A thermal desktop barcode printer capable of adapting to various paper widths

Abstract

The application discloses a heat-sensitive desktop barcode printer capable of adapting to various paper widths, which comprises a printing seat and a pressing cover, the printing seat is provided with a paper roll fixing part and a paper feeding channel, the pressing cover is provided with a Bluetooth module for control connection with a computer or a mobile terminal, two sides of the top of the paper feeding channel are slidably provided with center positioning blocks, two sides of the outer wall of the paper roll fixing part are slidably provided with center positioning clamps, synchronous driving parts are arranged between the center positioning blocks and the center positioning clamps, the outer end of the paper feeding channel is provided with a driving rubber roller, and the bottom of the pressing cover and located outside the driving rubber roller is rotatably provided with a scratch-proof paper tearing knife, when in use, the interval between the two sets of center positioning blocks and the two sets of center positioning clamps is adjusted through the synchronous driving parts, so that the heat-sensitive paper of different widths can be used, and when the driving rubber roller rotates, the scratch-proof paper tearing knife can be lifted, so that the serrated paper tearing knife edge is prevented from scratching the printed matter during printing, and paper jamming is also avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermal printers, in particular to a thermal desktop barcode printer capable of adapting to multiple paper widths. BACKGROUND

[0002] A thermal printer is a printing device that develops color by heating a special coating on thermal paper, without using ink or carbon tape. Its core component is a print head, which contains a large number of semiconductor heating elements that generate heat when powered on, thereby reacting with the special coating on the thermal paper to form pre-set text or patterns on the thermal paper. In use, the thermal printer is connected to a computer or other mobile terminal through wired or wireless means, and the printer prints the pre-set pattern through the corresponding printer control program. The thermal paper is installed in the printer in a roll, with one end of the roll driven by a rubber wheel to move outward. The thermal sheet functions to continuously print during the movement, and a paper tearing cutter is provided outside the rubber wheel. After printing is completed, the printed matter is removed by hand tearing.

[0003] However, in actual use, there are the following problems:

[0004] 1. The existing thermal printer is usually adapted, with the paper width being adapted to the paper roller and the centering limiting piece inside the printer, which makes it impossible to use thermal paper that does not conform to the printer, and there is a problem of poor compatibility of consumables.

[0005] 2. The paper tearing cutter is usually directly installed on the cover. When the cover is closed, the cutter presses the paper on the paper path, which makes the rubber wheel drive the thermal paper to move with large resistance, easily causing paper jam, and the outer end of the scraper is usually serrated, which easily scratches the printed content, affecting the use effect. Therefore, a thermal desktop barcode printer capable of adapting to multiple paper widths is provided. SUMMARY

[0006] The present application aims to provide a thermal desktop barcode printer capable of adapting to multiple paper widths to solve the problems raised in the background art.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a thermal desktop barcode printer capable of adapting to multiple paper widths, comprising a print seat and a pressure cover arranged on the top of the print seat, one end of the print seat is provided with a roll paper fixing piece, the other end of the print seat is provided with a paper path, the top of the paper path is provided with a centering positioning block on both sides, the outer wall of the roll paper fixing piece is provided with a centering positioning clamp on both sides, and a synchronous driving piece is arranged between the centering positioning block and the centering positioning clamp to adapt to different widths of the roll paper, and the roll paper is arranged in the center of the paper path.

[0008] The outer end of the paper passing channel is provided with a driving rubber roller, the bottom of the pressing cover and outside the driving rubber roller is rotatably provided with a scratch-proof paper tearing knife, the outer end of the scratch-proof paper tearing knife is provided with a serrated paper tearing knife edge, and the top of the serrated paper tearing knife edge is provided with a pressing spring, so that the serrated paper tearing knife edge is tightly attached to the paper roll in a natural state; the inner end of the scratch-proof paper tearing knife is provided with a turning arm, the turning arm is in transmission connection with the driving rubber roller, so that when the driving rubber roller drives the paper roll to move, the turning arm pulls the scratch-proof paper tearing knife to twist, thereby avoiding the serrated paper tearing knife edge from pressing the paper roll.

[0009] Preferably, a paper roll station is formed in the printing seat, a anti-sticking convex strip is integrally formed on the top of the paper passing channel, one end of the paper passing channel is downwardly bent and obliquely extended into the paper roll station, the other end of the paper passing channel is upwardly obliquely extended and tangent to the outer wall of the driving rubber roller, a paper pressing balance block opposite to the paper passing channel is mounted on the inner bottom of the pressing cover, and a thermal sensitive sheet is mounted on the front end of the paper pressing balance block.

[0010] Preferably, the paper roll fixing member comprises a reel clamping seat integrally formed on the inside of the paper roll station and on both sides thereof, a paper roll shaft is movably inserted into the reel clamping seat, the centrally positioned clamp is slidingly arranged on the outer wall of both ends of the paper roll shaft, a visible window opposite to the paper roll shaft is formed on the pressing cover, and a limiting clamping block opposite to the reel clamping seat and a limiting blocking strip for limiting the opening on the top of the centrally positioned clamp are fixedly arranged below the visible window.

[0011] Preferably, a limiting sliding groove is formed on the outer wall of the paper roll shaft, an insertion opening is formed on the bottom of both ends of the limiting sliding groove, a sliding block is integrally formed on the inner side of the centrally positioned clamp, a holding block is integrally formed on the inner top of the centrally positioned clamp, the sliding block enters the limiting sliding groove through the insertion opening, and the holding block tightly abuts against the outer wall of the paper roll shaft, and the top of the centrally positioned clamp is limited between two groups of limiting blocking strips, so that the centrally positioned clamp can tightly abut against the outer wall of the paper roll shaft and move along the limiting sliding groove.

[0012] Preferably, a sliding rail is fixedly arranged on the inner bottom of the paper roll station, a supporting portion is integrally formed on the bottom of the centrally positioned clamp, the supporting portion is slidingly connected outside the sliding rail, an active groove is formed on the top of the paper passing channel, the centrally positioned block is slidingly connected in the active groove, and the synchronous driving member is mounted between the supporting portion and the centrally positioned block.

[0013] Preferably, the synchronous driving member comprises a connecting arm fixedly arranged between the support part and the centrally-located block, the inside of the printing seat is rotationally provided with a bidirectional screw rod, two groups of the connecting arms are respectively threadedly connected to the outer surfaces of the two ends of the bidirectional screw rod, the middle part of the bidirectional screw rod is fixedly installed with a second transmission gear, the printing seat is fixedly provided with a driving motor, and the output end of the driving motor is fixedly provided with a second driving gear engaged with the second transmission gear.

[0014] Preferably, the two sides of the printing seat are provided with transmission grooves, the two ends of the driving rubber roller are installed with first transmission gears, the first transmission gears are rotationally arranged in the transmission grooves, and the printing seat is fixedly installed with a servo motor, the output end of the servo motor is fixedly installed with a first driving gear engaged with the first transmission gear.

[0015] Preferably, the outer side of the driving rubber roller is provided with a dustproof cover fixedly installed with the printing seat, the top of the dustproof cover is integrally formed with the anti-sticking convex strip, the sawtooth-shaped paper tearing knife edge of the anti-scratch paper tearing knife is opposite to the anti-sticking convex strip, the turnover arm is located in the transmission groove, and the inner side of the first transmission gear is fixedly installed with a friction driving wheel in a coaxial manner.

[0016] Preferably, the top end of the anti-scratch paper tearing knife is fixedly installed with a hinged part, the hinged part is rotationally arranged in a gland, the two sides of the anti-scratch paper tearing knife are fixedly connected with connecting rods, the turnover arm is movably inserted in the connecting rods, the bottom end of the turnover arm is fixedly provided with a friction wheel, and the friction wheel is attached to the outer wall of the friction driving wheel.

[0017] Preferably, the friction driving wheel is driven to move along with the driving rubber roller, so that the friction wheel is pressed and pushed to the lower side of the friction driving wheel, thereby enabling the outer end of the anti-scratch paper tearing knife to be upwardly turned over; when the friction driving wheel is stopped, the friction wheel is upwardly slid along the outer wall of the friction driving wheel under the action of the downward pressing spring, and the turnover arm moves to the inside of the connecting rod.

[0018] Preferably, a hinge is installed between one end of the gland and the printing seat, the other end of the gland is provided with a clamping piece, the top of the gland is installed with a starting switch, and the front end of the gland is provided with a discharging opening matched with the anti-scratch paper tearing knife.

[0019] Preferably, the clamping piece comprises a sliding handle slidingly arranged on the outer wall of the gland, one end of the sliding handle is fixedly provided with a fixed bolt in the inside, the other end of the sliding handle is provided with a locking spring in the inside, and the top of the printing seat is provided with a fixed groove matched with the fixed bolt.

[0020] Technical effects and advantages of the present application:

[0021] 1. The heat-sensitive desktop bar code printer capable of adapting to various paper widths, through the two sides of the paper roll fixing piece, the outer wall of the center positioning clamp is slidably arranged, the synchronous driving piece is arranged between the center positioning block and the center positioning clamp, so as to adapt to different widths of the paper roll, and the paper roll is centrally arranged on the paper feeding channel. When in use, the width of the heat-sensitive paper roll is controlled according to the width specification to control the rotation of the driving motor, so that the driving motor drives the second driving gear to rotate, the second driving gear is engaged with the second transmission gear, thereby driving the bidirectional screw rod to rotate. At this time, the two groups of connecting arms are synchronously moved to the middle along the bidirectional screw rod, thereby driving the two groups of center positioning clamps and the two groups of center positioning blocks to move to the middle. On the one hand, the heat-sensitive paper roll of different width specifications can be centrally installed, and on the other hand, the discharge end of the heat-sensitive paper can be centrally discharged.

[0022] 2. The heat-sensitive desktop bar code printer capable of adapting to various paper widths, when printing, the driving rubber roller rotates to synchronously drive the friction driving wheel to rotate, at this time, the friction driving wheel is in contact with the friction wheel, so that the scratch-proof paper cutter overcomes the elastic force of the pressing spring to be twisted, so that the sawtooth-shaped paper cutter is kept upwardly tilted to be separated from the surface of the heat-sensitive paper during the printing process. When the printing is completed, the driving rubber roller stops rotating, at this time, under the action of the elastic force of the pressing spring, the outer end of the scratch-proof paper cutter has a downward tilting trend, and the elastic force of the pressing spring is greater than the gravity of the friction wheel and the tilting arm at this time, so that the friction wheel slides upward along the outer wall of the friction driving wheel, and the tilting arm is retracted to the inside of the connecting rod. Finally, the sawtooth-shaped paper cutter is pressed on the surface of the heat-sensitive paper, so that the printed matter can be torn down after the printing is completed, thereby avoiding the scratch of the printed matter by the sawtooth-shaped paper cutter during printing, and avoiding paper jam. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall outer surface structure of the present application;

[0024] Figure 2 It is a schematic diagram of the opening state of the gland of the present application;

[0025] Figure 3 It is a schematic diagram of the internal structure of the gland of the present application;

[0026] Figure 4 It is a schematic diagram of the internal top structure of the printing seat of the present application;

[0027] Figure 5 It is a schematic diagram of the side structure of the printing seat of the present application;

[0028] Figure 6 It is a schematic diagram of the outer surface structure of the paper feeding channel of the present application;

[0029] Figure 7 It is a schematic diagram of the outer surface structure of the paper roll fixing piece and the synchronous driving piece of the present application;

[0030] Figure 8 Fig. 1 is a schematic diagram of the outer surface structure of the paper roll of the present application;

[0031] Figure 9 Fig. 2 is a schematic diagram of the friction drive wheel and the anti-scratch paper tearing knife when the friction drive wheel is at rest;

[0032] Figure 10 Fig. 3 is a schematic diagram of the friction drive wheel and the anti-scratch paper tearing knife when the friction drive wheel is rotating;

[0033] Figure 11 Fig. 4 is a schematic diagram of the outer wall structure of the anti-scratch paper tearing knife.

[0034] In the figure: 1, a printing seat; 12, a paper winding station; 13, a fixing groove; 14, a transmission groove; 2, a pressing cover; 22, a visual window; 23, a starting switch; 24, a discharge port; 25, a clamping piece; 251, a sliding handle; 252, a fixed bolt; 253, a locking spring; 3, a paper winding fixing piece; 31, a winding shaft clamping seat; 32, a paper winding shaft; 33, a centering positioning clamp; 34, a supporting part; 35, a sliding rail; 36, a limiting sliding groove; 37, an insertion port; 38, a sliding block; 39, a clamping block; 310, a limiting baffle; 311, a limiting clamping block; 4, a paper feeding channel; 42, an anti-sticking protrusion; 43, a movable groove; 44, a centering positioning block; 5, a driving rubber roller; 52, a first transmission gear; 53, a servo motor; 54, a first driving gear; 55, a dust cover; 56, a friction drive wheel; 6, a paper pressing balance block; 7, a thermal sensitive sheet; 8, an anti-scratch paper tearing knife; 82, a hinged part; 83, a pressing spring; 84, a connecting rod; 85, a friction wheel; 86, a turnover arm; 9, a synchronous driving piece; 91, a driving motor; 92, a second driving gear; 93, a bidirectional screw rod; 94, a second transmission gear; 95, a connecting arm. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0036] The present application provides a Figures 1 to 11The illustrated one can adapt to a variety of paper width thermal desktop bar code printer, including printing seat 1 and set in the top of the printing seat 1 cover 2, cover set in the control connection for and computer or mobile terminal Bluetooth module, external computer or mobile terminal through the Bluetooth module to print content, print quantity and related parameter settings, so that the device can output different print, printing seat 1 in one end is provided with a paper fixing piece 3, printing seat 1 in the other end is provided with a paper path 4, the top of the paper path 4 both sides of the slide is provided with a centering block 44, the both sides of the outer wall of the paper fixing piece 3 is provided with a centering clamp 33, the centering block 44 and the centering clamp 33 are provided with a synchronous drive 9, so as to adapt to different width of the paper, and the paper is centrally provided on the paper path 4;

[0037] The outer end of the paper path 4 is provided with a drive rubber roller 5, the bottom of the cover 2 and located outside the drive rubber roller 5 is rotatably provided with a scratch preventing paper cutter 8, the outer end of the scratch preventing paper cutter 8 is provided with a sawtooth shaped paper cutter edge, and the top of the sawtooth shaped paper cutter edge is provided with a pressing spring 83, so that the sawtooth shaped paper cutter edge is closely attached to the paper in the natural state; the inner end of the scratch preventing paper cutter 8 is provided with a flip arm 86, the flip arm 86 is in transmission connection with the drive rubber roller 5, so that when the drive rubber roller 5 drives the paper to move, the flip arm 86 pulls the scratch preventing paper cutter 8 to twist, thereby avoiding the sawtooth shaped paper cutter edge pressing the paper.

[0038] The printing seat 1 is provided with a paper winding station 12, the top of the paper path 4 is integrally formed with an anti-sticking convex strip 42, one end of the paper path 4 is downwardly bent and inclined to extend into the paper winding station 12, the other end of the paper path 4 is upwardly inclined and tangent to the outer wall of the drive rubber roller 5, the inner bottom of the cover 2 is installed with a paper pressing balance block 6 opposite to the paper path 4, and the front end of the paper pressing balance block 6 is installed with a thermal sensitive sheet 7.

[0039] The paper fixing piece 3 includes a reel clamp seat 31 integrally formed on both sides of the inside of the paper winding station 12, a paper reel shaft 32 is movably inserted into the reel clamp seat 31, the centering clamp 33 is slidably arranged on the outer wall of both ends of the paper reel shaft 32, the cover 2 is provided with a visual window 22 opposite to the paper reel shaft 32, and a limiting block 311 opposite to the reel clamp seat 31 and a limiting bar 310 limiting the top opening of the centering clamp 33 are fixedly arranged below the visual window 22.

[0040] The outer wall of the paper winding shaft 32 is provided with a limiting sliding groove 36, the bottom of both ends of the limiting sliding groove 36 is provided with an insertion opening 37, the inner side of the center positioning clamp 33 is integrally formed with a sliding block 38, the inner top of the center positioning clamp 33 is integrally formed with a clamping block 39, the sliding block 38 enters the limiting sliding groove 36 through the insertion opening 37, and the clamping block 39 tightly abuts against the outer wall of the paper winding shaft 32, the top of the center positioning clamp 33 is limited between the two groups of limiting baffle strips 310, so that the center positioning clamp 33 can tightly abut against the outer wall of the paper winding shaft 32 and move along the limiting sliding groove 36.

[0041] The inner bottom of the paper winding station 12 is fixedly provided with a sliding rail 35, the bottom of the center positioning clamp 33 is integrally formed with a supporting portion 34, the supporting portion 34 is slidingly connected outside the sliding rail 35, the top of the paper feeding channel 4 is provided with a movable groove 43, a center positioning block 44 is slidingly connected in the movable groove 43, and the synchronous driving member 9 is installed between the supporting portion 34 and the center positioning block 44.

[0042] The synchronous driving member 9 comprises a connecting arm 95 fixedly arranged between the supporting portion 34 and the center positioning block 44, the inside of the printing seat 1 is rotatably provided with a bidirectional screw rod 93, the two groups of connecting arms 95 are respectively threadedly connected to the outer surfaces of both ends of the bidirectional screw rod 93, the middle portion of the bidirectional screw rod 93 is fixedly installed with a second transmission gear 94, the printing seat 1 is fixedly provided with a driving motor 91, and the output end of the driving motor 91 is fixedly provided with a second driving gear 92 engaged with the second transmission gear 94.

[0043] Both sides of the printing seat 1 are provided with transmission grooves 14, both ends of the driving rubber roller 5 are installed with first transmission gears 52, the first transmission gears 52 are rotatably arranged in the transmission grooves 14, the printing seat 1 is fixedly installed with a servo motor 53, and the output end of the servo motor 53 is fixedly installed with a first driving gear 54 engaged with the first transmission gear 52.

[0044] The outer side of the driving rubber roller 5 is provided with a dust cover 55 fixedly installed with the printing seat 1, the top of the dust cover 55 is integrally formed with an anti-sticking convex strip 42, the sawtooth-shaped paper tearing blade of the anti-scratching paper tearing knife 8 is opposite to the anti-sticking convex strip 42, the turnover arm 86 is located in the transmission groove 14, the inner side of the first transmission gear 52 is coaxially fixedly installed with a friction driving wheel 56, and the anti-sticking convex strip 42 can reduce the contact friction when the thermal paper moves, so as to avoid paper jamming.

[0045] The top of the anti-scratch and tear paper knife 8 is fixedly installed with a hinge part 82, which is rotatably disposed in the pressure cover 2. Both sides of the anti-scratch and tear paper knife 8 are fixedly connected with connecting rods 84. The flipping arm 86 is movably inserted into the connecting rods 84. The bottom end of the flipping arm 86 is fixedly provided with a friction wheel 85, which is in contact with the outer wall of the friction drive wheel 56. The friction drive wheel 56 drives the rubber roller 5, so that the friction wheel 85 is squeezed and pushed below the friction drive wheel 56, thereby causing the outer end of the anti-scratch and tear paper knife 8 to flip upward. When the friction drive wheel 56 stops rotating, the friction wheel 85 slides upward along the outer wall of the friction drive wheel 56 under the action of the downward spring 83, and the flipping arm 86 moves inward into the connecting rod 84.

[0046] When the driving rubber roller 5 rotates, it synchronously drives the friction drive wheel 56 to rotate. The friction drive wheel 56 provides a continuous downward dynamic friction force to the friction wheel 85. At the same time, the friction wheel 85 has a downward tendency to move under the action of the tilting arm 86 and its own gravity; and the direction of the friction force is the same as the direction of the movement tendency of the tilting arm 86, so that the friction wheel 85 drives the tilting arm 86 to slide downward. During this process, the friction wheel 85 moves from the upper position to the lower position of the friction drive wheel 56. The whole process is as follows: Figures 9 to 10 As shown in the diagram, the lateral position of the flipping arm 86 changes, causing the anti-scratch tear blade 8 to twist against the force of the pressing spring 83. This keeps the serrated tear blade edge pointing upwards and detaching from the thermal paper surface during printing. When printing is complete, the drive rubber roller 5 stops rotating. At this time, the drive rubber roller 5 no longer provides dynamic friction to the friction wheel 85. Under the force of the pressing spring 83, the outer end of the anti-scratch tear blade 8 tends to flip downwards. The force of the pressing spring 83 is greater than the weight of the friction wheel 85 and the flipping arm 86 at this time. This causes the friction wheel 85 to slide upwards along the outer wall of the friction drive wheel 56, while the flipping arm 86 retracts into the connecting rod 84. Finally, the serrated tear blade edge presses against the thermal paper surface, making it easy to tear and remove the printed material after printing.

[0047] A hinge is installed between one end of the pressure cover 2 and the print base 1. A snap-fit ​​part 25 is provided at the other end of the pressure cover 2. The snap-fit ​​part 25 includes a sliding handle 251 that is slidably disposed on the outer wall of the pressure cover 2. A fixing pin 252 is fixedly disposed on the inner side of one end of the sliding handle 251. A locking spring 253 is disposed on the inner side of the other end of the sliding handle 251. A fixing groove 13 that matches the fixing pin 252 is opened on the top of the print base 1. When the sliding handle 251 is pressed towards the end close to the locking spring 253, the fixing pin 252 slides to one side. At this time, the pressure cover 2 is flipped and closed on the top of the print base 1. When the sliding handle 251 is released, the bottom end of the fixing pin 252 is inserted into the inside of the fixing groove 13 under the action of the locking spring 253, thereby fixing the pressure cover 2.

[0048] The top of the cover 2 is provided with a start switch 23, and the front end of the cover 2 is provided with a discharge port 24 matched with the scratch-proof paper cutter 8. A main control circuit board is installed in the cover 2, and the main control circuit board is started and controlled through the start switch 23. A wireless communication module is arranged on the main control circuit board, so as to be connected with an APP on a mobile terminal for control. The device is controlled through the APP to upload the printing content and control the motor to start and stop.

[0049] Working principle: the heat-sensitive desktop barcode printer capable of adapting to various paper widths is provided. A Bluetooth module is built-in. When in use, the whole device is started by pressing the start switch 23. When started, the Bluetooth module is automatically started to generate a Bluetooth signal. At this time, a computer or other mobile terminal is connected through searching for the Bluetooth signal, so as to realize control connection with the computer or the mobile terminal. Barcode printing software is installed on the computer or the wireless terminal. The label size matched with the label paper used is set by using the printing software. Then, the content such as barcode and text is added. Then, the printing copies are set in the software. After previewing and confirming that the barcode and the content layout are correct, the printing program is started to print.

[0050] In use, the heat-sensitive paper roll is sleeved on the outer surface of the paper roll shaft 32. Then, the two ends of the paper roll shaft 32 are installed opposite to the roll shaft clamping seat 31. The paper roll shaft 32 is inserted into the two sets of center positioning clamps 33. At this time, the sliding block 38 on the center positioning clamp 33 enters the limiting sliding groove 36 along the insertion opening 37 on the outer surface of the paper roll shaft 32. The clamping block 39 on the inner side of the center positioning clamp 33 is attached to the outer surface of the paper roll shaft 32. Then, the end of the heat-sensitive paper roll is passed between the two sets of center positioning blocks 44 and finally passes out from the top of the dust cover 55. At this time, the driving motor 91 is controlled to rotate according to the width specification of the heat-sensitive paper roll. The driving motor 91 drives the second driving gear 92 to rotate. The second driving gear 92 is engaged with the second transmission gear 94, so as to drive the bidirectional lead screw 93 to rotate. At this time, the two sets of connecting arms 95 are synchronously moved to the middle along the bidirectional lead screw 93, so as to drive the two sets of center positioning clamps 33 and the two sets of center positioning blocks 44 to move to the middle. On the one hand, the heat-sensitive paper roll with different width specifications can be centrally installed. On the other hand, the discharge end of the heat-sensitive paper can be centrally discharged.

[0051] The device controls the rotation direction and rotation number of the driving motor 91 according to a control program pre-written in the main control circuit board inside the cover 2, wherein the control program includes multiple gears for controlling the rotation number of the driving motor 91, each gear corresponds to a rotation number of the driving motor 91, and the rotation number is used to control the distance between the two sets of center positioning clamps 33 and the distance between the two sets of center positioning blocks 44; the control program also includes a reset signal, which is used to control the driving motor 91 to rotate reversely by a corresponding number of rotations according to the pre-set rotation number, so that the two sets of center positioning clamps 33 and the two sets of center positioning blocks 44 move to the sides to reset, facilitating the disassembly and assembly of the paper roll shaft 32.

[0052] After the installation and positioning of the thermal paper are completed, the sliding handle 251 is pressed towards the end close to the locking spring 253, so that the fixed bolt 252 slides to one side. At this time, the cover 2 is flipped and closed on the top of the printing seat 1. At this time, the sliding handle 251 is released, and the bottom end of the fixed bolt 252 is inserted into the inside of the fixed groove 13 under the action of the locking spring 253, so as to realize the fixation of the cover 2. At this time, the limiting baffle 310 is located outside the two ends of the center positioning clamp 33, avoiding the opening at the top of the center positioning clamp 33 from being stretched, and the limiting block 311 is in the opening at the top of the roll shaft clamp 31, limiting the paper roll shaft 32;

[0053] At this time, the paper pressing balance block 6 and the anti-sticking convex strip 42 on the paper feeding channel 4 vertically limit the thermal paper, and press the thermal paper on the surface of the driving rubber roller 5. The serrated paper cutter on the outer end of the anti-scratch paper cutter 8 is tightly attached to the surface of the thermal paper under the action of the pressing spring 83.

[0054] At this time, the printing program is started by starting the switch 23, so that the thermal sheet 7 is heated to react with the specified area of the thermal paper, thereby presenting the corresponding developed area on the thermal paper. At the same time, the servo motor 53 is started to drive the driving rubber roller 5 to rotate, and the driving rubber roller 5 drives the thermal paper to move outward. At this time, the thermal paper roll rotates on the outer surface of the paper roll shaft 32 to release the thermal paper, and the thermal paper roll keeps the center position under the action of the two sets of center positioning clamps 33. When the thermal paper enters the paper feeding channel 4, it also keeps the center state under the action of the two sets of center positioning blocks 44.

[0055] When the rubber roller 5 is driven to rotate, the synchronous belt drives the friction driving wheel 56 to rotate, and the friction driving wheel 56 is in contact with the friction wheel 85, so that the friction driving wheel 56 provides the friction wheel 85 with a continuous downward dynamic friction force, and the friction wheel 85 has a downward movement tendency under the action of the turnover arm 86 and its own gravity; the direction of the friction force is the same as the movement tendency direction of the turnover arm 86, so that the friction wheel 85 drives the turnover arm 86 to slide downward, and in the process, the friction wheel 85 moves from the upper position of the friction driving wheel 56 to the lower position, so that the horizontal position of the turnover arm 86 changes, the scratch-proof paper cutter 8 is twisted to overcome the elastic force of the pressing spring 83, and the serrated paper cutter is kept upward in the printing process to be separated from the surface of the thermal paper.

[0056] When the printing is completed, the rubber roller 5 stops rotating, the friction wheel 85 is no longer provided with the dynamic friction force by the rubber roller 5, the outer end of the scratch-proof paper cutter 8 has a downward turning movement tendency under the action of the elastic force of the pressing spring 83, and the elastic force of the pressing spring 83 is greater than the gravity of the friction wheel 85 and the turnover arm 86, so that the friction wheel 85 slides upward along the outer wall of the friction driving wheel 56, the turnover arm 86 is retracted into the connecting rod 84, and finally the serrated paper cutter is pressed on the surface of the thermal paper, so that the printed matter is torn and taken down after the printing is completed.

[0057] Finally, it should be noted that the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the above-mentioned embodiments are described in detail, those skilled in the art can still modify the technical solutions recorded in the above-mentioned embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A thermal desktop bar code printer capable of adapting to various paper widths, comprising a printing seat (1) and a cover (2) arranged on the top of the printing seat (1), characterized in that, The printing seat (1) is provided with a paper roll fixing part (3) at one end, and a paper feeding channel (4) is arranged at the other end of the printing seat (1), the top of the paper feeding channel (4) is slidably provided with a centering block (44) on both sides, the outer wall of the paper roll fixing part (3) is slidably provided with a centering clamp (33) on both sides, and a synchronous driving part (9) is arranged between the centering block (44) and the centering clamp (33), so as to adapt to paper rolls of different widths, and the paper roll is centrally arranged on the paper feeding channel (4); The outer end of the paper feeding channel (4) is provided with a driving rubber roller (5), the bottom of the gland (2) and outside the driving rubber roller (5) is rotatably provided with a scratch-proof paper cutter (8), the outer end of the scratch-proof paper cutter (8) is provided with a serrated paper cutter edge, and the top of the serrated paper cutter edge is provided with a pressing spring (83), so that the serrated paper cutter edge is tightly attached to the paper roll in the natural state; the inner end of the scratch-proof paper cutter (8) is provided with a turnover arm (86), the turnover arm (86) is in transmission connection with the driving rubber roller (5), so that when the driving rubber roller (5) drives the paper roll to move, the turnover arm (86) pulls the scratch-proof paper cutter (8) to twist, thereby avoiding the serrated paper cutter edge from pressing the paper roll; The printing seat (1) is provided with a paper roll station (12), the top of the paper feeding channel (4) is integrally formed with an anti-sticking convex strip (42), both sides of the printing seat (1) are provided with a transmission groove (14), both ends of the driving rubber roller (5) are provided with a first transmission gear (52), the first transmission gear (52) is rotatably arranged in the transmission groove (14), and the printing seat (1) is fixedly provided with a servo motor (53), the output end of the servo motor (53) is fixedly provided with a first driving gear (54) engaged with the first transmission gear (52); The outer side of the driving rubber roller (5) is provided with a dust cover (55) fixedly arranged on the printing seat (1), the top of the dust cover (55) is integrally formed with the anti-sticking convex strip (42), the serrated paper cutter edge of the scratch-proof paper cutter (8) faces the anti-sticking convex strip (42), the turnover arm (86) is located in the transmission groove (14), and the first transmission gear (52) is coaxially fixedly provided with a friction driving wheel (56) on the inner side; The top of the scratch-proof paper cutter (8) is fixedly provided with a hinged part (82), the hinged part (82) is rotatably arranged in the gland (2), both sides of the scratch-proof paper cutter (8) are fixedly connected with a connecting rod (84), the turnover arm (86) is movably inserted into the connecting rod (84), and the bottom of the turnover arm (86) is fixedly provided with a friction wheel (85), and the friction wheel (85) is attached to the outer wall of the friction driving wheel (56).

2. The thermal desktop bar code printer capable of adapting to various paper widths according to claim 1, wherein, One end of the paper channel (4) is downwardly bent and extends to the paper winding station (12), and the other end of the paper channel (4) is upwardly inclined and tangent to the outer wall of the driving rubber roller (5). The inner bottom of the cover (2) is provided with a paper pressing balance block (6) opposite to the paper channel (4), and the front end of the paper pressing balance block (6) is provided with a thermal sensitive sheet (7).

3. The thermal desktop bar code printer capable of adapting to various paper widths according to claim 2, wherein, The paper winding fixing part (3) comprises a winding shaft clamping seat (31) integrally formed on both sides of the inside of the paper winding station (12), the winding shaft clamping seat (31) movably inserts a paper winding shaft (32), the centrally positioned clamps (33) are slidably arranged on the outer wall of both ends of the paper winding shaft (32), the cover (2) is provided with a visible window (22) opposite to the paper winding shaft (32), and the lower side of the visible window (22) is fixedly provided with a limiting clamping block (311) opposite to the winding shaft clamping seat (31) and a limiting blocking strip (310) for limiting the opening of the top of the centrally positioned clamps (33).

4. The thermal tabletop barcode printer capable of adapting to various paper widths according to claim 3, wherein, The outer wall of the paper winding shaft (32) is provided with a limiting sliding groove (36), the both ends of the limiting sliding groove (36) are provided with an insertion opening (37), the inner side of the centrally positioned clamps (33) is integrally formed with a sliding block (38), the inner top of the centrally positioned clamps (33) is integrally formed with a clamping block (39), the sliding block (38) enters the limiting sliding groove (36) through the insertion opening (37), and the clamping block (39) is tightly attached to the outer wall of the paper winding shaft (32), and the top of the centrally positioned clamps (33) is limited between two groups of limiting blocking strips (310), so that the centrally positioned clamps (33) can be tightly attached to the outer wall of the paper winding shaft (32) and move along the limiting sliding groove (36).

5. The thermal tabletop barcode printer capable of adapting to various paper widths according to claim 4, wherein, The inner bottom of the paper winding station (12) is fixedly provided with a sliding rail (35), the bottom of the centrally positioned clamps (33) is integrally formed with a supporting part (34), the supporting part (34) is slidably connected outside the sliding rail (35), the top of the paper channel (4) is provided with a movable groove (43), the centrally positioned block (44) is slidably connected in the movable groove (43), and the synchronous driving part (9) is installed between the supporting part (34) and the centrally positioned block (44).

6. The thermal tabletop barcode printer capable of adapting to various paper widths according to claim 5, wherein, The synchronous driving part (9) comprises a connecting arm (95) fixedly arranged between the supporting part (34) and the centrally positioned block (44), the inside of the printing seat (1) is rotatably provided with a bidirectional screw rod (93), two groups of the connecting arms (95) are respectively threadedly connected to the outer surfaces of both ends of the bidirectional screw rod (93), the middle part of the bidirectional screw rod (93) is fixedly provided with a second transmission gear (94), the printing seat (1) is fixedly provided with a driving motor (91), and the output end of the driving motor (91) is fixedly provided with a second driving gear (92) engaged with the second transmission gear (94).

7. The thermal tabletop barcode printer capable of adapting to various paper widths of claim 1, wherein, The friction drive wheel (56) rotates with the drive rubber roller (5), so that the friction wheel (85) is pressed to the lower side of the friction drive wheel (56), so that the outer end of the scratch-proof paper tearing knife (8) is turned up; when the friction drive wheel (56) is stopped, the friction wheel (85) slides upward along the outer wall of the friction drive wheel (56) under the action of the pressing spring (83), and the turnover arm (86) moves to the inside of the connecting rod (84).

8. The thermal tabletop barcode printer capable of adapting to various paper widths of claim 1, wherein, A hinge is mounted between one end of the cover (2) and the printing seat (1), the other end of the cover (2) is provided with a clamping piece (25), the top of the cover (2) is mounted with a starting switch (23), and the front end of the cover (2) is provided with a discharge port (24) matched with the scratch-proof paper tearing knife (8).

9. The thermal tabletop barcode printer capable of adapting to multiple paper widths of claim 8, wherein, The clamping piece (25) comprises a sliding handle (251) slidingly arranged on the outer wall of the cover (2), one end of the sliding handle (251) is fixedly provided with a fixed bolt (252) on the inner side, and the other end of the sliding handle (251) is provided with a locking spring (253) on the inner side. The top of the printing seat (1) is provided with a fixed groove (13) matched with the fixed bolt (252).

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