Portable handheld ink-jet printing mechanism

Abstract

The invention discloses a portable handheld ink-jet printing mechanism which comprises a middle shell, a sealing ink scraping assembly arranged at the front end of the middle shell, a machine core assembly arranged in the middle of the middle shell and a lower cover assembly arranged below the middle shell. The invention discloses a portable handheld ink-jet printing mechanism which comprises a carriage unit driving mechanism, a paper feeding driving mechanism and a carriage unit assembly, a sealing ink scraping assembly comprises a guide support, a connecting rod, a reset tension spring, an ink scraping support, a sealing support and sealing rubber arranged on the sealing support, and the portable handheld ink-jet printing mechanism is small in size, convenient to operate, low in printing cost, good in printing quality and high in practicability. And the requirements of consumers on instant photo printing are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printers, in particular to a portable handheld inkjet printer. BACKGROUND

[0002] At present, in the field of portable photo printers, the existing products include instant photo developing mode, thermal sublimation type, and special photo paper (ZINK) type, which have the common defects of high printing cost, general printing quality except for thermal sublimation, and the problem of easy photo fading. At present, the main way of photo printing is still inkjet printing, but it is not easy to make inkjet printers small and portable. Therefore, a new type of photo printer needs to be developed to make up for the blank of inkjet printers in the portable photo printing industry and realize instant photo printing. SUMMARY

[0003] The technical problem solved by the present application is to provide a portable handheld inkjet printer, which can realize the conversion of the printing channel and the ink scraping sealing space in a limited space by moving the lead screw driven character car assembly left and right to contact and impact the two reset rods on the sealing ink scraping assembly, thereby saving space and making the machine small enough to meet the customer's miniaturization demand, easy to operate, low printing cost, good inkjet printing quality, not easy to fade, and meet the consumer's demand for instant photo printing.

[0004] To solve the above technical problems, the present application adopts one technical scheme: a portable handheld inkjet printer is provided, which comprises a middle shell, a sealing ink scraping assembly arranged at the front end of the middle shell, a core assembly arranged in the middle of the middle shell, and a lower cover assembly arranged below the middle shell, the core assembly is used for pressing and holding the sealing ink scraping assembly, and comprises a character car driving mechanism, a paper feeding driving mechanism, and a character car assembly, the sealing ink scraping assembly comprises a guide bracket, a connecting rod, a reset tension spring, an ink scraping bracket, a sealing bracket, and a sealing rubber arranged on the sealing bracket, the ink scraping bracket is slidably arranged in a first sliding groove on the left side of the guide bracket, the sealing bracket is slidably arranged in a second sliding groove on the right side of the guide bracket, the first sliding groove has a limiting protrusion, one end of the connecting rod is connected with the bottom of the ink scraping bracket, and the other end is connected with the sealing bracket, one end of the reset tension spring is connected with the guide bracket, and the other end is connected with the end of the connecting rod close to the sealing bracket, the ink scraping bracket has a first reset rod, the sealing bracket has a second reset rod, and the character car assembly is provided with an ink cartridge, and is horizontally reciprocated under the driving of the character car driving mechanism. The word car driving mechanism comprises a word car motor, a first gear, a screw rod and a screw rod gear arranged on one end of the screw rod, the screw rod gear is engaged with the first gear, the first gear is engaged with the power output end of the word car motor, an ink cartridge is mounted on the word car assembly and connected with the screw rod, and the word car assembly moves horizontally and reciprocally under the driving of the word car motor; When the word car assembly moves to the rightmost side and contacts with the second reset rod, the ink scraping support is clamped by the limiting protrusion in the first sliding groove and is limited in the top platform, at this time, the sealing rubber on the sealing support presses the nozzle on the ink cartridge, and the word car assembly is in a sealed state; when the word car assembly moves to the left until contacting with the first reset rod, the sealing support slides out of the second sliding groove and separates from the nozzle on the ink cartridge, the ink scraping support slides out of the top platform in the first sliding groove under the driving of the word car motor, and moves to the leftmost side under the action of the reset tension spring, at this time, the paper feeding channel is opened.

[0005] In a preferred embodiment of the present application, a scraping piece is clamped on the ink scraping support, square grooves are arranged on the side edges of the scraping piece, and oil absorption sponges are arranged in the square grooves; when the word car assembly moves to the left, the scraping piece contacts with the nozzle on the ink cartridge to scrape off the excess ink.

[0006] In a preferred embodiment of the present application, the first sliding groove and the second sliding groove are sliding groove structures with uphill structures, and the limiting protrusion is integrally formed on the inner wall of the top platform of the first sliding groove.

[0007] In a preferred embodiment of the present application, one end of the connecting rod has a round hole, the other end has a waist-shaped hole, one end of the round hole is connected to the bottom of the ink scraping support through a screw, and the other end of the waist-shaped hole is sleeved on the positioning column of the sealing support.

[0008] In a preferred embodiment of the present application, the word car driving mechanism further comprises a left support, a right support, an upper angle iron and a word car guide shaft, the left support and the right support are connected together through the upper angle iron, the word car assembly is mounted between the left support and the right support through the word car guide shaft, one end of the screw rod is rotationally connected with the right support, the other end is mounted with the screw rod gear, the word car assembly is connected with the screw rod and moves horizontally and reciprocally along the word car guide shaft under the driving of the word car motor, and a word car reset sensor is arranged on the left support.

[0009] In a preferred embodiment of the present application, the word car assembly comprises a word car support, a spring plate rubber arranged in the word car support and a print head soft plate arranged on the spring plate rubber, the upper end of the word car support is connected with the screw rod, and the lower end is connected with the word car guide shaft.

[0010] In a preferred embodiment of the present application, the front end surface of the carriage support is provided with elastic hooks matched with the hanging hooks on the ink cartridge, and the rear end of the carriage support is provided with clamping positions.

[0011] In a preferred embodiment of the present application, the paper feeding driving mechanism comprises a paper feeding motor, a paper feeding roller, a paper feeding roller gear, a second gear, a third gear, a first reduction gear, a second reduction gear and a third reduction gear, the paper feeding roller is rotatably arranged on the upper angle iron and is provided with the paper feeding roller gear, the paper feeding roller gear is engaged with the second gear, the second gear is engaged with the first reduction gear, the first reduction gear is engaged with the second reduction gear, the second reduction gear is engaged with the third reduction gear, the third gear is arranged on the power output end of the paper feeding motor, and the third reduction gear is engaged with the third gear.

[0012] In a preferred embodiment of the present application, the lower cover assembly comprises a lower cover, a compression spring and a pressing plate, the lower cover is connected with the middle shell through a sliding groove and can slide on the middle shell, the pressing plate is movably connected with the rear end of the lower cover, and the compression spring is arranged between the lower cover and the pressing plate and lifts the front end of the pressing plate.

[0013] In a preferred embodiment of the present application, a main board and a battery are further arranged in the middle shell, the main board is arranged at the rear end of the middle shell and is connected with the middle shell through screws, and the battery is adhered to the middle shell through foam.

[0014] The present application has the following advantages: (1) Without using other power, the screw drives the carriage assembly to move left and right to contact and hit the two reset rods of the sealing and ink scraping assembly, so as to complete the conversion of the printing channel and the ink scraping sealing space in a limited space, which can make the printing mechanism very compact, save space and make the machine small enough to meet the customer's miniaturization requirement. (2) The screw design meets the printing precision and space requirement, the innovative sealing and ink scraping sealing assembly maximizes the use of space, and the narrow space meets the functional requirements of printing, flash printing, ink scraping and sealing. (3) The operation is convenient, the printing cost is low, the inkjet printing quality is good and not easy to fade, and the demand of consumers for instant printing photos is met. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Figure 1This is a schematic diagram of the overall structure of a portable handheld inkjet printing mechanism of the present invention; Figure 2 This is a schematic diagram of a portable handheld inkjet printing mechanism of the present invention when feeding paper and printing; Figure 3 This is a schematic structural diagram of a movement assembly in a specific embodiment of the present invention; Figure 4 This is a structural diagram of a carriage assembly in a specific embodiment of the present invention; Figure 5 2 is a schematic structural diagram of a sealed ink scraping assembly in a specific embodiment of the present invention; Figure 6 1 is a side view of a sealed ink scraping assembly according to a specific embodiment of the present invention; Figure 7 It is a bottom view of the sealed ink scraping assembly in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1 and Figures 5-7 An embodiment of the present invention discloses a portable handheld inkjet printing mechanism, comprising: a middle shell 1, a sealing scraper assembly 2 disposed at the front end of the middle shell, a core assembly 3 disposed in the middle of the middle shell, and a lower cover assembly 4 disposed below the middle shell. The sealing scraper assembly is mounted at the front end of the middle shell, and the core assembly is mounted in the middle of the middle shell to press the sealing scraper assembly and is fixed to the middle shell with screws. The core assembly includes: a carriage drive mechanism, a paper feed drive mechanism, and a carriage assembly. The carriage drive mechanism drives the carriage assembly to move left and right to contact and collide with first and second reset rods on the sealing scraper assembly. The paper feed motor in the paper feed drive mechanism drives multiple sets of gears to transmit power to the paper feed roller. Driven by the paper feed motor, the printing paper 8 is fed from the paper bin into the printing area, ensuring paper feed accuracy.

[0018] Specifically, the sealing and scraping assembly includes a guide bracket 201, a connecting rod 207, a first line positioning sensor 208, a reset tension spring 209, a scraping bracket 204, a sealing bracket 202, and a sealing rubber 203 mounted on the sealing bracket, both of which are rigidly connected. A first sliding groove 2011 and a second sliding groove (not shown in the figure) with uphill structures are respectively arranged on the left and right sides of the guide bracket. The scraping bracket is slidably arranged in the first sliding groove on the left side of the guide bracket through sliding wheels 2012 on both sides. The sealing bracket is also slidably arranged in the second sliding groove on the right side of the guide bracket through sliding wheels. The first sliding groove has a limiting protrusion 2013 integrally formed on the inner wall of the top platform. One end of the connecting rod has a round hole, and the other end has a waist-shaped hole 2071. One end of the round hole is connected to the bottom of the scraping bracket by a screw, and the other end of the waist-shaped hole is sleeved on a positioning column 2021 of the sealing bracket. One end of the reset tension spring is connected to the guide bracket, and the other end is connected to the end of the connecting rod close to the sealing bracket. The reset tension spring can help the sealing bracket reset to the leftmost side.

[0019] Specifically, the scraping bracket has a first reset rod 2041, and the sealing bracket has a second reset rod 2022. An ink cartridge 7 is mounted on the carriage assembly, and moves horizontally back and forth under the drive of the carriage drive mechanism. When the carriage assembly moves to the rightmost side and contacts the second reset rod, the scraping bracket is blocked by the limiting protrusion in the first sliding groove and cannot be pulled to the left by the reset tension spring. At this time, the sealing rubber on the sealing bracket presses the nozzle on the ink cartridge, and the carriage assembly is in a sealed state. When the carriage assembly starts to flash and print in the sealed state, the carriage assembly starts to move to the left from the sealed position on the right side. The sealing bracket slides out of the second sliding groove and separates from the nozzle on the ink cartridge under the action of gravity. The sealing bracket relatively slides in the waist-shaped hole of the connecting rod and is not easy to scratch the nozzle of the ink cartridge. When the carriage assembly moves to the left until it contacts the first reset rod, the scraping bracket climbs out of the top platform of the first sliding groove through the limiting protrusion and moves to the leftmost side under the action of the reset tension spring, opening the paper path. The movement of the carriage assembly realizes left and right impact, thereby completing the conversion of the printing path and the scraping and sealing space in a limited space, so that the machine can be small enough to meet the customer's miniaturization needs.

[0020] Further, the scraping bracket has a scraping piece 205 clamped thereon, which is made of soft material and can scrape off the residual ink on the nozzle. The scraping bracket has a square groove on the side of the scraping piece, and an oil absorption sponge 206 is attached in the square groove. When the carriage assembly moves to the left, the nozzle moves to the left and does not spray the first reset rod of the scraping bracket. The nozzle flashes and wipes the scraping piece to remove excess ink.

[0021] As Figures 3-4As shown, the carriage driving mechanism comprises a left support 301, a right support 302, an upper angle iron 303, a carriage guide shaft 304, a lead screw 305, a lead screw gear 306, a first gear 307, and a carriage motor 308. The left and right supports are connected together through the upper angle iron. The carriage assembly is installed between the left and right supports through the carriage guide shaft. The ends of the lead screw are supported by a shaft sleeve. The left side head is fixedly installed with the lead screw gear. The lead screw gear is engaged with the first gear. The first gear is engaged with the power output end of the carriage motor. The carriage assembly is connected with the lead screw and moves horizontally along the carriage guide shaft under the drive of the carriage motor. The use of the lead screw in the small-sized printer makes the transmission mechanism simple and efficient. The design of the lead screw meets the requirements of the printer precision and space, and particularly saves the volume, so that the printer can be small enough to meet the customer's small-sized requirement and be convenient to carry.

[0022] Further, the carriage assembly comprises a carriage support 309, a spring plate rubber 310 arranged in the carriage support, and a print head soft plate 311 arranged on the spring plate rubber. The spring plate rubber is used to lift the print head soft plate so that the contacts on the soft plate are in contact with the circuit contacts of the ink cartridge. In addition, the front end surface of the carriage support is provided with an elastic hook 321 matched with the hook on the ink cartridge. The rear end of the carriage support is provided with a clamping position 322. The ink cartridge can be installed on the carriage support through the clamping position and the elastic hook, so that the installation and taking of the ink cartridge can be completed in a small space. The upper end of the carriage support is connected with the lead screw, and the lower end is connected with the carriage guide shaft. The lead screw drives the carriage support to move, which is simple and efficient and particularly saves the volume. The straight-line printing ensures the printing effect and printing rate, and makes the inkjet printer portable and handheld to meet the customer's requirement.

[0023] Further, the paper feed driving mechanism comprises a paper feed motor 312, a paper feed roller 313, a paper feed roller gear 314, a second gear 315, a third gear 316, a first speed reduction gear 317, a second speed reduction gear 318, and a third speed reduction gear 319. The paper feed roller is rotatably arranged on the upper angle iron and is installed with the paper feed roller gear. The paper feed roller gear is engaged with the second gear. The second gear is engaged with the first speed reduction gear. The first speed reduction gear is engaged with the second speed reduction gear. The second speed reduction gear is engaged with the third speed reduction gear. The third gear is arranged on the power output end of the paper feed motor. The third speed reduction gear is engaged with the third gear. The paper feed motor drives multiple gears to transmit power to the paper feed roller, so that the paper is fed from the paper bin to the printing area under the drive of the paper feed motor.

[0024] As shown in the drawings, Figure 2The lower cover assembly includes a lower cover 41, a compression spring 42 and a pressing plate 43, the lower cover is connected with the middle shell through a sliding slot and can slide on the middle shell, the pressing plate is movably connected with the rear end of the lower cover, the compression spring is arranged between the lower cover and the pressing plate and lifts the front end of the pressing plate, under the action of the compression spring, the pressing plate lifts the photo paper to the surface of the paper feed roller, in addition, the application also includes a mainboard 5 and a battery 6 arranged in the middle shell, the mainboard is installed at the middle rear end of the middle shell and is connected with the middle shell through screws, and the battery is adhered in the middle shell through foam.

[0025] Work flow, print preparation: push the lower cover part, put a stack of photo paper into the paper bin, close the lower cover again, under the action of the compression spring, the pressing plate lifts the photo paper to the surface of the paper feed roller, after starting: the carriage assembly is in a sealed state, the ink cartridge starts to flash and scrape ink, so as to enter the printing preparation state, the carriage assembly is driven by the carriage motor, rotates the lead screw through a plurality of gear transmissions, so as to realize the linear reciprocating motion of the carriage support, the carriage assembly starts to move to the left from the right sealed position, under the action of gravity, the sealing support slides down to the left along the second sliding slot and separates from the nozzle, the sealing support and the waist-shaped hole of the connecting rod slide relative to each other, at this time, the ink scraping support stops at the top platform of the left first sliding slot and is clamped by the limiting protrusion and cannot be pulled to the left side by the tension spring, when the nozzle moves to the left side and does not touch the first reset rod of the ink scraping support, it flashes and scrapes ink on the ink scraping piece, after scraping, the carriage part starts to hit the first reset rod of the ink scraping support to the left, under the drive of the carriage motor, the ink scraping support climbs out of the limiting protrusion in the first sliding slot on the left side of the guide support, and is pulled to the leftmost side under the action of the reset spring, at this time, there is no obstacle in the paper path 9, at the same time, the left carriage reset sensor 320 detects the carriage part, the preparation is completed and printing can be performed, after the terminal sends the printing data, the printer receives the information and starts printing, the paper feed motor can transmit power to the paper feed roller through a plurality of gear movements, under the drive of the paper feed motor, the paper is fed from the paper bin to the printing area and the paper feed accuracy is ensured, preferably, a gate is arranged at the paper outlet of the paper bin, the height of the paper outlet is between one paper and two papers, so that the problem of photo refeeding is avoided.

[0026] After the first-line positioning sensor 208 detects the photo, it moves to the corresponding position, and the carriage motor and the paper feed motor cooperate with each other to complete the photo printing task. After printing is completed, the photo is taken away, and the carriage assembly begins to enter the sealed state. The carriage motor drives the screw through the gear transmission. The rotation of the screw drives the carriage assembly to move to the right, thereby hitting the second reset rod on the sealing bracket and moving to the right together. At the same time, under the action of the second slide groove of the guide bracket, the sealing rubber presses the nozzle above the ink cartridge upward to achieve sealing; at the same time, under the action of the connecting rod, the ink scraper bracket is also pulled to the right and starts to move upward along the first slide groove on the left side of the guide bracket, so that the ink scraper can scrape the nozzle. Finally, the ink scraper bracket moves to the top platform on the right side of the limiting protrusion of the first slide groove, thereby jamming the ink scraper bracket, and the printer enters the ink scraper sealing state.

[0027] To sum up, the present invention points out a portable handheld inkjet printing mechanism. Without using other power, the screw drives the carriage assembly to move left and right to achieve contact and collision with the two sets of reset rods on the sealing scraper assembly, thereby completing the conversion of the printing channel and the scraper sealing space in a limited space. The space saving can make the machine small enough to meet the customer's miniaturization needs; the screw design meets the printer's precision and space requirements, and the innovative sealing scraper sealing assembly maximizes the use of space, so that the narrow space can meet the functional requirements of printing, flash spraying, scraping and sealing. The inkjet printing quality is good and not easy to fade, meeting the consumer's demand for instant printing of photos.

[0028] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A portable handheld inkjet printing mechanism, characterized in that: include: The sealing scraper assembly is provided at the front end of the middle shell, the core assembly is provided in the middle of the middle shell and the lower cover assembly is provided below the middle shell, the core assembly is used to press the sealing scraper assembly, which includes: a carriage drive mechanism, a paper feed drive mechanism and a carriage assembly, the sealing scraper assembly includes a guide bracket, a connecting rod, a reset spring, an ink scraper bracket, a sealing bracket and a sealing rubber provided on the sealing bracket, the ink scraper bracket and the sealing bracket are respectively slidably connected to the guide bracket, the ink scraper bracket is slidably arranged in a first slide groove on the left side of the guide bracket, and the sealing bracket is slidably arranged in a second slide groove on the right side of the guide bracket, the first slide groove has a limiting convex portion, one end of the connecting rod is connected to the bottom of the ink scraper bracket, and the other end is connected to the sealing bracket, one end of the reset spring is connected to the guide bracket, and the other end is connected to an end of the connecting rod close to the sealing bracket; The carriage drive mechanism includes a carriage motor, a first gear, a screw, and a screw gear provided on one end of the screw, wherein the screw gear is engaged with the first gear, and the first gear is engaged with the power output end of the carriage motor. The carriage assembly is equipped with an ink cartridge and is connected to the screw, and performs horizontal reciprocating motion under the drive of the carriage motor. When the carriage assembly moves to the far right and contacts the second reset rod, the ink scraping bracket is stuck by the limiting protrusion in the first slide groove and restricted in the top platform. At this time, the sealing rubber on the sealing bracket presses the nozzle on the ink cartridge, and the carriage assembly is in a sealed state; when the carriage assembly moves to the left until it contacts the first reset rod, the sealing bracket slides out of the second slide groove and separates from the nozzle on the ink cartridge. Driven by the carriage motor, the ink scraping bracket passes through the limiting protrusion and slides out from the top platform of the first slide groove, and moves to the far left under the action of the reset spring. At this time, the paper feed channel is opened.

2. The portable handheld inkjet printing mechanism according to claim 1, characterized in that: An ink scraping blade is clamped on the ink scraping bracket, a square groove is provided on the side of the ink scraping blade, and an oil-absorbing sponge is provided in the square groove. When the carriage assembly moves to the left, the ink scraping blade contacts the nozzle on the ink cartridge to scrape off excess ink.

3. The portable handheld inkjet printing mechanism according to claim 2, characterized in that: The first chute and the second chute are chute structures with an uphill structure, and the limiting protrusion is integrally formed on the inner side wall of the top platform of the first chute.

4. The portable handheld inkjet printing mechanism according to claim 1, characterized in that: One end of the connecting rod has a round hole and the other end has a waist-shaped hole. One end of the round hole is connected to the bottom of the ink scraping bracket through a screw, and the other end of the waist-shaped hole is sleeved on the positioning column of the sealing bracket.

5. The portable handheld inkjet printing mechanism according to claim 1, characterized in that: The carriage drive mechanism also includes a left bracket, a right bracket, an upper angle iron and a carriage guide shaft. The left bracket and the right bracket are connected together by the upper angle iron. The carriage assembly is installed between the left bracket and the right bracket through the carriage guide shaft. One end of the lead screw is rotatably connected to the right bracket, and a lead screw gear is installed on the other end. The carriage assembly is connected to the lead screw and performs horizontal reciprocating motion along the carriage guide shaft under the drive of the carriage motor. A carriage reset sensor is provided on the left bracket.

6. The portable handheld inkjet printing mechanism according to claim 5, characterized in that: The carriage assembly includes a carriage bracket, a spring plate rubber arranged in the carriage bracket, and a print head soft board covered on the spring plate rubber. The upper end of the carriage bracket is connected to the screw rod, and the lower end is connected to the carriage guide shaft.

7. The portable handheld inkjet printing mechanism according to claim 6, characterized in that: An elastic hook that matches the hook on the ink cartridge is provided on the front end surface of the carriage bracket, and clamping positions are provided on both sides of the rear end of the carriage bracket.

8. The portable handheld inkjet printing mechanism according to claim 5, characterized in that: The paper feeding drive mechanism includes: a paper feeding motor, a paper feeding roller, a paper feeding roller gear, a second gear, a third gear, a first reduction gear, a second reduction gear and a third reduction gear. The paper feeding roller is rotatably set on the upper angle iron and is equipped with a paper feeding roller gear. The paper feeding roller gear is engaged with the second gear, the second gear is engaged with the first reduction gear, the first reduction gear is engaged with the second reduction gear, the second reduction gear is engaged with the third reduction gear, and the third gear is set on the power output end of the paper feeding motor, and the third reduction gear is engaged with the third gear.

9. The portable handheld inkjet printing mechanism according to claim 1, characterized in that: The lower cover assembly includes a lower cover, a compression spring and a pressure plate. The lower cover is connected to the middle shell through a slide groove and can slide on the middle shell. The pressure plate is movably connected to the rear end of the lower cover. The compression spring is arranged between the lower cover and the pressure plate and pushes up the front end of the pressure plate.

10. The portable handheld inkjet printing mechanism according to claim 1, characterized in that: It also includes a mainboard and a battery arranged in the middle shell. The mainboard is installed at the middle and rear end of the middle shell and connected to the middle shell with screws; the battery is adhered to the middle shell by foam glue.

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