A portable stamp printer

Abstract

The application relates to the technical field of printers, in particular to a portable seal printer which comprises a shell, a rotor, a printing rotating assembly and a stator; the printing rotating assembly comprises a nozzle, and the nozzle rotates with the rotor; the outside of the rotor is provided with the stator, and the stator is fixedly connected with the shell. The ink box is integrated into the inside of the rotor, the rotor drives the printing rotating assembly to rotate by the motor rotation principle, and finally drives the nozzle to rotate, so that the rotating ink jet printing is realized. The application reduces the internal parts of the printer, further compresses the equipment space, and makes the equipment more miniaturized and convenient to carry.

Description

Technical Field

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

[0002] Official seals are used by legal entities to handle internal and external affairs. Only documents affixed with official seals are legally binding. Traditionally, printed bills, receipts, documents, and medical test reports are often manually stamped one by one, a labor-intensive and inefficient process. Therefore, existing seal printers have been developed, but they are bulky and difficult to carry.

[0003] For example, Chinese invention patent CN110254048B discloses a new type of seal printer. Printing is performed by rotating a nozzle driven by a motor inside the printer housing. This reduces the number of printer parts and reduces the size of the printer to a size similar to that of a traditional seal, effectively replacing it. A coaxial connection device is also provided inside the printer. This device is simple in structure and has a certain tolerance for coaxial deviation, making the printer easy to install and durable. However, this solution cannot be made more compact without reducing the necessary structure. Reducing the size of the seal printer to make it portable has become a pressing technical issue in this field.

[0004] Therefore, a kind of portable seal printer is in need of badly. Summary of the Invention

[0005] In order to avoid the above problems existing in the prior art, the object of the present invention is to provide a portable seal printer.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a portable stamp printer, comprising a housing, a rotor, a printing rotating assembly and a stator; the printing rotating assembly comprises a nozzle, and the nozzle rotates with the rotor; the stator is provided on the outside of the rotor, and the stator is fixedly connected to the housing.

[0007] The present invention is further configured such that the printing rotary assembly further includes an ink cartridge, the nozzle is connected to the bottom of the ink cartridge, and the ink cartridge is arranged inside the rotor.

[0008] The present invention is further configured such that the printing rotary assembly further comprises an ink cartridge holder, one end of the ink cartridge holder is provided with a mounting platform for the ink cartridge holder, and the other end is provided with a snap groove; the mounting platform is connected to the rotor;

[0009] The outer wall of the ink cartridge is provided with a buckle that cooperates with the buckle groove, and the ink cartridge is fixedly connected to the ink cartridge holder through the buckle. That is, the rotor drives the ink cartridge holder to rotate, and then drives the ink cartridge in the ink cartridge holder to rotate.

[0010] The present invention is further configured such that the stator is a circular ring structure, a protruding stator winding is provided inside the stator, and a bearing group is provided between the stator and the rotor inside.

[0011] The present invention is further configured such that the bearing group includes a first bearing group and a second bearing group; the first bearing group and the second bearing group form an upper and lower structure arranged on the stator winding.

[0012] The present invention is further configured such that the first bearing group includes a first bearing group outer ring and a first bearing group inner ring; the first bearing group inner ring is arranged inside the first bearing group outer ring, and the first bearing group outer ring and the first bearing group inner ring are arranged between the stator and the rotor;

[0013] The second bearing group includes a second bearing group outer ring and a second bearing group inner ring; the second bearing group inner ring is arranged inside the second bearing group outer ring, and the second bearing group outer ring and the second bearing group inner ring are arranged between the stator and the rotor.

[0014] The bearing assembly can be arranged between the stator and the rotor by means of interference fit, clearance fit or fitting.

[0015] The cooperation between the first bearing group and the second bearing group makes the rotation between the stator and the rotor smoother, and the two bearing groups can also fix the rotor.

[0016] The present invention is further configured such that the portable stamp printer further comprises a power supply assembly, a top cover, a support frame and a main control circuit board; the support frame and the power supply assembly are arranged inside the housing; the top cover is mounted on the upper end of the housing;

[0017] The main control circuit board is connected to the support frame through screw holes, and the main control circuit board is arranged between the top cover and the support frame.

[0018] The present invention is further configured such that the portable stamp printer further includes a drive control board, and the drive control board is installed between the support frame and the rotor.

[0019] The present invention is further configured such that the power supply component is a battery or an external power supply.

[0020] The present invention is further configured such that the portable stamp printer further comprises a circuit slip ring; the circuit slip ring comprises an outer slip ring and an inner slip ring; the outer wall of the outer slip ring is provided with a protruding outer ring connecting platform, the outer ring connecting platform is detachably connected to the support frame; the inner slip ring is provided with an inner ring connecting platform, the inner ring connecting platform is detachably connected to the rotor, and the inner slip ring extends into the interior of the outer slip ring; the outer slip ring and the inner slip ring are electrically connected via brushes;

[0021] The outer ring of the slip ring is electrically connected to the power supply component and the main control circuit board through wires; the inner ring of the slip ring is electrically connected to the drive control board through wires.

[0022] The line slip ring is set to achieve electrical connection and signal transmission between the printing rotating component and the static mechanism such as the shell.

[0023] The present invention is further configured such that an ink replenishing assembly is also provided in the portable stamp printer, and the ink replenishing assembly is provided on the ink cartridge fixing frame or the rotor; the ink replenishing assembly includes a sealing cover, a main body and a puncture needle, the main body is a tubular structure with a hollow interior, the sealing cover is provided at the first end of the main body, and is used to seal the first end of the main body; the second end of the main body is provided with a puncture needle, and an ink inlet for plugging the puncture needle is provided on the ink cartridge, and the puncture needle is inserted into the ink inlet.

[0024] The present invention is further configured such that the portable stamp printer also includes a top cover connecting piece, the top cover connecting piece includes a placement groove and a top cover connecting platform protruding from the placement groove, the power supply assembly is arranged in the placement groove; the top cover connecting platform is detachably connected to the top cover; the sealing cover is abutted against the top cover or the top cover connecting piece.

[0025] A plurality of threaded holes are provided at the bottom of the placement slot, and the top cover connector is connected to the threaded pillars through the threaded holes on the placement slot and is installed on the support frame; the placement slot is supported by a plurality of threaded pillars and suspended inside the shell and is spaced a certain distance from the support frame.

[0026] The detachable connection is a conventional detachable connection method such as a snap connection, a threaded connection or an adhesive connection.

[0027] The present invention is further configured such that, in some cases, the nozzle may be provided with a nozzle connection platform, and the nozzle is directly and detachably connected to the rotor via the nozzle connection platform.

[0028] The present invention is further configured such that the ink replenishing assembly includes a sealing cover and a main body, the interior of the main body is hollow, the sealing cover is arranged at the first end of the main body, and is used to seal the first end of the main body; at the same time, the sealing cover abuts against the top cover, and the second end of the main body is connected to the nozzle through a pipeline.

[0029] The present invention is further configured such that the portable stamp printer also includes a top cover connecting piece, which includes a placement slot, a replenishing component slot and a top cover connecting platform protruding from the placement slot; the top cover connecting platform is detachably connected to the top cover, and the ink replenishing component is arranged in the replenishing component slot.

[0030] The housing is provided with a touch screen, and a biometric identification module may be provided in the touch screen; the touch screen is electrically connected to the main control circuit board.

[0031] When using the printer, remove the protective cover, enter the password on the touch screen or scan the QR code to log in to your personal account, or log in through the biometric module on the touch screen. After logging in, use the mobile terminal or directly operate on the touch screen to send a print command to the printer. The main control circuit board controls the rotation of the print rotary component and sends a print command to the drive control board. The rotation of the print rotary component drives the nozzle to rotate, and the drive control board controls the nozzle to spray ink.

[0032] In summary, the beneficial effects of the above technical solution of the present invention are as follows:

[0033] 1. The present invention integrates the ink cartridge and the nozzle into the rotor, and uses the principle of motor rotation to directly drive the nozzle to rotate, thereby realizing rotary inkjet printing; it reduces the internal components of the printer, further compresses the equipment space, and makes the equipment more miniaturized.

[0034] 2. The present invention is provided with an ink refilling assembly, and the ink cartridge can be refilled by removing the top cover without disassembling the ink cartridge, thereby reducing the frequency of disassembly of the ink cartridge and increasing the service life of the ink cartridge.

[0035] 3. The present invention can be used without a power cord connection or directly connected to a power cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a cross-sectional view of the overall structure of Example 1 of the present invention.

[0038] Figure 2 This is an exploded view of the overall structure of Example 1 of the present invention.

[0039] Figure 3 This is a cross-sectional view of the fixed part structure of Example 1 of the present invention.

[0040] Figure 4 This is a cross-sectional view of the rotating part structure of Example 1 of the present invention.

[0041] Figure 5 This is a schematic diagram of the ink cartridge described in Example 1 of the present invention.

[0042] Figure 6 This is a cross-sectional view of the overall structure of Example 3 of the present invention.

[0043] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0044] 1. Touch screen, 2. Top cover, 3. Power supply assembly, 4. Top cover connector, 4-1. Threaded support, 4-2. Placement slot, 4-3. Supplementary component slot, 5. Main control circuit board, 6. Housing, 7. Line slip ring, 7-1. Slip ring outer ring, 7-2. Slip ring inner ring, 7-21. Inner ring connecting platform, 8. Drive control board, 9. Cartridge holder, 9-1. Mounting platform, 9-2. Buckle slot, 10. First bearing group, 10-1. First bearing outer ring of the first bearing group, 10-2, inner ring of the first bearing group, 11, rotor, 12, stator, 13, second bearing group, 13-1, outer ring of the second bearing group, 13-2, inner ring of the second bearing group, 14, ink cartridge, 14-1, diaphragm, 14-2, buckle, 14-3, ink-absorbing cotton, 14-4, nozzle, 14-5, nozzle connecting platform, 15, protective cover, 16, puncture needle, 17, sealing cover, 18, support frame, 19, ink replenishing assembly. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, other similar embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of protection of the present invention.

[0046] In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0047] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0048] Example:

[0049] like Figure 1-5 As shown, a preferred embodiment of the present invention is a portable stamp printer, comprising a housing 6, a top cover 2, a rotor 11, a printing rotary assembly and a stator 12; the printing rotary assembly comprises an ink cartridge 14 and a nozzle 14-4; the ink cartridge 14 is arranged inside the rotor 11, and the ink cartridge 14 rotates with the rotor 14; the ink cartridge 14 is connected to the nozzle 14-4; the stator 12 is provided on the outside of the rotor 11, and the upper end face of the stator 12 is connected to the lower end face of the housing 6; the top cover 2 is installed on the upper end of the housing 6.

[0050] The printing rotary assembly also includes an ink cartridge holder 9, one end of which is provided with a mounting platform 9-1 protruding from the ink cartridge holder 9, and the other end is provided with a snap groove 9-2; the mounting platform is connected to the rotor 11; conventional connection methods such as screw thread connection or bonding can be used.

[0051] The outer wall of the ink cartridge 14 is provided with a buckle 14-2 that cooperates with the buckle groove 9-2, and the ink cartridge 14 is fixed to the inside of the ink cartridge holder 9 through the buckle 14-2. That is, the rotor 11 drives the ink cartridge holder 9 to rotate, and then drives the ink cartridge 14 in the ink cartridge holder 9 to rotate.

[0052] An ink-absorbing cotton 14 - 3 is provided inside the ink cartridge, an ink inlet is provided on the top of the ink cartridge, and a diaphragm 14 - 1 is provided at the ink inlet.

[0053] If desired, an ink refill assembly 19 may also be provided on the ink cartridge holder 9. The ink refill assembly 19 comprises a sealing cap 17, a main body, and a puncture needle 16. The main body is a hollow tubular structure. The sealing cap 17 is provided at the first end of the main body to seal the first end of the main body. The sealing cap 17 abuts against the top cover 2 or the top cover connector 4. The puncture needle 16 is provided at the second end of the main body. The ink cartridge 14 is provided with an ink inlet for receiving the puncture needle 16, and the puncture needle 16 is inserted into the ink inlet.

[0054] The ink cartridge 14 is mounted on the ink cartridge holder 9 and connected via a snap 14-2, making assembly and disassembly easy. Once the ink cartridge 14 is in place, the puncture needle 16 can penetrate the septum 14-1, connecting the internal passage of the ink cartridge holder 9 with the interior of the ink cartridge 14. To refill the ink, the sealing cap 17 is opened and the ink is injected. The ink then flows directly to the ink blotting pad 14-3, completing the refill of the ink cartridge 14 and avoiding frequent ink changes. In this embodiment, the ink refill assembly 19 is integrally formed with the ink cartridge holder 9. This integral structure provides a more stable connection between the ink refill assembly 19 and the ink cartridge 14.

[0055] The stator 12 is an annular structure with a protruding stator winding disposed within it. A first bearing group 10 and a second bearing group 13 are disposed between the stator 12 and the rotor 11 within it. The first bearing group 10 is disposed above the stator winding, while the second bearing group 13 is disposed below the stator winding. The first bearing group 10 comprises a first bearing group outer ring 10-1 and a first bearing group inner ring 10-2. The first bearing group inner ring 10-2 is disposed within the first bearing group outer ring 10-1, and the first bearing group outer ring 10-1 and the first bearing group inner ring 10-2 are interference-fitted between the stator 12 and the rotor 11.

[0056] The second bearing group 13 includes a second bearing group outer ring 13-1 and a second bearing group inner ring 13-2; the second bearing group inner ring 13-2 is arranged inside the second bearing group outer ring 13-1, and the second bearing group outer ring 13-1 and the second bearing group inner ring 13-2 are interference fit between the stator 12 and the rotor 11.

[0057] The portable stamp printer also includes a power supply component 3, a top cover connector 4, a support frame 18, a drive control board 8 and a main control circuit board 5; the support frame 18 is arranged inside the shell 6; the top cover connector 4 includes a placement slot 4-2 and a top cover connection platform protruding from the placement slot 4-2, and the power supply component 3 is arranged in the placement slot 4-2; the top cover connection platform is detachably connected to the top cover 2; the detachable connection is a conventional detachable connection method such as snap connection, screw and screw hole connection or bonding.

[0058] There are multiple threaded holes at the bottom of the placement slot 4-2, and the top cover connector 4 is connected to the threaded pillar 4-1 through the threaded holes on the placement slot 4-2 and is installed on the support frame 18; the placement slot 4-2 is supported by multiple threaded pillars 4-1 and suspended inside the outer shell 6, maintaining a certain distance from the support frame 18.

[0059] The main control circuit board 5 is connected to the support frame 18 through screw holes, and the main control circuit board 5 is arranged between the top cover connector 4 and the support frame 18. In this embodiment, the drive control board 8 is arranged above the ink cartridge fixing frame 9 through screw holes.

[0060] The power supply component 3 is a battery or an external power supply. If it is an external power supply, the housing 6 must also be provided with an external interface for connecting to the external power supply.

[0061] The portable stamp printer further comprises a circuit slip ring 7; the circuit slip ring 7 comprises an outer slip ring 7-1 and an inner slip ring 7-2; the outer wall of the outer slip ring 7-1 is provided with a protruding outer ring connecting platform 7-11, and the outer ring connecting platform 7-11 is connected to the support frame 18 via screw holes; the inner slip ring 7-2 is provided with an inner ring connecting platform 7-21, and the inner ring connecting platform 7-21 is connected to the ink cartridge fixing frame 9 via screw holes, and the inner slip ring 7-2 extends into the interior of the outer slip ring 7-1; the outer slip ring 7-1 and the inner slip ring 7-2 are electrically connected via brushes;

[0062] The outer slip ring 7-1 is electrically connected to the power supply assembly 3 and the main control circuit board 5 via wires, while the inner slip ring 7-2 is electrically connected to the drive control board 8 via wires. The line slip ring 7 enables electrical connection and signal transmission between the rotating printing assembly and stationary components such as the housing 6.

[0063] A protective cover 15 may be provided at the bottom of the portable stamp printer to protect the ink cartridge inside and moisturize the nozzle at the bottom of the ink cartridge. The protective cover 15 and the bottom of the stator 12 may be connected in a conventional detachable manner such as snap connection, threaded connection or bonding.

[0064] The top cover 2 is provided with a touch screen 1 , in which a biometric identification module is provided; the touch screen 1 is electrically connected to the main control circuit board 5 .

[0065] When in use, remove the protective cover 15, enter the password on the touch screen 1 or scan the QR code to log in to the personal account, or log in through the biometric module on the touch screen 1. After logging in, use the mobile terminal or directly operate on the touch screen to send a print instruction to the printer. The main control circuit board 5 controls the rotation of the print rotating component and sends a print instruction to the drive control board 8. The rotation of the print rotating component drives the ink cartridge 14 to rotate, and the drive control board 8 controls the nozzle 14-4 to spray ink.

[0066] Example 2:

[0067] A portable stamp printer. The difference between this embodiment and embodiment 1 is that the diameter of the shell 6 in this embodiment is increased and extends downward to wrap around the stator 12. The lower end of the shell 6 is connected to the outer wall of the stator 12 by threads or clamping.

[0068] Example 3:

[0069] like Figure 6As shown, a portable stamp printer is shown. The difference between this embodiment and Example 1 is that in this embodiment, the nozzle 14-4 is provided with a nozzle connecting platform 14-5, and the nozzle 14-4 is directly and detachably connected to the rotor 11 through the nozzle connecting platform 14-5, and the drive control board 8 is arranged above the rotor 11 (not shown in the figure).

[0070] The ink replenishing assembly 19 includes a sealing cover 17 and a main body. The main body is hollow inside, and the sealing cover 17 is arranged at the first end of the main body to seal the first end of the main body; at the same time, the sealing cover 17 abuts against the top cover 2, and the second end of the main body is connected to the nozzle 14-4 through a pipeline.

[0071] The portable stamp printer also includes a top cover connector 4, which includes a placement slot 4-2, a replenishing component slot 4-3 and a top cover connection platform protruding from the placement slot 4-2; the top cover connection platform is detachably connected to the top cover 2, the ink replenishing component 19 is arranged in the replenishing component slot 4-3, and the placement slot 4-2 is used to place the power supply component 3.

[0072] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A portable seal printer, characterized in that: The printing device comprises a housing, a rotor, a printing rotary assembly and a stator; the printing rotary assembly comprises a nozzle, and the nozzle rotates with the rotor; the stator is provided on the outside of the rotor, and the stator is fixedly connected to the housing; The printing rotary assembly further includes an ink cartridge, the nozzle is connected to the bottom of the ink cartridge, and the ink cartridge is disposed inside the rotor; The printing rotary assembly further includes an ink cartridge holder, one end of which is provided with a mounting platform for the ink cartridge holder, and the other end of which is provided with a snap-fit ​​slot; the mounting platform is connected to the rotor; The outer wall of the ink cartridge is provided with a buckle that cooperates with the buckle groove, and the ink cartridge is fixedly connected to the ink cartridge fixing frame through the buckle; The portable stamp printer is also provided with an ink replenishing assembly, which is arranged on the ink cartridge holder or the rotor; the ink replenishing assembly includes a sealing cover, a main body and a puncture needle, the main body is a tubular structure with a hollow interior, the sealing cover is arranged at the first end of the main body, and is used to seal the first end of the main body; the second end of the main body is provided with a puncture needle, and an ink inlet for inserting the puncture needle is provided on the ink cartridge, and the puncture needle is inserted into the ink inlet.

2. The portable stamp printer according to claim 1, characterized in that: The stator is a circular ring structure, and a protruding stator winding is provided inside the stator; a bearing group is provided between the stator and the rotor inside.

3. The portable stamp printer according to claim 2, characterized in that: The bearing group includes a first bearing group and a second bearing group; the first bearing group and the second bearing group form an upper and lower structure arranged on the stator winding.

4. The portable stamp printer according to claim 3, characterized in that: The first bearing group includes a first bearing group outer ring and a first bearing group inner ring; the first bearing group inner ring is arranged inside the first bearing group outer ring, and the first bearing group outer ring and the first bearing group inner ring are arranged between the stator and the rotor; The second bearing group includes a second bearing group outer ring and a second bearing group inner ring; the second bearing group inner ring is arranged inside the second bearing group outer ring, and the second bearing group outer ring and the second bearing group inner ring are arranged between the stator and the rotor.

5. The portable stamp printer according to claim 4, characterized in that: The portable seal printer further comprises a power supply assembly, a top cover, a support frame and a main control circuit board; the support frame and the power supply assembly are arranged inside the shell; the top cover is mounted on the upper end of the shell; The main control circuit board is connected to the support frame through screw holes, and the main control circuit board is arranged between the top cover and the support frame.

6. The portable stamp printer according to claim 5, characterized in that: The portable stamp printer further includes a drive control board installed between the support frame and the rotor.

7. The portable stamp printer according to claim 5, characterized in that: The power supply component is a battery or an external power supply.

8. The portable stamp printer according to claim 6, characterized in that: The portable stamp printer further comprises a circuit slip ring; the circuit slip ring comprises an outer slip ring and an inner slip ring; the outer wall of the outer slip ring is provided with a protruding outer ring connecting platform, and the outer ring connecting platform is detachably connected to the support frame; the inner slip ring is provided with an inner ring connecting platform, and the inner ring connecting platform is detachably connected to the rotor, and the inner slip ring extends into the interior of the outer slip ring; the outer slip ring and the inner slip ring are electrically connected via brushes; The outer ring of the slip ring is electrically connected to the power supply component and the main control circuit board through wires; the inner ring of the slip ring is electrically connected to the drive control board through wires.

9. The portable stamp printer according to claim 1, characterized in that: The portable stamp printer also includes a top cover connector, which includes a placement groove and a top cover connection platform protruding from the placement groove; the top cover connection platform is detachably connected to the top cover; and the sealing cover abuts against the top cover or the top cover connector.

10. The portable stamp printer according to claim 1, characterized in that: The portable stamp printer further comprises a protective cover which is detachably connected to the bottom of the stator.

11. A portable seal printer, characterized in that: The printing device comprises a housing, a rotor, a printing rotary assembly and a stator; the printing rotary assembly comprises a nozzle, and the nozzle rotates with the rotor; the stator is provided on the outside of the rotor, and the stator is fixedly connected to the housing; The nozzle is provided with a nozzle connecting platform, and the nozzle is detachably connected to the rotor through the nozzle connecting platform; the portable stamp printer is also provided with an ink replenishing component and a top cover connecting piece, and the ink replenishing component includes a sealing cover and a main body, the interior of the main body is hollow, and the sealing cover is provided at the first end of the main body for sealing the first end of the main body; at the same time, the sealing cover abuts against the top cover, and the second end of the main body is connected to the nozzle through a pipeline.

12. The portable stamp printer according to claim 11, characterized in that: The stator is a circular ring structure, and a protruding stator winding is provided inside the stator; a bearing group is provided between the stator and the rotor inside.

13. The portable stamp printer according to claim 12, characterized in that: The bearing group includes a first bearing group and a second bearing group; the first bearing group and the second bearing group form an upper and lower structure arranged on the stator winding.

14. The portable stamp printer according to claim 13, characterized in that: The first bearing group includes a first bearing group outer ring and a first bearing group inner ring; the first bearing group inner ring is arranged inside the first bearing group outer ring, and the first bearing group outer ring and the first bearing group inner ring are arranged between the stator and the rotor; The second bearing group includes a second bearing group outer ring and a second bearing group inner ring; the second bearing group inner ring is arranged inside the second bearing group outer ring, and the second bearing group outer ring and the second bearing group inner ring are arranged between the stator and the rotor.

15. The portable stamp printer according to claim 14, characterized in that: The portable seal printer further comprises a power supply assembly, a top cover, a support frame and a main control circuit board; the support frame and the power supply assembly are arranged inside the shell; the top cover is mounted on the upper end of the shell; The main control circuit board is connected to the support frame through screw holes, and the main control circuit board is arranged between the top cover and the support frame.

16. The portable stamp printer according to claim 15, characterized in that: The portable stamp printer further includes a drive control board installed between the support frame and the rotor.

17. The portable stamp printer according to claim 15, characterized in that: The power supply component is a battery or an external power supply.

18. The portable stamp printer according to claim 16, characterized in that: The portable stamp printer further comprises a circuit slip ring; the circuit slip ring comprises an outer slip ring and an inner slip ring; the outer wall of the outer slip ring is provided with a protruding outer ring connecting platform, and the outer ring connecting platform is detachably connected to the support frame; the inner slip ring is provided with an inner ring connecting platform, and the inner ring connecting platform is detachably connected to the rotor, and the inner slip ring extends into the interior of the outer slip ring; the outer slip ring and the inner slip ring are electrically connected via brushes; The outer ring of the slip ring is electrically connected to the power supply component and the main control circuit board through wires; the inner ring of the slip ring is electrically connected to the drive control board through wires.

19. The portable stamp printer according to claim 11, characterized in that: The portable stamp printer also includes a top cover connecting piece, which includes a placement slot, a replenishing component slot and a top cover connecting platform protruding from the placement slot; the top cover connecting platform is detachably connected to the top cover, and the ink replenishing component is arranged in the replenishing component slot.

20. The portable stamp printer according to claim 11, characterized in that: The portable stamp printer further comprises a protective cover which is detachably connected to the bottom of the stator.

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