An automatic positioning and cutting label printing device

Abstract

The application relates to the field of printer label cutting, and discloses an automatic positioning and cutting label printing device, which comprises a printer body, a label roll arranged in the printer body, and conveying components arranged in the printer body to help conveying the label roll; a pair of shaft supporting tables are arranged in the printer body; the automatic positioning and cutting label printing device further comprises cutting components, the cutting components comprise a cutter pad and a plurality of upper cutters provided with sawtooth edges; the upper cutters reciprocate up and down, and the cutter pad is used for cutting labels. Through the setting of a touch sensing part, the working upper cutters can be rotated and touched in cooperation with the switching components; through the setting of piezoelectric sensors equal in number to the upper cutter edges, the damage of the cutter edges can be quantified, and the controller is used for monitoring the damage of each passing upper cutter in real time, so that the subsequent timely replacement is facilitated; through the setting of automatic detection and automatic switching of the cutter edges, it can be ensured that the cutter edges of the upper cutters are intact each time, and the cutting effect of the printer is improved.

Description

Technical Field

[0001] This invention relates to the field of label cutting technology for printers, specifically to an automatic positioning and cutting label printing device. Background Technology

[0002] Printing equipment is an auxiliary device in the computer field, often used as a computer peripheral. It prints specific materials under the control of the computer. Existing label printing equipment can be divided into printing equipment that requires cutting and printing equipment that does not require cutting. The latter comes with pre-cut label rolls of equal length, while the former automatically cuts labels of different lengths according to actual needs.

[0003] Existing automatic label printing mechanisms require a serrated upper blade to cut the label for easy hand tearing. This blade repeatedly presses down to cut the label. However, the serrated upper blade experiences significantly greater pressure on its tip compared to a straight blade due to the constant pressure against the base. Damage to any of the serrated tips will severely compromise the tearability of the printed label rolls, making it difficult to periodically inspect the serrated upper blade for damage. Furthermore, replacing the upper blade in existing label printing equipment requires disassembling multiple structures, which is inconvenient and requires stopping the printing equipment, further complicating operation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic positioning and cutting label printing device, which solves the problem that the serrations of existing label printers are easily damaged during long-term use and are difficult to detect in time, leading to a decrease in the quality of printed labels.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic positioning and cutting label printing device, comprising a printer body, wherein the printer body contains a label roll and a conveying component to assist in conveying the label roll, and a pair of axis support tables are provided within the printer body. The device further includes: a cutting component, comprising upper blades with a blade pad and multiple upper blades with serrated edges, wherein the upper blades, during their reciprocating motion, cooperate with the blade pad to cut the label; and a switching component, comprising a switching roller, which is responsible for intermittently rotating the multiple upper blades to switch the upper blades. Location; a blade detection component, comprising a detection platform with multiple touch sensors corresponding one-to-one with the serrations of the upper blade, the touch sensors detecting the damage to the serrations of the upper blade by sensing pressure; a quick-release component, responsible for fixing and removing the upper blade; a pop-out component, comprising multiple elastic elements disposed within a switching roller, responsible for contacting the corresponding upper blade, and popping out the damaged upper blade through the elastic elements and in cooperation with the blade detection component; and a receiving component, responsible for receiving the popped upper blade so that it does not interfere with the operation of the cutting component.

[0006] Preferably, the blade detection component further includes a fixed box fixedly connected to the detection table, the touch sensor includes a rotating wheel and a movable frame rotatably connected thereto, and a piezoelectric sensor is provided inside the fixed box, the piezoelectric sensor being electrically connected to a controller.

[0007] Preferably, the switching component further includes a rotating shaft fixedly connected to the switching roller, and a reduction motor is fixedly connected to the end of the rotating shaft. The switching roller has multiple slots, and the upper blade is engaged in the corresponding slot.

[0008] Preferably, the quick-release component includes a pair of hollow shafts fixedly connected to the inner wall of the slot, a pin shaft slidably connected inside the hollow shaft, a beveled surface on the bottom surface of the pin shaft, mounting holes adapted to the pin shaft on both sides of the upper blade, and a reset component fixedly connected between the inner wall of the hollow shaft and the pin shaft.

[0009] Preferably, the ejector component further includes a first electromagnet fixedly connected to the bottom of the cavity shaft. The first electromagnet is electrically connected to the controller. When the first electromagnet is energized, the corresponding upper blade is ejected outward under the action of the elastic element in its contact connection.

[0010] Preferably, the storage component includes a storage tube, the bottom of which has a storage groove, and a magnetic suction element is fixedly connected to the inner wall of the storage groove to attract the ejected upper knife.

[0011] Preferably, a cleaning component is provided near the switching roller. The cleaning component includes a pair of cleaning cotton, which is responsible for clamping the outer side of the corresponding upper blade. An electric push rod is provided at the outer end of the cleaning cotton, which is responsible for controlling the clamping force of the cleaning cotton on the upper blade.

[0012] Preferably, the outer end of the electric push rod is provided with an electric guide rail, and a guide block is slidably connected on the electric guide rail, and the guide block is fixedly connected to the electric push rod.

[0013] Preferably, the cutting component includes a drive motor, and an eccentric wheel is fixedly connected to the output end of the drive motor. The eccentric wheel is responsible for driving the switching roller to move up and down.

[0014] Preferably, a movable shaft is fixedly connected to the end of the switching roller, a support frame is provided at the outer end of the movable shaft, a guide frame is slidably connected to the inner wall of the support frame, and the movable shaft is rotatably connected to the inside of the guide frame.

[0015] This invention provides an automatic positioning and cutting label printing device. It has the following beneficial effects:

[0016] 1. This invention, by setting a switching component and multiple detachable upper blades, can achieve the simultaneous assembly of multiple upper blades, and set the working time to switch the position of all upper blades, ensuring the quality of the upper blades during each cutting operation and reducing the cutting failure rate of the printer.

[0017] 2. By setting a touch sensor, the present invention can work in conjunction with the switching component to rotate and touch the upper blade after it has been used. By setting a piezoelectric sensor with the same number of blades as the upper blade, the damage of the blades can be quantified in a clever way. Then, the controller can monitor the damage of each upper blade in real time, which is convenient for timely replacement.

[0018] 3. By setting up a quick-release component, during installation, the upper blade is simply pushed into the slot, causing the pin shaft to contract under force, the reset component to contract, and the pin shaft to enter the mounting hole, thus achieving quick installation of the upper blade. At the same time, in conjunction with the blade detection component, the first electromagnet attracts the pin shaft, causing it to separate from the upper blade, and the elastic component helps the upper blade to disengage from the switching roller, thereby achieving the purpose of quickly disassembling the detected damaged upper blade.

[0019] 4. By setting up a storage component, the present invention can attract the ejected upper knife using the magnetic attraction of the storage component, which can effectively help separate the damaged upper knife from the switching roller without interfering with the normal operation and switching of the upper knife. When replacing the upper knife in the future, the damaged upper knife can be taken out simply by rotating the storage cylinder.

[0020] 5. This invention uses an electric push rod to press the cleaning cotton against the blade. Then, guided by the guide block, the electric push rod and the electric guide rail drive the cleaning cotton to slide on both sides of the blade, achieving the purpose of cleaning by removing dust and sludge.

[0021] 6. By setting automatic blade detection and automatic switching, it can be ensured that the upper blade is intact and undamaged in each operation, which improves the cutting effect of the printer. At the same time, the quick-release parts can be used to remove the damaged upper blade from the mechanism in time, so that the mechanism can continue to work normally for a period of time without human intervention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall external structure of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the printer body of the present invention;

[0024] Figure 3 This is a schematic diagram of the label roll and conveying component structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the switching component structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified structural diagram at point A;

[0027] Figure 6 This is a schematic diagram of the blade detection component of the present invention;

[0028] Figure 7 This is a schematic diagram of the cutting component structure of the present invention;

[0029] Figure 8 For the present invention Figure 7 A magnified structural diagram at point B;

[0030] Figure 9 This is a schematic diagram of the cross-sectional structure of the upper blade of the present invention;

[0031] Figure 10 This is a schematic diagram of the quick-release component structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the storage component structure of the present invention;

[0033] Figure 12 This is a schematic diagram of the internal structure of the cavity shaft of the present invention;

[0034] Figure 13 This is a schematic diagram of the internal structure of the fixing box of the present invention.

[0035] The components include: 1. Printer body; 2. Label roll; 3. Conveying component; 4. Cutting component; 41. Blade pad; 42. Upper blade; 43. Drive motor; 44. Eccentric wheel; 45. Movable shaft; 46. Support frame; 47. Guide frame; 48. First vertical frame; 5. Switching component; 51. Switching roller; 52. Rotary shaft; 53. Gear motor; 6. Blade detection component; 61. Detection table; 62. Touch sensor; 621. Rotary... 622. Wheel; 623. Movable frame; 624. Piezoelectric sensor; 63. Fixing box; 64. Second vertical frame; 7. Quick-release component; 71. Hollow shaft; 72. Pin shaft; 81. Elastic component; 82. First electromagnet; 9. Storage component; 91. Storage tube; 92. Magnetic component; 93. Third vertical frame; 10. Support platform; 11. Electric guide rail; 12. Guide block; 13. Electric push rod; 14. Cleaning cotton; 15. Fourth vertical frame. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see the appendix Figure 1 -Appendix Figure 4 This invention provides an automatic positioning and cutting label printing device, including a printer body 1. The printer body 1 internally houses a label roll 2 and a conveying component 3 to assist in conveying the label roll 2. The printer body 1 also includes a pair of shaft support tables. The device further includes: a cutting component 4, which comprises a blade pad 41 and multiple upper blades 42 with serrated edges. The blade pad 41 is made of hard rubber or polyurethane. During the reciprocating motion of the upper blades 42, they cooperate with the blade pad 41 to cut the labels; and a switching component 5, which includes a switching roller 51. The switching roller 51 is responsible for intermittently rotating the multiple upper blades 42, causing the upper blades 42 to switch positions. The blade detection component 6 includes a detection platform 61 with multiple touch sensors 62 corresponding to the serrations of the upper blade 42. The touch sensors 62 detect the damage to the serrations of the upper blade 42 by sensing pressure. A quick-release component 7 is responsible for fixing and removing the upper blade 42. A pop-out component includes multiple elastic elements 81 disposed within the switching roller 51, which abut against the corresponding upper blade 42, and pop out damaged upper blades 42 through the elastic elements 81 and in cooperation with the blade detection component 6. A receiving component 9 receives the popped-out upper blades 42 so that they do not interfere with the operation of the cutting component 4.

[0038] The printer body 1 includes a bottom shell and an upper shell, which are rotatably connected. A support platform 10 is fixedly connected to the bottom shell. The support platform 10 has a groove, and the blade pad 41 is located in the groove. The support platform 10 supports the label and allows it to move horizontally. A pair of shaft support platforms are slidably connected to the bottom surface of the bottom shell. When the user needs to replace the label roll 2, the upper shell can be opened and the new label roll 2 can be placed between the pair of shaft support platforms.

[0039] The cutting component 4 drives the upper blade 42 to reciprocate downwards to cut the label roll 2. Depending on the needs, it can be controlled to cut half or full. Half cutting only cuts the label face paper, while full cutting cuts both the label face paper and the backing paper. This case will be explained using full cutting as an example.

[0040] Please see the appendix Figure 1 -Appendix Figure 4 The conveying component 3 includes a first paper feeding roller and a second paper feeding roller. Both the first paper feeding roller and the second paper feeding roller are equipped with a drive motor and a pair of meshing drive gears. The drive motor is controlled by a controller to rotate. The drive gears make the first paper feeding roller and the second paper feeding roller rotate in opposite directions to achieve the purpose of conveying labels. The first paper feeding roller is located on one side of the cutting component 4, and the second paper feeding roller is located on the other side of the cutting component 4 and close to the label output port of the printer body 1.

[0041] Please see the appendix Figure 3-5 The cutting component 4 includes a drive motor 43, and an eccentric wheel 44 is fixedly connected to the output end of the drive motor 43. The eccentric wheel 44 is responsible for driving the switching roller 51 to move up and down.

[0042] When the drive motor 43 is turned on, the drive motor 43 drives the eccentric wheel 44 to rotate. The outer wall of the eccentric wheel 44 is in a squeezing relationship with the switching roller 51. The rotation of the eccentric wheel 44 drives the switching roller 51 to move up and down, so that the switching roller 51 carries the upper blade 42 located at the bottom to move down and cut the label until the cutting is completed. A sawtooth shape is formed on the end face of the label roll 2, which is then conveyed outward by the paper feeding roller.

[0043] Please see the appendix Figure 6 and attached Figure 13 The blade detection component 6 also includes a fixed box 63 fixedly connected to the detection platform 61. The touch sensor 62 includes a rotating wheel 621 and a movable frame 622 rotatably connected thereto. A piezoelectric sensor 623 is provided inside the fixed box 63. The piezoelectric sensor 623 is electrically connected to a controller. A second vertical frame 64 is fixedly connected to both ends of the detection platform 61. The second vertical frame 64 is fixedly connected to the support platform 10.

[0044] The movable frame 622 is slidably connected to the inside of the fixed box 63. The inner wall of the fixed box 63 is slidably connected to the pressure plate. The pressure plate is fixedly connected to the piezoelectric sensor 623. When the blade of the upper knife 42 hits the rotating wheel 621, the rotating wheel 621 rotates and moves downward. The pressure plate squeezes the piezoelectric sensor 623, so that the piezoelectric sensor 623 senses the instantaneous impact force and transmits it to the controller, so that the controller can detect whether each blade of the upper knife 42 is damaged and the degree of damage.

[0045] Please see the appendix Figure 7 The switching component 5 also includes a rotating shaft 52 fixedly connected to the switching roller 51. A reduction motor 53 is fixedly connected to the end of the rotating shaft 52. The switching roller 51 has multiple slots, and the upper blade 42 is engaged in the corresponding slot.

[0046] The end of the switching roller 51 is fixedly connected to a movable shaft 45, and a support frame 46 is provided at the outer end of the movable shaft 45. A guide frame 47 is slidably connected to the inner wall of the support frame 46, and the movable shaft 45 is rotatably connected to the inside of the guide frame 47.

[0047] The support frame 46 is fixedly connected to the inner bottom surface of the bottom shell. The bottom surface of the drive motor 43 is fixedly connected to the first U-shaped rod (not shown in the figure). The first U-shaped rod is fixedly connected to the outer end of the support frame 46. When the drive motor 43 is turned on, it drives the eccentric wheel 44 to rotate. The eccentric wheel 44 abuts against the guide frame 47. Since the movable shaft 45 is rotatably connected to the inside of the guide frame 47, the eccentric wheel 44 will drive the guide frame 47 and the upper blade 42 to descend.

[0048] Please see the appendix Figure 5 The bottom of the support frame 46 is fixedly connected to the first vertical frame 48, which is fixedly connected to the groove. The inner wall of the support frame 46 is fixedly connected to the bottom plate, and a strong spring is fixedly connected between the bottom plate and the guide frame 47. When the eccentric wheel 44 rotates upward, the switching roller 51 moves upward under the action of the strong spring.

[0049] This case sets up four upper blades 42, namely one working upper blade 42 and three spare upper blades 42, with the blade pads 41 of each working upper blade 42 in a vertical relationship.

[0050] The geared motor 53 is electrically connected to the controller. The controller can set the geared motor 53 to start intermittently, so that the drive motor 43 switches once every set working time (e.g., 15-30 minutes) or the output end of the drive motor 43 rotates a set number of times (e.g., 500-1000 times). At this time, the output end of the geared motor 53 rotates 90 degrees, rotating the originally standby upper blade 42 to the bottom, while the upper blade 42 that was always working rotates to the right, waiting for its blade to be detected later.

[0051] Please see the appendix Figure 9-10 The quick-release component 7 includes a pair of hollow shafts 71 fixedly connected to the inner wall of the slot. A pin shaft 72 is slidably connected inside the hollow shaft 71. The bottom surface of the pin shaft 72 is provided with an inclined surface. The two sides of the upper blade 42 are provided with mounting holes adapted to the pin shaft 72. A reset component, which is a reset spring, is fixedly connected between the inner wall of the hollow shaft 71 and the pin shaft 72.

[0052] During installation, simply push the upper blade 42 into the slot, causing the pin shaft 72 to contract under force, the reset member to contract, and the pin shaft 72 to enter the mounting hole. At this time, the elastic member 81 is in a compressed and stored state, and the upper blade 42 has been installed.

[0053] Please see the appendix Figure 12The pop-out component also includes a first electromagnet 82 fixedly connected to the bottom of the cavity shaft 71. The first electromagnet 82 is electrically connected to the controller. When the first electromagnet 82 is energized, the corresponding upper knife 42 is ejected outward under the action of the elastic member 81 connected to it. The elastic member 81 is a pressure spring or elastic silicone. In this case, a pressure spring is used as an example.

[0054] The controller sends a signal to the corresponding first electromagnet 82, causing the corresponding first electromagnet 82 (that is, the first electromagnet 82 above) to attract the pin shaft 72, causing the pin shaft 72 to retract and disengage from the damaged upper blade 42. After the upper blade 42 loses the limit of the pin shaft 72, it moves outward under the action of the elastic element 81.

[0055] Please see the appendix Figure 11 The storage component 9 includes a storage tube 91, with a storage groove at the bottom of the storage tube 91. A magnetic suction element 92 is fixedly connected to the inner wall of the storage groove to attract the ejected upper knife 42. A rotating shaft 52 is fixedly connected to both ends of the storage tube 91. A third vertical frame 93 is rotatably connected to one end of the rotating shaft 52. The third vertical frame 93 is fixedly connected to the inner bottom surface of the bottom shell. An anti-slip rotating sleeve is fixedly sleeved on the rotating shaft 52.

[0056] The magnetic component 92 specifically consists of a second electromagnet and a thin iron plate. In this case, there are multiple second electromagnets in two rows, with each row of second electromagnets connected to a thin iron plate. The storage slot is V-shaped and adapted to the upper blade 42. The thin iron plate is fixedly connected to the storage slot, so that a pair of thin iron plates form a magnetic attraction area, which attracts the popped upper blade 42, thereby replacing the damaged upper blade 42 and removing it from the switching roller 51, preventing it from continuing to work, and without interfering with the continued operation of other upper blades 42.

[0057] The printer body 1 is equipped with an alarm light on its exterior. When the alarm light is on, it will remind the staff that there is a problem with the blade 42. When the staff notices the alarm light, they can choose to replace the blade 42. Even if the staff does not notice it in time, the printer body 1 can continue to work for a period of time.

[0058] Please see the appendix Figure 7-8 A cleaning component is provided near the switching roller 51. The cleaning component includes a pair of cleaning cotton 14. The cleaning cotton 14 is made of microfiber dust-free cloth. The pair of cleaning cotton 14 is responsible for clamping the outer side of the corresponding upper blade 42. An electric push rod 13 is provided at the outer end of the cleaning cotton 14, which is responsible for controlling the clamping force of the cleaning cotton 14 on the upper blade 42.

[0059] Because the label has an adhesive layer for sticking, some adhesive residue will inevitably adhere to it every time the upper blade 42 cuts. Over time, this adhesive residue will cover the blade of the upper blade 42, which will not only stick to the label surface during cutting, but also directly affect the cutting effect of the upper blade 42.

[0060] An electric guide rail 11 is provided at the outer end of the electric push rod 13. A guide block 12 is slidably connected to the electric guide rail 11. The guide block 12 is fixedly connected to the electric push rod 13. The cleaning cotton 14 is detachably connected to the end of the electric push rod 13 and can be replaced periodically. A fourth vertical frame 15 is fixedly connected to both ends of the electric guide rail 11. The fourth vertical frame 15 is fixedly connected to the inner bottom surface of the bottom shell.

[0061] Both the electric guide rail 11 and the electric push rod 13 are electrically connected to a controller and operate intermittently. When cleaning is about to begin, the electric push rod 13 is activated, which presses the cleaning cotton 14 tightly against the blade. Then, guided by the guide block 12, the electric push rod 13 drives the electric guide rail 11 to slide the cleaning cotton 14 on both sides of the blade of the upper blade 42, achieving the purpose of cleaning by removing dust and sludge.

[0062] The complete working principle of this case is as follows:

[0063] Installation process: Open the upper shell and place the new label roll 2 between a pair of shaft support tables; then insert multiple upper blades 42 into the slots, causing the pin shaft 72 to contract under force, the reset member to contract, and the pin shaft 72 to enter the mounting hole. At this time, the elastic member 81 is in a compressed and stored state, and the upper blades 42 are easily installed.

[0064] Cutting process: Turn on the drive motor 43, drive motor 43 drives the eccentric wheel 44 to rotate, the eccentric wheel 44 abuts against the guide frame 47, the switching roller 51 rotates on the guide frame 47 through the movable shaft 45, using the rotation of the eccentric wheel 44 to drive the switching roller 51 to move up and down, so that the switching roller 51 carries the upper blade 42 located at the bottom to move down and cut the label until the cutting is completed, forming a serrated shape on the end face of the label roll 2.

[0065] Conveying process: The drive motor is rotated by the controller, and the drive gear makes a pair of first and second paper feeding rollers rotate in opposite directions to convey the label. A pair of paper feeding rollers are located on one side of the cutting part 4, pulling the label roll 2 to rotate. After cutting, another pair of paper feeding rollers are located at the label outlet of the printer body 1 to convey the cut label outward.

[0066] Tool changing process: The controller can be set to start the geared motor 53 intermittently, so that the drive motor 43 switches once every set working time. The output end of the geared motor 53 rotates 90 degrees each time, rotating the originally spare upper tool 42 to the bottom, while the upper tool 42 that was always working rotates to the right, waiting for its cutting edge to be detected later.

[0067] Detection process: When the blade of the upper blade 42 strikes the rotating wheel 621, the rotating wheel 621 rotates and moves downwards, pressing the piezoelectric sensor 623 through the pressure plate, so that the piezoelectric sensor 623 senses the instantaneous impact force and transmits it to the controller, so that the controller can detect whether each blade of the upper blade 42 is damaged and the degree of damage; at the same time, the upper blade 42 that has no problems is rotated to the top normally, waiting to continue working.

[0068] Disassembly process: When a damaged upper blade 42 is detected, the controller sends a signal to the corresponding first electromagnet 82, causing the first electromagnet 82 to attract the pin shaft 72, causing the pin shaft 72 to retract and disengage from the damaged upper blade 42. After the upper blade 42 loses the limit of the pin shaft 72, it moves outward under the action of the elastic element 81. The magnetic suction element 92 and the thin iron plate form a magnetic suction area, which attracts the popped upper blade 42 up, causing it to disengage from the switching roller 51 and preventing it from continuing to work. Subsequently, the storage cylinder 91 can be flipped over to take out the damaged upper blade 42.

[0069] Cleaning process: When the upper blade 42 is found to be undamaged and can continue to work, the upper blade 42 rotates to the left. The controller causes the electric guide rail 11 and the electric push rod 13 to work intermittently. When it is time to start cleaning, the electric push rod 13 is turned on, which presses the cleaning cotton 14 against the blade. Then, under the guidance of the guide block 12, the electric push rod 13 drives the electric guide rail 11 to slide the cleaning cotton 14 on both sides of the blade of the upper blade 42, achieving the purpose of cleaning dust and removing sludge.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic positioning and cutting label printing device, comprising a printer body (1), wherein a label roll (2) is disposed inside the printer body (1), characterized in that, Also includes: The cutting component (4) includes a blade pad (41) and multiple upper blades (42) with serrated edges. During the reciprocating motion of the upper blades (42), they work with the blade pad (41) to cut the label. The switching component (5) includes a switching roller (51), which is responsible for intermittently rotating multiple upper blades (42) to switch the position of the upper blades (42); The blade detection component (6) includes a detection platform (61), on which multiple touch sensors (62) are provided that correspond one-to-one with the serrations of the upper blade (42). The touch sensors (62) detect the damage to the serrations of the upper blade (42) by sensing pressure. Quick-release component (7), which is responsible for fixing and disassembling the upper blade (42); The pop-out component includes multiple elastic elements (81) disposed in the switching roller (51), which are responsible for contacting the corresponding upper blade (42) and popping out the damaged upper blade (42) through the elastic elements (81) and in conjunction with the blade detection component (6). The receiving component (9) is responsible for receiving the ejected upper blade (42) so that it does not interfere with the operation of the cutting component (4).

2. The automatic positioning and cutting label printing device according to claim 1, characterized in that, The blade detection component (6) also includes a fixed box (63) fixedly connected to the detection table (61). The touch sensor (62) includes a rotating wheel (621) and a movable frame (622) rotatably connected thereto. A piezoelectric sensor (623) is provided inside the fixed box (63), and the piezoelectric sensor (623) is electrically connected to a controller.

3. The automatic positioning and cutting label printing device according to claim 2, characterized in that, The switching component (5) also includes a rotating shaft (52) fixedly connected to the switching roller (51). A speed reduction motor (53) is fixedly connected to the end of the rotating shaft (52). Multiple slots are provided on the switching roller (51), and the upper blade (42) is engaged in the corresponding slot.

4. The automatic positioning and cutting label printing device according to claim 3, characterized in that, The quick-release component (7) includes a pair of hollow shafts (71) fixedly connected to the inner wall of the slot. A pin shaft (72) is slidably connected inside the hollow shaft (71). The bottom surface of the pin shaft (72) is provided with an inclined surface. The two sides of the upper blade (42) are provided with mounting holes that are adapted to the pin shaft (72). A reset component is fixedly connected between the inner wall of the hollow shaft (71) and the pin shaft (72).

5. The automatic positioning and cutting label printing device according to claim 4, characterized in that, The ejector component also includes a first electromagnet (82) fixedly connected to the bottom of the cavity shaft (71). The first electromagnet (82) is electrically connected to the controller. When the first electromagnet (82) is energized, the corresponding upper blade (42) is ejected outward under the action of the elastic member (81) it is in contact with.

6. The automatic positioning and cutting label printing device according to claim 5, characterized in that, The storage component (9) includes a storage tube (91), the bottom of which is provided with a storage groove, and a magnetic suction component (92) is fixedly connected to the inner wall of the storage groove, which is responsible for adsorbing the popped-out upper knife (42).

7. The automatic positioning and cutting label printing device according to claim 6, characterized in that, A cleaning component is provided near the switching roller (51). The cleaning component includes a pair of cleaning cotton (14). The pair of cleaning cotton (14) is responsible for clamping the outer side of the corresponding upper blade (42). An electric push rod (13) is provided at the outer end of the cleaning cotton (14), which is responsible for controlling the clamping force of the cleaning cotton (14) on the upper blade (42).

8. The automatic positioning and cutting label printing device according to claim 7, characterized in that, An electric guide rail (11) is provided at the outer end of the electric push rod (13), and a guide block (12) is slidably connected on the electric guide rail (11). The guide block (12) is fixedly connected to the electric push rod (13).

9. An automatic positioning and cutting label printing device according to claim 1, characterized in that, The cutting component (4) includes a drive motor (43), and an eccentric wheel (44) is fixedly connected to the output end of the drive motor (43). The eccentric wheel (44) is responsible for driving the switching roller (51) to move up and down.

10. An automatic positioning and cutting label printing device according to claim 9, characterized in that, The end of the switching roller (51) is fixedly connected to a movable shaft (45), and a support frame (46) is provided at the outer end of the movable shaft (45). A guide frame (47) is slidably connected to the inner wall of the support frame (46), and the movable shaft (45) is rotatably connected to the inside of the guide frame (47).

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