Printing device
By designing the avoidance structure of the rubber roller assembly in the printing device, the problem that existing printing devices are prone to scratches on both ends of thermally sensitive paper is solved, and a higher quality printing effect is achieved.
Patent Information
- Application Number
- CN202421943147.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-12
AI Technical Summary
When printing thermal paper, existing printing devices tend to cause scratches on both ends of thermal paper, resulting in poor printing results.
A printing device is designed, including an upper case and a lower case, with a built-in printing module in the upper case and a built-in rubber roller assembly in the lower case. The rubber roller assembly ensures that both ends of the thermal paper will not be directly rubbed by the printing module during printing, thereby avoiding scratches.
Through this design, the printing module is effectively prevented from scratching the two ends of the thermal paper, and the quality and stability of the printing products are improved.
Smart Images
Figure CN222875591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing equipment, in particular to a printing device. Background Art
[0002] Thermal paper is a special processed paper. Its manufacturing principle is to coat a layer of "thermal coating" (also called thermal color-changing layer) on high-quality base paper. When the print head heats and contacts the thermal paper, the colorless dye on the paper changes color due to heat, thus forming an image. Thermal paper does not require ink or other chemical reagents, and can be printed quickly only through heat. Thermal paper is widely used in various printing fields due to its unique printing method and convenience.
[0003] However, the surface coating of thermal paper will undergo a chemical reaction due to frictional heat, leaving black scratches. Most existing printing devices directly place the thermal paper on the entire rubber roller and then use a print head to print on it. This type of printing device is prone to scratches on both ends of the thermal paper during the printing process, causing damage to the thermal paper and affecting the printing effect.
[0004] For this purpose, the utility model provides a printing device. Utility Model Content
[0005] The utility model aims to provide a printing device in view of the deficiencies of the prior art, and aims to solve the problem that the prior printing device easily causes scratches on thermal paper.
[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:
[0007] A printing device comprises: an upper shell, wherein the upper shell comprises a printing module for printing thermal paper; a lower shell, wherein the lower shell comprises a rubber roller assembly for supporting the thermal paper; the upper shell and the lower shell are buckled to form a paper feeding channel with two ends through for bidirectional movement of the thermal paper; the rubber roller assembly comprises a first circular shaft, a second circular shaft, and a third circular shaft that rotate coaxially, wherein the first circular shaft and the third circular shaft are respectively arranged on both sides of the second circular shaft, and a first avoidance position is arranged between the first circular shaft and the second circular shaft, and a second avoidance position is arranged between the second circular shaft and the third circular shaft, and the lengths of the first circular shaft and the third circular shaft are less than the length of the second circular shaft, and the length of the second circular shaft is less than the width of the thermal paper.
[0008] Furthermore, the printing module includes a print head, a printing bracket, and a driven wheel. The print head and the driven wheel are installed inside the printing bracket. The driven wheel is arranged corresponding to the first circular axis and the third circular axis. The print head is arranged corresponding to the second circular axis. A printing area is formed between the print head and the second circular axis. The height of the printing area is equal to the thickness of the thermal paper, and the length of the print head is greater than the length of the second circular axis. The two ends of the print head correspond to the first avoidance position and the second avoidance position respectively.
[0009] Furthermore, first protrusions are arranged at intervals on the edge of the printing support, and second protrusions are arranged on the upper shell. The first protrusions and the second protrusions are arranged in an offset manner to form a zipper structure, and the outer edges of the first protrusions and the second protrusions are both chamfered.
[0010] Furthermore, the lower shell includes a cam, a gear, and a head-lift motor. The cam is arranged on one side of the rubber roller assembly, the cam is arranged as an elliptical structure, the gear is arranged on one side of the cam, and the gear is connected to the driving end of the head-lift motor. The head-lift motor drives the gear to drive the cam to rotate, and the printing bracket is provided with a boss at the position corresponding to the cam.
[0011] Furthermore, a spring group, a spring pressure plate, and a spring fixing plate are arranged between the printing bracket and the upper shell, the spring pressure plate is fixedly arranged inside the upper shell, the spring fixing plate is fixedly connected to the printing bracket, and the two ends of the spring group are respectively connected to the spring pressure plate and the spring fixing plate.
[0012] Furthermore, the printing support and the upper shell are hinged via a first rotating shaft, and the upper shell and the lower shell are hinged via a second rotating shaft.
[0013] Furthermore, the printing device further comprises an inductor and a sensor, wherein the inductor is arranged at the entrance end of the paper feeding channel, and the sensor is arranged at one side of the rubber roller assembly.
[0014] Furthermore, the width of the printing area is 30MM to 70MM.
[0015] Furthermore, a plurality of first ribs are provided on the outer surface of the lower shell facing the upper shell, and a plurality of second ribs are provided on the outer surface of the upper shell facing the lower shell. The plurality of first ribs are staggered, the first ribs and the second ribs are staggered, and the outer edges of the first ribs and the second ribs are both chamfered.
[0016] Furthermore, a coaxial buckle is provided on the lower shell, and a slot is provided at a position of the upper shell corresponding to the coaxial buckle, the upper shell and the lower shell are buckled together through the coaxial buckle and the slot, and baffles for correcting the position of the thermal paper are provided on both sides of the lower shell corresponding to the paper feeding channel.
[0017] The beneficial effects of the utility model are:
[0018] The utility model provides an upper shell and a lower shell, and the upper shell and the lower shell are buckled to form a paper feeding channel with two ends connected and used for bidirectional movement of thermal paper, so that the thermal paper has multiple ways of entering and exiting the paper feeding channel; the rubber roller assembly is arranged in the lower shell, and the rubber roller assembly includes the first circular shaft, the second circular shaft, and the third circular shaft, and the first avoidance position and the second avoidance position are respectively arranged between the first circular shaft and the second circular shaft, and between the second circular shaft and the third circular shaft, so that during the process of printing thermal paper, the two ends of the thermal paper are respectively placed on the first avoidance position and the second avoidance position, which can prevent the two sides of the printing module from scratching the thermal paper, thereby improving the quality of the printed product of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural diagram of the printing device proposed by the utility model;
[0020] Figure 2 A cross-sectional view of the printing device proposed by the utility model;
[0021] Figure 3 This is a structural diagram of the upper housing proposed by the utility model;
[0022] Figure 4 This is a structural diagram of the lower housing proposed by the utility model;
[0023] Figure 5 The utility model provides a structural schematic diagram of the printing module.
[0024] Reference numerals include:
[0025] Upper shell 1; printing module 11; print head 111; printing bracket 112; first protrusion 1121; boss 1122; driven wheel 113; spring group 114; spring pressure plate 115; spring fixing plate 116; second protrusion 12; first rotating shaft 13; second rotating shaft 14; second rib 15; slot 16; lower shell 2; rubber roller assembly 21; first circular shaft 211; second circular shaft 212; third circular shaft 213; cam 22; gear 23; head-up motor 24; first rib 25; coaxial buckle 26; baffle 27; sensor 3; sensor 4. DETAILED DESCRIPTION
[0026] The utility model is described in detail below with reference to the accompanying drawings.
[0027] like Figure 1 , Figure 2 , Figure 4 As shown, the utility model provides a printing device, comprising: an upper shell 1, the upper shell 1 comprising a printing module 11 for printing thermal paper; a lower shell 2, the lower shell 2 comprising a rubber roller assembly 21 for supporting the thermal paper; the upper shell 1 and the lower shell 2 are buckled to form a paper feeding channel for bidirectional movement of the thermal paper with two ends through; the rubber roller assembly 21 comprises a first circular shaft 211, a second circular shaft 212, and a third circular shaft 213 that rotate coaxially, the first circular shaft 211 and the third circular shaft 213 are respectively arranged on both sides of the second circular shaft 212, and a first avoidance position is arranged between the first circular shaft 211 and the second circular shaft 212, and a second avoidance position is arranged between the second circular shaft 212 and the third circular shaft 213, the lengths of the first circular shaft 211 and the third circular shaft 213 are less than the length of the second circular shaft 212, and the length of the second circular shaft 212 is less than the width of the thermal paper.
[0028] The utility model is provided with the upper shell 1 and the lower shell 2, and the upper shell 1 and the lower shell 2 are buckled to form a paper feeding channel with two ends connected and used for bidirectional movement of thermal paper, so that the thermal paper has multiple ways of entering and exiting the paper feeding channel; the rubber roller assembly 21 is arranged in the lower shell 2, and the rubber roller assembly 21 includes the first circular shaft 211, the second circular shaft 212, and the third circular shaft 213, and the first avoidance position and the second avoidance position are respectively arranged between the first circular shaft 211 and the second circular shaft 212, and between the second circular shaft 212 and the third circular shaft 213, so that when the device is printing thermal paper, the two ends of the thermal paper are respectively placed on the first avoidance position and the second avoidance position, which can prevent the two sides of the printing module 11 from scratching the thermal paper, thereby improving the quality of the printed product of the device.
[0029] It should be noted here that scratches on thermal paper have a significant impact on the printing effect. First of all, the surface of thermal paper is very thin and sensitive, and it is easy to produce a thermal reaction when it is rubbed or scratched, leaving black scratches. Such scratches will cause the printed content to be unclear or even completely unrecognizable.
[0030] Specifically, if there are scratches on the thermal paper, these scratches will absorb heat and trigger the thermal layer to develop color, causing the area to turn black, while the unscratched part retains the original color. As a result, the printed text and patterns will appear intermittent and blurred, seriously affecting the print quality. In addition, scratches may also accelerate the wear of thermal paper, shorten its service life, and increase the loss of the printer head. Therefore, during use, you should try to avoid scratching the thermal paper with sharp objects to ensure good printing effects and extend the life of the equipment. In short, scratches on thermal paper will not only affect the printing effect, but also cause the handwriting to be blurred, broken, and even make the printed content unrecognizable, thus affecting the quality and reliability of the final product.
[0031] like Figure 3 , Figure 4 , Figure 5 As shown, the printing module 11 includes a print head 111, a printing support 112, and a driven wheel 113. The print head 111 and the driven wheel 113 are installed inside the printing support 112. The driven wheel 113 is arranged corresponding to the first circular shaft 211 and the third circular shaft 213. The print head 111 is arranged corresponding to the second circular shaft 212. A printing area is formed between the print head 111 and the second circular shaft 212. The height of the printing area is equal to the thickness of the thermal paper, and the length of the print head 111 is greater than the length of the second circular shaft 212. The two ends of the print head 111 correspond to the first avoidance position and the second avoidance position respectively.
[0032] Specifically, in this embodiment, the number of the driven wheels 113 is set to two, and the two driven wheels 113 are respectively located at the two ends of the print head 111, and the two driven wheels 113 correspond to the first circular shaft 211 and the third circular shaft 213 respectively. Therefore, during the printing process, the two driven wheels 113 respectively fix the two ends of the thermal paper to keep the paper pressed all the time, and the second circular shaft 212 corresponds to the position of the print head 111, the length of the print head 111 is slightly longer than the length of the second circular shaft 212, and the two ends of the print head 111 are directly opposite to the thermal paper. The first avoidance position and the second avoidance position correspond to each other, so that the middle part of the thermal paper is in a suspended state, and the print head 111 prints the middle part of the thermal paper, that is, the area between the print head 111 and the second circular shaft 212 is the printing area, and the height of the printing area is equal to the height of a piece of thermal paper, and the specific value is generally 0.2MM~0.5MM, so as to ensure that the print head 111 only prints on one piece of thermal paper at a time; this design further ensures that the print head 111 will not scratch the two ends of the thermal paper while ensuring the printing range.
[0033] In another embodiment, the width of the printing area is 30 MM to 70 MM. Specifically, the printing range of the printing area can be set to 56 MM. Compared with the existing printing devices, the printing range of this printing device is wider.
[0034] like Figure 3 As shown, the edge of the printing bracket 112 is spaced apart with first protrusions 1121, the upper shell 1 is provided with second protrusions 12, the first protrusions 1121 and the second protrusions 12 are staggered to form a zipper structure, and the outer edges of the first protrusions 1121 and the second protrusions 12 are both chamfered.
[0035] Specifically, in this embodiment, the printing bracket 112 is installed in the upper shell 1, and the portion where the printing bracket 112 is connected to the upper shell 1 forms a zipper structure through the staggered arrangement of the first protrusion 1121 and the second protrusion 12, thereby ensuring that the thermal paper can move horizontally in the paper feeding channel. At the same time, the outer edges of the first protrusion 1121 and the second protrusion 12 are both chamfered, and the outer edge of the printing bracket 112 forms a smooth slope, so that the contact surface between the thermal paper and the upper shell 1 or the printing bracket 112 is smoother, reducing friction and wear, which is conducive to further avoiding the phenomenon of paper jams in the thermal paper during paper feeding.
[0036] like Figure 3 , Figure 5 As shown, the lower shell 2 includes a cam 22, a gear 23, and a head-raising motor 24. The cam 22 is arranged on one side of the rubber roller assembly 21. The cam 22 is arranged as an elliptical structure. The gear 23 is arranged on one side of the cam 22, and the gear 23 is connected to the driving end of the head-raising motor 24. The head-raising motor 24 drives the gear 23 to drive the cam 22 to rotate, and the printing bracket 112 is provided with a boss 1122 at the position corresponding to the cam 22.
[0037] Specifically, in the present embodiment, the cam 22 structure is set to be elliptical. When the printing module 11 is not in working condition, the cam 22 protrudes from the surface of the lower shell 2, and the cam 22 abuts against the boss 1122 on the printing bracket 112, so that there is a certain gap between the print head 111 and the second circular shaft 212, so as to prevent the print head 111 and the second circular shaft 212 from contacting, rubbing, and being damaged. When the printing module 11 is in working condition, the head-up motor 24 drives the gear 23 to drive the cam 22 to rotate ninety degrees. At this time, the top of the cam 22 is located on the same horizontal plane as the upper surface of the upper shell 1, so that only one piece of thermal paper can pass between the print head 111 and the second circular shaft 212, so that the printing component can perform printing operation.
[0038] like Figure 2 , Figure 5 As shown, a spring group 114, a spring pressure plate 115, and a spring fixing plate 116 are arranged between the printing support 112 and the upper shell 1, the spring pressure plate 115 is fixedly arranged inside the upper shell 1, the spring fixing plate 116 is fixedly connected to the printing support 112, and the two ends of the spring group 114 are respectively connected to the spring pressure plate 115 and the spring fixing plate 116.
[0039] like Figure 2 , Figure 3 As shown, the printing support 112 and the upper shell 1 are hinged via a first rotating shaft 13 , and the upper shell 1 and the lower shell 2 are hinged via a second rotating shaft 14 .
[0040] Specifically, in this embodiment, when the cam 22 protrudes from the surface of the upper shell 1 and abuts against the boss 1122, the printing support 112 cooperates with the first rotating shaft 13 and the spring group 114 to lift the printing head 111 upward to prevent the printing head 111 from contacting the second circular shaft 212; when the cam 22 is completely received in the lower shell 2, the printing support 112 pops up downward through the elastic action of the first rotating shaft 13 and the spring group 114, cooperates with the second circular shaft 212, and completes the printing operation. The design of the elastic connection between the printing head 111 and the upper shell 1 through the printing spring has a greater torque than other designs through magnet adsorption. The design of the printing support 112 and the upper shell 1 being hinged through the first rotating shaft 13, and the upper shell 1 and the lower shell 2 being hinged through the second rotating shaft 14 has the advantages of easy disassembly and maintenance, versatility, reduced friction, safety and stability.
[0041] like Figure 3 , Figure 4As shown, the printing device further includes an inductor 3 and a sensor 4 . The inductor 3 is arranged at the entrance end of the paper feeding passage, and the sensor 4 is arranged at one side of the rubber roller assembly 21 .
[0042] Specifically, in this embodiment, the sensor 3 is arranged at the entrance of the paper feeding channel. When the sensor 3 senses the thermal paper, the system is started. The sensor 4 is arranged on a side close to the rubber roller assembly 21. When the thermal paper reaches the position of the sensor 4, the sensor 4 calculates the length of the thermal paper, and the system calculates the start-up time of the printing module 11 according to the length of the thermal paper and the current transmission speed of the thermal paper, thereby reflecting the automated management of the entire equipment, without the need for manual operation, saving time and effort.
[0043] like Figure 3 , Figure 4 As shown, the outer surface of the lower shell 2 facing the upper shell 1 is provided with a plurality of first ribs 25, and the outer surface of the upper shell 1 facing the lower shell 2 is provided with a plurality of second ribs 15, the plurality of first ribs 25 are staggered, the first ribs 25 and the second ribs 15 are staggered, and the outer edges of the first ribs 25 and the second ribs 15 are both chamfered.
[0044] Specifically, in the present embodiment, the protruding design of the first rib 25 and the second rib 15 makes the gap between the paper feeding channels more closely fit the thickness of the thermal paper, thereby ensuring that the thermal paper remains in a horizontal state during the transmission process in the paper feeding channel; in addition, the outer edges of the first rib 25 and the second rib 15 are both chamfered to avoid paper jams, thereby improving the use stability and user experience of the device. The chamfering process is not only aesthetically pleasing, but also further prevents sharp edges from causing damage to the thermal paper.
[0045] like Figure 1 As shown, a coaxial buckle 26 is provided on the lower shell 2, and a slot 16 is provided at a position of the upper shell 1 corresponding to the coaxial buckle 26. The upper shell 1 and the lower shell 2 are buckled together through the coaxial buckle 26 and the slot 16, and baffles 27 for correcting the position of thermal paper are provided on both sides of the lower shell 2 corresponding to the paper feeding channel.
[0046] Specifically, in the present embodiment, the design of buckling the upper shell 1 and the lower shell 2 by setting the coaxial buckle 26 facilitates the user to separate the upper shell 1 and the lower shell 2, so as to clean, replace, and repair the internal parts of the device, or remove the thermal paper stuck in the paper feeding channel, etc. The number of the coaxial buckles 26 is set to two, and the two coaxial buckles 26 are respectively arranged at the two ends of the lower shell 2, which improves the stability of the upper shell 1 and the lower shell 2 when they are buckled. At the same time, since the coaxial buckles 26 can move coaxially and open and close at the same time, it is convenient for the user to operate with one hand, thereby improving the ease of use of the present device. In addition, the design of the baffle 27 makes the thermal paper entering the paper feeding channel move along the edge of the baffle 27, so the baffle 27 has the function of guiding and correcting.
[0047] In summary, it can be seen that the utility model has the above-mentioned excellent characteristics, which can enhance the performance unprecedented in the prior art and become a product with great practical value.
[0048] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.
Claims
1. A printing device, characterized in that: include: An upper housing (1), the upper housing (1) comprising a printing module (11) for printing thermal paper; A lower housing (2), the lower housing (2) comprising a rubber roller assembly (21) for supporting the thermal paper; The upper shell (1) and the lower shell (2) are buckled together to form a paper feeding passage with two ends connected and used for bidirectional movement of thermal paper; The rubber roller assembly (21) comprises a first circular shaft (211), a second circular shaft (212), and a third circular shaft (213) which rotate coaxially; the first circular shaft (211) and the third circular shaft (213) are respectively arranged on both sides of the second circular shaft (212); a first avoidance position is arranged between the first circular shaft (211) and the second circular shaft (212); a second avoidance position is arranged between the second circular shaft (212) and the third circular shaft (213); the lengths of the first circular shaft (211) and the third circular shaft (213) are smaller than the length of the second circular shaft (212); and the length of the second circular shaft (212) is smaller than the width of the thermal paper.
2. The printing device according to claim 1, characterized in that: The printing module (11) comprises a printing head (111), a printing support (112), and a driven wheel (113); the printing head (111) and the driven wheel (113) are mounted inside the printing support (112); the driven wheel (113) is arranged correspondingly to the first circular shaft (211) and the third circular shaft (213); the printing head (111) is arranged correspondingly to the second circular shaft (212); a printing area is formed between the printing head (111) and the second circular shaft (212); the height of the printing area is equal to the thickness of the thermal paper; the length of the printing head (111) is greater than the length of the second circular shaft (212); and two ends of the printing head (111) correspond to the first avoidance position and the second avoidance position, respectively.
3. The printing device according to claim 2, characterized in that: The edge of the printing support (112) is provided with first protrusions (1121) at intervals, and the upper shell (1) is provided with second protrusions (12), the first protrusions (1121) and the second protrusions (12) are arranged in a staggered manner to form a zipper structure, and the outer edges of the first protrusions (1121) and the second protrusions (12) are both arranged to be chamfered.
4. The printing device according to claim 3, characterized in that: The lower housing (2) comprises a cam (22), a gear (23), and a head-raising motor (24); the cam (22) is arranged on one side of the rubber roller assembly (21); the cam (22) is arranged in an elliptical structure; the gear (23) is arranged on one side of the cam (22); and the gear (23) is connected to a driving end of the head-raising motor (24); the head-raising motor (24) drives the gear (23) to drive the cam (22) to rotate; and a boss (1122) is arranged on the printing support (112) at a position corresponding to the cam (22).
5. The printing device according to claim 4, characterized in that: A spring group (114), a spring pressure plate (115), and a spring fixing plate (116) are arranged between the printing support (112) and the upper shell (1); the spring pressure plate (115) is fixedly arranged inside the upper shell (1); the spring fixing plate (116) is fixedly connected to the printing support (112); and two ends of the spring group (114) are respectively connected to the spring pressure plate (115) and the spring fixing plate (116).
6. The printing device according to claim 5, characterized in that: The printing support (112) and the upper shell (1) are hinged via a first rotating shaft (13), and the upper shell (1) and the lower shell (2) are hinged via a second rotating shaft (14).
7. The printing device according to claim 1, characterized in that: The printing device further comprises an inductor (3) and a sensor (4), wherein the inductor (3) is arranged at the entrance end of the paper feeding channel, and the sensor (4) is arranged on one side of the rubber roller assembly (21).
8. The printing device according to claim 2, characterized in that: The width of the printing area is 30MM to 70MM.
9. The printing device according to claim 1, characterized in that: The lower shell (2) is provided with a plurality of first ribs (25) on its outer surface facing the upper shell (1), and the upper shell (1) is provided with a plurality of second ribs (15) on its outer surface facing the lower shell (2), the plurality of first ribs (25) are staggered, the first ribs (25) and the second ribs (15) are staggered, and the outer edges of the first ribs (25) and the second ribs (15) are both chamfered.
10. The printing device according to claim 1, characterized in that: The lower shell (2) is provided with a coaxial buckle (26), the upper shell (1) is provided with a slot (16) at a position corresponding to the coaxial buckle (26), the upper shell (1) and the lower shell (2) are buckled together via the coaxial buckle (26) and the slot (16), and baffles (27) for correcting the position of thermal paper are provided on both sides of the lower shell (2) corresponding to the paper feeding channel.