Portable trouble-resistant label printer

Abstract

This utility model relates to the field of printing device technology, and in particular to a portable, trouble-resistant label printer. A portable, trouble-resistant label printer includes a printer body with an inner cavity, within which a paper jamming assembly and a guide groove are disposed. The paper jamming assembly includes: a connecting seat located on one side of the guide groove; a first paper jammer hinged to the connecting seat at a certain angle; a torsion spring, used to generate a restoring force applied to the first paper jammer when the angle between the first paper jammer and the connecting seat changes; and a second paper jammer movably mounted in the guide groove. This solution effectively solves problems such as difficult paper loading, high paper jam rate, severe printing misalignment, and difficulty in cleaning sensors in the prior art, significantly improving the user experience and reliability of label printers.

Description

Technical Field

[0001] This utility model relates to the field of printing device technology, and in particular to a portable, trouble-resistant label printer. Background Technology

[0002] Existing portable label printers typically employ a fixed paper jamming structure, where the paper jammers on both sides are rigid components that are either non-rotatable or can only slide within a very limited range. Furthermore, the sensors are often fixed inside the paper jammers or guide rails. Users must force the label paper between the two paper jammers when loading paper, a cumbersome process that is prone to paper wrinkling, paper jams, and print misalignment due to improper insertion angles or differences in filament thickness. In addition, the sensors fixed inside the paper jammers or guide rails are exposed to dust and paper scraps for extended periods, making effective cleaning nearly impossible. Once dirt adheres to the sensor surface, it cannot accurately detect the label paper position, leading to inaccurate print positioning and even print failures, severely impacting user experience and device reliability. Current technology fails to effectively balance ease of paper loading and low failure rate in both paper jamming component structure and sensor layout, making it difficult to meet the market demand for portable label printers that are both easy to load and have a low failure rate.

[0003] There is an urgent need in this field for a low-failure portable label printer that is simple in structure, easy to load paper, reduces paper jams and print misalignment, and allows for easy cleaning of sensors while ensuring accurate positioning. Utility Model Content

[0004] The purpose of this invention is to provide a convenient, fault-resistant label printer that addresses the shortcomings of existing technologies. It aims to solve problems such as difficulty in loading paper, high paper jam rate, severe printing misalignment, and difficulty in cleaning sensors, thereby improving the user experience and reliability of label printers.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a portable fault-resistant label printer, comprising a printer body with an inner cavity, wherein a paper jamming assembly and a guide groove are disposed within the inner cavity; the paper jamming assembly includes:

[0006] The connecting seat is located on one side of the guide groove, specifically adjacent to the side of the guide groove;

[0007] The first paper jammer is at a certain angle to the connecting seat and is hinged to the connecting seat;

[0008] A torsion spring is used to generate a restoring force applied to the first paper jammer when the included angle between the first paper jammer and the connecting seat changes.

[0009] The second paper jammer is movably mounted on the guide groove and can move along the length of the guide groove.

[0010] Furthermore, a sensor is installed on the side of the first paper jammer near the guide groove.

[0011] Furthermore, the paper jamming assembly also includes a pivot, on which a torsion spring is fitted. The torsion spring has two legs, one extending toward a connecting seat and the other extending toward a first paper jammer, which is hinged to the connecting seat via the pivot.

[0012] Furthermore, the printer body also includes a base, which is mounted on the printer body and forms one side inner wall of the cavity, with guide grooves provided on the base;

[0013] The base also has a first mounting position, and the connector is installed in the first mounting position.

[0014] Furthermore, it also includes a sensing module, which includes the sensor. The sensor is a through-beam sensor, which includes a first sensor and a second sensor. The first sensor is installed on the side of the first paper jammer near the base. The base is also provided with a second mounting position, and the second sensor is installed on the second mounting position. A clamping plate that presses against the second sensor is also installed on the side of the second mounting position away from the first paper jammer.

[0015] Furthermore, the first paper jammer includes a mounting base and a limiting mounting shell. The limiting mounting shell is fastened to the mounting base by a snap-fit ​​connection. One end of the limiting mounting shell is rotatably connected to a rotating shaft, and the other end has a third mounting position. The first sensor is mounted in the third mounting position.

[0016] The sensing module also includes an ADC module, with a voltage follower connected in series before the ADC module;

[0017] The first sensor is the transmitter D1, and the second sensor is the receiver VD1.

[0018] A portable, trouble-resistant label printer includes a printer body with an inner cavity, wherein a paper jamming assembly and a guide groove are disposed within the inner cavity; the paper jamming assembly includes:

[0019] The connecting seat is movably mounted on the guide groove and can move along the length of the guide groove.

[0020] The first paper jammer is at a certain angle to the connecting seat and is hinged to the connecting seat;

[0021] A torsion spring is used to generate a restoring force applied to the first paper jammer when the included angle between the first paper jammer and the connecting seat changes.

[0022] The second paper jammer is fixed and located near one end of the guide slot.

[0023] A convenient method for printing fault-resistant labels includes the following steps:

[0024] Paper loading procedure: Inside the portable label printer which has a first paper jammer, a second paper jammer, and a photoelectric sensor, pry or rotate the first paper jammer to expose the photoelectric sensor.

[0025] Paper insertion steps: Insert the label paper between the first and second paper jammers;

[0026] Reset procedure: Release the first paper jammer, so that the torsion spring drives the first paper jammer to reset and hold the label paper against the inner cavity wall;

[0027] Detection steps: Trigger the through-beam sensor to perform penetration detection. When the transmitting tube and the receiving tube form a stable through-beam signal, output to the ADC module.

[0028] Cleaning steps: If an abnormal signal is detected or there is dirt on the sensor surface, repeat the "paper loading step", clean the sensor, and then re-execute the "reset step" to the "detection step".

[0029] Printing steps: After the photoelectric signal is normal and the label paper is in a stable position, start the printing action to achieve accurate printing of label information.

[0030] Furthermore, the reset step and the detection step also include:

[0031] Adjustment steps: Slide the second paper jammer along the guide groove to adjust the gap between the first and second paper jammers so that the label paper is flat and wrinkle-free;

[0032] During the paper loading process, the first paper jammer is pried open to a preset angle to expose the surface of the transmitter or receiver tube of the through-beam sensor.

[0033] In the paper insertion step, the label paper is inserted from the slit between the first paper jammer and the second paper jammer, either from top to bottom or from bottom to top, ensuring that one side of the label paper is inserted between the baffle of the first paper jammer and the inner wall of the cavity, and the other side of the label paper is inserted between the baffle of the second paper jammer and the inner wall of the cavity.

[0034] In the detection step, the light signal emitted by the transmitting tube of the through-beam sensor penetrates the label paper, the receiving tube receives the light signal and converts it into a voltage signal, and the voltage signal is buffered by a voltage follower and then input into the ADC module;

[0035] During the cleaning process, the criteria for determining whether the sensor surface needs cleaning are that the voltage of the through-beam signal detected by the ADC module is lower than the preset lower limit or the signal fluctuation exceeds the preset tolerance.

[0036] Furthermore, during the adjustment process, the position of the second paper jammer is adjusted in real time based on the signal fed back by the sensing module until the voltage signal collected by the ADC module reaches the preset threshold range.

[0037] The cleaning steps include: prying open the first paper jammer and wiping the sensor surface with a lint-free cleaning tool until the ADC detection signal returns to normal;

[0038] In the printing process, a label paper flatness check is performed before printing information, including: slowly advancing the label paper and detecting that the photoelectric signal is continuous and stable before high-speed printing can be started;

[0039] The method is applicable to various consumables such as ordinary gap label paper, black label paper and colored label paper. When the types of consumables are different, the preset ADC signal threshold and tolerance range can be matched and set one by one.

[0040] The cleaning steps are repeated periodically during multiple printing cycles to ensure the stability of the through-beam sensor's accuracy and the continuous accuracy of label printing over long periods of printing.

[0041] The beneficial effects of this utility model are:

[0042] By combining the rotatable hinged first paper jammer with the torsion spring reset mechanism, the first paper jammer is hinged to the connecting seat at a certain angle. With the torsion spring providing reset elasticity, the user can easily pry open the first paper jammer when loading paper, opening a larger paper loading channel. After inserting consumables, releasing the hand will automatically reset and hold the paper stably, fundamentally simplifying the paper loading operation and reducing paper wrinkles, paper jams, and printing misalignment caused by difficulties in paper insertion.

[0043] The second paper jammer, which is installed on the movable side, is combined with the guide groove, allowing it to slide freely along the length of the guide groove. Users can quickly adjust the distance between the two paper jammers to accommodate label paper of different thicknesses and materials, ensuring that the paper enters the printing area flat, thereby further improving paper loading efficiency and reducing the probability of paper jams.

[0044] This invention enables sensor position optimization and easy cleaning. It can arrange an easily accessible detection module (through-beam or single-reflection sensor) at an appropriate position between the paper jam assembly and the guide groove. By utilizing the rotatable characteristics of the first paper jammer, the sensor surface can be easily exposed during paper loading or cleaning, making it convenient for users to wipe quickly and avoiding positioning errors or printing failures caused by dirty sensors.

[0045] Through the above solution, the portable fault-resistant label printer of this utility model can achieve the following while ensuring simple structure and controllable cost:

[0046] Easier paper loading: The hinge and torsion spring design greatly reduces the difficulty of paper loading.

[0047] Lower failure rate: Quick adjustment and automatic reset reduce paper wrinkles and paper jams;

[0048] More precise positioning: The easy-to-clean sensor layout ensures long-term stable detection accuracy.

[0049] In summary, this utility model effectively solves the problems of paper loading difficulties, high paper jam rate, serious printing misalignment, and difficulty in cleaning sensors in the prior art, and significantly improves the user experience and reliability of label printers. Attached Figure Description

[0050] Figure 1 Figure B is a cross-sectional view of Figure A along line M, and Figure C is an enlarged view of a partial cross-section of Figure A along line L.

[0051] Figure 2 This is a schematic diagram of the overall structure of a convenient fault-resistant label printer according to the present invention.

[0052] Figure 3 for Figure 2 A structural decomposition diagram.

[0053] Figure 4 This is a schematic diagram of the base and paperboard assembly of this utility model.

[0054] Figure 5 for Figure 4 A schematic diagram of structural decomposition from one perspective.

[0055] Figure 6 for Figure 4 A schematic diagram of structural decomposition from another perspective.

[0056] Figure 7 This is a schematic diagram of the structure between the connector and the first paper jammer of this utility model under normal conditions, wherein diagram D is another perspective view of diagram C.

[0057] Figure 8 for Figure 7 A structural decomposition diagram, where diagram C' is... Figure 7 The structural decomposition of diagram C, and diagram D' is... Figure 7 Structural decomposition of the D diagram.

[0058] Figure 9 The diagram shows the structure of the connector and the first paper jammer in different states, namely the normal state and the state after being moved.

[0059] Figure 10 This is a cross-sectional schematic diagram of a partial structure of this utility model.

[0060] Figure 11 This is another cross-sectional schematic diagram of a partial structure of this utility model.

[0061] Figure 12 This is a circuit diagram of the sensing module of this utility model.

[0062] The reference numerals in the figures include:

[0063] 100—Printer body;

[0064] 200—Label paper;

[0065] 1—Inner cavity,

[0066] 11—Guide groove, 12—Inner cavity wall;

[0067] 21—First paper jammer, 22—Second paper jammer, 23—Connector, 24—Torsion spring, 25—Spindle.

[0068] 211—Mounting base, 212—Limiting mounting shell,

[0069] 231—Second connecting hole, 2121—Third mounting position;

[0070] 3—Base

[0071] 31—First mounting position, 32—Second mounting position, 33—Pressure plate.

[0072] 311—First connecting hole;

[0073] 4—Sensors

[0074] 41—Single reflection sensor, 42—Through-beam sensor

[0075] 421—First sensor, 422—Second sensor. Detailed Implementation

[0076] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present utility model. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0077] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. The terminology used in this specification of this utility model is only for the purpose of describing specific embodiments and is not intended to limit this utility model.

[0078] In the current label printer market, users often encounter difficulties loading paper, causing paper wrinkles that cannot be lifted, resulting in user inconvenience. Furthermore, after prolonged use, dirt and paper residue on sensor 4 can lead to inaccurate positioning. Therefore, a paper jammer that facilitates easy paper loading (rotatable with automatic springback) while also cleaning sensor 4 is needed. Additionally, a solution using a through-beam sensor 42 at sensor 4 is required, ensuring compatibility with various consumables on the market. Traditional non-rotating paper jammers are no longer adequate for market demands.

[0079] as follows Figure 1 As shown, Figure B is a cross-sectional structural diagram along line M of Figure A, and Figure C is an enlarged cross-sectional structural diagram along line L of Figure A. The conventional method in the prior art is to fix the right paper clamp 52, with a single-reflection sensor 41 fixed in a concealed location at the slot opening of the right paper clamp 52 and the inner cavity wall 12. The left paper clamp 51 and right paper clamp 52 are used to clamp the two sides of the label paper 200 onto the inner cavity wall 12 of the label printer, respectively. When loading paper, the label paper 200 needs to be inserted between the left paper clamp 51 and the right paper clamp 52 (it should be mentioned that...). Figure 1 This is an illustrative diagram intended to depict a portion of existing structures in the prior art (and does not represent or acknowledge that all structures shown in the diagram are prior art). This existing solution has the following two drawbacks:

[0080] 1. Loading paper can be cumbersome and prone to paper jams, print misalignment, and other instability issues, severely impacting the user experience. Through repeated research, the inventor discovered that this is due to incorrect label paper installation. For example, inserting the label paper at a slight angle or inserting it too loosely between the left and right paper trays 51 and 52 can easily cause wrinkles in the label paper. This is especially true when the width between the paper and the left and right paper trays 51 and 52 is close, making it particularly difficult to load and thus leading to paper jams and print misalignment during printing.

[0081] 2. Inaccurate label printing positioning and recognition leads to inaccurate printing, effectively rendering the machine damaged. Through repeated research, the inventor discovered that because sensor 4 is fixed inside the right paper jammer 52, it cannot be cleaned. After prolonged use, sensor 4 becomes dirty and inaccurate in positioning and recognition, rendering the printing machine essentially damaged and causing significant inconvenience to customers.

[0082] In addition, most of the sensors 4 in the aforementioned traditional label printers are single-reflection sensors 41, resulting in fewer and simpler compatible consumables.

[0083] Therefore, embodiments of this application provide a convenient fault-resistant label printer and a convenient fault-resistant label printing method, which simplifies the paper loading process, improves paper loading efficiency, and reduces the probability of paper output errors, so as to avoid paper jams, printing offsets and other situations that occur during the printing process due to difficulties in paper loading. In addition, it can also solve the problem of the sensor 4 being difficult to clean, making the sensor 4 easy to clean and avoiding inaccurate positioning and recognition due to dirt on the sensor 4.

[0084] like Figures 2-12 As shown, this embodiment of the utility model provides a convenient fault-resistant label printer, including:

[0085] The printer body 100 has an inner cavity 1; the inner cavity 1 is provided with a paper jam assembly and a guide groove 11. A sensor 4 is provided on the paper jam assembly.

[0086] The paper jamming assembly includes a first paper jammer 21, a second paper jammer 22, a connecting seat 23, and a torsion spring 24. The connecting seat 23 is installed at one end of the guide groove 11 and adjacent to the guide groove 11. A rotating shaft 25 is provided on the connecting seat 23. The first paper jammer 21 is hinged to the connecting seat 23 via the rotating shaft 25. The torsion spring 24 is fitted into the rotating shaft 25, with one connecting end of the torsion spring 24 installed on the connecting seat 23 and the other connecting end of the torsion spring 24 installed on the first paper jammer 21. The torsion spring 24 generates a restoring force when the first paper jammer 21 is pried open or rotated, so that the first paper jammer 21 is reset after the force applied to the first paper jammer 21 is removed. The second paper jammer 22 is movably connected to the guide groove 11, allowing the second paper jammer 22 to move along the length direction of the guide groove 11 to adjust the distance between the first paper jammer 21 and the second paper jammer 22.

[0087] In another embodiment, the guide groove 11 can also be a guide rail.

[0088] In another embodiment, the second paper jammer 22 is a slider structure made of a low-friction material, so that the user can quickly adjust the paper jam gap with one hand.

[0089] The sensor 4 is installed on the inner wall of the first paper jammer 21 near the inner cavity 1 or the guide groove 11, so that when the first paper jammer 21 is pried or rotated, the sensor 4 can be exposed to facilitate cleaning of the sensor 4 and avoid inaccurate positioning recognition due to dirt on the sensor 4.

[0090] Preferably, the printer body 100 further includes a base 3, which is mounted on the printer body 100 and forms one side inner wall of the inner cavity 1. A guide groove 11 is disposed on the base 3. The base 3 is also provided with a first mounting position 31, which is provided with two first connecting holes 311. The bottom of the connecting seat 23 is provided with second connecting holes 231 that match the first connecting holes 311 one by one. The connecting seat 23 is threadedly connected to the first connecting holes 311 and the second connecting holes 231 to be fixed on the first mounting position 31 of the base 3.

[0091] This portable, trouble-resistant label printer also includes a sensing module, which includes the sensor 4, preferably a through-beam sensor 42. The through-beam sensor 42 includes a first sensor 421 and a second sensor 422. The first sensor 421 is mounted on the side of the first paper jammer 21 near the base 3. The base 3 also has a second mounting position 32, on which the second sensor 422 is mounted and secured by a clamping plate 33.

[0092] The first paper jammer 21 includes a mounting base 211 and a limiting mounting shell 212. The limiting mounting shell 212 is fastened to the mounting base 211 by a snap-fit ​​connection. One end of the limiting mounting shell 212 is rotatably connected to a rotating shaft 25, and the other end has a third mounting position 2121, on which the first sensor 421 is mounted. When the first paper jammer 21 is not moved, that is, when the first paper jammer 21 is in its normal state, the third mounting position 2121 is directly opposite the second mounting position 32, so that in this state, the first sensor 421 is directly opposite the second sensor 422, forming a through-beam sensor. The design of the through-beam sensor 42 is compatible with various consumables available on the market (gap, black label, shelf, color, etc.) to improve product compatibility. In addition, the rotatable design of the first paper jammer 21 makes it easier to install and adjust the through-beam sensor 42, as well as to clean the through-beam sensor 42, reducing the problem of inaccurate sensor 42 due to dirt and difficulty in cleaning.

[0093] A convenient method for printing fault-resistant labels, characterized by the following steps:

[0094] Paper loading procedure: In the inner cavity 1 of the portable label printer having a first paper jammer 21, a second paper jammer 22 and a through-beam sensor 4, pry or rotate the first paper jammer 21 to expose the through-beam sensor 4.

[0095] Paper insertion steps: Insert the label paper 200 between the first paper jammer 21 and the second paper jammer 22;

[0096] Reset procedure: Release the first paper jammer 21, so that the torsion spring 24 drives the first paper jammer 21 to reset, and hold the label paper 200 in the inner cavity wall 12;

[0097] Detection steps: Trigger the through-beam sensor 4 to perform penetration detection. When the transmitting tube and the receiving tube form a stable through-beam signal, output to the ADC module;

[0098] Cleaning steps: If an abnormal beam signal is detected or there is dirt on the surface of sensor 4, repeat the "paper loading step", clean sensor 4, and then re-execute the "reset step" to the "detection step".

[0099] Printing steps: After the photoelectric signal is normal and the label paper is in position 200, start the printing action to achieve accurate printing of label information.

[0100] Preferably, the reset step and the detection step further include:

[0101] Adjustment steps: Slide the second paper jammer 22 along the guide groove 11 to adjust the gap between the first paper jammer 21 and the second paper jammer 22;

[0102] During the paper loading step, the first paper jammer 21 is bent to a preset opening angle to expose the surface of the transmitting tube or receiving tube of the through-beam sensor 4;

[0103] In the paper insertion step, the label paper 200 is inserted from top to bottom or bottom to top through the slit between the first paper jammer 21 and the second paper jammer 22, ensuring that one side of the label paper 200 is inserted between the baffle of the first paper jammer 21 and the inner cavity wall 12, and the other side of the label paper 200 is inserted between the baffle of the second paper jammer 22 and the inner cavity wall 12.

[0104] In the detection step, the light signal emitted by the transmitting tube of the through-beam sensor 4 penetrates the label paper 200, the receiving tube receives the light signal and converts it into a voltage signal, and the voltage signal is buffered by a voltage follower and then input into the ADC module;

[0105] During the cleaning process, the criteria for determining whether the surface of sensor 4 needs cleaning are that the voltage of the through-beam signal detected by the ADC module is lower than the preset lower limit or the signal fluctuation exceeds the preset tolerance.

[0106] Preferably, in the adjustment step, the position of the second paper jammer 22 is adjusted in real time by the signal fed back by the sensing module until the voltage signal collected by the ADC module reaches the preset threshold range;

[0107] The cleaning steps include: prying open the first paper jammer 21 and wiping the surface of the sensor 4 with a lint-free cleaning tool until the ADC detection signal returns to normal;

[0108] During the printing process, a flatness check is performed on 200 labels before printing information. This includes: slowly driving the label paper 200 forward and detecting that the photoelectric signal is continuous and stable before high-speed printing can be started.

[0109] The method is applicable to ordinary gap label paper 200, black label paper 200 and color label paper 200 consumables. When the consumable types are different, the preset ADC signal threshold and tolerance range can be matched and set one by one.

[0110] The cleaning steps are repeated periodically during the printing cycle.

[0111] This solution uses a rotatable hinged first paper jammer 21 and a torsion spring 24 to reset the first paper jammer 21 and the connecting seat 23 at a certain angle. With the torsion spring 24 providing reset elasticity, the user can easily pry open the first paper jammer 21 when loading paper, opening a larger paper loading channel. After inserting consumables, releasing the hand will automatically reset and stably hold the paper, fundamentally simplifying the paper loading operation and reducing paper wrinkles, paper jams, and printing misalignment caused by difficulties in paper insertion.

[0112] The second paper jammer 22, which is installed in a movable manner, is combined with the guide groove 11, allowing the second paper jammer 22 to slide freely along the length direction within the guide groove 11. Users can quickly adjust the distance between the two paper jammers to adapt to label paper 200 of different thicknesses and materials, so that the paper enters the printing area flat, thereby further improving paper loading efficiency and reducing the probability of paper jams.

[0113] This invention enables the optimization of sensor 4 position and ease of cleaning. The invention can arrange an easily accessible detection module (through-beam or single-reflection sensor 41) at an appropriate position between the paper jam assembly and the guide groove 11. By utilizing the rotatable characteristics of the first paper jammer 21, the surface of sensor 4 can be easily exposed when loading paper or cleaning, making it convenient for users to wipe quickly and avoiding positioning errors or printing failures caused by dirty sensor 4.

[0114] Through the above solution, the portable fault-resistant label printer of this utility model can achieve the following while ensuring simple structure and controllable cost:

[0115] Easier paper loading: The hinge and torsion spring 24 design greatly reduces the difficulty of paper loading.

[0116] Lower failure rate: Quick adjustment and automatic reset reduce paper wrinkles and paper jams;

[0117] More precise positioning: The easy-to-clean sensor 4 layout ensures long-term stable detection accuracy.

[0118] In summary, this utility model effectively solves the problems of paper loading difficulties, high paper jam rate, serious printing offset, and difficulty in cleaning sensor 4 in the prior art, and significantly improves the user experience and reliability of label printers.

[0119] Preferably, the first sensor 421 serves as the transmitting tube D1, and the second sensor 422 serves as the receiving tube VD1; or the first sensor 421 serves as the receiving tube, and the second sensor 422 serves as the transmitting tube. The sensing module also includes an ADC module (digital-to-analog converter module).

[0120] In detail, such as Figure 12 As shown in the circuit diagram, the through-beam sensor 42 is a through-beam photoelectric sensor 4, and its principle is as follows:

[0121] First, the transmitting tube emits a light signal that penetrates the label paper 200, and the receiving tube receives the light signal, causing a voltage drop (voltage change) in the transistor VD1. Because the label surface and gap surfaces on the label paper 200 have different thicknesses / transparencies, the signals received by the receiving tube differ, changing from high to low levels, thus altering the voltage. Adding a voltage follower before ADC acquisition makes ADC detection more accurate. The input impedance of an ADC is usually finite (especially successive approximation SAR ADCs), while the output impedance of the signal source (such as sensor 4, voltage divider circuit, etc.) may be high. If directly connected, the output impedance of the signal source and the input impedance of the ADC will form a voltage divider, causing the actual voltage input to the ADC to be attenuated, resulting in errors. The voltage follower has extremely high input impedance (usually in the megaohm range) and extremely low output impedance (usually a few ohms to tens of ohms). It can effectively isolate the signal source from the ADC, ensuring that the voltage from the signal source is transmitted to the ADC input terminal with almost no loss.

[0122] Printing on regular 200mm label paper is relatively stable and less prone to errors. However, when using 200mm label paper such as black label paper, it is easy to cause inaccurate positioning and frequent printing misalignments.

[0123] In traditional label printers, when printing with plain label paper 200, there's a difference (such as color difference) between the gap on the front of the paper 200 (the adhesive side) and the label surface. Therefore, the gapped side needs to face the sensor 4 to be detected and positioned. The other side, lacking color difference, cannot be detected by the sensor 4. Thus, when loading the paper, the gapped side of the plain label paper 200 faces the sensor 4, resulting in more stable printing and fewer errors. However, when printing with materials like black label paper, inaccurate positioning is more likely, frequently leading to printing misalignments.

[0124] Through repeated research, the inventor discovered that the issue stems from the fact that most existing label printers use a single-reflection sensor 41. When printing on ordinary label paper 200, as long as the label paper 200 is correctly installed, with the gap side facing the sensor 41, the single-reflection sensor 41 can still stably position the label paper 200. However, for black label paper, the front side, where the information needs to be printed, is typically pure white with no gaps between labels, while the back side has black gaps between the two labels, and the back label side is usually white, creating a color difference. If the label printer uses a single-reflection sensor 41, the back side of the black label paper must also face the sensor 41 to create a significant voltage difference and accurately position the label paper 200. However, the inventor found that the single-reflection sensor 41 has high requirements for the detection stroke, the distance between the sensor and the label, and the tolerance of changes in the distance; otherwise, inaccurate positioning can easily occur. When the back of the black label paper faces the single reflective sensor 41, it tends to arch up, becoming uneven and not flat. This makes it easy for the single reflective sensor 41 to misposition, failing to identify the position of the label paper 200, which in turn leads to frequent printing misalignment and a high failure rate.

[0125] To address the aforementioned issues, this solution, building upon the rotatable design of the first paper jammer 21, further employs a through-beam sensor 42. This design is compatible with both standard label paper 200 and special label paper 200 such as black label paper. It eliminates the need for excessively high spacing between the label paper 200 and the sensor 4, as well as excessively high flatness requirements for the label paper 200. This results in greater compatibility, higher stability, and a lower failure rate. For black label paper, through-beam printing uses a penetration method, resulting in a difference on the back (significant voltage difference), while reflection results in no difference on the front of the black label paper (no significant voltage difference). This also demonstrates that the through-beam sensor 42 is compatible with a wider range of consumables than the single-emission sensor 4, adapting to various consumables on the market, including standard gap paper, black label paper, color labels, and shelf labels, offering greater compatibility. In addition, the rotatable design of the first paper jammer 21 makes it easier to install and adjust the through-beam sensor 42, as well as clean the through-beam sensor 42, reducing the inaccuracy of the sensor 4 due to dirt and difficulty in cleaning. It also simplifies the paper loading process, improving paper loading efficiency and reducing the probability of paper output errors, so as to avoid paper jams, printing offsets and other problems caused by difficulties in paper loading.

[0126] In the specification and claims of this application, the terms "comprising / including" and "having / including" and variations thereof are used to specify the presence of the stated features, values, steps or components, but do not exclude the presence or addition of one or more other features, values, steps, components or combinations thereof.

[0127] Some features of this invention are described in different embodiments for clarity; however, these features may also be described in combination in a single embodiment. Conversely, some features of this invention are described only in a single embodiment for brevity; however, these features may also be described individually or in any suitable combination in different embodiments.

[0128] Finally, it should be noted that any cross-referencing or superposition of the various embodiments of this solution by those skilled in the art still falls within the original disclosure scope of this solution. Furthermore, the above descriptions are merely preferred embodiments of this utility model and are not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A portable, trouble-resistant label printer, characterized in that, The printer body (100) includes an inner cavity (1) in which a paper jamming assembly and a guide groove (11) are disposed; the paper jamming assembly includes: The connecting seat (23) is located on one side of the guide groove (11); The first paper jammer (21) is at a certain angle to the connecting seat (23) and is hinged to the connecting seat (23); A torsion spring (24) is used to generate a restoring force applied to the first paper jammer (21) when the included angle between the first paper jammer (21) and the connecting seat (23) changes; The second paper jammer (22) is movably mounted on the guide slot (11).

2. The portable fault-resistant label printer according to claim 1, characterized in that, The first paper jammer (21) has a sensor (4) on the side near the guide groove (11).

3. The portable fault-resistant label printer according to claim 2, characterized in that, The paper jamming assembly also includes a pivot (25), a torsion spring (24) sleeved on the pivot (25), the torsion spring (24) having two legs, one leg extending to the connecting seat (23) and the other leg extending to the first paper jammer (21), the first paper jammer (21) being hinged to the connecting seat (23) via the pivot (25).

4. The portable fault-resistant label printer according to claim 3, characterized in that, The printer body (100) also includes a base (3), which is mounted on the printer body (100) and forms one side inner wall of the inner cavity (1). A guide groove (11) is provided on the base (3). The base (3) is also provided with a first mounting position (31), and the connecting seat (23) is installed in the first mounting position (31).

5. The portable fault-resistant label printer according to claim 4, characterized in that, It also includes a sensing module, which includes the sensor (4). The sensor (4) is a through-beam sensor (42). The through-beam sensor (42) includes a first sensor (421) and a second sensor (422). The first sensor (421) is installed on the side of the first paper jammer (21) near the base (3). The base (3) is also provided with a second mounting position (32). The second sensor (422) is installed on the second mounting position (32). The side of the second mounting position (32) away from the first paper jammer (21) is also provided with a clamping plate (33) that presses against the second sensor (422).

6. The portable fault-resistant label printer according to claim 5, characterized in that, The first paper jammer (21) includes a mounting base (211) and a limiting mounting shell (212). The limiting mounting shell (212) is fastened to the mounting base (211) by a snap-fit ​​connection. One end of the limiting mounting shell (212) is rotatably connected to the rotating shaft (25), and the other end is provided with a third mounting position (2121). The first sensor (421) is installed in the third mounting position (2121). The sensing module also includes an ADC module, with a voltage follower connected in series before the ADC module; The first sensor (421) serves as the transmitting tube D1, and the second sensor (422) serves as the receiving tube VD1.

7. A portable, trouble-resistant label printer, characterized in that, The printer body (100) includes an inner cavity (1) in which a paper jamming assembly and a guide groove (11) are disposed; the paper jamming assembly includes: Connector (23), movably mounted on guide groove (11); The first paper jammer (21) is at a certain angle to the connecting seat (23) and is hinged to the connecting seat (23); A torsion spring (24) is used to generate a restoring force applied to the first paper jammer (21) when the included angle between the first paper jammer (21) and the connecting seat (23) changes; The second paper jammer (22) is fixed and adjacent to one end of the guide groove (11).

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