Small printer

Abstract

The invention provides a small printer, which comprises a box body assembly, an upper cover assembly and a key assembly, and is characterized in that the box body assembly comprises an outer shell and an inner bracket arranged in the outer shell; one side of the upper cover assembly is rotationally connected with the box body assembly; the key assembly is arranged on the box body assembly and used for buckling the side, away from rotation, of the upper cover assembly on the box body assembly or unlocking the upper cover assembly, the key assembly comprises an uncovering buckle, a button and a spring, and the uncovering buckle is embedded in the inner support and is in sliding connection with the inner support; the button is arranged on the inner side of the outer shell and corresponds to the uncovering buckle. According to the small printer, the mounting groove is formed in the inner bracket of the box body assembly, and the uncovering buckle of the key structure can be directly mounted in the mounting groove, so that the uncovering buckle can be conveniently and quickly mounted.

Description

Technical Field

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

[0002] Thermal label printers do not use carbon ribbon as the printing medium, but directly heat the image or text to produce a reaction on the thermal printing paper to complete the printing task. It has been widely used in POS terminal systems, banking systems, medical equipment, logistics systems and other fields.

[0003] The label printer mainly includes: an upper cover or an upper cover assembly or a flip cover, a box body and a button structure. Among them, the upper cover can rotate relative to the box body, and the button structure can control the opening and closing of the label printer. The button structure is located on the box body, and the user can open the upper cover of the label printer or close the upper cover of the label printer by pressing the button. However, the button structure in the current label printer is relatively complicated, which makes the installation relatively inconvenient.

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

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a small printer, in which a mounting groove is provided on the inner bracket of the box body assembly, and a cover opening buckle of a key structure can be directly installed in the mounting groove, so that the cover opening buckle can be conveniently and quickly installed, thereby overcoming the disadvantages of the current complex key structure.

[0006] A small printer provided according to the present invention comprises: A box body assembly, the box body assembly comprising an outer shell and an inner bracket arranged in the outer shell; An upper cover assembly, one side of which is rotatably connected to the box body assembly; A button assembly, which is arranged on the box body assembly and is used to buckle the upper cover assembly away from the rotating side onto the box body assembly or unlock the upper cover assembly, and comprises: A cover opening buckle, the cover opening buckle is embedded in the inner bracket and is slidably connected to the inner bracket; A button, which is arranged inside the outer shell and corresponds to the cover opening buckle; A spring is disposed between the cover-opening buckle and the inner bracket and applies elastic force to the cover-opening buckle so that the cover-opening buckle abuts against the button.

[0007] The small printer of the present invention is provided with a mounting groove on the inner bracket of the box body assembly, and the cover opening buckle of the key structure can be directly installed in the mounting groove, so that the cover opening buckle can be installed conveniently and quickly.

[0008] In some embodiments of the present invention, the inner bracket side wall has a mounting groove, and a second through hole connected to the mounting groove is arranged on the upper end surface, the cover opening buckle is arranged in the mounting groove, and the spring is arranged in the mounting groove and is located between the cover opening buckle and the mounting groove.

[0009] In some embodiments of the present invention, support bars are provided at the bottom and / or both sides of the installation groove.

[0010] In some embodiments of the present invention, a first rotating portion rotatably connected to the inner bracket is provided below the upper cover assembly, and a first hook cooperating with a cover opening buckle is provided below the end away from the end rotatably connected to the box body assembly, and a first hook groove cooperating with the first hook is provided above the cover opening buckle.

[0011] In some embodiments of the present invention, the first rotating part is rotatably connected to the inner bracket via a first rotating shaft; the first rotating part and the first hook are both arranged on the lower end surface of the upper cover assembly, and the first hook passes through the second through hole and cooperates with the first hook groove.

[0012] In some embodiments of the present invention, first buckles are provided on both sides of the cover opening buckle, and first limiting grooves cooperating with the first buckles are provided on the inner side walls of the installation groove. The first buckle cooperates with the first limiting groove to prevent the cover opening buckle from being pushed out of the installation groove by the spring.

[0013] In some embodiments of the present invention, a positioning groove for embedding one end of the spring is further provided on the cover opening buckle.

[0014] In some embodiments of the present invention, a first through hole in which a button is embedded and used to press the button is provided on the outer shell, and the button includes a first pressing portion embedded in the first through hole, and a second support arm provided on both sides of the first pressing portion and located inside the outer shell.

[0015] In some embodiments of the present invention, a second groove is further provided at the bottom of the back side of the outer shell, a third groove is provided at the bottom of the second groove, a magnetic attraction component is provided in the third groove, and a decorative sheet is provided in the third groove to cover the magnetic attraction component.

[0016] In some embodiments of the present invention, the magnetic attraction member has a non-circular and ring-shaped structure, and the second groove is an annular groove.

[0017] In some embodiments of the present invention, the magnetic attraction component includes a bottom plate and N magnet blocks arranged on the bottom plate, wherein the value N≥1.

[0018] In some embodiments of the present invention, the decorative sheet is made of metal.

[0019] In some embodiments of the present invention, it also includes a circuit board arranged below the inner bracket and between the inner bracket and the outer shell, two charging electrodes electrically connected to the circuit board and arranged side by side below the circuit board, and a battery electrically connected to the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] in: Figure 1 It is a structural schematic diagram of a small printer of the present invention; Figure 2 is an exploded view of the small printer of the present invention; Figure 3 The present invention Figure 2 A partial enlarged view of Figure 4 is a partial enlarged view of the upper cover assembly of the present invention; Figure 5 It is a partial enlargement of the small printer of the present invention. Figure 1 ; Figure 6 The structure of the cover opening buckle of the present invention is shown in FIG. Figure 1 ; Figure 7 The structure of the cover opening buckle of the present invention is shown in FIG. Figure 2 ; Figure 8 It is a partial enlargement of the small printer of the present invention. Figure 2 ; Fig. 9 The present invention Figure 7 A partial enlarged view of Fig.10 It is a partial enlargement of the small printer of the present invention. Figure 3 ; Fig.11 It is a structural schematic diagram of the magnetic attraction component of the present invention; Fig.12 is a partial exploded view of the small printer of the present invention; Fig.13 It is a structural schematic diagram of the outer shell of the present invention; Fig.14 The present invention Fig.13 A partial enlarged view of Fig.15 It is a schematic diagram of the interior of the small printer of the present invention.

[0022] Description of labels: 10. Box body assembly; 11. Outer shell; 111. First through hole; 112. First supporting step; 1121. First card slot; 113. Second groove; 114. Third groove; 115. Mounting hole; 1151. Second limiting groove; 1152. Third through hole; 12. Inner bracket; 121. Mounting groove; 122. Second through hole; 123. First limiting groove; 124. Support bar; 125. Paper bin; 126. Card slot; 127. Second supporting step; 1271. First card position; 128. Connecting column; 20. Upper cover assembly; 21. First rotating part; 22. First hook; 221. First inclined surface; 23. First rotating shaft ;30. Button assembly;31. Cover opening buckle;311. First hook groove;312. First snap buckle;3121. First support arm;3122. First buckling part;313. First groove;314. First protrusion;315. Avoidance position;316. Positioning groove;32. Button;321. First pressing part;322. First limiting part;323. Second support arm;33. Spring;40. Magnetic element;41. Bottom plate;42. Magnet block;401. Notch;50. Decorative sheet;60. Circuit board;61. Charging electrode;62. Battery;63. Second induction sheet;64. Charging interface 70. Paper roll;71. First induction sheet. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] See also Figures 1 to 15 , is a small printer as the best embodiment of the present invention, including a box body assembly 10, an upper cover assembly 20, and a button assembly 30. The box body assembly 10 includes an outer shell 11 and an inner bracket 12 arranged in the outer shell 11; one side of the upper cover assembly 20 is rotatably connected to the box body assembly 10; the button assembly 30 is arranged on the box body assembly 10, and is used to buckle the upper cover assembly 20 on the box body assembly 10 away from the rotating side or unlock the upper cover assembly 20. The button assembly 30 includes a cover opening buckle 31, a button 32, and a spring 33. The cover opening buckle 31 is embedded in the inner bracket 12 and is slidably connected to the inner bracket 12; the button 32 is arranged on the inner side of the outer shell 11 and is arranged corresponding to the cover opening buckle 31; the spring 33 is arranged between the cover opening buckle 31 and the inner bracket 12 and applies elastic force to the cover opening buckle 31 to make the cover opening buckle 31 abut against the button 32, wherein the cover opening buckle 31 is made of plastic and is formed in one piece by plastic material. The small printer of the present invention is provided with a mounting groove 121 on the inner bracket 12 of the box assembly 10 , and the cover opening buckle 31 of the key structure can be directly installed in the mounting groove 121 , so that the cover opening buckle 31 can be installed conveniently and quickly.

[0025] Please refer to Figure 3 , 4 The inner bracket 12 has a side wall mounting groove 121 , and a second through hole 122 communicating with the mounting groove 121 is provided on the upper end surface, the cover opening buckle 31 is provided in the mounting groove 121 , and the spring 33 is provided in the mounting groove 121 and is located between the cover opening buckle 31 and the mounting groove 121 .

[0026] Please refer to Figure 3 , 4 A support bar 124 is provided at the bottom or / and both sides of the installation groove 121, that is, one or two support bars 124 can be provided at the bottom of the installation groove 121, or one support bar 124 can be provided on each side of the installation groove 121, or one or two support bars 124 can be provided at the bottom, and one support bar 124 can be provided on each side. By providing a plurality of support bars 124, the contact area between the cover opening buckle 31 and the two sides or / and the bottom of the installation groove 121 is reduced, the friction force is reduced, and the movement process of the cover opening buckle 31 is smoother. The long side of the support bar 124 is parallel to the moving direction of the cover opening buckle 31, and can be directly formed by integral injection molding during the molding process of the cover opening buckle 31.

[0027] Please refer to Figure 2 The first rotating part 21 rotatably connected to the inner bracket 12 is provided below the upper cover assembly 20, and the first hook 22 cooperating with the cover opening buckle 31 is provided at the lower end away from the end rotatably connected to the box body assembly 10, and the first hook groove 311 cooperating with the first hook 22 is provided above the cover opening buckle 31, and the first hook groove 1121 hooks the first hook 22 to close the upper cover assembly 20, and the first hook 22 is separated from the first hook groove 1121 to open the upper cover assembly 20. The first rotating part 21 is rotatably connected to the inner bracket 12 through the first rotating shaft 23; the first rotating part 21 and the first hook 22 are both provided on the lower end surface of the upper cover assembly 20, and the first hook 22 passes through the second through hole 122 and cooperates with the first hook groove 311.

[0028] Please refer to Figure 5 , 6The first groove 313 is provided on the upper end surface of the cover opening buckle 31. Only one side wall of the four side walls of the first groove 313 is connected to the outer wall of the cover opening buckle 31 to form an opening. A first protrusion 314 is provided inside the first groove 313 away from the opening. The protrusion direction of the first protrusion 314 faces the opening. A first hook groove 311 for hooking the first hook 22 is formed between the lower part of the first protrusion 314 and the first groove 313, and a first inclined portion 314 is provided above the first protrusion 314. The inclined surface 221 or the first chamfer makes it possible for the second inclined surface or the second chamfer on the first hook 22 to cooperate with the first inclined surface 221 / first chamfer when the upper cover assembly 20 is closed, that is, to push the cover opening buckle 31 to move further into the installation groove 121 and further compress the spring 33. After reaching a certain position, the second inclined surface / second chamfer passes over the first inclined surface 221 / first chamfer, and the cover opening buckle 31 is reset under the action of the spring 33, and the first hook groove 311 hooks the first hook 22 to achieve buckling.

[0029] Please refer to Figure 5 , 6 The first buckle 312 is disposed on both sides of the cover opening buckle 31, and the first limiting groove 123 cooperating with the first buckle 312 is disposed on the inner side wall of the installation groove 121. The first buckle 312 cooperates with the first limiting groove 123 to prevent the cover opening buckle 31 from being pushed out of the installation groove 121 by the spring 33. The first buckle 312 includes a first support arm 3121 disposed on the side wall of the cover opening buckle 31, and a first buckling portion 3122 disposed at the end of the first support arm 3121 and facing outward; avoidance positions 315 are disposed on both sides of the cover opening buckle 31, and the first buckle 312 is located in the avoidance position 315. The cover opening buckle 31 is injection molded with plastic material, so the first support arm 3121 has a certain elasticity. At the same time, a third inclined surface / third chamfer is set on the outer side of the first buckling portion 3122, so that the first buckle 312 is buckled into the first limiting groove 123, so that the first buckle 312 of the cover opening buckle 31 is limited in the installation groove 121 under the cooperation of the first limiting groove 123, and at the same time, under the action of the spring 33, it is subjected to elasticity to the outside, so that the first hook 22 hooks the first hook groove 311, and the upper cover assembly 20 is covered on the inner bracket 12. The cover opening buckle 31 is manually pressed, and the spring 33 is further compressed, and the cover opening buckle 31 is further moved into the installation groove 121, and the first hook 22 will be separated from the first hook groove 311, and the upper cover assembly 20 can be opened. The cover opening buckle 31 is also provided with a positioning groove 316 for embedding one end of the spring 33. Specifically, the positioning groove 316 is located on the back side of the cover opening buckle 31 , one end of the spring 33 is embedded in the positioning groove 316 , and the other end abuts against the inner wall of the installation groove 121 .

[0030] Please refer to Figure 8 , 9The outer shell 11 is provided with a first through hole 111 in which the button 32 is embedded and used to press the button 32. The button 32 includes a first pressing portion 321 embedded in the first through hole 111, and a second supporting arm 323 disposed on both sides of the first pressing portion 321 and located inside the outer shell 11. The button 32 in the present invention may adopt another structure. Specifically, the button 32 includes a first pressing portion 321 embedded in the first through hole 111, a first limiting portion 322 disposed on the outer edge of the pressing portion and located inside the outer shell 11, and a second supporting arm 323 disposed on both sides of the first limiting portion 322 and located inside the outer shell 11; the first limiting portion 322 is in a ring shape and is located at the outer edge of a section of the pressing portion, and is used to prevent the button 32 from falling out of the outer shell 11 from the first through hole 111. A first supporting step 112 for supporting the second supporting arm 323 is also provided on the inner side of the outer shell 11, and a first card slot 1121 for embedding the second supporting arm 323 is provided on the first supporting step 112. During installation, the first pressing portion 321 is first embedded in the first through hole 111, and then the second supporting arm 323 is embedded in the first card slot 1121, which can provide good support and prevent the button 32 from shifting when the inner bracket 12 is installed, thereby affecting the installation of the inner bracket 12. Therefore, the second supporting arm 323 is used in conjunction with the first card slot 1121, which can greatly improve the convenience and efficiency of installation.

[0031] When the lock 12 is unlocked, the first and second locking assemblies 311 are unlocked and the lock 12 is unlocked.

[0032] Please refer to Fig.10, a second groove 113 is further provided at the bottom of the back of the outer shell 11, a third groove 114 is provided at the bottom of the second groove 113, a magnetic member 40 is provided in the third groove 114, and a decorative sheet 50 is provided in the third groove 114 to cover the magnetic member 40. That is, a magnetic member 40 is provided on the back of the printer. During the printing process, the printer with the magnetic member 40 is magnetically attached to the back of the mobile phone, and there is no need to hold the printer with one hand. The whole printing process is smoother and faster. If the mobile phone cannot be magnetically attached, a metal sheet can be used. Most existing mobile phones have a shell. The metal sheet can be placed in the shell and attached to the back of the mobile phone, or a back glue can be provided on the metal sheet, and the back glue can be attached to the back of the mobile phone or the handheld terminal.

[0033] Please refer to Fig.10 , 11 , the magnetic component 40 adopts a non-circular and ring-shaped structure, that is, a notch 401 is set on the ring shape; the shape of the third groove 114 is consistent with the shape of the magnetic component; the second groove 113 is an annular groove, and the decorative sheet 50 is made of metal. The magnetic component 40 is embedded in the third groove 114, and then the decorative sheet 50 is embedded in the second groove 113. The end face of the decorative sheet 50 after installation is flush with the end face of the bottom of the outer shell 11, which is more beautiful as a whole. The magnetic component 40 of the present invention can also be placed directly in the third groove 114. At least one magnetic component 40 is set, and glue or double-sided tape is set at the bottom of the third groove 114. The magnetic component 40 can be directly laid in the third groove 114. Another structure of the magnetic attraction component 40 in the present invention is: the magnetic attraction component 40 includes a base plate 41 and N magnet blocks 42 arranged on the base plate 41, where the value N ≥ 1; specifically, when multiple magnet blocks 42 are provided, the multiple magnet blocks 42 try to cover the entire base plate 41, and can be arranged in a circular array. The base plate 41 is directly adhered to the bottom of the third groove 114 by glue or double-sided tape, and the magnet blocks 42 are also adhered to the base plate 41 by glue or double-sided tape.

[0034] Please refer to Figure 2 , 12The small printer also includes a circuit board 60 disposed below the inner bracket 12 and between the inner bracket 12 and the outer shell 11, two charging electrodes 61 electrically connected to the circuit board 60 and arranged side by side below the circuit board 60, and a battery 62 electrically connected to the circuit board 60. The two charging electrodes 61 are against the inner bottom of the outer shell 11 and can be used in conjunction with a magnetic suction head to achieve charging. A charging interface 64 electrically connected to the circuit board 60 is also provided on the inner side wall of the outer shell 11. A second supporting step 127 for abutting against the circuit board 60 is provided on the inner bracket 12. A first clamping position 1271 for avoiding the charging interface 64 is provided on the second supporting step 127. The first clamping position 1271 on the second supporting step 127 can better restrict the charging interface 64 on the circuit board 60, while improving the firmness of the connection of the charging interface 64. The charging interface 64 is located above the circuit board 60, and the charging electrode 61 is provided below the circuit board 60. The circuit board 60 is also electrically connected to the battery 62. The two charging electrodes 61 provided in the present invention can realize charging of the battery 62. The battery 62 can also be charged using the charging interface 64. The battery 62 can be charged by both charging methods, which greatly improves the adaptability of the printer.

[0035] Please refer to Fig.13 , 14 15. The bottom of the outer shell 11 is provided with a mounting hole 115 for embedding the charging electrode 61 and communicating with the inside of the outer shell 11. The mounting hole 115 includes a second limiting groove 1151 located at the bottom of the inner side of the outer shell 11 and for embedding the charging electrode 61, and a third through hole 1152 provided at the bottom of the second limiting groove 1151 and communicating with the outer shell 11 and the outside. The inner diameter of the third through hole 1152 is smaller than the inner diameter of the second limiting groove 1151. The third through hole 1152 facilitates the charging device to connect the two charging electrodes 61 to charge the battery 62. Since the second limiting groove 1151 is provided to cooperate with the first clamping position 1271 on the second supporting step 127, when the inner bracket 12 is locked and fixed, the charging electrode 61 can be well confined in the second limiting groove 1151 and firmly installed.

[0036] Please refer to Fig.12, the inner bracket 12 has a paper bin 125 for placing a paper roll 70, a first sensor sheet 71 is arranged on the side wall of the paper roll 70, and a second sensor sheet 63 for sensing the first sensor sheet 71 is arranged on the circuit board 60 and at the bottom corresponding to the paper bin 125, and the second sensor sheet 63 is electrically connected to the circuit board 60, and the circuit board 60 is located between the outer shell 11 and the inner bracket 12. The first sensor sheet 71 can be used to store the information of the paper roll 70, and the first sensor sheet 71 is sensed by the second sensor sheet 63, wherein the first sensor sheet 71 adopts an NFC radio frequency device with an NFC chip. Specifically, a printer with NFC can read information from media such as labels and stickers with NFC chips, or write data into these media. When the device is close to the NFC radio frequency device, the NFC radio frequency device sends a signal, and the printer verifies and processes the signal after receiving it, and finally completes the data transmission or related operations. For details, please refer to Figure 3 A positioning groove 126 for embedding the second sensing sheet 63 is also provided on the outer side of the paper bin 125 of the inner bracket 12 so as to better limit the position of the second sensing sheet 63 .

[0037] Please refer to Figure 3 , the inner bracket 12 is provided with a plurality of connection posts 128 for mounting the circuit board 60, and the circuit board 60 is fixed to the connection posts 128 by a plurality of first screws. Specifically, a first internal threaded hole is provided on the connection post 128, and the circuit board 60 is threadedly connected to the connection post 128 by passing the first screw through the circuit board 60. The inner bracket 12 is locked to the outer shell 11 by a plurality of second screws. During installation, the circuit board 60 is first locked to the lower part of the inner bracket 12 by the first screw, and then the inner bracket 12 is locked to the outer shell 11 by the second screw.

[0038] To summarize, the small printer of the present invention has an installation groove set on the inner bracket of the box body, and the cover opening buckle and the elastic member can be directly installed in the installation groove, the spring provides elastic force to the cover opening buckle, and the first buckle and the first limiting groove are used to cooperate and limit, so as to facilitate the convenient and quick installation of the cover opening buckle; at the same time, a magnetic suction part is also provided, which can facilitate the use of the portable printer; at the same time, the printer of the present invention has a second supporting step set on the inner bracket, and at the same time, the first clamping position set on the second supporting step can position or limit the charging connector. When the charging cable is plugged in, it can avoid applying external force that causes the charging interface to deviate to both sides. Even if it is used for a long time, it can prevent the charging interface from being offset, thereby increasing the service life of the printer.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A small printer, characterized in that: include: A box body assembly, the box body assembly comprising an outer shell and an inner bracket arranged in the outer shell; An upper cover assembly, one side of which is rotatably connected to the box body assembly; A button assembly, which is arranged on the box body assembly and is used to buckle the upper cover assembly away from the rotating side onto the box body assembly or unlock the upper cover assembly, and comprises: A cover opening buckle, the cover opening buckle is embedded in the inner bracket and is slidably connected to the inner bracket; A button, which is arranged inside the outer shell and corresponds to the cover opening buckle; A spring is disposed between the cover-opening buckle and the inner bracket and applies elastic force to the cover-opening buckle so that the cover-opening buckle abuts against the button.

2. A small printer according to claim 1, characterized in that: The inner bracket side wall has a mounting groove, and the upper end surface is provided with a second through hole connected with the mounting groove, the cover opening buckle is arranged in the mounting groove, and the spring is arranged in the mounting groove and is located between the cover opening buckle and the mounting groove.

3. A small printer according to claim 1, characterized in that: A first rotating part rotatably connected to the inner bracket is arranged below the upper cover assembly, and a first hook cooperating with the cover opening buckle is arranged below the end away from the box body assembly rotatably connected, and a first hook groove cooperating with the first hook is arranged above the cover opening buckle.

4. A small printer according to claim 3, characterized in that: The first rotating part is rotatably connected to the inner bracket through the first rotating shaft; the first rotating part and the first hook are both arranged on the lower end surface of the upper cover assembly, and the first hook is matched with the first hook groove after passing through the second through hole.

5. A small printer according to claim 1, characterized in that: First buckles are arranged on both sides of the cover opening buckle, and first limiting grooves cooperating with the first buckles are arranged on the inner side wall of the installation groove. The first buckle cooperates with the first limiting groove to prevent the cover opening buckle from being pushed out of the installation groove by the spring.

6. A small printer according to claim 1, characterized in that: The outer shell is provided with a first through hole in which a button is embedded and used for pressing the button. The button comprises a first pressing portion embedded in the first through hole and a second supporting arm disposed on both sides of the first pressing portion and located inside the outer shell.

7. A small printer according to claim 1, characterized in that: A second groove is also arranged at the bottom of the back side of the outer shell, a third groove is arranged at the bottom of the second groove, a magnetic attraction component is arranged in the third groove, and a decorative sheet is arranged in the third groove to cover the magnetic attraction component.

8. A small printer according to claim 7, characterized in that: The magnetic attraction member adopts a non-circular and ring-shaped structure, the second groove is an annular groove, and the decorative sheet is a metal piece.

9. A small printer according to claim 7, characterized in that: The magnetic attraction component includes a bottom plate and N magnet blocks arranged on the bottom plate, wherein the value N≥1.

10. A small printer according to claim 1, characterized in that: It also includes a circuit board arranged below the inner bracket and between the inner bracket and the outer shell, two charging electrodes electrically connected to the circuit board and arranged side by side below the circuit board, and a storage battery electrically connected to the circuit board.

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