Miniature printer and method for adapting to different paper widths

Abstract

The present application relates to the technical field of micro printing device, and particularly relates to a micro printer and a method suitable for different paper roll widths. The micro printer comprises a limiting mechanism and a control module. The limiting mechanism has a limiting width. The limiting mechanism is configured to constrain the limiting width and the position of the paper roll in the accommodating cavity along a first direction, so that the center line of the paper roll along the first direction is arranged to correspond to the center line of the printing assembly along the first direction. The control module is configured to control the printing width of the printing assembly. The micro printer realizes printing using paper rolls with different widths according to the needs of the operator, expands the application range of the micro printer, improves the flexibility of the application of the micro printer, and the operator does not need to purchase multiple micro printers to meet the printing width requirements of different paper rolls, which is conducive to reducing the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of micro printing device, and particularly relates to a micro printer and a method for adapting to different widths of paper rolls. BACKGROUND

[0002] At present, printers have been widely applied to various aspects of life, and particularly some thermal printing devices have become one of the routine equipment in business places such as stations, banks and supermarkets, because of relatively low cost, fast printing speed and good printing effect. In some business process, by setting corresponding printing devices, the business efficiency can be greatly improved, and the time of customers waiting in line can be saved.

[0003] Due to the change of printing content in different application scenarios, the width of the printing paper required by the operator is not the same. Therefore, the operator needs to configure a micro printer for printing different width paper rolls to meet different application requirements, resulting in increased cost.

[0004] To solve the above problems, it is urgent to provide a micro printer and a method for adapting to different widths of paper rolls to solve the above problems. SUMMARY

[0005] An object of the present application is to provide a micro printer, which can be applied to paper rolls of different widths, expand the application range and reduce the cost of the operator.

[0006] Another object of the present application is to provide a method for adapting to different widths of paper rolls, which can be applied to paper rolls of different widths, expand the application range and reduce the cost of the operator. To achieve this object, the present application adopts the following technical solutions:

[0007] A micro printer, comprising a housing, a paper feeding driving assembly and a printing assembly, the housing has a containing cavity, the containing cavity is configured to set a paper roll, the paper feeding driving assembly and the printing assembly are arranged in the housing, and the paper feeding driving assembly and the printing assembly jointly hold a paper sheet of the paper roll, the paper feeding driving assembly is used to drive the paper sheet to move along a paper feeding direction;

[0008] The micro printer further comprises:

[0009] A limiting mechanism, the limiting mechanism is at least partially arranged in the containing cavity, the limiting mechanism has a limiting width, the limiting mechanism is configured to constrain the limiting width and the position of the paper roll in the containing cavity along a first direction, so that the center line of the paper roll along the first direction is arranged to correspond to the center line of the printing assembly along the first direction, and the first direction is the axis direction of the paper roll; and

[0010] A control module, the control module being in signal connection with the printing assembly, the control module being configured to control a printing width of the printing assembly.

[0011] In some embodiments, the limiting mechanism comprises:

[0012] A limiting assembly, the limiting assembly having a limiting width, the limiting width being configured to correspond to a width of the paper roll; and

[0013] An adjusting assembly, the adjusting assembly being connected with the limiting assembly, the adjusting assembly being configured to adjust a size of the limiting width.

[0014] In some embodiments, the limiting assembly comprises:

[0015] Two limiting members, the two limiting members being spaced apart by a distance corresponding to the limiting width, the two limiting members being capable of moving towards or away from each other along a first direction to adjust the size of the limiting width, the first direction being an axial direction of the paper roll.

[0016] In some embodiments, the housing comprises:

[0017] Two side plates, the two side plates being respectively located on two sides of the accommodating cavity along the first direction; and

[0018] A bottom plate, the bottom plate being arranged in an arc shape between the two side plates, the bottom plate having an accommodating gap between two sides of the bottom plate along the first direction and the two side plates, the limiting members being located in the accommodating gap, the adjusting assembly being located outside the accommodating cavity.

[0019] In some embodiments, the adjusting assembly comprises:

[0020] A driving member, the driving member being arranged on the housing; and

[0021] A transmission member, the transmission member being connected with an output end of the driving member, a portion of the transmission member being arranged in the limiting members, such that when the driving member drives the transmission member to move, the two limiting members are capable of moving towards or away from each other.

[0022] In some embodiments, the transmission member comprises:

[0023] A first gear, the first gear being connected with the output end of the driving member;

[0024] A first driving rod, the first driving rod being arranged in the two limiting members along the first direction, the first driving rod being threadedly connected with one of the limiting members, the first gear being sleeved on the first driving rod;

[0025] A second gear, the second gear being engaged with the first gear; and

[0026] a second driving rod, the second gear sleeve is arranged on the second driving rod, the second driving rod is parallel and spaced apart from the first driving rod, the second driving rod is arranged in the two limiters along the first direction, the second driving rod is threadedly connected with the other limiter, and the first driving rod and the second driving rod are opposite to the thread direction of the two limiters.

[0027] In some embodiments, the driving member comprises:

[0028] a third gear coaxially arranged on the first driving rod;

[0029] a fourth gear engaged with the third gear, and the fourth gear is perpendicular to the axis of the third gear; and

[0030] a driving part, an output end of the driving part is connected with the fourth gear, the driving part drives the fourth gear to rotate, and the third gear can be driven to rotate.

[0031] In some embodiments, the limiting mechanism further comprises:

[0032] a guide assembly arranged on the shell, the guide assembly is configured to provide guidance during assembly of the adjusting assembly and limit the first direction freedom of the adjusting assembly.

[0033] A method for adapting to different widths of the paper roll, comprising the following steps:

[0034] adjusting the limiting mechanism with the center line of the printing assembly of the micro printer in the first direction as the center, changing the local position of the limiting mechanism to limit the paper roll of different widths;

[0035] the control module adjusts the printing width of the printing assembly, so that the center line of the printing width of the assembly corresponds to the center line of the width of the paper roll.

[0036] In some embodiments, the method for adjusting the printing width of the printing assembly so that the printing width corresponds to the width of the paper roll comprises:

[0037] adjusting the number of spaces before the printed characters; and

[0038] adjusting the number of characters per line.

[0039] The beneficial effects of the present application are:

[0040] The present application provides a kind of micro printer, micro printer includes shell, paper drive assembly and printing assembly, there is accommodating bin in shell, accommodating bin is configured to set up roll paper, paper drive assembly and printing assembly are arranged in shell, and paper drive assembly and printing assembly are held together the paper of roll paper, paper drive assembly is used to drive paper to move along the direction of paper feeding;Micro printer further includes limiting mechanism and control module, limiting mechanism is at least partially arranged in accommodating bin, limiting mechanism has limiting width, limiting mechanism is configured to constrain the position of limiting width and roll paper in accommodating bin along the first direction, so that the center line of roll paper along the first direction and the center line of printing assembly along the first direction are correspondingly arranged, the first direction is the axial direction of roll paper;Control module is signal connected with printing assembly, control module is configured to control the printing width of printing assembly.The micro printer adjusts the limiting width of roll paper by adjusting the limiting mechanism of roll paper, so as to accommodate roll paper of different widths, and adjusts the control module to enable it to adjust the printing width by constraining the position of roll paper along the first direction.The micro printer realizes printing using roll paper of different widths according to the needs of operator, expands the application range of the micro printer, and improves the flexibility of the micro printer application.Using the micro printer, the operator does not need to purchase multiple micro printers to meet the width requirement of printing different roll paper, which is helpful to reduce cost.

[0041] The present embodiment provides a method for adapting different roll paper widths, which comprises the following steps: adjusting the limiting mechanism with the center line of the printing assembly along the first direction as the center, changing the local position of the limiting mechanism to limit roll paper of different widths by the limiting mechanism;And the control module adjusts the printing width of the printing assembly, so that the center line of the printing width of the component corresponds to the center line of the width of the roll paper.Through the method for adapting different roll paper widths, the micro printer adjusts the limiting of roll paper by adjusting the limiting mechanism of roll paper, so as to accommodate roll paper of different widths, and adjusts the control module to enable it to adjust the printing width.The micro printer realizes printing using roll paper of different widths according to the needs of operator, expands the application range of the micro printer, and improves the flexibility of the micro printer application.Using the micro printer, the operator does not need to purchase multiple micro printers to meet the width requirement of printing different roll paper, which is helpful to reduce cost. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and these drawings.

[0043] Figure 1is a structural schematic of the micro printer provided by embodiment one of the present application Figure 1 ;

[0044] Figure 2 is a structural schematic of the micro printer provided by embodiment one of the present application Figure 2 ;

[0045] Figure 3 is a structural schematic of the micro printer provided by embodiment one of the present application Figure 3 ;

[0046] Figure 4 is a structural schematic of the limiting mechanism provided by embodiment one of the present application

[0047] Figure 5 is Figure 4 the enlarged view of A in FIG. 1

[0048] Figure 6 is a logic diagram of the method for adapting to different paper widths provided by embodiment two of the present application

[0049] Figure 7 is a connection relationship schematic of the control module provided by embodiment two of the present application

[0050] The figures are marked as follows:

[0051] 1000, micro printer

[0052] 100, shell; 110, containing bin; 120, side plate; 130, bottom plate; 140, containing gap; 150, lower shell; 160, upper shell; 170, containing space; 180, upper cover body

[0053] 200, paper driving assembly

[0054] 300, printing assembly

[0055] 400, limiting mechanism

[0056] 410, limiting assembly; 411, limiting piece

[0057] 420, adjusting assembly; 421, driving piece; 4211, driving part; 4212, third gear; 4213, fourth gear; 4214, connecting shaft; 422, transmission piece; 4221, first gear; 4222, first driving rod; 4223, second gear; 4224, second driving rod; 4225, first bearing

[0058] 430, limiting strip

[0059] 440, limiting boss

[0060] 450. Guide assembly; 451. Guide groove;

[0061] 500. Control module;

[0062] 2000, toilet paper. Detailed Implementation

[0063] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only portions of the structure relevant to the present invention, not the complete structure.

[0064] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection of the internal structures of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0066] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0067] Example 1

[0068] like Figure 1 As shown, this embodiment provides a miniature printer 1000, which can be a handheld POS machine, label printer, or other miniature printer 1000.

[0069] As Figures 1-3 The micro printer 1000 comprises a housing 100, a paper driving assembly 200 and a printing assembly 300, the housing 100 is provided with a containing cavity 110, the containing cavity 110 is configured to set a paper roll 2000, the paper driving assembly 200 and the printing assembly 300 are arranged in the housing 100, and the paper driving assembly 200 and the printing assembly 300 jointly hold the paper of the paper roll 2000, the paper driving assembly 200 is used to drive the paper to move along a paper driving direction, so as to realize the printing function of the micro printer 1000.

[0070] Please refer to Figures 2-5 The housing 100 comprises a lower housing 150 and an upper housing 160 arranged in cooperation, and the containing cavity 110 is arranged in the upper housing 160. The paper driving assembly 200 and the printing assembly 300 can be arranged in the upper housing 160, or arranged in the upper housing 160 and the lower housing 150 at the same time. The housing 100 further comprises an upper cover 180, which covers the upper housing 160 to enclose the containing cavity 110.

[0071] Further, the upper housing 160 has an outer shell. The housing 100 comprises a bottom plate 130 and two side plates 120. The two side plates 120 are respectively located on both sides of the containing cavity 110 along a first direction, and the outer shell and the side plates 120 on both sides of the micro printer 1000 along the first direction are arranged in parallel and spaced apart, and the containing space 170 between the outer shell and the side plates 120 is used to set the connecting structure between the upper housing 160 and the lower housing 150. At the same time, since the paper roll 2000 is a cylinder, the bottom plate 130 is arranged in an arc shape between the two side plates 120 to provide support at the bottom of the paper roll 2000.

[0072] Please refer to Figure 4 And Figure 5 Further, the micro printer 1000 further comprises a limiting mechanism 400 and a control module 500. The limiting mechanism 400 is at least partially arranged in the containing cavity 110, the limiting mechanism 400 has a limiting width, and the limiting mechanism 400 is configured to constrain the position of the limiting width and the paper roll 2000 in the containing cavity 110 along a first direction, so that the center line of the paper roll 2000 along the first direction corresponds to the center line of the printing assembly 300 along the first direction, and the first direction is the axis direction of the paper roll 2000. The control module 500 is signal connected with the printing assembly 300, and the control module 500 is configured to control the printing width of the printing assembly 300.

[0073] The micro printer 1000 adjusts the limiting width of the limiting mechanism 400 to the roll paper 2000, so as to accommodate roll papers 2000 of different widths, while the limiting mechanism 400 restricts the position of the roll paper 2000 along the first direction, and the control module 500 is adjusted to enable adjustment of the printing width. The micro printer 1000 realizes printing using roll papers 2000 of different widths according to the needs of the operator, expands the application range of the micro printer 1000, and improves the flexibility of the micro printer 1000. With the micro printer 1000, the operator does not need to purchase multiple micro printers 1000 to meet the printing width requirements of different roll papers 2000, which is helpful to reduce costs.

[0074] At the same time, the micro printer 1000 can ensure that the center of the roll paper 2000 along the first direction always corresponds to the center line of the printing assembly 300 during the process of adjusting and adapting to the width of different roll papers 2000, to ensure the beauty and comfort of the operator during use.

[0075] As an optional solution, the limiting mechanism 400 includes a limiting assembly 410 and an adjusting assembly 420. The limiting assembly 410 has a limiting width corresponding to the width of the roll paper 2000, and the adjusting assembly 420 is connected to the limiting assembly 410, and the adjusting assembly 420 is configured to adjust the size of the limiting width. When it is necessary to replace roll papers 2000 of different widths, it is only necessary to operate the adjusting assembly 420 to adjust the limiting width of the limiting assembly 410, and the adjustment can be achieved. The adjustment mechanism is simple in structure and convenient to operate, which can not only reduce costs, but also facilitate the operator to use.

[0076] In some embodiments, the limiting assembly 410 includes two limiting members 411 spaced apart, and the distance between the two limiting members 411 is the limiting width. The two limiting members 411 can approach or move away from each other along the first direction to adjust the size of the limiting width, and the first direction is the axial direction of the roll paper 2000. The limiting assembly 410 adjusts the limiting width by approaching or moving away from each other of the two limiting members 411, which is helpful to realize the simultaneous adjustment of the two limiting members 411, which can not only improve the adjustment efficiency, but also ensure that the center line does not deviate, so as to correspond to the printing range of the printing assembly 300. It is helpful to improve the stability of the micro printer 1000.

[0077] The two side plates 120 are provided with accommodation gaps 140 along the two sides of the bottom plate 130 in the first direction, and the limiting members 411 are located in the accommodation gaps 140, and the adjusting assembly 420 is located outside the accommodation cavity 110. Due to the limited space of the accommodation cavity 110, in order to improve the space utilization and reduce the overall size of the micro printer 1000, only the limiting members 411 are arranged in the accommodation gaps 140, and the adjusting assembly 420 is located outside the accommodation cavity 110, which is beneficial to fully utilize the space of the accommodation groove and the shell 100, and improve the space utilization.

[0078] At the same time, the above structure facilitates the limiting members 411 to constrain the size of the limiting width, and the positions of the two limiting members 411 in the first direction in the accommodation cavity 110 can control the position of the paper roll 2000.

[0079] Specifically, the limiting member 411 can be a quarter-like circular or square plate structure.

[0080] When the limiting member 411 is a quarter-like circular structure, the position of the limiting member 411 close to the center of the circle is connected with the adjusting assembly 420, and the arc side of the limiting member 411 is used to limit the paper roll 2000. At this time, when the paper roll 2000 is a hollow paper roll 2000 with a reel, the radius size of the limiting member 411 makes the outer arc edge of the limiting member 411 tangent to or slightly gap-fitted with the outer periphery of the reel, so as to avoid that when the paper roll 2000 is about to be used up, the limiting member 411 cannot limit the paper roll 2000 with less paper in the first direction. When the paper roll 2000 is a solid paper roll 2000 without a reel, the radius size of the limiting member 411 is correspondingly set according to the radius of the reel.

[0081] When the limiting member 411 is a square structure, the size of the limiting member 411 in the height direction makes it not protrude from the upper end surface of the upper shell 160. At the same time, when the paper roll 2000 is a hollow paper roll 2000 with a reel, the size of the limiting member 411 in the height direction is not less than the thickness of the paper of the paper roll 2000. When the paper roll 2000 is a solid paper roll 2000 without a reel, the size of the limiting member 411 in the height direction makes it not higher than the upper end surface of the upper shell 160. In the direction perpendicular to the height direction, the size of the limiting member 411 is not less than the radius of the paper roll 2000, so as to ensure that no matter what the diameter of the paper roll 2000 is, the limiting member 411 can limit the position of the paper roll 2000 in the first direction.

[0082] As an alternative, the adjusting assembly 420 comprises a driving member 421 and a transmission member 422. The driving member 421 is arranged on the housing 100, and the transmission member 422 is connected with the output end of the driving member 421, and a part of the transmission member 422 is arranged in the limiting member 411, so that when the driving member 421 drives the transmission member 422 to move, the two limiting members 411 can be driven to move close to or away from each other, thereby adjusting the limiting width between the two limiting members 411.

[0083] In this embodiment, the driving member 421 is arranged in the accommodating space 170, so as to make full use of the space of the housing 100.

[0084] Alternatively, as shown in Figure 5 The transmission member 422 comprises a first gear 4221, a first driving rod 4222, a second gear 4223 and a second driving rod 4224. The first gear 4221 is connected with the output end of the driving member 421, the first driving rod 4222 is arranged in the two limiting members 411 in the first direction, the first driving rod 4222 is threadedly connected with one of the limiting members 411, the first gear 4221 is sleeved on the first driving rod 4222, the second gear 4223 is engaged with the first gear 4221, the second gear 4223 is sleeved on the second driving rod 4224, the second driving rod 4224 is arranged in parallel and spaced apart from the first driving rod 4222, the second driving rod 4224 is arranged in the two limiting members 411 in the first direction, the second driving rod 4224 is threadedly connected with the other limiting member 411, and the first driving rod 4222 and the second driving rod 4224 are threadedly connected with the two limiting members 411 in opposite directions. The transmission member 422 can realize the synchronous adjustment of the positions of the two limiting members 411 under single driving, and has simple structure and low cost. More importantly, the synchronous adjustment of the two limiting members 411 can ensure the equivalence of the movement distances of the two limiting members 411, thereby ensuring that the center of the limiting width remains unchanged during the adjustment, and further ensuring that the center of the paper corresponds to the center of the printing assembly 300 during the printing process, thereby avoiding the printing deviation.

[0085] More specifically, the first driving rod 4222 is threadedly connected with one of the limiting members 411 and slidably connected with the other limiting member 411, and at the same time, the second driving rod 4224 is threadedly connected with one of the limiting members 411 and slidably connected with the other limiting member 411, thereby reducing the friction between the first driving rod 4222, the second driving rod 4224 and the limiting members 411.

[0086] Further, the connection between the first driving rod 4222, the second driving rod 4224 and the limiting members 411 can be provided with a first bearing 4225, and the first bearing 4225 is a sliding bearing, so as to further reduce the friction during the sliding process and improve the service life of the parts.

[0087] In some embodiments, the driving member 421 comprises a third gear 4212, a fourth gear 4213 and a driving part 4211. The third gear 4212 is coaxially arranged on the first driving rod 4222 with the first gear 4221, the fourth gear 4213 is engaged with the third gear 4212, and the axis of the fourth gear 4213 is perpendicular to that of the third gear 4212. The output end of the driving part 4211 is connected with the fourth gear 4213, the driving part 4211 drives the fourth gear 4213 to rotate, and the third gear 4212 can be driven to rotate. The structure of the driving member 421 changes the output direction of the driving member 421 through the cooperation of the third gear 4212 and the fourth gear 4213, which is beneficial to improve the flexibility of the structure of the driving member 421.

[0088] For example, the third gear 4212 and the fourth gear 4213 are helical gears, and the driving part 4211 can be a motor. The motor is electrically connected with the control module 500 to realize electric driving, further simplifying the operation steps of the operator and improving the automation degree of the micro printer 1000.

[0089] In addition, the third gear 4212 and the fourth gear 4213 are helical gears, and the driving part 4211 can also be manually driven. At this time, the driving part 4211 can be arranged at the lower end of the lower shell 150, so that the operator can adjust the limiting width without opening the shell 100, which is beneficial to improve the flexibility of the operation of the limiting mechanism 400. The manually driven driving part 4211 can be a rocker drive, which can be operated by the operator without the aid of external tools. The manually driven driving part 4211 can also be a screw, which can be operated by the operator through a tool such as a screw rod. This embodiment is not limited in this regard.

[0090] Further, the driving member 421 further comprises a fixing seat (not shown in the figure), which is arranged on the lower shell 150. The connecting shaft 4214 between the fourth gear 4213 and the driving part 4211 passes through the fixing seat to connect, so as to ensure the structural stability of the limiting mechanism 400. Of course, a second bearing can be arranged between the connecting shaft 4214 and the fixing seat, which is a rotating bearing to reduce the friction between the connecting shaft 4214 and the fixing seat.

[0091] Further, the limiting mechanism 400 further comprises a limiting strip 430, which is arranged in the accommodating bin 110 along the first direction. The limiting strip 430 is configured to avoid the rotation of the limiting assembly 410 to ensure the stability of the limiting mechanism 400.

[0092] 410, to ensure the stability of the limiting mechanism 400.

[0093] In addition, the limiting mechanism 400 further comprises a limiting boss 440, which is arranged on the limiting strip 430 and is used to limit the minimum distance between the two limiting members 411, i.e., the limiting boss 440 can limit the minimum width of the paper roll 2000 that can be placed in the micro printer 1000.

[0094] In actual use, the paper width of the micro printer 1000 generally has multiple specifications such as 58 mm, 76 mm, 79.5 mm and 80 mm. In this embodiment, the limiting width limited by the limiting boss 440 is the minimum paper width in the conventional sense, i.e., 58 mm.

[0095] As an optional solution, the limiting mechanism 400 further comprises a guide assembly 450, which is arranged on the shell 100, specifically on the inner wall of the upper shell 160, and is used to provide guidance for the assembly process of the adjusting assembly 420, so as to facilitate the quick assembly of the adjusting assembly 420. At the same time, the guide assembly 450 limits the first direction freedom of the adjusting assembly 420, so as to avoid the movement of the adjusting assembly 420 and improve the stability of the working process of the adjusting mechanism.

[0096] Further, the guide assembly 450 has a guide groove 451 extending in the up-down direction, and the guide groove 451 is open downward and extends in the up-down direction. Specifically, the guide assembly 450 can be two groups, and the two groups of guide assemblies 450 are arranged at the two ends of the adjusting assembly 420, respectively. When assembling the first driving rod 4222 and the second driving rod 4224 of the adjusting assembly 420, only the two ends of the first driving rod 4222 and the second driving rod 4224 need to be slid into the guide groove 451 from the opening upward, and then the two ends of the first driving rod 4222 and the second driving rod 4224 abut against the upper shell 160. At this time, the upper shell 160 can also avoid the movement of the first driving rod 4222 and the second driving rod 4224 in the first direction.

[0097] In order to fix the first driving rod 4222 and the second driving rod 4224, rotating bearings (not shown in the figure) can be arranged between the two ends of the first driving rod 4222 and the second driving rod 4224 and the upper shell 160, so that the first driving rod 4222 and the second driving rod 4224 can rotate and the friction is reduced. Specifically, the upper shell 160 has a fixing hole, the bearing seat of the rotating bearing can be assembled into the fixing hole from the other side, the rotating bearing is sleeved on the end of the first driving rod 4222 or the second driving rod 4224, and the bearing seat is fixed on the upper shell 160.

[0098] Embodiment Two

[0099] The embodiment provides a method for adapting to different widths of the paper roll 2000, which is used for the micro printer 1000.

[0100] As shown in Figure 6 and Figure 7 illustrated, the method comprises the following steps:

[0101] Adjusting the limiting mechanism 400 with the center line of the printing assembly 300 along the first direction as the center, changing the local position of the limiting mechanism 400 to limit the different widths of the paper roll 2000; and adjusting the printing width of the printing assembly 300 by the control module 500, so that the center line of the printing width of the assembly corresponds to the center line of the width of the paper roll 2000.

[0102] It is worth noting that the adjustment of the limiting mechanism 400 and the adjustment of the control module 500 can be performed simultaneously, and can be performed in any order. The present embodiment does not limit this.

[0103] By the method of adapting to the width of the paper roll 2000, the micro printer 1000 adjusts the limiting of the paper roll 2000 by the limiting mechanism 400 to accommodate paper rolls 2000 of different widths, while adjusting the control module 500 to adjust the printing width. The micro printer 1000 realizes printing with paper rolls 2000 of different widths according to the needs of the operator, expands the application range of the micro printer 1000, and improves the flexibility of the micro printer 1000. With the micro printer 1000, the operator does not need to purchase multiple micro printers 1000 to meet the width requirements of the paper roll 2000, which is helpful to reduce costs.

[0104] Further, the method of adjusting the limiting mechanism 400 with the center line of the printing assembly 300 along the first direction as the center includes adjusting the distance from the center line to the limiting plate of the limiting mechanism 400 on both sides. This method can ensure that the center of the paper roll 2000 along the first direction always corresponds to the center line of the printing assembly 300 during the process of adjusting and adapting to the width of the paper roll 2000, to ensure the beauty and comfort of the operator during use.

[0105] Alternatively, the method of adjusting the printing width of the printing assembly 300 by the control module 500 so that the printing width corresponds to the width of the paper roll 2000 includes adjusting the number of spaces before the printed characters; and adjusting the number of characters per line. This method is helpful to make the characters printed by the printing assembly 300 adapt to the width of the paper roll 2000, and avoid the situation that the printing is outside or the width of the paper roll 2000 is not reasonably applied.

[0106] It should be noted that the above has shown and described the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A miniature printer, characterized in that, The device includes a housing (100), a paper feed drive assembly (200), and a printing assembly (300). The housing (100) has a receiving compartment (110) configured to hold a roll of paper (2000). The paper feed drive assembly (200) and the printing assembly (300) are disposed in the housing (100) and together hold the paper of the roll of paper (2000). The paper feed drive assembly (200) is used to drive the paper to move along the paper feed direction. The micro printer also includes: A limiting mechanism (400) is at least partially disposed in the receiving compartment (110). The limiting mechanism (400) has a limiting width and is configured to constrain the limiting width and the position of the roll paper (2000) in the receiving compartment (110) along a first direction, such that the center line of the roll paper (2000) along the first direction corresponds to the center line of the printing assembly (300) along the first direction, wherein the first direction is the axial direction of the roll paper (2000). A control module (500) is signal-connected to the printing component (300), and the control module (500) is configured to control the printing width of the printing component (300); The limiting mechanism (400) includes: A limiting component (410) having a limiting width corresponding to the width of the roll of paper (2000); and An adjustment component (420) is connected to the limiting component (410), and the adjustment component (420) is configured to adjust the size of the limiting width; The limiting component (410) includes: Two spaced-apart limiting members (411) are provided, the distance between the two limiting members (411) is the limiting width, and the two limiting members (411) can move closer or further away from each other along the first direction to adjust the size of the limiting width. The adjustment component (420) includes: A drive element (421) is disposed on the housing (100); and The transmission component (422) is connected to the output end of the driving component (421). A portion of the transmission component (422) passes through the limiting component (411) so that when the driving component (421) drives the transmission component (422) to move, it can drive the two limiting components (411) to move closer to or further away from each other. The transmission component (422) includes: The first gear (4221) is connected to the output end of the drive unit (421); A first drive rod (4222) is inserted through the two limiting members (411) along a first direction. The first drive rod (4222) is threadedly connected to one of the limiting members (411). The first gear (4221) is sleeved on the first drive rod (4222). The second gear (4223) meshes with the first gear (4221); and The second drive rod (4224) is fitted with the second gear (4223). The second drive rod (4224) is parallel to and spaced apart from the first drive rod (4222). The second drive rod (4224) passes through the two limiting members (411) along the first direction. The second drive rod (4224) is threadedly connected to the other limiting member (411). The thread directions of the first drive rod (4222) and the second drive rod (4224) are opposite to those of the two limiting members (411). The limiting mechanism (400) also includes: A guide assembly (450) is disposed on the housing (100) and is configured to provide guidance for the assembly process of the adjustment assembly (420) while limiting the degree of freedom of the adjustment assembly (420) in a first direction.

2. The micro printer according to claim 1, characterized in that, The housing (100) includes: Two side panels (120), the two side panels (120) being located on opposite sides of the receiving compartment (110) along the first direction; and A base plate (130) is arranged in an arc shape between two side plates (120), and the base plate (130) has a receiving gap (140) between the two sides of the two side plates (120) along the first direction. The limiting member (411) is located in the receiving gap (140), and the adjusting component (420) is located outside the receiving compartment (110).

3. The micro printer according to claim 1, characterized in that, The driving element (421) includes: The third gear (4212) is coaxially mounted on the first drive rod (4222) with the first gear (4221); A fourth gear (4213) meshes with the third gear (4212), and the axis of the fourth gear (4213) is perpendicular to that of the third gear (4212); and The drive unit (4211) has its output end connected to the fourth gear (4213). The drive unit (4211) drives the fourth gear (4213) to rotate, which in turn drives the third gear (4212) to rotate.

4. A method for adapting to different roll widths of paper, characterized in that, The method for adapting to different paper roll widths using the micro printer as described in any one of claims 1-3 includes the following steps: Adjust the limiting mechanism (400) with the center line of the printing component (300) of the micro printer along the first direction as the center, and change the local position of the limiting mechanism (400) so that the limiting mechanism (400) limits the roll paper (2000) of different widths; The control module (500) adjusts the printing width of the printing component (300) so that the center line of the printing width of the printing component (300) corresponds to the center line of the width of the roll paper (2000).

5. The method for adapting to different roll widths according to claim 4, characterized in that, The method by which the control module (500) adjusts the printing width of the printing assembly (300) to correspond to the width of the roll paper (2000) includes: Adjust the number of spaces before printed characters; and Adjust the number of characters per line.

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