A paper roller swing assembly, a paper output structure and a printer

Abstract

The utility model relates to a printer technical field, concretely relates to a paper roller swing subassembly, print paper output structure and printer, including first pivot, second pivot, installation base and drive wheel, installation base is connected with first pivot, second pivot is rotatively connected with installation base, is equipped with transmission wheel on the second pivot, the rotation resistance of second pivot is greater than the rotation resistance of first pivot, drive wheel is connected with transmission wheel transmission, and drive wheel and first pivot rotate about same rotation axis. The present application utilizes one external power to drive installation base swing and roller body autorotation through drive wheel synchronism, realizes the rotation control of roller body, roller body relative paper box movement control, and two control structures are integrated to set up as one control structure, simplify printer structure, reduce cost, can also make roller body separate from paper box immediately when drive wheel reverses, makes print paper removal action and print paper printing action more smooth, improves printer operation stability and smoothness.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, specifically to a paper feed roller oscillation assembly, a paper output structure, and a printer. Background Technology

[0002] Thermal transfer printing equipment is a type of printer that can instantly print high-quality color photos via wired / wireless communication with mobile communication devices. Its core principle is to precisely transfer ink (or dye) from a ribbon to the substrate (such as paper, plastic, fabric, metal, etc.) using heat control, achieving high color reproduction and long-lasting photo output. Existing thermal transfer printing equipment generally includes a paper tray and a paper feed roller. The paper feed roller moves the printing paper out of the paper tray for printing. When the printing paper is output from the paper tray, the paper feed roller needs to contact the printing paper. However, due to space limitations within the printer, the roller and paper tray need to be separated during the reciprocating transfer process, leaving a channel for the printing paper to move back and forth between them.

[0003] However, due to the limitations of the paper feed roller components themselves, the rotation control of the roller body and the movement control of the roller body relative to the paper tray are currently separate control structures, resulting in a complex internal structure of the printer. Utility Model Content

[0004] This utility model discloses a paper feed roller swing assembly, a paper output structure, and a printer to solve the technical problem of complex internal structure in the prior art.

[0005] To solve the above problems, the present invention adopts the following technical solution: In a first aspect, this application provides a paper feed roller oscillation assembly for use in a printer, comprising: A first rotating shaft, the first rotating shaft having a rotational stroke about its axis; Mounting base, the mounting base being connected to the first rotating shaft; The second rotating shaft is rotatably connected to the mounting base, and a transmission wheel is provided on the second rotating shaft. The rotational resistance of the second rotating shaft is greater than that of the first rotating shaft. The drive wheel is connected to the transmission wheel, and the drive wheel and the first rotating shaft rotate around the same axis of rotation.

[0006] Secondly, this application provides a printing paper output structure, including a paper tray and the aforementioned paper feed roller swing assembly. The paper tray is used to hold printing paper and has a through hole for the roller to pass through. The rotation stroke of the mounting base includes a first position and a second position. In the first position, the roller passes through the through hole and abuts against the printing paper in the paper tray. In the second position, there is a first preset gap between the roller and the paper tray.

[0007] Thirdly, this application provides a printer that includes the aforementioned paper output structure.

[0008] The technical solution adopted in this utility model can achieve the following beneficial effects: This application utilizes an external power source to synchronously drive the mounting base to swing and the roller to rotate via a drive wheel. This achieves both roller rotation control and roller movement control relative to the paper tray. The two control structures are integrated into one, simplifying the printer structure and reducing costs. It also allows the roller to immediately separate from the paper tray when the drive wheel reverses, quickly creating a path for the paper to move back and forth during printing. This makes the paper removal and printing actions more seamless, improving the printer's operational stability and smoothness. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the paper feed roller oscillation assembly of this application; Figure 2 This is an exploded view of the paper feed roller oscillating assembly of this application; Figure 3 This is a structural schematic diagram of the paper feed roller swing assembly from another perspective (drive wheel rotating in the forward direction). Figure 4 This is a schematic diagram of the drive wheel structure of this application; Figure 5 This is a schematic diagram of the driven wheel in this application; Figure 6 This is a schematic diagram of the connection structure between the first rotating shaft and the mounting base in this application; Figure 7 This is a schematic diagram of the connection structure between the second rotating shaft and the paper-feeding roller in this application; Figure 8 This is another structural schematic diagram of the paper feed roller oscillating assembly of this application; Figure 9 yes Figure 8 Sectional view along line AA; Figure 10 This is a schematic diagram of the usage state of the paper feed roller oscillation assembly of this application; Figure 11 This is a schematic diagram of the cooperation between the paper feed roller swing assembly and the printing roller in this application (the drive wheel rotates in the opposite direction). Figure 12This is a structural schematic diagram of the cardboard box used in this application; Figure 13 This is a schematic diagram of the cooperation between the paper feed roller swing assembly and the lifting mechanism of this application (the paper box is hidden). Figure 14 This is a schematic diagram of the engagement between the drive wheel and the driven wheel in this application.

[0011] In the diagram: 10, Paper feed roller swing assembly; 100, First rotating shaft; 200, Second rotating shaft; 210, Cut surface; 220, Limiting step; 230, Annular groove; 300, Drive wheel; 310, Abutment part; 400, Transmission wheel; 410, Assembly cavity; 420, Limiting element; 500, Elastic element; 600, Driven wheel; 610, Movable groove; 700, Mounting base; 710, First support arm; 711, First mounting hole; 712, Protrusion; 713, Mounting groove; 720, Second support arm; 721, Second mounting hole; 730, Third support arm; 740, Rib plate; 800, First reset element; 900, Roller body; 20, Printing roller; 30, Paper tray; 31, Through hole; 41, Lifting plate; 42, Second reset element. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0013] In a typical working stroke of an existing dye-sublimation printer, the paper feed roller needs to contact the paper when outputting from the paper tray. However, due to space limitations of the printer itself, the roller and paper tray need to be separated during the reciprocating transfer of the paper, leaving a channel for the paper to move back and forth between them. Currently, the rotation control of the roller and the movement control of the roller relative to the paper tray are two independent control structures, resulting in a complex internal structure of the printer.

[0014] To address this, this application provides a paper feed roller oscillation assembly, a paper output structure, and a printer. A drive wheel synchronously drives the mounting base to oscillate and the roller to rotate. When the roller on the mounting base oscillates until it contacts the paper in the paper tray, the mounting base stops oscillating, while the roller continues to rotate, removing the paper from the paper tray. This achieves both roller rotation control and roller movement control relative to the paper tray, integrating the two control structures into one, simplifying the printer structure, reducing costs, and allowing the roller to immediately separate from the paper tray when the drive wheel reverses, quickly creating a path for the paper to move back and forth during printing. This makes the paper removal and printing actions smoother, improving the printer's operational stability and smoothness, as detailed in the following embodiments.

[0015] This embodiment provides a paper feed roller oscillation assembly applied to a printer, specifically a dye-sublimation printer or an inkjet printer; this embodiment preferably applies to a dye-sublimation printer. The paper feed roller oscillation assembly is specifically disposed in the printer's paper output structure, which feeds paper to the printer's printing module. During printing, the printer's drive module drives the paper to reciprocate through the printing module. During this process, the print head of the printing module, in conjunction with ribbons of different colors, sequentially prints yellow (Y), magenta (M), and cyan (C) on the paper, thereby printing the image on the paper with high quality. In some embodiments, light cyan and light magenta can be added according to actual printing needs to achieve a more delicate image transition; this is prior art and will not be elaborated upon here. Figures 1-3 As shown, the paper feed roller oscillation assembly 10 includes: A first rotating shaft 100 has a rotational stroke around its axis. A mounting base 700 is coaxially rotatably mounted on the first rotating shaft 100. The mounting base 700 rotates synchronously with the first rotating shaft 100 around the same axis. The mounting base 700 and the first rotating shaft 100 can be integrally formed, or they can be detachably connected. The detachable connection is existing technology and can specifically be a snap-fit, tenon joint, threaded connection, bolt connection, expansion joint, etc., which is not specifically limited here. The mounting base 700 can be a bracket or a cover-like structure with a cavity for accommodating the paper feed roller body 900. The second rotating shaft 200 is rotatably connected to the mounting base 700. When the transmission wheel 400 drives the mounting base 700 to rotate, the mounting base 700 also drives the second rotating shaft 200 to rotate around the rotation axis of the first rotating shaft 100. The roller body 900 and the transmission wheel 400 are coaxially rotatably mounted on the second rotating shaft 200. When the second rotating shaft 200 rotates around its own axis, the roller body 900 and the transmission wheel 400 also rotate synchronously around the axis of the second rotating shaft 200. The rotational resistance of the second rotating shaft 200 is greater than that of the first rotating shaft 100. Based on this structural design, when the second rotating shaft 200 is subjected to a tangential driving force, the second rotating shaft 200 will first drive the mounting base 700 to swing. When the swing of the mounting base 700 is restricted, only the second rotating shaft 200 drives the roller body 900 to rotate around its own axis. A drive wheel 300 is connected to a transmission wheel 400 to achieve synchronous rotation of the drive wheel 300 and the transmission wheel 400. The drive wheel 300 and the first rotating shaft 100 rotate around the same axis of rotation. Based on this structure, the drive wheel 300 can continuously apply force to the transmission wheel 400, causing the mounting base 700 and the second rotating shaft 200 to rotate synchronously around the axis of the first rotating shaft 100 on the same circumference. During this process, the drive wheel 300 can stably maintain a transmission connection with the transmission wheel 400. Correspondingly, the mounting base 700 carries the roller 900 towards the printing paper in the paper tray 30 until the mounting base 700 rotates until the roller 900 abuts against the printing paper in the paper tray 30. At this time, the contact pressure between the roller 900 and the printing paper is maintained due to the contact restriction of the printing paper. At the same time, the continued rotation of the mounting base 700 is restricted, ensuring stable contact between the roller 900 and the printing paper. Subsequently, the drive wheel 300... As the second shaft 200 continues to rotate, it drives the roller 900 to rotate around the axis of the second shaft 200, removing the printing paper from the paper tray and moving it toward the printing module. During subsequent multiple transfers of the printing paper, the drive wheel 300 reverses direction, applying a reversing force to the transmission wheel 400, immediately causing the mounting base 700 to rotate in the opposite direction, separating the roller 900 from the paper tray 30. This creates a channel for the reciprocating movement of the printing paper between the roller 900 and the paper tray 30, allowing the printing module's operation to immediately connect with the paper output operation. This avoids interference from the roller 900 after the printing paper is removed from its position, resulting in a smoother connection between the paper removal and printing actions, improving the printer's operational stability and smoothness. Furthermore, the rotation control of the roller 900 and its movement relative to the paper tray 30 are integrated into a single control structure, simplifying the printer structure and reducing costs.

[0016] In some embodiments, such as Figures 1-5As shown, the paper feed roller swing assembly can be configured to include a driven wheel 600 located on the axis of the first rotating shaft 100. Along the power transmission direction, the drive wheel 300, the driven wheel 600, and the transmission wheel 400 are sequentially connected in a transmission manner. The drive wheel 300 and the driven wheel 600 are circumferentially connected in a transmission manner, and there is a transmission idle stroke between the drive wheel 300 and the driven wheel 600. By utilizing the transmission idle stroke, the drive wheel 300 can drive and control other functional components inside the printer, simplifying the internal structure of the printer and improving space utilization. For example, the drive wheel 300 and the driven wheel 600 can be configured to rotate around the same axis of rotation. One of the axial end faces of the drive wheel 300 and the driven wheel 600 is provided with an abutment portion 310, and the other of the axial end faces of the drive wheel 300 and the driven wheel 600 is provided with a movable groove 610. The abutment portion 310 is disposed in the movable groove 610. The abutment portion 310 and the movable groove 610 are respectively disposed on the axial end faces of the drive wheel 300 or the driven wheel 600 that are close to each other. The abutment portion 310 abuts against the inner wall of the movable groove 610 to achieve a circumferential transmission connection between the drive wheel 300 and the driven wheel 600 along the first rotating shaft axis. A preset distance exists between the abutment portion 310 and the inner wall of the movable groove 610, which allows for a transmission idle stroke between the drive wheel 300 and the driven wheel 600. When the drive wheel 300 rotates, if the abutment portion 310 does not abut against the inner wall of the movable groove 610 along the rotation direction, only the drive wheel 300 rotates, while the second rotating shaft 200 and the mounting base 700 remain stationary. Correspondingly, a transmission idle stroke exists between the drive wheel 300 and the driven wheel 600. During this idle stroke, the drive wheel 300 can be used to drive and control other functional components within the printer, such as the printing roller 20 in the printing module. Figures 10-13 As shown, the drive wheel 300 can be used to drive the print roller 20 closer to the print head of the printing module (the print head is hidden in the figure), so that the printing paper located between the print roller 20 and the print head can make stable contact with the print head, thereby ensuring stable transfer of printing paper by the print head. This enables the drive wheel 300 to drive and control the third functional component, simplifying the internal structure of the printer and improving space utilization. Then, the rotational power of the drive wheel 300 will only be transmitted to the driven wheel when the drive wheel 300 drives the abutment part 310 to rotate and abut against the inner wall of the movable groove 610. The rotational power of the drive wheel 300 is transmitted to the transmission wheel 400, which drives the mounting base 700 to rotate around the axis of the first rotating shaft 100. If the abutment part 310 has already abutted against the inner wall of the movable groove 610 along the rotation direction, the rotational power of the drive wheel 300 will be directly transmitted to the transmission wheel 400 through the driven wheel 600, which drives the mounting base 700 to rotate around the axis of the first rotating shaft 100 until the roller body 900 abuts against the printing paper in the paper tray 30. Then, the printing paper is moved out of the paper tray 30 by the roller body 900 following the rotation of the second rotating shaft 200 around the axis of the second rotating shaft 200.

[0017] In some embodiments, the number of abutment portions 310 and movable grooves 610 is set to two, and the two abutment portions 310 and movable grooves 610 are symmetrically arranged on the drive wheel 300 or the driven wheel 600. The two abutment portions 310 move within the two movable grooves 610 respectively, and can simultaneously abut against the inner wall of the movable groove 610. By setting two abutment portions 310 and two movable grooves 610, the abutment portions 310 and movable grooves 610 are matched one-to-one, which can improve the force transmission efficiency between the drive wheel 300 and the driven wheel 600, and also allow the two abutment portions 310 to distribute the pressure, avoiding stress concentration and damage to the transmission stability between the drive wheel 300 and the driven wheel 600.

[0018] In another example, to achieve the transmission free travel between the drive wheel 300 and the driven wheel 600, such as Figure 14 As shown, the paper feed roller oscillating assembly may also include a traction member. The drive wheel 300 is connected to the driven wheel 600 via the traction member. The traction member has a redundant section, which is used to realize the transmission idle stroke between the drive wheel 300 and the driven wheel 600. That is, when the drive wheel 300 rotates in the forward direction, the drive wheel 300 first drives the traction member, straightening the redundant section of the traction member. Before the traction member is straightened, power will not be transmitted to the driven wheel 600, and the driven wheel 600 will not rotate accordingly, which corresponds to the transmission idle stroke. After the traction member is straightened, the drive wheel 300 can drive the driven wheel 600 to rotate synchronously around the axis of the first rotating shaft 100. The driven wheel 600 drives the transmission wheel 400, which in turn drives the mounting base 700 and the roller body 900 to rotate around the axis of the first rotating shaft 100. At the same time, the roller body 900 rotates around the axis of the second rotating shaft 200. The traction member can be a traction rope or a torsion spring.

[0019] It should be noted that the drive wheel 300, driven wheel 600, and transmission wheel 400 can be gears or rollers with a friction layer on their peripheral walls. In this embodiment, it is preferred that the drive wheel 300, driven wheel 600, and transmission wheel 400 all adopt a gear structure, and the driven wheel 600 and transmission wheel 400 mesh with each other.

[0020] Specifically, since there is a transmission idle stroke between the drive wheel 300 and the driven wheel 600, in order to ensure that the printing paper is removed from the correct position and to avoid the roller body 900 affecting the subsequent reciprocating transfer of the printing paper, the paper feed roller swing assembly 10 can be further configured to include a first reset member 800. The first reset member 800 is connected to the mounting base 700 and is used to control the mounting base 700 and the paper tray 30 to be in a separated state; based on the above structure, such as Figure 3 The rotation direction shown is such that after the drive wheel 300 rotates in the forward direction, driving the roller 900 to move the printing paper out of the paper tray 30 into place, the drive wheel 300 is then controlled to rotate in the reverse direction, as shown. Figure 11As shown in the rotation direction, the reverse drive wheel 300 and driven wheel 600 are in the transmission idle stroke. The mounting base 700 would not normally separate immediately from the paper tray. However, in this embodiment, due to the use of the first reset member 800, the mounting base 700 is driven to separate from the paper tray 30 by the action of the first reset member 800. That is, the driven wheel 600 rotates in the opposite direction following the drive wheel 300 due to the action of the first reset member 800. Since the reverse rotation stroke of the mounting base 700 is limited by the printer housing, after a certain reverse stroke, the mounting base 700 is fixed by the printer housing, correspondingly the driven wheel 600 is fixed, while the drive wheel 300 continues to rotate, ultimately allowing the drive wheel 600 to rotate. The transmission idle stroke between wheel 300 and driven wheel 600 corresponds to the control of printing roller 20. It can immediately separate roller 900 from printing paper after the printing paper is removed from the paper, and can also adjust the transmission idle stroke to the node after the roller 900 is separated from the printing paper to achieve the reset of driven wheel 600. Correspondingly, when driving printing roller 20 is driven by drive wheel 300, the transmission idle stroke is just right, so that the mounting base 700 and roller 900 are not interfered with by the movement of drive wheel 300. One drive wheel 300 can perform three different driving actions, while the three driving actions can be kept independent, effectively improving the printer's operating efficiency and stability.

[0021] In some embodiments, in order to enable the drive wheel 300 and the first rotating shaft 100 to rotate around the same axis, the drive wheel 300 can be sleeved on the first rotating shaft 100, or a separate rotating shaft can be provided for the drive wheel 300 to rotate. In this embodiment, it is preferred to use the drive wheel 300 sleeved on the first rotating shaft 100 to simplify the structure and improve space utilization.

[0022] In some embodiments, in order to enable the driven wheel 600 and the first rotating shaft 100 to rotate around the same axis, the driven wheel 600 can be sleeved on the first rotating shaft 100, or a separate rotating shaft can be provided for the driven wheel 600 to rotate. In this embodiment, it is preferred to use the driven wheel 600 sleeved on the first rotating shaft 100 to simplify the structure and improve space utilization.

[0023] In some embodiments, to ensure that the rotational resistance of the second rotating shaft 200 is greater than that of the first rotating shaft 100, the transmission wheel 400 can be connected to the mounting base 700 via an elastic element 500. The elastic element 500 is normally in a compressed state. The action of the elastic element 500 can increase the rotational resistance of the second rotating shaft 200, enhance the force transmission between the transmission wheel 400 and the mounting base 700, and allow the driving wheel 300 to rotate in the forward direction, thereby driving the mounting base 700 to rotate around the first rotating shaft 100 until the roller body 900 contacts the printing paper in the paper tray 30. It can also enhance the connection stability between the mounting base 700 and the second rotating shaft 200, and improve the rotational stability of the roller body 900. In some embodiments, a damping structure may be added at the rotatable connection between the second rotating shaft 200 and the mounting base 700, such as allowing the second rotating shaft 200 to be rotatably connected to the mounting base 700 via a flexible rubber ring or flexible protrusion, thereby increasing the rotational resistance of the second rotating shaft 200 and making the rotational resistance of the second rotating shaft 200 greater than that of the first rotating shaft 100.

[0024] In some embodiments, to facilitate quick mounting of the roller body 900 onto the mounting base 700, such as Figure 6 As shown, a first mounting hole 711 and a second mounting hole 721 can be provided on the mounting base 700. The first mounting hole 711 is a closed hole, that is, an O-shaped hole, which can limit and constrain the second rotating shaft 200 passing through the first mounting hole 711, reducing the risk of accidental detachment. The second mounting hole 721 is a semi-closed hole, that is, a C-shaped hole. The second rotating shaft 200 passes through the first mounting hole 711 and the second mounting hole 721 in sequence. During installation, the second rotating shaft 200 can first pass through the first mounting hole 711, and then be installed into the second mounting hole 721 through the opening of the second mounting hole 721. Based on the rotational cooperation between the second rotating shaft 200 and the first mounting hole 711 and the second mounting hole 721, the roller 900 on the second rotating shaft 200 can rotate relative to the mounting base 700 to drive the printing paper to move. Preferably, the first mounting hole 711 and the second mounting hole 721 are coaxially arranged. Figure 7As shown, the second rotating shaft 200 has a cut surface 210 at its end near the first mounting hole 711. The cut surface 210 is used to mount and connect the transmission wheel 400, enabling coaxial rotation of the second rotating shaft 200 and the transmission wheel 400. The cut surface 210 extends axially from the end face of the second rotating shaft 200 to its end face. Specifically, the cut surface 210 has a preset extension length from the end face of the second rotating shaft 200 along the axial direction of the second rotating shaft 200. This preset extension length is greater than the length of the first mounting hole 711. Because a stable rotational fit is required between the second rotating shaft 200 and the first mounting hole 711, the gap between the inner wall of the second rotating shaft 200 and the first mounting hole 711 is very small. The cut surface 210 on the second rotating shaft 200... 10. The cut surface 210 avoids the inner wall of the first mounting hole 711 during installation, so that the second rotating shaft 200 can be obliquely installed into the first mounting hole 711 without interference or with minimal interference (due to the limitation of the roller body 900, the second rotating shaft 200 needs to be obliquely installed into the first mounting hole 711 with its axis offset from the first mounting hole 711). This reduces assembly difficulty, avoids or reduces wear between the second rotating shaft 200 and the first mounting hole 711 during assembly, and improves production efficiency. In some embodiments, to further improve installation convenience, the cut surface 210 can be set to extend along the axial direction of the second rotating shaft 200 from the end face of the second rotating shaft 200 to pass through the first mounting hole 711.

[0025] In some embodiments, to further improve installation convenience, one end of the second rotating shaft 200 can be connected to the transmission wheel 400 after passing through the first mounting hole 711, and the other end of the second rotating shaft 200 can be connected to the second mounting hole 721 after passing through the second mounting hole 721. This reduces the risk of the second rotating shaft 200 falling off the mounting base 700, and also allows the part of the second rotating shaft 200 protruding from the second mounting hole 721 to serve as an operating part during the assembly process of the second rotating shaft 200 and the mounting base 700. This allows the second rotating shaft 200 to be operated outside the mounting base 700 for assembly, thereby reducing the space restriction imposed by the mounting base 700 on the second rotating shaft 200 during installation, extending the mounting lever arm of the roller body 900, and improving the assembly efficiency and ease of assembly of the roller body 900 and the mounting base 700.

[0026] Specifically, the mounting base 700 may include a first arm 710 and a second arm 720, with the first mounting hole 711 located on the first arm 710 and the second mounting hole 721 located on the second arm 720.

[0027] In some embodiments, to improve the rotational stability of the roller body, such as Figure 8 and Figure 9As shown, a mounting groove 713 can be provided on the side of the first mounting hole 711 near the transmission wheel 400. The elastic element 500 is sleeved on the second rotating shaft 200, with one end of the elastic element 500 abutting against the transmission wheel 400 and the other end of the elastic element 500 abutting against the inner wall of the mounting groove 713. Based on the above structural design, the mounting groove 713 can be used to pre-position the elastic element 500 during installation, reducing assembly difficulty, and the inner wall of the mounting groove 713 can be used to position the elastic element 500 on the second rotating shaft 200. The radial travel is limited to prevent the elastic element 500 from wobbling during operation. Especially when the inner diameter of the elastic element 500 matches the diameter of the second rotating shaft 200, the radial travel of the second rotating shaft 200 can be limited using the mounting groove 713. This ensures that the roller body 900 rotates around the axis of the second rotating shaft 200, reducing the risk of wobbling of the roller body 900 and the second rotating shaft 200, effectively improving the operational stability of the paper feed roller oscillation assembly 10, and reducing vibration and abnormal noise caused by the elastic element 500 during operation. The elastic element 500 can be a spring or a sheet spring; in this embodiment, a tubular spring is preferred.

[0028] In some embodiments, to improve the rotational stability of the roller body 900, such as Figure 2 and Figure 6 As shown, a protrusion 712 can also be provided on the first support arm 710, with the first mounting hole 711 passing through the protrusion 712. The elastic element 500 is sleeved on the protrusion 712, and the protrusion 712 restricts the radial travel of the elastic element 500 on the second rotating shaft 200, preventing the elastic element 500 from shaking during operation. This improves the operational stability of the roller body 900 and the paper feed roller oscillating assembly 10, and reduces vibration and abnormal noise caused by the elastic element 500 during operation. The protrusion 712 can be a combination of one or more arc-shaped structural components or a ring-shaped structural component. In this embodiment, a ring-shaped protrusion 712 is preferred.

[0029] In some embodiments, to improve assembly convenience, such as Figure 9As shown, an assembly cavity 410 can be provided on the side of the transmission wheel 400 near the mounting base 700. One end of the elastic member 500 abuts against the inner wall of the assembly cavity 410, and the other end of the elastic member 500 abuts against the first support arm 710. When the first support arm 710 has a mounting groove 713, the elastic member 500 abuts against the inner wall of the mounting groove 713. When the first support arm 710 has a protrusion 712, the elastic member 500 is sleeved on the protrusion 712 and abuts against the first support arm 710. Based on the above structure... During the assembly process, the elastic element 500 and the assembly cavity 410 can be used to pre-position the assembly cavity 410 and the elastic element 500, thereby improving the assembly efficiency of the paper feed roller swing assembly 10. At the same time, the assembly cavity 410 can be used to limit the radial movement of the elastic element 500 on the second rotating shaft 200, thereby preventing the elastic element 500 from shaking during operation, thus improving the running stability of the roller body 900 and the paper feed roller swing assembly 10, and reducing the vibration and abnormal noise caused by the elastic element 500 during operation.

[0030] In some embodiments, to prevent the elastic element 500 from being over-compressed and damaged during assembly, a second preset gap can be provided between the assembly cavity 410 and the first support arm 710. By utilizing the cooperation between the assembly cavity 410 and the first support arm 710, the compression stroke of the elastic element 500 located between the assembly cavity 410 and the first support arm 710 is limited, thereby protecting the elastic element 500 and preventing it from being over-compressed and damaged during assembly, thus ensuring the assembly quality stability of the paper feed roller swing assembly 10.

[0031] In some embodiments, to avoid interference between the roller body 900 and the second support arm 720 during assembly, a third preset gap can be provided between the second support arm 720 and the roller body 900. When the second rotating shaft 200 is inserted into the second mounting hole 721 through the opening of the second mounting hole 721, the third preset gap is used to avoid interference between the roller body 900 and the mounting base 700 during assembly, thereby reducing assembly difficulty, improving assembly efficiency, and ensuring assembly quality.

[0032] In some embodiments, the compressed elastic element 500 applies an axial thrust to the second rotating shaft 200 via the transmission wheel 400. To prevent axial slippage of the second rotating shaft 200, such as... Figure 7 and Figure 9As shown, the mounting base 700 can be configured to include a stop portion, and the second rotating shaft 200 is provided with a limiting step 220 that cooperates with the stop portion. The limiting step 220 cooperates with the stop portion to axially limit the second rotating shaft 200. Combined with the compressed elastic element 500, this prevents axial displacement of the second rotating shaft 200, allowing the transmission wheel 400 and the mounting base 700 to maintain a preload through the elastic element 500. This ensures that when the transmission wheel 400 rotates under force, it drives the mounting base 700 to rotate. Setting the limiting step 220 on the second rotating shaft 200 also facilitates the miniaturization design of the paper feed roller swing assembly 10, improving the printer's space utilization. Alternatively, in some embodiments, the second rotating shaft 200 can also be axially limited by abutting against the printer housing.

[0033] In some embodiments, to prevent the transmission wheel 400 from axially moving on the second rotating shaft 200, such as Figure 2 and Figure 6 As shown, an annular groove 230 can be provided on the peripheral wall of the second rotating shaft 200. The annular groove 230 is used to install the limiting member 420 to achieve axial limiting of the transmission wheel 400. After the second rotating shaft 200 is inserted into the first mounting hole 711, the elastic member 500 is first sleeved on the second rotating shaft 200, and then the transmission wheel 400 is sleeved on the second rotating shaft 200. The transmission wheel 400 is pushed towards the first support arm 710 to compress the elastic member 500 until the transmission wheel 400 moves between the annular groove 230 and the first support arm 710. Then the limiting member 420 is installed in the annular groove 230. The limiting member 420 is used to axially limit the transmission wheel 400, thereby keeping the elastic member 500 located between the transmission wheel 400 and the first support arm 710 in a preset compressed state.

[0034] In some embodiments, to improve the structural strength of the mounting base 700, the mounting base 700 may further include a third arm 730 located between the first arm 710 and the second arm 720. The stop portion is provided on the third arm 730. The first arm 710 and the third arm 730, and the second arm 720 and the third arm 730 are respectively connected by stiffeners 740. The stiffeners 740 can enhance the structural strength of the first mounting hole 711, the second mounting hole 721 and the stop portion, prevent the mounting base 700 from deforming during assembly and use, and improve the structural stability and safety of the paper feed roller swing assembly 10. Specifically, the stop portion may be set as a semi-closed hole on the third arm 730 through which the second rotating shaft 200 passes.

[0035] This embodiment provides a paper output structure, such as Figures 10-13As shown, the system includes a paper tray 30 and the paper feed roller swing assembly 10 in the above embodiment. The paper tray 30 is used to hold printing paper and has a through hole 31 for the roller body 900 to pass through. The rotation stroke of the mounting base 700 includes a first position and a second position. Driven by the forward rotation of the drive wheel 300, the mounting base 700 rotates to its limit, corresponding to the first position. In the first position, the roller body 900 on the mounting base 700 passes through the through hole 31 and abuts against the printing paper in the paper tray 30. The rotating roller body 900 can move the printing paper out of the paper tray 30 in this position. Driven by the reverse rotation of the drive wheel 300, the mounting base 700 rotates to its limit, and the roller body 900 rotates to its limit. The base 700 abuts against the printer housing, which corresponds to the second position. In the second position, there is a first preset gap between the roller 900 and the paper tray 30. This position corresponds to the paper being moved from the paper tray 30 to the printing module. The first preset gap provides a path for the paper to move during the reciprocating transfer process, avoiding interference from the roller 900 to the operation of the printing module. In addition, if the subsequent drive wheel 300 continues to rotate in the opposite direction, the power of the drive wheel 300 is transmitted to the transmission wheel 400. Although this will drive the transmission wheel 400, the second rotating shaft 200 and the roller 900 to rotate in the same direction, due to the setting of the first preset gap, the rotation of the roller 900 will not affect the paper. The roller 900 will only rotate idly.

[0036] In some embodiments, to facilitate continuous printing of different types of paper, the paper tray 30 may be provided with a paper output end for paper to pass through. The paper output structure also includes a guide surface corresponding to the paper output end. The guide surface is used to adjust the height of the paper passing through. Each time paper needs to be output, the roller 900 on the mounting base 700 is driven to rotate toward the paper tray 30 until the roller 900 abuts against the paper. Then, the roller 900, which rotates around the axis of the second rotating shaft 200, carries the paper out of the paper tray 30. Since there is a difference between the height of the paper in the paper tray 30 and the working height of the printing module, the height of the paper removed from the paper tray 30 is adjusted by the guide surface so that the height of the adjusted paper corresponds exactly to the working height of the printing module, so that the subsequent printing module can perform transfer work on the paper.

[0037] In some embodiments, to facilitate continuous printing of different types of paper, the paper output structure may also include a lifting mechanism. This lifting mechanism abuts against the paper inside the paper tray 30 and applies a thrust towards the roller 900 to the paper, cooperating with the mounting base 700 to ensure that, in the first position, the roller 900 passes through the through-hole 31 and abuts against the paper inside the paper tray 30. Specifically, the lifting mechanism includes a lifting plate 41 and a second reset member 42. The lifting plate 41 is located between the second reset member 42 and the through-hole 31 of the paper tray 30. The lifting plate 41 abuts against the paper inside the paper tray 30, and the second reset member 42 provides a thrust, pushing the lifting plate 41 towards the through-hole 31 of the paper tray 30, applying a thrust towards the roller 900 to the paper inside the paper tray 30. This ensures that the paper remains close to the through-hole 31 of the paper tray 30, facilitating the removal of the paper from the paper tray 30 by the roller 900 in the first position.

[0038] It should be noted that the first reset member 800 and the second reset member 42 can be springs or spring sheets, respectively. In this embodiment, it is preferred that both the first reset member 800 and the second reset member 42 are torsion springs.

[0039] This embodiment provides a printer, including the paper output structure described in the above embodiment.

[0040] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0041] In this document, the terms "first," "second," etc., are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class, without limiting the number of objects; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A paper feed roller oscillation assembly, used in a printer, characterized in that, include: A first rotating shaft (100) has a rotational stroke about its axis; Mounting base (700) is connected to first rotating shaft (100); The second rotating shaft (200) is rotatably connected to the mounting base (700), and a transmission wheel (400) is provided on the second rotating shaft (200). The rotational resistance of the second rotating shaft (200) is greater than that of the first rotating shaft (100). The drive wheel (300) is connected to the transmission wheel (400) and the drive wheel (300) and the first rotating shaft (100) rotate around the same rotation axis.

2. The paper feed roller oscillating assembly according to claim 1, characterized in that, The paper feed roller oscillating assembly includes a driven wheel (600) located on the axis of the first rotating shaft (100). Along the power transmission direction, the driving wheel (300), the driven wheel (600) and the transmission wheel (400) are sequentially connected in a transmission manner. The driving wheel (300) and the driven wheel (600) are circumferentially connected in a transmission manner, and there is a transmission idle stroke between the driving wheel (300) and the driven wheel (600).

3. The paper feed roller oscillating assembly according to claim 2, characterized in that, One of the axial end faces of the drive wheel (300) and the driven wheel (600) is provided with an abutment portion (310), and the other of the axial end faces of the drive wheel (300) and the driven wheel (600) is provided with a movable groove (610). The abutment portion (310) is located in the movable groove (610), and the abutment portion (310) abuts against the inner wall of the movable groove (610) to realize the circumferential transmission connection between the drive wheel (300) and the driven wheel (600) on the first rotating shaft axis. There is a preset distance between the abutment portion (310) and the inner wall of the movable groove (610), and the preset distance realizes the transmission idle stroke between the drive wheel (300) and the driven wheel (600). Alternatively, the paper feed roller oscillation assembly may further include a traction member, wherein the drive wheel (300) is connected to the driven wheel (600) via the traction member, and the traction member has a redundant section, which is used to realize the transmission idle stroke between the drive wheel (300) and the driven wheel (600).

4. The paper feed roller oscillating assembly according to claim 3, characterized in that, The drive wheel (300) is mounted on the first rotating shaft (100); And / or, the driven wheel (600) is mounted on the first rotating shaft (100).

5. The paper feed roller oscillating assembly according to any one of claims 1 to 4, characterized in that, The transmission wheel (400) is connected to the mounting base (700) via an elastic element (500), which is normally in a compressed state.

6. The paper feed roller oscillating assembly according to claim 5, characterized in that, The paper feed roller swing assembly (10) further includes a first reset member (800), which is connected to the mounting base (700) and is used to control the mounting base (700) and the paper box (30) to be in a separated state.

7. The paper feed roller oscillating assembly according to claim 5, characterized in that, The mounting base (700) is provided with a first mounting hole (711) and a second mounting hole (721). The first mounting hole (711) is a closed hole, and the second mounting hole (721) is a semi-closed hole. The second rotating shaft (200) passes through the first mounting hole (711) and the second mounting hole (721) in sequence. The end of the second rotating shaft (200) near the first mounting hole (711) is provided with a cut surface (210). The cut surface (210) is used to install and connect the transmission wheel (400) so as to realize the coaxial rotation of the second rotating shaft (200) and the transmission wheel (400). The cut surface (210) has a preset extension length from the end face of the second rotating shaft (200) along the axial direction of the second rotating shaft (200).

8. The paper feed roller oscillating assembly according to claim 5, characterized in that, The elastic element (500) is sleeved on the second rotating shaft (200), and the mounting base (700) is provided with a protrusion (712) or mounting groove (713) for fixing the elastic element (500).

9. A printing paper output structure, characterized in that, The assembly includes a paper tray (30) and a paper feed roller oscillating assembly (10) as described in any one of claims 1 to 8. The paper tray (30) is used to hold printing paper. The paper tray (30) is provided with a through hole (31) for the roller body (900) to pass through. The rotation stroke of the mounting base (700) includes a first position and a second position. In the first position, the roller body (900) passes through the through hole (31) and abuts against the printing paper in the paper tray (30). In the second position, there is a first preset gap between the roller body (900) and the paper tray (30).

10. The printing paper output structure according to claim 9, characterized in that, The paper tray (30) is provided with a paper output end for passing printing paper, and the printing paper output structure further includes a guide surface corresponding to the paper output end, the guide surface being used to adjust the height position of the passing printing paper; Alternatively, the paper output structure may further include a lifting mechanism that abuts against the paper inside the paper tray (30). The lifting mechanism is used to apply a thrust toward the roller (900) to the paper to cooperate with the mounting base (700) so that the roller (900) passes through the through hole (31) and abuts against the paper inside the paper tray (30) in the first position.

11. A printer, characterized in that, Includes the printing paper output structure as described in claim 9 or 10.

Images