CN111098606A

CN111098606A - Printer and printing method

Info

Publication number: CN111098606A
Application number: CN201911342161.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Xiamen Yijiayi Intelligent Technology Co ltd
Current assignee: Xiamen Hanyin Electronic Technology Co Ltd
Priority date: 2018-12-27
Filing date: 2019-12-23
Publication date: 2020-05-05
Also published as: CN211892506U

Abstract

The invention discloses a printer, which comprises a shell, a paper scroll and a paper outlet, wherein the paper scroll is arranged in the shell and used for placing a printing paper roll, the paper outlet is formed in the shell, and a paper feeding channel for the running of printing paper is formed between the paper scroll and the paper outlet; the paper feeding device also comprises a buffer structure arranged in the paper feeding channel, wherein the buffer structure comprises a contact surface which is used for contacting with printing paper so as to bear the pressure applied by the printing paper; when the printing paper is fed in the printing channel in the forward direction, the pressure exerted by the printing paper enables the buffer structure to be in a first state; when the printing paper is reversely fed in the printing channel, the buffer structure is in a second state by the pressure exerted by the printing paper, and the compression degree of the first state is greater than that of the second state. The invention can improve the problem of printing abnormity possibly generated when the printing paper rolls back.

Description

Printer and printing method

Technical Field

The invention relates to the technical field of printing, in particular to a printer.

Background

In some printers, such as label printers, in order to increase the printing space of labels, a function of label rollback is often added to the printer. The general working process is as follows:

(1) the printer controls the rubber roller to rotate in the forward direction so as to pull the label paper to advance to the paper outlet; at the moment, the paper between the rubber roller and the paper roll is in a tensioning state;

(2) after the current label paper is printed, the printer controls the rubber roller to rotate reversely, so that the label paper is retracted towards the paper roll direction, and at the moment, the paper between the rubber roller and the paper roll is in a loose state;

(3) after the rollback operation is executed, when the next label paper is printed, the printer controls the rubber roller to rotate in the forward direction again, so that the loose paper section from the rubber roller to the paper roll is tensioned along with the movement of the rubber roller.

Disclosure of Invention

The inventor finds that the paper is driven by the rubber roller to move through the friction force between the rubber roller and the paper in the process of implementing the invention. In the process of the third step, when the paper is loosened to be tight, the force of the paper on the rubber roller is suddenly changed (the rubber roller does not drive the paper roll and the required tension for driving the paper roll is different) at the moment when the paper is tightened, and the sudden change can cause the contact position of the paper and the rubber roller to be staggered, so that the paper deviates from the original printing position, and the abnormal printing is caused.

In view of this, the embodiment of the present invention provides a printer, which can improve the problem of abnormal printing that may occur when the printing paper rolls back.

The embodiment of the invention provides a printer, which comprises a shell, a paper reel arranged in the shell and used for placing a printing paper roll, and a paper outlet arranged on the shell, wherein a paper feeding channel for the running of printing paper is formed between the paper reel and the paper outlet; the paper feeding device also comprises a buffer structure arranged in the paper feeding channel, wherein the buffer structure comprises a contact surface which is used for contacting with printing paper so as to bear the pressure applied by the printing paper; when the printing paper is fed in the printing channel in the forward direction, the pressure exerted by the printing paper enables the buffer structure to be in a first state; when the printing paper is reversely fed in the printing channel, the buffer structure is in a second state by the pressure exerted by the printing paper, and the compression degree of the first state is greater than that of the second state.

Preferably, the buffer structure comprises a fixed shaft, an outer shaft sleeve and at least one elastic piece; the fixed shaft is fixed in the shell, the outer side of the outer shaft sleeve forms the contact surface, and the inner side of the outer shaft sleeve is elastically connected to the fixed shaft through the elastic piece.

Preferably, at least one first connection point is arranged on the inner side of the outer shaft sleeve; the buffer structure further comprises an inner shaft sleeve, and the fixed shaft is sleeved in the inner shaft sleeve; a guide groove is formed in one side, facing the outer shaft sleeve, of the inner shaft sleeve, and a second connecting point corresponding to the first connecting point is arranged in the guide groove; one end of the elastic piece is arranged on the first connecting point, and the other end of the elastic piece is arranged on the second connecting point.

Preferably, the inner shaft sleeve is in a U-shaped groove shape, and a through hole for sleeving the fixed shaft is formed in the groove bottom of the U-shaped groove.

Preferably, two lateral walls of interior axle sleeve are provided with at least a pair of trip, the inboard of outer axle sleeve still be provided with the bayonet socket that the trip corresponds, the trip block is in the bayonet socket.

Preferably, two outer side walls of the inner shaft sleeve are further provided with limiting parts, the inner side of the outer shaft sleeve is further provided with limiting grooves corresponding to the limiting parts, and the limiting parts are inserted into the limiting grooves.

Preferably, the buffer structure comprises an outer shaft sleeve and a torsion spring; the outer shaft sleeve comprises a fixed shaft and a contact plate connected with the fixed shaft; the fixed shaft is fixed in the shell and is provided with an opening close to the shell; the fixed end of the torsion spring is fixed on the shell; the main body part of the torsion spring is arranged in the opening, and the torsion arm of the torsion spring is abutted against the inner surface of the contact plate; the outer surface of the contact plate forms the contact surface.

Preferably, the fixed shaft is a hollow structure; the buffering structure further comprises a cover cap arranged at the top of the fixing shaft.

Preferably, the position of the buffer structure in the paper feeding passage is arranged close to the paper roller and far away from the paper outlet.

In this embodiment, by adding the buffer structure, the paper can gradually return to a relatively tensioned state from a relaxed state when retracting, that is, an abrupt force applied to the printing paper at the moment of tensioning can be decomposed into a gradual force. Therefore, the problem that under the interference of the sudden change force, the contact position of the printing paper and the rubber roller is dislocated, so that the printing paper deviates from the original printing position, and the printing is abnormal is solved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of an internal structure of a printer according to a first embodiment of the present invention.

Fig. 2 is a schematic combination diagram of the buffer structure of fig. 1.

Fig. 3 is an exploded schematic view of the buffer structure of fig. 2.

Fig. 4 is a schematic cross-sectional view of the cushioning structure of fig. 2.

Fig. 5 is a structural view of an outer hub in the buffering structure of fig. 2.

Fig. 6 is a structural view of an inner hub in the cushioning structure of fig. 2.

Fig. 7 is a schematic diagram of an internal structure of a printer according to a second embodiment of the present invention.

Fig. 8 is an assembly view of the buffer structure of fig. 7.

Fig. 9 is an exploded view of the buffer structure of fig. 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a printer according to a first embodiment of the present invention includes a housing, a paper spool 10 disposed in the housing and used for placing a printing paper roll 11, and a paper outlet 20 opened on the housing, wherein a paper feeding path for a printing paper 200 to travel is formed between the paper spool 10 and the paper outlet 20, a buffer structure 30 is disposed in the paper feeding path, the buffer structure 30 includes a contact surface 31 for contacting the printing paper 200 to receive a pressure applied by the printing paper 200, the buffer structure 30 is in a first state by the pressure applied by the printing paper 200 when the printing paper 200 is fed forward in the printing path (arrow ① in fig. 1), and the buffer structure 30 is in a second state by the pressure applied by the printing paper 200 when the printing paper 200 is fed backward in the printing path (arrow ② in fig. 1), and a compression degree of the first state is greater than a compression degree of the second state.

Specifically, referring to fig. 2 and fig. 3, in the present embodiment, the buffering structure 30 includes a fixing shaft 32, an outer shaft sleeve 33, and at least one elastic element 34; the fixed shaft 32 is fixed in the housing, the outer side of the outer sleeve 33 forms the contact surface 31, and the inner side of the outer sleeve 33 is elastically connected to the fixed shaft 32 through the elastic member 34.

The contact surface 31 is arc-shaped, and the surface thereof is usually required to be smooth, so as to ensure the normal paper feeding of the printing paper 200 without causing an excessive obstruction.

It should be noted that, in this embodiment, in general, the printer further includes a printing controller and a driving mechanism disposed in the casing, and a rubber roller and a printing head disposed in the paper feeding path; the printing controller is electrically connected with the driving mechanism, and the driving mechanism is in transmission connection with the rubber roller and the printing head. The driving mechanism can comprise at least one motor and a corresponding transmission gear, the motor is in transmission connection with the rubber roller or the printing head through the transmission gear, and the motor can control the rotation direction of the rubber roller or the up-and-down movement of the printing head under the control of the printing controller, so that each step in the printing process is realized. The more detailed structure can refer to the corresponding printers on the market, such as various typical label printers, and the detailed description of the invention is omitted here.

The operation principle of the present embodiment is described in detail below.

In this embodiment, when the printing paper 200 is fed forward in the printing channel, the printing paper 200 applies a pressure to the outer sleeve 33 through the contact surface 31, and the outer sleeve 33 moves toward the fixed shaft 32 under the pressure and presses the elastic member 34. When the elastic member 34 is compressed to a certain degree, the force is balanced, and the printing paper 200 will drive the printing paper roll 11 to rotate together to realize printing, and at this time, the buffer structure 30 or the elastic member 34 is in the first state. It should be noted that the first state is not a constant state, and is influenced by a plurality of factors, such as the degree of compression of the first state changing when the thickness of the roll on the paper roll 10 changes. In addition, the first state changes when the printer starts to start the forward paper feed and enters a relatively stable paper feed, but the first state is in a compressed state as a whole, and only the degree of compression may be different in different cases.

After printing the current printing paper (for example, printing a label), the printer controls the rubber roller to rotate reversely through the printing controller, so that the printing paper 200 is retracted even if the printing paper 200 is fed reversely in the printing channel. At this time, the printing paper 200 between the rubber roller and the printing paper roll 11 will become relatively loose, and therefore the pressure exerted by the printing paper 200 on the contact surface 31 will also become small (the pressure may be 0), and at this time, the outer sleeve 33 will move away from the fixed shaft 32, so that the printing paper 200 becomes tensioned again and the elastic member 34 is stressed to reach the equilibrium again, and at this time, the buffer structure 30 or the elastic member 34 is in the second state (the second state may be a completely uncompressed state, i.e. the pressure exerted by the printing paper 200 on the contact surface 31 is 0), and obviously, the compression degree of the elastic member 34 in the second state is smaller than that in the first state.

From the above analysis, it can be seen that by adding the buffer structure 30, the paper can gradually return from the relaxed state to the relatively tensioned state during the retraction, i.e. the sudden force applied to the printing paper 200 at the moment of being tensioned can be decomposed into a gradual force. Therefore, the problem that under the interference of the sudden force, the contact position of the printing paper 200 and the rubber roller is dislocated, so that the printing paper 200 deviates from the original printing position, and further the printing is abnormal is solved.

In order to facilitate an understanding of the invention, some preferred embodiments of the invention are described further below.

Referring to fig. 3 and fig. 6, on the basis of the above embodiment, in a preferred embodiment of the present invention:

at least one first connection point 331 is provided at the inner side of the outer sleeve 33; the buffer structure 30 further includes an inner shaft sleeve 35, and the fixed shaft 32 is sleeved in the inner shaft sleeve 35; a guide groove 351 is formed on one side of the inner sleeve 35 facing the outer sleeve 33, and a second connection point 352 corresponding to the first connection point 331 is provided in the guide groove 351; one end of the elastic member 34 is disposed on the first connection point 331, and the other end is disposed on the second connection point 352.

Specifically, in this embodiment, the inner sleeve 35 is substantially in a U-shaped groove shape, and at least one through hole 353 for sleeving the fixing shaft 32 is disposed at the bottom of the U-shaped groove, where the number of the through holes 353 may be one or multiple, and the present invention is not particularly limited as the case may be.

In this embodiment, the inner sleeve 35 is further provided with a second connection point 352 corresponding to the first connection point 331 on the through hole 353, and the structure of the U-shaped groove itself may form a part of the guide groove 351, so that the elastic member 34 may be elastically connected to the outer sleeve 33 and the inner sleeve 35 through the guide groove 351, the first connection point 331 and the second connection point 352, and the elastic member may only move within a range set by the guide groove 351, thereby guiding the moving direction of the outer sleeve 33, and avoiding abnormal printing caused by shaking or shaking of the outer sleeve 33 during moving.

On the basis of the above-described embodiment, in a preferred embodiment of the present invention:

at least one pair of clamping hooks 354 are arranged on two outer side walls of the inner shaft sleeve 35, a clamping opening 333 corresponding to the clamping hooks 354 is further arranged on the inner side of the outer shaft sleeve 33, and the clamping hooks 354 are clamped in the clamping opening 333 to achieve connection of the inner shaft sleeve 35 and the outer shaft sleeve 33.

two outer side walls of the inner shaft sleeve 35 are further provided with limiting parts 355, the inner side of the outer shaft sleeve 33 is further provided with limiting grooves 334 corresponding to the limiting parts 355, and the limiting parts 355 are inserted into the limiting grooves 334.

The limiting groove 334 can be formed by arranging a reinforcing rib on the inner side of the outer shaft sleeve 33 in a matching manner, and the limiting part 355 is matched with the limiting groove 334, so that the outer shaft sleeve 33 and the inner shaft sleeve 35 can be stably connected and are not easy to shake.

the position of the buffering structure 30 in the paper feeding path is arranged close to the paper roll 10 and far away from the paper outlet 20.

Wherein, when the printing paper 200 is rolled back, the loose portion of the printing paper 200 is generated from the paper output port 20. If the buffer structure 30 is disposed close to the sheet discharge port 20, the buffer structure 30 may exert a large abrupt force on the printing sheet 200 during buffering due to an insufficient buffering distance. However, when the position of the buffer structure 30 is far away from the paper outlet 20, the buffer structure 30 can gradually decompose the abrupt force into smaller stress during buffering due to a larger buffering distance, thereby further improving the printing effect.

preferably, the elastic member 34 is a compression spring, and the number of the compression springs is two, and the two compression springs are arranged at two opposite ends of the outer sleeve.

The two opposite ends of the outer shaft sleeve 33 are respectively provided with a pressure spring, so that the two ends of the buffer structure 30 are stressed uniformly, and the condition that the contact surface 31 of the buffer structure 30 is inclined due to nonuniform stress is avoided.

Referring to fig. 7 to 9, a second embodiment of the present invention provides another printer, which is different from the first embodiment in that in the present embodiment, the buffering structure 230 includes an outer sleeve 231 and a torsion spring 232; the outer sleeve 231 includes a fixed shaft 233 and a contact plate 234 connected to the fixed shaft 233; the fixed shaft 233 is fixed in the casing, and the fixed shaft 233 is provided with an opening 235 near the casing; the fixed end 236 of the torsion spring 232 is fixed on the casing; the main body portion 237 of the torsion spring 232 is disposed in the opening 235, and the torsion arm 238 of the torsion spring 232 abuts against the inner surface of the contact plate 234; the outer surface of the contact plate 234 forms a contact surface 239.

The fixing shaft 233 may have a hollow structure, and a cap 240 may be fixed to the top of the fixing shaft.

The operation principle of the present embodiment is described in detail below.

In this embodiment, when the printing paper 200 is fed forward in the printing channel, the printing paper 200 applies a pressure to the contact plate 234 via the contact surface 239, and the contact plate 234 rotates counterclockwise (or inward) around the fixed shaft 233 under the pressure and presses the torsion spring 232. When the torsion spring 232 is compressed to a certain degree, the force is balanced, the printing paper 200 drives the printing paper roll 11 to rotate together to realize printing, and at this time, the buffer structure 30 or the torsion spring 232 is in the first state.

After printing the current printing paper (for example, printing a label), the printer controls the rubber roller to rotate reversely through the printing controller, so that the printing paper 200 is retracted even if the printing paper 200 is fed reversely in the printing channel. At this time, the printing paper 200 between the rubber roller and the printing paper roll 11 will become relatively loose, so the pressure exerted by the printing paper 200 on the contact surface 239 will also become small (the pressure may be 0), at this time, the contact plate 234 rotates clockwise (or outward) around the fixed shaft 233, so that the printing paper 200 becomes tensioned again and the torsion spring 232 reaches the equilibrium again, at this time, the buffer structure 30 or the torsion spring 232 is in the second state (the second state may be a completely uncompressed state, namely, the pressure exerted by the printing paper 200 on the contact surface 239 is 0), and obviously, the compression degree of the torsion spring 232 in the second state is smaller than that in the first state.

From the above analysis, it can be seen that by adding the buffering structure 230, the paper can gradually return from the relaxed state to the relatively tensioned state during the retraction, i.e. the sudden force applied to the printing paper 200 at the moment of being tensioned can be decomposed into a gradual force. Therefore, the problem that under the interference of the sudden force, the contact position of the printing paper 200 and the rubber roller is dislocated, so that the printing paper 200 deviates from the original printing position, and further the printing is abnormal is solved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A printer comprises a shell, a paper reel arranged in the shell and used for placing a printing paper roll, and a paper outlet arranged on the shell, wherein a paper feeding channel for printing paper to walk is formed between the paper reel and the paper outlet; the printing paper feeding device is characterized by further comprising a buffer structure arranged in the paper feeding channel, wherein the buffer structure comprises a contact surface which is used for being in contact with printing paper to bear the pressure applied by the printing paper; when the printing paper is fed in the printing channel in the forward direction, the pressure exerted by the printing paper enables the buffer structure to be in a first state; when the printing paper is reversely fed in the printing channel, the buffer structure is in a second state by the pressure exerted by the printing paper, and the compression degree of the first state is greater than that of the second state.

2. The printer of claim 1, wherein the buffer structure comprises a fixed shaft, an outer sleeve, and at least one elastic member; the fixed shaft is fixed in the shell, the outer side of the outer shaft sleeve forms the contact surface, and the inner side of the outer shaft sleeve is elastically connected to the fixed shaft through the elastic piece.

3. Printer according to claim 2 characterised in that the inner side of the outer sleeve is provided with at least one first connection point; the buffer structure further comprises an inner shaft sleeve, and the fixed shaft is sleeved in the inner shaft sleeve; a guide groove is formed in one side, facing the outer shaft sleeve, of the inner shaft sleeve, and a second connecting point corresponding to the first connecting point is arranged in the guide groove; one end of the elastic piece is arranged on the first connecting point, and the other end of the elastic piece is arranged on the second connecting point.

4. The printer according to claim 3, wherein the inner sleeve is in a U-shaped groove shape, and a through hole for sleeving the fixed shaft is formed in the bottom of the U-shaped groove.

5. The printer according to claim 3, wherein at least one pair of hooks are disposed on two outer sidewalls of the inner sleeve, and a bayonet corresponding to the hooks is disposed on an inner side of the outer sleeve, and the hooks are engaged with the bayonet.

6. The printer according to claim 3, wherein two outer side walls of the inner shaft sleeve are further provided with limiting portions, the inner side of the outer shaft sleeve is further provided with limiting grooves corresponding to the limiting portions, and the limiting portions are inserted into the limiting grooves.

7. The printer of claim 3, wherein the elastic member is a compression spring, and the number of the compression springs is two and is provided at opposite ends of the outer sleeve.

8. The printer of claim 1, wherein the dampening structure comprises an outer sleeve and a torsion spring; the outer shaft sleeve comprises a fixed shaft and a contact plate connected with the fixed shaft; the fixed shaft is fixed in the shell and is provided with an opening close to the shell; the fixed end of the torsion spring is fixed on the shell; the main body part of the torsion spring is arranged in the opening, and the torsion arm of the torsion spring is abutted against the inner surface of the contact plate; the outer surface of the contact plate forms the contact surface.

9. The printer of claim 8, wherein said fixed shaft is a hollow structure; the buffering structure further comprises a cover cap arranged at the top of the fixing shaft.

10. The printer according to any one of claims 1 to 9, wherein the buffer structure is disposed in a position in the paper feed path close to the paper roll and away from the paper discharge port.