Transmission device and transmission system used in printing equipment and printing equipment

Abstract

The present invention is applied to a transmission device of a printing device, comprising: a main body, connected to a frame of the printing device, and capable of reciprocating linear movement along a recording medium conveying direction under the action of a driving force; a toothing portion, formed on a side of the main body, and meshingly connected with a gear of a driving device; a first linkage portion, protruding upward from an upper surface of the main body, and linking a rubber roller support of the printing device to rise when the main body moves to a first linkage position along a first direction; a second linkage portion, protruding at a front end of the toothing portion toward an output direction of the recording medium, and linking the rubber roller support to descend when the main body moves in the opposite direction of the first direction to a second linkage position; a third linkage portion, formed on a side of the main body, and linked to a pickup roller support of the printing device to rise; and a fourth linkage portion, formed on a side of the main body, and linked to a pickup roller support to descend.

Description

Technical Field

[0001] The present invention relates to the technical field of printers, and in particular to a transmission device and a transmission system applied to a printing device and a printing device. Background Art

[0002] Most printers are used in offices or homes. There are many types of printers, including inkjet, thermal, thermal transfer, electrostatic and other printers according to the technology used. Among them, thermal transfer printing equipment requires the use of a carbon ribbon cartridge, which includes a supply shaft, a recovery shaft and a carbon ribbon connected to the two shafts at both ends. It is very important to orderly carry out the transmission of the pickup roller, the printing unit and the carbon ribbon conveying in the micro device. The existing transmission structure coordinates the above work through a cam structure and a switching mechanism, which has a large space occupation ratio, and the coordination of the carbon ribbon conveying often adopts a complex switching mechanism. Summary of the invention

[0003] The invention provides a transmission device and a transmission system and a printing device applied to a printing device, aiming to improve the problem of complex cooperation between carbon ribbon conveying, a printing unit and a pickup roller of the existing printing device.

[0004] The present invention is achieved in that:

[0005] A transmission device applied to a printing device, characterized in that it comprises:

[0006] The main body is connected to the frame of the printing device and can reciprocate linearly along the recording medium conveying direction under the action of the driving force;

[0007] A gear engaging portion, formed on a side of the main body, for meshing with a gear of a driving device;

[0008] A first linkage portion protrudes upward from the upper surface of the main body, and links the rubber roller support of the printing device to rise when the main body moves to a first linkage position along a first direction;

[0009] A second linkage portion protrudes from the front end of the toothed portion toward the output direction of the recording medium, and links the rubber roller bracket to descend when the main body moves in the reverse direction of the first direction to the second linkage position;

[0010] A third linkage part is formed on the side of the main body and is used to link with the pickup roller bracket of the printing device to rise;

[0011] The fourth linkage part is formed on the side of the main body and is used to link with the pickup roller bracket to descend.

[0012] Furthermore, the transmission device is made in one piece.

[0013] Furthermore, a rack is provided on one side of the main body, and meshing teeth are provided on the top surface of the rack to form the toothed portion, and the third linkage portion and the fourth linkage portion are provided at the lower portion of the rack.

[0014] Furthermore, a horizontal sliding groove is provided on the side surface of the rack to form the third linkage part.

[0015] Furthermore, the bottom surface of the rack forms the fourth linkage portion, and a transition groove connecting the third linkage portion and the fourth linkage portion is provided between the two.

[0016] Furthermore, the front end of the rack protrudes to form the second linkage portion.

[0017] A transmission system, comprising the transmission device as claimed in the above claims, and also comprising a rubber roller bracket for carrying a printing rubber roller, and a pickup roller bracket for carrying a pickup roller, wherein the first linkage part contacts the bottom surface of the rubber roller bracket to raise the rubber roller bracket, and the second linkage part presses the rubber roller bracket to lower the rubber roller bracket; the pickup roller bracket comprises a first connecting part, the first connecting part cooperates with the third linkage part to raise the pickup roller bracket, and the first connecting part cooperates with the fourth linkage part to lower the pickup roller bracket.

[0018] Furthermore, a second connecting portion is provided on a side of the rubber roller bracket, and the second linkage portion presses against the second connecting portion to cause the rubber roller bracket to descend.

[0019] Furthermore, a first connecting portion is provided on the side of the pickup roller bracket, and the first connecting portion includes a cylinder. The cylinder cooperates with the third linkage portion to raise the pickup roller bracket, and the cylinder cooperates with the fourth linkage portion to lower the pickup roller bracket.

[0020] Furthermore, it also includes a printing unit, which includes a printing rubber roller and a thermal print head. The printing rubber roller is arranged on the rubber roller bracket and rises or falls accordingly. The matching relationship between the printing rubber roller and the thermal print head includes a printing state and a separation state.

[0021] The beneficial effect of the present invention is that the present invention sets a transmission device, which integrates the first linkage part and the second linkage part of the linkage rubber roller bracket, and the third linkage part and the fourth linkage part of the linkage pickup roller bracket, so that the printing unit and the pickup roller can work in a coordinated and orderly manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic structural diagram of a printing device at a first viewing angle according to an embodiment of the present invention;

[0024] Figure 2 yes Figure 1 An exploded schematic diagram of the printing device shown;

[0025] Figure 3 is a structural schematic diagram of a printing device in an initial state at a second viewing angle according to an embodiment of the present invention;

[0026] Figure 4 is a structural schematic diagram of an embodiment of the present invention, in which a printing device is in a conveying state at a second viewing angle;

[0027] Figure 5 is a structural schematic diagram of a printing device in a printing state at a second viewing angle according to an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of a transmission device in a third viewing angle according to an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a pickup roller device in a third viewing angle according to an embodiment of the present invention;

[0030] Figure 8 It is a schematic structural diagram of a switching device under a third viewing angle according to an embodiment of the present invention.

[0031] Icons: 100-printing device; 1-base; 2-transmission device; 3-pick-up roller device; 4-printing unit; 5-ribbon assembly; 6-switching device; 7-support plate; 8-driving device; 11-frame; 12-cassette; 121-window; 51-supply shaft; 52-ribbon; 53-recovery shaft; 41-thermal printing head; 42-printing rubber roller; 43-rubber roller bracket; 431-second bracket; 432-first bracket; 81-first driving group; 82-first transmission Part; 31-pick-up roller bracket; 32-pick-up roller; 33-rotating shaft; 34-first connecting part; 35-cylinder; 36-first gear; 61-second gear; 62-switching bracket; 63-connecting arm; 44-second connecting part; 45-protrusion; 46-elastic member; 64-column; 21-toothed part; 22-second linkage part; 23-rack; 24-third linkage part; 25-transition groove; 26-fourth linkage part; 27-first linkage part; 28-main body. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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 work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference Figures 1 to 8 As shown, the printing device 100 includes a base 1, a transmission device 2, a pickup roller device 3, a switching device 6, a driving device 8, a printing unit 4, and a carbon ribbon assembly 5. The base 1 includes a shell of the printing device 100 and a bracket disposed in a housing cavity of the shell, etc., and is used to cover, carry, and set structures and devices such as the transmission device 2, the pickup roller device 3, the switching device 6, and the driving device 8. The relevant structures or devices can be accommodated in the housing cavity of the shell, and can be fixed, detachable, or movably connected to the bracket.

[0036] The base 1 includes a box body 12 for accommodating recording media, a plurality of recording media are stacked in the cavity of the box body 12, a window 121 is provided on the box body 12, and the pickup roller device 3 contacts the recording media in the box body 12 through the window 121. A support plate 7 is provided on the base 1 for pressing the recording media toward the window 121, so as to help the pickup roller device 3 contact the recording media, and the recording media presses on the pickup roller 32 with a certain pressure.

[0037] The driving device 8 includes a plurality of driving members, which directly or indirectly transmit driving force to the switching device 6, the printing unit 4, the pickup roller device 3, the carbon ribbon assembly 5, etc. Usually, a plurality of transmission members are arranged between the driving force output end of the driving member and the input end of the structural driving force. A driving member can drive a plurality of components, and the driving member can be a power device in the form of electrical, pneumatic, hydraulic, etc. In this embodiment, a motor that is easy to install in a small device and has good working stability is adopted. The transmission member can be a gear, and a plurality of gears are arranged between the output end and the input end of the driving force, so as to facilitate setting of a suitable transmission ratio and transmission distance.

[0038] The printing unit 4 includes a printing roller 42, a roller support 43 for carrying the printing roller 42, and a thermal print head 41 disposed above the printing roller 42. The recording medium passes between the printing roller 42 and the thermal print head 41, and the thermal print head 41 presses the recording medium against the printing roller 42, and heats the recording medium or the carbon ribbon 52 provided with ink so that the ink reacts and leaves corresponding marks on the recording medium. The recording medium refers to a material on which a print mark can be left by printing with the printing device 100, such as A4 paper, photo paper, thermal paper, etc., all of which belong to the recording medium.

[0039] The carbon ribbon assembly 5 includes a supply shaft 51, a recovery shaft 53, and a carbon ribbon 52 coated with ink. The two ends of the carbon ribbon 52 are respectively wound around the supply shaft 51 and the recovery shaft 53. The recovery shaft 53 is connected to or separated from the switching device 6. When the recovery shaft 53 is connected to the switching device 6, it is driven by the driving force to rotate and rewind the carbon ribbon 52. The carbon ribbon 52 passes between the printing rubber roller 42 and the thermal printing head 41. The thermal printing head 41 heats the carbon ribbon 52 and transfers the ink thereon to the recording medium.

[0040] The printing device 100 further includes a conveying unit for outputting the recording medium. The conveying unit is located downstream of the printing unit 4. The conveying unit includes a conveying roller and a paper pressing roller pressed against the conveying roller. The driving device 8 transmits a driving force to the conveying roller, and the conveying roller rotates under the driving force. The printing rubber roller 42 bracket is sleeved on the conveying roller and can rotate around the axis of the conveying roller.

[0041] The transmission device 2 includes a main body 28, a toothed portion 21, a first linkage portion 27, a second linkage portion 22, a third linkage portion 24 and a fourth linkage portion 26. The transmission device 2 is integrally formed and can reciprocate linearly along the conveying direction of the recording medium under the action of a force. The main body 28 is connected to the base 1 of the printing device 100, and specifically, it is connected to a metal frame 11 in the base 1. A guide groove is provided on the frame 11, and a guide block protruding from the bottom surface of the main body 28 is arranged along the conveying direction of the recording medium. The guide block extends into the guide groove and can move along the guide groove.

[0042] A rack 23 is provided on one side of the main body 28, and meshing teeth are provided on the top surface of the rack 23 to form the meshing portion 21, which is connected to the driving device 8 through the meshing portion 21, so that the transmission device 2 is linearly reciprocated by the driving force. The rack 23 is provided on one side of the main body 28, and the rack 23 is arranged close to the side of the frame 11. The main body 28 is a plate structure with the bottom surface attached to the upper surface of the frame 11. The overall structure of the transmission device 2 can be optimized, and various parts of the transmission device 2 are attached above the frame 11 or close to the side of the frame 11, reducing the space occupied by the transmission device 2 in the printing device 100.

[0043] The first linkage part 27 and the second linkage part 22 are used to connect with the rubber roller bracket 43, and respectively link the rubber roller bracket 43 to rise or fall. In the embodiment, the first linkage part 27 protrudes upward on the upper surface of the main body 28, and links the rubber roller bracket 43 of the printing device 100 to rise when the main body 28 moves to the first linkage position along the first direction. The first direction can be the output direction of the recording medium, or it can be the opposite direction of the output of the recording medium. In the embodiment, the transmission device 2 is arranged upstream of the printing unit 4, so the first direction is the output direction of the recording medium. The first linkage part 27 moves along the first direction to the bottom of the rubber roller bracket 43 to lift the rubber roller bracket 43. Preferably, the bottom surface of the rubber roller bracket 43 is provided with a downwardly protruding portion to cooperate with the first linkage part 27.

[0044] The second linkage part 22 is arranged at the front end of the rack 23 and protrudes in the output direction of the recording medium. The second linkage part 22 is bent downward relative to the rack 23, and the transmission device 2 moves in the output direction of the recording medium. The second linkage part 22 can press the rubber roller bracket 43 and the switching bracket 62 at the same time, so that the rubber roller bracket 43 and the switching bracket 62 are both in a separated state, that is, the printing rubber roller 42 is separated from the thermal printing head 41, and the switching device 6 is separated from the recovery shaft 53. The second linkage part 22 is a long strip rod, and the bottom surface of the second linkage part 22 presses against the rubber roller bracket 43 and the switching bracket 62 to put them in a separated state. The second linkage part 22 has a certain length, so when the transmission device 2 moves in the output direction of the recording medium, the rubber roller bracket 43 and the switching bracket 62 will remain in the separated state for a certain period of time.

[0045] The third linkage part 24 and the fourth linkage part 26 are arranged at the lower part of the rack 23. The third linkage part 24 links the pickup roller bracket 31 of the printing device 100 to rise, and the fourth linkage part 26 links the pickup roller bracket 31 to descend. Specifically, a horizontal slide groove is provided on the side of the rack 23 to form the third linkage part 24, and the pickup roller bracket 31 is provided with a first connection part 34 that cooperates with the third linkage part 24, and the first connection part 34 can slide in the third linkage part 24. The bottom surface of the rack 23 forms the fourth linkage part 26, and a transition groove 25 is provided between the third linkage part 24 and the fourth linkage part 26 to connect the two. Of course, the fourth linkage part 26 can also be another slide groove provided on the side of the rack 23 and located below the third linkage part 24, so that the bottom surface of the rack 23 is directly used as the fourth linkage part 26 to reduce the volume of the rack 23. With the bottom surface of the main body 28 as a horizontal plane, the third linkage part 24 and the fourth linkage part 26 are arranged horizontally.

[0046] The rubber roller bracket 43 includes a first bracket 432 and a second bracket 431. The first bracket 432 and the second bracket 431 are both sleeved on the conveying roller. The first brackets 432 are respectively provided at both ends of the printing rubber roller 42. The two ends of the printing rubber roller 42 are hinged on the first bracket 432. An elastic member 46 is provided between the first bracket 432 and the second bracket 431 to connect the two. The elastic member 46 can generate an elastic force. The printing rubber roller 42 is pressed against the thermal printing head 41 under the action of the elastic force. The first linkage part 27 contacts the bottom surface of the second bracket 431 to push up the rubber roller bracket 43 and the printing rubber roller 42 as a whole. The first bracket 432 protrudes out of the long strip arm to form the second connecting part 44. The end of the second connecting part 44 is provided with a protrusion 45. When the protrusion 45 contacts the second linkage part 22, the switching bracket 62 is placed in a separated state.

[0047] The pickup roller device 3 includes a pickup roller 32, a rotating shaft 33 and a pickup roller bracket 31. The rotating shaft 33 is rotatably arranged on the pickup roller bracket 31 and rotates under the action of a driving force. The pickup roller 32 is sleeved on the rotating shaft 33 and rotates synchronously with the rotating shaft 33. The pickup roller bracket 31 rises or falls in coordination with the third linkage part 24 or the fourth linkage part 26. Specifically, a first gear 36 is arranged at one end of the rotating shaft 33. When the pickup roller bracket 31 is in a descending position in coordination with the third linkage part 24, the pickup roller 32 rotates and contacts the recording medium, and can push the recording medium to the printing unit 4. When the pickup roller bracket 31 is in an ascending position in coordination with the fourth linkage part 26, the pickup roller 32 stops rotating and separates from the recording medium, and the pickup roller 32 stops pushing the recording medium.

[0048] The pickup roller bracket 31 includes a first connection part 34. The main body 28 of the pickup roller bracket 31 protrudes out of a long strip arm to form the first connection part 34. The first connection part 34 includes a cylinder 35, which is located at the end of the first connection part 34 and inserted into the third linkage part 24. The first connection part 34 is inclined relative to the horizontal plane and is inclined in the opposite direction of the recording medium output, which has the effect of smoother cooperation with the third linkage part 24 and the fourth linkage part 26. Preferably, the inclination angle a of the first connection part 34 relative to the horizontal plane is 30° to 60 degrees. The pickup roller 32 contacts with the recording medium, and the pickup roller 32 rolls on the surface of the recording medium, and friction is generated between the two, and the recording medium moves under the action of the friction.

[0049] The switching device 6 includes a switching bracket 62, a second gear 61 and a third gear. The switching bracket 62 is rotatably mounted on the conveying roller of the printing device 100. The switching bracket 62 includes a main body 28 and a connecting arm 63 with a bending structure protruding from the main body 28. The connecting arm 63 is linked to rotate the switching bracket 62 around the conveying roller. The second gear 61 is mounted on the conveying roller and rotates synchronously with the conveying roller. The third gear is rotatably mounted on the switching bracket 62, swings around the conveying roller with the switching bracket 62, and is connected or separated from the carbon ribbon 52 recovery shaft 53 of the printing device 100 after swinging. The recovery shaft 53 is controlled to retract the carbon ribbon 52 or stop the retracting action by connecting or separating the switching device 6 with the recovery shaft 53.

[0050] The end of the connecting arm 63 is provided with a protruding column 64, the middle part of the connecting arm 63 is bent to form a linkage structure, the protrusion 45 of the second connecting part 44 hooks the linkage structure, and the connecting arm 63 is lifted to connect the third gear with the recovery shaft 53. The column 64 is acted upon by the third linkage part 24 to press down the connecting arm 63 to connect the third gear with the recovery shaft 53.

[0051] In the embodiment, the driving device 8 includes a first driving group 81 and a second driving group. The first driving group 81 drives the movement of the pickup roller device 3 and the transmission device 2, and the second driving group drives the rotation of the conveying roller. The first driving group 81 includes a first transmission member 82, through which the driving force is transmitted to the first gear 36 and the transmission device 2.

[0052] Working status:

[0053] In the initial state, the transmission device 2 is located at the initial position, the fourth linkage part 26 cooperates with the pickup roller bracket 31, and the pickup roller 32 is separated from the recording medium. The second linkage part 22 cooperates with the rubber roller bracket 43 and the switching bracket 62, the printing rubber roller 42 is separated from the thermal printing head 41, and the third gear is separated from the recovery shaft 53.

[0054] Conveying state: the transmission device 2 moves linearly in the opposite direction of the recording medium output to the first position, where the rear end of the transmission device 2 abuts against the positioning block on the frame 11. At this time, the pickup roller 32 descends and contacts the recording medium, the pickup roller bracket 31 cooperates with the third linkage part 24, and the rubber roller and the thermal print head 41 are in a separated state. The first drive group 81 drives the transmission device 2 to move linearly in the recording medium output direction, and the pickup roller 32 pushes the recording medium out along the output direction.

[0055] Printing state: After the conveying stage, the recording medium reaches the printing rubber roller 42, the transmission device 2 continues to move in the recording medium output direction, the first linkage part 27 moves to the bottom of the rubber roller bracket 43 to lift the rubber roller bracket 43, and the printing rubber roller 42 abuts against the thermal printing head 41. The fourth linkage part 26 cooperates with the pickup roller bracket 31, the pickup roller 32 is separated from the recording medium, the rubber roller bracket 43 is linked to the switching bracket 62, and the third gear is connected to the recovery shaft 53.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transmission device applied to a printing device, characterized in that: include: The main body is connected to the frame of the printing device and can reciprocate linearly along the recording medium conveying direction under the action of the driving force; A gear engaging portion, formed on a side of the main body, for meshing with a gear of a driving device; A first linkage portion protrudes upward from the upper surface of the main body, and links the rubber roller support of the printing device to rise when the main body moves to a first linkage position along a first direction; A second linkage portion protrudes from the front end of the toothed portion toward the output direction of the recording medium, and links the rubber roller bracket to descend when the main body moves in the reverse direction of the first direction to the second linkage position; A third linkage part is formed on the side of the main body and is used to link with the pickup roller bracket of the printing device to rise; The fourth linkage part is formed on the side of the main body and is used to link with the pickup roller bracket to descend.

2. The transmission device for printing equipment according to claim 1, characterized in that: The transmission device is made in one piece.

3. The transmission device for use in a printing device according to claim 2, characterized in that: A rack is provided on one side of the main body, and meshing teeth are provided on the top surface of the rack to form the toothed portion. The third linkage portion and the fourth linkage portion are arranged at the lower part of the rack.

4. The transmission device for use in a printing device according to claim 3, characterized in that: A horizontal sliding groove is provided on the side surface of the rack to form the third linkage part.

5. The transmission device for printing equipment according to claim 4, characterized in that: The bottom surface of the rack forms the fourth linkage part, and a transition groove connecting the third linkage part and the fourth linkage part is provided between the third linkage part and the fourth linkage part.

6. The transmission device for use in a printing device according to claim 5, characterized in that: The front end of the rack protrudes to form the second linkage portion.

7. Transmission system, characterized in that, The transmission device includes the transmission device described in any one of claims 1 to 6 above, and also includes a rubber roller bracket for carrying a printing rubber roller, and a pickup roller bracket for carrying a pickup roller, wherein the first linkage part contacts the bottom surface of the rubber roller bracket to raise the rubber roller bracket, and the second linkage part presses the rubber roller bracket to lower the rubber roller bracket; the pickup roller bracket includes a first connecting part, the first connecting part cooperates with the third linkage part to raise the pickup roller bracket, and the first connecting part cooperates with the fourth linkage part to lower the pickup roller bracket.

8. The transmission system according to claim 7, characterized in that: A second connecting portion is provided on the side of the rubber roller bracket, and the second linkage portion presses against the second connecting portion to make the rubber roller bracket descend.

9. The transmission system according to claim 8, characterized in that: A first connecting portion is provided on the side of the pickup roller bracket, and the first connecting portion includes a cylinder. The cylinder cooperates with the third linkage portion to make the pickup roller bracket rise, and the cylinder cooperates with the fourth linkage portion to make the pickup roller bracket fall.

10. A printing device, characterized in that It includes the transmission system as described in claim 7, and also includes a printing unit, the printing unit includes a printing rubber roller and a thermal print head, the printing rubber roller is arranged on the rubber roller bracket and rises or falls accordingly, and the matching relationship between the printing rubber roller and the thermal print head includes a printing state and a separation state.

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