the round blade45with the diameter D of 20 mm and having the gap X of 1.0 mm, it was possible to cut the 8-inch wide label sheet S more than 50,000 times. Note that an upper limit value of the gap X is determined by an allowable size of the cutter device1in the front-rear direction.

The cutter device1is configured so that D/L is 2.0 or less, where the diameter of the round blade45is D and a length over which the fixed shaft51supports the round blade45is L. The length over which the round blade45is supported is a length including the round blade45, and the first gear56and the flange53that sandwich the round blade45.

FIG. 6shows the forces generated in each of the portions where the diameter D is 30 mm, and the length L over which the fixed shaft51supports the round blade45is 15 mm. P is a spring load of the spring member54that presses the round blade45from the front toward the rear along the fixed shaft51. F is a load of the round blade45pressing against the fixed blade15. M is a rotational moment at which the round blade45attempts to rotate about a point G of the fixed shaft51as a result of the round blade45pressing the fixing blade15, and M is obtained using the formula M=P×D/2. N is a normal force acting on the fixed shaft51at a point R at which each end of the bushing52comes into contact with the fixed shaft51by the bushing52gouging the fixed shaft51due to the rotational moment M of the round blade45, and N is obtained using the formula N=M/(L/2)/2. μ is a coefficient of friction between the fixed shaft51and the bushing52. μN is a force that obstructs the spring load, and μN is obtained using the formula μN=p×N. The load F by which the round blade45actually presses the fixed blade15is a value obtained by subtracting a force 2 μN that obstructs the spring load generated at two points from the spring load P, and is obtained using the formula F=P−2×μN.

The fixed blade15that is long in the left-right direction undulates slightly in the front-rear direction, and in order to maintain the load F of the round blade45moving in the left-right direction with respect to the fixed blade15at 300 gf or greater, it is necessary to set the load F of the round blade45to 600 gf. As shown inFIG. 6, in the cutter device1in which D/L is 2.0, in order to obtain the load F of the round blade45of 600 gf, it is necessary to use the spring member54with the spring load P of 1000 gf. The spring member54with the spring load P of 1000 gf can be realized by compressing a coil spring of approximately 10 mm in length, and can be mounted on the length L of 15 mm over which the fixed shaft51supports the round blade45.

When D/L is set to 2.0 or greater, it is necessary to use the spring member54having the large spring load P. If the spring load P of the spring member54is made too large, the normal force N, which is the gouging force bearing on the fixed shaft51, increases, and the rotation of the round blade45may be inhibited, resulting in the cutting defect of the label sheet S. Further, in order to increase the spring load P, it is necessary to employ a long coil spring, and in contrast, the size of the cutter device1in the front-rear direction may become larger. Further, a load of a motor for moving the round blade45in the left-right direction increases, and the lifespan of the motor may become shorter, or the size in the front-rear direction of the cutter device1may increase as a result of employing a larger motor. In other words, the upper limit of 2.0 for D/L is a value at which it is possible to realize the thin cutter device1provided with the large round blade45and capable of favorably cutting the label sheet S. Note that the lower limit for D/L is determined by the size of the round blade45used and the allowable size of the cutter device1in the front-rear direction.

According to the present embodiment, the following effects can be obtained.

In the cutter device1, in order to keep the load F of the round blade45pressing the fixed blade15at 300 gf or greater, at which the label sheet S is favorably cut, the load F is set to 600 gf. Since the cutter device1is configured such that D/L is 2.0 where the diameter of the round blade45is D and the length over which the fixed shaft51supports the round blade45is L, it is possible to realize the load F of the round blade45of 600 gf using the spring member54having the spring load P of 1000 gf or less. As a result, the normal force N, which is the gouging force that bears on the fixing shaft51, is suppressed, and it is thus possible to favorably cut the label sheet S without the rotation of the round blade45being obstructed.

Further, since the large round blade45having the diameter of 20 mm or greater is employed in the cutter device1, an area over which the adhesive S2is caused to accumulate on the round blade45is increased, and the lifespan of the cutter device1can be increased.

Accordingly, the cutter device1can be obtained that achieves both the extended lifespan of the cutter device1and the suppression of cutting defects.

In the cutter device1, the gap X between the contact surface45aof the round blade45and the wall surface of the second gear57is 1.0 mm or greater. As a result, when the label sheet S is cut for the long period of time, a volume can be secured for the adhesive S2that attaches to the round blade45to accumulate, and thus, the lifespan of the cutter device1can be increased.

The round blade45of the cutter device1is sandwiched between the first gear56and the flange53and is rotatably fitted to the fixed shaft51via the bushing52. Since the first gear56also serves as the flange forming the pair of flanges with the flange53in order to sandwich the round blade45from both sides, a number of parts can be reduced and the cutter device1can be made thinner.

The cutter device1includes the rack12, which is coupled to the round blade45via the first and second gears56and57. The round blade45is forced to rotate by the rotational force obtained by the second gear57engaged with the rack12converting the linear movement that moves the holder40, and thus, the round blade45can favorably cut the label sheet S.

2. Second Embodiment

FIG. 7is a cross-sectional view illustrating an internal configuration of a printing apparatus according to a second embodiment. The configuration of a printing apparatus100provided with the cutter device1described in the first embodiment will be described.

The printing apparatus100is configured by a housing101and a panel102capable of opening and closing part of the interior of the housing101with respect to the outside. The panel102is coupled to the housing101via a shaft105supported by the housing101and is configured to open and close toward the front with respect to the housing101, by pivoting about the shaft105. The panel102is a liquid crystal screen provided with a touch panel, and is configured to display visual information to a user and receive input operations from the user, for example. Note that a specific mechanism for opening and closing the panel102with respect to the housing101is not particularly limited. The cutter device1is built into the front of the interior of the printing apparatus100.

The printing apparatus100includes a control unit103, a housing unit104, a printing unit110, a transport unit120, and the like.

The control unit103is provided with a central processing unit (CPU) that is a processor, a memory, and the like. The control unit103generates recording data for recording on the label sheet S, as a result of the processor executing arithmetic processing in accordance with a program stored in the memory. As a result of the control unit103controlling each unit of the printing apparatus100on the basis of the recording data, an image or the like is recorded on the label sheet S. The processor is not limited to the single CPU, and may be configured to perform processing using a plurality of the CPUs, or a hardware circuit such as an application specific integrated circuit (ASIC), or may have a configuration in which the CPU and the hardware circuit perform the processing in concert with each other.

The housing unit104is provided to the rear inside the housing101, and forms a space for housing the label sheet S. A roll paper main body124, around which the long label sheet S is wound in a roll shape, is housed in the housing unit104. The printing apparatus100is configured to allow the roll paper main body124to be fitted into the housing unit104from a lid (not illustrated), by opening the lid. Recording is possible on the label sheet S using a recording agent, such as ink, toner, or the like, and the label sheet S may be any material that can be cut by the cutter device1.

The printing unit110is provided with a recording head111, a carriage112, a platen115, and the like.

The platen115supports the label sheet S that is wound out from the roll paper main body124and transported to a position facing the recording head111along the Y axis, which is a transport direction. The recording head111is disposed above the platen115.

The recording head111includes a plurality of nozzles capable of discharging ink, and performs recording using an ink-jet method. The recording head111receives a supply of the ink from an ink cartridge114. The recording head111and the ink cartridge114are mounted on the carriage112. The carriage112is supported by a guide rail113disposed along the X axis, and is configured to be reciprocally movable in both directions along the X axis, which is a main scanning direction. The recording head111performs the recording on the label sheet S by discharging the ink from the nozzles as the carriage112moves. The printing apparatus100is configured to allow replacement of the ink cartridge114and maintenance of the printing unit110by opening the panel102. Note that, in the present embodiment, as the recording head111, a serial head type is exemplified in which a head mounted on the carriage112discharges the ink while reciprocally moving in the main scanning direction, but the recording head111may be a line head type in which recording heads are arranged and fixed extending in the left-right direction along the X axis, that is, in a width direction of the label sheet S.

The transport unit120is provided with rollers121and122.

The rollers121and122are a pair of rollers disposed upstream of the platen115in the transport direction. The rollers121and122transport the label sheet S by rotating while sandwiching the label sheet S therebetween. The roller121is a drive roller that rotates as a result of being powered by a motor. The roller122is a driven roller that rotates in accordance with the rotation of the drive roller. Note that a configuration may be adopted in which a plurality of roller pairs are provided for transporting the label sheet S.

The cutter device1that cuts the label sheet S that is printed by the printing unit110and transported in the transport direction is provided downstream of the platen115in the transport direction.

Note that the printing apparatus100may be an apparatus configured to perform recording using a method that is not the ink-jet method. For example, in place of the recording head111, the printing apparatus100may be provided with a printer engine that performs recording by depositing toner onto the label sheet S using an electrophotographic method. Further, the printing apparatus100may be a thermal printer.

According to the present embodiment, the following effects can be obtained.

Since the printing apparatus100includes the cutter device1having a long lifespan, reliability of the printing apparatus100is improved.

Contents derived from the embodiments will be described below.

A cutter device includes a fixed blade extending in a first direction, a fixed shaft extending in a second direction intersecting the first direction, a round blade rotatably supported by the fixed shaft and configured to come into contact with the fixed blade positioned in the second direction and to move in the first direction while rotating, and an urging portion configured to press the round blade in the second direction along the fixed shaft. A load of the round blade pressing the fixed blade is at least 300 gf, a diameter of the round blade is at least 20 mm, and D/L is not greater than 2.0, where the diameter of the round blade is D and a length over which the fixed shaft supports the round blade is L.

According to this configuration, the cutter device presses a cutting edge of the round blade against the fixed blade with a load of at least 300 gf, and it is thus possible to favorably cut a label paper including adhesive. A gouging force that is generated when the urging portion presses the round blade along the fixed shaft and the cutting edge of the round blade comes into contact with the fixed blade and that bears on the fixed shaft is proportional to a pressing force pressing the round blade along the fixed shaft, and to the diameter D of the round blade, and is inversely proportional to the fixed shaft length L. Since D/L is set to be not more than 2.0, the pressing force of the urging portion that suppresses the gouging force can press the round blade against the fixed blade with the load of at least 300 gf. Since the large-diameter round blade having a diameter of at least 20 mm is employed in the cutter device, an area over which the adhesive is caused to accumulate on the round blade is increased, and the lifespan of the cutter device can thus be increased. Accordingly, the cutter device can be obtained that achieves both an extended lifespan of the cutter device and a suppression of cutting defects.

In the cutter device described above, where a gap between a contact surface of the round blade that comes into contact with the fixed blade and a wall surface facing the contact surface is X, the gap X is preferably at least 1.0 mm.

According to this configuration, it is possible to further increase the lifespan of the cutter device because a volume in which the adhesive attached to the round blade is accumulated is increased.

The cutter device preferably includes a first gear configured to rotate the round blade, the urging portion preferably includes a flange and a spring member, and the round blade is preferably sandwiched between the first gear and the flange.

According to this configuration, the round blade is sandwiched between the first gear and the flange of the urging portion. The first gear also functions as one of the flanges forming a pair of flanges necessary to sandwich the round blade45from both sides, and thus, a number of parts can be reduced and the cutter device can be made thinner.

The cutter device preferably includes a holder configured to hold the round blade, the fixed shaft, the urging portion, and the first gear, an endless belt spanning a pair of pulleys along the first direction, and a rack extending along the first direction. The holder preferably engages with the endless belt and moves in the first direction in accordance with a movement of the endless belt, and the first gear is preferably engaged with the rack via a second gear.

According to this configuration, the round blade is forced to rotate by a rotational force obtained by the second gear engaged with the rack converting a linear movement that moves the holder, and thus, the round blade can favorably cut the label sheet.

A printing apparatus includes the cutter device described above.

According to this configuration, since the printing apparatus includes the cutter device having the long lifespan, reliability of the printing apparatus is improved.