Small printer

Abstract

The invention provides a small printer which comprises an upper support and a lower support, one side of the upper support and one side of the lower support are rotationally connected, a paper inlet, a paper roll bin and a paper feeding channel are arranged between the upper support and the lower support from the rotationally connected side to the other side, and the paper inlet and the paper feeding channel are both communicated with the paper roll bin. The small printer is a portable thermosensitive A4 printer and is simple in structure and convenient to use, the paper inlet communicated with the paper roll bin is formed between the upper support and the lower support, so that single or strip-shaped paper can enter the paper feeding channel from the paper inlet to be printed, meanwhile, the printer is further provided with the paper roll bin, roll paper can be printed, and the printing efficiency is improved. Therefore, the limitation that a traditional printer is provided with a single paper feeding mode and can only print paper rolls is changed, and the practicability of equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of printers, in particular to a small printer. Background Art

[0002] The working principle of a thermal printer is that a semiconductor heating element is installed on the print head. After the print head is heated and contacts the thermal printing paper, the required pattern can be printed. Its principle is similar to that of a thermal fax machine. The image is generated by heating and causing a chemical reaction in the film. The chemical reaction of this type of thermal printer is carried out at a certain temperature, and high temperature will accelerate this chemical reaction.

[0003] Most existing printers only have one paper roll compartment, and the paper roll must be placed in the paper roll compartment before printing can be performed, and the paper feeding method is single.

[0004] In view of this, the inventor specially designed a small printer, and this case was thus generated. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a small printer, by providing a paper feed port connected to a paper roll bin between an upper bracket and a lower bracket, so that a single sheet or a strip of paper can enter a paper feeding channel through the paper feed port for printing, and the printer is also provided with a paper roll bin for printing roll paper, thereby overcoming the limitation brought by only having a paper roll bin at present.

[0006] According to the present invention, a small printer is provided, comprising an upper bracket and a lower bracket which are rotatably connected at one side. The upper bracket and the lower bracket are rotatably connected from one side to the other side to set a paper feed port, a paper roll bin and a paper feeding channel, and the paper feed port and the paper feeding channel are both communicated with the paper roll bin.

[0007] The small printer of the present invention is provided with a paper feed port connected to a paper roll bin between an upper support and a lower support, so that a single sheet or a strip of paper can enter a paper feeding passage through the paper feed port for printing. Meanwhile, the printer is also provided with a paper roll bin for printing roll paper, thereby changing the single paper feeding mode of a traditional printer and the limitation that it can only print on paper rolls, thereby improving the practicality of the device.

[0008] In some embodiments of the present invention, the printer further includes an upper cover and a lower cover, a printing assembly and a rubber roller assembly, the upper bracket is arranged in the upper cover, the lower bracket is arranged in the lower cover, the printing assembly is arranged on the upper bracket, and the rubber roller assembly is arranged on the lower bracket corresponding to the printing assembly.

[0009] In some embodiments of the present invention, the printing component includes a thermal print head, a fixing frame, a substrate and a spring, wherein N springs are provided, and N ≥ 2; the substrate is provided with P hooks and Q buckles along any two opposite sides, wherein the number of P and N is both greater than or equal to 2; the fixing frame is provided with a hanging groove cooperating with the hook, and also with a buckle groove cooperating with the buckle; the spring is provided between the fixing frame and the substrate, and the thermal print head is provided on the substrate.

[0010] In some embodiments of the present invention, hooks and buckles are provided on both sides of the long side of the substrate, and correspondingly, hanging grooves and buckles are provided on both sides of the long side of the fixing member.

[0011] In some embodiments of the present invention, the substrate further comprises a support plate for mounting the thermal print head, and the hooks and buckles are located on both sides of the long sides of the support plate.

[0012] In some embodiments of the present invention, the buckle includes a first connecting portion connected to the support plate and a first hook portion connected to the first connecting portion, and the first hook portion and the first connecting portion form an angle α, and the angle α is an obtuse angle.

[0013] In some embodiments of the present invention, the fixing frame includes a main body, a first connecting plate and a second connecting plate arranged on both sides of the main body, the hanging groove is arranged on the first connecting plate, and the card slot is arranged on the second connecting plate.

[0014] In some embodiments of the present invention, a protrusion for spring sleeve is provided on the main body; the spring is a conical spring, the smaller end of which abuts against the fixing frame, and the larger end of which abuts against the base plate.

[0015] In some embodiments of the present invention, the printer also includes a cover opening structure; the cover opening structure includes a driving assembly, a cover opening assembly, and a torsion spring, the driving assembly is provided in two groups and both are installed on the lower cover, the driving assembly is slidably connected to the lower cover; the cover opening assembly is provided on the lower bracket; the torsion spring is provided in two groups and both are installed on the lower bracket, and is used to press the lower side of the cover opening assembly against the driving assembly; the driving assembly pushes the cover opening assembly to make the cover opening assembly rotate on the lower bracket.

[0016] In some embodiments of the present invention, the driving assembly includes an opening cover button arranged on the outside of the lower cover, and a button fixing block arranged on the inside of the lower cover and connected to the opening cover button; a sliding groove for sliding the opening cover button is provided on the outer wall of the lower cover, and a sliding hole connected to the inside of the opening cover is provided at the bottom of the sliding groove; the opening cover button is embedded in the sliding groove, and the end passes through the sliding hole and is connected to the button fixing block located inside the lower cover.

[0017] In some embodiments of the present invention, the cover opening button includes a pressing portion embedded in the slide groove, a mounting portion that can pass through the slide hole and connected to the button fixing block, and a connecting shaft portion for connecting the pressing portion and the mounting portion.

[0018] In some embodiments of the present invention, the cover opening assembly includes two cover opening hooks rotatably connected to the lower bracket and arranged corresponding to the two groups of driving assemblies, and a connecting rod for connecting the two cover opening hooks.

[0019] In some embodiments of the present invention, non-cylindrical connecting columns are provided at both ends of the connecting rod, and connecting holes for cooperating with the connecting columns are provided on the hook; the cover opening hook includes a rotating part rotatably connected to the lower bracket, a driven part arranged below the rotating part, and a second hook part arranged above the rotating part.

[0020] In some embodiments of the present invention, the torsion spring has an elastic portion and a first elastic arm and a second elastic arm connected to the elastic portion, wherein the first elastic arm abuts against the lower bracket and the second elastic arm abuts against the cover opening assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] in: Figure 1 It is a schematic diagram of the structure of a small printer of the present invention; Figure 2 is a cross-sectional view of a small printer of the present invention; Figure 3 is an internal side view of the small printer of the present invention; Figure 4 It is a partial schematic diagram of the small printer of the present invention. Figure 1 ; Figure 5 It is a local explosion of the small printer of the present invention Figure 1 ; Figure 6 It is a partial schematic diagram of the small printer of the present invention. Figure 2 ; Figure 7 The present invention Figure 6 A partial enlarged view of the Figure 8 It is a schematic diagram of the structure of the printing assembly of the present invention; Fig. 9 is an exploded view of the printing assembly of the present invention; Fig.10 is a cross-sectional view of a printing assembly of the present invention; Fig.11 It is a structural schematic diagram of the fixing frame of the present invention; Fig.12 It is a structural schematic diagram of the substrate of the present invention; Fig.13 It is a local explosion of the small printer of the present invention Figure 2 ; Fig.14 is a schematic diagram of the structure of the drive assembly of the present invention; Fig.15 is an exploded view of the drive assembly of the present invention; Fig.16 It is a structural schematic diagram of the cover opening assembly of the present invention; Fig.17 It is a local explosion of the small printer of the present invention Figure 3 .

[0023] Description of labels: 001, paper inlet; 002, paper roll bin; 003, paper feeding channel; 10, upper cover; 20, lower cover; 21, slide groove; 22, slide hole; 30, upper bracket; 40, lower bracket; 41, cylindrical protrusion; 42, avoidance hole; 50, printing assembly; 51, fixing frame; 511, hanging groove; 512, card slot; 513, main body; 5131, protrusion; 5132, strengthening step; 5133, first mounting hole; 514, first connecting plate; 515, second connecting plate; 52, base plate; 521, support plate; 522, hook; 523, buckle; 5231, first connecting part; 5232, first hook part; 53, spring; 54, thermal print head; 60, rubber roller assembly; 70, cutter; 80, cover opening structure; 81, drive The invention relates to a movable component; 811, a cover opening button; 8111, a pressing part; 8112, a connecting shaft; 8113, a second mounting part; 81131, a limiting step; 81132, a positioning step; 812, a button fixing block; 8121, a second mounting hole; 8122, a limiting groove; 82, a cover opening component; 821, a cover opening hook; 8211, a rotating part; 82111, a second supporting step; 8212, a driven part; 82121, a connecting hole; 8213, a second hook part; 822, a connecting rod; 8221, a connecting column; 823, a rotating shaft; 83, a torsion spring; 831, an elastic part; 832, a first elastic arm; 833, a second elastic arm; 91, a first bolt; 92, a second bolt; 93, a third bolt; 94, a fourth bolt. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] See also Figures 1 to 17 , is a small printer as the best embodiment of the present invention, comprising an upper bracket 30 and a lower bracket 40 which are rotatably connected at one side, and a paper inlet 001, a paper roll bin 002 and a paper feed passage 003 are arranged between the upper bracket 30 and the lower bracket 40 from one side of the rotation connection to the other side, and the paper inlet 001 and the paper feed passage 003 are both connected to the paper roll bin 002. The small printer of the present invention is provided with a paper inlet 001 which is connected to the paper roll bin 002 between the upper bracket 30 and the lower bracket 40, so that a single sheet or strip of paper can enter the paper feed passage 003 from the paper inlet 001 for printing, and the printer is also provided with a paper roll bin for printing roll paper, thereby changing the single paper feeding mode of the traditional printer and the limitation that it can only print on paper rolls, thereby improving the practicality of the device.

[0026] Please refer to Figure 2 , 17 The printer further comprises an upper cover 10 and a lower cover 20, a printing assembly 50 and a rubber roller assembly 60. The upper bracket 30 is arranged in the upper cover 10, and the lower bracket 40 is arranged in the lower cover 20, so the upper cover 10 and the lower cover 20 are closed, and a paper feed port 001, a paper roll bin 002 and a paper feeding channel 003 are provided between the upper bracket 30 and the lower bracket 40 in sequence, wherein the paper feed port 001 is located at one end where the upper bracket 30 and the lower bracket 40 are rotatably connected; the printing assembly 50 is arranged on the upper bracket 30, and the rubber roller assembly 60 is arranged on the lower bracket 40 corresponding to the printing assembly 50.

[0027] Please refer to Figure 8-9In some embodiments of the present invention, the printing component 50 includes a thermal print head 54, a fixing frame 51, a substrate 52 and a spring 53, wherein N springs 53 are provided, and N ≥ 2; the substrate 52 is provided with P hooks 522 and Q buckles 523 along any two opposite sides, wherein the number of P and N is both greater than or equal to 2; the fixing frame 51 is provided with a hanging groove 511 cooperating with the hook 522, and also with a buckle groove 512 cooperating with the buckle 523; the spring 53 is provided between the fixing frame 51 and the substrate 52, and the thermal print head 54 is provided on the substrate 52. The positions of the hooks 522 and the buckles 523 are set according to actual needs and can be set at equal intervals; the present invention has four hooks 522 and four hanging slots 511, four buckles 523 and four slots 512, and eight springs 53. Under the action of multiple hooks 522 and buckles 523, eight springs 53 can provide sufficient elastic force, and there is no need to worry about large deformation; the spring 53 stores elastic potential energy, and under the action of elastic potential energy, the hook 522 is tightly hung on the hanging slot 511, and the buckle 523 tightly hooks the slot 512. The printing component 50 is provided with a base plate 52 and a fixing frame 51 that cooperate with each other, and the base plate 52 is installed on the fixing frame 51 by using a hanging groove 511 to cooperate with a hook 522, and a card slot 512 to cooperate with a buckle 523. Since a plurality of hooks 522 and buckles 523 can be provided, and they are provided close to the middle position as needed, obvious deformation of the middle position of the base plate 52 is avoided, and at the same time, the installation is fast and convenient, the structure is reliable, and the stability is good. When the printer adopts the printing component 50 of the present invention, the density of the characters is more uniform when printing A4 paper.

[0028] Please refer to Fig.12 The base plate 52 is provided with hooks 522 and buckles 523 along both sides of the long side, and the corresponding fixing parts are provided with hanging grooves 511 and clamping grooves 512 along both sides of the long side. The base plate 52 also has a support plate 521 for mounting the thermal print head 54, and the hooks 522 and buckles 523 are located on both sides of the long side of the support plate 521. The support plate 521, the hook 522 and the buckle 523 are directly formed by sheet metal parts, and the forming methods are all existing technologies and will not be described in detail; the hook 522 is in a T-shape, and specifically, the sheet metal part can be stamped into a shape and then bent; the hook 522 can be arranged vertically with the support plate 521, and an acute angle is formed between the buckle 523 and the support plate 521, so as to facilitate better installation of the base plate 52 on the fixing frame 51; the buckle 523 includes a first connecting portion 5231 connected to the support plate 521 and a first hook portion 5232 connected to the first connecting portion 5231, and the first hook portion 5232 forms an angle α with the first connecting portion 5231, and the angle α is an obtuse angle, and further the angle α is 120-150°.

[0029] Please refer to Fig.11The fixing frame 51 includes a main body 513, a first connecting plate 514 and a second connecting plate 515 arranged on both sides of the main body 513, a hanging groove 511 is arranged on the first connecting plate 514, and a clamping groove 512 is arranged on the second connecting plate 515. The main body 513, the first connecting plate 514 and the second connecting plate 515 are directly formed by sheet metal parts, and the first connecting plate 514 and the second connecting plate 515 are respectively located on both sides of the long side of the main body 513. The main body 513 is U-shaped. The first connecting plate 514 is provided with a hanging groove 511 from the outside to the inside, so as to facilitate the installation of the hook 522, and the clamping groove 512 is arranged at the connection between the second connecting plate 515 and the main body 513, so as to facilitate the buckle 523 to hook the clamping groove 512. A reinforcing step 5132 is also arranged on the main body 513 to improve the pressure resistance of the main body 513, which can be directly formed during stamping, and multiple steps can be arranged at equal intervals along a straight line.

[0030] Please refer to Fig.11 A protrusion 5131 for the spring 53 to be mounted on the main body 513; the spring 53 is a conical spring 53, the smaller end of which abuts against the fixing frame 51, and the larger end abuts against the base plate 52; specifically, the smaller end of the conical spring 53 is mounted on the outer side of the protrusion 5131.

[0031] The installation method of the printing component 50 is as follows: first, the small end sleeves of the multiple springs 53 are set on the protrusion 5131 to play the role of fixing the springs 53, and then the hook 522 of the base plate 52 is embedded in the hanging groove 511 from the side of the fixing part, and then the other side of the fixing part is pressed by external force, and the buckle 523 can be embedded in the card slot 512, so as to achieve quick and convenient installation.

[0032] The cutter 70 is fastened to the upper cover 10 by two first bolts 91 , the printing assembly 50 is fastened to the upper bracket 30 by two second bolts 92 , the upper bracket 30 is fastened to the upper cover 10 by a plurality of third bolts 93 , and the second connecting plate 515 presses the cutter 70 .

[0033] The printer further includes a cutter 70, which is arranged on the upper cover 10; the cutter 70 is locked on the upper cover 10 by two first bolts 91, and the printing assembly 50 is locked on the upper bracket 30 by two second bolts 92. Specifically, a first mounting hole 5133 is directly punched out on the main body 513, so that the second bolt 92 passes through the first mounting hole 5133 and is threadedly connected to the upper bracket 30; the upper bracket 30 is locked on the upper cover 10 by a plurality of third bolts 93, and the second connecting plate 515 presses the cutter 70, and the lower bracket 40 is locked on the lower cover 20 by a plurality of fourth bolts 94. The cutter 70 can be better pressed and supported by the second connecting plate 515, so the second connecting plate 515 can press the cutter 70, so that the cutter 70 can be locked with only two first bolts 91, and at the same time, the deformation of the cutter 70 can be better prevented, thereby improving the paper cutting effect of the cutter 70. Specifically, the cutter 70 includes an L-shaped first mounting portion and a cutter 70 portion arranged on the first mounting portion. A first supporting step for supporting the first mounting portion is also arranged on the inner side of the upper cover 10, and the first mounting portion is pressed onto the first supporting step in cooperation with the second connecting plate 515. When installing the cutter 70, firstly use two first bolts 91 to lock it, and then lock the upper bracket 30 with the printing component 50 through a plurality of third bolts 93. After being locked, the second connecting plate 515 can press the first mounting portion.

[0034] Please refer to Figure 13-16 The printer further includes a cover opening structure 80; the cover opening structure 80 includes a driving assembly 81, a cover opening assembly 82, and a torsion spring 83. Two groups of driving assemblies 81 are provided and both are installed on the lower cover 20. The driving assembly 81 is slidably connected with the lower cover 20. The cover opening assembly 82 is provided on the lower bracket 40. Two torsion springs 83 are provided and both are installed on the lower bracket 40, which are used to push the lower side of the cover opening assembly 82 against the driving assembly 81. The driving assembly 81 pushes the cover opening assembly 82 so that the cover opening assembly 82 is located on the lower bracket 40 and rotates. The cover opening structure 80 modularizes the existing multiple parts by providing the driving assembly 81, the cover opening assembly 82, and the torsion spring 83. The driving assembly 81 is installed on the lower cover 20, and the cover opening assembly 82 and the torsion spring 83 are installed on the lower bracket 40. After that, the lower bracket 40 is arranged on the lower cover 20, and convenient installation can be achieved.

[0035] Please refer to Fig.13The driving component 81 includes a cover opening button 811 arranged on the outside of the lower cover 20, and a button fixing block 812 arranged on the inside of the lower cover 20 and connected to the cover opening button 811; a sliding groove 21 for the cover opening button 811 to slide is provided on the outer wall of the lower cover 20, and a sliding hole 22 communicating with the inside of the cover is provided at the bottom of the sliding groove 21; the cover opening button 811 is embedded in the sliding groove 21, and the end thereof passes through the sliding hole 22 to be connected to the button fixing block 812 located inside the lower cover 20; when installing the driving component 81, first place the button fixing block 812 inside the lower cover 20, place the cover opening button 811 in the sliding groove 21, and the end thereof passes through the sliding hole 22 to be connected to the button fixing block 812.

[0036] Please refer to Fig.14 , 15 The cover opening button 811 includes a pressing portion 8111 embedded in the sliding groove 21, a second mounting portion 8113 that can pass through the sliding hole 22 and is connected to the button fixing block 812, and a connecting shaft portion 8112 used to connect the pressing portion 8111 and the second mounting portion 8113; the outer side wall of the connecting portion between the second mounting portion 8113 and the button fixing block 812 is also provided with a limiting step 81131 for limiting the rotation of the pressing portion 8111, and the end of the second mounting portion 8113 away from the pressing portion 8111 is also provided with a locking step 81132, a second mounting hole 8121 for cooperating with the second mounting portion 8113 is provided on the inner side of the button fixing block 812, and a limiting groove 8122 for cooperating with the limiting step 81131 is also provided on the inner side of the second mounting hole 8121. The inner diameter of the mounting hole 8121 is larger than the outer diameter of the second mounting portion 8113, and the outer diameter of the positioning step 81132 is larger than the inner diameter of the second mounting hole 8121. Since the cover opening button 811 and the button fixing block 812 are both made of plastic, the positioning step 81132 can pass through the second mounting hole 8121 and get stuck under the action of external force. The positioning step 81132 and the second mounting hole 8121 are both provided with guiding inclined surfaces for easy installation, so as to facilitate the installation of the second mounting portion 8113 into the second mounting hole 8121. In this embodiment, there are two limiting steps 81131, which are symmetrically arranged on the outer side wall of the second mounting portion 8113. There are also two positioning steps 81132, which can realize the stable connection between the cover opening button 811 and the button fixing block 812. In this embodiment, bolts can also be used to install the cover opening button 811 and the button fixing block 812 on the lower cover 20.

[0037] Please refer to Fig.16The cover opening assembly 82 includes two cover opening hooks 821 which are rotatably connected to the lower bracket 40 and corresponding to the two groups of driving assemblies 81, and a connecting rod 822 for connecting the two cover opening hooks 821; non-cylindrical connecting columns 8221 are arranged at both ends of the connecting rod 822, and connecting holes 82121 for cooperating with the connecting columns 8221 are arranged on the cover opening hook 821; specifically, the lower cover 20 is provided with avoidance holes 42 for the cover opening hooks 821 to pass through. During installation, the connecting holes 82121 of the two cover opening hooks 821 are first installed on the connecting columns 8221 at both ends of the connecting rod 822, respectively, and then the cover opening hooks 821 are passed through the avoidance holes 42, and then the cover opening hooks 821 are passed through the two rotating shafts 823 respectively, so as to realize the rotational connection between the cover opening hooks 821 and the lower bracket 40.

[0038] Please refer to Fig.16 , wherein the cover-opening hook 821 comprises a rotating part 8211 rotatably connected to the lower bracket 40, a driven part 8212 arranged below the rotating part 8211, and a second hook part 8213 arranged above the rotating part 8211, wherein the rotating shaft 823 passes through the rotating part 8211 to make the cover-opening hook 821 rotatably connected to the lower bracket 40; the connecting hole 82121 is arranged on the driven part 8212 and on a side away from the driving assembly 81, and a rounded corner or an inclined angle is arranged at the lower corner of the driven part 8212 close to the driving assembly 81 for easy installation. The second hook part 8213 passes through the upper bracket 30 and hooks the upper bracket 30 to prevent the upper bracket 30 from opening, and the two cover-opening buttons 811 are pushed forward, the driven part 8212 is pushed, and the second hook part 8213 of the cover-opening hook 821 moves backward and detaches from the upper bracket 30, at which time the upper cover 10 can be automatically opened under the action of the spring 53 in the printing assembly 50.

[0039] Please refer to Fig.16 The torsion spring 83 has an elastic portion 831 and a first elastic arm 832 and a second elastic arm 833 connected to the elastic portion 831, wherein the first elastic arm 832 abuts against the lower bracket 40, and the second elastic arm 833 abuts against the cover opening assembly 82; the side wall of the rotating portion 8211 is provided with a second supporting step 82111 for the second elastic arm 833 to hook, and the lower bracket 40 is provided with a cylindrical protrusion 41 for the elastic portion 831 to be sleeved. When installing, first sleeve the elastic portion 831 on On the cylindrical protrusion 41, since the cover opening hook 821 is rotatable, when installing the torsion spring 83, the cover opening hook 821 is rotated to increase the angle between the bottom of the cover opening hook 821 and the side of the lower bracket 40 where the elastic part 831 is installed. Therefore, the first elastic arm 832 and the second elastic arm 833 can be installed in place very quickly and without much effort. After installation, the first elastic arm 832 rests on the lower bracket 40, and the second elastic arm 833 rests on the driven part 8212.

[0040] After the torsion spring 83 and the cover opening assembly 82 in this embodiment are installed to the lower bracket 40, and the two sets of driving assemblies 81 are installed to the lower cover 20, the lower bracket 40 with the torsion spring 83 and the cover opening assembly 82 is placed in the lower cover 20 with the driving assembly 81. Since the driven part 8212 is provided with a rounded corner or an inclined angle, during the downward movement of the lower bracket 40, since the bracket and other parts have their own weight, the cover opening assembly 82 only needs to be pressed down lightly, and the driven part 8212 can be pushed open, thereby realizing convenient and quick installation. After the lower bracket 40 is placed in place, it only needs to be locked with a number of bolts.

[0041] The structure and installation method of the rubber roller assembly 60 of the present invention, and the rotating connection structure between the upper bracket 30 and the lower bracket 40 are all different from the prior art. When working, the printer can be connected to the APP, and the APP Bluetooth signal is sent to the PCBA to drive the motor to rotate. The rubber roller assembly 60 is driven to rotate the paper through the reduction gear 1, the reduction gear 2, the reduction gear, and the rubber roller gear. The paper is heated on the thermal print head 54 to be discharged.

[0042] In summary, the small printer of the present invention is a portable thermal A4 printer with a simple structure and easy use. By setting a paper feed port connected to the paper roll bin between the upper bracket and the lower bracket, a single sheet or a strip of paper can enter the paper feeding channel through the paper feed port for printing. At the same time, the printer is also provided with a paper roll bin for printing roll paper, thereby changing the single paper feeding method of traditional printers and the limitation that they can only print on paper rolls, thereby improving the practicality of the equipment.

[0043] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A small printer, characterized in that: It includes an upper bracket and a lower bracket that are rotatably connected on one side. The upper bracket and the lower bracket are rotatably connected from one side to the other side to set a paper feed port, a paper roll bin and a paper feeding channel, and the paper feed port and the paper feeding channel are both communicated with the paper roll bin.

2. The small printer according to claim 1, characterized in that: The printer also includes an upper cover and a lower cover, a printing assembly and a rubber roller assembly, the upper bracket is arranged in the upper cover, the lower bracket is arranged in the lower cover, the printing assembly is arranged on the upper bracket, and the rubber roller assembly is arranged on the lower bracket corresponding to the printing assembly.

3. The small printer according to claim 2, characterized in that: The printing assembly includes a thermal print head, a fixing frame, a substrate and a spring, wherein N springs are provided, and N ≥ 2; the substrate is provided with P hooks and Q buckles along any two opposite sides, wherein the number of P and N is both greater than or equal to 2; the fixing frame is provided with a hanging groove cooperating with the hook, and also with a buckle groove cooperating with the buckle; the spring is provided between the fixing frame and the substrate, and the thermal print head is provided on the substrate.

4. The small printer according to claim 3, characterized in that: The base plate is provided with hooks and buckles along both sides of the long side, and the corresponding fixing parts are provided with hanging grooves and buckles along both sides of the long side.

5. The small printer according to claim 3, characterized in that: The fixing frame includes a main body, a first connecting plate and a second connecting plate arranged on both sides of the main body, the hanging groove is arranged on the first connecting plate, and the card slot is arranged on the second connecting plate.

6. The small printer according to claim 2, characterized in that: The printer further comprises a cover opening structure; the cover opening structure comprises a driving assembly, a cover opening assembly, and a torsion spring, the driving assembly is provided in two groups and both are installed on the lower cover, the driving assembly is slidably connected with the lower cover; the cover opening assembly is provided on the lower bracket; Two torsion springs are provided and both are mounted on the lower bracket, and are used to press the lower side of the cover opening assembly against the driving assembly; the driving assembly pushes the cover opening assembly to make the cover opening assembly rotate on the lower bracket.

7. The small printer according to claim 6, characterized in that: The driving assembly includes an opening cover button arranged on the outside of the lower cover, and a button fixing block arranged on the inside of the lower cover and connected to the opening cover button; a sliding groove for sliding the opening cover button is provided on the outer wall of the lower cover, and a sliding hole communicating with the inside of the opening cover is provided at the bottom of the sliding groove; the opening cover button is embedded in the sliding groove, and the end thereof passes through the sliding hole and is connected to the button fixing block located inside the lower cover.

8. The small printer according to claim 6, characterized in that: The cover opening assembly comprises two cover opening hooks which are rotatably connected to the lower bracket and are arranged corresponding to the two sets of driving assemblies, and a connecting rod used to connect the two cover opening hooks.

9. The small printer according to claim 8, characterized in that: Non-cylindrical connecting columns are arranged at both ends of the connecting rod, and connecting holes for cooperating with the connecting columns are arranged on the hook; the cover opening hook includes a rotating part rotatably connected to the lower bracket, a driven part arranged below the rotating part, and a second hook part arranged above the rotating part.

10. The small printer according to claim 6, characterized in that: The torsion spring comprises an elastic portion and a first elastic arm and a second elastic arm connected to the elastic portion, wherein the first elastic arm abuts against the lower bracket, and the second elastic arm abuts against the cover opening assembly.

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