Printing device
By adjusting the parallelism and distance between the thermal print head and the printing rubber roller through the adjustment component, the problem of uneven pressure in the printing device is solved, and the printing effect and adaptability are improved.
Patent Information
- Application Number
- CN202422913220.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-28
AI Technical Summary
In existing printing devices, the thermal print head and the printing roller are not parallel to each other, which leads to uneven pressure between the two ends of the printing line and the printing roller, affecting the printing effect.
The adjustment component includes an adjustment part and a pivot shaft. The adjustment part rotates around the axis of the pivot shaft, driving the rotating shaft and the print head bracket to move, adjusting the parallelism between the printing line of the thermal print head and the print roller. The distance between the printing line and the print roller is adjusted by rotating the rotating shaft around its own axis to ensure balanced pressure.
It achieves the balance of pressure between the thermal print head and the print roller, improves the printing effect and the ability to adapt to media of different thicknesses, and ensures the printing quality.
Smart Images
Figure CN223327183U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing, in particular to a printing device. Background Art
[0002] The printing device provided by the related art includes a frame, a thermal print head and a print roller mounted thereon. The thermal print head and the print roller cooperate, and thin media such as cards, paper, and checks pass between the thermal print head and the print roller. The print roller is used to drive the thin media. The thermal print head includes multiple heating points arranged along a straight line to form a print line. When the heating points of the thermal print head are controlled to heat, text or images can be printed on the thin media. However, due to processing and assembly errors, when the thermal print head and the print roller cooperate, there is a problem that the print line of the thermal print head is not parallel to the main line of the print roller. This leads to uneven pressure between the two ends of the print line and the print roller, affecting the printing effect. Utility Model Content
[0003] The purpose of the utility model is to provide a printing device to balance the pressure between the two ends of the printing line of the thermal print head and the printing rubber roller, thereby ensuring the printing effect.
[0004] To achieve this purpose, the present invention adopts the following technical solutions:
[0005] The printing device comprises a frame, an adjusting component and a printing component, the adjusting component comprising an adjusting member, the adjusting member being pivotally connected to the frame via a pivot shaft and being capable of rotating relative to the frame around the axis of the pivot shaft; the printing component comprising a printing roller, a print head bracket, a thermal print head and a rotating shaft, the printing roller being rotatably arranged on the frame; the print head bracket being connected to the rotating shaft, the thermal print head being mounted on the print head bracket, and the thermal print head being used to cooperate with the printing roller; a first end of the rotating shaft is supported by the frame, a second end of the rotating shaft is supported by the adjusting member, the second end of the rotating shaft being spaced apart from the axis of the pivot shaft, the rotating shaft being capable of rotating relative to the frame and the adjusting member around its own axis, and when the adjusting member rotates around the axis of the pivot shaft, the second end of the rotating shaft is driven to rotate synchronously around the axis of the pivot shaft.
[0006] As an optional solution, the adjusting member includes an adjusting plate, which is pivotally connected to the frame via the pivot shaft, the adjusting plate is provided with a support hole, the second end of the rotating shaft is rotatably plugged into the support hole, one of the frame and the adjusting plate is provided with a first threaded hole, and the other of the frame and the adjusting plate is provided with an annular long hole, the center of the annular long hole is located on the axis of the pivot shaft, and the adjusting assembly also includes a first fastener, which passes through the annular long hole and is threadedly connected to the first threaded hole for locking the position of the adjusting plate relative to the frame.
[0007] As an optional solution, the frame is provided with a limiting groove, the adjustment plate is embedded in the limiting groove, and the limiting groove is used to limit the angle of rotation of the adjustment plate relative to the frame around the axis of the pivot shaft.
[0008] As an optional solution, the frame includes a first support plate and a second support plate that are opposite to and spaced apart from each other, the print head bracket is located between the first support plate and the second support plate, the first end of the rotating shaft is supported by the first support plate, the adjustment plate is located on the side of the second support plate away from the first support plate, and the adjustment plate is pivotally connected to the second support plate; wherein the annular long hole is provided on the adjustment plate, and the first threaded hole is provided on the second support plate.
[0009] As an optional solution, the pivot shaft is a second fastener, and the adjustment plate is also provided with a pivot hole, the outer diameter of the pivot hole is adapted to the second fastener, and the second support plate is also provided with a second threaded hole, the second fastener passes through the pivot hole and is threadedly connected to the second threaded hole, the adjustment plate is pivoted to the second support plate through the second fastener, and can rotate relative to the second support plate around the axis of the second fastener.
[0010] As an optional solution, the frame includes a first support plate and a second support plate that are opposite to and spaced apart from each other, the print head bracket is located between the first support plate and the second support plate, the first end of the rotating shaft is supported by the first support plate, the adjustment plate is located on the side of the second support plate opposite to the first support plate, and the adjustment plate is pivotally connected to the second support plate; wherein the annular long hole is provided on the second support plate, and the first threaded hole is provided on the adjustment plate; the adjustment member also includes an operating member, the operating member is connected to the adjustment plate, and the operating member passes through the second support plate and extends to the side of the second support plate facing away from the first support plate.
[0011] As an optional solution, the pivot shaft is fixedly connected to the adjustment plate, the second support plate is provided with a pivot hole, and the pivot shaft is rotatably plugged into the pivot hole.
[0012] As an optional solution, the second support plate is provided with a mounting hole, the adjustment plate is provided with a driving long hole, the operating part includes a knob and a driving shaft connected to the knob, the knob and the driving shaft are eccentrically arranged, the knob is plugged into the mounting hole, and the knob can rotate around its own axis, the driving shaft is plugged into the driving long hole, and the outer diameter of the driving shaft is adapted to the width of the driving long hole, and when the knob rotates around its own axis, the driving shaft drives the adjusting plate to rotate around the axis of the pivot shaft.
[0013] As an optional solution, the rotating shaft is provided with a milling plane, the print head support is provided with a strip hole extending along the moving direction of the sheet medium, the milling plane is provided with a third threaded hole extending radially along the rotating shaft, and the printing component also includes a third fastener, the third fastener passes through the strip hole and is threadedly connected to the third threaded hole, for locking the position of the print head support relative to the rotating shaft.
[0014] As an optional solution, the printing device also includes a positioning component, which includes two first clamping parts and two second clamping parts, the two first clamping parts are both arranged on the frame and the two first clamping parts are respectively adjacent to the two axial ends of the printing rubber roller, the two second clamping parts are both arranged on the print head bracket, and the two second clamping parts are respectively located at the two ends of the thermal print head, wherein the first clamping part is one of the card slot and the card column, and the second clamping part is the other of the card slot and the card column, and the two card slots are clamped and matched with the two card columns in a one-to-one correspondence.
[0015] Beneficial effects of the utility model:
[0016] The utility model provides a printing device, which includes a frame, an adjusting component and a printing component. The adjusting component includes an adjusting member, which is pivotally connected to the frame through a pivot shaft and can rotate relative to the frame around the axis of the pivot shaft; the printing component includes a printing rubber roller, a print head bracket, a thermal printing head and a rotating shaft, and the printing rubber roller is rotatably arranged on the frame; the print head bracket is connected to the rotating shaft, the thermal printing head is installed on the print head bracket, and the thermal printing head is used to cooperate with the printing rubber roller; a first end of the rotating shaft is supported by the frame, and a second end of the rotating shaft is supported by the adjusting member, and the second end of the rotating shaft is spaced apart from the axis of the pivot shaft. The rotating shaft can rotate relative to the frame and the adjusting member around its own axis, and when the adjusting member rotates around the axis of the pivot shaft, the second end of the rotating shaft is driven to rotate synchronously around the axis of the pivot shaft. In the printing device provided by the utility model, when the second end of the rotating shaft rotates relative to the frame along with the adjusting member about the axis of the pivot shaft, it drives the print head bracket and the thermal print head to move relative to the frame, thereby adjusting the parallelism of the thermal print head's print line with the generatrix of the print roller. This ensures that the print line of the thermal print head is parallel to the generatrix of the print roller, thereby balancing the pressure between the ends of the print line and the print roller, thereby ensuring printing quality. Furthermore, when the rotating shaft rotates relative to the frame and the adjusting member about its own axis, it drives the thermal print head toward or away from the print roller via the print head bracket, thereby adjusting the distance between the print line of the thermal print head and the print roller along the thickness direction of the sheet media, thereby accommodating sheet media of varying thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a first structural diagram of the printing device provided in the first embodiment of the present utility model;
[0018] Figure 2 This is a second structural diagram of the printing device provided in the first embodiment of the present utility model;
[0019] Figure 3 This is a schematic diagram of a first partial structure of a printing device provided in the first embodiment of the present utility model;
[0020] Figure 4 This is a partial structural exploded view of the printing device provided in the first embodiment of the present utility model;
[0021] Figure 5 This is a schematic diagram of a second partial structure of the printing device provided in the first embodiment of the present utility model;
[0022] Figure 6 This is a partial structural exploded view of a printing assembly in a printing device provided in Example 1 of the present utility model;
[0023] Figure 7 yes Figure 2 A magnified view of the structure at point A;
[0024] Figure 8This is a third partial structural diagram of the printing device provided in the first embodiment of the present utility model;
[0025] Figure 9 This is a partial structural exploded view of the printing device provided in the second embodiment of the present utility model;
[0026] Figure 10 It is a partial structural diagram of the printing device provided in the second embodiment of the present utility model.
[0027] In the picture:
[0028] 1-frame; 11-first support plate; 12-second support plate; 121-first threaded hole; 122-avoidance hole; 123-second threaded hole; 124-limiting groove; 125-mounting hole; 13-third support plate;
[0029] 2 - adjustment assembly; 21 - adjustment member; 211 - adjustment plate; 201 - support hole; 202 - annular long hole; 203 - pivot hole; 204 - drive long hole; 212 - operating member; 205 - knob; 206 - drive shaft; 22 - bearing; 23 - first fastener; 24 - indicator; 25 - scale line;
[0030] 3-printing assembly; 31-printing rubber roller; 32-print head bracket; 321-bar hole; 33-thermal print head; 34-rotating shaft; 341-milling plane; 342-third threaded hole; 35-third fastener; 36-elastic member; 37-connecting shaft; 38-locking portion; 39-locking member; 30-pressure adjustment member;
[0031] 4- pivot shaft; 5- positioning assembly; 51- clamping column; 52- clamping slot. DETAILED DESCRIPTION
[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.
[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0035] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0036] Example 1
[0037] Figure 1 This is a first structural diagram of the printing device provided in the first embodiment of the present utility model. Figure 2 This is a second structural diagram of the printing device provided in the first embodiment of the present utility model. Figure 3 This is a schematic diagram of a first partial structure of a printing device provided in the first embodiment of the present invention. Figure 4 This is a partial structural exploded view of the printing device provided in the first embodiment of the present invention. Figure 5 This is a second partial structural diagram of the printing device provided in the first embodiment of the present invention. Figure 6 This is a partial structural exploded view of the printing assembly 3 in the printing device provided in the first embodiment of the present invention. Figure 7 yes Figure 2 A magnified view of the structure at point A in the middle. Figure 8 This is a schematic diagram of the third partial structure of the printing device provided in the first embodiment of the present utility model. Figures 1 to 8As shown, this embodiment provides a printing device, which includes a frame 1, an adjustment assembly 2 and a printing assembly 3. The adjustment assembly 2 includes an adjustment member 21, which is pivotally connected to the frame 1 via a pivot shaft 4 and can rotate relative to the frame 1 around the axis of the pivot shaft 4. The printing assembly 3 includes a printing roller 31, a print head bracket 32, a thermal print head 33 and a rotating shaft 34. The printing roller 31 is rotatably arranged on the frame 1, the print head bracket 32 is connected to the rotating shaft 34, and the thermal print head 33 is mounted on the print head bracket 32. The thermal print head 33 is used to cooperate with the printing roller 31. A first end of the rotating shaft 34 is supported by the frame 1, and a second end of the rotating shaft 34 is supported by the adjustment member 21. The second end of the rotating shaft 34 is spaced apart from the axis of the pivot shaft 4. The rotating shaft 34 can rotate around its own axis relative to the frame 1 and the adjustment member 21. When the adjustment member 21 rotates around the axis of the pivot shaft 4, the second end of the rotating shaft 34 is driven to rotate synchronously around the axis of the pivot shaft 4. In the printing device provided in this embodiment, when the second end of the rotating shaft 34 rotates relative to the frame 1 about the axis of the pivot axis 4 along with the adjusting member 21, it drives the print head bracket 32 and the thermal print head 33 to move relative to the frame 1, thereby adjusting the parallelism of the printing line of the thermal print head 33 with the generatrix of the print roller 31. This ensures that the printing line of the thermal print head 33 is parallel to the generatrix of the print roller 31, thereby balancing the pressure between the ends of the printing line and the print roller 31, thereby ensuring effective printing. Furthermore, when the rotating shaft 34 rotates about its own axis relative to the frame 1 and the adjusting member 21, it drives the thermal print head 33 toward or away from the print roller 31 via the print head bracket 32, thereby adjusting the distance between the printing line of the thermal print head 33 and the print roller 31 along the thickness direction of the sheet media, thereby accommodating sheet media of varying thicknesses.
[0038] Preferably, if Figure 5 As shown, the frame 1 is provided with a shaft hole, and the adjustment assembly 2 further includes a bearing 22. The outer ring of the bearing 22 is inserted into the shaft hole, and the first end of the rotating shaft 34 is rotatably inserted into the inner ring of the bearing 22, with the first end of the rotating shaft 34 and the inner ring of the bearing 22 having a clearance fit. This arrangement allows the axis of the rotating shaft 34 to deflect by a set angle relative to the axis of the bearing 22, thereby allowing the second end of the rotating shaft 34 to rotate relative to the frame 1 about the axis of the pivot shaft 4.
[0039] In this embodiment, if Figure 3 and Figure 4As shown, the adjustment member 21 includes an adjustment plate 211, which is pivotally connected to the frame 1 through the pivot shaft 4. The adjustment plate 211 is provided with a support hole 201, and the second end of the rotating shaft 34 is rotatably plugged into the support hole 201. One of the frame 1 and the adjustment plate 211 is provided with a first threaded hole 121, and the other of the frame 1 and the adjustment plate 211 is provided with an annular long hole 202, the center of the annular long hole 202 is located on the axis of the pivot shaft 4, and the adjustment assembly 2 also includes a first fastener 23, which passes through the annular long hole 202 and is threadedly connected to the first threaded hole 121 for locking the position of the adjustment plate 211 relative to the frame 1. When it is necessary to adjust the parallelism between the printing line of the thermal print head 33 and the generatrix of the print roller 31, the first fastener 23 is loosened to rotate the adjustment plate 211 about the axis of the pivot shaft 4. When the adjustment plate 211 rotates, the second end of the rotating shaft 34 drives the print head bracket 32 and the thermal print head 33 to move relative to the frame 1 to adjust the parallelism between the printing line of the thermal print head 33 and the generatrix of the print roller 31. Finally, the first fastener 23 is tightened to lock the position of the adjustment member 21 relative to the frame 1, so that the rotating shaft 34 is reliably maintained in the adjusted position, thereby improving the printing stability of the thermal print head 33.
[0040] Alternatively, as Figure 3 and Figure 4 As shown, the frame 1 is provided with a limiting slot 124, into which the adjustment plate 211 is embedded. The limiting slot 124 is used to limit the angle of rotation of the adjustment plate 211 relative to the frame 1 about the axis of the pivot shaft 4. This arrangement ensures that the adjustment plate 211 can only rotate within a set angle range, thereby improving the adjustment reliability of the adjustment assembly 2.
[0041] In this embodiment, if Figures 1 to 4 As shown, the frame 1 includes a first support plate 11 and a second support plate 12 that are positioned opposite and spaced apart. The print head bracket 32 is positioned between the first support plate 11 and the second support plate 12. The first end of the rotating shaft 34 is supported by the first support plate 11. The adjustment plate 211 is positioned on the side of the second support plate 12 that faces away from the first support plate 11 and is pivotally connected to the second support plate 12. The annular elongated hole 202 is provided in the adjustment plate 211, and the first threaded hole 121 is provided in the second support plate 12. This arrangement allows the adjustment plate 211 to be positioned outside the second support plate 12. After the first fastener 23 is loosened, the adjustment plate 211 can be directly rotated and adjusted, making operation convenient.
[0042] Preferably, if Figure 4 As shown, the second support plate 12 is further provided with an avoidance hole 122 opposite to the support hole 201 , and the second end of the rotating shaft 34 passes through the avoidance hole 122 and is plugged into the support hole 201 .
[0043] Preferably, if Figure 3As shown, the adjustment assembly 2 further includes an indicator portion 24 and a plurality of scale lines 25. The plurality of scale lines 25 are provided on one of the adjustment plate 211 and the second support plate 12, and the indicator portion 24 is provided on the other. When the adjustment plate 211 rotates relative to the second support plate 12 about the axis of the pivot shaft 4, the indicator portion 24 can be aligned with each of the plurality of scale lines 25 to indicate the position of the adjustment member 21 relative to the second support plate 12. In this embodiment, the plurality of scale lines 25 are provided on the second support plate 12, and the indicator portion 24 is provided on the adjustment plate 211. In other embodiments, the plurality of scale lines 25 are provided on the adjustment plate 211, and the indicator portion 24 is provided on the second support plate 12.
[0044] Alternatively, as Figure 4 As shown, the pivot shaft 4 serves as a second fastener. The adjustment plate 211 is further provided with a pivot hole 203, the outer diameter of which is compatible with the second fastener. The second support plate 12 is further provided with a second threaded hole 123, through which the second fastener passes and is threadedly connected. The adjustment plate 211 is pivotally connected to the second support plate 12 via the second fastener and can rotate relative to the second support plate 12 about the axis of the second fastener. The adjustment plate 211 is pivotally connected to the second support plate 12 via the second fastener and can rotate relative to the second support plate 12 about the axis of the second fastener, facilitating the installation of the adjustment plate 211. In other embodiments, the pivot shaft 4 is fixedly disposed on one of the adjustment plate 211 and the second support plate 12, and the other of the adjustment plate 211 and the second support plate 12 is provided with a pivot hole 203, with the pivot shaft 4 being rotatably plugged into the pivot hole 203.
[0045] In this embodiment, if Figure 4 and Figure 6 As shown, the rotating shaft 34 is provided with a milled flat surface 341, the print head holder 32 is provided with a strip hole 321 extending in the direction of movement of the sheet medium, and the milled flat surface 341 is provided with a third threaded hole 342 extending radially along the rotating shaft 34. The printing assembly 3 also includes a third fastener 35, which passes through the strip hole 321 and is threadedly connected to the third threaded hole 342 to lock the position of the print head holder 32 relative to the rotating shaft 34. This arrangement allows the position of the print head holder 32 relative to the rotating shaft 34 along the direction of movement of the sheet medium to be adjusted after loosening the third fastener 35, thereby adjusting the position of the print line of the thermal print head 33 relative to the print roller 31, thereby improving print quality. After tightening the third fastener 35, the position of the print head holder 32 relative to the rotating shaft 34 is locked, making operation convenient.
[0046] like Figure 2 、 Figure 7 and Figure 8As shown, the printing device also includes a positioning component 5, which includes two first clamping parts and two second clamping parts. The two first clamping parts are both arranged on the frame 1 and are respectively adjacent to the two axial ends of the printing rubber roller 31. The two second clamping parts are both arranged on the print head bracket 32, and the two second clamping parts are respectively located at the two ends of the thermal print head 33. Among them, the first clamping part is one of the card slot 52 and the card column 51, and the second clamping part is the other of the card slot 52 and the card column 51. The two card slots 52 are clamped and matched with the two card columns 51 in a one-to-one correspondence. When installing the print head bracket 32, first loosen the third fastener 35, engage the slot 52 with the post 51, and then tighten the third fastener 35. Since the two first engaging portions are fixed relative to the print roller 31, and the two second engaging portions are fixed relative to the thermal print head 33, the one-to-one engagement of the two slots 52 with the two posts 51 allows for high positioning accuracy of the thermal print head 33 and the print roller 31. The engagement of the slots 52 with the posts 51 accurately controls the adjustment of the print head bracket 32 relative to the rotation shaft 34 along the direction of sheet media movement, improving adjustment efficiency and accuracy, and further enhancing print quality. Optionally, in this embodiment, the first engaging portion is the post 51, and the second engaging portion is the slot 52. In other embodiments, the first engaging portion is the slot 52, and the second engaging portion is the post 51.
[0047] Alternatively, as Figure 2 and Figure 7 As shown, the frame 1 also includes a third support plate 13 opposite to and spaced from the first support plate 11. The two ends of the printing rubber roller 31 are supported by the first support plate 11 and the third support plate 13 respectively, and the two clamping columns 51 are respectively arranged on the first support plate 11 and the third support plate 13.
[0048] Alternatively, as Figure 5 and Figure 6 As shown, the printing assembly 3 further includes an elastic member 36, which is used to ensure that the print head bracket 32 always rotates around the axis of the rotating shaft 34 and drives the thermal print head 33 away from the printing roller 31. Preferably, the elastic member 36 is a torsion spring sleeved on the rotating shaft 34.
[0049] Alternatively, as Figure 1 and Figure 2As shown, the printing assembly 3 also includes a connecting shaft 37, a locking portion 38, a locking piece 39 and a pressure regulating piece 30. The two ends of the connecting shaft 37 are supported by the first support plate 11 and the second support plate 12 respectively, and the connecting shaft 37 can rotate around its own axis. The locking portion 38 is fixedly arranged on the third support plate 13. The pressure regulating piece 30 and the locking piece 39 are both fixedly connected to the connecting shaft 37. The pressure regulating piece 30 is used to provide pressure to the print head bracket 32 so that the thermal print head 33 presses the sheet medium to the print rubber roller 31. When the locking piece 39 rotates around the axis of the connecting shaft 37 relative to the frame 1, the pressure regulating piece 30 is driven to rotate synchronously around the axis of the connecting shaft 37 through the connecting shaft 37. When the locking piece 39 rotates around the axis of the connecting shaft 37, the locking piece 39 has a locking function. When the locking member 39 is rotated to the locked position, the pressure regulating member 30 rotates with the locking member 39 around the axis of the connecting shaft 37 and drives the print head bracket 32 to rotate around the axis of the rotating shaft 34, so that the card slot 52 is engaged with the card column 51, and the thermal print head 33 is relatively matched with the printing rubber roller 31, and the locking member 39 is engaged with the locking part 38 and prevents the locking member 39 from continuing to rotate; when the locking member 39 is rotated to the unlocked position, the locking member 39 is separated from the locking part 38, the pressure regulating member 30 rotates with the locking member 39 around the axis of the connecting shaft 37, and the print head bracket 32 rotates around the axis of the rotating shaft 34 under the action of the elastic member 36, so that the card slot 52 is separated from the card column 51, and the thermal print head 33 is separated from the printing rubber roller 31.
[0050] Example 2
[0051] Figure 9 This is a partial structural exploded view of the printing device provided in the second embodiment of the present invention. Figure 10 This is a partial structural diagram of the printing device provided in the second embodiment of the present utility model. Figure 9 and Figure 10 As shown, the printing device provided in this embodiment is basically the same as that in the first embodiment. The difference between the printing device provided in this embodiment and the first embodiment is that:
[0052] An annular elongated hole 202 is provided in the second support plate 12, and a first threaded hole 121 is provided in the adjustment plate 211. The adjustment member 21 also includes an operating member 212, which is connected to the adjustment plate 211 and extends through the second support plate 12 to the side of the second support plate 12 facing away from the first support plate 11. This arrangement allows the adjustment plate 211 to be positioned on the inner side of the second support plate 12. By operating the operating member 212, which extends to the outer side of the second support plate 12, the adjustment plate 211 can be driven to rotate about the axis of the pivot shaft 4, thereby adjusting the parallelism between the print line of the thermal print head 33 and the print roller 31. Preferably, the second support plate 12 is provided with two annular elongated holes 202 at intervals, and the adjustment plate 211 is provided with two corresponding first threaded holes 121. The adjustment assembly 2 includes two first fasteners 23, which respectively pass through the two annular elongated holes 202 and are threadedly connected to the two first threaded holes 121, further improving the positional stability of the adjustment plate 211 relative to the second support plate 12.
[0053] In this embodiment, if Figure 9 and Figure 10 As shown, the pivot shaft 4 is fixedly connected to the adjustment plate 211 , and the second support plate 12 is provided with a pivot hole 203 . The pivot shaft 4 is rotatably plugged into the pivot hole 203 , so that the adjustment plate 211 is pivotally connected to the second support plate 12 via the pivot shaft 4 .
[0054] Optionally, in this embodiment, if Figure 9 and Figure 10 As shown, the second support plate 12 is provided with a mounting hole 125, the adjustment plate 211 is provided with a driving long hole 204, the operating member 212 includes a knob 205 and a driving shaft 206 connected to the knob 205, the knob 205 and the driving shaft 206 are eccentrically arranged, the knob 205 is plugged into the mounting hole 125, and the knob 205 can rotate around its own axis, the driving shaft 206 is plugged into the driving long hole 204, and the outer diameter of the driving shaft 206 is adapted to the width of the driving long hole 204, when the knob 205 rotates around its own axis, the driving shaft 206 drives the adjusting plate 211 to rotate around the axis of the pivot shaft 4.
[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A printing device, characterized in that: The invention comprises a frame (1), an adjusting assembly (2) and a printing assembly (3), wherein the adjusting assembly (2) comprises an adjusting member (21), and the adjusting member (21) is pivotally connected to the frame (1) via a pivot shaft (4) and can rotate relative to the frame (1) around the axis of the pivot shaft (4); The printing assembly (3) comprises a printing rubber roller (31), a printing head bracket (32), a thermal printing head (33) and a rotating shaft (34); the printing rubber roller (31) is rotatably arranged on the frame (1); the printing head bracket (32) is connected to the rotating shaft (34); the thermal printing head (33) is installed on the printing head bracket (32); the thermal printing head (33) is used to cooperate with the printing rubber roller (31); the first end of the rotating shaft (34) The first end of the rotating shaft (34) is supported by the frame (1), the second end of the rotating shaft (34) is supported by the adjusting member (21), the second end of the rotating shaft (34) is spaced apart from the axis of the pivot shaft (4), the rotating shaft (34) can rotate around its own axis relative to the frame (1) and the adjusting member (21), and when the adjusting member (21) rotates around the axis of the pivot shaft (4), the second end of the rotating shaft (34) is driven to rotate synchronously around the axis of the pivot shaft (4).
2. The printing device according to claim 1, wherein The adjusting member (21) includes an adjusting plate (211), the adjusting plate (211) is pivotally connected to the frame (1) through the pivot shaft (4), the adjusting plate (211) is provided with a support hole (201), the second end of the rotating shaft (34) is rotatably plugged into the support hole (201), one of the frame (1) and the adjusting plate (211) is provided with a first threaded hole (121), the other of the frame (1) and the adjusting plate (211) is provided with an annular long hole (202), the center of the annular long hole (202) is located on the axis of the pivot shaft (4), and the adjusting assembly (2) also includes a first fastener (23), the first fastener (23) passes through the annular long hole (202) and is threadedly connected to the first threaded hole (121), and is used to lock the position of the adjusting plate (211) relative to the frame (1).
3. The printing device according to claim 2, wherein: The frame (1) is provided with a limiting groove (124), the adjustment plate (211) is embedded in the limiting groove (124), and the limiting groove (124) is used to limit the angle of rotation of the adjustment plate (211) relative to the frame (1) around the axis of the pivot shaft (4).
4. The printing device according to claim 2, wherein: The frame (1) comprises a first support plate (11) and a second support plate (12) which are arranged opposite to each other and spaced apart, the print head bracket (32) is located between the first support plate (11) and the second support plate (12), the first end of the rotating shaft (34) is supported by the first support plate (11), the adjustment plate (211) is located on a side of the second support plate (12) away from the first support plate (11), and the adjustment plate (211) is pivotally connected to the second support plate (12); wherein the annular long hole (202) is provided on the adjustment plate (211), and the first threaded hole (121) is provided on the second support plate (12).
5. The printing device according to claim 4, characterized in that The pivot shaft (4) is a second fastener, the adjustment plate (211) is further provided with a pivot hole (203), the outer diameter of the pivot hole (203) is adapted to the second fastener, the second support plate (12) is further provided with a second threaded hole (123), the second fastener passes through the pivot hole (203) and is threadedly connected to the second threaded hole (123), the adjustment plate (211) is pivotally connected to the second support plate (12) via the second fastener, and can rotate relative to the second support plate (12) around the axis of the second fastener.
6. The printing device according to claim 2, wherein: The frame (1) comprises a first support plate (11) and a second support plate (12) which are arranged opposite to each other and spaced apart, the print head bracket (32) is located between the first support plate (11) and the second support plate (12), the first end of the rotating shaft (34) is supported by the first support plate (11), the adjustment plate (211) is located on a side of the second support plate (12) opposite to the first support plate (11), and the adjustment plate (211) is pivotally connected to the second support plate (12); wherein the annular long hole (202) is provided on the second support plate (12), and the first threaded hole (121) is provided on the adjustment plate (211); the adjustment member (21) further comprises an operating member (212), the operating member (212) is connected to the adjustment plate (211), and the operating member (212) passes through the second support plate (12) and extends to a side of the second support plate (12) facing away from the first support plate (11).
7. The printing device according to claim 6, characterized in that The pivot shaft (4) is fixedly connected to the adjustment plate (211); the second support plate (12) is provided with a pivot hole (203); the pivot shaft (4) and the pivot hole (203) are rotatably plugged in.
8. The printing device according to claim 7, wherein: The second support plate (12) is provided with a mounting hole (125), the adjustment plate (211) is provided with a driving long hole (204), the operating member (212) comprises a knob (205) and a driving shaft (206) connected to the knob (205), the knob (205) and the driving shaft (206) are eccentrically arranged, the knob (205) is plugged into the mounting hole (125), and the knob (205) can rotate around its own axis, the driving shaft (206) is plugged into the driving long hole (204), and the outer diameter of the driving shaft (206) is adapted to the width of the driving long hole (204), and when the knob (205) rotates around its own axis, the driving shaft (206) is driven to drive the adjustment plate (211) to rotate around the axis of the pivot shaft (4).
9. The printing device according to any one of claims 1 to 8, characterized in that: The rotating shaft (34) is provided with a milling plane (341), the printing head support (32) is provided with a strip hole (321) extending along the moving direction of the sheet medium, the milling plane (341) is provided with a third threaded hole (342) extending along the radial direction of the rotating shaft (34), and the printing component (3) further includes a third fastener (35), the third fastener (35) passes through the strip hole (321) and is threadedly connected to the third threaded hole (342) for locking the position of the printing head support (32) relative to the rotating shaft (34).
10. The printing device according to claim 9, wherein: The printing device further comprises a positioning assembly (5), the positioning assembly (5) comprising two first clamping parts and two second clamping parts, the two first clamping parts are both arranged on the frame (1) and the two first clamping parts are respectively adjacent to the two axial ends of the printing rubber roller (31), the two second clamping parts are both arranged on the print head bracket (32), and the two second clamping parts are respectively located at the two ends of the thermal print head (33), wherein the first clamping part is one of the card slot (52) and the card column (51), the second clamping part is the other of the card slot (52) and the card column (51), and the two card slots (52) are clamped and matched with the two card columns (51) in a one-to-one correspondence.