Portable thermal printer easy to assemble

Abstract

The utility model discloses an easy-to-assemble portable thermal printer, belongs to the field of printing equipment, and is used for solving the problem of how to reduce the cost and the installation difficulty of line connection between a circuit board and a printing assembly which are respectively positioned in an upper shell and a lower shell. The portable thermal printer easy to assemble comprises a first shell, a first mounting plate, a second shell, a second mounting plate, a circuit board, a printing assembly and a connecting wire. The first shell is fixedly connected with the first mounting plate, and the circuit board is fixed between the first shell and the first mounting plate; the second shell is fixedly connected with the second mounting plate, and the printing assembly is mounted between the second shell and the second mounting plate; a hinge lug is arranged on the first mounting plate, and the first mounting plate is rotatably connected with the second mounting plate through the hinge lug; the second mounting plate is provided with a receding groove, the receding groove is communicated with the space between the second shell and the second mounting plate, and the hinge lug is provided with a wiring hole; the connecting line passes through the wiring hole and the abdicating groove, and two ends of the connecting line are electrically connected with the circuit board and the printing assembly respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing equipment, in particular to an easy-to-assemble portable thermal printer. BACKGROUND

[0002] In the portable thermal printer, the circuit board is usually mounted on the inner mounting plate of the upper shell, and the printing assembly is located on the inner mounting plate of the lower shell. The electrical connection line between the two needs to pass through the connecting area between the upper and lower shells. In order to realize the smooth passing of the line, the connecting area is usually equipped with a side cover, and the line needs to pass through the channel reserved by the side cover. However, this design not only increases the additional part of the side cover, but also brings additional workload in the process of installation and disassembly, thereby increasing the overall manufacturing cost and installation difficulty.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem to be solved

[0005] The embodiment of the present application provides an easy-to-assemble portable thermal printer, which can solve the problem of how to reduce the cost and installation difficulty of the line connection between the circuit board and the printing assembly located in the upper and lower shells respectively.

[0006] (II) Technical scheme

[0007] To solve the above technical problems, the present application provides the following technical scheme:

[0008] An easy-to-assemble portable thermal printer is provided, which comprises a first shell, a first mounting plate, a second shell, a second mounting plate, a circuit board, a printing assembly and a connecting line.

[0009] The first shell and the first mounting plate are fixedly connected, and the circuit board is fixed between the first shell and the first mounting plate.

[0010] The second shell and the second mounting plate are fixedly connected, and the printing assembly is mounted between the second shell and the second mounting plate.

[0011] The first mounting plate is integrally formed with a hinged lug, and is rotatably connected with the second mounting plate through the hinged lug; the second mounting plate is provided with a clearance slot matched with the hinged lug, the clearance slot is communicated with the space between the second shell and the second mounting plate, the hinged lug is provided with a wiring hole, one end of the wiring hole is communicated with the clearance slot, and the other end is communicated with the space between the first mounting plate and the circuit board; the connecting line passes through the wiring hole and the clearance slot, and two ends thereof are electrically connected with the circuit board and the printing assembly respectively.

[0012] In some embodiments, the second mounting plate is integrally formed with a convex shaft on the inner side of the clearance slot, the hinged lug is provided with a shaft hole, and the hinged lug is connected with the convex shaft through the shaft hole, so as to rotatably connect the first mounting plate with the second mounting plate.

[0013] In some embodiments, the hinged lug is limited on the inner side of the clearance slot in the length direction of the convex shaft, so that the hinged lug is matched with the convex shaft in the use state.

[0014] In some embodiments, the hinged lug, the clearance slot, the convex shaft and the shaft hole are provided with two groups, the two groups of convex shafts are coaxially arranged and oppositely directed, and the first mounting plate is limited on the convex shaft through the shaft hole.

[0015] In some embodiments, the hinged lug is hook-shaped, and the end thereof is provided with the shaft hole.

[0016] In some embodiments, the wiring hole includes an arc segment and two straight line segments, one of the straight line segments is directed to the space between the first mounting plate and the circuit board, the other straight line segment is directed to the space between the second shell and the second mounting plate, the arc segment is circular arc-shaped, and is arranged between the two straight line segments.

[0017] In some embodiments, the second mounting plate is provided with a paper warehouse for placing printing paper, the printing assembly includes a printing roller rotatably arranged on the second mounting plate, and further includes optical couplings arranged between the paper warehouse and the printing roller, the number of the optical couplings is at least two, and the optical couplings are arranged on the second mounting plate in a direction parallel to the printing roller.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0020] The easy-to-assemble portable thermal printer of this application has a hinge lug integrally formed on the first mounting plate. The hinge lug can be used to rotatably connect the first mounting plate and the second mounting plate, allowing the first and second housings to rotate relative to each other to open or close the printer. It can also accommodate connecting wires through wiring holes, enabling electrical connection between the circuit board and the printing assembly through the wiring holes and recessed slots. Compared with the wiring structure of traditional thermal printers with side covers, the easy-to-assemble portable thermal printer of this application eliminates the need for side covers when installing connecting wires, reducing the cost of wiring connections. At the same time, since there is no need to remove the side cover, the connecting wires only need to be passed through the wiring holes and recessed slots, which improves the convenience of wiring connection between the circuit board and the printing assembly and reduces the difficulty of wiring installation. Last but not least, the wiring holes and recessed slots can hide the connecting wires at the connection points, making the wiring layout more neat and aesthetically pleasing.

[0021] In a further configuration, at least two photocouplers are arranged on the second mounting plate in a direction parallel to the print roller. Compared to the traditional method of detecting paper with a single photocoupler, this design allows the printer to determine the paper position even if one photocoupler is obscured by a black mark on the paper, avoiding detection errors caused by photocoupler obstruction. Therefore, it ensures that the printer accurately detects the paper position and movement during printing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of the easily assembled portable thermal printer in the embodiments of this application;

[0024] Figure 2 This is a top view of the easily assembled portable thermal printer in the embodiments of this application;

[0025] Figure 3 yes Figure 2 Sectional view of section A.

[0026] Reference numerals: 1. First housing; 2. First mounting plate; 3. Second housing; 4. Second mounting plate; 5. Circuit board; 6. Printing assembly; 7. Connecting wire; 21. Hinge; 22. Wiring hole; 23. Shaft hole; 24. Paper tray; 41. Relief groove; 42. Protruding shaft; 43. Printing roller; 44. Optical coupler; 201. Arc segment; 202. Straight segment.

[0027] The specific embodiments of the present application have been shown by the above drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] In order to make the purposes, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely 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 any creative work are within the scope of protection of the present application.

[0030] The circuit board and the printing assembly of the portable thermal printer are usually mounted on the mounting plates inside the upper and lower shells respectively, and the lines between the circuit board and the printing assembly usually pass through the connecting part between the upper and lower shells. The connecting part needs to be provided with a side cover, and the lines pass through by opening the side cover. The use and disassembly of the side cover increase the manufacturing cost and the installation difficulty.

[0031] To solve the above technical problems, the present embodiment provides an easily assembled portable thermal printer. Referring to Figures 1 to 3 , the easily assembled portable thermal printer is a perspective view of the present embodiment, Figure 1 , the easily assembled portable thermal printer is a top view of the present embodiment, Figure 2 , the easily assembled portable thermal printer is a sectional view of section A in Figure 3 , the easily assembled portable thermal printer is a sectional view of section B in Figure 2 .

[0032] The easily assembled portable thermal printer comprises a first shell 1, a first mounting plate 2, a second shell 3, a second mounting plate 4, a circuit board 5, a printing assembly 6 and a connecting line 7.

[0033] The first shell 1 is fixedly connected with the first mounting plate 2, which can be an upper shell. The circuit board 5 is fixed between the first shell 1 and the first mounting plate 2, such as being fixed to the inner side of the first mounting plate 2.

[0034] The second shell 3 is fixedly connected with the second mounting plate 4. The printing assembly 6 is installed between the second shell 3 and the second mounting plate 4, such as being fixed to the inner side of the second mounting plate 4.

[0035] The first mounting plate 2 is integrally formed with a hinged lug 21, and is rotatably connected with the second mounting plate 4 through the hinged lug 21; the second mounting plate 4 is provided with a clearance slot 41 matched with the hinged lug 21, the clearance slot 41 is communicated with the space between the second shell 3 and the second mounting plate 4, the hinged lug 21 is provided with a wiring hole 22, one end of the wiring hole 22 is communicated with the clearance slot 41, and the other end is communicated with the space between the first mounting plate 2 and the circuit board 5; the connecting wire 7 passes through the wiring hole 22 and the clearance slot 41, and the two ends are respectively electrically connected with the circuit board 5 and the printing assembly 6.

[0036] It can be understood that the first shell 1 and the second shell 3 can be upper and lower shells respectively. The fixed connection between the first shell 1 and the first mounting plate 2, between the circuit board 5 and the first mounting plate 2, and between the second shell 3 and the second mounting plate 4 can be realized by screws or buckles. The installation of the printing assembly 6 between the second shell 3 and the second mounting plate 4 can adopt the existing installation mode. For example, the connecting wire 7 connects the circuit board 5 and the printing assembly 6, and needs to pass through the elements or components controlled by the circuit board 5, such as a driving motor for driving the roller to rotate, or a light coupling detection component.

[0037] The above technical solution of the easy-to-assemble portable thermal printer integrally forms the hinged lug 21 on the first mounting plate 2. The hinged lug 21 can realize the rotatable connection between the first mounting plate 2 and the second mounting plate 4, so that the first shell 1 and the second shell 3 can be relatively rotated to open or close. The hinged lug 21 also accommodates the connecting wire 7 through the wiring hole 22, so that the connecting wire 7 can be electrically connected between the circuit board 5 and the printing assembly 6 after passing through the wiring hole 22 and the clearance slot 41. Compared with the wiring structure of the side cover of the traditional thermal printer, the above technical solution of the easy-to-assemble portable thermal printer does not use the side cover when installing the connecting wire 7, reduces the cost of line connection, and at the same time, since the side cover does not need to be disassembled, only the connecting wire 7 needs to pass through the wiring hole 22 and the clearance slot 41, the convenience of line connection between the circuit board 5 and the printing assembly 6 can be improved, and the installation difficulty of the line is reduced. Finally, but also importantly, the wiring hole 22 and the clearance slot 41 can hide the connecting wire 7 at the connection, so that the line layout is more regular and beautiful.

[0038] In one embodiment in which the first mounting plate 2 is rotatably connected with the second mounting plate 4 through the hinged lug 21, referring to Figure 3As shown, the second mounting plate 4 is integrally formed with a protruding shaft 42 on the inner side of the accommodation slot 41, and the hinged lug 21 is provided with a shaft hole 23 and connected with the protruding shaft 42 through the shaft hole 23 to rotatably connect the first mounting plate 2 and the second mounting plate 4. The diameter and length of the protruding shaft 42 are set according to the needs to ensure that it can not only provide sufficient support force, but also make the hinged lug 21 keep smooth when rotating, and the diameter of the shaft hole 23 matches the diameter of the protruding shaft 42 to ensure the rotatable cooperation between them. Compared with the traditional way of using a separate rotating shaft to connect the first mounting plate 2 and the second mounting plate 4, the protruding shaft 42 integrally formed on the second mounting plate 4 replaces the rotating shaft, further reducing the use of parts and the corresponding rotating shaft installation operation, and further reducing the production cost and installation difficulty of the product.

[0039] In order to improve the stability of the hinged lug 21 and the protruding shaft 42 in the use state, referring to Figure 2 As shown, the hinged lug 21 is limited in the length direction of the protruding shaft 42 on the inner side of the accommodation slot 41, that is, the accommodation slot 41 limits the movement space of the hinged lug 21 along the length direction of the protruding shaft 42 through the two opposite slot walls, so that the hinged lug 21 keeps cooperation with the protruding shaft 42 in the use state. This limiting structure not only improves the stability of the printer while reducing the fitting distance between the first and second housings 3, but also avoids the failure caused by the falling of the hinged lug 21.

[0040] Further, referring to Figure 2 As shown, the hinged lug 21, the accommodation slot 41, the protruding shaft 42 and the shaft hole 23 are provided with two groups, the two groups of protruding shafts 42 are coaxially arranged and oppositely directed, and the first mounting plate 2 is limited on the protruding shaft 42 through the shaft hole 23. The two groups of protruding shafts 42 are coaxially arranged and oppositely directed, which makes the first mounting plate 2 and the second mounting plate 4 have stronger support force at the connection, improves the stability of the connection, and also makes the printer more smooth when folding and unfolding.

[0041] Exemplarily, referring to Figure 3 As shown, the hinged lug 21 adopts a hook structure, which not only improves the connection stability of the hinged lug 21 and the protruding shaft 42, but also makes the printer more smooth when folding and unfolding. The end of the hook-shaped hinged lug 21 is provided with a shaft hole 23 for connecting with the protruding shaft 42.

[0042] Exemplarily, referring to Figure 3 As shown, the wiring hole 22 includes an arc segment 201 and two straight line segments 202, one of which is directed to the space between the first mounting plate 2 and the circuit board 5, and the other is directed to the space between the second housing 3 and the second mounting plate 4. The arc segment 201 is in the shape of a circular arc and is arranged between the two straight line segments 202 to smoothly connect the connecting line 7, so that the connecting line 7 can more easily pass through the wiring hole 22 and avoid being blocked or bent.

[0043] In one embodiment of the printing assembly 6, referring to FIG. 2, Figure 1 and Figure 2 The second mounting plate 2 is provided with a paper bin 24 for placing printing paper, and the printing assembly 6 comprises a printing roller 43 rotatably arranged on the second mounting plate 4, and further comprises optical couplings 44 arranged between the paper bin 24 and the printing roller 43, the number of the optical couplings 44 is at least two, and the optical couplings 44 are arranged on the second mounting plate 4 in a direction parallel to the printing roller 43. The optical coupling 44 is a prior art sensor for detecting the position of the paper, and its working principle is to detect the presence or absence of the paper by light sensing. The difference between the present application and the prior art thermal printer lies in that the number of the optical couplings 44 is at least two, and the optical couplings 44 are arranged on the second mounting plate 4 in a direction parallel to the paper bin 24 and the printing roller 43. Compared with the conventional single optical coupling 44 for detecting the paper, even if one optical coupling 44 is blocked by the black mark on the paper, the position of the paper can still be determined by the other optical couplings 44, so that the detection error caused by the blocking of the optical coupling 44 can be avoided, and thus the position and movement of the paper during the printing process can be accurately detected.

[0044] The above description is only optional embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An easy-to-assemble portable thermal printer, characterized in that, include: First housing, first mounting plate, second housing, second mounting plate, circuit board, printing assembly, and connecting wires; The first housing is fixedly connected to the first mounting plate, and the circuit board is fixed between the first housing and the first mounting plate; The second housing is fixedly connected to the second mounting plate, and the printing assembly is installed between the second housing and the second mounting plate; The first mounting plate has an integrally formed hinge lug, which is rotatably connected to the second mounting plate. The second mounting plate has a relief groove adapted to the hinge lug, which communicates with the space between the second housing and the second mounting plate. The hinge lug has a wiring hole, one end of which communicates with the relief groove, and the other end of which communicates with the space between the first mounting plate and the circuit board. The connecting wire passes through the wiring hole and the relief groove, and its two ends are electrically connected to the circuit board and the printing assembly, respectively.

2. The easy-to-assemble portable thermal printer according to claim 1, characterized in that, The second mounting plate has a protruding shaft integrally formed on the inner side of the relief groove, and the hinge ear has a shaft hole and is connected to the protruding shaft through the shaft hole, so as to realize the rotatable connection between the first mounting plate and the second mounting plate.

3. The easy-to-assemble portable thermal printer according to claim 2, characterized in that, The hinge lug is positioned inside the relief groove along the length of the convex shaft so that the hinge lug remains engaged with the convex shaft during use.

4. The easy-to-assemble portable thermal printer according to claim 2, characterized in that, The hinge lug, clearance groove, cam shaft, and shaft hole are provided in two sets. The two sets of cam shafts are coaxially arranged and face opposite directions. The first mounting plate is limited to the cam shaft through the shaft hole.

5. The easy-to-assemble portable thermal printer according to claim 2, characterized in that, The hinge lug is hook-shaped and has the shaft hole at its end.

6. The easy-to-assemble portable thermal printer according to claim 1 or 5, characterized in that, The wiring hole includes an arc segment and two straight segments, wherein one of the straight segments faces the space between the first mounting plate and the circuit board, and the other straight segment faces the space between the second housing and the second mounting plate. The arc segment is arc-shaped and is located between the two straight segments.

7. The easy-to-assemble portable thermal printer according to claim 1, characterized in that, The second mounting plate is provided with a paper tray for placing printing paper. The printing assembly includes a printing roller rotatably disposed on the second mounting plate, and also includes an optical coupler disposed between the paper tray and the printing roller. The number of optical couplers is at least two, and they are arranged on the second mounting plate in a direction parallel to the printing roller.

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