A cutting member of a printer, a cutting assembly, a printer and a control method thereof

Abstract

The application provides a cutter piece of a printer, a paper cutting assembly, a printer and a control method thereof. The cutter piece comprises a first cutter part and a first driving arm, and the first driving arm is provided with a first matching groove along a trajectory line. The trajectory line starts from a first proximal end, passes through a distal end, returns and ends at a second proximal end. The first proximal end is provided with a first limiting part, and the second proximal end is provided with a second limiting part. The paper cutting assembly comprises the cutter piece, the printer comprises the paper cutting assembly, and the control method comprises the following steps. When a first paper cutting instruction is acquired, a motor is controlled to rotate in a forward direction to drive a driving disc to rotate in a first direction. When the current value of the motor reaches a first preset value, the motor is controlled to stop rotating. When a second paper cutting instruction is acquired, the motor is controlled to rotate in a reverse direction to drive the driving disc to rotate in a second direction. When the current value of the motor reaches a second preset value, the motor is controlled to stop rotating. The application uses the change of the motor current to determine the limit positions of the full cutter and the half cutter, cancels the position sensor, simplifies the product structure and reduces the production cost.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more specifically to a printer cutter, paper cutting assembly, printer, and control method thereof that facilitates simplified construction. Background Technology

[0002] A printer has a built-in paper cutting assembly capable of both full cutting and dotted-line cutting (half cutting) of paper. The paper cutting assembly includes a mounting base, a drive assembly, a full-cutting blade, a half-cutting blade, a return spring, and a position detection device group. The drive assembly includes a motor, a gear set, and a drive disk connected in sequence. The drive disk rotates around a second axis. The drive disk has a first guide post and a second guide post at different circumferential positions, which respectively drive the half-cutting blade and the full-cutting blade. Both the half-cutting blade and the full-cutting blade rotate around a first axis. The half-cutting blade includes a first cutting section and a first drive arm at different positions on the first axis. Similarly, the full-cutting blade includes a second cutting section and a second drive arm at different positions on the first axis. The first drive arm is provided with a first mating groove for cooperating with the first guide post and adapting to the movement trajectory line of the first guide post. The second drive arm is provided with an abutment position for cooperating with the second guide post. In this way, a half-cutting can be achieved when the motor rotates forward, driving the drive disk to rotate in the first direction, and a full-cutting can be achieved when the motor rotates in the reverse direction, driving the drive disk to rotate in the second direction. A return spring is pulled between the second cutting section of the full-cutting blade and the mounting base. Under the action of the spring, the full-cutting blade tends to remain in the open position. Furthermore, the position detection device group includes two position sensors for detecting the open and closed positions of the half-cutting blade and two other position sensors for detecting the open and closed positions of the full-cutting blade.

[0003] The current paper cutting assembly has the problem that, based on the principle of using position sensors to detect when the cutter has reached its limit position, four position sensors need to be installed inside the printer, resulting in more printer parts, which is not conducive to simplifying the product structure and increases production costs. Summary of the Invention

[0004] The primary objective of this invention is to provide a printer cutter component that can determine the extreme positions of the full and half cutters by utilizing changes in motor current, thereby eliminating the need for a position sensor, simplifying the product structure, and reducing production costs.

[0005] The second objective of this invention is to provide a paper cutting component for a printer that can determine the extreme positions of the full cutter and the half cutter by utilizing changes in motor current, thereby eliminating the need for a position sensor, simplifying the product structure, and reducing production costs.

[0006] The third objective of this invention is to provide a printer that can determine the extreme positions of the full cutter and half cutter by utilizing changes in motor current, thereby eliminating the need for a position sensor, simplifying the product structure, and reducing production costs.

[0007] The fourth objective of this invention is to provide a printer control method that can determine the extreme positions of the full cutter and half cutter by utilizing changes in motor current, thereby eliminating the need for position sensors, simplifying product structure, and reducing production costs.

[0008] The first objective of this invention is to provide a printer cutter that rotates around a first axis. The cutter includes a first cutter portion and a first drive arm located at different circumferential positions on the first axis. The first drive arm is provided with a first mating groove opened along a trajectory line. The trajectory line starts from a first proximal end, passes through a distal end, turns back, and ends at a second proximal end. Both the first proximal end and the second proximal end are closer to the first axis than the distal end. The first proximal end is provided with a first limiting portion, and the second proximal end is provided with a second limiting portion.

[0009] As can be seen from the above scheme, under this configuration, the first mating groove is used to mate with the first guide post on the drive disk. The trajectory includes a first trajectory (from the distal end to the first proximal end) formed in the first mating groove when the first guide post rotates in a first direction and a second trajectory (from the distal end to the second proximal end) formed in the first mating groove when the first guide post rotates in a second direction. Thus, when the drive disk rotates in different directions and reaches its respective limit positions, it can mate with the first limiting part and the second limiting part respectively. At this time, the first guide post is restricted, and the motor torque and current both increase. In fact, by using a general or existing linkage between the drive disk, the cutting blade, and another cutting blade, when the first guide post mates with the second limiting part, the cutting blade of the other cutting blade is exactly in the closed position. At this time, the first guide post is restricted, and the motor torque and current both increase. In this way, whether the cutting blade or the half-cutting blade has reached the closed position can be determined based on the motor current value. Furthermore, the first guide post and the first mating groove can force the cutting blade to return to the open position. Thus, neither of the two cutting blades needs to be equipped with a position sensor to determine the closed position. It is evident that eliminating the use of a position sensor simplifies the product structure and reduces production costs.

[0010] A further embodiment is that the first mating groove includes a first portion extending from the distal end to the first proximal end and a second portion extending from the distal end to the second proximal end, with no obstruction between the first portion and the second portion.

[0011] As can be seen from the above, during the forward and reverse rotation of the first guide post, it needs to move along different directions in the first and second parts. If the first mating groove is designed to extend in a curved manner according to the trajectory line, it will create an obstruction between the first and second parts, which may cause interference and hinder the movement of the first guide post. Therefore, the first and second parts are connected to solve the above-mentioned interference problem.

[0012] A further proposed solution is that the distance from the first limiting part to the first axis is greater than the distance from the second limiting part to the first axis, thus forming a step between the first limiting part and the second limiting part.

[0013] As can be seen from the above, since there is a difference between the distance from the first limiting part to the first axis and the distance from the second limiting part to the first axis, and the first guide post may deviate due to the influence of the component force when it contacts the surface of the second limiting part, it may not be able to achieve a very stable state, which will also affect the accuracy of the motor current magnitude judgment. Therefore, a step position is formed by utilizing the difference in axial distance between the first limiting part and the second limiting part. The two angled surfaces of the step position can effectively restrict the first guide post, which is more conducive to the force of the first guide post being directed towards the first axis.

[0014] The second objective of this invention is to provide a paper cutting assembly for a printer, comprising a first cutter, a second cutter, a motor, and a drive disk. The motor drives the drive disk to rotate around a second axis. The drive disk includes a first guide post and a second guide post located in different circumferential directions around the second axis. The first guide post can drive the first cutter to rotate, and the second guide post can drive the second cutter to rotate. One of the first and second cutters is a full cutter, and the other is a half cutter. The first cutter uses the aforementioned cutter, and the first guide post engages with a first mating groove. When the motor drives the drive disk to rotate in a first direction, it forces the first cutter to reach a first closed position, while the first guide post reaches a first proximal end and engages with a first limiting part at the upper limit in the first direction. When the motor drives the drive disk to rotate in a second direction, it forces the first cutter to reach a limit open position, while the first guide post reaches a second proximal end and engages with a second limiting part at the upper limit in the second direction.

[0015] A further embodiment is that the second cutter includes a second cutter section and a second drive arm located at different circumferential positions on its own rotation axis. The second drive arm is provided with a second mating groove, and the second mating groove forms an entrance at the end opposite to the first axis. When the motor drives the drive disc to rotate around the second direction, it can force the second guide post to enter the second mating groove through the entrance and drive the second cutter. When the first cutter is in the extreme open position, the second cutter is in the second closed position.

[0016] As can be seen from the above scheme, when the first guide post and the second limiting part cooperate, the second cutting blade is exactly in the closed position. At this time, the first guide post is restricted, and the motor torque and current both increase. Thus, whether the cutting blade is in the fully closed position or the partially closed position, the result can be determined based on the motor current value. Furthermore, the cooperation between the first guide post and the first mating groove forces the cutting blade to return to the open position. Therefore, neither cutting blade needs a position sensor to determine the closed position. It is evident that eliminating the use of a position sensor simplifies the product structure and reduces production costs.

[0017] A further embodiment includes a guide block located at a circumferential position on the drive disk at the second axis; when the motor drives the drive disk to rotate around the first direction, the guide block abuts against the second drive arm and forces the second cutter to rotate toward the second opening position.

[0018] As can be seen from the above, when the drive disk rotates to a certain position along the first direction, the guide block will push the second cutter to rotate to the second opening position. In this way, the second cutter does not need to be equipped with a spring reset, nor does it need to be equipped with a position sensor to determine the opening position, further simplifying the product structure and reducing production costs.

[0019] Another further option is that when the first guide post and the first limiting part are engaged in upper limit cooperation in the first direction, the contact direction between the first guide post and the first limiting part is radial to the first axis; and / or, when the first guide post and the second limiting part are engaged in upper limit cooperation in the second direction, the contact direction between the first guide post and the second limiting part is radial to the first axis.

[0020] As can be seen from the above, this setting can ensure that the first guide post applies force to the first axis of the first cutter, avoiding the component force causing the first cutter to wobble and affecting the contact stability, which in turn affects the motor current value and the accuracy of the detection results.

[0021] Another further embodiment is that the paper cutting assembly also includes a semi-cutting blade holder that cooperates with the semi-cutting blade; the semi-cutting blade holder includes a support surface facing the semi-cutting blade, and at least two paper-receiving blade-avoiding grooves are provided on the support surface at intervals along the extension direction of the blade of the semi-cutting blade, the paper-receiving blade-avoiding grooves being recessed into the support surface.

[0022] As can be seen from the above, the semi-cutting effect requires a high cutting depth accuracy, but the semi-cutting blade has manufacturing or assembly errors, which in turn affect the semi-cutting effect and completely cut the paper. In the process of the semi-cutting blade of this technical solution cooperating with the non-flat support surface, no matter how large the blade error or how small the cutting gap is, the paper will be at least partially hidden in the paper-holding blade avoidance groove after being subjected to the blade pressure and will not be cut. In this way, the bottom paper can be guaranteed not to be cut and the effectiveness of the semi-cutting action can be guaranteed.

[0023] The printer provided by the third objective of this invention includes the paper cutting assembly of the printer described above.

[0024] The fourth objective of this invention is to provide a printer control method for controlling the aforementioned printer. The control method includes: when a first paper cutting command is received, controlling the motor to rotate forward to drive the drive disk to rotate in a first direction; when the current value of the motor reaches a first preset value, controlling the motor to stop rotating; when a second paper cutting command is received, controlling the motor to rotate in reverse to drive the drive disk to rotate in a second direction; when the current value of the motor reaches a second preset value, controlling the motor to stop rotating.

[0025] As can be seen from the above scheme, when the first guide post and the second limiting part cooperate, the second cutting blade is exactly in the closed position. At this time, the first guide post is restricted and is performing paper cutting, which will cause the motor torque and current to rise in a certain regular manner. In this way, whether the cutting blade is in the full or half position, whether it has reached the closed position can be determined based on the motor current value. This eliminates the need for a position sensor, simplifies the product structure, and reduces production costs. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the paper cutting assembly in the half-cut state according to the first embodiment of the present invention.

[0027] Figure 2 This is a structural diagram showing the process state of the first embodiment of the paper cutting assembly of the present invention.

[0028] Figure 3 This is a structural diagram of the half-cutting component in the first embodiment of the paper cutting component of the present invention.

[0029] Figure 4 This is a partially enlarged view of the first drive arm in the first embodiment of the paper cutting assembly of the present invention.

[0030] Figure 5 This is a structural diagram of the full-cutting component in the first embodiment of the paper cutting component of the present invention.

[0031] Figure 6 This is a partially enlarged view of the second drive arm in the first embodiment of the paper cutting assembly of the present invention.

[0032] Figure 7 This is a structural diagram of the drive disk in the first embodiment of the paper cutting assembly of the present invention.

[0033] Figure 8 This is a schematic diagram illustrating the operational principle of the semi-cutting component cooperating with the drive disk in the first embodiment of the paper cutting component of the present invention.

[0034] Figure 9 This is a schematic diagram illustrating the operational principle of the full-cutting component and the drive disk in the first embodiment of the paper cutting component of the present invention.

[0035] Figure 10 This is a partially enlarged view of the half-cutting blade and half-cutting blade holder in the first embodiment of the paper cutting assembly of the present invention.

[0036] Figure 11 This is a partially enlarged view of the first drive arm in the second embodiment of the paper cutting assembly of the present invention. Detailed Implementation

[0037] First embodiment of paper cutting assembly See Figure 1 and Figure 2 The printer claimed in this invention includes the paper cutting assembly of this embodiment. The paper cutting assembly includes a drive assembly 1, a drive disk 2, a half-cutting blade 3, a full-cutting blade 4, a half-cutting blade holder 5, a full-cutting blade holder 6, a torsion spring 7, and a base 8. The drive assembly 1 includes a motor 11 and a gear set 12. The motor 11, gear set 12, and drive disk 2 are all mounted on the base 8. The motor 11, gear set 12, and drive disk 2 are sequentially driven, so that a forward-rotating motor 11 can drive the drive disk 2 to rotate in a first direction, and a reverse-rotating motor 11 can drive the drive disk 2 to rotate in a second direction. Figure 2 From the perspective shown, the first direction is clockwise, and the second direction is counterclockwise. In this embodiment, motor 11 is a stepper motor.

[0038] See Figure 3 The semi-cutting blade holder 5 is fixedly installed, and the semi-cutting blade 3 is rotatably installed around the first axis 39. This allows the semi-cutting blade 3 to open and close relative to the semi-cutting blade holder 5, thereby cutting the paper. The semi-cutting blade 3 mainly includes a first drive arm 31 and a first cutting part 32. The first cutting part 32 and the first drive arm 31 are located at different circumferential positions of the first axis 39. A semi-cutting blade 321 is installed on the first cutting part 32. In this embodiment, the extension direction of the first drive arm 31 is approximately 90 degrees from the extension direction of the semi-cutting blade 321.

[0039] See Figure 4 Importantly, in this invention, the first drive arm 31 is provided with a first mating groove 30, and the first mating groove 30 is based on a curved trajectory line 300. The trajectory line 300 is actually the trajectory line of the movement of the first guide post 21 on the drive disk 2 within the first mating groove 30 under the rotation of the drive disk 2 and the swing of the first drive arm 31.

[0040] The trajectory line 300 begins at the first proximal end 300a, passes through the distal end 300c, turns back, and ends at the second proximal end 300b. Both the first proximal end 300a and the second proximal end 300b are closer to the first axis 39 than the distal end 300c. The first proximal end 300a is provided with a first limiting portion 303, and the second proximal end 300b is provided with a second limiting portion 304. The first mating groove 30 includes a first portion 301 extending from the distal end 300c to the first proximal end 300a and a second portion 302 extending from the distal end 300c to the second proximal end 300b. Generally, the mating groove formed according to the trajectory line 300 extends in an approximately "U"-shaped curve, consistent with the trajectory line 300 (e.g., ...). Figure 11 In the second embodiment of the printer shown, the first mating groove 90, the first part and the second part are separated, with only the distal ends connected. However, in this embodiment, the first mating groove 30 does not have an obstruction between the first part 301 and the second part 302, such as... Figure 4 As shown, the first portion 301 and the second portion 302 of the first mating groove 30 are connected, and the distance from the first limiting portion 303 to the first axis 39 is greater than the distance from the second limiting portion 304 to the first axis 39, forming a step 305 between the first limiting portion 303 and the second limiting portion 304. Furthermore, the first driving arm 31 has an opening in the first mating groove 30 that connects to the distal end 300c. In this embodiment, both the first limiting portion 303 and the second limiting portion 304 are planar and parallel to each other, but not coplanar.

[0041] See Figure 5 The full-cutting blade holder 6 is fixedly installed, and the full-cutting blade 4 is rotatably installed around the third axis 49. This allows the full-cutting blade 4 to open and close relative to the full-cutting blade holder 6, thereby cutting paper. The full-cutting blade 4 mainly includes a second drive arm 41 and a second cutting blade part 42. The second cutting blade part 42 and the second drive arm 41 are located at different circumferential positions on the third axis 49. In this embodiment, the extension direction of the second drive arm 41 is approximately 90 degrees to the extension direction of the second cutting blade part 42. The edge of the second cutting blade part 42 and the edge of the second blade holder 61 on the full-cutting blade holder 6 are both bladed.

[0042] See Figure 6 The second drive arm 41 is provided with a second mating groove 40. The second mating groove 40 has an inlet 408 at one end away from the first axis 39. The first abutment portion 401 and the second abutment portion 402 are formed on the two circumferential sides of the second mating groove 40, respectively. In addition, the entry direction of the second mating groove 40 is inclined to the extension direction of the second drive arm 41.

[0043] See Figure 7The drive disk 2 is rotatably arranged around the second axis 29. The drive disk 2 includes a disk body 20, a first guide post 21, a second guide post 22, a guide block 23, and a toothed portion 24. Axially, the toothed portion 24 is connected to the first side of the disk body 20, and the first guide post 21, the second guide post 22, and the guide block 23 are connected to the second side of the disk body 20.

[0044] In this embodiment, the first guide post 21 and the second guide post 22 both protrude from the edge of the disk body 20 along the axial direction of the second axis 29. The first guide post 21 and the second guide post 22 are spaced a certain distance apart in the circumferential direction of the drive disk 2, while the guide block 23 is fan-shaped around the second axis 29 and protrudes along the axial direction of the second axis 29. The guide block 23 forms a circumferential contact part.

[0045] More specifically, in this embodiment, the disk body 20 is configured as a cam shape, having a base circle and a protrusion. The first guide post 21 protrudes from the base circle of the disk body 20 along the axial direction of the second axis 29, and the second guide post 22 protrudes from the protrusion on the disk body 20 along the axial direction of the second axis 29. The first guide post 21 and the second guide post 22 are spaced a certain distance apart in the circumferential direction of the drive disk 2, and the fan-shaped portion of the guide block 23 is circumferentially away from the first guide post 21 and the second guide post 22 in the base circle.

[0046] In addition, in this embodiment, the first guide post 21 and the second guide post 22 have a height difference at their beginning and end along the axial direction of the drive disk 2. Mainly, based on the disk body 20, the height of the second guide post 22 is smaller than the height of the first guide post 21, thereby ensuring that the second guide post 22 will not extend to the first drive arm 31 during swinging and cause interference, thereby affecting the normal operation.

[0047] Mainly, the specific positions of the first guide post 21 and the second guide post 22 are determined according to the movement paths of the first mating groove 30 of the first drive arm 31 and the second mating groove 40 of the second drive arm 41, respectively. In other embodiments, the disk body can be circular, and the distances from the first guide post and the second guide post to the first axis can be equal.

[0048] See Figure 1 The first guide post 21 is always kept in the first mating groove 30. The torsion spring 7 is installed on the first drive arm 31. During a certain process, the front end of the first guide post 21 will squeeze the arm of the torsion spring 7.

[0049] Combination Figure 3 , Figure 4 , Figure 7 and Figure 8When the drive disk 2 rotates clockwise in the first direction, it can force the half-cutting blade 3 to reach the first closed position shown in state diagram a. During the process, the first guide post 21 moves from the far end 300c through the first part 301 to the first proximal end 300a. Finally, the first guide post 21 and the first limiting part 303 abut against each other radially along the first axis 39. Thus, the first guide post 21 is stopped from rotating and cannot continue to rotate. After the first guide post 21 is subjected to radial resistance, the pressure continues to increase until it reaches the limit. The current of the motor 11 reaches the preset value, and then the motor 11 stops driving.

[0050] Next, motor 11 reverses to drive drive disk 2 to rotate counterclockwise in the second direction. By setting the number of steps X for motor 11, drive disk 2 returns to the non-cutting state. During this process, the first guide post 21 moves from the distal end 300c through the second part 302 to a position closer to the second proximal end 300b, and abuts against the upper inner wall of the first mating groove 30, pushing the first drive arm 31. Ultimately, this forces the semi-cutting blade 3 to reach the first open position in the process state between state a and state b. Furthermore, even if the motor step count is incorrect, when the semi-cutting blade 3 reaches the extreme open position shown in state b, the first guide post 21 at the second proximal end 300b abuts against the second limiting part 304 and the step part 305 and is restricted by the second limiting part 304, preventing it from continuing to rotate. Under mutual restriction, the semi-cutting blade 3 remains in this extreme open position. Thus, the first guide post 21 is stopped from rotating and cannot continue to rotate. After the first guide post 21 is subjected to radial resistance, the pressure continues to increase until it reaches the limit. The current of the motor 11 reaches the preset value, and then the motor 11 stops driving.

[0051] Combined Figure 9 In fact, when drive disk 2 is in Figure 8 The angle of state b shown, and the position of the half-cutting tool 3 at its limit opening, are shown in the following reference. Figure 9 In the middle d state view, the full-cutting component 4 is currently in the second closed position. See also... Figure 9 The reason for the state diagrams c and d is that, during the process of the drive disk 2 rotating in the second direction and forcing the half-cutting blade 3 to open, the second guide post 22 on the drive disk 2 also enters the second mating groove 40 from the inlet 408 and abuts against the second abutting part 402, causing the second drive arm 41 to swing down. Thus, the current value of the motor 11 at this time can be used to determine whether the full-cutting blade 4 has reached the second closed position.

[0052] See then in order Figure 9In the states d and c, the drive disk 2 can be controlled to rotate around the first direction to drive the full cutter 4 back to the second open position shown in the state c. During the process, the second guide post 22 of the drive disk 2 abuts against the first abutting part 401, causing the second drive arm 41 to swing upward. When the second drive arm 41 swings to a certain position, the drive disk 2 continues to rotate, and the circumferential abutting part of the guide block 23 will push up the second drive arm 41, thereby preventing the second drive arm 41 from rotating back and restricting it to the second open position.

[0053] As can be seen, when the first guide post 21 engages with the second limiting part 304 of the half-cutting blade 3, the cutter of the full-cutting blade 4 is exactly in the closed position. At this time, the first guide post 21 is restricted, and the torque and current of the motor 11 both increase. Thus, whether the full-cutting blade 4 or the half-cutting blade 3 has reached the closed position can be determined based on the current value of the motor 11. Furthermore, the engagement of the first guide post 21 with the first mating groove 30 forces the cutter to return to the open position. Therefore, neither cutter needs to be equipped with a position sensor to determine the closed position, nor does it need to be equipped with a position sensor to determine the open position. When the drive disk 2 rotates to a certain position along the first direction, the guide block 23 will push the full-cutting blade 4 to rotate to the second open position. Thus, the full-cutting blade 4 does not need to be equipped with a spring reset, nor does it need to be equipped with a position sensor to determine the open position. It can be seen that the present invention eliminates the use of a position sensor and a reset spring, which helps to simplify the product structure and reduce production costs.

[0054] See Figure 10 On the other hand, the semi-cutting blade holder 5 includes a support surface 520 facing the semi-cutting blade. The support surface 520 is provided with a plurality of paper-receiving and blade-avoiding grooves 521 arranged sequentially and at intervals along the blade extension direction of the semi-cutting blade 321 of the semi-cutting blade 3. The paper-receiving and blade-avoiding grooves 521 are recessed into the support surface 520. In this embodiment, the cross-section of the paper-receiving and blade-avoiding grooves 521 is square. Mainly, the semi-cutting effect requires high cutting depth accuracy, but the semi-cutting blade 321 may have manufacturing or assembly errors, which can affect the semi-cutting effect and completely cut the paper. During the interaction between the semi-cutting blade 321 and the non-flat support surface 520, regardless of the size of the error of the semi-cutting blade 321 or the size of the cutting gap, at least a portion of the paper will be hidden within the paper-receiving and blade-avoiding grooves 521 after being subjected to blade pressure, thus ensuring that the bottom paper is not cut and ensuring the effectiveness of the semi-cutting action.

[0055] Printer control method embodiment The printer control method is used to control the printer of the present invention described above. The control method includes: When the first paper-cutting command is received, the motor 11 is controlled to rotate forward to drive the drive disk 2 to rotate in the first direction. When the current value of the motor 11 reaches the first preset value, the motor 11 is controlled to stop rotating. More specifically, the first paper-cutting command is a half-cutting command. After the motor 11 is controlled to rotate forward to drive the drive disk 2 to rotate in the first direction, the half-cutting blade 3... Figure 8 The paper cutting is completed when the paper changes from state b to state a. Finally, the first guide post 21 is stopped from rotating and cannot continue to rotate due to the contact between the first guide post 21 and the first limiting part 303. The pressure on the first guide post 21 continues to increase until it reaches the limit. At this time, it is determined that the current of the motor 11 has reached the first preset value, and the motor 11 is then controlled to stop working. The half-cutting action is completed at this time.

[0056] When the second paper-cutting command is received: the control motor 11 reverses to drive the drive disk 2 to rotate in the second direction; when the current value of the motor 11 reaches the second preset value, the control motor 11 stops rotating. More specifically, the second paper-cutting command is a full-cut command, after the control motor 11 reverses to drive the drive disk 2 to rotate in the second direction, the full-cutting blade 4... Figure 9 The paper is cut by changing from state c to state d. Figure 8 Finally, with the first guide post 21 abutting against the second limiting part 304, the first guide post 21 is stopped from rotating and cannot continue to rotate. The pressure on the first guide post 21 continues to increase until it reaches its limit. At this time, it is determined that the current of the motor 11 has reached the second preset value, and then the motor 11 is controlled to stop working. At this time, the full cutting action is completed.

[0057] Furthermore, the control method also includes: after the step of controlling the motor 11 to rotate forward to drive the drive disk 2 to rotate in the first direction when the first paper cutting command is received, and controlling the motor 11 to stop rotating when the current value of the motor 11 reaches the first preset value, it further includes: when the current of the motor 11 reaches the first preset value for a preset time, controlling the motor 11 to reverse according to a preset number of steps to drive the drive disk 2 to rotate in the second direction. This step realizes that the half-cutting blade 3 opens to the first opening position. Thus, the present invention also realizes the determination of the half-cutting opening position by the number of steps of the motor 11, further reducing the setting of a position sensor and simplifying the product structure.

[0058] Furthermore, the control method also includes: after the step of controlling the motor 11 to reverse and drive the drive disk 2 to rotate in the second direction when the second paper cutting command is received, and controlling the motor 11 to stop rotating when the current value of the motor 11 reaches the second preset value, it further includes: when the current of the motor 11 reaches the second preset value for a preset time, controlling the motor 11 to rotate forward according to a preset number of steps to drive the drive disk 2 to rotate in the first direction. This step realizes that the full-cutting blade 4 opens to the second opening position. Thus, the present invention also realizes the judgment of the full-cutting opening position by controlling the number of steps of the motor 11, further reducing the setting of a position sensor and simplifying the product structure.

[0059] Furthermore, the "guide post" in this invention is not limited to the outline structure of a column; any protruding structure that can mate with the mating groove is within the protection scope of this invention.

[0060] Second embodiment of paper cutting assembly See Figure 11 And compare Figure 4 Unlike the first embodiment, in this embodiment, the first drive arm 9 forms a barrier arm 91 between the first part 901 and the second part 902. This makes the first mating groove 90 provided on the first drive arm 9 bend and extend according to the trajectory line. More specifically, the first part 901 and the second part 902 of the first mating groove 90 are connected in an approximately "U" shaped bend.

[0061] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A printer cutter component that rotates around a first axis, the cutter component including a first cutter portion and a first drive arm located at different circumferential positions of the first axis, the first drive arm being provided with a first mating groove opened along a trajectory line; Its features are: The trajectory line begins at the first proximal end, passes through the distal end, turns back, and ends at the second proximal end. Both the first proximal end and the second proximal end are closer to the first axis than the distal end. The first proximal end is provided with a first limiting part, and the second proximal end is provided with a second limiting part; The printer includes a motor and a drive disk, the motor drives the drive disk to rotate around a second axis, and the drive disk includes a first guide post; The first mating groove is used to mate with the first guide post, the first limiting part is used to engage with the first guide post in a first direction to limit the current of the motor, and the second limiting part is used to engage with the first guide post in a second direction to limit the current of the motor.

2. The printer cutter according to claim 1, characterized in that: The first mating groove includes a first portion extending from the distal end to the first proximal end and a second portion extending from the distal end to the second proximal end, wherein the first mating groove has no obstruction between the first portion and the second portion.

3. The printer cutter according to claim 2, characterized in that: The distance from the first limiting part to the first axis is greater than the distance from the second limiting part to the first axis, and a step is formed between the first limiting part and the second limiting part.

4. A paper cutting assembly for a printer, comprising a first cutter, a second cutter, a motor, and a drive disk, wherein the motor drives the drive disk to rotate around a second axis, and the drive disk includes a first guide post and a second guide post located in different circumferential directions on the second axis, wherein the first guide post can drive the first cutter to rotate, and the second guide post can drive the second cutter to rotate, wherein one of the first cutter and the second cutter is a full cutter and the other is a half cutter; Its features are: The first cutting component is the cutting component described in any one of claims 1 to 3, and the first guide post is engaged with the first mating groove; When the motor drives the drive disc to rotate around the first direction, it can force the first cutter to reach the first closed position. At the same time, the first guide post reaches the first proximal end and cooperates with the first limiting part at the upper limit in the first direction. The first guide post is restricted, causing the current of the motor to change. When the motor drives the drive disc to rotate in the second direction, it can force the first cutter to reach the limit opening position. At the same time, the first guide post reaches the second proximal end and cooperates with the second limiting part at the upper limit in the second direction. The first guide post is restricted, causing the current of the motor to change.

5. The paper cutting assembly of the printer according to claim 4, characterized in that: The second cutter includes a second cutter portion and a second drive arm located at different circumferential positions on its own rotation axis. The second drive arm is provided with a second mating groove, and the second mating groove forms an entrance at the end opposite to the first axis. When the motor drives the drive disc to rotate in the second direction, it can force the second guide post to enter the second mating groove through the inlet and drive the second cutter. When the first cutter is in the maximum open position, the second cutter is in the second closed position.

6. The paper cutting assembly of the printer according to claim 5, characterized in that: The drive disk also includes a guide block located at a circumferential position on the second axis; When the motor drives the drive disc to rotate around the first direction, the guide block abuts against the second drive arm and forces the second cutter to rotate toward the second open position.

7. The paper cutting assembly of the printer according to any one of claims 4 to 6, characterized in that: When the first guide post and the first limiting part are in upper limit engagement in the first direction, the contact direction between the first guide post and the first limiting part is the radial direction of the first axis. And / or, When the first guide post and the second limiting part are engaged in the upper limit cooperation in the second direction, the contact direction between the first guide post and the second limiting part is the radial direction of the first axis.

8. The paper cutting assembly of the printer according to any one of claims 4 to 6, characterized in that: The paper cutting assembly also includes a half-cutting blade holder that cooperates with the half-cutting blade; The semi-cutting blade holder includes a support surface disposed toward the semi-cutting blade, and at least two paper-receiving blade-avoiding grooves are disposed on the support surface at intervals along the blade extension direction of the semi-cutting blade, and the paper-receiving blade-avoiding grooves are recessed into the support surface.

9. A printer, characterized in that, The paper cutting assembly of the printer as described in any one of claims 4 to 8 above.

10. A method for controlling a printer, characterized in that, Used to control the printer as described in claim 9; The control method includes: When the first paper cutting instruction is received: Control the motor to rotate forward so as to drive the drive disk to rotate along the first direction; When the current value of the motor reaches a first preset value, the motor is controlled to stop rotating; When the second paper cutting instruction is received: The motor is controlled to reverse so as to drive the drive disk to rotate in the second direction; When the current value of the motor reaches the second preset value, the motor is controlled to stop rotating.

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