A printing medium position and tension adjusting device for a printer
By using a deflection frame and tension adjustment mechanism in the printer, the position and tension of the printing media can be manually adjusted, solving the problems of the printhead not being perpendicular to the printing media and tension variations, thus achieving high-quality printing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI TONGYIN INKJET TECHNOLOGY CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-21
AI Technical Summary
The printhead is not perpendicular to the printing medium, causing ink droplets to fall at an angle, resulting in unclear printed patterns. Furthermore, changes in the tension and positional shift of the printing medium affect print quality.
A printing media position and tension adjustment device, including a deflection frame, guide rollers, and tension adjustment mechanism, is used to ensure that the printing media is parallel to the edge of the printhead and maintain appropriate tension by manually adjusting the deflection angle and tension.
It improves print quality, avoids pattern skewing, and is easy to operate.
Smart Images
Figure CN224528307U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printing equipment technology, and in particular to a printing media position and tension adjustment device for printers. Background Technology
[0002] Inkjet printers print patterns or text by ejecting ink droplets onto the printing medium through a printhead. During printing, the bottom surface of the printhead must be perpendicular to the top surface of the printing medium to ensure that the ink droplets fall vertically onto the medium's surface. If the printhead is not perpendicular, the ink droplets will fall at an angle, causing the droplets to land at a misaligned point, larger droplets with smaller spacing, and even overlapping. This results in unclear colors, blurry images, and inaccurate resolution. Furthermore, the long side of the printhead must be perpendicular to the direction of movement of the printing medium; otherwise, the printed pattern will be misaligned. For printing on paper rolls, the printing medium is wound around several paper rollers. The image is printed by the lateral scanning of the printing carriage and the longitudinal stepping of the printing medium. During printing, the printing medium needs to maintain sufficient tension to ensure it remains flat and does not deform, so that the bottom surface of the print head is perpendicular to the surface of the printing medium below it, and the edges of the printing medium are parallel to the edges of the print head to avoid skewing of the printed pattern. However, because paper rolls are wound around a drive roller and multiple guide rollers, they are relatively long and have flexible characteristics. During the movement of the printing medium, microscopic deformation often occurs, and the friction between the printing medium and the rollers can cause relative slippage, resulting in changes in the tension and displacement of the printing medium, thus affecting print quality.
[0003] In view of this, the present invention provides a printing medium position and tension adjustment device for printers, which allows manual adjustment of the position and tension of the printing medium during the printing process without affecting the printing process and is easy to operate. Utility Model Content
[0004] The present invention aims to provide a printing media position and tension adjustment device for printers to overcome the shortcomings of the prior art. The technical problem to be solved by the present invention is achieved through the following technical solution.
[0005] A printing media position and tension adjustment device for a printer includes a base frame, a deflection frame, a deflection adjustment mechanism, and a tension adjustment mechanism. The deflection frame is disposed above the base frame and has a plurality of guide rollers for winding the printing media. The tension adjustment mechanism is also disposed on the deflection frame and is used for winding the printing media and adjusting the tension of the printing media. The deflection adjustment mechanism is disposed between the base frame and the deflection frame and is used to adjust the deflection angle of the deflection frame, thereby adjusting the position of the printing media.
[0006] Preferably, the tension adjustment mechanism includes a tension handwheel, a reducer, and an eccentric roller. The two ends of the eccentric roller are rotatably mounted on the deflection frame, and one end of the eccentric roller is fixedly connected to the tension handwheel through the reducer.
[0007] Preferably, the deflection frame includes a deflection support plate, with deflection end plates installed at the front and rear ends of the deflection support plate, an eccentric roller installed between the two deflection end plates, and the two ends of the eccentric roller being rotatably connected to the deflection end plates, and a reducer installed on the outside of one of the deflection end plates, with one end of the reducer connected to one end of the eccentric roller and the other end connected to the tension handwheel.
[0008] Preferably, the guide roller is installed between the two deflection end plates, and its two ends are rotatably connected to the deflection end plates.
[0009] Preferably, the deflection adjustment mechanism includes a deflection handwheel, a deflection adjustment rod, a deflection pull shaft, a deflection rotating shaft, and a deflection positioning mechanism. The upper end of the deflection pull shaft is rotatably connected to the deflection frame. One end of the deflection adjustment rod is threadedly connected to the lower end of the deflection pull shaft, and the other end is rotatably connected to the bottom frame. The deflection handwheel is installed at the end of the deflection adjustment rod. The lower end of the deflection rotating shaft is rotatably connected to the bottom frame, and the upper end is fixedly connected to the deflection frame. One end of the deflection positioning mechanism is rotatably connected to the deflection frame, and the other end is rollingly connected to the bottom frame.
[0010] Preferably, the upper end of the deflection pull shaft is rotatably connected to the deflection frame via a deflection bearing and a deflection bearing seat.
[0011] Preferably, the deflection positioning mechanism includes a deflection positioning block and a cam follower. The upper end of the deflection positioning block is fixedly connected to the bottom of the deflection frame. The bottom frame includes a bottom fixing plate. The cam follower is installed at the upper and lower ends of one side of the deflection positioning block. The deflection positioning block can move relative to the bottom fixing plate. The circumferential surfaces of the two cam followers on the deflection positioning block abut against the upper and lower end surfaces of the bottom fixing plate, respectively.
[0012] Preferably, the number of the deflection positioning mechanisms is four, and they are respectively located at the four corners of the bottom of the deflection frame.
[0013] Preferably, the four corners of the bottom fixing plate are respectively provided with receiving holes, which are used to receive the deflection positioning block and match the movement trajectory of the deflection positioning block.
[0014] Preferably, a deflection rod seat is installed at one end of the base frame, and the end of the deflection adjustment rod is fixedly installed on the deflection rod seat.
[0015] In this invention, the printing medium is wound around the tension adjustment mechanism and the guide roller. As the printing operation progresses and the tension of the printing medium changes, the tension adjustment mechanism can be used to adjust the tension of the printing medium, ensuring it is under suitable tension and thus improving print quality. During printing, if the edge of the printing medium deviates from the edge of the print head, which was initially parallel, the deflection adjustment mechanism can adjust the deflection angle of the deflection frame in the horizontal plane. Since the printing medium is wound around the tension adjustment mechanism and guide roller mounted on the deflection frame, the deflection angle of the printing medium is adjusted to ensure that the edge of the printing medium is parallel to the edge of the print head, thus preventing skewing of the printed image.
[0016] This utility model provides a printing media position and tension adjustment device for printers, which allows manual adjustment of the deflection position and tension of the printing media during the printing process, thereby improving printing quality and providing convenient operation. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a structural schematic diagram of the present invention from another angle;
[0019] Figure 3 This is a schematic diagram of the deflection adjustment mechanism in this utility model;
[0020] Figure 4 This is a schematic diagram of the deflection adjustment mechanism from another angle in this utility model;
[0021] Figure 5 This is a schematic diagram of the eccentric shaft in this utility model;
[0022] Figure 6 This is a structural schematic diagram of the eccentric shaft at another angle in this utility model;
[0023] The reference numerals in the attached figures are as follows: 1. Base frame; 11. Base plate; 12. Bottom side plate; 13. Bottom fixing plate; 131. Accommodation hole; 2. Deflection frame; 21. Deflection support plate; 22. Deflection end plate; 23. Guide roller; 31. Deflection handwheel; 32. Deflection adjusting rod; 33. Deflection pulling shaft; 34. Deflection bearing seat; 35. Deflection shaft; 36. Deflection positioning block; 37. Cam follower; 38. Deflection rod seat; 41. Tensioning handwheel; 42. Reducer; 43. Eccentric shaft. Detailed Implementation
[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0025] Example 1:
[0026] An improvement of a printing media position and tension adjustment device for a printer is that it includes a base frame 1, a deflection frame 2, a deflection adjustment mechanism, and a tension adjustment mechanism. The deflection frame 2 is disposed above the base frame 1, and a plurality of guide rollers 23 are disposed on the deflection frame 2. The guide rollers 23 are used to wind the printing media. The tension adjustment mechanism is also disposed on the deflection frame 2 and is used to wind the printing media and adjust the tension of the printing media. The deflection adjustment mechanism is disposed between the base frame 1 and the deflection frame 2 and is used to adjust the deflection angle of the deflection frame 2, thereby adjusting the position of the printing media.
[0027] In this embodiment, refer to Figure 1 and Figure 2 As shown, the printing medium is wound around the tension adjustment mechanism and the guide roller 23. As the printing operation progresses and the tension of the printing medium changes, the tension adjustment mechanism can be used to adjust the tension of the printing medium, ensuring it is under suitable tension and thus improving print quality. During printing, if the edge of the printing medium deviates from the edge of the print head, which was initially parallel, the deflection angle of the deflection frame 2 in the horizontal plane can be adjusted using the deflection adjustment mechanism. Since the printing medium is wound around the tension adjustment mechanism and guide roller 23 mounted on the deflection frame 2, the deflection angle of the printing medium is adjusted to ensure that the edge of the printing medium is parallel to the edge of the print head, thus preventing skewing of the printed image.
[0028] This utility model provides a printing media position and tension adjustment device for printers, which allows manual adjustment of the deflection position and tension of the printing media during the printing process, thereby improving printing quality and providing convenient operation.
[0029] Example 2:
[0030] Based on Embodiment 1, the tension adjustment mechanism includes a tension handwheel 41, a reducer 42, and an eccentric roller 43. The two ends of the eccentric roller 43 are rotatably mounted on the deflection frame 2, and one end of the eccentric roller 43 is fixedly connected to the tension handwheel 41 through the reducer 42.
[0031] In this embodiment, refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the axis of the eccentric roller 43 is parallel to the axis of the guide roller 23, and the printing medium is wound around the eccentric roller 43 and the guide roller 23. During the printing process, when adjusting the tension of the printing medium, the tension handwheel 41 is turned, and the eccentric roller 43 is rotated by a certain angle through the reducer 42. This causes the axis of the eccentric roller 43 to move away from or closer to the guide roller 23, thereby stretching or relaxing the printing medium wound around the eccentric roller 42 and the guide roller 23, thus completing the adjustment of the tension of the printing medium.
[0032] The tension adjustment mechanism in this embodiment can adjust the tension of the printing medium at any time during the printing process. It is easy to operate and the adjustment results are reliable.
[0033] Furthermore, the deflection frame 2 includes a deflection support plate 21, with deflection end plates 22 respectively installed at the front and rear ends of the deflection support plate 21. The eccentric roller 43 is installed between the two deflection end plates 22, and the two ends of the eccentric roller 43 are rotatably connected to the deflection end plates 22 respectively. The reducer 42 is installed on the outside of one of the deflection end plates 22, with one end of the reducer 42 connected to one end of the eccentric roller 43 and the other end connected to the tension handwheel 41.
[0034] Furthermore, the two ends of the eccentric roller 43 are rotatably connected to the deflection end plate 22 via bearings.
[0035] Furthermore, the guide roller 23 is installed between the two deflection end plates 22, and its two ends are rotatably connected to the deflection end plates 22.
[0036] Furthermore, the two ends of the guide roller 23 are rotatably connected to the deflection end plate 22 via bearings.
[0037] Example 3:
[0038] Based on Example 1 or 2, refer to Figure 3 and Figure 4As shown, the deflection adjustment mechanism includes a deflection handwheel 31, a deflection adjustment rod 32, a deflection pull shaft 33, a deflection rotating shaft 35, and a deflection positioning mechanism. The upper end of the deflection pull shaft 33 is rotatably connected to the deflection frame 2. One end of the deflection adjustment rod 32 is threadedly connected to the lower end of the deflection pull shaft 33, and the other end is rotatably connected to the bottom frame 1. The deflection handwheel 31 is installed at the end of the deflection adjustment rod 32. The lower end of the deflection rotating shaft 35 is rotatably connected to the bottom frame 1, and the upper end is fixedly connected to the deflection frame 2. One end of the deflection positioning mechanism is rotatably connected to the deflection frame 2, and the other end is rollingly connected to the bottom frame 1.
[0039] In this embodiment, when adjusting the deflection position of the printing medium in the horizontal plane, the deflection handwheel 31 is turned so that the length of the end of the deflection adjustment rod 32 extending out of the deflection pull shaft 33 becomes longer or shorter, thereby pulling the deflection frame 2 to rotate around the deflection shaft 35, so as to adjust the deflection angle of the deflection frame 2 in the horizontal plane, thereby adjusting the deflection angle of the printing medium surrounding the eccentric shaft 43 and the guide roller 23, thereby adjusting the edge of the printing medium to be parallel to the edge of the printing nozzle, thereby avoiding the skewing of the printed pattern.
[0040] Furthermore, the upper end of the deflection pull shaft 33 is rotatably connected to the deflection frame 2 via a deflection bearing and a deflection bearing seat 34.
[0041] Furthermore, the upper end of the deflection pull shaft 33 is rotatably connected to the deflection support plate 21.
[0042] Furthermore, the lower end of the deflection shaft 35 is rotatably connected to the bottom frame 1 via a bearing and a deflection bearing seat 34.
[0043] Furthermore, the deflection positioning mechanism includes a deflection positioning block 36 and a cam follower 37. The upper end of the deflection positioning block 36 is fixedly connected to the bottom of the deflection frame 2. The bottom frame 1 includes a bottom fixing plate 13. The cam follower 37 is installed on the upper and lower ends of one side of the deflection positioning block 36. The deflection positioning block 36 can move relative to the bottom fixing plate 13. The circumferential surfaces of the two cam followers 37 on the deflection positioning block 36 abut against the upper and lower end surfaces of the bottom fixing plate 13, respectively.
[0044] Furthermore, the number of the deflection positioning mechanisms is four, and they are respectively located at the four corners of the bottom of the deflection frame 2.
[0045] Furthermore, the four corners of the bottom fixing plate 13 are respectively provided with receiving holes 131, which are used to receive the deflection positioning block 36 and match the movement trajectory of the deflection positioning block 36.
[0046] In this embodiment, when adjusting the deflection position of the deflection frame 2, the deflection handwheel 31 is turned so that the length of the end of the deflection adjustment rod 32 extending out of the deflection pull shaft 33 becomes longer or shorter, thereby pulling the deflection frame 2 to rotate around the deflection shaft 35. This causes the four deflection positioning blocks 36 installed at the bottom of the deflection frame 2 to move within the receiving hole 131 with the deflection shaft 35 as the center. At the same time, the two cam followers 37 on each deflection positioning block 36 roll along the upper and lower end faces of the bottom fixing plate 13, so that the deflection movement of the deflection frame 2 always remains parallel to the bottom fixing plate 13, avoiding the upper and lower surfaces of the deflection frame 2 from being tilted relative to the horizontal plane and forming an angle.
[0047] Furthermore, a deflection rod seat 38 is installed at one end of the bottom frame 1, and the end of the deflection adjustment rod 32 is fixedly installed on the deflection rod seat 38.
[0048] Furthermore, the bottom frame 1 includes a base plate 11 disposed below the bottom fixing plate 13, and bottom side plates 12 are vertically disposed at the left and right ends of the base plate 11, and the bottom fixing plate 13 is installed on the upper end of the bottom side plates 12.
[0049] Furthermore, the bottom side plate 12 is provided with a groove, which is used to avoid the movement of the deflection positioning block 36.
[0050] It should be noted that the above detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0052] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0053] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.
[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.
[0055] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein.
[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 printing media position and tension adjustment device for a printer, characterized in that: The device includes a base frame (1), a deflection frame (2), a deflection adjustment mechanism, and a tension adjustment mechanism. The deflection frame (2) is located above the base frame (1). Several guide rollers (23) are provided on the deflection frame (2). The guide rollers (23) are used to wind the printing medium. The tension adjustment mechanism is also located on the deflection frame (2) and is used to wind the printing medium and adjust the tension of the printing medium. The deflection adjustment mechanism is located between the base frame (1) and the deflection frame (2). The deflection adjustment mechanism is used to adjust the deflection angle of the deflection frame (2) to adjust the position of the printing medium.
2. The printing media position and tension adjustment device for a printer according to claim 1, characterized in that: The tension adjustment mechanism includes a tension handwheel (41), a reducer (42), and an eccentric roller (43). The two ends of the eccentric roller (43) are rotatably mounted on the deflection frame (2). One end of the eccentric roller (43) is fixedly connected to the tension handwheel (41) through the reducer (42).
3. The printing media position and tension adjustment device for a printer according to claim 2, characterized in that: The deflection frame (2) includes a deflection support plate (21), and deflection end plates (22) are respectively installed at the front and rear ends of the deflection support plate (21). The eccentric roller (43) is installed between the two deflection end plates (22), and the two ends of the eccentric roller (43) are rotatably connected to the deflection end plates (22). The reducer (42) is installed on the outside of one of the deflection end plates (22). One end of the reducer (42) is connected to one end of the eccentric roller (43), and the other end is connected to the tension handwheel (41).
4. The printing media position and tension adjustment device for a printer according to claim 3, characterized in that: The guide roller (23) is installed between the two deflection end plates (22), and its two ends are rotatably connected to the deflection end plates (22).
5. The printing media position and tension adjustment device for a printer according to claim 1, characterized in that: The deflection adjustment mechanism includes a deflection handwheel (31), a deflection adjustment rod (32), a deflection pull shaft (33), a deflection rotating shaft (35), and a deflection positioning mechanism. The upper end of the deflection pull shaft (33) is rotatably connected to the deflection frame (2). One end of the deflection adjustment rod (32) is threadedly connected to the lower end of the deflection pull shaft (33), and the other end is rotatably connected to the bottom frame (1). The deflection handwheel (31) is installed at the end of the deflection adjustment rod (32). The lower end of the deflection rotating shaft (35) is rotatably connected to the bottom frame (1), and the upper end is fixedly connected to the deflection frame (2). One end of the deflection positioning mechanism is rotatably connected to the deflection frame (2), and the other end is rolledly connected to the bottom frame (1).
6. The printing media position and tension adjustment device for a printer according to claim 5, characterized in that: The upper end of the deflection pull shaft (33) is rotatably connected to the deflection frame (2) through a deflection bearing and a deflection bearing seat (34).
7. The printing media position and tension adjustment device for a printer according to claim 5, characterized in that: The deflection positioning mechanism includes a deflection positioning block (36) and a cam follower (37). The upper end of the deflection positioning block (36) is fixedly connected to the bottom of the deflection frame (2). The bottom frame (1) includes a bottom fixing plate (13). The cam follower (37) is installed on the upper and lower ends of one side of the deflection positioning block (36). The deflection positioning block (36) can move relative to the bottom fixing plate (13). The circumferential surfaces of the two cam followers (37) on the deflection positioning block (36) abut against the upper and lower end surfaces of the bottom fixing plate (13), respectively.
8. The printing media position and tension adjustment device for a printer according to claim 7, characterized in that: The number of the deflection positioning mechanisms is four, and they are respectively set at the four corners of the bottom of the deflection frame (2).
9. A printing media position and tension adjustment device for a printer according to claim 8, characterized in that: The bottom fixing plate (13) is provided with receiving holes (131) at its four corners. The receiving holes (131) are used to receive the deflection positioning block (36) and match the movement trajectory of the deflection positioning block (36).
10. A printing media position and tension adjustment device for a printer according to claim 5, characterized in that: One end of the base frame (1) is equipped with a deflection rod seat (38), and the end of the deflection adjustment rod (32) is fixedly installed on the deflection rod seat (38).