Portable printer

Abstract

The utility model provides a portable printer, comprising a box body assembly, the box body assembly comprises an outer shell and an inner support arranged in the outer shell; the circuit board is arranged below the inner support and located between the inner support and the outer shell, and a charging interface electrically connected with the circuit board is formed in the circuit board; a second supporting step is arranged on the inner support, and a first clamping position for avoiding the charging interface is arranged on the second supporting step; according to the portable printer, the second supporting step is arranged on the inner support, and the first clamping position arranged on the second supporting step can position or limit the charging connector, so that when a charging wire is plugged, external force which enables the charging interface to deviate towards two sides can be prevented from being applied, and even if the portable printer is used for a long time, the charging interface cannot be damaged. Offset of the charging interface can be prevented, and the service life of the printer is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of printer, in particular to a portable printer. BACKGROUND

[0002] The thermal label printer does not use carbon tape as printing medium, and directly produces reaction on thermal printing paper through heating to complete printing task of image or text etc. It has been widely applied in POS terminal system, bank system, medical instrument, logistics system etc.

[0003] The label printer mainly comprises: an upper cover or an upper cover assembly or a flip cover, a box body, a circuit board and a key structure. The upper cover can rotate relative to the box body, and the key structure can control the opening and closing of the label printer. The key structure is located on the box body, and a user can open or close the upper cover of the label printer through the key. However, the current label printer may have the following shortcomings:

[0004] Firstly, the charging interface is mostly directly fixed and installed on the circuit board, and when the charging wire is frequently plugged for charging, it is easy to cause the charging interface to deviate and other problems, and the service life is reduced.

[0005] Secondly, the key structure is relatively complex, which leads to relatively inconvenient installation.

[0006] Therefore, the utility model person specially designs a portable printer, and the case is generated. UTILITY MODEL CONTENTS

[0007] The utility model aims at solving one of the technical problems in the prior art. To this end, the utility model provides a portable printer, which is characterized by that a second support step is arranged on the inner support, and a first clamping position arranged on the second support step can position or limit the charging connector. When the charging wire is plugged, external force that deviates the charging interface to both sides can be avoided, and even if used for a long time, the charging interface can also be prevented from deviating, thereby overcoming the shortcomings caused by directly arranging the charging interface on the circuit board.

[0008] According to the portable printer, the charging connector is arranged on the circuit board, and the second support step is arranged on the inner support, so that the first clamping position arranged on the second support step can position or limit the charging connector. When the charging wire is plugged, external force that deviates the charging interface to both sides can be avoided, and even if used for a long time, the charging interface can also be prevented from deviating, thereby overcoming the shortcomings caused by directly arranging the charging interface on the circuit board.

[0009] Further comprising a circuit board arranged below the inner support and between the inner support and the outer shell, and a charging interface electrically connected with the circuit board is arranged on the circuit board.

[0010] A second support step is arranged on the inner support, and a first clamping position that avoids the charging interface is arranged on the second support step.

[0011] The portable printer has the effects that the first clamping position arranged on the second supporting step on the inner support can position or limit the charging connector, when the charging wire is plugged in, external force for offsetting the charging interface to both sides can be avoided, even if the printer is used for a long time, the charging interface can be prevented from being offset, and the service life of the printer is improved.

[0012] In some embodiments of the present application, the printer further comprises:

[0013] The upper cover assembly is rotatably connected to the box body assembly on one side;

[0014] The key assembly is arranged on the box body assembly and used for buckling or unlocking the upper cover assembly away from the rotating side of the box body assembly, and comprises:

[0015] The cover buckle is embedded on the inner support and slidably connected to the inner support;

[0016] The button is arranged on the inner side of the shell and corresponds to the cover buckle;

[0017] The spring is arranged between the cover buckle and the inner support and applies elastic force to the cover buckle so that the cover buckle abuts against the button.

[0018] In some embodiments of the present application, the inner support side wall mounting groove, and the upper end surface is provided with a second through hole communicated with the mounting groove, the cover buckle is arranged in the mounting groove, the spring is arranged in the mounting groove and located between the cover buckle and the mounting groove.

[0019] In some embodiments of the present application, the bottom and / or both sides of the mounting groove are provided with support strips.

[0020] In some embodiments of the present application, the upper cover assembly is provided below with a first rotating part rotatably connected to the inner support, and the lower end away from the rotating connection end of the box body assembly is provided with a first clamping hook matched with the cover buckle, and the cover buckle is provided above with a first hook groove matched with the first clamping hook.

[0021] In some embodiments of the present application, the first rotating part is rotatably connected to the inner support through a first rotating shaft; the first rotating part and the first clamping hook are both arranged on the lower end surface of the upper cover assembly, and the first clamping hook passes through the second through hole and matches with the first hook groove.

[0022] In some embodiments of the present application, the cover buckle is provided with a first clamping buckle on both sides, and the inner wall of the mounting groove is provided with a first limiting groove matched with the first clamping buckle, so that the first clamping buckle and the first limiting groove are matched to prevent the cover buckle from being pushed out of the mounting groove by the spring.

[0023] In some embodiments of the utility model, the cover buckle is further provided with a positioning groove for embedding one end of the spring.

[0024] In some embodiments of the utility model, the outer shell is provided with a first through hole for embedding a button and pressing the button, the button comprises a first pressing part embedded in the first through hole, and second supporting arms are arranged on both sides of the first pressing part and inside the outer shell.

[0025] In some embodiments of the utility model, the back bottom of the outer shell is further provided with a second groove, the bottom of the second groove is provided with a third groove, a magnetic member is arranged in the third groove, and a decorative sheet is arranged in the third groove to cover the magnetic member.

[0026] In some embodiments of the utility model, the magnetic member adopts a non-integer circular and annular structure, and the second groove is an annular groove.

[0027] In some embodiments of the utility model, the magnetic member comprises a bottom plate and N magnetic blocks arranged on the bottom plate, wherein N≥1.

[0028] In some embodiments of the utility model, the decorative sheet adopts a metal member.

[0029] In some embodiments of the utility model, the utility model further comprises two charging electrodes arranged side by side below the circuit board and electrically connected with the circuit board, and a storage battery electrically connected with the circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model. The illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0031] Among them:

[0032] Figure 1 It is a structure schematic view of the portable printer of the utility model;

[0033] Figure 2 It is an exploded view of the portable printer of the utility model;

[0034] Figure 3 It is a partial enlarged view of the utility model Figure 2 ;

[0035] Figure 4 It is a partial enlarged view of the upper cover assembly of the utility model;

[0036] Figure 5 It is a partial enlarged view of the portable printer of the utility modelFigure 1

[0037] Figure 6 is the structure diagram of the cap opening buckle of the utility model Figure 1

[0038] Figure 7 is the structure diagram of the cap opening buckle of the utility model Figure 2

[0039] Figure 8 is the partial enlargement of the portable printer of the utility model Figure 2

[0040] Figure 9 is the partial enlargement of the utility model Figure 7

[0041] Figure 10 is the partial enlargement of the portable printer of the utility model Figure 3

[0042] Figure 11 is the structure diagram of the magnetic member of the utility model

[0043] Figure 12 is the partial explosion view of the portable printer of the utility model

[0044] Figure 13 is the structure diagram of the outer shell of the utility model

[0045] Figure 14 is the partial enlargement of the utility model Figure 13

[0046] Figure 15 is the internal schematic view of the portable printer of the utility model

[0047] Label explanation:

[0048] ​​​​​​​10, box body assembly; 11, outer shell; 111, first through hole; 112, first support step; 1121, first clamping groove; 113, second groove; 114, third groove; 115, mounting hole; 1151, second limiting groove; 1152, third through hole; 12, inner support; 121, mounting groove; 122, second through hole; 123, first limiting groove; 124, support strip; 125, paper bin; 126, clamping groove; 127, second support step; 1271, first clamping position; 128, connecting column; 20, upper cover assembly; 21, first rotating part; 22, first clamping hook; 221, first inclined surface; 23, first rotating shaft; 30, key assembly; 31, cover buckle; 311, first hook groove; 312, first clamping buckle; 3121, first support arm; 3122, first clamping part; 313, first groove; 314, first protruding part; 315, avoiding position; 316, positioning groove; 32, button; 321, first pressing part; 322, first limiting part; 323, second support arm; 33, spring; 40, magnetic attraction part; 41, bottom plate; 42, magnet block; 401, notch; 50, decorative sheet; 60, circuit board; 61, charging electrode; 62, battery; 63, second sensing sheet; 64, charging interface; 70, paper roll; 71, first sensing sheet. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer and more understandable, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0050] Please refer to Figures 1 to 15 It is a portable printer as the best embodiment of the utility model, which comprises a box body assembly, the box body assembly 10 comprises an outer shell 11 and an inner support 12 arranged in the outer shell 11, further comprises a circuit board 60 arranged below the inner support 12 and between the inner support 12 and the outer shell 11, the charging interface 64 electrically connected with the circuit board 60 is arranged on the circuit board 60, the second support step 127 is arranged on the inner support 12, the first clamping position 1271 avoiding the charging interface 64 is arranged on the second support step 127, the avoiding hole corresponding to the charging interface 64 is arranged on the outer shell 11, and the connector of the charging wire is connected with the charging interface 64 through the avoiding hole to realize charging. The portable printer of the utility model sets the second support step 127 on the inner support 12, and the first clamping position 1271 arranged on the second support step 127 can position or limit the charging 64, when the charging wire is plugged in, the external force offsetting the charging interface 64 to both sides can be avoided, even if used for a long time, the charging interface 64 can also be prevented from being offset, and the service life of the printer is improved.

[0051] The printer further comprises a cover assembly 20 rotatably connected to the box assembly 10 on one side, and a button assembly 30 arranged on the box assembly 10 and used for buckling the cover assembly 20 on the box assembly 10 away from the rotating side or unlocking the cover assembly 20. The button assembly 30 comprises a cover buckle 31, a button 32 and a spring 33. The cover buckle 31 is embedded on the inner support 12 and is in sliding connection with the inner support 12. The button 32 is arranged on the inner side of the outer shell 11 and corresponds to the cover buckle 31. The spring 33 is arranged between the cover buckle 31 and the inner support 12 and exerts a spring force on the cover buckle 31 so that the cover buckle 31 abuts against the button 32. The cover buckle 31 is made of plastic and is integrally formed by plastic material. The portable printer of the utility model is provided with the mounting groove 121 on the inner support 12 of the box assembly 10, and the cover buckle 31 of the button structure can be directly installed in the mounting groove 121, so that the cover buckle 31 is conveniently and quickly installed.

[0052] For details, please refer to Figure 3 , 4 , the side wall of the inner support 12 is provided with the mounting groove 121, and the upper end surface is provided with the second through hole 122 in communication with the mounting groove 121. The cover buckle 31 is arranged in the mounting groove 121, and the spring 33 is arranged in the mounting groove 121 and located between the cover buckle 31 and the mounting groove 121.

[0053] For details, please refer to Figure 3 , 4 , the bottom and / or both sides of the mounting groove 121 are provided with the support strip 124. That is, one or two support strips 124 can be arranged at the bottom of the mounting groove 121, or one support strip 124 can be arranged at each side of the mounting groove 121. One or two support strips 124 can also be arranged at the bottom, and one support strip 124 can also be arranged at each side. By arranging a plurality of support strips 124, the contact area between the cover buckle 31 and the two sides and / or the bottom of the mounting groove 121 is reduced, the friction is reduced, and the movement of the cover buckle 31 is smoother. The long side of the support strip 124 is parallel to the moving direction of the cover buckle 31, and the support strip 124 is directly integrally injection molded during the molding of the cover buckle 31.

[0054] For details, please refer to Figure 2The first rotating part 21 is arranged below the upper cover assembly 20 and is rotatably connected with the inner support 12, and the lower end away from the end rotatably connected with the box body assembly 10 is provided with a first clamping hook 22 matched with the cover opening buckle 31. The upper end of the cover opening buckle 31 is provided with a first hook groove 311 matched with the first clamping hook 22. The first clamping hook 22 is hooked on the first hook groove 1121 to realize the closing of the upper cover assembly 20. The first clamping hook 22 is separated from the first hook groove 1121 to realize the opening of the upper cover assembly 20. The first rotating part 21 is rotatably connected with the inner support 12 through a first rotating shaft 23. The first rotating part 21 and the first clamping hook 22 are arranged on the lower end surface of the upper cover assembly 20. The first clamping hook 22 passes through the second through hole 122 and is matched with the first hook groove 311.

[0055] For details, please refer to Figure 5 、 6 The first recess 313 is arranged on the upper end surface of the cover opening buckle 31. Only one side wall of the four side walls of the first recess 313 is communicated with the outer side wall of the cover opening buckle 31 and forms an opening. The inner side of the first recess 313 away from the opening is provided with a first protruding part 314. The protruding direction of the first protruding part 314 is towards the opening. The first hook groove 311 for hooking the first clamping hook 22 is formed between the lower end of the first protruding part 314 and the first recess 313. The upper end of the first protruding part 314 is provided with a first inclined surface 221 or a first chamfer to facilitate the cooperation between the second inclined surface or the second chamfer on the first clamping hook 22 and the first inclined surface 221 / first chamfer when the upper cover assembly 20 is closed, that is, the cover opening buckle 31 is further pushed into the mounting groove 121 and is further compressed by the spring 33. When reaching a certain position, the second inclined surface / second chamfer passes over the first inclined surface 221 / first chamfer. The cover opening buckle 31 is reset under the action of the spring 33. The first hook groove 311 hooks the first clamping hook 22 to realize the buckling.

[0056] For details, please refer to Figure 5 、 6The first clamping buckle 312 is provided on the two sides of the cover opening buckle 31, the first limiting groove 123 is provided on the inner side wall of the mounting groove 121 and matched with the first clamping buckle 312, and the first clamping buckle 312 and the first limiting groove 123 are matched to prevent the cover opening buckle 31 from being pushed out of the mounting groove 121 by the spring 33. The first clamping buckle 312 comprises a first supporting arm 3121 provided on the side wall of the cover opening buckle 31 and a first clamping portion 3122 provided at the end of the first supporting arm 3121 and outward. The cover opening buckle 31 is provided with an avoiding position 315 on the two sides, and the first clamping buckle 312 is located in the avoiding position 315. The cover opening buckle 31 is made of plastic material and is injection molded, so that the first supporting arm 3121 has a certain elasticity, and a third inclined surface / third chamfer is provided on the outer side of the first clamping portion 3122, so that the first clamping buckle 312 is buckled into the first limiting groove 123, so that the cover opening buckle 31 is limited in the mounting groove 121 by the cooperation of the first clamping buckle 312 and the first limiting groove 123, and is elastically outward under the action of the spring 33, so that the first hook 22 hooks the first hook groove 311, the upper cover assembly 20 is covered on the inner support 12, the cover opening buckle 31 is manually pressed down, the spring 33 is further compressed, and the cover opening buckle 31 is further moved into the mounting groove 121, the first hook 22 is separated from the first hook groove 311, and the upper cover assembly 20 can be opened. The cover opening buckle 31 is further provided with a positioning groove 316 for embedding one end of the spring 33. Specifically, the positioning groove 316 is located on the back 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 side wall of the mounting groove 121.

[0057] For details, 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 second support arms 323 provided on both sides of the first pressing portion 321 and located inside the outer shell 11. The button 32 in the present invention can 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 provided on the outer edge of the pressing portion and located inside the outer shell 11, and second support arms 323 provided on both sides of the first limiting portion 322 and located inside the outer shell 11. The first limiting portion 322 is ring-shaped 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 through 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 avoid the button 32 from shifting when installing the inner bracket 12, 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 to greatly improve the convenience and efficiency of installation.

[0058] When the cam 31 is in the unlock state, the first latch 312 is engaged with the first stopper 313 and the second stopper 314 is engaged with the first stopper 316. When the cam 31 is unlocked, the first latch 31 is engaged with the first stopper 313 and the second stopper 314 is engaged with the first stopper 316.

[0059] Please refer to the following for details: Figure 10, the bottom of the back of the shell body 11 is further provided with a second groove 113, the bottom of the second groove 113 is provided with a third groove 114, the third groove 114 is provided with a magnetic member 40, and the third groove 114 is provided with a decorative sheet 50 for covering the magnetic member 40. That is, the back of the printer is provided with the magnetic member 40, and in the printing process, the printer with the magnetic member 40 is magnetically attracted to the back of the mobile phone, so that the printer does not need to be held by one hand, and the whole printing process is more smooth and fast. If the mobile phone cannot be magnetically attracted, a metal sheet can be used. Most existing mobile phones have a shell, and the metal sheet can be placed in the shell and closely attached to the back of the mobile phone. Alternatively, the metal sheet can be provided with an adhesive, and the adhesive can be attached to the back of the mobile phone or the handheld terminal.

[0060] For details, please refer to Figure 10 、 11 The magnetic member 40 adopts a non-integer circular and annular structure, that is, a notch 401 is arranged on the annular structure; the shape of the third groove 114 is consistent with the shape of the magnetic member; the second groove 113 is an annular groove, and the decorative sheet 50 adopts a metal member. The magnetic member 40 is embedded in the third groove 114, and then the decorative sheet 50 is embedded in the second groove 113. The end surface of the installed decorative sheet 50 is flush with the end surface of the bottom of the shell body 11, and the whole is more beautiful. The magnetic member 40 of the utility model can also be directly placed in the third groove 114, and the magnetic member 40 is at least one and is provided with glue or double-sided adhesive tape at the bottom of the third groove 114. The magnetic member 40 can be directly laid in the third groove 114. Another structure of the magnetic member 40 in the utility model is that the magnetic member 40 comprises a bottom plate 41 and N magnetic blocks 42 arranged on the bottom plate 41, wherein the value of N is greater than or equal to 1. Specifically, when a plurality of magnetic blocks 42 are arranged, the plurality of magnetic blocks 42 are arranged in a circumferential array as much as possible to cover the whole bottom plate 41. The bottom plate 41 is directly adhered to the bottom of the third groove 114 by glue or double-sided adhesive tape, and the magnetic blocks 42 are also adhered to the bottom plate 41 by glue or double-sided adhesive tape.

[0061] For details, please refer to Figure 2 、 12The portable printer further comprises two charging electrodes 61 which are electrically connected with the circuit board 60 and are arranged below the circuit board 60 in parallel, a battery 62 which is electrically connected with the circuit board 60. The two charging electrodes 61 are abutted against the bottom of the inner housing 11 below, and can be charged in cooperation with the magnetic suction head. The inner side wall of the inner housing 11 is further provided with a charging interface 64 which is electrically connected with the circuit board 60, and the inner support 12 is provided with a second supporting step 127 which is used for abutting against the circuit board 60, and the second supporting step 127 is provided with a first clamping position 1271 which is used for avoiding the charging interface 64, and the first clamping position 1271 on the second supporting step 127 can better limit the charging interface 64 on the circuit board 60, and meanwhile, the connecting firmness of the charging interface 64 is improved. The charging interface 64 is located above the circuit board 60, and the charging electrode 61 is arranged below the circuit board 60. The circuit board 60 is further electrically connected with the battery 62, the two charging electrodes 61 arranged in the utility model can charge the battery 62, and the battery 62 can also be charged by using the charging interface 64, the battery 62 can be charged by using two charging modes, and the adaptability of the printer is greatly improved.

[0062] For details, please refer to Figure 13 、 14 , 15, the bottom of the inner housing 11 is provided with a mounting hole 115 which is used for embedding the charging electrode 61 and is in communication with the inside of the inner housing 11. The mounting hole 115 comprises a second limiting groove 1151 which is located at the bottom of the inner side of the inner housing 11 and is used for embedding the charging electrode 61, and a third through hole 1152 which is arranged at the bottom of the second limiting groove 1151 and is in communication with the inside and outside of the inner housing 11, the inner diameter of the third through hole 1152 is smaller than the inner diameter of the second limiting groove 1151, and the third through hole 1152 facilitates the communication of the charging device and the two charging electrodes 61 to charge the battery 62, and since the second limiting groove 1151 is arranged in cooperation with the first clamping position 1271 on the second supporting step 127, when the inner support 12 is locked and fixed, the charging electrode 61 can be well limited in the second limiting groove 1151 and is firmly installed.

[0063] For details, please refer to Figure 12The inner support 12 is provided with a paper warehouse 125 for placing a paper roll 70, a first induction sheet 71 is arranged on the side wall of the paper roll 70, a second induction sheet 63 for inducting the first induction sheet 71 is arranged on the circuit board 60 and corresponds to the bottom of the paper warehouse 125, the second induction sheet 63 is electrically connected with the circuit board 60, and the circuit board 60 is located between the outer shell 11 and the inner support 12. The first induction sheet 71 can be used for storing information of the paper roll 70, and the second induction sheet 63 inductes the first induction sheet 71, wherein the first induction sheet 71 adopts an NFC radio frequency device with an NFC chip, specifically, a printer with NFC can read information from a medium such as a label or a sticker with an NFC chip, or write data into the medium, when the device is close to the NFC radio frequency device, the NFC radio frequency device sends a signal, the printer receives the signal and performs verification and processing, and finally completes data transmission or related operations. For details, please refer to Figure 3 The outer side of the paper warehouse 125 of the inner support 12 is further provided with a clamping groove 126 for embedding the second induction sheet 63, so that the second induction sheet 63 is better limited.

[0064] For details, please refer to Figure 3 The inner support 12 is provided with a plurality of connecting columns 128 for mounting the circuit board 60, and the circuit board 60 is fixed on the connecting columns 128 through a plurality of first screws. Specifically, the connecting columns 128 are provided with first internal screw holes, and the first screws are screwed through the circuit board 60 and the connecting columns 128. The inner support 12 is locked on the outer shell 11 through a plurality of second screws. During installation, the circuit board 60 is first locked below the inner support 12 through the first screws, and then the inner support 12 is locked on the outer shell 11 through the second screws.

[0065] In summary, the portable printer of the utility model can position or limit the charging connector through the first clamping position arranged on the second support step of the inner support, when the charging wire is inserted, the external force applied to the charging interface can be avoided to deviate to both sides, even if used for a long time, the charging interface can also be prevented from deviating, the service life of the printer is improved, the mounting groove is arranged on the inner support of the box body, the opening buckle and the elastic member can be directly mounted into the mounting groove, the spring provides the elastic force to the opening buckle, and the first clamping buckle and the first limiting groove are matched and limited, so that the opening buckle is conveniently and quickly mounted, and the magnetic attraction member is further arranged, so that the portable printer is convenient to use.

[0066] The utility model has been described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various non-essential improvements are adopted by using the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, all of which are within the protection scope of the utility model.

Claims

1. A portable printer characterized by comprising: The cartridge assembly comprises an outer shell and an inner support arranged in the outer shell; The circuit board is arranged below the inner support and between the inner support and the outer shell, and a charging interface is arranged on the circuit board and electrically connected to the circuit board; A second support step is arranged on the inner support, and a first clamping position is arranged on the second support step to avoid the charging interface.

2. A portable printer according to claim 1, wherein The printer further comprises: An upper cover assembly rotatably connected to one side of the cartridge assembly; A key assembly arranged on the cartridge assembly and used to lock or unlock the upper cover assembly, which comprises: A cover unlocking buckle arranged on the inner support and slidably connected to the inner support; A button arranged on the inner side of the outer shell and corresponding to the cover unlocking buckle; A spring arranged between the cover unlocking buckle and the inner support and applying a spring force to the cover unlocking buckle so that the cover unlocking buckle abuts against the button.

3. A portable printer according to claim 2, wherein The inner support side wall is provided with a mounting groove, and the upper end face is provided with a second through hole communicating with the mounting groove, the cover unlocking buckle is arranged in the mounting groove, and the spring is arranged in the mounting groove and between the cover unlocking buckle and the mounting groove.

4. A portable printer according to claim 3, wherein The upper cover assembly is rotatably connected to the inner support at a lower end, and a first clamping hook corresponding to the cover unlocking buckle is arranged at an end away from the cartridge assembly, the cover unlocking buckle is provided with a first hook groove corresponding to the first clamping hook.

5. The portable printer of claim 3, wherein, First clamping buckles are arranged on both sides of the cover unlocking buckle, and first limiting grooves corresponding to the first clamping buckles are arranged on the inner side wall of the mounting groove, so that the first clamping buckles and the first limiting grooves are matched to prevent the cover unlocking buckle from being pushed out of the mounting groove by the spring.

6. The portable printer of claim 1, wherein, The outer shell is provided with a first through hole in which the button is embedded and used to press the button, and the button comprises a first pressing part embedded in the first through hole and second support arms arranged on both sides of the first pressing part and inside the outer shell.

7. The portable printer of claim 1, wherein, The back surface of the outer shell is further provided with a second recess, and the bottom of the second recess is provided with a third recess, the third recess is provided with a magnetic member, and the third recess is provided with a decorative sheet for covering the magnetic member.

8. A portable printer according to claim 7, wherein, The magnetic member adopts a non-integer circular and annular structure, the second recess is an annular recess, and the decorative sheet adopts a metal member.

9. The portable printer of claim 7, wherein, The magnetic member comprises a bottom plate and N magnetic blocks arranged on the bottom plate, wherein N≥1.

10. The portable printer of claim 1, wherein, The printer further comprises two charging electrodes arranged below the circuit board and electrically connected to the circuit board, and a storage battery electrically connected to the circuit board.

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