JP2009107090A - Paper cutting unit in printing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper cutting unit in a printing apparatus, which reciprocates a movable blade of the printing apparatus at a high speed, performs full cutting or partial cutting by changing a motion stroke of the movable blade, and detects an initial position of the movable blade. <P>SOLUTION: A supporting member for supporting the movable blade and a cam lever are independently and drivably connected with each other via independently disposed engagement portions of outward and homeward levers. A detecting arm for detecting the initial position of the movable blade is protrudedly disposed at the cam lever. The partial cutting for cutting a paper sheet with a portion left uncut or the full cutting for completely cutting the paper sheet is performed by switching a motor to a normal or reverse rotation, which switches the motion stroke of the movable blade. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, in a printer device using roll paper, the paper cutting unit is improved so that the moving operation of the movable blade can be followed in accordance with the increase in the speed of the printer device, and the operation stroke of the movable blade is changed. The present invention relates to a paper cutting unit in a printer apparatus that can perform full cut / partial cut and can detect the operation position of a movable blade.

  For example, in a printer device for POS, a receipt or a journal paper is issued using roll paper. Generally, in such a printer device, a paper printing unit for printing on the roll paper and the printed paper on the roll paper are used. And a paper cutting section for cutting the paper.

For example, as shown in FIGS. 19 and 20, the paper cutting unit 1 includes a movable blade 2 having an upper surface V-shape by combining a pair of blade members, a support member 3 that supports the movable blade 2, and a movable The blade 2 includes a cam lever 4 that drives the support member 3 so as to move toward a fixed blade that is a straight blade (not shown), and a return spring 5 that returns the movable blade 2 to the initial position together with the support member 3. Further, the cam lever 4 is configured to be dynamically connected to the motor 9 via the gear 7 and the motor gear 8 that constitute the electric deceleration drive mechanism 6.
With such a configuration, by rotating the motor 9 in one direction, the cam lever 4 rotates, and the support member 3 and the movable blade 2 are moved toward the fixed blade via the raising lever 4a provided on the cam lever 4, and the motor By rotating 9 in the reverse direction, the support member 3 and the movable blade 2 are returned to their initial positions by the urging force of the return spring 5.

In addition, there is a demand for selectively using so-called partial cut and full cut in the paper cutting unit of such a printer apparatus.
Partial cut refers to cutting a receipt printed on roll paper into a partially connected state without completely cutting. This is to avoid the receipt falling from the outlet and being lost before being delivered to the customer.
On the other hand, full cut means that a ticket printed on roll paper is completely cut. This is convenient when it is necessary to consider the appearance of the cut surface of the paper cut surface.

  In order to make it possible to selectively use a partial cut and a full cut, for example, in Patent Document 1, a V-shaped movable blade with a notch in the center is moved toward a fixed blade by a driving means. When the cutout part does not cut the paper, the movable blade cuts the paper, leaving a part of the paper to be cut partially, and after realizing the partial cut, the movable blade is retracted from the paper It is assumed that a full cut is realized by reverse line feed of the sheet by the sheet conveying means before the sheet is fed.

JP 2002-128378 A

  Further, in the paper cutting unit of the printer device, although not shown in order to detect the operation position (movable blade), for example, a detection projection is provided at a specific position of the gear constituting the electric deceleration drive mechanism. By detecting this using a detecting means such as a limit switch, the initial position of the paper cutting section is detected and used as an operation command as control information.

The following inconveniences and improvements have been pointed out in the paper cutting section of the printer apparatus as described above.
First, as an operation means of the movable blade in the paper cutting unit,
(1) When the movable blade 2 is operated toward the fixed blade, the support member 3 and the movable blade 2 are moved toward the fixed blade via the raising lever 4a provided on the cam lever 4, while the movable blade 2 is initially set. When returning to the position, the return spring 5 is returned to the initial position by the urging force. Therefore, if the movable blade 2 is moved up and down at a high speed, the followability of the return spring 5 is limited. This hinders high-speed driving.
Further, as in Patent Document 1, in order to selectively use the partial cut and the full cut, after the partial cut is realized, the paper is transported by the paper transport unit before the movable blade is retracted from the paper. By means of realizing a full cut by reverse line feed,
(2) The number of parts of the switching mechanism is increased, and the algorithm is complicated, for example, the operation timing of the movable blade operation mechanism and the sheet conveying means must be taken into account, making it difficult to reduce costs.
In the method of exchanging the dedicated cutter,
(3) It is time-consuming, complicated, and inefficient.
In addition, a detection protrusion is provided at a specific position of the gear constituting the electric deceleration drive mechanism, and this is detected by detection means such as a limit switch, thereby detecting the initial position of the paper cutting portion. Then
(4) The detection means must be provided in the immediate vicinity of the gear, and this is a major obstacle when the other detection means is mounted at one location and the mounting structure of the printer device is simplified.
The present invention has been proposed to improve the inconvenience as described above, and in a printer apparatus using roll paper, the paper cutting unit is improved and the printer apparatus is movable in response to the increase in the speed of the printer apparatus. To provide a paper cutting section in a printer device that can follow the reciprocating motion of the blade, change the operation stroke of the movable blade, enable full cut / partial cut, and detect the operation position of the movable blade. Objective.

  In order to solve the above-described problems, in the invention described in claim 1, a fixed blade, a movable blade that moves forward toward the fixed blade, a support member that supports the movable blade, and the movable blade are fixed together with the support member. A cam lever that drives the support member so as to move forward toward the blade, and an electric speed reduction drive mechanism that applies a driving force to the cam lever, and urges the movable blade to return to the initial position together with the support member. In the paper cutting unit in the printer device including the return spring, the cam lever includes a forward lever that causes the movable blade to move forward together with the support member toward the fixed blade, and a return lever that causes the movable blade to move backward together with the support member. The support member is provided with engaging portions of the forward lever and the backward lever of the cam lever, and the forward lever of the cam lever and the engaging portion of the backward lever And the dynamic lever respectively engaged, the cam lever by, characterized in that a configuration for reciprocally driving the movable blade together with the support member.

  As a result, similar to the case where the movable blade is moved toward the fixed blade by the forward lever, when returning to the original position, the return lever is used in addition to the return spring, so when driving at high speed, It can be made to follow sufficiently without delay.

  In the invention according to claim 2, the cam lever includes a detection arm interlocked with the cam lever, and includes detection means for detecting that the movable blade has reached a predetermined operation position by the operation of the cam lever by detecting the detection arm. It is characterized by that.

  As a result, if the movable blade is brought to a predetermined position, the position of the movable blade is grasped by detecting the position of the detection arm in conjunction with the detection arm in the set positional relationship with the movable blade. be able to.

  The invention according to claim 3 is characterized in that the detection arm is set at a position deviating from a region detectable by the detection means when the movable blade is in the initial position.

  Thereby, the initial position of the movable blade can be grasped with high accuracy.

  According to a fourth aspect of the present invention, the electric speed reduction drive mechanism performs a first partial cut that cuts a part of the paper by cutting the movable blade through the cam lever by forward and reverse rotation driving of the electric motor. And a power switching transmission mechanism for transmitting the power of the second operation stroke for executing a full cut for completely cutting the sheet.

  As a result, by switching the electric motor to drive forward and reverse, the power switching transmission mechanism can drive the movable blade up and down with different first and second operation strokes, selectively between partial cut and full cut. Be able to run.

  Further, the invention described in claim 5 is characterized in that a series of reciprocating motions of the movable blade is performed by driving the electric motor in the electric deceleration driving mechanism in one rotation direction.

  Thus, the sheet cutting operation can be performed by one-way continuous rotation of the drive mechanism, and high-speed operation is possible with simple control.

Hereinafter, an embodiment of a printer apparatus including a paper cutting unit according to the present invention will be described and described.
FIG. 1 shows an example of a POS printer device 10.
The printer device 10 uses a roll paper to issue a receipt or a journal paper, and includes a main body unit 11 in which a roll paper containing and conveying unit, a paper printing unit, and a paper cutting unit (described later) are disposed. A top unit 12 provided with the roll paper storage / conveyance unit, a paper printing unit, and a paper cutting unit so as to be exposed / shielded is provided, and an operation lever 13 for opening and closing the top unit 12 is provided. The top unit 12 is provided with operation buttons Sw for performing various operation commands.

2 and 3, the printer device 10 has a configuration in which a main body frame 11 is accommodated in a main body unit 11 surrounded by an outer case 14, and a top frame 16 is accommodated in a top unit 12.
The main body frame 15 is formed by applying a well-known plastic processing to a thin metal plate based on the design, and a control board Pb is disposed on the bottom side. In the main body frame 15, a roll paper accommodating and conveying unit 17, a paper printing unit 18, and a paper cutting unit 19 are disposed at a position below the operation lever 13 disposed on the front end side of the top frame 16.

  The roll paper storage and conveyance unit 17 has a storage space in which the top frame 16 and the main body frame 15 can store a roll paper R having a predetermined width and winding diameter. The roll paper R drawn from the storage space A paper guide unit 20 is provided for providing the printing unit 18. The paper guide unit 20 is composed of an upper guide unit 21 provided on the top frame 16 side and a transport panel 22 on the main body frame 15 side facing each other with a predetermined gap.

  The paper printing unit 18 includes a platen roller 23 provided on the main body frame 15 side, and a print head 24 provided on the upper guide unit 21 side of the top frame 16. Further, a paper guide 25 is disposed between the platen roller 23 and the adjacent paper cutting section 19.

The sheet cutting unit 19 will be described in detail below.
The paper cutting unit 19 has a unit structure that is detachably disposed on the main body frame 15 adjacent to the front of the paper printing unit 18.
That is, the paper cutting unit 19 is a guillotine-type paper cutting mechanism, and is fixed to a fixed blade 26 (see FIG. 2) having a linear blade fixed to the tip of the upper guide unit 21 of the top frame 16 and a frame 27. And a pair of members 28a and 28b, which are housed in the same manner, have a movable blade 28 that has an obtuse V-shaped blade shape by matching each other. Of the pair of members 28a and 28b constituting the movable blade 28, a cutout portion C for realizing a partial cut is formed on one of the upper surfaces of the abutting portions (see FIG. 4). .
Separately from the main body frame 15, the frame 27 is adjacent to the position where the paper printing unit 18 is disposed in the main body frame 15, and is attached to the front side so that the upper side can be opened and closed about the lower support shaft B. Thus, both side portions on the upper side are fixed to the main body frame 15 side by fixing screws 29. A movable blade 28 is accommodated in the frame 27 via a support member 30.

The paper cutting unit 19 includes a support member 30 that supports the movable blade 28, a cam lever 31 that drives the support member 30 so that the movable blade 28 moves forward toward the fixed blade 26, and the movable blade 28 as a support member. 30 and a return spring 32 that urges the actuator 30 to return to the initial position. The cam lever 31 has a forward lever 31a (hereinafter referred to as a raising lever 31a) and a backward movement lever 31b (hereinafter referred to as a lowering lever 31b) projecting from the rotational central shaft portion 31x, and the rotational central shaft portion 31x. On the other hand, the movable reduction blade 28 is reciprocated (lifted / lowered) via the support member 30 by the electric deceleration drive mechanism 33.
In addition, a detection arm 34 protrudes from the rotation center shaft portion 31x. As will be described in detail later, the cam lever 31 is displaced and the support member 30 and the movable blade 28 are moved toward the fixed blade 26. The detection arm 34 is displaced and brought to the detection position of the photo sensor 35 (photo interrupter) on the sensor substrate Sb, so that the position of the movable blade 28 is detected (see FIG. 8).

Next, the electric deceleration drive mechanism 33 will be described.
The electric deceleration drive mechanism 33 is disposed on the outer side of the main body frame 15 and applies a driving force to the rotation center shaft portion 31x of the cam lever 31. The drive motor 36 and the drive motor 36 serve as a power switching transmission mechanism. The worm gear 38 that is mounted on the output shaft 37, the idle gear 39 that meshes with the worm gear 38, and the support shaft G provided at a predetermined position of the idle gear 39 are pivotally supported and linked to the rotational axis Z of the idle gear 39. A support plate 40 provided with first and second switching holes h1 and h2 and a transmission pin P for interposing the shaft K so that the drive radius can be switched, and a transmission pin P of the support plate 40 with a long hole Lh. It is comprised with the transmission arm 41 connected mechanically via (refer FIG. 5, FIG. 15).

Here, the paper cutting unit 19 shown in FIG. 4 will be described in more detail.
That is, as described above, the cam lever 31 that drives the support member 30 so that the movable blade 28 moves toward the fixed blade 26 and the support member 30 are raised levers protruding from the rotation center shaft portion 31x of the cam lever 31. 31a and the lower lever 31b are engaged.
The raising lever 31a is engaged so as to hit the engaging groove 42, which is an engaging portion formed by cutting the lower portion of the support member 30, from below. At this time, the raising lever 31a and the engaging groove 42 are arranged so that even if the raising lever 31a is inclined, the contact portion is changed from the surface contact to the line contact so that the contact portion proceeds continuously without a step. The inner upper wall surface is formed in a convex shape with an appropriate curvature (see FIG. 6).
On the other hand, the lowering lever 31b and the support member 30 are engaged with each other by inserting the distal end side of the lowering lever 31b into the insertion hole 43, which is an engaging portion formed in the support member 30. At that time, the lower lever 31b and the insertion hole 43 have a convex surface with an appropriate curvature so that the contact portion advances continuously without a step even if the lower lever 31b is inclined downward. (See FIG. 7).

Further, the detection arm 34 projecting from the rotation center shaft portion 31x of the cam lever 31 has a shape in which the tip portion expands in a fan shape, and when the movable blade 28 is in the initial lowest position, various sensors are used. By positioning the fan-shaped tip of the detection arm 34 in contact with the side of the photosensor 35 (photointerrupter) mounted on the lower surface side of the mounted sensor substrate Sb, the detection arm 34 is a photosensor. 35 non-detection positions are reached (see FIGS. 8 and 9).
Therefore, when the movable blade 28 is in the initial lowest position, the detection signal from the photosensor 35 is 0, and the electric deceleration drive mechanism 33 is driven to displace the cam lever 31, thereby supporting the support member 30 and the movable blade. By raising 28 toward the fixed blade 26, the detection arm 34 is interlocked and brought to the detection position of the photo sensor 35 (photo interrupter), and the movable blade 28 is in a position raised from the initial position. This is a configuration to grasp (see FIGS. 10 and 11).

Further, an operation stroke for the paper cutting unit 19 by the electric deceleration driving mechanism 33 will be described.
As described above, the paper cutting unit 19 is a guillotine type paper cutting mechanism, and moves the movable blade 28 together with the support member 30 toward the fixed blade 26 fixed to the tip of the upper guide unit 21 of the top frame 16. Thus, the roll paper R fed between the movable blade 28 and the fixed blade 26 is cut (see FIG. 12).
The partial cut is executed by raising the movable blade 28 by the first operation stroke and stopping the notch C of the movable blade 28 immediately before the cutting edge of the fixed blade 26 (see FIG. 13).
On the other hand, the full cut is performed by raising the movable blade 28 in the second operation stroke and bringing the movable blade 28 so that the notch C of the movable blade 28 passes over the cutting edge of the fixed blade 26 (FIG. 14). reference).
In the above case, the first operation stroke is less than the second operation stroke, and in order to operate the movable blade 28 with the first and second operation strokes, the drive motor 36 in the electric deceleration drive mechanism 33 is driven to rotate forward / reversely, A long hole Lh is formed in a worm gear 38 attached to the output shaft 37 of the drive motor 36, an idle gear 39 meshing with the worm gear 38, and a transmission pin P projecting at a predetermined position of a support plate 40 fixed to the idle gear 39. This is realized by actuating the transmission arm 41 mechanically connected via the transmission arm 41.

Therefore, the mechanism configuration of the electric deceleration drive mechanism 33 for operating the first and second operation strokes will be described in more detail.
In other words, in order to switch the movable blade 28 by the first and second operation strokes, the drive motor 36 in the electric deceleration drive mechanism 33 is driven forward / reversely.
In this case, as shown in FIG. 15, the drive motor 36 is driven and the idle gear 39 is rotated counterclockwise via the worm gear 38, so that the support plate 40 is centered on the support shaft G with the idle gear 39. In a state where the rotation axis Z and the interlocking shaft K of the idle gear 39 move along the first and second switching holes h1 and h2, and are in contact with one end side of the first and second switching holes h1 and h2, The cam lever 31 is displaced from the transmission pin P via the transmission arm 41 with the distance between the rotation axis Z of the idle gear 39 and the transmission pin P as the first drive radius, and is movable in the first operation stroke (see FIG. 13). The blade 28 is configured to actuate the support member 30 and execute a partial cut.

  On the other hand, as shown in FIG. 16, by rotating the drive motor 36 in the reverse direction and rotating the idle gear 39 clockwise through the worm gear 38, the support plate 40 is centered on the support shaft G with the idle gear 39. In a state in which the rotation axis Z and the interlocking shaft K of the idle gear 39 move along the first and second switching holes h1 and h2, and are in contact with the other ends of the first and second switching holes h1 and h2, The cam lever 31 is displaced from the transmission pin P via the transmission arm 41 with the distance between the rotation axis Z of the idle gear 39 and the transmission pin P as the second drive radius, and is movable in the second operation stroke (see FIG. 14). The blade 28 is configured to operate the support member 30 to perform a full cut.

The paper cutting unit in the printer apparatus according to the present invention is configured as described above, and the operation thereof will be described next.
When a print command is issued from the host side, the roll paper R is pulled out from the roll paper accommodation / conveyance unit 17 in the main body frame 15, and the platen roller 23 in the paper print unit 18 is driven by a drive mechanism (not shown).
The roll paper R is conveyed between the platen roller 23 and the print head 24 along the paper guide portion 20, and is printed by the print head 24.

The roll paper R that has passed between the platen roller 23 and the print head 24 is inserted between the fixed blade 26 and the movable blade 28 (see FIG. 12), and the movable blade 28 is moved toward the fixed blade 26. The roll paper R can be cut.
That is, the paper cutting unit 19 rotates the drive motor 36 in one direction in response to a paper cut command from the host side, whereby power is transmitted to the idle gear 39 through the output shaft 37 and the worm gear 38, and further, the idle gear The transmission pin P on the support plate 40 attached to 39 is transmitted to the transmission arm 41 through the elongated hole Lh, the cam lever 31 is displaced by the rotation of the rotation center shaft portion 31x, and the raising lever 31a is supported by the support member 30. Then, the movable blade 28 is pushed up and lifted toward the fixed blade 26 (see FIGS. 17 and 18).
Further, when the drive motor 36 is rotated in the same direction, the support member 30 and the movable blade 28 are returned to the initial position by the lowering lever 31b together with the return spring 32 (see FIGS. 4 and 5).
As described above, the printed roll paper R can be cut into a predetermined length and discharged as a receipt.

  By the way, as described above, when the movable blade 28 is moved toward the fixed blade 26 by the paper cut command from the host side, the raising lever 31a is engaged with the lower portion of the support member 30 against the urging force of the return spring 32. Abutting on the mating groove 42 from the lower side, the raising lever 31a is tilted upright so that the inner wall surface on the inner side of the convex engaging groove 42 (see FIG. 6) is continuously changed from a surface contact to a line contact without a step. Therefore, the movable portion 28 can be raised smoothly without rattling.

When the movable blade 28 is lowered, if the drive motor 36 is rotated in the same direction, the support member 30 and the movable blade 28 are returned to the initial position by the lowering lever 31b under the bias of the return spring 32. However, as the lowering lever 31b is tilted downward, the contact point advances continuously without a step in contact with the convex inner lower wall surface of the insertion hole 43 of the support member 30 (see FIG. 7). Therefore, the operation impact is suppressed and the movable blade 28 can be smoothly returned to the initial position.
As described above, since the vertical movement of the movable blade 28 of the paper cutting unit 19 is performed by both the raising lever 31a and the lowering lever 31b, even when the cam lever 31 is driven at high speed, the movable blade 28 is caused to follow and move up and down at high speed. Operation is possible.

When the movable blade 28 and the support member 30 are lowered, the detection arm 34 protruding from the rotation center shaft portion 31x of the cam lever 31 is interlocked so that the tip portion that expands in a fan shape is the lower surface of the sensor substrate Sb. The tip of the detection arm 34 is brought to the side of the photosensor 35 by moving away from the detection position of the photosensor 35 on the side (see FIGS. 8 and 9).
As a result, the detection signal from the photosensor 35 becomes 0, it is grasped that the movable blade 28 has reached the initial minimum position, and a standby state for the next operation command is entered.
Thus, since the detection arm 34 is set to reach the non-detection position of the photosensor 35 when the movable blade 28 reaches the initial minimum position, the stop position accuracy of the movable blade 28 is improved.

  Then, in response to a paper cut command from the host side, in this printer device 10, a partial cut (see FIG. 13) that cuts the roll paper R, leaving a part, and a full cut that completely separates the roll paper R from the cut portion. (See FIG. 14) A command is possible.

  When the partial cut command is issued, as shown in FIG. 15, the drive motor 36 is driven and the idle gear 39 is rotated counterclockwise via the worm gear 38, so that the support plate 40 is supported by the idle gear 39. The rotation shaft Z and the interlocking shaft K of the idle gear 39 move along the first and second switching holes h1 and h2 around G, and come into contact with one end side of the first and second switching holes h1 and h2. In this state, the cam lever 31 is displaced from the transmission pin P via the transmission arm 41 with the interval between the rotation shaft Z of the idle gear 39 and the transmission pin P as the first drive radius and the first operation stroke (FIG. 13). Reference), the movable blade 28 can be operated by the support member 30 to perform partial cut.

  On the other hand, when a full cut command is issued, as shown in FIG. 16, the drive motor 36 is driven in reverse to rotate the idle gear 39 clockwise through the worm gear 38. The rotating shaft Z and the interlocking shaft K of the idle gear 39 move along the first and second switching holes h1 and h2 around the support shaft G, and the other end sides of the first and second switching holes h1 and h2. , The cam lever 31 is displaced from the transmission pin P via the transmission arm 41 with the distance between the rotation axis Z of the idle gear 39 and the transmission pin P as the second drive radius, and the second operation stroke. (See FIG. 14) The movable blade 28 can be operated by the support member 30 to perform a full cut.

As described above, by performing a full cut command and a partial cut command by a paper cut command from the host side, the drive motor 36 can be rotated forward and reverse to perform a partial cut and a full cut. The paper can be cut freely according to the demands, such as full cuts can be made every few sheets.
Moreover, it is not necessary to replace the dedicated blade as before, and the cutter stroke switching mechanism is unnecessary, and it can be realized with a simple switching transmission mechanism. Highly flexible paper cutting is possible.

As described above, according to the present invention,
(1) Since the vertical movement of the movable blade 28 of the paper cutting unit 19 is performed by both the raising lever 31a and the lowering lever 31b, the movable blade 28 can be sufficiently driven to follow even when driven at high speed.
(2) As before, in order to detect the operating position (movable blade), a detection projection is provided at a specific position of the gear constituting the electric deceleration drive mechanism, and this is detected by the detection means. Compared with the method of performing, the initial position of the movable blade 28 of the paper cutting unit 19 can be detected with a simple configuration, the stop position accuracy is improved, and there is no variation in the stop position due to component wear, and the high accuracy. Control becomes possible.
(3) Since a full cut command and partial cut command can be issued by a paper cut command from the host side, it is not necessary to replace the dedicated blade as before, and a cutter stroke switching mechanism is not required. In addition, since it can be realized with a simple switching transmission mechanism, the manufacturing cost can be suppressed, and a highly reliable and flexible paper cutting can be performed.
(4) Since the sheet cutting operation is performed by one-way continuous rotation of the drive mechanism, high-speed operation is possible with simple control.

1 is an external perspective view illustrating an example of a printer device including a paper cutting unit according to the present invention. FIG. 2 is an external perspective view showing a structure inside an exterior case in the printer apparatus shown in FIG. 1. FIG. 2 is an explanatory cross-sectional view of the printer apparatus shown in FIG. 1. FIG. 5 is a front view of a movable blade at an initial position and an electric deceleration driving mechanism that drives the movable blade in the paper cutting unit according to the present invention. FIG. 5 is a perspective explanatory view of the movable blade shown in FIG. 4 and an electric deceleration drive mechanism that drives the movable blade. It is a perspective view explaining the mechanical coupling structure of a movable blade and a cam lever. It is the perspective view which cut and showed some, in order to demonstrate the mechanical coupling | bonding structure of a movable blade and a cam lever. It is side surface explanatory drawing which showed the structure for detecting the initial position of a movable blade. It is perspective explanatory drawing which showed the structure for detecting the initial position of a movable blade. It is side surface explanatory drawing when a movable blade is raised. It is a perspective explanatory view when a movable blade is raised. It is typical explanatory drawing which showed the state which sent roll paper between the movable blade and the fixed blade. It is typical explanatory drawing which showed the operation state of the movable blade at the time of performing a partial cut. It is typical explanatory drawing which showed the operation state of the movable blade at the time of performing full cut. It is mechanism explanatory drawing explaining the transmission mechanism structure in the electric deceleration drive mechanism which gives the operation | movement stroke for performing the partial cut shown in FIG. It is a mechanism explanatory drawing explaining the transmission mechanism structure in the electric deceleration drive mechanism which gives the operation | movement stroke for performing full cut shown in FIG. It is a front view when a movable blade is raised. It is a perspective explanatory view when a movable blade is raised. It is the principal part front view which showed the raising / lowering mechanism of the conventional movable blade. It is the principal part perspective view which showed the raising / lowering mechanism of the conventional movable blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Printer apparatus 11 Main body unit 12 Top unit 13 Operation lever 14 Exterior case 15 Main body frame 16 Top frame 17 Roll paper accommodation conveyance part 18 Paper printing part 19 Paper cutting part 20 Paper guide part 21 Upper guide unit 22 Conveyance panel 23 Platen roller 24 Print head 25 Paper guide 26 Fixed blade 27 Frame 28 Movable blade 29 Fixed screw 30 Support member 31 Cam lever 31a Raising lever 31b Lowering lever 31x Rotating center shaft portion 32 Return spring 33 Electric deceleration drive mechanism 34 Detection arm 35 Photo sensor 36 Drive motor 37 Output shaft 38 Worm gear 39 Idle gear 40 Support plate 41 Transmission arm 42 Engaging groove 43 Insertion hole 42 Motor Sw Operation button Pb Control board R Roll paper C Notch B Support shaft Sb Sa substrate h1 first switching 換穴 h2 second switching 換穴 P transmission pin Lh slot G spindle Z rotation axis K interlocking shaft

Claims (5)

A fixed blade, a movable blade that moves forward toward the fixed blade, a support member that supports the movable blade, and the support member that drives the movable blade together with the support member toward the fixed blade. A paper cutting section in a printer apparatus comprising a cam lever and an electric speed reduction driving mechanism that applies a driving force to the cam lever, and a return spring that urges the movable blade together with the support member to return to the initial position. In
The cam lever includes a forward lever that moves the movable blade together with the support member toward the fixed blade, and a backward lever that moves the movable blade together with the support member,
The support member is provided with an engaging portion of a forward lever and a backward lever in the cam lever,
The forward lever and the backward lever of the cam lever are engaged with the engaging portions of the forward lever and the backward lever, respectively, and the movable blade is driven to reciprocate together with the support member by the cam lever. A paper cutting unit in a printer device characterized by the above.   The cam lever includes a detection arm that is interlocked with the cam lever, and further includes detection means for detecting by detecting the detection arm that the movable blade has reached a predetermined operation position by the operation of the cam lever. The paper cutting unit in the printer apparatus according to claim 1.   3. The sheet cutting in the printer device according to claim 2, wherein the detection arm is set to a position that is out of a region that can be detected by the detection unit when the movable blade is in an initial position. Department.   The electric decelerating drive mechanism includes a first operation stroke for performing a partial cut that cuts a part of the paper by cutting the movable blade through the cam lever by forward and reverse rotation driving of the electric motor, and the paper 2. The sheet cutting unit according to claim 1, further comprising a power switching transmission mechanism that transmits power of a second operation stroke for performing a full cut for completely cutting the first cut.   The paper cutting unit according to claim 1, wherein a series of reciprocating motions of the movable blade is performed by driving an electric motor in the electric deceleration driving mechanism in one rotation direction.

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