WO2004076139A1

WO2004076139A1 - Cutter device and printer

Info

Publication number: WO2004076139A1
Application number: PCT/JP2004/002153
Authority: WO
Inventors: Hitoshi Fujiwara
Original assignee: F & F Limited
Priority date: 2003-02-28
Filing date: 2004-02-24
Publication date: 2004-09-10
Also published as: JPWO2004076139A1; TW200418619A

Abstract

A cutter device has a movable blade and a stationary blade. The movable blade has a body as part of a circumferential wall of a circular hollow cylinder and a blade edge as at least part of one edge of the body which edge extends in a direction substantially along the central axis of the body, and is rotated about the central axis. The stationary blade is provided at a position where the stationary blade and the blade edge of the movable blade slide on each other when the movable blade is rotated. In the cutter device, a state where paper is fed to the cutter device and a state where the paper is cut can be switched to each other only by rotating the movable blade. As a consequence, a cutter device driven by a simple drive mechanism and a more compact printer with a cutting function can be provided.

Description

Description Cutter equipment and printers Technical field

The present invention relates to a cutter device for cutting paper and a printer equipped with the cutter device. Background art

2. Description of the Related Art Printers equipped with a cutter device for cutting printed roll paper are known. As a cutter device, a rotary cutter in which both blades or only one blade rotates is known.

Rotary cutters that rotate the blades can use a simple mechanism to transmit the power of the motor to the movable blades. Therefore, there is a possibility that a compact printer with an automatic cutting function can be provided by combining it with a printer that uses roll paper.

Since the rotary power cutter is driven to rotate, the power transmission mechanism from the motor should be simple in principle. However, the structure of the cutter is complicated, and the mechanism for operating the cutter is actually complicated. In particular, when incorporating into a printer, it is necessary to cut the paper through the paper so that it does not hit the cutting edge. Even if a rotary cutter is used, a compact printer with a cutting function has not been realized.

For example, the rotary cutter disclosed in Japanese Patent Application Laid-Open No. 8-112798 rotates two drums each having a spirally mounted knife, and the structure of the cutter is not simple. The cost of the cutter unit is high because a rotor with a spiral knife is used. In addition, it is necessary to insert paper using the paper feeder according to the moving speed of the knife of the cutter. Therefore, in consideration of synchronization with the paper feeder, a simple drive mechanism cannot realize a force-tutter device mounted on the printer. Also, to open the blade edge so that paper can be fed, I have to let go. When a mechanism for this is added, the cutter device becomes more complicated.

Therefore, an object of the present invention is to provide a rotary type cutter device in which the structure of the cutter can be simplified and the driving mechanism can be also simplified. Another object of the present invention is to provide a cutter device that can easily feed paper. Another object is to make the cutter device more compact, to further reduce the space occupied by the cutter device in the printer, and to realize a more compact printer using roll paper. Disclosure of the invention

According to the present invention, there is provided a cutter device including a movable blade having a main body forming a part of a peripheral wall of a cylinder, and a cutting edge forming at least a part of one edge extending in a direction substantially along a central axis of the main body. provide. This movable blade is a movable blade having a shape in which a part of a cylinder is cut in the axial direction, and at least a part of one edge extending in the axial direction of the cut portion has a cutting edge. . The movable blade is rotated about its central axis, and the paper is cut by rubbing the movable blade with the fixed blade. That is, the cutter device of the present invention is the movable blade described above, wherein the movable blade is rotatably driven about its central axis, and is disposed at a position where the movable blade rubs against the cutting edge of the movable blade when the movable blade rotates. And a fixed blade provided with the formed cutting edge.

In the cutter device of the present invention, since the movable blade has a shape in which a part of a cylinder is cut out, by rotating the movable blade, when the cutout comes to a position facing the fixed blade, the cutting edge of the movable blade and the fixed blade are fixed. A gap is formed between the blade and the cutting edge. Therefore, the movable blade is driven so that the position becomes the home position, and the medium to be cut, for example, printing paper, can be supplied to the gap between the movable blade and the fixed blade, and then the movable blade is rotated. Can be cut. Therefore, by simply rotating the movable blade around the central axis, the paper edge can be supplied by separating the movable blade from the fixed blade and the paper path through the cutter device can be formed. Further, by rotating the movable blade, the paper can be cut by rubbing the edges of the movable blade and the fixed blade. The cutter device according to the present invention provides a state in which paper is supplied to the cutter device by simply rotating the movable blade, and cutting the paper. It is not necessary to swing the movable blade or the fixed blade to secure a gap that becomes a paper path, and no operation other than rotating the movable blade is required. Therefore, the driving mechanism of the cutter device becomes very simple.

The cutting edge of the movable blade may be in a direction along the central axis of the main body, that is, parallel to the central axis. The fact that the cutting edge of the movable blade extends in a direction substantially along the center axis of the main unit means that the cutting edge of the movable blade is basically in the direction along the center axis of the main unit, but is slightly inclined with respect to the center axis. Includes cases where In this cutter, the angle of the rake between the movable blade and the fixed blade can be easily secured by making the direction of extension of the blade edge of the movable blade oblique to the center axis. Although the angle of the fixed blade can be secured by making the cutting edge of the fixed blade oblique to the center axis of the movable blade, it is difficult to determine the position where the cutting edge of the fixed blade contacts the cutting edge of the movable blade. In the cutter device of the present invention, since the cutting edge of the movable blade passes through the position defined by the radius from the center axis, the position at which the cutting edge of the fixed blade rubs against the fixed blade changes even if the extending direction of the cutting edge of the movable blade is inclined. Absent. For this reason, these cutting edges are reliably rubbed or meshed with each other, and a stable sharpness can be secured. In addition, when the edge of the movable blade is engaged with the edge of the fixed blade, a fixed angle is formed between the tangential direction and the outer peripheral surface of the movable blade, and that angle can be used as a clearance angle. . Therefore, the edge of the main body of the movable blade, which is the cutting edge, may be cut at an appropriate angle with respect to the outer peripheral surface of the main body. No need to apply or sharpen. Therefore, a movable blade that can be manufactured at low cost can be provided.

In addition, since the clearance angle can be secured by the shape of the movable blade main body, the clearance angle can be maintained even if the cutting edge is worn down. For this reason, it is possible to provide a cutter device that has high durability and does not lose sharpness even when it is polished. Furthermore, the smaller the radius of the cross section of the movable blade, the larger the clearance angle can be secured, so that the power cutter device of the present invention is suitable for a compact device with a small movable blade diameter. · The movable blade of the present invention may be formed by cutting a cylindrical main body to form an edge serving as a cutting edge. It is also possible to manufacture by bending a metal plate of appropriate thickness with its edges cut off to form a main body. In that case, one edge of the metal plate cut off before plastic working can be used as a cutting edge. With this manufacturing method, the movable blade can be further reduced. Can be manufactured at low cost. In addition, since the main body of the movable blade has a shape that forms a part of the peripheral wall of the cylinder, the vicinity of both ends of the main body of the movable blade is merely approximated to the cylinder, and that part is used as a shaft to support the bearing for rotation. Movable blade can be provided.

To prevent the blade edge of the movable blade that is rotated and the blade edge of the fixed stationary blade from colliding with each other, while the blade edges are rubbed against each other in a pressurized state, it is necessary to use a movable blade. It is desirable that at least one end of one of the two blades be provided with a portion for guiding the blade edge of the movable blade with respect to the blade edge of the fixed blade. One example of a guide is to make the end of the body (the end in the central axis direction) cylindrical. By making it cylindrical, the end of the main body always comes into contact with the fixed blade, so that the movable blade can be guided to an appropriate position where it rubs against the fixed blade. The guide portion may have a diameter smaller than that of the movable blade, and the radius thereof may gradually approach the radius of the blade. If the position of the fixed blade edge changes elastically, the fixed blade edge hits the guide at the extended position, and the guide portion contacts the movable blade edge while pushing down the fixed blade edge. Can be led to.

By rubbing the edge of the movable blade and the edge of the fixed blade in an elastic state, the edges are pressed against each other or pressurized, so that the edges are reliably rubbed against each other and a sharp cutting can be performed. The fixed blade is provided with a main body that supports the blade in an elastic manner and the fixed blade has elasticity, so that the blade can be easily guided by the above-described guide portion. At the same time, if the cutting edge of the fixed blade is pressed against the cutting edge of the movable blade, no gap is opened between the cutting edges even if the cutting edge of the movable blade is worn, and good sharpness can be maintained. Even when the main body of the movable blade has a small diameter, is thin, or is a flexible movable blade, the fixed blade is deformed according to the deformation of the movable blade, so that high sharpness can be maintained. The main body of the fixed blade itself may have elasticity, or may be elastically pressurized using an elastic member such as a separate spring or rubber.

According to the present invention, it is possible to provide a simple configuration of a force cutter device capable of feeding and cutting a medium only by rotating a movable blade having a simple configuration. A movable blade with a simple configuration can be supplied at low cost, has high durability, and it is easy to reduce the diameter. Therefore, when a cutter device is installed in a printer or the like, the space occupied by the cutter device can be made very small, and it is necessary to cut the medium. The power meter device of the present invention can be mounted on various devices.

A printer using roll paper is an example of a device suitable for mounting the cutter device of the present invention. Since the space for mounting the cutter function can be reduced, and the cost can be reduced, a printer with a cutter function that is space-saving and low-cost can be provided. That is, the printer of the present invention is a printer including the cutter device, a paper feeding unit that sends a sheet to the cutter device, and a unit that prints on the sheet. The diameter of the main body of the movable blade can be as small as several millimeters, and even with such a small-diameter movable blade, there is the advantage that a large clearance angle can be obtained, which reduces the performance as a cutter device or printer. is not. Therefore, according to the present invention, a cutter function can be mounted on a compact portable printer at low cost.

By setting the cross-sectional shape perpendicular to the center axis of the movable blade main body to a semicircle or an arc smaller than the semicircle, that is, an arc having a central angle of 180 degrees or less, a paper path that does not interfere with the cutter device and the paper is provided. When paper is fed along a paper path through a cutter device that can be configured, the driving device drives the movable blade edge away from the fixed blade edge so that the paper is basically Can secure a paper path that can pass straight through the force cutter without hitting the blade edge.

Also, the main body of the movable blade can be used as a paper guide. In a movable blade having a curved main body that forms a part of a cylinder, the other edge of the main body can be bent toward the central axis, and the bent portion can form a surface for guiding a sheet. By adjusting the angle of the guide surface formed inside the main body of the movable blade, it is possible to add a function as a curl remover that removes curl of roll paper and curl of paper generated in the printing process. It is. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional view showing a configuration of a printer equipped with a power meter device according to the present invention.

FIG. 2 is a perspective view showing the configuration of the cutter device.

Figure 3 (a) shows the cutter device when the movable blade is at the home position, FIG. 3 (b) is a diagram showing the cutter device when the cutting edges of the movable blade and the fixed blade have started to engage, and FIG. 3 (c) is a diagram showing the power cutter device in which the movable blade has further rotated.

FIG. 4A is a diagram illustrating the cutter device when the movable blade is at the home position, and FIG. 4B is a diagram illustrating the cutter device when the movable blade is rotated.

FIG. 5 is a diagram showing a cutter device having a movable blade having one edge bent toward the central axis.

FIG. 6A is a perspective view of a cutter device having a movable blade provided with a shaft, and FIG. 6B is a cross-sectional view of the cutter device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a schematic configuration of a power printer 10 according to the present invention and a printer 1 incorporating the same. The printer 1 in this example is a thermal type printer that prints on roll paper 2, and is connected to a mobile phone or PDA via an appropriate interface (not shown) capable of transmitting and receiving data such as a USB or infrared interface. The print data and control data are received from a host device such as a desktop personal computer and printed on the roll paper 2.

The printer 1 includes a paper storage unit 3 for storing the staple paper body 2 X, a line thermal head 5 for printing on roll paper (continuous paper or paper) 2 supplied from the paper storage unit 3, A platen roller 6 that feeds paper with the paper 2 sandwiched between it and the line thermal head 5, a cutter device 10 that automatically or manually cuts the printed roll paper 2, and both a platen roller 6 and a cutter device 10 And a driving mechanism (driving device) 19 for supplying power from the motor 7 to the platen roller 6 and the cutter device 10. The drive mechanism 19 is a wheel train that transmits the rotational power of the motor 7. When the motor 7 rotates forward, the drive mechanism 19 rotates the platen roller 6, and when the motor 7 rotates reversely, it drives the movable blade 21 of the power cutter 10. . For this reason, the drive mechanism 19 is provided with two one-way clutches 19a and 19b having different active directions. The drive mechanism 19 only needs to rotationally drive the platen roller 6 and the movable blade 21. Therefore, the drive mechanism 19 can basically be constituted only by gears. The roller 6 is disposed between the paper storage unit 3 in which the roll paper body 2X is stored and the line thermal head 5. The roll paper 2 is supplied from below the platen roller 6 which is a paper feeding means. The roll paper is printed on the outer surface 2 a by the thermal head 5, and is output upward (in the Z direction) from the paper discharge roller 9 on the upper surface 8 a of the housing 8.

The cutter device 10 is arranged inside the housing 8 directly below the paper discharge port 9, and cuts the printed roll paper 2 into a predetermined size and outputs the cut paper. For example, a 74 mm wide Lorenole paper 2 can be cut into A7 size (105 mm x 74 mm) and output from the paper exit 9 as cut paper or cut sheet paper.

The cutter device 10 includes a blade or fixed blade 11 fixed above the platen roller 6 and a movable blade 21 installed above the blade or fixed blade 11. The movable blade 21 includes a main body 25 that rotates about a central axis 29 and a cutting edge 22 that is one edge of the main body 25. When the main body 25 rotates, the cutting edge of the fixed blade 1 1 1 2 and the movable blade 2 1 cut the roll paper 2 by rubbing the blade tip 2 2. The movable blade 21 is located at the position where the main body 25 stops on the opposite side (the side in the X direction) of the fixed blade 11 across the paper path 50 through which the printed continuous paper 2 passes through the cutter device 10. The home position is set, and at that position, the paper 2 passes through the cutter device 10. Therefore, the cutter device 10 of the present embodiment can cut the paper 2 by rotating the movable blade 21, and can pass the paper 2 without cutting it by further rotating. For this reason, the rotation output of the motor 7 is transmitted by the simple wheel train mechanism 19, and the control can be performed by rotating the movable blade 21. Therefore, the size of the printer body on which the cutter device 10 is mounted can be summarized in a compact manner. In addition, since all controls can be performed only by rotating one movable blade 21, the power meter device can be driven with less power than when two rollers with knives are driven.

FIG. 2 shows a schematic configuration of the cutter device 10 using a perspective view. FIG. 3 is a cross-sectional view of the cutter device 10 taken along a plane (XZ plane) perpendicular to a center axis 29 extending in the Y-axis direction. FIG. 4 is a cross-sectional view when the cutter device 10 is cut along the XY plane. In the fixed blade 1 1, the cutting edge 1 2 extends in the direction Y of the center axis 29 of the movable blade 2 1, that is, the cutting edge 1 2 has the center axis 29 of the movable blade 21. The main body 15 is a single blade having a parallel thickness and one plate having an appropriate thickness so as to contact the movable blade 21 with elasticity. For example, the main body 15 of the fixed blade 11 can be manufactured by bending a thin play 1 of stainless steel 1 mm or less. In this example, the main body 15 of the fixed blade 11 has a support portion 14 extending horizontally (X direction) and an elastic portion 1 extending obliquely upward (Z direction) at approximately 45 degrees from the support portion 14. And the cutting edge 12 is formed so that the angle is deviated in the horizontal direction (X direction) from the elastic portion 13 that supports the cutting edge. With such a configuration, it is possible to form the cutting edge 12 having an appropriate facing angle and clearance angle by using the cutting edge 12 that is obtained by cutting the plate almost vertically.

The movable blade 21 includes a main body 25 that forms a part of the peripheral wall of the cylinder, and one edge 2 2 extending in a direction slightly inclined with respect to a direction along the center axis 29 of the main body 25 (Y direction). At least a part of the cutting edge 23. The overall shape of the movable blade 21 of this example is about half (half circumference) of the peripheral wall of a cylinder having a diameter of about 6 mm to 8 mm. The shape of the movable blade 21 may be a shape in which a half circumference of a cylinder is cut off, and as shown in FIGS. 3 (a) to 3 (c), the center axis of the main body 25 of the movable blade 21 The cross section perpendicular to 29 has a substantially semicircular arc shape.

The cutting edge 22 of the movable blade 21 extends as a whole in the axial direction 29. Specifically, as shown in FIGS. 4 (a) and (b), both ends 2 2 s of the cutting edge are fixed blades 1 1 It is almost V-shaped projecting in the direction of. That is, the cutting edge 22 extends in a direction inclined with respect to the center axis 29, and an appropriate shear angle (rake angle) is formed with respect to the cutting edge 12 of the fixed blade 11 extending in parallel with the center axis 29. 0 1 is formed. Therefore, when the movable blade 21 rotates, the edge 22 of the movable blade 2 1 and the edge 12 of the fixed blade 1 1 are at one point, and the outer edges 2 2 s and 1 of the respective edges 2 2 and 1 2 are provided. Move inward from 2 s while touching sequentially. Therefore, the paper 2 sandwiched between the movable blade 21 and the fixed blade 11 can be cut smoothly.

The V-shaped cutting edge 22 ensures a large shear angle θ 1 (eg, 5 degrees or more) with a short width. The cutting edge of the movable blade 21 is not V-shaped, but can be extended almost straight at an appropriate angle in a direction inclined with respect to the central axis 29. The movable blade 21 moves alternately between the cut position and the home position by making a circular motion in one direction. It is possible to place. In this example, the cutting position and the home position are alternately located by reciprocating around the central axis 29. In such a case, the V-shaped apex of the cutting edge 22 is further depressed to prevent the paper 2 from being cut only at that portion and to temporarily hold the cut paper 2. Both are possible. It is also possible to perform a so-called partial cut.

The movable blade 21 can also be constituted by one plate having an appropriate thickness. For example, one side of a thin stainless steel plate with a thickness of 1 mm or less is cut into a V-shape to form a cutting edge 22 and then bent into a cylindrical shape by pressing. Thereby, the movable blade 21 provided with the main body 25 forming a part of the cylindrical peripheral wall and the cutting edge 22 can be formed extremely easily. By using plastic working such as pressing, rolling, and forging, it is possible to form a cylindrical main body and then force the cutting edge to form it.However, in many cases, the plate is cut. Manufacturing is easy. In any of the manufacturing methods of the movable blade 21, no special processing for forming a cutting edge such as a knife is required, and no processing for assembling a separately manufactured cutting edge or sharpening the cutting edge is required. Therefore, the movable blade 21 can be provided at extremely low cost.

Furthermore, as shown in FIG. 3, since the movable blade 21 has a cylindrical shape as a whole, at the position of the blade edge 22 contacting the blade edge 12 of the fixed blade 11 1, an angle 0 2 with respect to the tangential direction is set. The clearance angle is secured. Therefore, similarly to the fixed blade 11, it is possible to use the edge of the main body 25, which is a part of the cylindrical shape, with the plate cut off, as the blade edge 22 of the movable blade 21. Also in this regard, the movable blade 21 does not require any processing for sharpening the cutting edge or shaping the shape, as in the case of the fixed blade 11, and can be manufactured at low cost. Furthermore, even if the cutting edge 22 wears and becomes worn out, the appropriate clearance angle Θ2 caused by the shape of the movable blade 21 is maintained as it is, so the cutting edge 22 is cut even when worn. It is possible to provide a highly durable movable blade 21 without losing taste.

In the movable blade 21 of this example, the main body 25 has a substantially semi-cylindrical shape, and a cross section orthogonal to the axis 29 has a substantially semicircular or smaller circular arc. The movable blade 21 has a substantially semicircular cross section at both ends 22 s of the V-shaped cutting edge 22, and has a circular cross section smaller than the semicircle at the center. Furthermore, the length along the center axis 29 of the cutting edge 22 Is greater than or equal to the width of the paper to be cut. Therefore, at the home position H where the cutting edge 2 2 of the movable blade 2 1 is separated from the cutting edge 12 of the fixed blade 1 1, there is sufficient paper for the paper 2 to pass between the fixed blade 1 1 and the movable blade 2 1. A path 50 is formed. Therefore, as shown in FIG. 3 (a), the movable blade 2 1 is provided with the center axis 29 in the traveling direction of the paper 2 with respect to the fixed blade 1 1 so that the cutting edge 1 2 of the fixed blade 1 1 The paper 2 can be guided to the gap between the movable blade 21 and the blade edge 22. By rotating the movable blade 21 as it is, the blade edges can be rubbed together. For this reason, there is no need for a mechanism that moves the movable blade 21 or moves the positional relationship between the movable blade 21 and the fixed blade 11 at all. Furthermore, since the main body 25 of the movable blade 21 of this example has a semi-circular cross section or less, when the movable blade 21 is stopped at the home position H, the main body 25 on the side opposite to the blade edge 22 is not positioned. The paper 2 can be passed through the cutter device 10 almost straight without applying the paper 2 to the edge 2 3.

At the end of the edge where the cutting edge 22 of the movable blade 21 is formed, that is, both ends of the cutting edge 22 extending in the direction of the center axis 29, at the stop position (home position) H, the fixed blade 1 There is provided a guide 24 s that can get over the cutting edge 12 of 1. Therefore, when the movable blade 21 starts rotating from the home position H around the center axis 29, as shown in FIG. 3 (b), the movable blade 21 is guided by the guides 24s at both ends, and the movable blade 21 The cutting edge 22 and the cutting edge 12 of the fixed blade 11 1 are smoothly rubbed or engaged with each other, so that they do not interfere with each other and the cutting edge does not spill. For this reason, it is possible to press or press the cutting edge 1 2 of the fixed blade 1 1 against the cutting edge 22 of the movable blade 2 1 by giving elasticity to the fixed blade 1 1 side, and rub the blade edges together. A sharp cutter device 10 can be provided.

The fixed blade 1 1 has elasticity so that the blade can be pressed against the movable blade 21 so that even when the blade wears, there is a gap between the blades 1 2 and 22 when cutting. It does not occur and has high durability. The guy 24 s may be a member that protrudes from the cutting edge 22 in the direction in which the diameter decreases, as in this example, and further has a cylindrical shape or a solid shape in a range where the movable blade 21 rotates. It may be a member forming a part thereof. By constantly contacting the cutting edge 12 of the fixed blade 1 1 within the range in which the movable blade 21 moves, the cutting edge of the fixed blade 1 2 can be smoothly guided to the cutting edge 22 of the movable blade. Movable blade 2 When 1 further rotates and the fixed blade 1 1's cutting edge 1 2's both ends 1 2 s of the movable blade 2 1's cutting edge 2 2's both ends 2 2 s rub against each other, the cutting edges become guides, and The blades rub each other smoothly. Therefore, once a cut is made at both ends of the roll paper 2 in the paper width direction Y, the position where the cutting edges 1 2 and 22 rub against each other along the rotation of the movable blade 21 1 is directed toward the center of the roll paper 2. To move sequentially, and the staple paper 2 is cut.

As shown in FIG. 3 (c), when the movable blade 21 is rotated by about 90 degrees from the home position H, the roll paper 2 is cut. During this time, since the movable blade 21 is cylindrical, the angle at which the cutting edges 12 and 22 rub against each other is always kept constant from the start of the cutting of the roll paper 2 to the end of the cutting, and uniform cutting performance is obtained. . Thereafter, the movable blade 21 may be reversed to return to the home position H, and furthermore, can be rotated in the same direction to return to the home position H. Rotating in the same direction and returning to the home position H makes the configuration of the drive mechanism 19 easier.

FIG. 5 shows a schematic configuration of a different cutter device 10a of the present invention. The movable blade 2 la in the present example forms a paper guide 27 by bending an edge 23 of the main body 25 opposite to the cutting edge 22 toward the direction of the central axis 29. With this paper guide 27, the paper that has passed through the paper path 50 between the cutting edges 12 and 22 can be guided in an appropriate angle direction. In particular, by contacting the inner side 2b of the roll paper 2 with the paper guide 27, the roll paper 2 can be guided by the paper guide 27 in a direction opposite to the curl or curl, and the movable blade 21 curls. Function can be added. Then, as shown in the figure, by arranging the thermal head 5 so as to print on the inside 2 b of the roll paper 2, the flat surface 2 b printed by the paper guide 27 becomes flat. Roll paper can be discharged. Therefore, by rotating the movable blade 21 and cutting the roll paper 2, it is possible to output printed paper having an appropriate size and a curl removed.

By bending the edge 23 opposite to the cutting edge 22 to form the paper guide 27, the shape of the movable blade 21 or the movable blade body 25 can be made closer to a cylinder, and the cutting edge 22 is formed. The possible area increases. Therefore, it is also possible to form a larger edge with a single corner 01. Alternatively, reduce the diameter of the movable blade 2 1 In addition, it is possible to secure a peripheral surface enough to form a cutting edge 22 having a sufficiently large shear angle θ 1, and to provide a thin and sharp movable blade 21. Therefore, a more compact cutter device 10a can be provided, and a power cutter device most suitable for being incorporated in a small or thin printer suitable for carrying can be provided. Further, even when the movable blade 21 has a small diameter and has a reduced strength and becomes a flexible movable blade rather than a rigid body, the fixed blade 11 is elastic in the cutter devices 10 and 10a of the present invention. The blade 12 of the fixed blade 11 also deforms following the deformation of the movable blade 21. Therefore, a cutter device with high sharpness can be provided even if the movable blade 21 has a small diameter.

FIGS. 6 (a) and 6 (b) show a schematic configuration of a further different cutter device 10b of the present invention. As shown in Fig. 6 (a), the main body 25 of the movable blade 21b of the cutter device 10b is formed such that the portions 35 and 36 near both ends are almost cylindrical. The parts 35 and 36 can be used as shafts for rotatably supporting the movable blade 21 with respect to the bearings 33 and 34. In the movable blade of the present invention, a portion excluding the blade edge, for example, a cylindrical portion can be used as a shaft portion. FIG. 6 (b) shows a state where the gears 19a and the bush 31 to which power is transmitted from the motor 7 are attached to the shaft portions 35 and 36 of the movable blade 21b. In this example, the shaft portions 35 and 36 are shaft portions in which the mounted bush 31 and gear 19a are rotatably supported by the bearings 33 and 34. The movable blade 21b can also be driven to rotate by bringing the roller 36 directly into contact with the bearings 33 and 34. The movable blade 21b has a notch 22a for a partial force at the center of the blade edge 22.

The printer equipped with the cutter device of the present invention is not limited to the line thermal type described above, but may be a serial type thermal printer in which the print head moves in the scanning direction. Further, the printer is not limited to the thermal type, and the cutter device of the present invention can be applied to all types of printers, including an ink jet type or laser type line printer or a page printer. In addition, a printer generally indicates a device for printing on paper, and a facsimile machine, a copier, and the like are also included in the present invention. Media other than paper, such as cloth, The present invention is also applicable to a cutter device for cutting a plate or the like.

Further, in the above, a motor dedicated to the force for rotating the movable blade with a motor shared with the platen roller may be provided, and furthermore, a lever for driving the movable blade 21 is exposed from the housing 8 to the outside. Alternatively, the movable blade 21 may be manually driven to rotate. In any case, the power cutter according to the present invention can be moved from the home position by simply rotating the movable blade 21, and the power can be returned to the home position. Can be powered. Industrial applicability

The cutter device of the present invention has a simple mechanism and can be downsized. Therefore, devices such as printers that require a cutter mechanism can be made compact, and by combining with roll paper, more compact desktop and portable printers can be provided.

Claims

The scope of the claims

1-A body that forms a part of a peripheral wall of a cylinder, and a cutting edge that forms at least a part of one edge that extends in a direction substantially along the center axis of the body, and is driven to rotate about the center axis. With a movable blade,

A cutter device comprising: a fixed blade provided with a cutting edge disposed at a position where the movable blade rubs against the cutting edge of the movable blade when rotated.

2. The cutter device according to claim 1, wherein a blade edge of the movable blade extends in a direction inclined with respect to the central axis.

3. The power cutter according to claim 1, wherein the movable blade includes a portion at at least one end of the one edge, the portion guiding the cutting edge of the movable blade with respect to the cutting edge of the fixed blade.

.

4. The cutter device according to claim 1, wherein the movable blade is made of a metal plate.

5. The cutter device according to claim 1, wherein the vicinity of both ends of the main body of the movable blade is substantially cylindrical.

6. The cutter device according to claim 1, wherein a cross-sectional shape of the main body of the movable blade perpendicular to the central axis is a semicircle or an arc shape smaller than the semicircle.

7. The cutter device according to claim 1, wherein the main body of the movable blade has a portion whose other edge is bent in the direction of the central axis.

8. The power meter device according to claim 1, wherein the fixed blade has a main body that elastically supports the cutting edge of the fixed blade and rubs against the cutting edge of the movable blade.

9. A power cutter device according to claim 1,

Means for feeding paper to the cutter device;

Means for printing on the paper.

10. The cross-sectional shape of the main body of the movable blade perpendicular to the central axis is a semicircle or an arc shape smaller than the semicircle,

The printer according to claim 9, further comprising a driving device that sets a cutting edge of the movable blade to a position away from a cutting edge of the fixed blade when feeding the sheet along a paper path passing through the force cutter device.

1 1. The printer according to claim 9, wherein the main body of the movable blade has a portion whose other edge is bent in the direction of the central axis.

12. The printer according to claim 11, wherein a portion of the main body of the movable blade bent in the direction of the central axis is arranged at a position to guide a printing surface of the paper.

13. A movable blade having a main body that forms a part of a peripheral wall of a cylinder, and a cutting edge that forms at least a part of one edge extending in a direction substantially along a central axis of the main body.

14. The movable blade according to claim 13, wherein the blade edge extends in a direction inclined with respect to the central axis.

15. A movable blade having a shape in which a part of a cylinder is cut out in an axial direction, wherein at least a part of one edge extending in the axial direction of the cutout part is a cutting edge.

16. A cutter device comprising: the movable blade according to claim 15; and a fixed blade provided with a blade disposed at a position where the movable blade rubs against the blade when the movable blade rotates.