Seal printer

Abstract

A seal printer is provided, which performs printing by driving a nozzle to rotate through a motor in a printer shell, reduces a number of parts in the printer and a volume of the printer is similar to a volume of a traditional seal. The printer is realized to substitute for the traditional seal; meanwhile, a coaxial connection device is arranged in the printer, a structure thereof is simple and has a certain tolerance for an error of the coaxiality, so that the printer is simple to install, and is firm and durable.

Claims

1. A seal printer comprising a shell, a battery positioned inside the shell, a motor, a printing fixing assembly and a printing rotating assembly, wherein: the printing fixing assembly is a portion of a printer assembly fixed or stationary relative to the shell; the printing rotating assembly is a portion of the printer assembly rotated relative to the shell, the motor comprises an upper portion and a lower portion, the upper portion is a stationary portion which is stationary relative to the shell, and the lower portion is a rotated portion which rotates relative to the shell; the printing fixing assembly is fixedly connected with the stationary portion as the upper portion of the motor, and the printing rotating assembly is fixedly connected with the rotated portion as the lower portion of the motor and is driven by the rotated portion to rotate; the printing rotating assembly comprises an ink cartridge and a printing nozzle fixedly connected to a bottom of the ink cartridge.

2. The seal printer of claim 1, wherein the printing fixing assembly comprises a motor fixing frame, main control board support posts and a main control circuit board; the motor fixing frame is fixedly connected with the shell through threaded portions at lower ends of the main control board support posts; the main control circuit board is positioned above the motor fixing frame and is supported and fixed by upper ends of the main control board support posts; the motor fixing frame is fixedly connected with the stationary portion of the motor; the printing rotating assembly comprises a middle shaft, an ink cartridge fixing frame and the ink cartridge; the middle shaft is fixedly connected on its top with the rotated portion of the motor and on its bottom with the ink cartridge fixing frame, which is fixedly connected therein with the ink cartridge and drives the ink cartridge to rotate, and the printing nozzle is fixedly connected to the bottom of the ink cartridge.

3. The seal printer of claim 1, wherein an electric connection ring is concentrically arranged in the motor.

4. The seal printer of claim 2, wherein the electric connection ring comprises an electric connection ring housing and an electric connection ring core positioned in the electric connection ring housing, which are electrically connected to each other through brushes, the electric connection ring housing is coaxially and fixedly mounted in the rotated portion of the motor and is driven by the rotated portion of the motor to rotate synchronously with a rotation of the rotated portion, the electric connection ring core is electrically connected to one end of a wire which extends upwards and is connected with the main control circuit board at its another end, the electric connection ring housing is electrically connected to one end of a wire which extends downwards and is connected with a driving control board at its another end.

5. The seal printer of claim 2, wherein a coaxial connection device is arranged between the rotated portion of the motor and the top of the middle shaft.

6. The seal printer of claim 4, wherein the coaxial connection device comprises a circular main piece and a circular negative piece, the circular main piece is fixedly connected with a lower end of the rotated portion of the motor and is formed into a disc with a plurality of protruding cylinders; the circular negative piece is fixedly connected with the top of the middle shaft and is formed with a plurality of elongated grooves at positions corresponding to protruding cylinders, the grooves have widths equal to or slightly larger than diameters of the respective protruding cylinders, and are formed into the elongated grooves extending by a distance along a radial direction with a circle center same as a circle center of the negative piece.

7. The seal printer of claim 2, wherein the middle shaft is cylindrical and integrally molded with the ink cartridge fixing frame.

8. The seal printer of claim 2, wherein the middle shaft is provided at an outside thereof with a bearing supported by a bearing seat fixed to the shell.

9. The seal printer of claim 7, wherein the shell is provided with a first protruding portion and a second protruding portion which both protrude inwards; the threaded portions at lower end of the main control board support posts are screwed into threaded holes in the first protruding portion; the bearing seat is fixed to the shell by screwing bolts into threaded holes arranged in the second protruding portion.

10. The seal printer of claim 2, wherein the main control board support post is provided in top end thereof with recessed threaded hole groove, the main control circuit board is fixed to the top ends of the main control board support posts by screwing bolts into the recessed threaded hole grooves.

11. The seal printer of claim 2, wherein the motor fixing frame is provided with a groove for recieving the motor.

12. The seal printer of claim 2, wherein the ink cartridge fixing frame is provided with a plurality of catching slots along a periphery thereof, which are engaged with hooks at corresponding positions of the ink cartridge.

13. The seal printer of claim 2, wherein the ink cartridge is a cylindrical.

14. The seal printer of claim 2, wherein the main control circuit board is not in contact with the motor fixing frame.

15. The seal printer of claim 2, wherein the shell has a top cover, on which is fixed with a fingerprint module.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an assembly view of a handheld printer of the present disclosure.

(2) FIG. 2 is a schematic view of a motor and an electrical connection ring installed therein of the present disclosure.

(3) FIG. 3 is a bottom view of a coaxial connection device of the present disclosure in an assembled state.

(4) FIG. 4 is a side view of the coaxial connection device of the present disclosure in the assembled state.

(5) FIG. 5 is a schematic view of a structure of an ink cartridge support of the present disclosure.

(6) FIG. 6 is a bottom view of a structure of a motor fixing frame of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(7) In order to make objects, technical solutions and advantages of the present disclosure more apparent, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments obtained by person skilled in the art based on the embodiments of the present disclosure without inventive labors shall fall within the protection scope of the present disclosure.

(8) FIG. 1 is an assembly view of a handheld printer of the present disclosure, wherein the printer has a shell 17, an openable top cover 2 is mounted on a top of the shell 17, a fingerprint module 1 is mounted on the top cover 2 at a substantially central position thereof so as to correspond to a position of a thumb when one's hand holding the printer, to capture a fingerprint. The battery 3 is mounted in such a way that after the top cover is opened, the battery 3 therein can be seen, so as to be convenient to be taken out and replaced, and to supply power for a main control circuit board 4.

(9) A motor fixing frame 5 is arranged below the battery, and is integrally shaped as a π pattern. The motor fixing frame 5 is mounted, at an edge thereof, on a first protruding portion 20 protruding from the shell towards an inner side, through four support legs of the motor fixing frames, and is fixed by screwing screw rods formed at main control panel support posts 6 into respective threaded holes of the first protruding portion 20.

(10) The main control board support posts 6 are provided in their upper ends with recessed threaded hole grooves 18. The main control circuit board 4 is supported by the upper ends of the four main control board support posts 6, and is fixed by screwing bolts into the recessed threaded hole grooves 18. At this time, the main control circuit board 4 is supported by the upper ends of the four main control board support posts 6 to form a suspended state, and the main control circuit board 4 is separated from the motor fixing frame 5 therebelow by a distance.

(11) FIG. 6 is a bottom view of the motor fixing frame 5 of the present disclosure and a middle portion of the motor fixing frame forms a cylindrical receiving groove for a motor 7, which just receives the cylindrical motor 7 therein. The motor fixing frame 5 and a top of the motor 7 are fixedly connected with each other by thread.

(12) FIG. 2 is an assembly view of the motor and an electrical connection ring installed therein of the present disclosure, wherein the motor includes an upper stationary portion 24 and a lower rotating portion 27, and the stationary portion is stationary with respect to the shell 17 due to a connection between the stationary portion and the motor fixing frame 5. The rotated portion 27 is arranged below the motor 7 and the electric connection ring 8 is fixedly arranged in the rotated portion in a manner of interference fit, bonding or the like. The electric connection ring comprises a housing 26 and an electric connection ring core 25 positioned inside the housing 26, which are contacted with each other and mutually supported, and can rotate relative to each other by means of internal bearings or the like. Meanwhile, the housing 26 and the electric connection ring core 25 can be electrically connected with each other by means of an electric brush or the like. Furthermore, the electric connection ring core 25 is connected to one end of a wire which extends upward and is connected with the main control circuit board 4 at another end, and the housing 26 is connected to one end of a wire which extends downward and is connected with a driving control board 13 at another end. The above-mentioned configuration of the electrical connection ring finally achieves a stable electrical connection between the stationary main control circuit board 4 and the rotated driving control board 13.

(13) A circular main piece 9 of a coaxial connection device is connected to a bottom of the motor rotated portion 27 through a bolt 19, the circular main piece matches and is connected with the circular negative piece 10, as shown in FIGS. 3 and 4. The circular main piece is provided with a plurality of cylinders protruding from a side surface of the circular main piece. The cylinders are inserted into elongated grooves at corresponding positions of the circular negative piece 10 as shown in FIG. 3. The elongated grooves extend by a distance along a radial direction of the round negative film 10 and each has groove width which is equal to or slightly larger than a diameter of the core cylinder on the circular main piece 9. As shown in FIG. 3, the coaxial connection device composed of the circular main piece 9 and the circular negative piece 10 has a certain tolerance for an error of a coaxiality for rotated bodies mounted to top and bottom thereof. That is, when an error occurs in the coaxiality of the rotated portion 27 of the motor 7 and the central shaft 14 , a normal force transmission process from the motor 7 to the middle shaft 14 is still able to be achieved so as to ensure a normal operation of the device.

(14) The middle shaft 14 is a internal hollow cylindrical component. A top end of the middle shaft is closed, and is fixedly connected with the circular negative piece 10 of the coaxial connection device through bolts 19. The middle shaft 14 can be integrally molded with an ink cartridge fixing frame 15 located below the middle shaft 14.

(15) The middle shaft 14 is provided on an outside thereof with a bearing 11 for enabling the middle shaft to be rotated, and the bearing 11 is provided on an outside with a bearing seat 12 for supporting the bearing, wherein the bearing seat 12 is fixedly mounted on a second protruding portion 22 protruding inwards from the shell 17 through bolts 21.

(16) The ink cartridge fixing frame 15 has a structure as shown in FIG. 5, is formed with an receiving cavity therein for receiving an ink cartridge 16, and has catching slots disposed on side plates of the ink cartridge fixing frame, and the catching slots cooperate with hooks located at corresponding positions of the ink cartridge 16 to lock. The ink cartridge 16 is integrally provided on its bottom with a nozzle 23, on which a plurality of ink jetting holes arranged in a matrix form are disposed, and when the nozzle rotates along with the ink cartridge 16, through the ink jetting holes arranged in a matrix form, ink is ejected according to a certain algorithm so as to print seal patterns of circle or other shapes.

(17) The structure of the printer of the present disclosure is described in detail above, and the operation thereof is described below.

(18) When the printer is used, the fingerprint module 1 is touched by a finger, that is, a command for starting printing is sent to the printer, the main control circuit board 4 is powered by the battery 3 and electrically connected with the driving control board 3 to control the process of the nozzle 23 ejecting the ink.; the main control circuit board is simultaneously electrically connected with the motor 7 to control a rotation speed of the upper rotated portion 27 of the motor 7; the main control circuit board 7 controls the nozzle 23 to print seals of different contents by matching the rotation speed of the rotated portion 27 with a timing for ejecting the ink and a time period for ejecting the ink in the nozzle 23.

(19) The above is a further detailed description of the present disclosure in combination with specific preferred embodiments. It cannot be considered that the present disclosure be limited to these embodiments. Those skilled in the art can make some simple deductions or replacements without departing from the spirit of the disclosure, and such amendments should be construed as falling within the scope of the disclosure defined by the appended claims.