Printer and printer control method

Abstract

The invention discloses a printer, which comprises a lower working part and an upper working part, wherein the lower working part and the first side of the upper working part are movably hinged through a first hinge shaft, a first roller body and a second roller body are arranged on the lower working part, a print head is also arranged on the upper working part, a first flip bracket is movably arranged on the lower working part, the first flip bracket is located between the lower working part and the upper working part, a third roller body is arranged on the first flip bracket; the first roller body is opposite to the print head, the second roller body is opposite to the third roller body, and a paper passing channel is formed therebetween. The invention can conveniently maintain and operate the printer, and is more convenient to use.

Description

Technical Field

[0001] The invention belongs to the field of printers, and in particular relates to a printer and a printer control method. Background Art

[0002] Printers are widely used in offices, tourist attractions, hospitals, airports, supermarkets and other places to print information of travelers or customers.

[0003] The printing tape is an important carrier for printing. During the printing process, the printing tape often jams due to reasons such as printing tape deviation, printing tape wrinkles, or foreign objects entering the printing tape, requiring maintenance inside the printer. Due to its structural design, existing printers are not convenient to maintain after a paper jam.

[0004] When inserting the printing tape into the printer, it is necessary to align the printing tape with great effort to prevent the printing tape from being offset and affecting the printing effect. When inserting the printing tape, the operation is also inconvenient.

[0005] This situation is more prominent for small printers due to their limited space. Summary of the invention

[0006] The object of the present invention is to provide a printer and a printer control method, which can conveniently maintain and operate the printer and is more convenient to use.

[0007] The present invention provides a printer, comprising a lower working part and an upper working part, wherein the first sides of the lower working part and the upper working part are movably hinged via a first hinge shaft, a first roller body and a second roller body are provided on the lower working part, a print head is also provided on the upper working part, a first flip bracket is movably provided on the lower working part, the first flip bracket is located between the lower working part and the upper working part, and a third roller body is provided on the first flip bracket; the first roller body is opposite to the print head, the second roller body is opposite to the third roller body, and a paper passing channel is formed therebetween.

[0008] In one embodiment, a positioning boss is provided on the lower working part, the first end of the first flip bracket is hinged to the lower working part through a first rotating shaft, and the second end of the first flip bracket is positioned by the positioning boss.

[0009] In one embodiment, there are two positioning bosses, which are respectively located on both sides of the paper feeding channel; the first hinge shaft is close to the paper feed side of the lower working part, the positioning boss extends from the paper feed side to the paper output side, and the second end of the first flip bracket is limited by the two positioning bosses.

[0010] In one embodiment, the surface of the lower working part is partially concave to form a concave surface, and the positioning bosses are formed on both sides of the concave surface. The concave surface gradually moves upward close to the paper outlet side to form a transition slope, which is tangent to the roller surface of the first roller body.

[0011] In one embodiment, the first flip bracket includes a frame body and two rotating shaft frames, the two rotating shaft frames are installed on the frame body, hinge holes are provided on the rotating shaft frames, both ends of the third roller body are installed in the hinge holes, and a first elastic member is provided between the rotating shaft frame and the frame body.

[0012] In one embodiment, four support columns are provided on the frame body, each of the rotating shaft frames has two side ears, and the side ears of the rotating shaft frame are respectively installed on the ends of their respective support columns by screws, and the side ears have a movable gap on the screws. The first elastic member is a coil spring, which is sleeved on the support columns and pressed between the frame body and the rotating shaft frame respectively.

[0013] In one of the embodiments, a second flip bracket is movably provided on the upper working part, and the first roller and the print head are arranged on the second flip bracket.

[0014] In one of the embodiments, a driving motor, a first driving shaft, and a second driving shaft are provided in the lower working part, the first roller body is installed on the first driving shaft, the second roller body is installed on the second driving shaft, a first driving gear is also installed on the first driving shaft, and a second driving gear is also installed on the second driving shaft, and the first driving gear and the second driving gear are driven by the driving motor.

[0015] In one embodiment, a first belt shaft and a second belt shaft are provided on the second flip bracket, and a third driving gear is provided on the first belt shaft; when the lower working part and the upper working part are interlocked, the third driving gear is directly or indirectly connected to the first driving gear.

[0016] In one embodiment, the first belt shaft includes a first sub-shaft and a second sub-shaft, the second belt shaft includes a third sub-shaft and a fourth sub-shaft, the first sub-shaft is coaxially opposite to the second sub-shaft, and the third sub-shaft is coaxially opposite to the fourth sub-shaft; the third driving gear is installed on the first sub-shaft, and there is an axial movable gap between the second sub-shaft, the fourth sub-shaft and the second flip bracket, and a second elastic member is provided between the third sub-shaft and the second flip bracket, and a third elastic member is provided between the fourth sub-shaft and the second flip bracket.

[0017] In one of the embodiments, a position sensing element is provided on the lower working portion, and the position sensing element faces the first flip bracket.

[0018] In one of the embodiments, a placement space corresponding to the first flip bracket is provided on the paper feeding side of the second flip bracket, a second guide slope is provided at the lower part of the second flip bracket, and a first guide slope is provided on the back of the first flip bracket, and a tape passing channel is formed between the first guide slope and the second guide slope.

[0019] In one embodiment, the second flip bracket is movably mounted on the upper working part via a second rotating shaft.

[0020] In one of the embodiments, a slide groove is provided on the paper feeding side of the lower working part, and a first sliding frame and a second sliding frame are movably provided in the slide groove, the first sliding frame is opposite to the second sliding frame, a first rack is provided on the first sliding frame, and a second rack is provided on the second sliding frame. A transition gear is also provided on the paper feeding side of the lower working part, and the first rack and the second rack are respectively meshed with two sides of the transition gear, and a fourth elastic member is provided between the lower working part and the first sliding frame and / or the second sliding frame.

[0021] The present invention also provides a printer control method, the method comprising the following steps:

[0022] The first flip bracket is flipped over to expose the paper passage between the first flip bracket and the lower working part, the printing tape is placed on the paper passage, and the first flip bracket is pressed down; the printing tape passes through the paper passage between the first flip bracket and the lower working part, and moves forward under the action of the second roller body and the third roller body; the printing tape passes through the area between the first roller body and the print head, and is printed on the printing tape by the print head; the printing tape after printing is output from the printer under the action of the first roller body and / or the second roller body.

[0023] The present invention also provides a printer control method, the method comprising the following steps:

[0024] The first flip bracket is flipped over to expose the paper passage between the first flip bracket and the lower working part; the printing tape and sundries on the paper passage are taken out; and the maintenance of the printer is completed.

[0025] Before the first flip bracket is flipped, there is another step: flipping the upper working part relative to the lower working part, so that the printing shape is separated from the first flip bracket and the first flip bracket is exposed.

[0026] The technical solution provided by the present invention has the following advantages and effects:

[0027] During the printing process of the printer, if the printing tape is jammed, the first flip bracket can be opened to expose the paper feed channel, so as to facilitate cleaning of the paper feed channel and remove printing paper or debris; when inserting the printing tape, the first flip bracket can also be flipped over to expose the paper feed channel for easy insertion and alignment of the printing tape, which is very convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein show specific examples of the technical solutions described in the present invention, and together with the specific implementation methods, constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0029] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0030] Figure 1 is a rear perspective view of the printer of the present invention;

[0031] Figure 2 is a front perspective view of the printer of the present invention;

[0032] Figure 3 is a side view of the printer of the present invention in a first open state;

[0033] Figure 4 is a side view of the printer of the present invention in a second open state;

[0034] Figure 5 yes Figure 4 A partial enlarged view of

[0035] Figure 6 is a side view of the printer of the present invention in a third open state;

[0036] Figure 7 is a side view of the printer of the present invention in a fourth open state;

[0037] Figure 8 is a side view of the printer of the present invention in a fifth open state;

[0038] Fig. 9 is a first cross-sectional view of the printer of the present invention;

[0039] Fig.10 is a second cross-sectional view of the printer of the present invention;

[0040] Description of reference numerals:

[0041] 100, upper working part, 111, upper cover, 112, second flip bracket, 1121, second guiding slope, 1122, placement space, 113, second rotating shaft,

[0042] 121. Print head,

[0043] 131, a first belt shaft, 1311, a first sub-shaft, 1312, a second sub-shaft, 132, a second belt shaft, 1321, a third sub-shaft, 1322, a fourth sub-shaft, 1331, a second elastic member, 1332, a third elastic member, 1333, a third driving gear,

[0044] 200, lower working part, 210, lower body, 211, first hinge axis, 212, positioning boss, 213, lower concave surface, 214, transition slope,

[0045] 220, first flip bracket, 2211, support column, 2212, main bracket, 2213, pressing sheet, 222, rotating shaft frame, 2221, side ear, 223, screw, 224, hinge hole, 225, first elastic member, 226, third roller body, 227, first guiding inclined surface, 228, first rotating shaft,

[0046] 231, a first roller body, 232, a second roller body,

[0047] 240, paper passage,

[0048] 251, driving motor, 252, first driving shaft, 253, second driving shaft, 254, first driving gear, 255, second driving gear, 256, first transmission gear, 257, second transmission gear, 258, toggle wheel,

[0049] 261, first transmitting element, 262, receiving element, 263, second transmitting element, 264, opening,

[0050] 270, tail frame, 271, first sliding frame, 2711, first rack, 272, second sliding frame, 2721, second rack, 273, transition gear, 274, fourth elastic member, 275, slide groove, 276, plug interface, 277, switch,

[0051] 301, paper outlet, 302, buckle, 303, press key, 304, side baffle. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0053] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. In the context of the actual scenario of the technical solution of the present invention, all technical and scientific terms used herein may also have the meaning corresponding to the purpose of implementing the technical solution of the present invention.

[0054] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0055] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0057] Unless otherwise specified or defined, the “said” and “the” used in this document refer to the technical features or technical contents mentioned or described before the corresponding position, and the technical features or technical contents may be the same as or similar to the technical features or technical contents mentioned therein.

[0058] Undoubtedly, technical contents or technical features that are contrary to the purpose of the present invention or are obviously contradictory should be excluded.

[0059] like Figures 1 to 10As shown, the printer includes a lower working part 200 and an upper working part 100. The paper feeding side of the upper working part 100 is hinged to the lower working part 200 through a first hinge shaft 211. A buckle 302 is provided on the lower working part 200. The paper discharge side of the upper working part 100 is connected to the lower working part 200 through the buckle 302. A pressing key 303 is also provided on the lower working part 200. The buckle 302 can be controlled by the pressing key 303 to make the upper working part 100 and the lower working part 200 buckle or release. A first roller 231 and a second roller 232 are provided on the lower working part 200, and a print head 121 is also provided on the upper working part 100. The lower working part 200 includes a box-shaped lower body 210 and a first flip bracket 220. The first flip bracket 220 is located between the lower working part 200 and the upper working part 100, and a third roller 226 is provided on the first flip bracket 220; the first roller 231 is opposite to the print head 121, the second roller 232 is opposite to the third roller 226, and a paper passage 240 is formed therebetween, and a paper outlet 301 opposite to the paper passage 240 is provided at the front end of the lower working part.

[0060] When the printer is used, the first flip bracket 220 is flipped to expose the paper passage 240 between the first flip bracket 220 and the lower working part 200, the printing tape is placed on the paper passage 240, and the first flip bracket 220 is pressed down; the printing tape passes through the paper passage 240 between the first flip bracket 220 and the lower working part 200, and moves forward under the action of the second roller 232 and the third roller 226; the printing tape passes through the area between the first roller 231 and the print head 121, and is printed by the print head 121; the printing tape after printing is output from the printer under the action of the first roller 231 and / or the second roller 232.

[0061] If the printing paper is jammed or debris enters the printer, the first flip bracket 220 can be flipped to expose the paper passage 240 between the first flip bracket 220 and the lower working part 200; the printing tape and debris on the paper passage 240 can be removed to complete the maintenance of the printer.

[0062] In this embodiment, if a printing tape jam occurs, the first flip bracket 220 can be opened to expose the paper passage 240, so as to facilitate cleaning of the paper passage 240 and remove printing paper or debris. When inserting the printing tape, the first flip bracket 220 can also be flipped over to expose the paper passage 240, so as to facilitate the placement and alignment of the printing tape, which is very convenient.

[0063] Please focus on Figures 4 to 10As shown, the first flip bracket 220 includes a frame body and two rotating shaft frames 222, four support columns 2211 are arranged on the frame body, each of the rotating shaft frames 222 has two side ears 2221, the side ears 2221 of the rotating shaft frames 222 are respectively installed on the ends of their respective support columns 2211 by screws 223, and the side ears 2221 have a movable gap on the screws 223, and the first elastic member 225 is a spiral spring, which is sleeved on the support columns 2211 and pressed between the frame body and the rotating shaft frames 222 respectively; the rotating shaft frames 222 are provided with hinge holes 224, and the two ends of the third roller body 226 are installed in the hinge holes 224. The frame body includes a main bracket 2212 and a pressing sheet 2213, and the pressing sheet 2213 is fixed on the main bracket 2212. The frame body adopts a split structure, which can facilitate the demoulding of the product during the processing process and the installation of the third roller body 226. The two ends of the third roller body 226 are respectively installed in the hinge holes 224 of the rotating shaft frame 222. The two ends of the rotating shaft frame 222 are movably installed on the support column 2211 and pressed by the first elastic member 225. During operation, the third roller body 226 cooperates with the second roller body 232 to drive the printing belt forward or backward. Due to the action of the first elastic member 225, the third roller body 226 buffers and balances the force through the four force points of the rotating shaft frame 222. The third roller body 226 can produce a small jump according to the situation of the printing belt to adapt to the different thickness of the printing belt, or to adapt to the requirements of different working conditions of the printer.

[0064] The upper working part 100 includes an upper cover 111 and a second flip bracket 112, wherein the second flip bracket is movably mounted on the upper working part 100 via a second rotating shaft 113, and the first roller 231 and the print head 121 are arranged on the second flip bracket 112. A first belt shaft 131 and a second belt shaft 132 are arranged on the second flip bracket 112, wherein the first belt shaft 131 includes a first sub-shaft 1311 and a second sub-shaft 1312, and the second belt shaft 132 includes a third sub-shaft 1321 and a fourth sub-shaft 1322, wherein the first sub-shaft 1311 is coaxially opposite to the second sub-shaft 1312, and the third sub-shaft 1321 is coaxially opposite to the fourth sub-shaft 1322; a third driving gear 1333 is mounted on the first sub-shaft 1311, and the second sub-shaft 1312 is coaxially opposite to the third sub-shaft 1321; There is an axial movable gap between the second sub-shaft 1312, the fourth sub-shaft 1322 and the second flip bracket 112, and a second elastic member 1331 is provided between the third sub-shaft 1321 and the second flip bracket 112, and a third elastic member 1332 is provided between the fourth sub-shaft 1322 and the second flip bracket 112, and a toggle wheel 258 is connected to the third sub-shaft 1321, through which the third sub-shaft 1321 can be driven to rotate and the carbon ribbon / color ribbon can be clamped.

[0065] The upper working part 100 is provided with a second flip bracket 112, which can be flipped relative to the upper working part 100, so that the print head 121 and the first roller body 231 can be easily maintained; furthermore, the second flip body is provided with a first tape shaft 131 and a second tape shaft 132, and when a carbon ribbon / color ribbon is needed, the carbon ribbon / color ribbon can be installed on the first tape shaft 131 and the second tape shaft 132. After the second flip bracket 112 is provided, It is more convenient to install, remove and debug the carbon ribbon / color ribbon; the first tape shaft 131 and the second tape shaft 132 each have two sub-axes. When installing or removing the carbon ribbon / color ribbon, the third sub-axle 1321 / fourth sub-axle 1322 can be pulled apart, and the elastic force of the second elastic member 1331 / third elastic member 1332 can be overcome to make the third sub-axle 1321 / fourth sub-axle 1322 retreat, and make the carbon ribbon / color ribbon detach from the first tape shaft 131 and the second tape shaft 132. The carbon ribbon / color ribbon can be wound in a single roll or in a double roll.

[0066] A placement space 1122 corresponding to the first flip bracket 220 is provided on the paper feeding side of the second flip bracket 112, a second guiding slope 1121 is provided at the lower part of the second flip bracket 112, a first guiding slope 227 is provided at the back of the first flip bracket 220, and a tape passing passage is formed between the first guiding slope 227 and the second guiding slope 1121. When the carbon ribbon / color ribbon passes through the tape passing passage, the first guiding slope 227 at the back of the first flip bracket 220 and the second guiding slope 1121 of the second flip bracket 112 can play an effective guiding role to prevent the carbon ribbon / color ribbon from wrinkling.

[0067] The upper surface of the lower working part 200 forms a printing working surface, which is partially concave to form a lower concave surface 213, and two positioning bosses 212 are formed on both sides of the lower concave surface 213, and the two positioning bosses 212 are respectively located on both sides of the paper feeding channel 240; the first hinge shaft 211 is close to the paper feeding side of the lower working part 200, and the first end of the first flip bracket 220 is hinged on the lower working part 200 through the first rotating shaft 228, and the two positioning bosses 212 extend from the paper feeding side to the paper discharging side, and the second end of the first flip bracket 220 is limited by the two positioning bosses 212; the lower concave surface 213 gradually moves upward close to the paper discharging side to form a transition inclined surface 214, and the transition inclined surface 214 is tangent to the roller surface of the first roller body 231.

[0068] The first end of the first flip bracket 220 is hinged to the lower working part 200, and the second end is limited by two positioning convex strips on the lower working part 200 to prevent the first flip bracket 220 from swinging. The lower working part 200 is partially concave to form a concave surface 213. When the printing tape passes through the paper feeding channel 240, it will also be limited in the concave surface 213 and fit with the roller surface of the first roller body 231 along the transition inclined surface 214 near the first roller body 231, so that the printing tape can achieve smooth movement and reduce the occurrence of paper jams.

[0069] The lower working part 200 is provided with a driving motor 251, a first driving shaft 252, and a second driving shaft 253. The first roller body 231 is mounted on the first driving shaft 252, and the second roller body 232 is mounted on the second driving shaft 253. A first driving gear 254 is also mounted on the first driving shaft 252, and a second driving gear 255 is also mounted on the second driving shaft 253. The output shaft of the driving motor 251 cooperates with the first driving gear 254 and the second driving gear 255 through four first transmission gears 256, and is driven to rotate by the driving motor 251. A third driving gear 1333 is provided on the first belt shaft 131; when the lower working part 200 and the upper working part 100 are interlocked, two second transmission gears 257 are provided between the first driving gear 254 and the third driving gear 1333, and the first driving gear 254 drives the third driving gear 1333 to rotate through the two second transmission gears 257, thereby driving the carbon ribbon / color ribbon to move synchronously.

[0070] The first drive shaft 252 and the second drive shaft 253 are driven to rotate by the driving motor 251, and then the first drive gear 254 and the second drive gear 255 are driven to rotate, and then the printing belt is driven to move by the first roller body 231 and the second roller body 232. The first drive gear 254 and the second drive gear 255 preferably adopt the same specifications, which can effectively ensure that the printing belt moves smoothly during the movement, realize front and back synchronization, and avoid paper jams; the third drive gear 1333 is connected to the first drive gear 254 through two wheels, and the third drive gear 1333 is driven to rotate by the first drive gear 254, so that the moving speed of the carbon ribbon / color ribbon can be synchronized with the speed of the printing belt, thereby reducing paper jams and improving the printing effect.

[0071] In order to further improve the printing effect and the positioning accuracy, a first emitting element 261 is provided on the lower working part 200, and a receiving element 262 is provided on the first flip bracket 220, which is used to receive the sensing signal emitted by the first emitting element 261 and sense and locate the forward position of the paper. A second emitting element 263 is also provided on the lower working part 200. In order to avoid blocking the signal of the second emitting element 263, an opening 264 is provided on the first flip bracket 220. The sensing signal emitted by the second emitting element 263 passes through the opening 264 and then shines on the carbon ribbon / color ribbon on the second flip bracket 112.

[0072] Please focus on Figure 2 , Fig. 9 As shown, the reel of the printing tape needs to be installed on the paper feeding side of the lower working part 200. For the convenience of installation, a tail rack 270 is installed on the paper feeding side of the lower working part 200, and a slide groove 275 is provided on the tail rack 270. A first sliding frame 271 and a second sliding frame 272 are movably provided in the slide groove 275. The first sliding frame 271 is opposite to the second sliding frame 272. The first sliding frame 271 and the second sliding frame 272 are respectively connected to two fourth elastic members 274. A first rack 2711 is provided on the first sliding frame 271, and a second rack 2721 is provided on the second sliding frame 272. A transition gear 273 is also provided on the paper feeding side of the lower working part 200. The first rack 2711 and the second rack 2721 are respectively meshed with the two sides of the transition gear 273. A fourth elastic member 274 is provided between the lower working part 200 and the first sliding frame 271 and / or the second sliding frame 272. The two ends of the reel of the printing tape are respectively clamped on the first sliding frame 271 and the second sliding frame 272. Under the pulling force of the fourth elastic member 274, the first sliding frame 271 and the second sliding frame 272 flexibly move toward the middle and clamp the reel of the printing tape. An insertion port 276 and a switch 277 are provided on the side of the lower working part 200 and the lower part of the tail frame 270. The first sliding frame 271 and the second sliding frame 272 can move relative to the slide slot 275. This structure can be suitable for printing tapes of different specifications, and the installation and removal of the printing tape are also very convenient. The first sliding frame 271 and the second sliding frame 272 can ensure symmetrical movement of the first sliding frame 271 and the second sliding frame 272 through the cooperation of the first rack 2711, the second rack 2721 and the pass wheel, thereby ensuring the centering of the printing tape.

[0073] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the scope of protection of the present invention.

[0074] The above embodiments are not exhaustive enumerations of the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A printer, characterized in that The machine comprises a lower working part and an upper working part, wherein the first side of the lower working part and the upper working part are movably hinged through a first hinge shaft, a first roller body and a second roller body are arranged on the lower working part, a print head is arranged on the upper working part, a first flip bracket is movably arranged on the lower working part, the first flip bracket is located between the lower working part and the upper working part, and a third roller body is arranged on the first flip bracket; the first roller body is opposite to the print head, the second roller body is opposite to the third roller body, and a paper passing channel is formed therebetween; A second flip bracket is movably provided on the upper working part, and the second flip bracket can be flipped relative to the upper working part, and the print head is arranged on the second flip bracket; a placement space corresponding to the first flip bracket is provided on the paper feed side of the second flip bracket, a second guide slope is provided at the lower part of the second flip bracket, and a first guide slope is provided on the back of the first flip bracket, and a ribbon passing channel for the ribbon to pass through is formed between the first guide slope and the second guide slope.

2. The printer according to claim 1, characterized in that: A positioning boss is provided on the lower working part, the first end of the first flip bracket is hinged to the lower working part through a first rotating shaft, and the second end of the first flip bracket is positioned by the positioning boss.

3. The printer according to claim 2, characterized in that: There are two positioning bosses, which are respectively located on both sides of the paper feeding channel; the first hinge shaft is close to the paper feeding side of the lower working part, the positioning bosses extend from the paper feeding side to the paper discharging side, and the second end of the first flip bracket is limited by the two positioning bosses.

4. The printer according to claim 3, characterized in that: The surface of the lower working part is partially concave to form a concave surface, and the positioning bosses are formed on both sides of the concave surface. The concave surface gradually moves upward close to the paper discharge side to form a transition slope, which is tangent to the roller surface of the first roller body.

5. The printer according to any one of claims 1 to 4, characterized in that: The first flip bracket includes a frame body and two rotating shaft frames, the two rotating shaft frames are installed on the frame body, hinge holes are provided on the rotating shaft frames, both ends of the third roller body are installed in the hinge holes, and a first elastic member is provided between the rotating shaft frames and the frame body.

6. The printer according to claim 5, characterized in that: Four support columns are provided on the frame body, and each of the rotating shaft frames has two side ears. The side ears of the rotating shaft frame are respectively installed on the ends of their respective support columns by screws, and the side ears have a movable gap on the screws. The first elastic member is a coil spring, which is sleeved on the support columns and pressed between the frame body and the rotating shaft frame respectively.

7. The printer according to claim 1, characterized in that: The lower working part is provided with a driving motor, a first driving shaft, and a second driving shaft. The first roller is mounted on the first driving shaft, the second roller is mounted on the second driving shaft, a first driving gear is also mounted on the first driving shaft, and a second driving gear is also mounted on the second driving shaft. The first driving gear and the second driving gear are driven by the driving motor. The second flip bracket is movably mounted on the upper working part via a second rotating shaft.

8. The printer according to claim 7, characterized in that: The second flip bracket is provided with a first belt shaft and a second belt shaft, and the first belt shaft is provided with a third driving gear; when the lower working part and the upper working part are interlocked, the third driving gear is directly or indirectly connected with the first driving gear.

9. The printer according to claim 8, characterized in that: The first belt shaft includes a first sub-shaft and a second sub-shaft, the second belt shaft includes a third sub-shaft and a fourth sub-shaft, the first sub-shaft is coaxially opposite to the second sub-shaft, and the third sub-shaft is coaxially opposite to the fourth sub-shaft; the third driving gear is installed on the first sub-shaft, and there is an axial movable gap between the second sub-shaft, the fourth sub-shaft and the second flip bracket, and a second elastic member is provided between the third sub-shaft and the second flip bracket, and a third elastic member is provided between the fourth sub-shaft and the second flip bracket.

10. The printer according to claim 7, characterized in that: A position sensing element is provided on the lower working part, and the position sensing element faces the first flip bracket.

11. The printer according to any one of claims 1 to 4, characterized in that: A slide groove is provided on the paper feeding side of the lower working part, and a first sliding frame and a second sliding frame are movable in the slide groove, the first sliding frame is opposite to the second sliding frame, the first sliding frame is provided with a first rack, and the second sliding frame is provided with a second rack. A transition gear is also provided on the paper feeding side of the lower working part, the first rack and the second rack are respectively meshed with two sides of the transition gear, and a fourth elastic member is provided between the lower working part and the first sliding frame and / or the second sliding frame.

12. The printer control method of any one of claims 1 to 11, characterized in that: The method comprises the following steps: The first flip bracket is flipped over to expose the paper passage between the first flip bracket and the lower working part, the printing tape is placed on the paper passage, and the first flip bracket is pressed down; The printing belt passes through the paper passage between the first flip bracket and the lower working part, and moves forward under the action of the second roller body and the third roller body; The printing tape passes through the area between the first roller body and the printing head, and the printing tape is printed by the printing head; The printed tape after printing is output from the printer under the action of the first roller and / or the second roller.

13. The printer control method of a printer according to any one of claims 1 to 11, characterized in that: The method comprises the following steps: The first flip bracket is flipped over to expose a paper feeding passage between the first flip bracket and the lower working part; Remove the printing tape and other debris from the paper path; Complete maintenance on the printer.

14. The printer control method according to claim 12 or 13, characterized in that: Before flipping the first flip bracket, there is one more step: The upper working part is turned over relative to the lower working part, the print head is separated from the first turning bracket, and the first turning bracket is exposed.

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