A machine core and thermal printer for solving stuck knife

Abstract

The utility model provides a kind of mechanism and thermal printer of carding solution carding, including fixed base, separator, lock catch device, thermosensitive sheet, rubber roll, cutter device and trigger module, cutter device includes moving knife, moving knife driving device, fixed knife, fixed knife elastic member and fixed knife driving device, fixed knife elastic member exerts elastic pressure on fixed knife, fixed knife driving device is provided with driving part and driven part, lock catch device includes pull lever, pull lever is connected with lock catch arm and drives lock catch arm rotation, the rotation of pull lever also drives driven part rotation, driving part is connected with fixed knife and drives fixed knife to move away from moving knife;Lock catch device is provided with trigger part, the rotation of pull lever also drives trigger part and trigger module separation. Three key actions are realized by simple operation, the problem that it is difficult to open cover and cutter cannot be separated when carding is solved, complex troubleshooting process is simplified into a simple one-handed operation action, greatly improve user experience and equipment maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of thermal printing technology, and in particular to a mechanism for resolving blade jamming and a thermal printer. Background Technology

[0002] With the widespread application of thermal printing technology, it has been widely used in the warehousing and logistics industry as well as in the printing of receipts and in other fields. Thermal printers include thermal transfer printers that use the principle of thermal transfer with a ribbon, and thermal printers that use thermal paper for thermal imaging. After thermal printing, the printed paper is output for users. Thermal printers are widely used in the printing of receipts and labels in retail, logistics, medical and financial fields because of their fast printing speed, low noise and durable printhead.

[0003] As a core component of thermal printers, the cutter is used to cut the printed paper. Common cutter devices include moving blades and fixed blades. During normal paper cutting, the moving blade moves toward the fixed blade under the drive of the drive device, forming a shearing action with the fixed blade to cut the paper.

[0004] However, in actual use, due to reasons such as excessively thick paper, foreign objects, worn cutter blades, or jamming mechanisms, the moving blade may not be able to retract smoothly from the fixed blade after cutting the paper, resulting in a "blade jamming" malfunction. Once a blade jamming occurs, the moving and fixed blades are locked together, not only preventing the printer from printing again, but more seriously, when the user needs to open the printer for cleaning or troubleshooting, the cutting mechanism is usually located on the fixed base and the separable separator, and forcibly opening the separator will be obstructed by the locked moving and fixed blades, making operation extremely difficult.

[0005] In existing technologies, resolving tool jamming issues typically requires intervention from professional repair personnel using specialized tools. This process is cumbersome and almost impossible for ordinary users to handle themselves, severely impacting the user experience and normal operation of the equipment. Therefore, a mechanism structure is needed that can conveniently and quickly resolve tool jamming issues, especially facilitating user self-unlocking in emergency situations. Utility Model Content

[0006] The primary objective of this invention is to provide a mechanism for resolving tool jamming by actuation.

[0007] The second objective of this invention is to provide a thermal printer having the aforementioned mechanism.

[0008] To achieve the first objective of this utility model, it provides a mechanism for resolving knife jamming by actuation, comprising a fixed base, a separating body, a locking device, a thermal sheet, and a rubber roller. The thermal sheet is disposed on the fixed base, and the rubber roller is rotatably disposed on the separating body. The fixed base has mounting grooves at both ends of the thermal sheet along the paper width direction. One axial end of the rubber roller is located in one of the mounting grooves. The locking device is rotatably hinged to the fixed base and includes a locking elastic element, a connecting member, and locking arms disposed on both sides of the connecting member. The locking arms have locking grooves at the mounting grooves, and the locking grooves have locking openings. The axial end is located within the locking grooves. The locking elastic element connects the locking device and the fixed base, and applies an elastic locking force towards the axial end to the locking groove. The mechanism also includes a cutting device and a trigger module. The cutting device includes... The device includes a moving blade, a moving blade drive device, a fixed blade, a fixed blade elastic element, and a fixed blade drive device. A trigger module, the moving blade, and the moving blade drive device are mounted on a fixed base. The fixed blade, the fixed blade elastic element, and the fixed blade drive device are mounted on a separating body. The moving blade drive device drives the moving blade to move towards the fixed blade along the paper-cutting direction. The fixed blade elastic element connects the fixed blade and the separating body, applying an elastic holding force towards the moving blade along the holding direction. The fixed blade drive device has a driving part and a driven part, which rotate synchronously. The locking device includes a lever connected to a locking arm and driving the locking arm to rotate. The rotation of the lever also drives the driven part to rotate. The driving part is connected to the fixed blade and drives the fixed blade to move away from the moving blade. The locking device has a trigger part, and the rotation of the lever also drives the trigger part to separate from the trigger module.

[0009] A further proposed solution is that the fixed-blade drive device includes a first rotating shaft, a drive lever, and a driven lever. The drive lever and the driven lever are connected by the first rotating shaft. The drive lever is located on the side of the fixed blade closer to the moving blade, the drive part is located on the drive lever, and the driven part is located on the driven lever.

[0010] A further proposed solution is to arrange the first rotating shaft along the paper width direction, with the driving lever located inside the driven lever based on the paper width direction.

[0011] A further proposed solution is that the fixed blade drive device includes two drive levers, which are respectively arranged at the two ends of the first rotating shaft in the paper width direction, and the two drive parts respectively cooperate with the two ends of the fixed blade in the paper width direction.

[0012] A further proposed solution is to use a spring as the elastic element for the fixed blade, with the spring arranged along the pressing direction and connected between the fixed blade and the separating body.

[0013] A further approach is to cut the paper in a direction perpendicular to the pressing direction.

[0014] A further embodiment is that the locking device includes an actuating member, which is connected to and drives the locking arm on one side to rotate. An actuating lever is provided on the actuating member, and the actuating member is also provided with an actuating part. The actuating part cooperates with the driven part, and the rotation of the actuating part drives the driven part to rotate.

[0015] A further proposed solution is to use a torsion spring as the locking elastic element, a lever with a shaft hole, and a second rotating shaft as the connecting element. The axial end of the second rotating shaft is connected to the shaft hole, and the torsion spring is sleeved outside the axial end of the second rotating shaft. One end of the torsion spring is connected to the lever, and the other end of the torsion spring is connected to the fixed base.

[0016] A further proposed solution is to place the trigger on the latch arm, with the trigger located on one side of the lock groove and the trigger module located on one side of the mounting groove.

[0017] To achieve the second objective of this utility model, this utility model provides a thermal printer, including the mechanism described above.

[0018] The beneficial effects of this utility model are that it integrates the function of solving the blade jamming problem with the normal opening and closing mechanism of the machine core. Users only need to simply operate the same lever to simultaneously achieve three key actions: First, it releases the lock to separate the rubber roller. By driving the locking arm to rotate, the locking groove disengages from the axial end of the rubber roller, allowing the separator to separate from the fixed seat. Second, it forcibly separates the fixed blade. By operating the lever, the driven part of the fixed blade drive device is activated, overcoming the holding force of the fixed blade's elastic element and actively pushing the fixed blade away from the moving blade, directly releasing the jamming state between the moving and fixed blades. Third, it triggers a blade retraction signal. By operating the lever, the trigger part separates from the trigger module, sending a signal to the printer's control system. This can control the moving blade drive device to perform reverse operation or a reset operation, driving the moving blade to actively retract. The almost simultaneous execution of these three operations fundamentally solves the problems of difficulty in opening the cover and the inability to separate the cutting blade when jammed, simplifying the complex troubleshooting process into a simple one-handed operation, greatly improving user experience and equipment maintenance efficiency.

[0019] The fixed blade drive device in this case forms a lever system through a first rotating shaft, a drive lever, and a driven lever, which accurately converts the rotational motion of the locking device into the linear movement of the fixed blade. In particular, the use of two drive levers acting on the two ends of the fixed blade respectively ensures that the fixed blade is subjected to balanced forces during movement, preventing skewness and jamming, making the operation more reliable. It is not only compact in structure but also reliable in linkage.

[0020] Furthermore, by forcibly separating the fixed blade and triggering the retraction of the moving blade before opening the cover, this design avoids secondary damage such as blade chipping, drive mechanism damage, or plastic part breakage that may occur if the user forcibly pries open the separation body while the blade is stuck. This effectively protects the core components of the machine mechanism, extends the service life of the equipment, and improves the safety and operational reliability of the entire thermal printer product. Attached Figure Description

[0021] Figure 1 This is a structural diagram of an embodiment of the thermal printer of this utility model.

[0022] Figure 2 This is a structural diagram of an embodiment of the thermal printer of this utility model with the side cover open.

[0023] Figure 3 This is a structural diagram of an embodiment of the thermal printer of this utility model with the front cover open.

[0024] Figure 4 This is a structural diagram of an embodiment of the movement of this utility model.

[0025] Figure 5 This is a partial structural diagram of the thermal printer embodiment of this utility model located at the lever in the closed state.

[0026] Figure 6 This is an exploded view of the mounting base in an embodiment of the thermal printer of this utility model.

[0027] Figure 7 This is a structural diagram of the separator in an embodiment of the thermal printer of this utility model.

[0028] Figure 8 This is a cross-sectional view of the thermal printer embodiment of this utility model located at the lever in the separated state.

[0029] Figure 9 This is a cross-sectional view of the thermal printer embodiment of this utility model located at the drive lever in the separated state.

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0031] Reference Figures 1 to 9 The thermal printer includes a core 2, a base 11, a front cover 12, and a side cover 14. The base 11 has a paper tray 13, and the paper tray 13 has a paper shaft that extends along the paper width direction Y. The end of the paper shaft has a positioning hole. The front cover 12 is connected to the front end of the base 11, and a paper outlet 10 is formed between the front cover 12 and the base 11. The side cover 14 is connected to one side of the base 11 and covers the outside of the paper tray 13. The side cover 14 has a positioning post in the middle, and when the side cover 14 is closed, the positioning post engages with the positioning hole.

[0032] The mechanism 2 includes a fixed base 3, a separating body 4, a locking device 5, a thermal sheet 31, and a rubber roller 41. The thermal sheet 31 is mounted on the fixed base 3, and the rubber roller 41 is rotatably mounted on the separating body 4. The fixed base 3 has mounting grooves 32 at both ends of the thermal sheet 31 in the paper width direction Y. One axial end of the rubber roller 41 is located in a mounting groove 32. The locking device 5 is rotatably hinged to the fixed base 3. The locking device 5 includes a locking elastic element 53, a connecting element 546, and locking arms 541 on both sides of the connecting element 546. The locking arms 541 have locking grooves 542 at the mounting grooves 32, and the locking grooves 542 have locking openings.

[0033] The fixed seat 3 is fixedly mounted on the base 11 and located above the paper outlet 10. The separator 4 is mounted on the front cover 12 and located above the paper outlet 10. When the front cover 12 is closed, the axial end of the rubber roller 41 is located in the locking groove 542. The locking elastic element 53 is connected between the locking device 5 and the fixed seat 3. The locking elastic element 53 applies an elastic locking force to the locking groove 542 toward the axial end of the rubber roller 41.

[0034] The mechanism 2 also includes a cutting device and a trigger module 547. The cutting device includes a moving blade 33, a moving blade drive device, a fixed blade 42, a fixed blade elastic element 421, and a fixed blade drive device 56. The trigger module 547, the moving blade 33, and the moving blade drive device are mounted on the fixed base 3, while the fixed blade 42, the fixed blade elastic element 421, and the fixed blade drive device 56 are mounted on the separating body 4. The moving blade drive device can be a rotary motor, and through the transmission of a worm gear and a cam, the moving blade drive device and the moving blade 33 can be connected. Next, the moving blade drive device drives the moving blade 33 to move towards the fixed blade 42 along the paper cutting direction. The moving blade 33 is located outside the fixed blade 42 based on the holding direction Z. The fixed blade elastic element 421 is connected between the fixed blade 42 and the separating body 4. The fixed blade elastic element 421 can be made of multiple springs, which are arranged along the holding direction Z and connected between the fixed blade 42 and the separating body 4. The fixed blade elastic element 421 applies an elastic holding force to the fixed blade 42 along the holding direction towards the moving blade 33. The paper cutting direction X is perpendicular to the holding direction Z.

[0035] The fixed blade drive device 56 includes a first rotating shaft 565, two drive levers 561 and a driven lever 563. The first rotating shaft 565 is arranged along the paper width direction Y and connected to the separator 4. The two drive levers 561 are respectively arranged at two ends of the first rotating shaft 565 based on the paper width direction Y. The drive levers 561 and the driven levers 563 are driven and connected through the first rotating shaft 565. The drive levers 561 are located on one side of the driven levers 563, inside the paper width direction Y.

[0036] The drive lever 561 is located on the side of the fixed blade 42 near the moving blade 33. The drive lever 561 is provided with a drive part 562, and the driven lever 563 is provided with a driven part 564. The drive part 562 and the driven part 564 rotate synchronously. The two drive parts 562 respectively cooperate with the two ends of the fixed blade 42 based on the paper width direction Y.

[0037] The locking device 5 includes an actuating member 51, which is provided with an actuating rod 511, a shaft hole 514, an actuating part 512, and an actuating protrusion 513. The actuating rod 511 and the actuating part 512 are located on the outer periphery of the shaft hole 514. The actuating rod 511 is arranged in a rod shape, the actuating part 512 is arranged in a protrusion shape, and the actuating protrusion 513 extends along the paper width direction Y. The actuating member 51 is connected to the locking arm 541 on one side and drives the locking arm 541 to rotate.

[0038] One of the locking arms 541 is provided with a through hole 544, a drive hole 543 and a trigger part 545. The drive hole 543, the locking groove 542 and the trigger part 545 are located on the outer periphery of the through hole 544. The connecting member 546 adopts a second rotating shaft, which is arranged along the paper width direction Y. The through hole 544 is used for the second rotating shaft to pass through. The axial end of the second rotating shaft is connected to the shaft hole 514. The drive hole 543 is connected to the lever protrusion 513. The trigger part 545 is arranged in a plate shape. The lever part 512 is used to cooperate with the driven part 564. The rotation of the lever part 512 drives the driven part 564 to rotate.

[0039] The locking elastic element 53 is a torsion spring, and the connecting element 546 is a second rotating shaft. The axial end of the second rotating shaft is connected to the shaft hole 514. The torsion spring is sleeved outside the axial end of the second rotating shaft. One end of the torsion spring is connected to the lever 51, and the other end of the torsion spring is connected to the fixed seat 3. The torsion spring applies an elastic locking force to the locking groove 542 toward the axial end of the rubber roller 41.

[0040] Reference Figure 5 With the cover 12 in the closed state and in normal printing and paper cutting mode, the moving blade 33 can engage with the fixed blade 42 for cutting, as shown in the reference. Figure 8 and Figure 9 If a jam occurs, the rotating lever 511 can be turned. The lever 511 is connected to the locking arm 541 and drives the locking arm 541 to rotate. The rotation of the lever 511 also drives the trigger part 545 to rotate. The rotation of the trigger part 545 also drives the driven part 564 to rotate. The driving part 562 is connected to the fixed knife 42 and drives the fixed knife 42 to move away from the moving knife 33 along the holding direction Z. At the same time, since the trigger part 545 is located on one side of the locking groove 542 and the trigger module 547 is located on one side of the mounting groove 32, the rotation of the lever 511 also drives the trigger part 545 to separate from the trigger module 547.

[0041] When a blade jam occurs, the user can simultaneously perform three key actions by simply moving the lever. First, it releases the latch to separate the rubber roller. By driving the latch arm to rotate, the locking groove disengages from the axial end of the rubber roller, allowing the separator to separate from the fixed base. Second, it forcibly separates the fixed blade. By moving the lever, the driven part of the fixed blade drive device is activated, overcoming the holding force of the fixed blade's elastic element and actively pushing the fixed blade away from the moving blade, directly releasing the jamming state between the moving and fixed blades. Third, it triggers a blade retraction signal. By moving the lever, the trigger part separates from the trigger module, sending a signal to the printer's control system. This signal can control the moving blade drive device to reverse or reset, actively retracting the moving blade. The near-synchronous execution of these three operations fundamentally solves the problems of difficulty in opening the cover and the inability to separate the cutting blade when the blade is jammed, simplifying the complex troubleshooting process into a simple one-handed operation, greatly improving user experience and equipment maintenance efficiency.

[0042] Of course, the above embodiments are only preferred embodiments of this case. In other embodiments, the lever and the locking arm on one side can be integrally formed. For the arrangement of the elastic element, in addition to the above embodiments, springs, torsion springs, tension springs, or other devices with elastic reset functions can be used as needed to achieve elastic reset and elastic holding of the locking arm and the fixed blade. In addition, for the drive lever to drive the fixed blade, in addition to using a stable pressing drive at both ends, it can also be located at other positions of the fixed blade to achieve pressing drive of the fixed blade, so as to achieve separation of the fixed blade and the moving blade. In addition to using a mechanical trigger switch, the trigger module can also use a light trigger switch. In addition to being used in the above-mentioned embedded thermal printer, the above mechanism can also be used in desktop thermal printers or thermal transfer printers, and can also be used in handheld thermal printers.

Claims

1. A mechanism for resolving knife jamming by actuation, comprising a fixed base, a separating body, a locking device, a thermal sheet, and a rubber roller, wherein the thermal sheet is disposed on the fixed base, the rubber roller is rotatably disposed on the separating body, the fixed base is provided with mounting grooves at both ends of the thermal sheet in the paper width direction, one axial end of the rubber roller is located in one of the mounting grooves, the locking device is rotatably hinged to the fixed base, the locking device comprising a locking elastic element, a connecting member, and locking arms disposed on both sides of the connecting member, the locking arms being provided with locking grooves at the mounting grooves, the locking grooves having locking openings, the axial end being located in the locking grooves, the locking elastic element being connected between the locking device and the fixed base, the locking elastic element applying an elastic locking force toward the axial end to the locking grooves; Its features are: The mechanism also includes a cutting device and a trigger module. The cutting device includes a moving blade, a moving blade drive device, a fixed blade, a fixed blade elastic element, and a fixed blade drive device. The trigger module, the moving blade, and the moving blade drive device are disposed on the fixed base. The fixed blade, the fixed blade elastic element, and the fixed blade drive device are disposed on the separating body. The moving blade drive device drives the moving blade to move toward the fixed blade along the paper cutting direction. The fixed blade elastic element is connected between the fixed blade and the separating body. The fixed blade elastic element applies an elastic holding force to the fixed blade along the holding direction toward the moving blade. The fixed blade drive device is provided with a driving part and a driven part. The driving part and the driven part rotate synchronously. The locking device includes a lever, which is connected to the locking arm and drives the locking arm to rotate. The rotation of the lever also drives the driven part to rotate. The driving part is connected to the fixed blade and drives the fixed blade to move away from the moving blade. The locking device is provided with a trigger part, and the rotation of the lever also drives the trigger part to separate from the trigger module.

2. The movement according to claim 1, characterized in that: The fixed-blade driving device includes a first rotating shaft, a driving lever, and a driven lever. The driving lever and the driven lever are drivenly connected through the first rotating shaft. The driving lever is located on the side of the fixed blade closer to the moving blade. The driving part is located on the driving lever, and the driven part is located on the driven lever.

3. The movement according to claim 2, characterized in that: The first rotating shaft is arranged along the paper width direction, and the driving lever is located inside the driven lever based on the paper width direction.

4. The movement according to claim 3, characterized in that: The fixed blade driving device includes two driving levers, which are respectively arranged at two ends of the first rotating shaft based on the paper width direction, and the two driving parts respectively cooperate with the two ends of the fixed blade based on the paper width direction.

5. The movement according to claim 1, characterized in that: The fixed blade elastic element is a spring, which is arranged along the pressing direction and connected between the fixed blade and the separating body.

6. The movement according to claim 5, characterized in that: The paper cutting direction is perpendicular to the pressing direction.

7. The movement according to any one of claims 1 to 6, characterized in that: The locking device includes an actuating member, which is connected to and drives the locking arm on one side to rotate. An actuating lever is disposed on the actuating member, and the actuating member is also provided with an actuating part, which cooperates with the driven part. The rotation of the actuating part drives the driven part to rotate.

8. The movement according to claim 7, characterized in that: The locking elastic element is a torsion spring, the lever is provided with a shaft hole, the connecting element is a second rotating shaft, the axial end of the second rotating shaft is connected to the shaft hole, the torsion spring is sleeved outside the axial end of the second rotating shaft, one end of the torsion spring is connected to the lever, and the other end of the torsion spring is connected to the fixed base.

9. The movement according to any one of claims 1 to 6, characterized in that: The trigger part is disposed on the latch arm, the trigger part is located on one side of the lock groove, and the trigger module is located on one side of the mounting groove.

10. A thermal printer, characterized in that, Includes the movement as described in any one of claims 1 to 9 above.

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