CN220447486U

CN220447486U - Thermal printer

Info

Publication number: CN220447486U
Application number: CN202321212008.5U
Authority: CN
Inventors: 范文燚; 林东明
Original assignee: Zhuhai Baolitu Electronic Technology Co ltd
Current assignee: Zhuhai Baolitu Electronic Technology Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2024-02-06
Anticipated expiration: 2033-05-18

Abstract

The utility model provides a thermal printer, which comprises an upper cover component and a main component which are combined with each other, wherein the main component comprises a shell and a paper bin for placing imaging media, and the thermal printer is characterized in that the upper cover component and the main component are combined through a connecting part, the connecting part comprises a connecting component and a matching component, the connecting component and the upper cover component are integrally formed, and the matching component and at least one of the shell and the paper bin are integrally formed.

Description

Thermal printer

Technical Field

The utility model relates to the field of printing, in particular to a thermal printer.

Background

The thermal printer is widely applied to storage logistics, cashing and other scenes, and generally adopts a thermal mode to form images or characters on thermal paper, and then the imaged paper is taken out; thermal printers generally include a main assembly and a cap assembly coupled to each other, and in the related art, the cap assembly and the main assembly are coupled by a hinge shaft, which has a possibility of falling off, which is disadvantageous in that the cap assembly and the main assembly are stably coupled.

Disclosure of Invention

In view of the above-mentioned technical problems, the present utility model provides a thermal printer that facilitates stable connection of an upper cover assembly and a main assembly.

The utility model provides a thermal printer, which comprises an upper cover component and a main component which are combined with each other, wherein the main component comprises a shell and a paper bin for placing imaging media.

The paper bin comprises a side wall arranged on the same side as the connecting part, the matching assembly comprises a paper bin mounting part arranged on the side wall and an avoidance groove, the paper bin mounting part comprises a first mounting part main body, a second mounting part main body, a first mounting part and a second mounting part, the first mounting part and the second mounting part are respectively arranged on the first mounting part main body and the second mounting part main body and are oppositely arranged in the left-right direction, and the avoidance groove is positioned between the first mounting part and the second mounting part.

Further, the connecting assembly comprises a first connecting main body, a second connecting main body, a first connecting end, a second connecting end and a notch part, wherein the first connecting end and the second connecting end are respectively arranged on the first connecting main body and the second connecting main body and oppositely arranged in the left-right direction, the notch part is positioned between the first connecting main body and the second connecting main body, the first connecting end is matched with the first installation part, and the second connecting end is matched with the second installation part.

In some embodiments, one of the first connection end and the first mounting portion is configured as an aperture or a mounting slot, the other is configured as a protrusion, and one of the second connection end and the second mounting portion is configured as an aperture or a mounting slot, the other is configured as a protrusion, and the protrusion enters the aperture or the mounting slot.

In some other embodiments, the housing includes a first housing and a second housing that are coupled to each other in a left-right direction, the mating assembly further includes a housing mounting portion including a third mounting portion and a fourth mounting portion that are disposed opposite to each other in the left-right direction, the third mounting portion being disposed on the first housing, the fourth mounting portion being disposed on the second housing, the first connection end being mated with the first mounting portion and the third mounting portion, and the second connection end being mated with the second mounting portion and the fourth mounting portion. One of the first mounting part and the second mounting part is designed as an opening or a slot, the other is also designed as an opening or a slot, the slot is formed in the up-down direction and the opening is upward, one of the third mounting part and the first connecting end is designed as a protrusion, the other is designed as a through hole or a matching slot, one of the fourth mounting part and the second connecting end is designed as a protrusion, the other is designed as a through hole or a matching slot, and the protrusion passes through the first mounting part or the second mounting part and enters the through hole or the matching slot.

In some other embodiments, the connection assembly includes a connection assembly body and a through hole provided on the connection assembly body, the through hole penetrating the connection assembly body in a left-right direction; the shell comprises a first shell and a second shell which are combined with each other in the left-right direction, the matching component further comprises a shell installation part, the shell installation part comprises a third installation part and a fourth installation part which are oppositely arranged in the left-right direction, the third installation part is arranged on the first shell, the fourth installation part is arranged on the second shell, and the through hole is used for matching with the third installation part or the fourth installation part; one of the first mounting part and the second mounting part is designed as an opening or a slot, the other is also designed as an opening or a slot, and the slot is formed in the up-down direction and the opening is upward; one of the third mounting part and the fourth mounting part is designed as a positioning column, the other one is designed as a through hole or a matching groove, and the positioning column passes through the first mounting part, the through hole and the second mounting part and enters the through hole or the matching groove. When the third installation part or the fourth installation part is designed to be a through hole or a matching groove, the shell at the position of the third installation part or the fourth installation part is provided with a protection part, and the protection part extends from the shell to the rear of the thermal printer.

Drawings

Fig. 1 is a perspective view of a thermal printer according to the present utility model.

Fig. 2 is a perspective view of a thermal printer portion assembly according to the present utility model.

Fig. 3 is a perspective view of the thermal printer according to the present utility model with the first housing hidden.

Fig. 4 is a perspective view of the thermal printer according to the present utility model after the grip portion is hidden.

Fig. 5A is a perspective view of a cap assembly according to a first embodiment of the present utility model.

Fig. 5B is a perspective view of a paper tray according to a first embodiment of the present utility model.

Fig. 6A is a perspective view of a paper tray according to a second embodiment of the present utility model.

Fig. 6B is a schematic diagram of a second housing according to a second embodiment of the present utility model.

Fig. 7A is a perspective view of a cap assembly according to a third embodiment of the present utility model.

Fig. 7B is an exploded view of a thermal printer according to a third embodiment of the present utility model, with a part of the components hidden, with the second housing separated from the first housing.

Detailed Description

The structure of the thermal printer according to the present utility model will be described in detail with reference to the accompanying drawings.

(integral Structure of thermal Printer)

FIG. 1 is a perspective view of a thermal printer according to the present utility model; FIG. 2 is a perspective view of a thermal printer portion assembly in accordance with the present utility model; FIG. 3 is a perspective view of the thermal printer of the present utility model with the first housing hidden; fig. 4 is a perspective view of the thermal printer according to the present utility model after the grip portion is hidden.

As shown in fig. 1, the thermal printer 100 includes a main assembly 10 and an upper cover assembly 20 coupled to each other, a grip portion 22 is coupled to either the main assembly 10 or the upper cover assembly 20 so that a user can take the thermal printer 100, and the upper cover assembly 20 is provided to be coupled to the main assembly 10 and to be reversible with respect to the main assembly 10, and a coupling portion 102 where the main assembly 10 and the upper cover assembly 20 are coupled to each other is referred to as a coupling portion 102. The main assembly 10 and the upper cover assembly 20 may be mechanically locked or magnetically locked, and when the mechanical locking is adopted, the upper cover assembly 20 is further provided with an unlocking means, which is operated by a user to unlock the main assembly 10 and the upper cover assembly 20.

For convenience of description, first, the thermal printer 100 is defined as follows, as shown in fig. 1, in which in a normal placement state of the thermal printer 100, a height direction of the thermal printer 100 is an up-down direction, a width direction is a left-right direction, the up-down direction and the left-right direction intersect, preferably, the up-down direction and the left-right direction are perpendicular to each other, a direction intersecting both the up-down direction and the left-right direction is a front-back direction, preferably, the front-back direction is perpendicular to the up-down direction and the left-right direction, a side where the main assembly 10 and the upper cover assembly 20 are connected to each other is a rear side, and a side opposite to the rear side is a front side.

As shown in fig. 1 and 3, the main assembly 10 includes a housing 11, a hopper 30, a paper cutting mechanism 50 for cutting off an image forming medium supplied to the paper outlet 21, the paper outlet 21 being located on the opposite side of the connection portion 102, a paper outlet 21, and an electronic assembly 140, in which a rolled image forming medium is mounted in the hopper 30 when the thermal printer 100 is in operation. At least a portion of the paper magazine 30, at least a portion of the paper cutting mechanism 50, and at least a portion of the electronic component 140 are all disposed in the cavity 12 defined by the housing 11, preferably, the housing 11 includes a first housing 11a and a second housing 11b (as shown in fig. 1) coupled in the left-right direction, respectively, disposed on the left and right sides of the paper magazine 30, the cavity 12 is disposed between the first housing 11a and the second housing 11b, and the paper outlet 21 is also disposed between the first housing 11a and the second housing 11 b.

The first housing 11a includes a main housing 11a1 extending in the up-down direction and the front-rear direction and an extension housing 11a2 connected to the main housing 11a1, at least a part of the notch 11a3 is formed on the extension housing 11a2, the second housing 11b has substantially the same structure as the first housing 11a, and also includes a main housing 11b1 extending in the up-down direction and the front-rear direction and an extension housing 11b2 connected to the main housing 11b1, at least a part of the notch 11b3 is formed on the extension housing 11b2, the notch 11a3 and the notch 11b3 are opposed in the left-right direction when the first housing 11a and the second housing 11b are combined, the cutter mechanism 50 is installed in the cavity 12, and a part of the cutter mechanism 50 is exposed from the notch 11a3/11b 3. As shown in fig. 4, the housing 11 is provided with an exposure port 1a1 on a side opposite to the side on which the paper outlet 21 is located, and the connection portion 102 is exposed from the exposure port 1a 1.

Example one

Fig. 5A is a perspective view of a cap assembly according to a first embodiment of the present utility model; fig. 5B is a perspective view of a paper tray according to a first embodiment of the present utility model.

As shown in fig. 5A and 5B, the connection part 102 includes a connection member 103 provided on the upper cover member 20 and a coupling member 104 provided on the main member 10, at least a portion of the connection member 103 being coupled with the coupling member 104 so that the upper cover member 20 and the main member 10 are coupled with each other.

The connecting assembly 103 comprises a first connecting body 1a3, a second connecting body 1b3, a first connecting end, a second connecting end and a notch 1c3, the upper cover assembly 20 further comprises a bottom wall (not shown in the figure) facing the main assembly, the first connecting body 1a3 and the second connecting body 1b3 extend downwards from the bottom wall to form, the first connecting end is arranged on the first connecting body 1a3, the second connecting end is arranged on the second connecting body 1b3, the first connecting body 1a3 and the second connecting body 1b3 are oppositely arranged at intervals in the left-right direction, the notch 1c3 is arranged to facilitate deformation when the connecting assembly 103 is matched with the matching assembly 104, so that the upper cover assembly 20 is conveniently installed on the main assembly 10, and raw materials can be saved at the same time; the first connection end is designed as a first protrusion 1a31, and the first protrusion 1a31 is formed by extending leftwards from the first connection main body 1a 3; the second connection end is designed as a second protrusion 1b31, the second protrusion 1b31 is formed to extend rightward from the second connection body 1b3, and in other embodiments, the first protrusion 1a31 may be formed to extend rightward from the first connection body 1a3, and the second protrusion 1b31 may be formed to extend leftward from the second connection body 1b 3.

The connecting component 103 and the upper cover component 20 are integrally formed, the number of parts of the upper cover component 20 can be reduced, the situation that the upper cover component 20 and the main component 10 are combined unstably due to fit gaps among the parts is prevented, meanwhile, the assembling steps can be reduced, and the assembly efficiency is improved.

The paper bin 30 comprises a left wall 121 and a right wall 122 which are oppositely arranged at intervals in the left-right direction, a paper bin interior 127 is formed between the left wall 121 and the right wall 122, the paper bin 30 further comprises a side wall 31 which is arranged on the same side as the connecting part 102, the side wall 31 extends in the up-down direction and the left-right direction to form, and the matching component 104 comprises a paper bin mounting part and an avoiding groove 1c4 which are arranged on the side wall 31; the paper bin mounting part comprises a first mounting part main body 1a4, a second mounting part main body 1b4, a first mounting part and a second mounting part, wherein the first mounting part and the second mounting part are respectively arranged on the first mounting part main body 1a4 and the second mounting part main body 1b4 and are oppositely arranged at intervals in the left-right direction, the first mounting part is a first opening 1a41 arranged at the left side of the avoidance groove 1c4, and the second mounting part is a second opening 1b41 arranged at the right side of the avoidance groove 1c4; the first opening 1a41 penetrates the first mounting portion body 1a4 in the left-right direction, the second opening 1b41 penetrates the second mounting portion body 1b4 in the left-right direction, the first protrusion 1a31 can enter the first opening 1a41, the second protrusion 1b31 can enter the second opening 1b41, and in other embodiments, the first mounting portion and the second mounting portion can be designed as mounting grooves as long as the first protrusion 1a31 can enter the first mounting portion and the second protrusion 1b31 can enter the second mounting portion; the side wall 31 of the paper bin 30 further comprises a protruding block 311 formed by extending backwards in the front-rear direction, the protruding block 311 is located below the first installation part and the second installation part, the avoidance groove 1c4 is formed by encircling the first installation part main body 1a4, the second installation part main body 1b4 and the protruding block 311 and is located between the first installation part main body 1a4 and the second installation part main body 1b4, and when the connecting component 103 is matched with the matching component 104, at least one part of the notch part 1c3 enters the avoidance groove 1c4; the first connection end and the second connection end can be connected with the first installation part and the second installation part from the inside of the avoidance groove 1c4 respectively, and can also be connected with the first installation part and the second installation part from the outside of the avoidance groove 1c4 respectively.

In other embodiments, the first connection end and the second connection end of the connection assembly 103 are designed as holes or mounting grooves, the first mounting portion and the second mounting portion of the mating assembly 104 are designed as protrusions, the protrusions can enter the holes or mounting grooves, so that the connection assembly 103 is connected with the mating assembly 104, or one of the first connection end and the second connection end of the connection assembly 103 is designed as a hole or mounting groove, the other is designed as a protrusion, and corresponding one of the first mounting portion and the second mounting portion of the mating assembly 104 is designed as a protrusion, and the other is designed as a hole or mounting groove, the protrusions can enter the holes or mounting grooves, so that the connection assembly 103 is connected with the mating assembly 104.

Example two

FIG. 6A is a perspective view of a paper tray according to a second embodiment of the utility model; fig. 6B is a schematic diagram of a second housing according to a second embodiment of the present utility model.

As shown in fig. 6A and fig. 6B, the connection component 103 according to the present embodiment is substantially the same as the first embodiment, and is not described herein again, and the mating component 104 according to the present embodiment is partially the same as the first embodiment, and is partially different from the first embodiment, and is described in the present embodiment, and the same points are not described again.

In this embodiment, the first mounting portion body 1a4 and the first mounting portion form a first mounting rail, and the second mounting portion body 1b4 and the second mounting portion form a second mounting rail; the first mounting part body 1a4 includes a first mounting body front part 1a43 and a first mounting body rear part 1a44 which are disposed in the front-rear direction, the first mounting part is a first slot 1a42 formed in the up-down direction with an upward opening, the first slot 1a42 is located between the first mounting body front part 1a43 and the first mounting body rear part 1a44, and when the connection assembly 103 is mated with the mating assembly 104, the first protrusion 1a31 enters the first slot 1a42, i.e., the first protrusion 1a31 reaches between the first mounting body front part 1a43 and the first mounting body rear part 1a 44; the upper end of the first mounting body front portion 1a43 and the upper end of the first mounting body rear portion 1a44 are not flush, facilitating the mounting of the first protrusion 1a31 into the first slot 1a42 from different directions; the second mounting guide rails and the first mounting guide rails are symmetrically arranged at intervals in the left-right direction and have the same structure, namely, the second mounting part is a second slot 1b42 with an upward opening formed in the up-down direction, the second bulge 1b31 can enter the second slot 1b42, and other identical parts are not repeated.

The fitting assembly 104 further includes a housing mounting portion including a third mounting portion and a fourth mounting portion which are disposed opposite to each other in the left-right direction, the third mounting portion and the fourth mounting portion being a first through hole (not shown in the drawing) provided in the first housing 11a and a second through hole 1e41 provided in the second housing 11b, respectively, the first protrusion 1a31 being insertable into the first through hole, the second protrusion 1b31 being insertable into the second through hole 1e41, the third mounting portion and the fourth mounting portion being also designed as fitting grooves as long as the first protrusion 1a31 is insertable into the third mounting portion, the second protrusion 1b31 being insertable into the fourth mounting portion.

In the embodiment, the shell 11 and the paper bin 30 are matched with the connecting component 103 at the same time, so that the upper cover component 20 can be matched with the main component 10 more stably; meanwhile, the design of the mounting guide rail is convenient for the bulge to enter, and the shell 11 can be mounted after the bulge enters the mounting guide rail, so that the assembly mode is easier to realize.

In other embodiments, the third mounting portion and the fourth mounting portion of the mating component 104 are designed as protrusions integrally formed with the housing, one of the first mounting portion and the second mounting portion of the mating component 104 is designed as an opening or slot, the other is also designed as an opening or slot, the slot is formed in the up-down direction and the opening is upward, the first connection end and the second connection end of the connection component 103 are designed as through holes or mating slots, and the protrusions can pass through the first mounting portion or the second mounting portion and enter into the through holes or the mating slots, so that the connection component 103 is connected with the mating component 104; or one of the third mounting portion and the fourth mounting portion of the fitting assembly 104 is designed as a through hole or a fitting groove, the other is designed as a protrusion, one of the first mounting portion and the second mounting portion of the fitting assembly 104 is designed as an opening or a slot, the other is also designed as an opening or a slot, the slot is formed in the up-down direction and the opening is upward, correspondingly, one of the first connecting end and the second connecting end of the connecting assembly is designed as a protrusion, the other is designed as a through hole or a fitting groove, and the protrusion can pass through the first mounting portion or the second mounting portion to enter the through hole or the fitting groove, so that the connecting assembly 103 is connected with the fitting assembly 104.

Example III

Fig. 7A is a perspective view of a cap assembly according to a third embodiment of the present utility model; fig. 7B is an exploded view of a rear portion assembly of a hidden cover assembly of a thermal printer according to a third embodiment of the present utility model.

As shown in fig. 7A and 7B, the paper magazine 30 according to this embodiment is substantially the same as the first embodiment or the second embodiment, and will not be described again here, but the connection assembly 103 and the housing 11 according to this embodiment are different from the first embodiment and the second embodiment, and the differences will be described in this embodiment.

In the present embodiment, the connection assembly 103 includes a connection assembly body 1d3 and a through hole 1e3 provided in the connection assembly body 1d3, the connection assembly body 1d3 is formed to extend downward from the bottom wall of the upper cover assembly 20, and the through hole 1e3 penetrates the connection assembly body 1d3 in the left-right direction.

The fitting assembly 104 further includes a housing mounting portion including a third mounting portion and a fourth mounting portion disposed opposite to each other in the left-right direction, the third mounting portion being a positioning column 1d42 disposed on the first housing 11a, the positioning column 1d42 extending rightward in the left-right direction and being integrally formed with the housing 11a, the positioning column 1d42 being capable of extending into the through hole 1e3 and extending from the right side of the through hole 1e 3; the fourth mounting portion is a second through hole 1e41 provided in the second housing 11b, and at least a portion of the positioning column 1d42 protruding from the through hole 1e3 can be inserted into the second through hole 1e41, and the fourth mounting portion may be designed as a fitting groove as long as at least a portion of the positioning column can enter the fourth mounting portion.

The housing 11 where the second through hole 1e41 is located may further be provided with a protecting portion 1e42, the protecting portion 1e42 being formed to extend from the housing 11 to the rear of the thermal printer 100, the protecting portion 1e42 protecting the second through hole 1e41.

In other embodiments, the fourth mounting portion is a positioning post disposed in the second housing, where the positioning post can extend into the through hole 1e3 and extend from the left side of the through hole 1e3, the third mounting portion is a first through hole disposed in the first housing, at least a portion of the positioning post extending from the through hole 1e3 can extend into the first through hole, and the third mounting portion may be configured as a mating groove, so long as at least a portion of the positioning post can enter the third mounting portion. The housing 11 where the first through hole is located may further be provided with a protection portion formed to extend from the housing 11 to the rear of the thermal printer 100, the protection portion being for protecting the first through hole.

The positioning column in the embodiment not only can be connected with the upper cover assembly 20 and the main assembly 10, but also can play a role in positioning when the first shell 11a and the second shell 11b are assembled, and meanwhile, the shell 11 and the paper bin 30 are matched with the connecting assembly 103 at the same time, so that the upper cover assembly 20 and the main assembly 10 can be matched more stably; the integrated forming of the positioning column and the housing is beneficial to reducing the number of parts of the upper cover assembly 20, preventing the combination of the upper cover assembly 20 and the main assembly 10 from being unstable due to fit gaps between the parts, and reducing assembly steps to improve assembly efficiency.

In other embodiments, the design of the mating assembly 104 according to the first embodiment, the second embodiment or the third embodiment may be disposed on the housing 11 and integrally formed with the housing 11, i.e., the design of the mating assembly 104 according to the embodiment does not involve the paper bin 30, and the design of the connection portion may be simplified to simplify the structure of the thermal printer, which is beneficial to improving the processing efficiency and reducing the assembling steps.

The utility model provides a thermal printer, which comprises an upper cover component and a main component which are combined with each other, wherein the main component comprises a shell and a paper bin for placing imaging media, the upper cover component and the main component are combined through a connecting part, the connecting part comprises a connecting component and a matching component, the connecting component and the upper cover component are integrally formed, and the matching component and at least one of the shell and the paper bin are integrally formed.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limited thereto. It should be noted that modifications to the embodiments described above, or equivalents of some of the features, may be made by those skilled in the art without departing from the principles of the present utility model; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present utility model.

Claims

1. The utility model provides a thermal printer, includes upper cover subassembly and the main assembly that combines each other, the main assembly includes casing and places the paper storehouse of imaging medium, its characterized in that, upper cover subassembly and main assembly pass through connecting portion and combine, connecting portion include coupling assembling and cooperation subassembly, coupling assembling and upper cover subassembly integrated into one piece, cooperation subassembly and at least one integrated into one piece in casing and the paper storehouse.

2. The thermal printer of claim 1 wherein the cartridge includes a side wall disposed on a same side as the connecting portion, the mating assembly includes a cartridge mounting portion disposed on the side wall and a relief slot, the cartridge mounting portion includes a first mounting portion body, a second mounting portion body, a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are disposed on the first mounting portion body and the second mounting portion body, respectively, and are disposed opposite each other in a lateral direction, the relief slot being disposed between the first mounting portion and the second mounting portion.

3. The thermal printer of claim 2 wherein the connector assembly comprises a first connector body, a second connector body, a first connector end, a second connector end, and a notch portion, the first connector end and the second connector end being disposed on the first connector body and the second connector body, respectively, and disposed opposite one another in a lateral direction, the notch portion being disposed between the first connector body and the second connector body, the first connector end being mated with the first mounting portion, and the second connector end being mated with the second mounting portion.

4. A thermal printer according to claim 3 wherein one of the first connection end and the first mounting portion is configured as an aperture or mounting slot and the other is configured as a projection, and one of the second connection end and the second mounting portion is configured as an aperture or mounting slot and the other is configured as a projection, the projection entering the aperture or mounting slot.

5. A thermal printer according to claim 3, wherein the housing comprises a first housing and a second housing which are coupled to each other in a left-right direction, the mating assembly further comprises a housing mounting portion including a third mounting portion and a fourth mounting portion which are disposed opposite to each other in the left-right direction, the third mounting portion being disposed on the first housing, the fourth mounting portion being disposed on the second housing, the first connection end being mated with the first mounting portion and the third mounting portion, and the second connection end being mated with the second mounting portion and the fourth mounting portion.

6. The thermal printer of claim 5 wherein one of the first and second mounting portions is configured as an aperture or slot and the other is also configured as an aperture or slot, the slot being formed in the up-down direction and opening upward, one of the third and first connecting ends being configured as a boss and the other being configured as a through hole or mating slot, one of the fourth and second connecting ends being configured as a boss and the other being configured as a through hole or mating slot, the boss passing through the first or second mounting portion and into the through hole or mating slot.

7. The thermal printer of claim 2, wherein the connection assembly comprises a connection assembly body and a through-hole provided in the connection assembly body, the through-hole penetrating the connection assembly body in a left-right direction.

8. The thermal printer of claim 7, wherein the housing comprises a first housing and a second housing coupled to each other in a left-right direction, the fitting assembly further comprises a housing mounting portion including a third mounting portion and a fourth mounting portion disposed opposite to each other in the left-right direction, the third mounting portion being disposed on the first housing, the fourth mounting portion being disposed on the second housing, and the through hole being for fitting with the third mounting portion or the fourth mounting portion.

9. A thermal printer according to claim 8, wherein one of the first and second mounting portions is designed as an opening or slot, the other is also designed as an opening or slot, the slot is formed in the up-down direction and the opening is upward, one of the third and fourth mounting portions is designed as a positioning post, the other is designed as a through hole or mating slot, and the positioning post passes through the first mounting portion, the through hole and the second mounting portion and into the through hole or mating slot.

10. The thermal printer of claim 9, wherein the third mounting portion or the fourth mounting portion is configured as a through hole or a mating groove, and the housing at which the third mounting portion or the fourth mounting portion is located is provided with a protection portion, and the protection portion is formed to extend from the housing to the rear of the thermal printer.