Structure for preventing first black line of printer and printer
By designing the elastic pressing end of the buffer in the label printer, the problem of the first black line caused by the sudden tension of the paper when the printer starts printing is solved, and the effect of slowly tightening the paper when starting is achieved to avoid the black line phenomenon.
Patent Information
- Application Number
- CN202422122855.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-30
AI Technical Summary
When the existing label printer starts printing, the paper roll needs to change from a static state to a moving state, resulting in the label paper need to overcome inertia, and suddenly tighten, which can easily lead to the printing black line of the first label paper.
A first-hand black wire structure for printers is designed, including a casing, paper-feeding rollers and buffers. The buffer member is installed in the paper-feeding passage and has an elastic pressing end. The paper is elastically pressed by the elastic pressing end, so that the paper is slowly tightened and slowly raised during the tensioning process to avoid sudden tension.
Through the elastic action of the elastic pressing end, the paper will not suddenly tighten during the process from stationary to movement, which solves the problem of black lines appearing on the first sheet of the printer, and the structure is simple and cost-saving.
Smart Images
Figure CN222933588U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printers, in particular to a structure for preventing the first black line for a printer and a printer. Background Art
[0002] A label printer is a device that uses thermal or thermal transfer methods to print various image information such as barcodes, two-dimensional codes, graphics, and text on labels, and is widely used in fields such as POS terminal systems, banking systems, and medical instruments.
[0003] For example, Patent CN217294009U discloses a label printer, which includes a housing, a paper bin and a driving force output member located in the housing, and a paper feed roller rotatably located on the label paper feed channel, and also includes a transmission mechanism for transmitting the driving force output member to the paper feed roller; when observing in the left-right direction of the label printer, at least a part of the transmission mechanism coincides with the paper bin, so that the space inside the label printer can be fully utilized, and thus the overall size of the label printer can be effectively controlled.
[0004] However, when the printer starts to print, the paper roll needs to change from a completely stationary state to a moving state. In this process, the label paper needs to overcome the inertia of the paper roll, so that the label paper will be suddenly tightened from a relaxed state, resulting in the phenomenon of printing black lines on the first label paper, especially when the paper roll is heavy, the phenomenon is particularly obvious. Summary of the Utility Model
[0005] The purpose of the utility model is to overcome the above technical deficiencies, and propose a structure for preventing the first black line for a printer, so as to solve the technical problem that when the printer starts to print, the paper roll needs to change from a completely stationary state to a moving state, and in this process, the label paper needs to overcome the inertia of the paper roll, so that the label paper will be suddenly tightened from a relaxed state, resulting in the phenomenon of printing black lines on the first label paper in the prior art.
[0006] To achieve the above technical purpose, the utility model adopts the following technical solutions:
[0007] In the first aspect, the utility model provides a structure for preventing the first black line for a printer, including:
[0008] A machine shell having a connected paper bin and a paper feed channel;
[0009] A paper feed roller rotatably arranged in the paper feed channel, and forming a paper feed gap for the paper to pass through with the inner wall of the paper feed channel, and capable of driving the paper to move along the direction from the paper bin to the paper feed channel when rotating; and
[0010] A buffer member is provided in the paper feeding channel, located between the paper feeding roller and the paper bin, and has an elastic pressing end for elastically pressing against the paper.
[0011] In some embodiments, the buffer member includes a buffer plate and a buffer spring. The buffer plate is rotatably installed in the paper feeding channel, and its two ends in the radial direction of its rotating part are a working end and a connecting end. The buffer spring connects the connecting end and the inner wall of the paper feeding channel and drives the working end to elastically press against the paper;
[0012] Wherein, the working end constitutes the elastic pressing end.
[0013] In some embodiments, the elastic pressing end and the paper feeding roller are arranged in sequence along the radial direction of the paper feeding roller and are located on opposite sides of the paper.
[0014] In some embodiments, a mounting seat is provided on an inner wall of the paper feeding channel in the radial direction of the paper feeding roller. The mounting seat is located between the paper feeding roller and the paper bin and is provided with a shaft hole, and one side of the shaft hole away from the paper feeding roller is open;
[0015] The rotating part of the buffer plate is a rotating shaft, and the rotating shaft is placed in the shaft hole from the opening.
[0016] In some embodiments, the rotating shaft is located at the edge of the connecting end. The connecting end is provided with an avoidance opening corresponding to the mounting seat, and the avoidance opening is located on the side of the rotating shaft close to the elastic pressing end;
[0017] The connecting end is provided with a connecting plate. The connecting plate is located on the side of the rotating shaft away from the avoidance opening, and the buffer spring is connected between the connecting plate and the inner wall of the paper feeding channel.
[0018] In some embodiments, the connecting plate includes a main body section and an anti - detachment section. The main body section is connected to the connecting end, and the anti - detachment section is connected to the main body section and extends in a direction away from the paper feeding roller;
[0019] The buffer spring is a tension spring. One end of the tension spring is sleeved on the main body section, and the other end is connected to the inner wall of the paper feeding channel and is located on the side of the buffer plate close to the paper feeding roller.
[0020] In some embodiments, a stop block is provided at the connecting end, and a mating block is provided on the inner wall of the paper feeding channel corresponding to the stop block. When the elastic pressing end presses against the paper, the mating block is spaced on the side of the stop block close to the paper feeding roller.
[0021] In some embodiments, an arc - shaped plate is connected to the elastic pressing end. The arc - shaped convex surface of the arc - shaped plate faces the paper feeding roller and is used for pressing against the paper.
[0022] In some embodiments, the buffer member further includes a plurality of rib plates, and the plurality of rib plates are connected to the concave surface of the arc plate and are arranged at intervals along the width direction of the arc plate.
[0023] In a second aspect, the present invention further provides a printer, which includes the structure for preventing the first black line for a printer as described in any one of the above.
[0024] Compared with the prior art, in the structure for preventing the first black line for a printer provided by the present invention, when the printer starts to work, the paper feed roller rotates and drives the paper in the paper bin to move towards the paper feed channel. During this process, the paper is always elastically pressed by the elastic pressing end of the buffer member, so that the paper is slowly tightened and the elastic pressing end is slowly lifted. Thus, under the elastic action of the elastic pressing end, the paper will not suddenly tighten during the process from rest to movement, thereby solving the problem of the first black line appearing in the printer, and the structure is simple and the cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is an exploded view of the structure for preventing the first black line for a printer provided by an embodiment of the present invention;
[0026] Figure 2 is Figure 1 a cross-sectional view of the structure for preventing the first black line for a printer in
[0027] Figure 3 is Figure 2 a partial schematic view of the structure for preventing the first black line for a printer in
[0028] Figure 4 is Figure 1 a partial structural schematic view of the structure for preventing the first black line for a printer in
[0029] Figure 5 is Figure 3 a schematic view of the buffer plate in
[0030] Figure 6 is Figure 1 a partial structural schematic view of the machine case in
[0031] Figure 7 is Figure 6 an enlarged schematic view of part A in
[0032] Figure 8 is Figure 3 a schematic view of the tension spring in
[0033] Description of the reference numerals:
[0034] 1. Housing; 1a. Paper bin; 1b. Paper feed channel; 11. Mounting base; 11a. Shaft hole; 12. Fixed plate; 13. Fitting block; 2. Paper feed roller; 3. Buffer member; 31. Elastic pressing end; 32. Buffer plate; 321. Working end; 322. Connection end; 322a. Avoidance opening; 323. Rotating shaft; 324. Connecting plate; 325. Main body section; 326. Anti - detachment section; 327. Stopping block; 33. Buffer spring; 331. Tension spring; 34. Arc plate; 35. Rib plate; 4. Paper. Detailed implementation manners
[0035] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0036] In order to solve the technical problem in the prior art that when a printer starts to print, the paper roll needs to change from a completely stationary state to a moving state. In this process, the label paper needs to overcome the inertia of the paper roll, so that the label paper will be suddenly tightened from a relaxed state, resulting in the phenomenon that the first label paper is prone to printing black lines. The present utility model provides a structure for preventing the first black line in a printer. Under the elastic action of the elastic pressing end, the label paper will not suddenly tighten during the process from stationary to moving, thereby solving the problem of the first black line appearing in the printer, and the structure is simple and cost - saving.
[0037] It should be noted that the structure for preventing the first black line in the printer described in the present utility model is applicable to but not limited to printers, etc. For the convenience of description, in the present utility model, only the case where the structure for preventing the first black line in the printer is applied to a printer is taken as an example for description. The principle of applying the structure for preventing the first black line in the printer to other types of devices is essentially the same as that applied to the printer, and will not be elaborated here one by one.
[0038] Please refer to Figures 1 to 4 , Figures 1 to 4 which is a schematic structural diagram of the structure for preventing the first black line in a printer according to an embodiment of the present utility model. The structure for preventing the first black line in a printer includes a housing 1, a paper feed roller 2 and a buffer member 3; the housing 1 has a paper bin 1a and a paper feed channel 1b that are connected and communicate with each other; the paper feed roller 2 is rotatably arranged in the paper feed channel 1b, and forms a paper feed gap for the paper 4 to pass through with the inner wall of the paper feed channel 1b, and can drive the paper 4 to move along the direction from the paper bin 1a to the paper feed channel 1b when rotating; the buffer member 3 is arranged in the paper feed channel 1b and is located between the paper feed roller 2 and the paper bin 1a, and has an elastic pressing end 31. The elastic pressing end 31 is used to elastically press against the paper 4 and can drive the paper 4 located between the paper feed roller 2 and the paper bin 1a to be tightened.
[0039] In the structure for preventing the first-page black line of the printer provided by the present utility model, when the printer starts to work, the paper feed roller 2 rotates and drives the paper 4 in the paper bin 1a to move towards the paper feed channel 1b. During this process, the paper 4 is always elastically pressed by the elastic pressing end 31 of the buffer member 3, so that the paper 4 is slowly tightened and the elastic pressing end 31 is slowly lifted. Thus, under the elastic action of the elastic pressing end 31, the paper 4 will not suddenly tighten during the process from rest to movement, thereby solving the problem of the first-page black line of the printer, and the structure is simple and the cost is saved.
[0040] In one embodiment, please refer to Figure 3 and Figure 5 , the buffer member 3 includes a buffer plate 32 and a buffer spring 33. The buffer plate 32 is rotatably installed in the paper feed channel 1b, and the two ends of it in the radial direction of its rotation part are a working end 321 and a connection end 322. The buffer spring 33 connects the connection end 322 and the inner wall of the paper feed channel 1b, and drives the working end 321 to elastically press against the paper 4; wherein, the working end 321 constitutes the elastic pressing end 31.
[0041] In this embodiment, the buffer spring 33 makes the buffer plate 32 have a tendency to rotate, so that the working end 321 of the buffer plate 32 can elastically press against the paper 4, enabling the paper 4 to be slowly tightened when rotating from rest, and the structure is simple and reliable.
[0042] In one embodiment, the elastic pressing end 31 and the paper feed roller 2 are arranged in sequence along the radial direction of the paper feed roller 2 and are located on opposite sides of the paper 4.
[0043] In this embodiment, the elastic pressing end 31 and the paper feed roller 2 are placed on opposite sides of the paper 4 to ensure that the paper 4 can be slowly tightened during the process from rest to rotation, and at the same time, it also increases the acting force of the paper 4 on the paper feed roller 2 to ensure that the paper feed roller 2 can effectively drive the paper 4 to move when rotating.
[0044] In one embodiment, please refer to Figure 6 and Figure 7 , an installation seat 11 is provided on an inner wall of the paper feed channel 1b in the radial direction of the paper feed roller 2. The installation seat 11 is located between the paper feed roller 2 and the paper bin 1a and is provided with a shaft hole 11a. The shaft hole 11a is open on the side away from the paper feed roller 2; the rotation part of the buffer plate 32 is a rotating shaft 323, and the rotating shaft 323 is placed in the shaft hole 11a from the opening.
[0045] In this embodiment, during assembly, the rotating shaft 323 on the buffer plate 32 is placed in the shaft hole 11a from the opening of the installation seat 11, and the operation is simple and convenient. And under the action of the buffer spring 33, it can prevent the rotating shaft 323 from disengaging from the shaft hole 11a from the opening, improving the installation stability of the rotating shaft 323.
[0046] In one embodiment, the rotating shaft 323 is located at the edge of the connecting end 322. The connecting end 322 is provided with an avoidance opening 322a corresponding to the mounting base 11. The avoidance opening 322a is located on the side of the rotating shaft 323 close to the elastic pressing end 31. The connecting end 322 is provided with a connecting plate 324. The connecting plate 324 is located on the side of the rotating shaft 323 away from the avoidance opening 322a. The buffer spring 33 is connected to the connecting plate 324 and the inner wall of the paper feeding channel 1b.
[0047] In this embodiment, the rotating shaft 323 is placed at the edge of the connecting end 322, and the avoidance opening 322a for avoiding the mounting base 11 is correspondingly arranged, so that the structure of the buffer plate 32 is more compact, the space occupied by the buffer plate 32 is reduced, and it is convenient for the printer to achieve a small volume.
[0048] In one embodiment, please refer to Figure 7 and Figure 8 , the connecting plate 324 includes a main body section 325 and an anti-disengagement section 326. The main body section 325 is connected to the connecting end 322. The anti-disengagement section 326 is connected to the main body section 325 and extends in a direction away from the paper feeding roller 2. The buffer spring 33 is a tension spring 331. One end of the tension spring 331 is sleeved on the main body section 325, and the other end is connected to the inner wall of the paper feeding channel 1b and is located on the side of the buffer plate 32 close to the paper feeding roller 2.
[0049] In this embodiment, one end of the tension spring 331 is directly sleeved on the main body section 325 of the connecting plate 324, and the anti-disengagement section 326 is used to limit the tension spring 331 from disengaging from the main body section 325, improving the assembly convenience. It should be noted that in this solution, the connection method of the tension spring 331 to the inner wall of the paper feeding channel 1b is the same as its connection direction to the connecting plate 324. Specifically, a fixing plate 12 is provided on the inner wall of the paper feeding channel 1b. The structure of the fixing plate 12 is similar to that of the connecting plate 324 for the tension spring 331 to be installed.
[0050] In one embodiment, the connecting end 322 is provided with a stop block 327. The inner wall of the paper feeding channel 1b is provided with a mating block 13 corresponding to the stop block 327. When the elastic pressing end 31 presses against the paper 4, the mating block 13 is spaced on the side of the stop block 327 close to the paper feeding roller 2.
[0051] In this embodiment, when there is no paper 4 in the printer, the elastic pressing end 31 of the buffer plate 32 continues to rotate until the stop block 327 is blocked by the mating block 13, so as to limit the excessive rotation of the buffer plate 32 and cause the tension spring 331 to disengage from the anti-disengagement section 326. At the same time, it is also convenient to reset the buffer plate 32 and reinstall the paper 4, improving the convenience.
[0052] In one embodiment, the elastic pressing end 31 is connected with an arc-shaped plate 34. The arc-shaped convex surface of the arc-shaped plate 34 faces the paper feeding roller 2 and is used to press against the paper 4.
[0053] In this embodiment, an arc-shaped plate 34 is provided at the elastic pressing end 31, and the arc-shaped convex surface of the arc-shaped plate 34 is pressed against the paper 4, reducing the resistance of the buffer member 3 to the paper 4 and making the paper feeding of the paper 4 smoother.
[0054] In one embodiment, the buffer member 3 further includes a plurality of rib plates 35. The plurality of rib plates 35 are connected to the concave surface of the arc-shaped plate 34 and are spaced apart along the width direction of the arc-shaped plate 34.
[0055] In this embodiment, a plurality of rib plates 35 are also correspondingly provided inside the arc-shaped plate 34 to improve the strength of the arc-shaped plate 34, prevent accidental breakage of the arc-shaped plate 34, and extend the service life of the buffer member 3.
[0056] In addition, the present utility model also provides a printer, which includes the structure for preventing the first-page black line for a printer as described in any one of the above. It should be noted that the detailed structure of the structure for preventing the first-page black line for a printer of the printer can refer to the embodiments of the structure for preventing the first-page black line for a printer above, and will not be elaborated here; since the above structure for preventing the first-page black line for a printer is used in the printer of the present utility model, therefore, the embodiments of the printer of the present utility model include all the technical solutions of all the embodiments of the above structure for preventing the first-page black line for a printer, and the achieved technical effects are also exactly the same, and will not be elaborated here.
[0057] For a better understanding of the present utility model, the following is combined with Figures 1 to 8 to elaborate on the technical solution of the present utility model in detail:
[0058] In this solution, the rotating shaft 323 is placed in the shaft hole 11a of the mounting seat 11, so that the elastic pressing end 31 of the buffer plate 32 can rotate around the rotating shaft 323, and one end of the tension spring 331 is connected to the main body section 325, and the other end is connected to the inner wall of the paper feeding channel 1b and is located on the side of the buffer plate 32 close to the paper feeding roller 2, so as to be able to drive the elastic pressing end 31 to gently elastically press against the paper 4, making the paper 4 always in a slightly taut state. In this way, when the motor is started to drive the paper feeding roller 2 to rotate, the buffer plate 32 can play a good buffering role, avoiding the paper 4 from being suddenly taut, and thus solving the problem of the first-page printed black line of the paper 4.
[0059] The above specific implementation manners of the present utility model do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included in the protection scope of the claims of the present utility model.
Claims
1. A structure for preventing first-sheet black lines for a printer, characterized in that: include: The casing has a connected paper bin and a paper feeding passage; a paper feed roller, rotatably disposed on the paper feed passage, and forming a paper feed gap with the inner wall of the paper feed passage for paper to pass through, and capable of driving the paper to move along the direction from the paper bin to the paper feed passage when rotating; and The buffer is arranged in the paper feeding passage and is located between the paper feeding roller and the paper bin, and has an elastic pressing end, and the elastic pressing end is used for elastically pressing against the paper.
2. The structure for preventing first sheet black line for a printer according to claim 1, characterized in that: The buffer member includes a buffer plate and a buffer spring. The buffer plate is rotatably mounted on the paper feeding channel, and two ends of the buffer plate located in the radial direction of its own rotating part are a working end and a connecting end. The buffer spring connects the connecting end and the inner wall of the paper feeding channel and drives the working end to elastically press against the paper. Wherein, the working end constitutes the elastic pressing end.
3. The structure for preventing first sheet black line for a printer according to claim 2, characterized in that: The elastic pressing end and the paper feeding roller are sequentially arranged along the radial direction of the paper feeding roller and are located on two opposite sides of the paper.
4. The structure for preventing first sheet black line for a printer according to claim 3, characterized in that: The paper feeding passage is provided with a mounting seat on an inner wall in the radial direction of the paper feeding roller, the mounting seat is located between the paper feeding roller and the paper bin, and is provided with an axial hole, the axial hole is open on a side away from the paper feeding roller; The rotating part of the buffer plate is a rotating shaft, and the rotating shaft is placed in the shaft hole from the opening.
5. The structure for preventing first sheet black line for a printer according to claim 4, characterized in that: The rotating shaft is located at the end edge of the connecting end, and the connecting end is provided with an escape opening corresponding to the mounting seat, and the escape opening is located on a side of the rotating shaft close to the elastic pressing end; The connecting end is provided with a connecting plate, the connecting plate is located at a side of the rotating shaft away from the avoidance opening, and the buffer spring is connected to the connecting plate and the inner wall of the paper feeding channel.
6. The structure for preventing first sheet black line for a printer according to claim 5, characterized in that: The connecting plate includes a main body section and an anti-slip section, wherein the main body section is connected to the connecting end, and the anti-slip section is connected to the main body section and extends in a direction away from the paper feed roller; The buffer spring is a tension spring, one end of which is sleeved on the main body section, and the other end of which is connected to the inner wall of the paper feeding channel and is located on a side of the buffer plate close to the paper feeding roller.
7. The structure for preventing first sheet black line for a printer according to claim 6, characterized in that: The connection end is provided with a stop block, and the inner wall of the paper feeding channel is provided with a matching block corresponding to the stop block. When the elastic pressing end is pressed against the paper, the matching block is spaced apart at one side of the stop block close to the paper feeding roller.
8. The structure for preventing first-sheet black line in a printer according to claim 1, characterized in that: The elastic pressing end is connected with an arc plate, the arc convex surface of the arc plate faces the paper feeding roller and is used for pressing against the paper.
9. The structure for preventing first-sheet black line in a printer according to claim 8, characterized in that: The buffer member further comprises a plurality of ribs, which are connected to the concave surface of the arc-shaped plate and are arranged at intervals along the width direction of the arc-shaped plate.
10. A printer, characterized in that: The invention comprises a structure for preventing first-sheet black line for a printer as described in any one of claims 1 to 9.