Printer core and printer

Abstract

The invention discloses a printer core and a printer, the printer core is used for selectively printing a pigment on a color tape onto a printing medium through a printing unit, the color tape is driven by a rolling driving part which is rotatably arranged to be rolled, and the printing medium is conveyed by a paper feeding roller; the first driving source used for driving the paper feeding roller to rotate and the second driving source used for driving the winding driving part to rotate are arranged respectively, so that rotation of the winding driving part and rotation of the paper feeding roller do not interfere with each other, and the transmission problem of the winding driving part and the driving part of the winding driving part does not affect the paper feeding roller. Therefore, the possibility that the paper feeding roller shakes is greatly reduced, the phenomenon of horizontal stripes is well improved, and the printing quality is improved.

Description

Technical Field

[0001] The present invention relates to the field of printing devices, and particularly to a printer core and a printer. Background Art

[0002] In the prior art, a printer generally includes a printer core and a consumable unit. The printer core generally includes a frame, a paper feed roller, a print head, and a printing rubber roller disposed opposite to the print head. When the paper feed roller works, it drives the ribbon and the printing medium clamped between the print head and the printing rubber roller to move towards the printer outlet. The print head applies heat to the ribbon and the printing medium clamped between the print head and the printing rubber roller, so that the ink on the ribbon is transferred to the printing medium. The printer core also has an accommodating space, and the consumable unit is generally configured to be suitable for being placed in or taken out from the accommodating space of the printer core to achieve replacement.

[0003] In the existing printer core, the driving of the ribbon winding drive part and the paper feed roller share a single motor. The output end of the motor drives the paper feed roller to rotate through cooperation with a gear assembly. The other end of the paper feed roller is cooperated with the ribbon winding drive part through a gear assembly to realize the rotation of the winding drive part, thereby realizing the winding of the ribbon. In some printer cores (such as thermal sublimation printer cores), there is also a situation where it is necessary to drive the printing medium to retreat through the paper feed roller. Since the driving of the ribbon winding drive part and the paper feed roller share a single motor, it is also necessary to provide a swingable switching rod to control the switching rod to swing to the transmission position when the printing medium advances, and transmit the power output from the other end of the paper feed roller to the winding drive part through the gear on the switching rod, and control the switching rod to swing to the separation position when the printing medium retreats to cut off the power connection between the gear on the switching rod and the winding drive part, so as to prevent the used and wound ribbon from being unwound. However, in the process of printing of such printer cores, there is a phenomenon of "horizontal stripes" on the printed image, that is, there are stripe traces with different shades of color along the paper feed direction on the printed image. Summary of the Invention

[0004] The object of the present invention is to overcome the above-mentioned defects or problems in the background art or to provide a material basis for overcoming the above-mentioned defects or problems in the background art, and to provide a printer.

[0005] To achieve the above object, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0006] Solution 1, a printer core for selectively printing the pigment on the ribbon onto the printing medium through a printing unit. The ribbon is driven by a rotatably arranged winding drive part to be wound, and the printing medium is conveyed by a paper feed roller. A first drive source for driving the paper feed roller to rotate and a second drive source for driving the winding drive part to rotate are respectively provided.

[0007] Solution 2, based on Solution 1, the printer core includes a frame, the frame has a second side wall and a first side wall arranged oppositely along a first direction, and both ends of the paper feed roller along the first direction are supported by the second side wall and the first side wall respectively; along the first direction, both the first driving source and the second driving source are located between the second side wall and the first side wall.

[0008] Solution 3, based on Solution 2, the output ends of the first driving source and the second driving source face away from each other.

[0009] Solution 4, based on Solution 2, on a projection plane perpendicular to the first direction, the projections of the first driving source and the second driving source at least partially overlap.

[0010] Solution 5, based on Solution 2, both the first side wall and the second side wall are provided with first positioning parts suitable for positioning the ribbon cartridge. The printer core has a receiving space. The ribbon cartridge is correspondingly provided with second positioning parts for the first positioning parts. The ribbon cartridge is configured to be suitable for being loaded into the receiving space along the first direction, so that the second positioning parts are in positioning cooperation with the first positioning parts, and the winding shaft on the ribbon cartridge is in a non-rotating connection with the winding driving part.

[0011] Solution 6, based on Solution 1, the rotation axes of both the winding driving part and the paper feed roller extend along the first direction; the first driving source and the paper feed roller are driven by a first transmission mechanism, and the second driving source and the winding driving part are driven by a second transmission mechanism. The first transmission mechanism and the second transmission mechanism are respectively arranged on both sides of the printer core along the first direction.

[0012] Solution 7, based on Solution 6, the printer core includes a frame, the frame has a second side wall and a first side wall arranged oppositely along the first direction, both ends of the paper feed roller along the first direction are supported by the second side wall and the first side wall respectively, and the second transmission mechanism is located between the second side wall and the first side wall.

[0013] Solution 8, based on Solution 1, both the first driving source and the second driving source are motors.

[0014] Solution 9, based on Solution 8, the second driving source is a DC motor with variable speed.

[0015] Solution 10, a printer includes a ribbon cartridge and a printer core according to any one of Solutions 1 to 9.

[0016] From the above description of the present invention and its preferred embodiments, it can be seen that compared with the prior art, the technical solutions of the present invention and its preferred embodiments have the following beneficial effects due to the following technical means:

[0017] Through continuous observation, experimentation, and research, the inventor found that in the existing technical solutions, the reason for the technical problem of "horizontal stripes appearing on the printed image" is as follows: In the existing technology, the size of the printer core is made small enough to meet the requirements of being compact and portable (especially for portable photo printers). Due to space limitations, the thickness of the gears in the gear assembly on the ribbon side is set relatively thin (with low strength), making it difficult to match the torque required by the ribbon winding assembly. Or, due to low gear manufacturing precision or space limitations, the size of the switching lever is set small, resulting in insufficient strength, etc. These reasons can lead to poor cooperation between the gears or between the gears and the paper feed roller, unstable transmission, and ultimately cause the paper feed roller to shake, affecting the printing medium being printed, thus resulting in the "horizontal stripe" phenomenon.

[0018] 1. In Solution 1 and its preferred embodiments, a printer core is used to selectively print the pigments on the ribbon onto the printing medium through a printing unit. The ribbon is wound by a rotatably arranged winding drive unit, and the printing medium is conveyed by a paper feed roller. The first drive source for driving the paper feed roller to rotate and the second drive source for driving the winding drive unit to rotate are respectively arranged, enabling the rotation of the winding drive unit and the paper feed roller to not interfere with each other. The transmission problems of the winding drive unit and its driving parts will not affect the paper feed roller, thus greatly reducing the possibility of the paper feed roller shaking, and well improving the "horizontal stripe" phenomenon and enhancing the printing quality.

[0019] 2. In Solution 2 and its preferred embodiments, the printer core includes a frame. The frame has a second side wall and a first side wall arranged opposite to each other in the first direction. The two ends of the paper feed roller in the first direction are respectively supported by the second side wall and the first side wall, thus facilitating the stable transmission of the paper feed roller. In the first direction, both the first drive source and the second drive source are located between the second side wall and the first side wall. By the method of internally placing the first drive source and the second drive source, the size of the printer core in the first direction can be reduced compared to the method of externally placing the first drive source and the second drive source.

[0020] 3. In Solution 3 and its preferred embodiments, the output ends of the first drive source and the second drive source face away from each other, preventing the layout space from becoming larger due to interference when their output ends face the same direction, which would lead to an increase in the size of the printer core.

[0021] 4. In Solution 4 and its preferred embodiments, on the projection plane perpendicular to the first direction, the projections of the first drive source and the second drive source at least partially overlap, thereby reducing the size of the printer core in the paper feed direction or the height direction. While the printer core well improves the "horizontal stripe" phenomenon, it can also meet the requirements of being compact and portable.

[0022] 5. In scheme five and its preferred embodiments, a first positioning portion suitable for positioning the ribbon cassette is provided on the first side wall and the second side wall, the printing mechanism has a accommodating space, the ribbon cassette is provided with a second positioning portion corresponding to the first positioning portion, and the ribbon cassette is configured to be suitable for being loaded into the accommodating space along a first direction, so that the second positioning portion is positioned and matched with the first positioning portion, and the winding shaft on the ribbon cassette is connected to the winding drive portion to prevent rotation, thereby facilitating the positioning and installation of the ribbon cassette, and realizing reliable positioning of the ribbon cassette and a transmission connection between the winding drive portion and the winding shaft.

[0023] 6. In the sixth scheme and its preferred embodiment, the rotation axes of the winding drive unit and the paper feed roller both extend along the first direction; the first driving source and the paper feed roller are driven by the first transmission mechanism, and the second driving source and the winding drive unit are driven by the second transmission mechanism. The first transmission mechanism and the second transmission mechanism are respectively arranged on both sides of the printer mechanism along the first direction. The two are arranged separately to prevent the size of the printer mechanism from being increased in order to increase the clearance space for the already compact and small printer mechanism when they are arranged on the same side. Moreover, by driving through the transmission mechanism, the driving source and the corresponding driven element do not need to be arranged coaxially, thereby reducing the size along the first direction. In some schemes, it is also allowed to reduce the speed through the transmission mechanism to control the rotation speed of the corresponding driven element to adapt to printing.

[0024] 7. In Scheme 7 and its preferred embodiments, the printing mechanism includes a frame having a second side wall and a first side wall arranged along a first direction, two ends of the paper feed roller along the first direction are respectively supported by the second side wall and the first side wall, and the second transmission mechanism is located between the second side wall and the first side wall. Compared with being on the outside, the built-in second transmission mechanism can make the size of the printing mechanism along the first direction smaller.

[0025] 8. In scheme eight and its preferred embodiment, the first driving source and the second driving source are both motors, which have small size, long life and are easy to use.

[0026] 9. In Scheme 9 and its preferred embodiment, the second driving source is a variable speed DC motor, which will automatically change its speed to adapt to the current load, thereby preventing the linear speed of the ribbon from changing and causing the linear speed of the ribbon to not match the speed of the photo paper. Fewer parts are required, which has a cost advantage.

[0027] 10. In scheme 10 and its preferred embodiment, a printer includes a ribbon box and the above-mentioned printer mechanism, and has the beneficial effects brought by the above-mentioned printer mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 Partial perspective view of the printer core in Embodiment 1;

[0030] Figure 2 Structural schematic diagram of the printer core in Embodiment 1;

[0031] Figure 3 Perspective view of the ribbon cassette;

[0032] Figure 4 Perspective view at the first driving source in Embodiment 1;

[0033] Figure 5 Perspective view of the first transmission mechanism in Embodiment 1;

[0034] Figure 6 Structural schematic diagram at the paper feed roller in Embodiment 1;

[0035] Figure 7 Perspective view at the second driving source in Embodiment 1;

[0036] Figure 8 Perspective view of the second transmission mechanism in Embodiment 1;

[0037] Figure 9 Perspective view of the second transmission mechanism from another angle in Embodiment 1;

[0038] Figure 10 Structural schematic diagram at the winding driving part in Embodiment 1;

[0039] Figure 11 Structural schematic diagram of the friction transmission assembly in Embodiment 1;

[0040] Main reference numeral description:

[0041] Frame 1; first side wall 11; accommodation space 111; second side wall 12; first positioning portion 121; bottom wall 13; paper feed roller 2; winding drive portion 3; rotation prevention projection 31; printing unit 4; print head 41; printing rubber roller 42; first drive source 51; first transmission mechanism 52; first gear 521; second gear 522; third gear 523; fourth gear 524; fifth gear 525; first bracket 53; first support shaft 54; second support shaft 55; second drive source 61; second transmission mechanism 62; sixth gear 621; seventh gear 622; eighth gear 623; ninth gear 624; tenth gear 625; eleventh gear 626; second bracket 63; third support shaft 64; fourth support shaft 65; fifth support shaft 66; sixth support shaft 67; ribbon cartridge 7; winding shaft 71; rotation prevention groove 711; supply shaft 72; second positioning portion 74; second friction plate 81; biasing member 82; first friction plate 83; friction disk 84; first direction 9; Detailed implementation manner

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are all used to distinguish different objects and are not used to describe a specific order.

[0044] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "longitudinal", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0045] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrally connected, and being fixed by other devices or elements.

[0046] In the claims, the description and the above-mentioned drawings of the present invention, when the terms "comprising", "having" and their variants are used, are intended to mean "including but not limited to".

[0047] Embodiment 1

[0048] Reference Figures 1-10 , a printer, comprising a printer core and a ribbon cartridge, wherein the printer core is configured to selectively print the pigments on the ribbon onto a printing medium through a printing unit 4.

[0049] Among them, reference Figure 2 、 Figure 3 , the ribbon is usually installed on the ribbon cartridge 7 for easy replacement. The ribbon cartridge 7 is provided with a take-up reel 71 and a supply reel 72 that are adapted to rotate about an axis extending in a first direction 9. The supply reel 72 is wound with an unused ribbon, and the take-up reel 71 is wound with a used ribbon. The bottom wall of the ribbon cartridge 7 is located between the take-up reel 71 and the supply reel 72 and has a through hole for the ribbon to expose and contact the printing medium.

[0050] Reference Figures 1-10 , the printer core includes a frame 1, a paper feed roller 2, a take-up drive unit 3, a printing unit 4, a first drive source 51, a second drive source 61, a first transmission mechanism 52 and a second transmission mechanism 62, a first bracket 53, a second bracket 63, a first support shaft 54, a second support shaft 55, a third support shaft 64, a fourth support shaft 65 and a fifth support shaft 66, a sixth support shaft 67.

[0051] Reference Figure 7 , the frame 1 includes a second side wall 12 and a first side wall 11 that are arranged opposite to each other in the first direction 9, and a bottom wall 13 connecting the second side wall 12 and the first side wall 11.

[0052] First positioning portions 121 adapted to support and position the ribbon cartridge 7 are provided on both the first side wall 11 and the second side wall 12. The printer core has a receiving space 111 for receiving the ribbon cartridge 7. The ribbon cartridge 7 is provided with a second positioning portion 74 corresponding to the first positioning portion 121. The ribbon cartridge 7 is configured to be adapted to be loaded into the receiving space 111 in the first direction 9, so that the second positioning portion 74 is in positioning cooperation with the first positioning portion 121, and the take-up reel 71 of the ribbon is in non-rotating connection with the take-up drive unit 3.

[0053] Reference Figure 3 、 Figure 7, one of the first positioning portion 121 and the second positioning portion 74 is an insertion shaft extending along the first direction 9, and the other is a jack for plugging and mating with the insertion shaft. Specifically, in this embodiment, a plurality of first positioning portions 121 and second positioning portions 74 are respectively provided. The first positioning portion 121 is an insertion shaft, and the second positioning portion 74 is a jack. Of course, in other embodiments, when a plurality of first positioning portions 121 and second positioning portions 74 are respectively provided, the first positioning portion 121 may include both an insertion shaft and a jack. Correspondingly, the second positioning portion 74 is correspondingly provided to include a jack and an insertion shaft for plugging and mating with the first positioning portion 121.

[0054] Reference Figure 3 , Figure 9 , the take-up reel 71 is non-rotatably connected to the take-up driving portion 3 by providing a non-rotating protrusion 31 extending along the first direction 9 on one of the take-up reel 71 and the take-up driving portion 3, and a non-rotating groove 711 for non-rotatably plugging with the non-rotating protrusion 31 on the other.

[0055] When the ribbon cassette 7 is installed, the take-up reel 71 is non-rotatably connected to the take-up driving portion 3, so that the ribbon can be driven by the take-up driving portion 3 to rotate the take-up reel 71 to achieve winding.

[0056] Reference Figure 2 , the printing unit 4 includes a print head 41 and a printing rubber roller 42 installed on the frame 1. The print head 41 and the printing rubber roller 42 are oppositely arranged and are respectively located on the upper and lower sides of the ribbon. The two ends of the printing rubber roller 42 along the first direction 9 are respectively supported by the second side wall 12 and the first side wall 11. When the printing medium passes through, the print head 41, the ribbon, the printing medium, and the printing rubber roller 42 are arranged from top to bottom. Heat is applied to the ribbon and the printing medium clamped between the print head 41 and the printing rubber roller 42 through the print head 41 to selectively print the pigment on the ribbon onto the printing medium.

[0057] In this embodiment, the printer core is a thermal sublimation printer core, that is, printing is achieved by heating the solid pigment on the ribbon by the print head 41 to sublimate and transfer it to the printing medium. In other embodiments, the printer core may also be a thermal transfer printer core, that is, printing is achieved by heating the pigment on the ribbon by the print head 41 to melt and transfer it to the printing medium under pressure.

[0058] Reference Figure 2 , the paper feed roller 2 is adapted to convey the printing medium. In this embodiment, the paper feed roller 2 is located downstream of the printing rubber roller 42 along the paper output direction. The two ends of the paper feed roller 2 along the first direction 9 are respectively supported by the second side wall 12 and the first side wall 11, and the rotation axis of the paper feed roller 2 extends along the first direction 9.

[0059] Reference Figures 4-6The first driving source 51 is used to drive the paper feed roller 2 to rotate. The first driving source 51 is a stepping motor. Along the first direction 9, the first driving source 51 is located between the second side wall 12 and the first side wall 11, and the first driving source 51 is installed on the first side wall 11.

[0060] In this embodiment, the printing rubber roller 42 does not need to be provided with a driving source, and the printing rubber roller 42 rotates as the printing medium moves forward or backward during printing. Of course, in other embodiments, the paper feed roller 2 and the printing rubber roller 42 can also be the same roller, that is, the roller used to transport the printing medium and connected to the first driving source 51 and the roller used to cooperate with the print head 41 to clamp the printing medium are the same roller.

[0061] refer to Figure 4 , Figure 5 , the first bracket 53 is fixedly connected to the first side wall 11, such as by a fastener, and the first driving source 51 is mounted on the first side wall 11 through the first bracket 53. The first bracket 53 is located between the first side wall 11 and the second side wall 12, and the first support shaft 54 ​​and the second support shaft 55 both extend along the first direction 9, and both ends are supported by the first side wall 11 and the first bracket 53, respectively. The first support shaft 54 ​​and the second support shaft 55 can be assembled by plugging with the first side wall 11 and the first bracket 53, or they can be integrally formed with one of the first side wall 11 and the first bracket 53, and assembled by plugging with the other. In other embodiments, the first bracket 53 can also be mounted on the bottom wall 13.

[0062] refer to Figure 4 , Figure 5 , the first transmission mechanism 52 connects the first driving source 51 and the paper feed roller 2 for transmission. The first transmission mechanism 52 includes at least two transmission gears whose rotation axes extend along the first direction 9. Specifically, the first transmission mechanism 52 includes a first gear 521, a second gear 522, a third gear 523, a fourth gear 524 and a fifth gear 525 that mesh in sequence. Among them, the first gear 521 meshes with the output shaft of the first driving source 51. The first gear 521 and the third gear 523 are sleeved on the first support shaft 54, the second gear 522 and the fourth gear 524 are sleeved on the second support shaft 55, the fourth gear 524 passes through the first side wall 11 and meshes with the fifth gear 525 located outside the first side wall 11, and the fifth gear 525 is connected to one end of the paper feed roller 2. The first gear 521, the second gear 522, the third gear 523, and the fourth gear 524 are all gears with two teeth arranged along the first direction 9, and the fifth gear 525 has only one tooth. At least part of the first transmission mechanism 52 is a reduction transmission between gears.

[0063] refer to Figures 7-10, the winding drive unit 3 is rotatably arranged on the second side wall 12 of the frame 1, and the rotation axis of the winding drive unit 3 extends along the first direction 9.

[0064] Reference Figure 8 , the second drive source 61 is used to drive the winding drive unit 3 to rotate, and the first drive source 51 for driving the paper feed roller 2 to rotate and the second drive source 61 for driving the winding drive unit 3 to rotate are respectively arranged, that is, the winding drive unit 3 and the paper feed roller 2 do not share the same drive source. The second drive source 61 is a motor. Specifically, in this embodiment, the second drive source 61 is a stepping motor.

[0065] Reference Figure 7 , along the first direction 9, the second drive source 61 is located between the second side wall 12 and the first side wall 11, and the output ends of the second drive source 61 and the first drive source 51 face away from each other. Preferably, on the projection plane perpendicular to the first direction 9, the projection of the second drive source 61 and the projection of the first drive source 51 at least partially overlap. In this embodiment, the projections of the two partially overlap. Of course, in other embodiments, it can also be set that on the projection plane perpendicular to the first direction 9, the projection of the second drive source 61 and the projection of the first drive source 51 completely overlap.

[0066] The second bracket 63 is fixedly connected to the second side wall 12 and / or the bottom wall 13, such as by fasteners. The second bracket 63 is located between the first side wall 11 and the second side wall 12. The third support shaft 64, the fourth support shaft 65, and the fifth support shaft 66 all extend along the first direction 9, and both ends are respectively supported by the second side wall 12 and the second bracket 63. Similarly, the third support shaft 64, the fourth support shaft 65, and the fifth support shaft 66 can be assembled by inserting into the second side wall 12 and the second bracket 63, or can be integrally formed with one of the second side wall 12 and the second bracket 63 and inserted into the other for assembly. One end of the sixth support shaft 67 is fixedly installed on the second side wall 12.

[0067] The second transmission mechanism 62 connects the second drive source 61 and the winding drive unit 3. The second transmission mechanism 62 and the first transmission mechanism 52 are respectively arranged on both sides of the printer along the first direction 9. The second transmission mechanism 62 includes at least two transmission gears whose rotation axes extend along the first direction 9. Specifically, refer to Figure 8, the second transmission mechanism 62 includes a sixth gear 621, a seventh gear 622, an eighth gear 623, a ninth gear 624, a tenth gear 625, and an eleventh gear 626 that are meshed in sequence. The sixth gear 621 is meshed with the output shaft of the second drive source 61. Among them, the sixth gear 621 and the eighth gear 623 are sleeved on the third support shaft 64, the seventh gear 622 and the ninth gear 624 are sleeved on the fourth support shaft 65, and the tenth gear 625 is sleeved on the fifth support shaft 66; the eleventh gear 626 and the winding drive part 3 are sleeved on the sixth support shaft 67, and the eleventh gear 626 is adapted to drive the winding drive part 3 to rotate.

[0068] In this embodiment, the eleventh gear 626 is drivingly connected to the winding drive part 3 through a friction drive assembly to drive the winding drive part 3 to rotate. Specifically, refer to Figure 10 , Figure 11 , the friction drive assembly includes a first friction plate 83, a friction disk 84, and a second friction plate. The first friction plate 83 is clamped between the eleventh gear 626 and the friction disk 84. The friction disk 84 is non-rotatably connected to the winding drive part 3. The second friction plate 81 is clamped between the eleventh gear 626 and the winding drive part 3. Both ends of the biasing member 82 act on the anti-loosening gasket on the sixth support shaft 67 and the winding drive part 3, so that the winding drive part 3 presses against the second friction plate 81, so that the second friction plate 81 is clamped between the eleventh gear 626 and the winding drive part 3, and the first friction plate 83 is clamped between the eleventh gear 626 and the friction disk 84, so that the eleventh gear 626 can drive the winding drive part 3 to rotate through the frictional force of the first friction plate 83 and the friction disk 84, and at the same time drive the winding drive part 3 to rotate through the frictional force of the second friction plate 81. In this embodiment, when the radius of the ribbon on the ribbon take-up reel 71 gradually increases with the winding of the ribbon, resulting in an increase in the linear velocity of the ribbon, slippage will occur between the friction plate and other components, thereby limiting the angular velocity of the ribbon take-up reel 71 and preventing the linear velocity of the ribbon from continuously increasing and causing problems such as ribbon breakage or slippage between the photo paper and the ribbon due to the mismatch between the linear velocity of the ribbon and the velocity of the photo paper.

[0069] The sixth gear 621, the seventh gear 622, the eighth gear 623, and the ninth gear 624 are all gears having two tooth parts arranged in the first direction 9, while the tenth gear 625 and the eleventh gear 626 each have only one tooth part, and at least part of the gears of the second transmission mechanism 62 are decelerated during transmission. And the thickness of at least part of the transmission gears of the second transmission mechanism 62 in the first direction 9 is less than the thickness of at least one transmission gear of the first transmission mechanism 52 in the first direction 9. For example, in this embodiment, the gear thicknesses of the sixth gear 621, the seventh gear 622, the eighth gear 623, and the ninth gear 624 are less than the gear thicknesses of the first gear 521, the second gear 522, the third gear 523, and the fourth gear 524.

[0070] When in use, since the first driving source 51 for driving the paper feed roller 2 to rotate and the second driving source 61 for driving the winding drive part 3 to rotate are respectively provided, the transmission problem at the winding drive part 3 will not affect the paper feed roller 2, thereby reducing the possibility of the paper feed roller 2 jumping, thereby reducing the occurrence of the "horizontal stripes" phenomenon and improving the printing quality.

[0071] Compared with the prior art, this embodiment has the following beneficial effects:

[0072] In an exemplary embodiment, a printing mechanism is used to selectively print the pigment on the ribbon onto the printing medium through the printing unit 4, the ribbon is driven and wound by a rotatably arranged winding drive unit 3, and the printing medium is transported by a paper feed roller 2; a first driving source 51 for driving the paper feed roller 2 to rotate and a second driving source 61 for driving the winding drive unit 3 to rotate are respectively arranged, so that the rotation of the winding drive unit 3 and the rotation of the paper feed roller 2 do not interfere with each other, and the transmission problem of the winding drive unit 3 and its driving part will not affect the paper feed roller 2, thereby greatly reducing the possibility of shaking of the paper feed roller 2, greatly improving the "horizontal stripes" phenomenon, and improving the printing quality.

[0073] In an exemplary embodiment, the printing mechanism includes a frame 1, the frame 1 has a second side wall 12 and a first side wall 11 arranged relatively along a first direction 9, and the two ends of the paper feed roller 2 along the first direction 9 are respectively supported by the second side wall 12 and the first side wall 11, so as to facilitate the stable transmission of the paper feed roller 2. Along the first direction 9, the first driving source 51 and the second driving source 61 are both located between the second side wall 12 and the first side wall 11. By means of internally arranging the first driving source 51 and the second driving source 61, the size of the printing mechanism along the first direction 9 can be reduced compared with the method of externally arranging the first driving source 51 and the second driving source 61.

[0074] In an exemplary embodiment, the output end of the first driving source 51 and the output end of the second driving source 61 are separated from each other to prevent the layout space from becoming larger due to interference when the output ends of the two are in the same direction, resulting in an increase in the size of the printing mechanism.

[0075] In an exemplary embodiment, on a projection plane perpendicular to the first direction 9, the projection of the first driving source 51 and the projection of the second driving source 61 at least partially overlap, thereby reducing the size of the printing mechanism in the paper feeding direction or the height direction, so that the printing mechanism can greatly improve the "horizontal stripes" phenomenon while meeting the requirements of compact space.

[0076] In an exemplary embodiment, a first positioning portion 121 suitable for positioning the ribbon cassette 7 is provided on the first side wall 11 and the second side wall 12, the printing mechanism has a receiving space 111, and the ribbon cassette 7 is provided with a second positioning portion 74 corresponding to the first positioning portion 121, and the ribbon cassette 7 is configured to be suitable for being loaded into the receiving space 111 along the first direction 9, so that the second positioning portion 74 is positioned and matched with the first positioning portion 121, and the winding shaft 71 on the ribbon cassette 7 is connected to the winding drive unit 3 to prevent rotation, thereby facilitating the positioning and installation of the ribbon cassette 7, and realizing reliable positioning of the ribbon cassette 7, and a transmission connection between the winding drive unit 3 and the winding shaft 71.

[0077] In an exemplary embodiment, the rotation axes of the winding drive unit 3 and the paper feed roller 2 both extend along the first direction 9; the first driving source 51 and the paper feed roller 2 are driven by the first transmission mechanism 52, and the second driving source 61 and the winding drive unit 3 are driven by the second transmission mechanism 62. The first transmission mechanism 52 and the second transmission mechanism 62 are respectively arranged on both sides of the printer mechanism along the first direction 9. The two are arranged separately to prevent the size of the printer mechanism from being increased in order to increase the clearance space for the already compact and small printer mechanism when they are arranged on the same side. Moreover, by driving through the transmission mechanism, the driving source and the corresponding driven element do not need to be coaxially arranged, thereby reducing the size of the printer along the first direction 9. In some schemes, it is also allowed to decelerate through the transmission mechanism to control the rotation speed of the corresponding driven element to adapt to printing.

[0078] In an exemplary embodiment, the first transmission mechanism 52 includes at least two transmission gears whose rotation axes extend along the first direction 9, and the second transmission mechanism 62 includes at least two transmission gears whose rotation axes extend along the first direction 9. The thickness of at least part of the transmission gears of the second transmission mechanism 62 along the first direction 9 is less than the thickness of at least one transmission gear of the first transmission mechanism 52 along the first direction 9, thereby reducing the space occupied by the second transmission mechanism 62 along the first direction 9, making the size of the printer smaller, or facilitating the layout of other parts.

[0079] In an exemplary embodiment, the printer includes a frame 1, the frame 1 has a second side wall 12 and a first side wall 11 arranged relatively along a first direction 9, the two ends of the paper feed roller 2 along the first direction 9 are supported by the second side wall 12 and the first side wall 11 respectively, and the second transmission mechanism 62 is located between the second side wall 12 and the first side wall 11. Compared with being on the outside, the built-in second transmission mechanism 62 can make the size of the printer movement along the first direction 9 smaller.

[0080] In an exemplary embodiment, the first driving source 51 and the second driving source 61 are both motors, which have small size, long life and are easy to use.

[0081] In an exemplary embodiment, a printer includes a ribbon cartridge and the above-mentioned printer core, and has the beneficial effects brought by the above-mentioned printer core.

[0082] Embodiment 2

[0083] The difference between this embodiment and Embodiment 1 is only that: the second driving source 61 is a DC motor, and the eleventh gear 626 is in a non-rotating fit with the winding driving part 3 so that the eleventh gear 626 is adapted to drive the winding driving part 3 to rotate. In this embodiment, due to the characteristics of the DC motor itself, it will automatically change its speed according to the load change to achieve speed adaptation. When the radius of the ribbon on the ribbon take-up reel 71 increases and the linear speed of the ribbon increases, the load of the DC motor increases, and the DC motor will automatically reduce its speed to adapt to the current load, thereby preventing the linear speed of the ribbon from continuously increasing and causing problems such as ribbon breakage or slippage between the photo paper and the ribbon due to the mismatch between the linear speed of the ribbon and the speed of the photo paper.

[0084] In this embodiment, there is no need to set the friction transmission component in Embodiment 1, the number of components is less, and it has more cost advantages.

[0085] The above description of the specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the inspiration of the present invention or the above embodiments, those of ordinary skill in the art, combined with common general knowledge, ordinary technical knowledge in the art and / or the prior art, through logical analysis, reasoning or limited experiments, can obtain modifications, equivalent replacements or other improvements to the embodiments of the present invention or some of its technical features, which should all be included within the protection scope of the present invention.

Claims

1. A printing mechanism, used for selectively printing the pigment on a ribbon onto a printing medium through a printing unit (4), wherein the ribbon is driven to be reeled by a reeling drive unit (3) which is rotatably arranged, and the printing medium is transported by a paper feed roller (2); characterized in that: A first driving source (51) for driving the paper feeding roller (2) to rotate and a second driving source (61) for driving the winding driving part (3) to rotate are respectively provided.

2. A printing mechanism as claimed in claim 1, characterized in that: The printing mechanism comprises a frame (1), the frame (1) having a second side wall (12) and a first side wall (11) arranged opposite to each other along a first direction (9), the two ends of the paper feed roller (2) along the first direction (9) are respectively supported by the second side wall (12) and the first side wall (11); along the first direction (9), the first driving source (51) and the second driving source (61) are both located between the second side wall (12) and the first side wall (11).

3. A printing mechanism as claimed in claim 2, characterized in that: The output end of the first driving source (51) and the output end of the second driving source (61) are away from each other.

4. A printing mechanism as claimed in claim 2, characterized in that: On a projection plane perpendicular to the first direction (9), a projection of the first driving source (51) and a projection of the second driving source (61) at least partially overlap.

5. A printer mechanism as claimed in claim 2, characterized in that: The first side wall (11) and the second side wall (12) are both provided with a first positioning portion (121) suitable for positioning the ribbon cassette (7); the printing mechanism has a receiving space (111); the ribbon cassette (7) is provided with a second positioning portion (74) corresponding to the first positioning portion (121); the ribbon cassette (7) is configured to be suitable for being loaded into the receiving space (111) along a first direction (9) so that the second positioning portion (74) is positioned and matched with the first positioning portion (121), and the winding shaft (71) on the ribbon cassette (7) is connected to the winding drive portion (3) to prevent rotation.

6. A printing mechanism as claimed in claim 1, characterized in that: The rotation axes of the winding drive unit (3) and the paper feed roller (2) both extend along a first direction (9); the first driving source (51) and the paper feed roller (2) are driven by a first transmission mechanism (52); the second driving source (61) and the winding drive unit (3) are driven by a second transmission mechanism (62); the first transmission mechanism (52) and the second transmission mechanism (62) are respectively arranged on both sides of the printing mechanism along the first direction (9).

7. A printer mechanism as claimed in claim 6, characterized in that: The printing mechanism comprises a frame (1), the frame (1) having a second side wall (12) and a first side wall (11) arranged opposite to each other along a first direction (9), the two ends of the paper feed roller (2) along the first direction (9) are respectively supported by the second side wall (12) and the first side wall (11), and the second transmission mechanism (62) is located between the second side wall (12) and the first side wall (11).

8. A printer mechanism as claimed in claim 1, characterized in that: The first driving source (51) and the second driving source (61) are both motors.

9. A printer mechanism as claimed in claim 8, characterized in that: The second driving source (61) is a DC motor with variable speed.

10. A printer, characterized in that: The invention comprises a ribbon cassette and a printing mechanism as claimed in any one of claims 1 to 9.

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