A paper feed passage height adjusting device of a label printer

Abstract

This application discloses a paper feed path height adjustment device for a label printer. The adjustment device includes an upper housing, a lower housing, an upper pressure plate, a lower pressure plate, a height adjustment mechanism, an elastic reset mechanism, a multi-stage push cam mechanism, a toggle lever mechanism, a toggle adjustment mechanism, a toggle limit mechanism, and a paper feed path. This application uses the toggle adjustment mechanism to drive the toggle lever mechanism to generate displacement, thereby rotating the multi-stage push cam mechanism. The multi-stage push cam mechanism uses the stepped change of its outer contour to press down on the height adjustment mechanism, causing the height adjustment mechanism to overcome the resistance of the elastic reset mechanism and rotate along the hinge point of the upper housing, thereby driving the upper pressure plate to rise and fall to change the width of the paper feed path. This application transforms the rotation operation into a smooth mechanical lifting motion, which not only broadens the printer's compatibility with label papers of different thicknesses, but also avoids transmission jamming during the adjustment process through the physical cooperation of the cam and lever, enhancing the reliability of the overall machine operation and the adaptability of consumables.

Description

Technical Field

[0001] This application relates to the field of printer technology, and in particular to a paper feed path height adjustment device for a label printer. Background Technology

[0002] Most thermal label printers on the market today use a fixed paper feed path and sensor pressure plate height design, which means the equipment can only adapt to label paper media of a fixed thickness. With the increasing diversification of label paper types (such as thin paper, thick paper, multi-layer composite paper, etc.), the traditional fixed-height paper feed path can hardly meet the actual printing needs. This not only leads to a decrease in the accuracy of sensor brightness when switching between media of different thicknesses, but also affects the positioning accuracy of the print head at the edge of the label paper, ultimately resulting in difficulty in guaranteeing print quality. Summary of the Invention

[0003] In order to improve the shortcomings of the existing label printers with fixed paper feed path height, which leads to poor media adaptability, this application provides a paper feed path height adjustment device for label printers.

[0004] The paper feed path height adjustment device for a label printer provided in this application adopts the following technical solution: A paper feed path height adjustment device for a label printer includes an upper housing, a lower housing connected to the upper housing, an upper pressure plate movably connected to the upper housing, a lower pressure plate hinged to the lower housing and corresponding to the upper pressure plate, height adjustment mechanisms respectively disposed on both sides of the upper housing and hinged to the upper housing, an elastic reset mechanism inserted between the upper housing and the height adjustment mechanism, a multi-stage push cam mechanism rotatably connected to the upper housing and press-fitting with the height adjustment mechanism, a toggle lever mechanism fixedly connected to the multi-stage push cam mechanism and extending in a direction away from the multi-stage push cam mechanism, a toggle adjustment mechanism connected to the upper housing and located above the toggle lever mechanism, and a toggle limiting mechanism located below the toggle lever mechanism. The height adjustment mechanism is hinged at its end to the upper pressure plate. A paper passage is provided between the upper pressure plate and the lower pressure plate. The toggle adjustment mechanism is used to toggle the toggle lever mechanism, so that the multi-stage push cam mechanism pushes the height adjustment mechanism to rotate around the hinge position with the upper housing as the axis of rotation, thereby moving the upper pressure plate to adjust the width of the paper passage.

[0005] By adopting the above technical solution, the toggle adjustment mechanism drives the toggle lever mechanism to generate displacement, thereby driving the multi-stage push cam mechanism to rotate. The multi-stage push cam mechanism uses the stepped change of the outer contour to press down the height adjustment mechanism, so that the height adjustment mechanism overcomes the resistance of the elastic reset mechanism and flips along the hinge point of the upper shell, driving the upper pressure cardboard to rise and fall to change the width of the paper passage. This application transforms the rotation operation into a smooth mechanical lifting motion, which not only broadens the printer's compatibility with label paper of different thicknesses, but also avoids transmission jamming during the adjustment process through the physical cooperation of the cam and the lever, enhancing the reliability of the whole machine operation and the adaptability of consumables.

[0006] Preferably, the height adjustment mechanism includes an adjustment mechanism body, a hinged flange connected to the adjustment mechanism body and hinged to the upper housing, a pressing side edge connected to the adjustment mechanism body and used for pressing and engaging with the multi-stage push cam mechanism, an adjustment push part connected to the adjustment mechanism body and used for rotatably connecting with the upper edge of the upper pressure plate, and a reset pushing side edge connected to the adjustment mechanism body and located below the hinged flange; the upper housing is provided with a reset baffle, and the elastic reset mechanism is located between the reset pushing side edge and the reset baffle.

[0007] By adopting the above technical solution, the multi-stage push cam mechanism presses the top pressure side edge downward, causing the adjustment mechanism body to deflect with the hinged convex edge as the fulcrum. One end of the adjustment mechanism body pushes the upper pressure cardboard downward through the adjustment push part, while the other end presses the elastic reset mechanism against the reset baffle through the reset push side edge for compression and energy storage. When the multi-stage push cam mechanism removes the external force, the elastic reset mechanism releases stress and pushes back the reset push side edge, causing the adjustment mechanism body to reverse and lift the upper pressure cardboard upward. This application maintains the smoothness of the height adjustment mechanism's operation during the pressure and unloading stages through the lever transmission principle and elastic rebound mechanism, and increases the mechanical stability of the paper feeding channel during height switching.

[0008] Preferably, the upper pressure plate is provided with a movable protrusion, and the upper housing is provided with a guide strip-shaped through hole. The movable protrusion passes through the guide strip-shaped through hole and is movably inserted into the adjustment and pushing part.

[0009] By adopting the above technical solution, when the adjusting push part is displaced by force, the pushing and pulling power is transmitted to the moving protrusion, so that the moving protrusion slides linearly along the channel direction under the physical inner wall constraint of the guide strip through hole, thereby pulling the upper pressing cardboard to complete the lifting action synchronously; the guiding and cooperating structure of this application limits the movement trajectory boundary of the upper pressing cardboard, reduces the lateral interference component of the height adjustment mechanism in the flipping transmission stage, avoids spatial deviation of the upper pressing cardboard, and reduces the label paper deviation and jamming failure in the dynamic conveying process.

[0010] Preferably, the multi-stage push cam mechanism includes a cam body and a pressing boss connected to the outer wall of the cam body. The cam body is provided with a plurality of pressing bosses, which are arranged in an array along the periphery of the cam body. The distance between the end face of the plurality of pressing bosses and the axis of the cam body increases progressively.

[0011] By adopting the above technical solution, when the cam body is driven to rotate, the top pressing bosses with different radial dimensions take turns entering the working position and abutting against the top pressing side edge, thereby outputting different depths of downward pressing displacement according to the set rotation angle; the design mode of the outer contour of this application gradually changes the continuous rotation drive action into multiple discrete pushing strokes, realizing step-by-step adjustment of the top pressing side edge, while enhancing the mechanical positioning stability of the transmission structure.

[0012] Preferably, the height adjustment mechanism further includes a limiting magnetic suction part inserted on the top pressing side edge, and the multi-stage push cam mechanism further includes a boss magnetic suction part inserted on the top pressing boss and used to magnetically engage with the limiting magnetic suction part.

[0013] By adopting the above technical solution, when the multi-stage push cam mechanism rotates to the preset position and the top pressure boss fits against the top pressure side edge, the limiting magnetic attraction part and the boss magnetic attraction part are spatially aligned and form a flexible lock through opposite polarity magnetic attraction; when the external driving force exceeds the magnetic attraction threshold, the lock is released and adjustment continues; the magnetic self-locking mechanism of this application automatically provides anti-vibration and anti-interference holding force after the channel height is adjusted to the correct position, reducing the risk of displacement and sudden changes in paper feed gap caused by vibration of the multi-stage push cam mechanism during high-frequency machine operation.

[0014] Preferably, the toggle adjustment mechanism includes a toggle drive assembly connected to the inner sidewall of the upper housing, a toggle assembly disposed on the outer sidewall of the upper housing and connected to the output end of the toggle drive assembly, and a rotary toggle plate fixedly connected to the toggle assembly; the toggle lever mechanism includes a toggle lever body connected to the cam body, and a toggle protrusion connected to the end of the toggle lever body, the toggle protrusion being used to press against the rotary toggle plate.

[0015] By adopting the above technical solution, when the toggle drive assembly is running, it drives the rotating toggle plate to rotate synchronously and uses the edge to push the toggle protrusion, causing the toggle lever body to undergo angular displacement, thereby directly introducing the rotational torque into the cam body; this application uses the transmission method of direct pushing on the surface of the rotating component to reduce the number of intermediate mechanical connection links, reduce the assembly complexity of the transmission mechanism, simplify the overall assembly level, and improve the response time of torque transmission.

[0016] Preferably, the toggle lever mechanism further includes a toggle magnetic attraction component inserted into the toggle protrusion, and the toggle adjustment mechanism further includes an adjustment magnetic attraction component inserted into the rotating toggle plate and used to magnetically engage with the toggle magnetic attraction component.

[0017] By adopting the above technical solution, when the rotating toggle plate approaches the toggle protrusion and performs pushing transmission, the adjusting magnetic attraction component and the toggle magnetic attraction component enter the magnetic field range and attract each other. The magnetic force constrains the toggle protrusion and the rotating toggle plate to remain in close contact throughout the entire synchronous angular displacement process, and maintains the adsorption state without physical separation after the power is interrupted. This magnetic flexible connection of the present application retains a small amount of slip compensation space between the power output part and the force-bearing part, reduces the transmission gap in conventional contact fit, reduces the mechanical impact noise generated during reciprocating adjustment, and improves the running smoothness and structural reliability of the power transmission stage.

[0018] Preferably, the toggle limiting mechanism includes a limiting drive assembly connected to the inner side wall of the upper housing, a limiting assembly disposed on the outer side wall of the upper housing and connected to the output end of the limiting drive assembly, and a rotating limiting plate fixedly connected to the limiting assembly.

[0019] By adopting the above technical solution, the toggle limit mechanism can not only work with the rotating toggle plate to clamp the toggle protrusion, but also push the toggle protrusion back to its original position. The bidirectional control design of this application not only realizes the stable locking of the paper feeding channel adjustment position and prevents the structure from loosening due to external force, but also performs active reset, which improves the structural stability and operational reliability of the height adjustment device.

[0020] Preferably, the upper pressure plate and the lower pressure plate are respectively provided with a width detection mechanism for detecting the width of the paper passage, and the width detection mechanism is electrically connected to the toggle drive assembly and the limit drive assembly respectively.

[0021] By adopting the above technical solution, the width detection mechanism is used to monitor the width parameters of the paper passage formed by the upper and lower pressure plates in real time. When label paper of different thicknesses is introduced into the paper passage, the width detection mechanism is used to trigger the rotation of the toggle drive component to complete the adaptive adjustment of the height of the paper passage, and then trigger the operation of the limit drive component to physically block and lock the toggle protrusion. This application reduces the cumbersome steps of manually identifying consumable specifications and manually intervening in mechanical adjustments, and improves the compatibility and adaptability of the printing equipment for diverse media specifications.

[0022] Preferably, the toggle assembly is provided with a quick-release through hole for the output end of the toggle drive assembly to be movably inserted, and the inner sidewall of the toggle assembly is provided with insertion toggle grooves arranged in an array along the periphery of the toggle assembly and communicating with the quick-release through hole. The toggle adjustment mechanism further includes an insertion flange connected to the output end of the toggle drive assembly and used for axial insertion into the insertion toggle slot, a quick-release card holder connected to the upper housing, a quick-release push-pull tube connected to the side wall of the toggle assembly and one end sleeved on the outer side wall of the output end of the toggle drive assembly, a pull-out rotating handle connected to the other end of the quick-release push-pull tube, and an end cap inserted into the quick-release card holder and located on one side of the pull-out rotating handle; the quick-release card holder is provided with a push-pull through hole, the other end of the quick-release push-pull tube is movably inserted into the push-pull through hole, and the end cap is threadedly engaged with the outer opening end of the push-pull through hole.

[0023] By adopting the above technical solution, when encountering a paper jam, the operator loosens the end cap to release the limit, pulls the rotating handle outward to drive the quick-release push-pull tube and the actuating component to slide axially, causing the insertion actuating slot to disengage from the insertion protrusion, thereby physically blocking the power link; then, the operator manually rotates the rotating handle to guide the actuating adjustment mechanism back to its position, and by adjusting the magnetic force combination of the magnetic suction component and the actuating magnetic suction component, the rotating actuating plate pulls the actuating protrusion to move in coordination and open the paper passage; this application reduces the difficulty of cleaning up consumables in confined spaces, shortens the equipment troubleshooting and daily downtime cycle, and improves the convenience of maintenance under abnormal operating conditions.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The toggle adjustment mechanism drives the lever mechanism to generate displacement, which in turn drives the multi-stage push cam mechanism to rotate. The multi-stage push cam mechanism uses the stepped change of the outer contour to press down the height adjustment mechanism, so that the height adjustment mechanism overcomes the resistance of the elastic reset mechanism and flips along the hinge point of the upper shell, driving the upper pressure cardboard to rise and fall to change the width of the paper passage. This application transforms the rotation operation into a smooth mechanical lifting motion, which not only broadens the printer's compatibility with label paper of different thicknesses, but also avoids transmission jamming during the adjustment process through the physical cooperation of the cam and the lever, enhancing the reliability of the whole machine operation and the adaptability of consumables. 2. When the cam body is driven to rotate, the top pressing bosses with different radial dimensions take turns entering the working position and abutting against the top pressing side edge, thereby outputting different depths of downward pressing displacement according to the set rotation angle; the design mode of the outer contour of this application gradually changes the continuous rotation drive action into multiple discrete pushing strokes, realizing step-by-step adjustment for the top pressing side edge, while enhancing the mechanical positioning stability of the transmission structure. 3. When the multi-stage push cam mechanism rotates to the preset position and the top pressure boss is in contact with the top pressure side edge, the limiting magnetic attraction part and the boss magnetic attraction part are spatially aligned and form a flexible lock through opposite polarity magnetic attraction; when the external driving force exceeds the magnetic attraction threshold, the lock is released and adjustment continues; the magnetic self-locking mechanism of this application automatically provides anti-vibration and anti-interference holding force after the channel height is adjusted to the correct position, reducing the risk of displacement and sudden changes in paper feed gap caused by vibration of the multi-stage push cam mechanism during high-frequency machine operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of this application. Figure 1 .

[0026] Figure 2 for Figure 1 Enlarged view of section A.

[0027] Figure 3 This is an exploded view of the height adjustment mechanism, multi-stage push cam mechanism, and toggle adjustment mechanism in the embodiments of this application. Figure 1 .

[0028] Figure 4 This is an exploded view of the height adjustment mechanism, multi-stage push cam mechanism, and toggle adjustment mechanism in the embodiments of this application. Figure 2 .

[0029] Figure 5 This is a cross-sectional view of an embodiment of this application. Figure 1 .

[0030] Figure 6 This is a cross-sectional view of an embodiment of this application. Figure 2 .

[0031] Figure 7 This is a cross-sectional view of an embodiment of this application. Figure 3 .

[0032] Figure 8 This is a schematic diagram of the exploded structure of an embodiment of this application. Figure 2 .

[0033] Explanation of reference numerals in the attached figures: 1. Upper housing; 11. Paper feed channel; 12. Reset baffle; 13. Guide strip through hole; 14. Width detection mechanism; 2. Lower housing; 3. Upper pressure plate; 31. Moving flange; 32. Vertical plate; 33. Horizontal plate; 4. Lower pressure plate; 5. Height adjustment mechanism; 51. Adjustment mechanism body; 52. Hinge flange; 53. Top pressure side edge; 54. Adjustment push part; 55. Reset push side edge; 56. Limiting magnetic suction part; 6. Elastic reset mechanism; 7. Multi-stage push cam mechanism; 71. Cam body; 72. Top pressure boss; 73. Boss magnetic suction part; 8. Actuating lever mechanism; 81. Actuating lever body; 82. Actuating flange; 83. Actuating magnetic suction assembly; 9. Actuating adjustment mechanism; 91. Actuating drive assembly; 92. Actuating assembly; 93. Rotating actuating plate; 94. Adjusting magnetic suction assembly; 95. Inserting flange; 96. Paper jam quick-release seat; 97. Quick-release push-pull tube; 98. Pull-out rotating handle; 99. End cap; 921. Quick-release through hole; 922. Inserting actuating groove; 961. Push-pull through hole; 10. Actuating limit mechanism; 101. Limiting drive assembly; 102. Limiting assembly; 103. Rotating limit plate. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1 to 8 This application will be described in further detail.

[0035] This application discloses a paper feed path height adjustment device for a label printer. (Refer to...) Figure 1 A paper feed path height adjustment device for a label printer includes an upper housing 1, a lower housing 2 connected to the upper housing 1, an upper pressure plate 3 movably connected to the upper housing 1, a lower pressure plate 4 hinged to the lower housing 2 and corresponding to the upper pressure plate 3, height adjustment mechanisms 5 respectively disposed on both sides of the upper housing 1 and hinged to the upper housing 1, an elastic reset mechanism 6 inserted between the upper housing 1 and the height adjustment mechanism 5, a multi-stage push cam mechanism 7 rotatably connected to the upper housing 1 and press-fitting with the height adjustment mechanism 5, and a mechanism fixedly connected to the multi-stage push cam mechanism 7 and extending away from the multi-stage push cam mechanism 8. The moving cam mechanism 7 extends in the direction of the actuating lever mechanism 8, the actuating adjustment mechanism 9 is connected to the upper housing 1 and located above the actuating lever mechanism 8, and the actuating limiting mechanism 10 is located below the actuating lever mechanism 8; the end of the height adjustment mechanism 5 is hinged to the upper pressure plate 3, and a paper passage 11 is provided between the upper pressure plate 3 and the lower pressure plate 4. The actuating adjustment mechanism 9 is used to actuate the actuating lever mechanism 8, so that the multi-stage pushing cam mechanism 7 pushes the height adjustment mechanism 5 to rotate around the hinge position with the upper housing 1 as the axis of rotation, thereby moving the upper pressure plate 3 to adjust the width of the paper passage 11.

[0036] The application of this invention involves the toggle adjustment mechanism 9 applying an action to push the toggle lever mechanism 8 to undergo spatial displacement. The toggle lever mechanism 8 simultaneously drives the multi-stage push cam mechanism 7 to rotate. The multi-stage push cam mechanism 7 uses the change in its outer contour to press and push the height adjustment mechanism 5, forcing the height adjustment mechanism 5 to overcome the rebound force of the elastic reset mechanism 6 and rotate around the hinge position with the upper housing 1 as the rotation axis. When the height adjustment mechanism 5 rotates, it drives the connected upper pressure plate 3 to move synchronously, thus completing the adjustment and control of the width of the paper feeding channel 11. This invention realizes the function of converting rotary input into opening and closing lifting motion to change the paper pressure gap, meeting the printer's application requirements for paper feeding of different thicknesses of label paper, and improving the equipment's consumable compatibility range and mechanical transmission stability. The elastic reset mechanism 6 is preferably a spring; the upper housing 1 is symmetrically provided with a height adjustment mechanism 5, an elastic reset mechanism 6, a multi-stage push cam mechanism 7, a toggle lever mechanism 8, a toggle adjustment mechanism 9, and a toggle limit mechanism 10 on both sides.

[0037] Furthermore, such as Figure 2 As shown, the height adjustment mechanism 5 includes an adjustment mechanism body 51, a hinged flange 52 connected to the adjustment mechanism body 51 and hinged to the upper housing 1, a pressing side flange 53 connected to the adjustment mechanism body 51 and used for pressing and engaging with the multi-stage push cam mechanism 7, an adjustment push part 54 connected to the adjustment mechanism body 51 and used for rotatably connecting with the upper edge of the upper pressure plate 3, and a reset pushing side flange 55 connected to the adjustment mechanism body 51 and located below the hinged flange 52; a reset baffle 12 is provided on the upper housing 1, and an elastic reset mechanism 6 is located between the reset pushing side flange 55 and the reset baffle 12.

[0038] The multi-stage push cam mechanism 7 of this application applies a pressing force to the pressing side edge 53, driving the adjustment mechanism body 51 to rotate and deflect around the hinged convex edge 52 as the fulcrum. The adjustment push part 54 pushes the upper pressure cardboard 3 downward and moves accordingly. At the same time, the reset pushing side edge 55 squeezes the elastic reset mechanism 6 and causes the elastic reset mechanism 6 to abut against the reset baffle 12 to generate energy storage deformation. When the multi-stage push cam mechanism 7 removes the pressing force, the elastic reset mechanism 6 releases the rebound stress and pushes the reset pushing side edge 55 in the opposite direction, driving the adjustment mechanism body 51 to rotate in the opposite direction to reset and drive the upper pressure cardboard 3 to rise upward. This application adopts a multi-point force-bearing lever-like transmission structure combined with an elastic energy storage and rebound mechanism to ensure the continuity of the height adjustment mechanism 5 under pressure and unloading conditions, and enhance the mechanical transmission stability of the paper feeding channel height switching process.

[0039] Furthermore, such as Figure 2 As shown, the upper pressure plate 3 is provided with a movable protrusion 31, and the upper housing 1 is provided with a guide strip-shaped through hole 13. The movable protrusion 31 passes through the guide strip-shaped through hole 13 and is movably inserted into the adjustment and pushing part 54.

[0040] When the adjusting push part 54 is displaced by force, it transmits an upward or downward force to the moving protrusion 31. Under the physical constraint of the inner wall of the guide strip through hole 13, the moving protrusion 31 is restricted and slides linearly along the length extension direction of the guide strip through hole 13, thereby driving the connected upper pressure plate 3 to perform lifting and lowering actions synchronously. The guiding and cooperating structure of this application plans the physical boundary of the moving path of the upper pressure plate 3, restricts the lateral force interference generated by the flipping transmission of the height adjustment mechanism 5, prevents the upper pressure plate 3 from shifting laterally when it is pressed and moved, maintains the stable posture of the upper pressure plate 3 during the lifting and lowering adjustment process, and reduces the risk of label paper running off track and jamming during the conveying stage. Two movable protrusions 31 are respectively set on both sides of the upper pressure cardboard 3, and the guide strip through hole 13 is semi-circular (not shown in the figure).

[0041] Specifically, such as Figure 3 As shown, the multi-stage push cam mechanism 7 of this application includes a cam body 71 and multiple pressing bosses 72. The multiple pressing bosses 72 are connected and arranged on the outer wall surface of the cam body 71, and the multiple pressing bosses 72 are arranged in an array along the periphery of the cam body 71. The radial distance from the end face of each pressing boss 72 to the axis of the cam body 71 exhibits a geometric feature of gradually increasing. After receiving power, the cam body 71 performs a rotational action around the central axis. As the cam body 71 rotates, the multiple pressing bosses 72 distributed along the periphery sequentially enter the working position and make pressing contact with the pressing side edge 53. Due to the size difference of the gradually increasing radial distance of the end face of each pressing boss 72, the cam body 71 outputs a pushing displacement of different depths every time it rotates through a set angle range. This application uses the multi-bore arrangement method with gradually changing outer contours to transform the continuous rotational drive action into multiple discrete pressing stroke levels, realizing graded step-by-step adjustment control of the pressing side edge 53, increasing the number of levels in the height adjustment process and the transmission positioning stability.

[0042] More specifically, such as Figure 3 and Figure 4 As shown, the height adjustment mechanism 5 also includes a limiting magnetic suction part 56, and the multi-stage push cam mechanism 7 also includes a boss magnetic suction part 73. The limiting magnetic suction part 56 is fitted into the top pressure side edge 53 of the height adjustment mechanism 5, and the boss magnetic suction part 73 is correspondingly inserted into the top pressure boss 72 included in the multi-stage push cam mechanism 7. The boss magnetic suction part 73 and the limiting magnetic suction part 56 form a separable magnetic adsorption connection. As the multi-stage push cam mechanism 7 performs a rotation adjustment action, the end face of the top pressure boss 72 gradually comes into surface contact with the top pressure side edge 53. When the preset stroke position is reached, the boss magnetic suction part 73 and the limiting magnetic suction part 56 are in a spatially facing state. Under the attraction of opposite magnetic poles, 56 attract each other and fit tightly together, thus forming a node locking state. When the applied external rotational driving force is greater than the magnetic attraction, the boss magnetic attraction part 73 and the limiting magnetic attraction part 56 disengage from the magnetic attraction lock and allow the multi-stage push cam mechanism 7 to continue rotating. The magnetic cooperation structure of this application provides a mechanical holding force to resist external vibration interference after the transmission mechanism is adjusted to the correct position, preventing the multi-stage push cam mechanism 7 from accidentally sliding due to equipment vibration, avoiding unexpected sudden changes in the height of the paper feeding channel, and maintaining the stability and safety of the consumable paper feeding state. Both the limiting magnetic part 56 and the boss magnetic part 73 are preferably magnets.

[0043] In addition, such as Figures 3 to 5As shown, the toggle adjustment mechanism 9 of this application includes a toggle drive assembly 91 assembled and connected to the inner side wall of the upper housing 1, a toggle assembly 92 arranged on the outer side wall surface of the upper housing 1 and connected to the power output end of the toggle drive assembly 91, a rotating toggle plate 93 fixedly connected to the toggle assembly 92, and a toggle lever mechanism 8 including a toggle lever body 81 connected to a cam body 71, a toggle protrusion 82 connected to the extended end of the toggle lever body 81, and the toggle protrusion 82 and the rotating toggle plate 93 forming a physical pressing fit relationship in spatial position. When the drive assembly 91 outputs rotational power, it drives the outer drive assembly 92 and the fixedly connected rotating drive plate 93 to perform synchronous rotation. The rotating drive plate 93 uses its edge structure to physically push the drive protrusion 82 in the rotation path, forcing the pressed drive protrusion 82 to drive the drive lever body 81 to undergo angular displacement, thereby transmitting the input torque to the cam body 71 and driving the cam body 71 to rotate. This application constructs a complete power transmission path from the electromechanical drive end to the mechanical execution end. By using the transmission method of direct pushing on the surface of the rotating component, the number of intermediate mechanical connection links is reduced, the assembly complexity of the transmission mechanism is reduced, and the response efficiency of torque transmission and the overall anti-jamming capability are improved. The toggle drive assembly 91 is preferably a motor.

[0044] And, as Figure 3 and Figure 4 As shown, the toggle lever mechanism 8 also includes a toggle magnetic attraction component 83, and the toggle adjustment mechanism 9 also includes an adjustment magnetic attraction component 94. In this application, the toggle magnetic attraction component 83 is installed and inserted into the toggle protrusion 82 included in the toggle lever mechanism 8, and the adjustment magnetic attraction component 94 is correspondingly inserted into the rotating toggle plate 93 included in the toggle adjustment mechanism 9. The toggle magnetic attraction component 83 and the adjustment magnetic attraction component 94 are spatially connected in a magnetically attractive manner. When the rotating toggle plate 93 moves towards the toggle protrusion 82 and performs a contact transmission action, the adjustment magnetic attraction component 94 and the toggle magnetic attraction component 83 approach each other and enter the magnetic field region, generating a magnetic attraction effect. The attraction forces the actuating protrusion 82 and the rotating actuating plate 93 to remain in close contact throughout the transmission process to perform synchronous angular displacement. When the output of rotational power stops, the actuating protrusion 82 maintains a close contact with the rotating actuating plate 93 under magnetic constraint and does not disengage. The magnetic connection method of this application allows the power output component and the force-bearing component to retain a small slip compensation margin at the joint position, reducing the transmission gap between mechanical structures, reducing the mechanical impact noise generated by the components in the reciprocating adjustment action, and increasing the smoothness and reliability of the contact transmission stage. Both the toggle magnetic component 83 and the adjustment magnetic component 94 are preferably magnets.

[0045] Furthermore, such as Figure 5As shown, the toggle limiting mechanism 10 of this application includes a limiting drive component 101 assembled and connected to the inner side wall surface of the upper housing 1, a limiting component 102 arranged on the outer side wall surface of the upper housing 1 and connected to the power output end of the limiting drive component 101, and a rotating limiting plate 103 fixedly connected to the limiting component 102. When the limiting drive component 101 outputs rotational power, it drives the outer limiting component 102 and the fixedly connected rotating limiting plate 103 to perform synchronous rotation. The toggle limiting mechanism 10 is used to cooperate with the rotating toggle plate 93 to clamp the toggle protrusion 82, and is also used to push the toggle protrusion 82 back to reset, thus firmly locking the structural form and target operating position of the paper feed channel height adjustment device. The limit drive component 101 is preferably a motor.

[0046] Furthermore, such as Figure 6 As shown, the width detection mechanism 14 of this application is respectively mounted and fixed on the surfaces of the upper pressure plate 3 and the lower pressure plate 4, and is used to monitor the physical width parameters of the paper passage 11 formed by the upper pressure plate 3 and the lower pressure plate 4. The signal terminals of the width detection mechanism 14 are electrically connected to the toggle drive assembly 91 and the limit drive assembly 101 on the control circuit. When a label paper of a corresponding thickness is inserted into the paper passage 11, the width detection mechanism 14 mounted on the surfaces of the upper pressure plate 3 and the lower pressure plate 4 collects the thickness parameters of the label paper in real time and converts them into feedback electrical signals, triggering the sensor. The toggle drive component 91 is activated and outputs rotational power to perform automatic gear matching and mechanical adjustment of the paper path width. After the height adjustment stroke is completed, the limit drive component 101 is activated and outputs power to perform blocking and limiting action on the toggle protrusion 82. This application constructs a closed-loop automatic adjustment process based on the thickness parameter of the physical medium, eliminating the need for operators to manually identify consumable specifications and manually contact and adjust the mechanical structure, thereby improving the printer's adaptive matching capability when dealing with multiple specifications of label paper and the overall automation level of the system operation. like Figure 6 As shown, the upper pressing cardboard 3 includes a vertical plate 32 and a horizontal plate 33 connected to the vertical plate 32; a movable flange 31 is provided on the vertical plate 32, and a width detection mechanism 14 is provided on the horizontal plate 33. The horizontal plate 33 is aligned with the lower pressing cardboard 4; the width detection mechanism 14 is preferably any one of a linear Hall sensor, a laser displacement sensor or a capacitive thickness sensor.

[0047] Specifically, such as Figure 7 and Figure 8As shown, the toggle assembly 92 of this application has a quick-release through hole 921 and a plug-in toggle groove 922 that communicates with the quick-release through hole 921 and is arranged in an array along the periphery of the toggle assembly 92. The toggle adjustment mechanism 9 includes a plug-in protrusion 95 that is connected to the power output end of the toggle drive assembly 91 and is inserted into the plug-in toggle groove 922 axially to form a physical engagement. The cardboard quick-release seat 96 is connected to the upper housing 1 and has a push-pull through hole 961. One end of the quick-release push-pull tube 97 is connected to the side wall of the toggle assembly 92 and sleeved on the outer side wall of the power output end of the toggle drive assembly 91. The other end of the quick-release push-pull tube 97 is movably inserted into the push-pull through hole 961 and connected to the pull-out rotating handle 98. The end cap 99 is arranged on the cardboard quick-release seat 96 on one side of the pull-out rotating handle 98, and the end cap 99 forms a threaded engagement with the outer opening end of the push-pull through hole 961. When the device is in drive mode, the power output by the actuating drive assembly 91 is transmitted to the actuating assembly 92 via the mating surface of the insertion protrusion 95 and the insertion actuating groove 922. When a paper jam is encountered and intervention is required, the operator loosens the end cap 99 to release the axial limit constraint and pulls the pull-out rotating handle 98 outward. Pulling out the rotating handle 98 pulls the quick-release push-pull tube 97 to slide outward axially within the push-pull through hole 961, and drives the actuating assembly 92 to perform axial displacement simultaneously, forcing the insertion actuating groove 922 to slide outward and disengage from the insertion protrusion 95, cutting off the connection between the actuating drive assembly 91 and the external mechanical structure. The force transmission path is then manually rotated by the operator to pull the handle 98, which drives the adjustment mechanism 9 back to its initial position. The adjustment magnetic component 94 then attracts the magnetic component 83, and the rotating plate 93 drives the moving convex edge 82 to move synchronously, thereby opening the internal paper feeding channel. The pull-out clutch-type release structure of this application provides a physical operation intervention method to cut off the mechanical load when the power unit is jammed or the equipment needs maintenance. This reduces the difficulty of clearing congested label paper in a confined space, shortens the downtime for troubleshooting and routine maintenance of the printing equipment, and increases the system maintainability of the equipment under abnormal operating conditions.

[0048] The implementation principle of the paper feed path height adjustment device for a label printer according to an embodiment of this application is as follows: The toggle adjustment mechanism 9 applies an action to push the toggle lever mechanism 8 to undergo spatial displacement. The toggle lever mechanism 8 simultaneously drives the multi-stage push cam mechanism 7 to rotate. The multi-stage push cam mechanism 7 uses the change in its outer contour to press and push the height adjustment mechanism 5, forcing the height adjustment mechanism 5 to overcome the rebound force of the elastic reset mechanism 6 and rotate around the hinge position with the upper housing 1 as the rotation axis. When the height adjustment mechanism 5 rotates, it drives the connected upper pressure plate 3 to move synchronously, thus completing the adjustment and control of the width of the paper passage 11. This invention realizes the function of converting rotary input into opening and closing lifting motion to change the paper pressure gap, meeting the printer's application requirements for paper feeding of different thicknesses of label paper, and improving the equipment's consumable compatibility range and mechanical transmission stability. After receiving power, the cam body 71 rotates around its central axis. As the cam body 71 rotates, multiple pressing bosses 72 distributed along the circumference sequentially enter the working position and make pressing contact with the pressing side edge 53. Due to the size difference of the radial distance between the end faces of each pressing boss 72 increasing step by step, the cam body 71 outputs a pushing displacement of different depths every time it rotates through a set angle range. This application uses a multi-boob arrangement with a gradually changing outer contour to convert the continuous rotation drive action into multiple discrete pressing stroke levels, realizing graded step adjustment control of the pressing side edge 53, increasing the number of levels in the height adjustment process and the stability of transmission positioning. As the multi-stage push cam mechanism 7 performs rotational adjustment, the end face of the top pressure boss 72 gradually comes into surface contact with the top pressure side edge 53. When the preset stroke position is reached, the boss magnetic attraction part 73 and the limiting magnetic attraction part 56 are in a spatially aligned state. Under the action of opposite magnetic attraction, the boss magnetic attraction part 73 and the limiting magnetic attraction part 56 attract each other and fit tightly together, thus forming a node locking state. When the applied external rotational driving force is greater than the magnetic attraction, the boss magnetic attraction part 73 and the limiting magnetic attraction part 56 disengage from the magnetic lock and allow the multi-stage push cam mechanism 7 to continue rotating. The magnetic coupling structure of this application provides a mechanical holding force to resist external vibration interference after the transmission mechanism is adjusted to the correct position, preventing the multi-stage push cam mechanism 7 from accidentally sliding due to equipment vibration, avoiding unexpected sudden changes in the height of the paper feed channel, and maintaining the stability and safety of the consumable paper feed.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A paper feed path height adjustment device for a label printer, characterized in that, The system includes an upper housing (1), a lower housing (2) connected to the upper housing (1), an upper pressure plate (3) movably connected to the upper housing (1), a lower pressure plate (4) hinged to the lower housing (2) and corresponding to the upper pressure plate (3), a height adjustment mechanism (5) respectively disposed on both sides of the upper housing (1) and hinged to the upper housing (1), an elastic reset mechanism (6) inserted between the upper housing (1) and the height adjustment mechanism (5), a multi-stage push cam mechanism (7) rotatably connected to the upper housing (1) and press-fitted with the height adjustment mechanism (5), a toggle lever mechanism (8) fixedly connected to the multi-stage push cam mechanism (7) and extending in a direction away from the multi-stage push cam mechanism (7), a toggle adjustment mechanism (9) connected to the upper housing (1) and located above the toggle lever mechanism (8), and a toggle limiting mechanism (10) located below the toggle lever mechanism (8). The height adjustment mechanism (5) is hinged to the upper pressure plate (3) at its end. A paper passage (11) is provided between the upper pressure plate (3) and the lower pressure plate (4). The toggle adjustment mechanism (9) is used to toggle the toggle lever mechanism (8) so that the multi-stage push cam mechanism (7) pushes the height adjustment mechanism (5) to rotate around the hinge position with the upper housing (1) as the axis of rotation, thereby moving the upper pressure plate (3) to adjust the width of the paper passage (11).

2. The paper feed path height adjustment device for a label printer according to claim 1, characterized in that, The height adjustment mechanism (5) includes an adjustment mechanism body (51), a hinged protrusion (52) connected to the adjustment mechanism body (51) and hinged to the upper housing (1), a pressing side edge (53) connected to the adjustment mechanism body (51) and used for pressing and engaging with the multi-stage push cam mechanism (7), an adjustment push part (54) connected to the adjustment mechanism body (51) and used for rotatably connecting with the upper edge of the upper pressure plate (3), and a reset pushing side edge (55) connected to the adjustment mechanism body (51) and located below the hinged protrusion (52); a reset baffle (12) is provided on the upper housing (1), and the elastic reset mechanism (6) is located between the reset pushing side edge (55) and the reset baffle (12).

3. The paper feed path height adjustment device for a label printer according to claim 2, characterized in that, The upper pressure plate (3) is provided with a movable protrusion (31), and the upper housing (1) is provided with a guide strip through hole (13). The movable protrusion (31) passes through the guide strip through hole (13) and is movably inserted into the adjustment push part (54).

4. The paper feed path height adjustment device for a label printer according to claim 2, characterized in that, The multi-stage push cam mechanism (7) includes a cam body (71) and a top pressing boss (72) connected to the outer wall of the cam body (71). The cam body (71) is provided with a plurality of top pressing bosses (72). The plurality of top pressing bosses (72) are arranged in an array along the periphery of the cam body (71). The distance between the end face of the plurality of top pressing bosses (72) and the axis of the cam body (71) increases step by step.

5. The paper feed path height adjustment device for a label printer according to claim 4, characterized in that, The height adjustment mechanism (5) further includes a limiting magnetic suction part (56) inserted on the top pressing side edge (53), and the multi-stage push cam mechanism (7) further includes a boss magnetic suction part (73) inserted on the top pressing boss (72) and used to magnetically cooperate with the limiting magnetic suction part (56).

6. The paper feed path height adjustment device for a label printer according to claim 4, characterized in that, The toggle adjustment mechanism (9) includes a toggle drive assembly (91) connected to the inner side wall of the upper housing (1), a toggle assembly (92) located on the outer side wall of the upper housing (1) and connected to the output end of the toggle drive assembly (91), and a rotary toggle plate (93) fixedly connected to the toggle assembly (92); the toggle lever mechanism (8) includes a toggle lever body (81) connected to the cam body (71), and a toggle protrusion (82) connected to the end of the toggle lever body (81), the toggle protrusion (82) being used to press against the rotary toggle plate (93).

7. The paper feed path height adjustment device for a label printer according to claim 6, characterized in that, The toggle lever mechanism (8) further includes a toggle magnetic suction assembly (83) inserted on the toggle protrusion (82), and the toggle adjustment mechanism (9) further includes an adjustment magnetic suction assembly (94) inserted on the rotating toggle plate (93) and used to magnetically cooperate with the toggle magnetic suction assembly (83).

8. The paper feed path height adjustment device for a label printer according to claim 6, characterized in that, The toggle limiting mechanism (10) includes a limiting drive assembly (101) connected to the inner side wall of the upper housing (1), a limiting assembly (102) disposed on the outer side wall of the upper housing (1) and connected to the output end of the limiting drive assembly (101), and a rotating limiting plate (103) fixedly connected to the limiting assembly (102).

9. The paper feed path height adjustment device for a label printer according to claim 8, characterized in that, The upper pressure plate (3) and the lower pressure plate (4) are respectively provided with a width detection mechanism (14) for detecting the width of the paper passage (11). The width detection mechanism (14) is electrically connected to the toggle drive assembly (91) and the limit drive assembly (101).

10. The paper feed path height adjustment device for a label printer according to claim 6, characterized in that, The actuating component (92) is provided with a quick-release through hole (921) for the output end of the actuating drive component (91) to be movably inserted. The inner wall of the actuating component (92) is provided with a plugging actuating groove (922) arranged in an array along the periphery of the actuating component (92) and communicating with the quick-release through hole (921). The toggle adjustment mechanism (9) further includes a plugging flange (95) connected to the output end of the toggle drive assembly (91) and used for axial insertion into the plugging toggle groove (922), a cardboard quick-release seat (96) connected to the upper housing (1), a quick-release push-pull tube (97) connected to the side wall of the toggle assembly (92) and one end sleeved on the outer side wall of the output end of the toggle drive assembly (91), a pull-out rotating handle (98) connected to the other end of the quick-release push-pull tube (97), and an end cap (99) inserted on the cardboard quick-release seat (96) and located on one side of the pull-out rotating handle (98); the cardboard quick-release seat (96) is provided with a push-pull through hole (961), the other end of the quick-release push-pull tube (97) is movably inserted into the push-pull through hole (961), and the end cap (99) is threadedly engaged with the outer opening end of the push-pull through hole (961).

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