Printing apparatus

Abstract

The utility model relates to the technical field of printers, in particular to a printing device. The printing device comprises a first shell, a second shell, a third shell, a printing assembly, a paper roll and a signal terminal. The first shell is provided with a rotating part and a clamping part, and the rotating part and the clamping part are located on the same side of the first shell. A groove is formed in the second shell, a connecting shaft is arranged on the side wall of the groove, and the rotating part is rotationally connected with the connecting shaft; the second shell is provided with a first containing groove and a second containing groove. The paper roll is contained in the first containing groove. A clamping groove is formed in the printing assembly. An avoiding groove is formed in the bottom of the third shell, and a through hole is formed in the third shell. The signal wiring end is contained in the receding groove, one end of the signal wiring end penetrates through the through hole to be connected with the printing assembly, and the other end of the signal wiring end is configured to be connected with a signal source. The printing device can improve the working efficiency of roll paper replacement, and time and labor are saved; the safety is higher, the service life is prolonged, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a printing device. Background Art

[0002] At present, printers have been widely used in all aspects of life, especially some thermal printing devices, which have become one of the conventional equipment in business places such as stations, banks, supermarkets, etc. due to their relatively low cost, fast printing speed and good printing effect. In some business processing procedures, by setting up corresponding printing devices, it can greatly improve the efficiency of work and save customers' waiting time in line.

[0003] As we all know, the consumables in the printing device are rolls of paper. When the roll of paper is exhausted, the staff needs to replace it with a new roll of paper in time so that the printing device can continue to operate normally. However, in the current printing device, the process of replacing the roll of paper is relatively cumbersome. The staff needs to use an additional screwdriver to disassemble the cover of the printing device before replacing the new roll of paper. Finally, the cover needs to be reassembled with a screwdriver. The operation is cumbersome, time-consuming and labor-intensive, and reduces work efficiency.

[0004] In addition, the signal terminals of the printing device in the prior art are all exposed outside the housing of the printing device, which increases the risk of electric shock and poses certain safety hazards; at the same time, the signal terminals are easily physically damaged by external foreign objects, affecting their service life.

[0005] Therefore, it is urgent to design a printing device to solve the above technical problems. Utility Model Content

[0006] The utility model aims to provide a printing device, which can improve the working efficiency of replacing roll paper, save time and labor; at the same time, the printing device has high safety, can reduce safety hazards, extend service life and save costs.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a printing device, comprising:

[0009] A first shell, wherein a rotating portion and a clamping portion are provided on the first shell, and the rotating portion and the clamping portion are both located on the same side of the first shell;

[0010] A second shell, wherein a groove is provided on the second shell, a connecting shaft is provided on the side wall of the groove, and the rotating part is rotatably connected to the connecting shaft; the second shell has a first containing groove and a second containing groove;

[0011] A paper roll, the paper roll is wound with printing paper, and the paper roll is accommodated in the first accommodating groove;

[0012] A printing assembly, the printing assembly is accommodated in the second accommodating groove, and one end of the paper roll is connected to the printing assembly; the printing assembly is provided with a card slot;

[0013] The second housing is provided with a through slot, and the clamping portion passes through the through slot and is clamped and connected with the clamping slot; the side wall of the first housing and the side wall of the through slot form a gap for the printing paper to pass through;

[0014] A third shell, the third shell is located below the second shell, and the third shell is detachably connected to the second shell, and the printing assembly is connected to the inner bottom wall of the third shell; a avoidance groove is provided at the bottom of the third shell, and a through hole is opened on the third shell;

[0015] A signal terminal is accommodated in the avoidance groove, one end of the signal terminal passes through the through hole and is connected to the printing component, and the other end of the signal terminal is configured to be connected to a signal source.

[0016] As an optional technical solution for the printing device, a mounting hole is provided on the rotating portion, the connecting shaft is passed through the mounting hole, and the connecting shaft is loosely matched with the mounting hole.

[0017] As an optional technical solution of the printing device, the number of the rotating part and the number of the connecting shafts are both two, and the rotating part and the connecting shafts are arranged in one-to-one correspondence.

[0018] As an optional technical solution of the printing device, the printing device also includes a connecting arm, one end of the connecting arm is connected to the first shell, the other end of the connecting arm is connected to the rotating part, and the connecting arm is arranged at a right angle to the rotating part.

[0019] As an optional technical solution for the printing device, the clamping portion is a plurality of rubber studs arranged at equal intervals.

[0020] As an optional technical solution for a printing device, a first limiting portion and a second limiting portion are provided on the side of the second shell facing the first shell, the first limiting portion extends along a first direction, the second limiting portion extends along a second direction, and the first direction and the second direction are perpendicular to each other; a first limiting plate and a second limiting plate are provided on the first shell, the first limiting portion is used to limit the first limiting plate, and the second limiting portion is used to limit the second limiting plate.

[0021] As an optional technical solution of the printing device, a serration portion is provided on the side wall of the through slot, and the serration portion is arranged opposite to the first shell.

[0022] As an optional technical solution of the printing device, the inner bottom wall of the third shell is provided with a positioning column, and the printing device also includes a fixing member, and the printing component is connected to the positioning column through the fixing member.

[0023] As an optional technical solution of the printing device, the avoidance groove is arched toward a third direction, and along the third direction, the avoidance groove and the first accommodating groove are staggered.

[0024] As an optional technical solution of the printing device, reinforcing ribs are provided on the first shell, the second shell and the third shell.

[0025] The beneficial effects of the utility model include at least:

[0026] The utility model provides a printing device, which includes a first shell, a second shell, a third shell, a printing assembly, a paper roll and a signal terminal. The first shell is provided with a rotating part and a clamping part, and the rotating part and the clamping part are both located on the same side of the first shell. The second shell is provided with a groove, and a connecting shaft is provided on the side wall of the groove, and the rotating part is rotatably connected with the connecting shaft; the second shell has a first accommodating groove and a second accommodating groove. The paper roll is wound by printing paper, and the paper roll is accommodated in the first accommodating groove. The printing assembly is accommodated in the second accommodating groove, and one end of the paper roll is connected with the printing assembly; the printing assembly is provided with a clamping groove. The second shell is provided with a through groove, and the clamping part passes through the through groove and is clamped and connected with the clamping groove; the side wall of the first shell and the side wall of the through groove form a gap for the printing paper to pass through, so that the printing paper that has been printed can be easily transported out of the gap. The third shell is located below the second shell, and the third shell is detachably connected with the second shell, and the printing assembly is connected with the inner bottom wall of the third shell; the bottom of the third shell is provided with an avoidance groove, and the third shell is provided with a through hole. The signal terminal is accommodated in the avoidance groove, and one end of the signal terminal passes through the through hole to be connected with the printing component, and the other end of the signal terminal is configured to be connected to the signal source.

[0027] The first shell and the second shell are rotatably connected through the rotating part, and the clamping part is clamped and connected with the card slot on the printing component, so that the first shell and the second shell are buckled, and then the first shell can cover and seal the first receiving slot, so that the paper roll in the first receiving slot is not polluted by the outside world. When the user needs to replace the paper roll, the user can apply a little force to the first shell to release the connection between the clamping part and the card slot, and then rotate the first shell around the connecting shaft to open the first receiving slot, so that the user can easily take out the paper roll and replace it with a new one. Compared with the prior art, the user does not need to use an additional screwdriver to disassemble the first shell, thereby improving work efficiency, saving time and effort, and convenient operation. When the paper roll is replaced, the user rotates the first shell in the opposite direction around the connecting shaft, so that the clamping part passes through the through slot and is clamped again with the card slot on the printing component, so as to cover the first shell.

[0028] By arranging the signal terminal in the avoidance groove at the bottom of the third housing, when the printing device is in normal use, the avoidance groove can cover the signal terminal, so that the signal terminal will not be exposed outside the third housing of the printing device, thereby reducing the risk of electric shock to the user or short circuit of the printing device, reducing safety hazards and improving safety. In addition, the avoidance groove covers the signal terminal, which can also prevent the signal terminal from being physically damaged by foreign objects, extend the service life and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0030] Figure 1 The structure of the printing device provided by the embodiment of the utility model is shown in FIG. Figure 1 ;

[0031] Figure 2 The structure of the printing device provided by the embodiment of the utility model is shown in FIG. Figure 2 ;

[0032] Figure 3 is an exploded view of a printing device provided by an embodiment of the utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the first housing provided in the embodiment of the utility model. Figure 1 ;

[0034] Figure 5This is a schematic diagram of the structure of the first housing provided in the embodiment of the utility model. Figure 2 ;

[0035] Figure 6 This is a schematic diagram of the structure of the second housing provided by the embodiment of the utility model. Figure 1 ;

[0036] Figure 7 This is a schematic diagram of the structure of the second housing provided by the embodiment of the utility model. Figure 2 ;

[0037] Figure 8 This is a schematic diagram of the structure of the third housing provided in the embodiment of the utility model. Figure 1 ;

[0038] Fig. 9 This is a schematic diagram of the structure of the third housing provided in the embodiment of the utility model. Figure 2 .

[0039] Reference numerals

[0040] 100, first shell; 110, rotating part; 120, clamping part; 130, mounting hole; 140, connecting arm; 150, first limiting plate; 160, second limiting plate; 200, second shell; 210, groove; 220, connecting shaft; 230, first accommodating groove; 240, second accommodating groove; 250, through groove; 260, first limiting part; 270, second limiting part; 280, serrated part; 300, third shell; 310, avoidance groove; 320, through hole; 330, positioning column; 400, paper roll; 410, printing paper; 500, printing assembly; 510, clamping slot; 600, signal terminal; 700, reinforcing rib. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] This embodiment provides a printing device, which can improve the work efficiency of replacing roll paper, saving time and effort; at the same time, the printing device has high safety, can reduce safety hazards, extend service life, and save costs.

[0049] like Figure 1-Figure 9 As shown, the printing device mainly includes a first housing 100, a second housing 200, a third housing 300, a printing assembly 500, a paper roll 400 and a signal terminal 600. The first housing 100 is provided with a rotating portion 110 and a clamping portion 120, and the rotating portion 110 and the clamping portion 120 are both located on the same side of the first housing 100. The second housing 200 is provided with a groove 210, and a connecting shaft 220 is provided on the side wall of the groove 210. The rotating portion 110 is rotatably connected to the connecting shaft 220; the second housing 200 has a first accommodating groove 230 and a second accommodating groove 240. The paper roll 400 is wound by printing paper 410, and the paper roll 400 is accommodated in the first accommodating groove 230. The printing assembly 500 is accommodated in the second accommodating groove 240, and one end of the paper roll 400 is connected to the printing assembly 500; the printing assembly 500 is provided with a clamping groove 510. The second housing 200 is provided with a through slot 250, and the clamping portion 120 passes through the through slot 250 and is clamped and connected with the clamping slot 510; the side wall of the first housing 100 and the side wall of the through slot 250 form a gap for the printing paper 410 to pass through, so that the printing paper 410 that has been printed can be easily transported out of the gap. The third housing 300 is located below the second housing 200, and the third housing 300 is detachably connected to the second housing 200, and the printing assembly 500 is connected to the inner bottom wall of the third housing 300; the bottom of the third housing 300 is provided with an avoidance slot 310, and the third housing 300 is provided with a through hole 320. The signal terminal 600 is accommodated in the avoidance slot 310, and one end of the signal terminal 600 passes through the through hole 320 and is connected to the printing assembly 500, and the other end of the signal terminal 600 is configured to connect to a signal source (not shown in the figure).

[0050] Based on the above design, in this embodiment, the first housing 100 and the second housing 200 are rotatably connected through the rotating part 110, and the clamping part 120 is clamped and connected with the clamping slot 510 on the printing assembly 500, so that the first housing 100 and the second housing 200 are buckled, so that the first housing 100 can cover and seal the first receiving slot 230, so that the paper roll 400 in the first receiving slot 230 is not polluted by the outside. When the user needs to replace the paper roll 400, the user can apply a little force to the first housing 100 to release the connection between the clamping part 120 and the clamping slot 510, and then rotate the first housing 100 around the connecting shaft 220 to open the first receiving slot 230, so that the user can easily take out the paper roll 400 and replace it with a new paper roll 400. Compared with the prior art, the user does not need to use an additional screwdriver to disassemble the first housing 100, thereby improving work efficiency, saving time and effort, and convenient operation. After the paper roll 400 is replaced, the user rotates the first housing 100 in the opposite direction around the connecting shaft 220 so that the engaging portion 120 passes through the through slot 250 and engages with the engaging slot 510 on the printing assembly 500 again, thereby closing the first housing 100 .

[0051] By arranging the signal terminal 600 in the avoidance groove 310 at the bottom of the third housing 300, when the printing device is in normal use, the avoidance groove 310 can cover the signal terminal 600, so that the signal terminal 600 will not be exposed outside the third housing 300 of the printing device, thereby reducing the risk of electric shock to the user or short circuit of the printing device, reducing safety hazards, and improving safety. In addition, the avoidance groove 310 covers the signal terminal 600, which can also prevent the signal terminal 600 from being physically damaged by foreign objects, extend the service life, and save costs.

[0052] It should be noted that the printing assembly 500 and the signal terminal 600 in this embodiment are both conventional components, and therefore, their working principles and specific structures are not described in detail in this embodiment.

[0053] like Figure 4-Figure 5 As shown, in this embodiment, a mounting hole 130 is provided on the rotating part 110, and the connecting shaft 220 is passed through the mounting hole 130, and the connecting shaft 220 and the mounting hole 130 are clearance-matched. This can improve the assembly efficiency of the rotating part 110 and the connecting shaft 220 on the one hand, and facilitate the rotation of the rotating part 110 when replacing the paper roll 400 on the other hand, avoiding the interference between the connecting shaft 220 and the rotating part 110, thereby improving the reliability of the printing device.

[0054] Optionally, in this embodiment, two rotating parts 110 and two connecting shafts 220 are provided, and the rotating parts 110 and the connecting shafts 220 are provided one by one. This can improve the stability of the rotation of the first shell 100, improve the force of the first shell 100, and improve stability and reliability.

[0055] like Figure 4-Figure 5 As shown, in this embodiment, the printing device also includes a connecting arm 140, one end of the connecting arm 140 is connected to the first shell 100, and the other end of the connecting arm 140 is connected to the rotating part 110, and the connecting arm 140 and the rotating part 110 are arranged at a right angle. In this way, when the first shell 100 rotates, the interference between the first shell 100 and the second shell 200 can be reduced, thereby improving the stability of the rotation of the first shell 100.

[0056] Optionally, the clamping portion 120 and the clamping slot 510 in this embodiment can be provided in plurality, and the clamping portion 120 is provided in one-to-one correspondence with the clamping slot 510. The clamping portion 120 can be made of silicone material, which is conducive to deformation.

[0057] In some embodiments, the clamping portion 120 is a plurality of rubber protrusions arranged at equal intervals, so as to improve the stability and reliability of the clamping between the clamping portion 120 and the clamping slot 510 .

[0058] like Figure 6-Figure 7 As shown, the second shell 200 is provided with a first limiting portion 260 and a second limiting portion 270 on the side facing the first shell 100, the first limiting portion 260 extends along the first direction, the second limiting portion 270 extends along the second direction, and the first direction and the second direction are perpendicular to each other; the first shell 100 is provided with a first limiting plate 150 and a second limiting plate 160, the first limiting portion 260 is used to limit the first limiting plate 150, and the second limiting portion 270 is used to limit the second limiting plate 160, thereby reducing or avoiding the first shell 100 from shaking and being unstable in the first direction and the second direction, thereby improving the stability and reliability of the first shell 100. The first direction is Figure 6 The X-axis direction in the second direction is Figure 6 The Y-axis direction.

[0059] like Figure 6-Figure 7As shown, a serration 280 is provided on the side wall of the through slot 250 in this embodiment, and the serration 280 is arranged opposite to the first housing 100. The setting of the serration 280 is conducive to cutting the printing paper 410. For certain specific printing devices, such as a label printer, the setting of the serration 280 can be used to cut the label paper (that is, the printing paper 410), so that the printed label paper can be easily torn off directly through the serration 280, thereby improving the convenience of use. In addition, the design of the serration 280 also helps to prevent the printing paper 410 from being stuck during the paper output process. The irregular edge of the serration 280 helps the printing paper 410 to pass more smoothly, reducing the possibility of the printing paper 410 being stuck at the through slot 250 (paper output port). Furthermore, the serration 280 can increase the friction between the printing paper 410 and the side wall of the through slot 250, which helps to better fix the printing paper 410 during the printing process, prevent it from moving or sliding, thereby ensuring the quality and accuracy of printing.

[0060] like Figure 8-Figure 9 As shown, in this embodiment, the inner bottom wall of the third housing 300 is provided with a positioning column 330, and the printing device further includes a fixing member (not shown in the figure), and the printing assembly 500 is connected to the positioning column 330 through the fixing member. Optionally, the fixing member can be set as a screw or other components. The setting of the fixing member and the positioning column 330 can improve the stability and reliability of the connection between the printing assembly 500 and the third housing 300, avoid the phenomenon of shaking or displacement of the printing assembly 500 during the printing process, and ensure the quality of printing.

[0061] like Figure 3 , Figure 8-Figure 9 As shown, the avoidance groove 310 in the embodiment is arched toward the third direction, and along the third direction, the avoidance groove 310 and the first accommodating groove 230 are staggered, so that the first accommodating groove 230 and the avoidance groove 310 can be prevented from interfering with each other, and the internal space of the third shell 300 can be reasonably utilized, so that the printing device has a compact structure and a small volume, and is easy to carry and transfer. It should be noted that the third direction in this embodiment is perpendicular to both the first direction and the second direction. The third direction is Fig. 9 The Z-axis direction.

[0062] like Figure 5 , Figure 7 and Fig. 9 As shown, in this embodiment, the first shell 100, the second shell 200 and the third shell 300 are all provided with reinforcing ribs 700, so as to improve the mechanical strength of the first shell 100, the second shell 200 and the third shell 300 and extend the service life. This embodiment does not limit the number of reinforcing ribs 700, for example, five reinforcing ribs 700 can be evenly spaced on the first shell 100, the second shell 200 and the third shell 300.

[0063] Optionally, the first shell 100, the second shell 200 and the third shell 300 in this embodiment are all made of engineering plastics to reduce the weight of the printing device and facilitate the user to carry it.

[0064] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0065] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A printing device, characterized in that include: A first shell (100), wherein a rotating portion (110) and a clamping portion (120) are provided on the first shell (100), and the rotating portion (110) and the clamping portion (120) are both located on the same side of the first shell (100); A second shell (200), wherein a groove (210) is provided on the second shell (200), a connecting shaft (220) is provided on the side wall of the groove (210), and the rotating portion (110) is rotatably connected to the connecting shaft (220); the second shell (200) has a first accommodating groove (230) and a second accommodating groove (240); A paper roll (400), the paper roll (400) being formed by winding printing paper (410), and the paper roll (400) being accommodated in the first accommodation groove (230); A printing component (500), the printing component (500) being accommodated in the second accommodation groove (240), and one end of the paper roll (400) being connected to the printing component (500); a card slot (510) is provided on the printing component (500); The second housing (200) is provided with a through slot (250), and the clamping portion (120) passes through the through slot (250) and is clamped and connected with the clamping slot (510); the side wall of the first housing (100) and the side wall of the through slot (250) form a gap for the printing paper (410) to pass through; A third shell (300), the third shell (300) is located below the second shell (200), and the third shell (300) is detachably connected to the second shell (200), and the printing assembly (500) is connected to the inner bottom wall of the third shell (300); a avoidance groove (310) is provided at the bottom of the third shell (300), and a through hole (320) is opened on the third shell (300); A signal terminal (600), the signal terminal (600) is accommodated in the avoidance groove (310), and one end of the signal terminal (600) passes through the through hole (320) to be connected to the printing component (500), and the other end of the signal terminal (600) is configured to be connected to a signal source.

2. The printing device according to claim 1, characterized in that: The rotating part (110) is provided with a mounting hole (130), the connecting shaft (220) is inserted into the mounting hole (130), and the connecting shaft (220) is clearance-matched with the mounting hole (130).

3. The printing device according to claim 2, characterized in that: The number of each of the rotating part (110) and the connecting shaft (220) is two, and the rotating part (110) and the connecting shaft (220) are arranged in a one-to-one correspondence.

4. The printing device according to claim 1, characterized in that: The printing device further comprises a connecting arm (140), one end of the connecting arm (140) being connected to the first shell (100), the other end of the connecting arm (140) being connected to the rotating part (110), and the connecting arm (140) and the rotating part (110) being arranged at a right angle.

5. The printing device according to claim 1, characterized in that: The clamping portion (120) is a plurality of rubber studs arranged at equal intervals.

6. The printing device according to claim 1, characterized in that: A first limiting portion (260) and a second limiting portion (270) are provided on a side of the second shell (200) facing the first shell (100); the first limiting portion (260) extends along a first direction, and the second limiting portion (270) extends along a second direction, and the first direction and the second direction are perpendicular to each other; a first limiting plate (150) and a second limiting plate (160) are provided on the first shell (100); the first limiting portion (260) is used to limit the first limiting plate (150), and the second limiting portion (270) is used to limit the second limiting plate (160).

7. The printing device according to claim 1, characterized in that: A serration portion (280) is provided on the side wall of the through slot (250), and the serration portion (280) is arranged facing the first shell (100).

8. The printing device according to claim 1, characterized in that: The inner bottom wall of the third housing (300) is provided with a positioning column (330), and the printing device further comprises a fixing member, and the printing assembly (500) is connected to the positioning column (330) via the fixing member.

9. The printing device according to claim 8, characterized in that: The avoidance groove (310) is arched toward a third direction, and along the third direction, the avoidance groove (310) and the first accommodating groove (230) are arranged in a staggered manner.

10. The printing device according to any one of claims 1 to 9, characterized in that: The first shell (100), the second shell (200) and the third shell (300) are all provided with reinforcing ribs (700).

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