Driving device and printer

Abstract

The utility model relates to a driving device and a printer. The driving device comprises a driving seat, a printing head mounting seat and a driving cylinder, a connecting frame is further arranged on the driving seat, the printing head mounting seat is arranged on the connecting frame in a sliding mode, an abutting hole is formed in the printing head mounting seat, and the driving cylinder is arranged in the abutting hole. The driving cylinder comprises a cylinder body, a first-stage piston shaft and a second-stage piston shaft, the first-stage piston shaft and the second-stage piston shaft are arranged in the cylinder body in a sliding mode, the output end of the first-stage piston shaft is connected with the driving base, an ejection piece is arranged at the output end of the second-stage piston shaft, and the conical surface of the ejection piece linearly abuts against the abutting hole. The driving device has the advantages of being high in flexibility and long in service life.

Description

Technical Field

[0001] The utility model relates to the field of printers, in particular to a driving device and a printer. Background Art

[0002] Thermal transfer printing is a printing technology that transfers the toner coating on the carbon ribbon to paper or other types of materials through a print head. During the printing process, the carbon ribbon is transported by a motor, and the print head moves in the height direction under the control of the drive cylinder. When the print head heats and presses the carbon ribbon against the substrate, the toner in the heated area is printed on the substrate to form a printed pattern. Existing thermal transfer printers usually have two printing modes: continuous printing and intermittent printing. When in intermittent printing, the substrate will stay in the area to be printed during the printing process, and after the print head presses the carbon ribbon against the substrate, it will move to the left or right relative to the substrate and peel the print head and the carbon ribbon through the roller. However, the existing drive cylinder usually has a serious scratch between the inner cavity and the piston rod, and even a stuck fault, which requires frequent maintenance and replacement. Moreover, since the moving direction of the print head is usually related to the tilt direction of the print head heating area and the position of the roller, but the direction of the print head is usually fixed, the existing printer can usually only print in a single direction. When reverse printing is required, the equipment needs to be replaced as a whole, which generates high production costs and cannot meet market demand. Utility Model Content

[0003] Based on this, the purpose of the present invention is to provide a driving device and a printer, which have the advantages of high flexibility and long service life.

[0004] A driving device includes: a driving seat, a print head mounting seat and a driving cylinder, wherein the driving seat is also provided with a connecting frame, the print head mounting seat is slidably provided on the connecting frame, an abutment hole is provided on the print head mounting seat, the driving cylinder includes a cylinder body, and a primary piston shaft and a secondary piston shaft slidably provided in the cylinder body, the output end of the primary piston shaft is connected to the driving seat, the output end of the secondary piston shaft is provided with a top piece, and the conical surface of the top piece is linearly abutted with the abutment hole.

[0005] The drive device described in the utility model has a simple and compact structure. The sliding of the print head mounting seat is limited by a connecting frame. At the same time, a certain radial activity space is set at the connection of the secondary piston shaft. While ensuring that the print head can be moved accurately, it avoids serious scratching or even jamming between the inner cavity of the drive cylinder and the secondary piston shaft, thereby extending the service life of the drive device.

[0006] Furthermore, the primary piston shaft includes a rod body and a connecting part, the connecting part is arranged at one end of the rod body away from the cylinder body, the connecting part passes through the drive seat and is fixed by a retaining spring, and a spring sheet is sleeved on the outside of the connecting part, and the spring sheet is compressed and clamped between the drive seat and the rod body, or between the drive seat and the retaining spring. This structure also provides a certain radial activity space at the connection of the primary piston shaft to avoid the situation where the inner cavity of the drive cylinder and the primary piston shaft are seriously scratched or even stuck, and further improves the flexibility of the drive device and extends the service life of the drive device.

[0007] Furthermore, there are two first-stage piston shafts symmetrically arranged on both sides of the second-stage piston shaft. This structure can make the print head mounting seat bear force steadily, and after the drive device rotates to realize the left and right exchange of the print head, the print head mounting seat can still be driven steadily, thereby improving the accuracy of printing control.

[0008] Furthermore, a first linear guide is provided on the connecting frame, and the print head mounting seat is provided on a slide block of the first linear guide. The linear guide limits the sliding movement of the print head mounting seat, thereby improving the movement accuracy of the print head.

[0009] Furthermore, the connecting frame is provided with a mounting groove with a side opening, a screw is passed through the mounting groove, the head of the screw abuts against the connecting frame, and the bottom of the screw is threadedly connected to the driving seat. This structure can achieve fine adjustment of the position of the connecting frame, thereby ensuring the coaxiality of the abutment hole and the secondary piston shaft.

[0010] A printer comprises a sliding assembly, a slide table, the driving device as described above, and a print head, wherein the sliding assembly drives the driving device to reciprocate along the slide table, and the print head is connected to the print head mounting seat.

[0011] Furthermore, the slide is provided with a second linear guide rail, the drive seat includes a supporting portion and a mounting portion, the mounting portion is centrally symmetrically arranged on both sides of the supporting portion, and one of the mounting portions is connected to the slider of the second linear guide rail through a connecting block. The structure of the drive seat can realize the left-right interchange of the drive device, and its structure is easy to disassemble and assemble, reducing the difficulty of interchange.

[0012] Furthermore, a roller mounting frame is provided on the connection block, and two left-right symmetrical mounting holes are provided on the roller mounting frame, and the stripping roller is fixedly connected to a mounting hole close to the print head. This structure can adjust the position of the stripping roller after the drive device is swapped left and right, ensuring that the stripping roller can effectively separate the carbon ribbon from the print head.

[0013] Furthermore, the slide is provided with two wiring slots, which are symmetrically arranged about the midline of the slide, and are used to accommodate a plug electrically connected to the print head. The wiring slots can adjust the wiring position of the print head after the drive device is swapped left and right, prevent line interference, and make the overall structure of the printer compact.

[0014] Furthermore, the slide is provided with an air pipe groove for accommodating an air pipe, the air pipe groove extends along the center line of the slide, the cylinder body is provided with an air pipe connection hole, one end of the air pipe is connected to the air pipe connection hole, and the other end is connected to the air pump. The air pipe connection groove can adapt to the left and right interchange of the driving device to prevent line interference, and at the same time make the overall structure of the printer compact.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the printer described in the utility model;

[0017] Figure 2 It is an inverted structural diagram of the printer of the utility model;

[0018] Figure 3 It is a partial exploded view of the printer of the utility model;

[0019] Figure 4 is a front view of the driving device;

[0020] Figure 5 for Figure 4 A cross-sectional structural diagram of the driving device in the AA direction shown;

[0021] Figure 6 It is an exploded diagram of the driving device of the utility model;

[0022] Figure 7 is a structural diagram of the cylinder body;

[0023] Figure 8 This is the structural diagram of the drive seat;

[0024] Explanation of the reference numerals in the accompanying drawings: 1. driving seat; 11. supporting part; 12. mounting part; 2. print head mounting seat; 21. abutment hole; 3. driving cylinder; 31. cylinder body; 311. primary piston chamber; 312. secondary piston chamber; 313. vent hole; 314. air pipe connecting hole; 32. primary piston shaft; 321. rod body; 322. connecting part; 323. retaining spring; 324. spring piece; 33. secondary piston shaft; 331. top piece; 332. limiting nut; 4. connecting frame; 41. mounting groove; 5. first linear guide rail; 6. print head; 7. sliding assembly; 8. slide table; 81. second linear guide rail; 82. wiring groove; 83. air pipe groove; 9. connecting block; 10. roller mounting frame; 101. mounting hole; 102. stripping roller. DETAILED DESCRIPTION

[0025] See also Figure 1-8 , Figure 1 This is a structural diagram of the printer described in the utility model; Figure 2 It is an inverted structural diagram of the printer of the utility model; Figure 3 It is a partial exploded view of the printer of the utility model; Figure 4 is a front view of the driving device;

[0026] Figure 5 for Figure 4 A cross-sectional structural diagram of the driving device in the AA direction shown; Figure 6 It is an exploded diagram of the driving device of the utility model; Figure 7 is a structural diagram of the cylinder body; Figure 8 This is the structural diagram of the drive seat.

[0027] The utility model discloses a driving device, including a driving seat 1, a print head mounting seat 2 and a driving cylinder 3. The driving cylinder 3 drives the print head mounting seat 2 to move relative to the driving seat 1, thereby driving the print head 6 to move. The driving cylinder 3 is a cylinder structure, and can actually be selected as an electric, hydraulic or other structural form.

[0028] See also Figure 1-7 , the driving seat 1 is also provided with a connecting frame 4, on which a print head mounting seat 2 is slidably provided. Specifically, a track of a first linear guide 5 is provided on the connecting frame 4, and the print head mounting seat 2 is provided on a slider of the first linear guide 5, so that the print head mounting seat 2 can slide in the vertical direction along the track of the first linear guide 5. A mounting groove 41 with a side opening is provided on the connecting frame 4, and a screw is passed through the mounting groove 41. The head of the screw abuts against the connecting frame 4, and the bottom of the screw is threadedly connected to the driving seat 1. During installation, the screw can be rotated to loosen it, so that the connecting frame 4 moves along the mounting groove 41, so as to fine-tune the position of the connecting frame 4 relative to the driving seat 1, so as to ensure that the output shaft of the driving cylinder 3 is in a vertical and mutually horizontal state, and to avoid scratches or jamming of the inner wall of the cylinder caused by movement.

[0029] The specific structure of the print head mounting seat 2 can be appropriately adjusted and designed according to actual conditions to ensure that the print head 6 can be stably fixed on the print head mounting seat 2. During the printing process, the print head 6 pushes the ribbon (such as a carbon ribbon, etc.) to press it against the substrate. At this time, the print end of the print head 6 is heated to leave a corresponding pattern on the substrate, completing the thermal transfer. Therefore, the print head 6 will perform high-frequency reciprocating movements, and the print head 6 needs to be stably connected to the print head mounting seat 2 to avoid displacement when touching and pressing the ribbon. In this embodiment, a support rod is provided on the print head mounting seat 2, and a socket is provided on the print head to be plugged into and matched with the support rod.

[0030] See also Figure 3-7 The drive cylinder 3 includes a cylinder body 31, and a primary piston shaft 32 and a secondary piston shaft 33 slidably arranged in the cylinder body 31. Two primary piston chambers 311 and one secondary piston chamber 312 are provided in the cylinder body 31. The two primary piston chambers 311 are connected to each other, and both are provided with a vent hole 313. The piston end of the primary piston shaft 32 slides in the primary piston chamber 311, and the piston end of the secondary piston shaft 33 slides in the secondary piston chamber 312. There are two primary piston shafts 32 and they are symmetrically arranged on both sides of the secondary piston shaft 33. The cylinder body 31 is provided with an air pipe connection hole 314, so that the piston shaft is driven to move by inputting gas. There are three air pipe connection holes 314, one of which is connected to the two primary piston chambers 311, and the other two are respectively connected to the rod chamber and the rodless chamber of the secondary piston chamber 312. In order to realize two-stage lifting, the output end of the primary piston shaft 32 extends downward from the cylinder body 31 and is connected to the drive seat 1. The output end of the secondary piston shaft 33 extends upward from the cylinder body 31 and is connected to the print head mounting seat 2 .

[0031] During the printing process, the print head 6 usually needs to move between three positions, namely, the initial position away from the carbon ribbon, the position to be printed close to the carbon ribbon, and the printing position where the carbon ribbon is pressed against the substrate. Therefore, when the primary piston shaft 32 is performing a telescopic movement, the print head 6 can be driven to move from the initial position to the position to be printed, so that the print head 6 enters a ready state; when the secondary piston shaft 33 is performing a telescopic movement, the print head 6 can be driven to move between the position to be printed and the printing position, so as to print on the substrate. The substrate can be a transparent roll tape, a CPP film, etc.

[0032] Since there are certain errors in the actual installation process of the primary piston shaft 32 and the secondary piston shaft 33, there is a slight deviation between the primary piston shaft 32 and the secondary piston shaft 33 relative to the chamber of the cylinder body 31, and it is easy to get stuck or scratch the inner wall of the cylinder body 31 during operation, which has a certain impact on the operating life and stability of the drive device. Therefore, when the primary piston shaft 32 and the secondary piston shaft 33 are connected to the drive seat 1 and the print head mounting seat 2 respectively, it is necessary to ensure that the axial connection is stable while also having a certain radial activity space. In this way, the high-speed and high-frequency reciprocating motion of the print head 6 is not easy to cause wear, and there is no need to stop the machine for maintenance as often as the existing equipment, which improves production efficiency and reduces maintenance costs.

[0033] See also Figure 4-5 The primary piston shaft 32 includes a rod body 321 and a connecting portion 322. The connecting portion 322 is arranged at one end of the rod body 321 away from the cylinder body 31. The connecting portion 322 passes through the drive seat 1 and is fixed by a retaining spring 323. A spring sheet 324 is sleeved outside the connecting portion 322. The spring sheet 324 is compressed and clamped between the drive seat 1 and the rod body 321, or between the drive seat 1 and the retaining spring 323, so as to tighten the axial direction of the primary piston shaft 32 to ensure the accuracy of the position of the print head 6.

[0034] For example, when the primary piston shaft 32 is deflected (for example, tilted to the right), the area on the spring sheet 324 corresponding to the deflected area (i.e., the right side of the spring sheet 324) is further compressed and deformed by greater pressure, while the area away from the deflected area (i.e., the left side of the spring sheet 324) is slightly released, and the deformation is reduced, but still maintains the compressed state. Therefore, when the primary piston shaft 32 is deflected relative to the chamber of the cylinder body 31, the primary piston shaft 32 can move relative to the drive seat 1 while adapting to the chamber of the cylinder body 31, and remain in a tight and non-loose state in the axial direction, thereby ensuring that the print head 6 can be accurately displaced. The spring sheet 324 can be a corrugated elastic gasket with multiple peaks arranged circumferentially.

[0035] See also Figure 6 The output end of the secondary piston shaft 33 is threadedly connected with a top piece 331, which is a conical structure or a spherical structure with a protrusion in the middle. The print head mounting seat 2 is provided with an abutment hole 21, and the conical surface (or arc surface) a of the top piece 331 is linearly abutted with the abutment hole 21, so that when the secondary piston shaft 33 lifts the print head mounting seat 2, the print head mounting seat 2 can be slightly deflected relative to the secondary piston shaft 33. The secondary piston shaft 33 is also fixed with a limit nut 332 by a nut, which pushes the print head mounting seat 2 to move when the secondary piston shaft 33 is reset.

[0036] See also Figure 1The utility model also discloses a printer, which includes a sliding assembly 7, a slide 8, a driving device as described above, and a print head 6. The sliding assembly 7 drives the driving device to reciprocate along the slide 8, and the print head 6 is connected to the print head mounting seat 2. The sliding assembly 7 usually adopts a structure in which a motor drives a synchronous belt, and the synchronous belt drives the driving device to slide left and right.

[0037] The slide 8 is provided with a second linear guide rail 81, see Figure 8 The drive seat 1 includes a supporting portion 11 and a mounting portion 12. The mounting portion 12 is centrally symmetrically arranged on both sides of the supporting portion 11, and one of them is connected to the slider of the second linear guide rail 81 through the connecting block 9. When it is necessary to exchange left and right (i.e., switch the printing direction of the print head 6 left and right), it is only necessary to remove the drive seat 1 from the connecting block 9, rotate the drive seat 1 180 degrees, and then install the drive seat 1 on the connecting block 9. Since the mounting portion 12 is a centrally symmetrical structure and the drive device itself has a certain degree of symmetry, the drive seat 1 can still be connected to the connecting block 9 after rotating 180 degrees, and the print head 6 can be rotated from the left (or right) direction to the right (or left) direction, so that quick adjustment can be achieved.

[0038] The connecting block 9 is provided with a roller mounting frame 10, and two left-right symmetrical mounting holes 101 are provided on the roller mounting frame 10, and a stripping roller 102 is fixedly connected to the mounting hole 101 near the print head 6. When the drive seat 1 rotates 180 degrees, the position of the print head 6 will be switched from the left (or right) side of the roller mounting frame 10 to the right (or left) side. At this time, the position of the stripping roller 102 needs to be adjusted, from the mounting hole 101 on the left (or right) side to the mounting hole 101 on the right (or left) side, to adapt to the change in the position of the print head 6, so as to ensure that the carbon ribbon and the substrate can be effectively stripped from the print head 6 during the printing process to prevent adhesion.

[0039] Two wiring slots 82 are provided on the slide 8, and the wiring slots 82 are symmetrically arranged about the center line of the slide 8. The wiring slots 82 are used to accommodate a plug electrically connected to the print head 6. The print head 6 is electrically connected to the plug through a flexible conductive circuit. When the print head 6 moves over the wiring slot 82, part of the conductive circuit is brought into the gap between the slide 8 and the drive seat 1 to avoid interference with the conductive circuit. An air pipe slot 83 for accommodating an air pipe is provided on the slide 8. The air pipe slot 83 extends along the center line of the slide 8. An air pipe connection hole 314 is provided on the cylinder body 31. One end of the air pipe is connected to the air pipe connection hole 314, and the other end is arranged along the air pipe slot 83 and extends to the air pump, thereby communicating with the air pump.

[0040] The drive device and printer described in the utility model have a simple and compact structure, and can realize the left-right interchange of the print head, thereby realizing the change of the printing direction of the printer, reducing the production cost. At the same time, the drive device thereof provides a certain radial activity space at the connection between the primary piston shaft and the secondary piston shaft, thereby ensuring that the print head can move accurately while avoiding serious scratches or even jamming, thereby extending the service life of the drive device.

[0041] It should be understood that, in the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0042] It should be noted that, in the description of this application, unless otherwise clearly specified and limited, the terms "disposed", "connected", "connected", and "hollow" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A driving device, It is characterized in that include: A driving seat, a print head mounting seat and a driving cylinder, wherein the driving seat is also provided with a connecting frame, the print head mounting seat is slidably provided on the connecting frame, an abutment hole is provided on the print head mounting seat, the driving cylinder comprises a cylinder body, and a primary piston shaft and a secondary piston shaft slidably provided in the cylinder body, the output end of the primary piston shaft is connected to the driving seat, the output end of the secondary piston shaft is provided with a top piece, and the conical surface of the top piece is linearly abutted with the abutment hole.

2. A driving device according to claim 1, Features: The first-stage piston shaft includes a rod body and a connecting part, wherein the connecting part is arranged at one end of the rod body away from the cylinder body, the connecting part passes through the drive seat and is fixed by a retaining spring, and a spring sheet is also sleeved on the outside of the connecting part, and the spring sheet is compressed and clamped between the drive seat and the rod body, or between the drive seat and the retaining spring.

3. A driving device according to claim 2, Features: There are two first-stage piston shafts, which are symmetrically arranged on both sides of the second-stage piston shaft.

4. A driving device according to claim 2, Features: The connecting frame is provided with a first linear guide rail, and the print head mounting seat is provided on a slider of the first linear guide rail.

5. A driving device according to claim 4, Features: The connecting frame is provided with a mounting groove with a side opening, and a screw is passed through the mounting groove. The head of the screw abuts against the connecting frame, and the bottom of the screw is threadedly connected with the driving seat.

6. A printer, Features: It comprises a sliding assembly, a slide table, a driving device as claimed in any one of claims 1 to 5, and a print head, wherein the sliding assembly drives the driving device to reciprocate along the slide table, and the print head is connected to the print head mounting seat.

7. A printer according to claim 6, Features: The slide is provided with a second linear guide rail, the drive seat comprises a supporting portion and a mounting portion, the mounting portion is centrally symmetrically arranged on both sides of the supporting portion, and one of the mounting portions is connected to the slider of the second linear guide rail through a connecting block.

8. A printer according to claim 7, Features: The connecting block is provided with a roller mounting frame, and the roller mounting frame is provided with two left-right symmetrical mounting holes, and the stripping roller is fixedly connected to a mounting hole close to the printing head.

9. A printer according to claim 8, Features: The slide table is provided with two wiring slots, the wiring slots are symmetrically arranged about the center line of the slide table, and the wiring slots are used to accommodate a plug electrically connected to the print head.

10. A printer according to claim 9, Features: The slide is provided with an air pipe groove for accommodating an air pipe, the air pipe groove extends along the center line of the slide, the cylinder body is provided with an air pipe connection hole, one end of the air pipe is connected to the air pipe connection hole, and the other end is connected to the air pump.

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