Circumferential structure thermal transfer printing mechanism and thermal transfer printer with same
Through the peripheral structure thermal transfer printing mechanism, multiple printhead components share printing rollers and large-angle arc paper-moving film, solving the problems of large volume and low overprinting accuracy of traditional thermal transfer printer equipment, and through an integrated carbon tape box The design simplifies carbon tape replacement, achieving efficient printing accuracy and operational ease.
Patent Information
- Application Number
- CN202411636022.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2024-12-31
AI Technical Summary
Due to multiple printing rollers, traditional thermal transfer printers have large equipment size and low overprinting accuracy, and the carbon tape replacement operation is cumbersome.
The circumferential structure thermal transfer printing mechanism is adopted, and a printing roller is shared by multiple printhead components, combining a large angle arc paper-moving film and an integrated carbon tape box design to achieve accurate overprinting and simplified carbon tape replacement.
Improves overprinting accuracy, reduces the printer volume, simplifies the structure, and facilitates the replacement of the carbon tape.
Smart Images
Figure CN119217864A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of printer equipment, and in particular to a circumferential structure thermal transfer printing mechanism and a thermal transfer printer having the same. Background Art
[0002] Thermal transfer printing technology is widely used in printing fields such as outdoor signs, labels, and tickets.
[0003] Traditional thermal transfer printers usually use multiple print rollers, which not only makes the equipment bulky, but also makes it difficult to accurately control the relative positions of the print rollers when printing in multiple colors, resulting in low overprinting accuracy. In addition, the ribbon reel is usually designed independently, making it more complicated to replace the ribbon roll.
[0004] Based on this, it is necessary to develop a circumferential structure thermal transfer printing mechanism and a thermal transfer printer having the same to overcome the above technical problems. Summary of the invention
[0005] The technical problem to be solved by the present invention is to provide a circumferential structure thermal transfer printing mechanism and a thermal transfer printer having the same, which effectively overcomes the defects of the prior art.
[0006] The technical solution of the present invention to solve the above technical problems is as follows:
[0007] A circular structure thermal transfer printing mechanism comprises a printing roller, a plurality of printing head assemblies and a plurality of integrated carbon ribbon cartridges, wherein the printing roller is rotatably mounted on the upper end of a printer frame, and the two ends of the printing roller respectively pass through two mounting side plates spaced apart from each other on the upper end of the printer frame, guide rollers parallel to the printing roller are symmetrically arranged on both sides of the vertex of the lower arc of the printing roller, the guide rollers are rotatably assembled with the mounting side plates, the printing head assembly is mounted between the two mounting side plates, and the plurality of printing head assemblies are respectively distributed around the printing roller except the bottom at equal intervals along the circumferential direction, the outer periphery of the printing roller is coated with a paper feeding film, the two ends of the paper feeding film respectively bypass the sides where the two guide rollers are close to each other, and move away from each other on the lower sides, the plurality of integrated carbon ribbon cartridges are respectively arranged at the plurality of printing head assemblies in a one-to-one correspondence, the integrated carbon ribbon cartridge is mounted on one mounting side plate, extends between the two mounting side plates, and can be pulled out or loaded from one mounting side plate.
[0008] Based on the above technical solution, the present invention can also be improved as follows.
[0009] Furthermore, the above-mentioned print head assembly is provided with six.
[0010] Furthermore, the six print head assemblies are symmetrically distributed along a vertical line passing through the center of the print roller.
[0011] Furthermore, a central angle of a circle of a region covered by the paper feeding film on the surface of the printing roller is α, and 270°≤α.
[0012] Furthermore, the above-mentioned α=315°.
[0013] Furthermore, the center angle formed by the centers of two adjacent print head assemblies and the center of the print roller is β, and β=45°.
[0014] Furthermore, the above-mentioned integrated carbon ribbon box includes a C-shaped box body and two carbon ribbon rolls, the above-mentioned box body includes a straight main box body and two straight assembly grooves vertically arranged on one side of the above-mentioned main box body, the cross-section of the above-mentioned assembly groove is arc-shaped, and the openings of the two assembly grooves are in the same direction, one end of the above-mentioned assembly groove is provided with an elastic pressure head, and the other end of the above-mentioned assembly groove is provided with a fixed pressure head, the above-mentioned carbon ribbon roll is placed in the above-mentioned assembly groove, and its two ends are respectively detachably connected to the above-mentioned elastic pressure head and the fixed pressure head, and assembled and matched with each other, the two assembly grooves of the above-mentioned box body can pass through the matching assembly holes on one side of the mounting side plate, and extend to the corresponding two sides of the above-mentioned print head assembly, or be pulled out from the above-mentioned assembly hole for removal.
[0015] Further, the above-mentioned elastic pressure head includes a fixed seat, an elastic member and a first limiting disc, the above-mentioned fixed seat is assembled at one end of the above-mentioned assembly groove, the above-mentioned first limiting disc is arranged at one end of the above-mentioned assembly groove and is close to the above-mentioned fixed seat, one end of the above-mentioned first limiting disc is provided with a columnar first connecting part rotatably assembled with it, the above-mentioned elastic member is connected between the above-mentioned first connecting part and the above-mentioned fixed seat, and the other end of the above-mentioned first limiting disc is coaxially provided with a first cylindrical convex head inserted into the end part of the above-mentioned carbon ribbon roll; the above-mentioned fixed pressure head includes a columnar second connecting part and a second limiting disc, one end of the above-mentioned second connecting part is rotatably assembled with the other end of the above-mentioned assembly groove, the above-mentioned second limiting disc is assembled at the other end of the above-mentioned second connecting part, and the end of the above-mentioned second limiting disc away from the above-mentioned second connecting part is coaxially provided with a second cylindrical convex head inserted into the end part of the above-mentioned carbon ribbon roll, the above-mentioned first cylindrical convex head and the second cylindrical convex head are coaxially distributed, and the two ends of the above-mentioned carbon ribbon roll are respectively inserted into the corresponding first cylindrical convex head and second cylindrical convex head.
[0016] Furthermore, both sides of the ends of the first cylindrical protrusion and the second cylindrical protrusion are respectively provided with limiting protrusions, and both ends of the carbon ribbon roll are respectively provided with snap-fitting holes engaged with the limiting protrusions.
[0017] The beneficial effects of the present invention are as follows: the structural design is reasonable and ingenious, and a method of using a plurality of print head assemblies to share a print roller is adopted to realize single or multiple transfers of the print medium, which greatly improves the overprint accuracy; at the same time, the large-angle arc-shaped paper film path can make the photo paper more closely cover the print roller, and the structure greatly improves the space utilization rate, simplifies the printing structure, and reduces the overall size of the printer; in addition, the integrated design of the carbon ribbon box solves the problem of inconvenient carbon ribbon replacement caused by insufficient space, and replacement is very convenient and quick.
[0018] A thermal transfer printer is also provided, comprising a thermal transfer printing mechanism with a circumferential structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the circumferential structure thermal transfer printing mechanism of the present invention;
[0020] Figure 2 It is a distribution diagram of the printing roller, the printing head assembly and the integrated carbon ribbon box in the circumferential structure thermal transfer printing mechanism of the present invention;
[0021] Figure 3 It is an assembly diagram of a print head assembly and an integrated carbon ribbon box in a circumferential structure thermal transfer printing mechanism of the present invention;
[0022] Figure 4 It is a structural schematic diagram of an integrated carbon ribbon box in a circumferential structure thermal transfer printing mechanism of the present invention;
[0023] Figure 5 It is a schematic structural diagram of a circular structure thermal transfer printing mechanism of the present invention after removing a carbon ribbon roll from the integrated carbon ribbon box;
[0024] Figure 6 It is a schematic structural diagram of a print head assembly in a circumferential structure thermal transfer printing mechanism of the present invention.
[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0026] 1. Print roller; 2. Print head assembly; 3. Integrated ribbon cassette; 4. Guide roller; 5. Paper feed film; 31. Box body; 32. Ribbon roll; 33. Elastic pressure head; 34. Fixed pressure head; 331. Fixed seat; 332. Elastic member; 333. First limiting disc; 334. First connecting part; 335. First cylindrical protrusion; 341. Second connecting part; 342. Second limiting disc; 343. Second cylindrical protrusion. DETAILED DESCRIPTION
[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0028] Example 1
[0029] like Figure 1 , 2 As shown, the circumferential structure thermal transfer printing mechanism of this embodiment includes a printing roller 1, a plurality of print head assemblies 2 and a plurality of integrated carbon ribbon boxes 3. The printing roller 1 is rotatably mounted on the upper end of the printer frame, and its two ends respectively pass through two mounting side plates spaced apart from each other on the upper end of the printer frame. Guide rollers 4 parallel to the printing roller 1 are symmetrically arranged on both sides of the lower arc vertex of the printing roller 1. The guide rollers 4 are rotatably assembled with the mounting side plates. The printing head assembly 2 is mounted between the two mounting side plates (specifically, mounted on one or both mounting side plates). The plurality of print head assemblies 2 are respectively distributed around the printing roller 1 at equal intervals along the circumferential direction except the bottom. The outer circumference of the printing roller 1 is covered with a paper feeding film 5. The two ends of the paper feeding film 5 are respectively bypassed by the sides of the two guide rollers 4 that are close to each other, and move away from each other on the lower sides. The plurality of integrated carbon ribbon boxes 3 are respectively arranged at the plurality of print head assemblies 2 in a one-to-one correspondence. The integrated carbon ribbon boxes 3 are installed on one side of the mounting side plate, and extend between the two mounting side plates, and can be pulled out or loaded from one side of the mounting side plate.
[0030] In the circumferential structure thermal transfer printing mechanism of this embodiment, Figure 1 As shown, the printer frame includes a supporting frame body at the bottom and two vertically spaced and parallel mounting side plates installed on the upper end of the supporting frame body. Both ends of the printing roller 1 vertically pass through the holes in the middle of the two mounting side plates, and bearing seats are respectively installed at both ends. The bearing seats are installed on the upper end of the supporting frame body through supporting columns. Multiple print head assemblies 2 are installed between the mounting side plates on both sides and assembled with the side plates. An integrated carbon ribbon box 3 is installed on one side of the mounting side plate and can be pulled out or assembled. After assembly, the main part of the integrated carbon ribbon box 3 is located at the print head assembly 2, and the carbon ribbon roll cooperates with the print head assembly 2 after being pulled out.
[0031] In this embodiment, a printing method is adopted in which multiple print head assemblies 2 share a printing roller 1. The printing roller 1 rotates in the circumferential direction, avoiding the difference between the use of multiple printing rollers, realizing single or multiple transfers of the printing medium, and greatly improving the overprinting accuracy; at the same time, a circular layout is adopted, with high integration and a large-angle paper film path (that is, paper film 5) design, which shortens the length of the printer's paper film path, and the overall structure is more streamlined, greatly improving space utilization, simplifying the printing structure, reducing the overall size of the printer, and also reducing transportation costs. In addition, the traditional carbon ribbon retractable roll is made into an integrated carbon ribbon box, which can be taken out as a whole and then the carbon ribbon roll can be replaced by oneself, which not only solves this problem, but also simplifies the operation.
[0032] It should be noted that: in this embodiment, one of the guide rollers 4 is coated with a rubber layer on the outside, mainly used to pull the paper film 5, and the other guide roller 4 is not provided with a rubber layer on the surface, and is mainly used to guide the paper film 5 in transition.
[0033] In this embodiment, the number of the print head assemblies 2 is preferably six.
[0034] In this embodiment, the six print head assemblies 2 are symmetrically distributed along a vertical line passing through the center of the print roller 1 .
[0035] In this embodiment, the center angle of the area covered by the paper feeding film 5 on the surface of the printing roller 1 is α, and 270°≤α, thus realizing a large-angle paper feeding film path design.
[0036] Optimally, the above α=315°.
[0037] In this embodiment, the center angle formed by the center of two adjacent print head assemblies 2 and the center of the print roller 1 is β, and β = 45°. The distribution of the print head assemblies 2 is adapted to the paper and film path, covering the entire path of the paper and film path.
[0038] As a preferred embodiment, Figure 3 , 4 As shown in Figures 5 and 6, the integrated carbon ribbon box 3 includes a C-shaped box body 31 and two carbon ribbon rolls 32. The box body 31 includes a straight main box body and two straight assembly grooves vertically arranged on one side of the main box body. The cross-section of the assembly groove is arc-shaped, and the openings of the two assembly grooves are in the same direction. An elastic pressure head 33 is provided at one end of the assembly groove, and a fixed pressure head 34 is provided at the other end of the assembly groove. The carbon ribbon roll 32 is placed in the assembly groove, and its two ends are detachably connected to the elastic pressure head 33 and the fixed pressure head 34 respectively, and assembled with each other. The two assembly grooves of the box body 31 can pass through the matching assembly holes on the mounting side plate on one side, and extend to the corresponding two sides of the print head assembly 2, or be pulled out from the assembly hole for removal.
[0039] In the above embodiment, two carbon ribbon rolls 32 (one for winding and one for unwinding) are loaded into the carbon ribbon box 3, and the whole is extended from the assembly hole on one side of the printer frame until the C-shaped main box body of the carbon ribbon box 3 is attached to one side of the printer frame, and the two are assembled and connected, and two parallel assembly grooves are extended into the printer frame and located on both sides of the print head assembly 2, and then the unwinding carbon ribbon is pulled out to bypass the adapting part of the print head assembly 2, and then wound on the other carbon ribbon roll. When replacement is required, the carbon ribbon roll is separated from the print head assembly 2, and then pulled out as a whole from the assembly hole on one side of the printer frame, which is very convenient.
[0040] As a preferred embodiment, the elastic pressure head 33 includes a fixed seat 331, an elastic member 332 and a first limiting disc 333. The fixed seat 331 is assembled at one end of the assembly groove. The first limiting disc 333 is arranged at one end of the assembly groove and is close to the fixed seat 331. One end of the first limiting disc 333 is provided with a columnar first connecting portion 334 rotatably assembled therewith. The elastic member 332 is connected between the first connecting portion 334 and the fixed seat 331. The other end of the first limiting disc 333 is coaxially provided with a first cylindrical convex head 333 inserted into the end of the carbon ribbon roll 32. 5; The fixed pressure head 34 includes a columnar second connecting portion 341 and a second limiting disc 342, one end of the second connecting portion 341 is rotatably assembled with the other end of the assembly groove, the second limiting disc 342 is installed on the other end of the second connecting portion 341, and the end of the second limiting disc 342 away from the second connecting portion 341 is coaxially provided with a second cylindrical boss 343 inserted into the end of the carbon ribbon roll 32, the first cylindrical boss 335 and the second cylindrical boss 343 are coaxially distributed, and the two ends of the carbon ribbon roll 32 are respectively inserted into the corresponding first cylindrical boss 335 and second cylindrical boss 343.
[0041] In the above implementation scheme, the two ends of the carbon ribbon are respectively inserted into the first cylindrical protrusion 335 and the second cylindrical protrusion 343. When it needs to be removed, external force is applied to the first limiting disk 333 to compress the elastic member 332 so that the first cylindrical protrusion 335 withdraws from the end of the carbon ribbon roll. Then, the carbon ribbon roll can be removed and similar operations can be performed when it is installed, which is very quick and convenient.
[0042] In this embodiment, both sides of the ends of the first cylindrical protrusion 335 and the second cylindrical protrusion 343 are respectively provided with limiting protrusions, and both ends of the carbon ribbon roll 32 are respectively provided with snap-fits engaged with the limiting protrusions to ensure that the first cylindrical protrusion 335 and the second cylindrical protrusion 343 are tightly matched with the ends of the carbon ribbon roll 32.
[0043] In this embodiment, the print head assembly 2 belongs to the patented technology, and the specific structure is as follows:
[0044] like Figure 6 As shown, it includes a seat body 61, a telescopic cylinder 62 and a print head 63. The telescopic cylinder 62 is installed on the side of the upper seat body 61 close to the print roller 1. The print head 63 is a conventional print head product on the market. The print head 63 is arranged along the axial direction of the print roller 1 and is connected to the telescopic cylinder 62.
[0045] Example 2
[0046] The thermal transfer printer of this embodiment includes the circular structure thermal transfer printing mechanism in the first embodiment.
[0047] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0050] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.
Claims
1. A circular structure thermal transfer printing mechanism, characterized in that: The invention comprises a printing roller (1), a plurality of printing head assemblies (2) and a plurality of integrated carbon ribbon boxes (3), wherein the printing roller (1) is rotatably mounted on the upper end of a printer frame, and its two ends respectively pass through two mounting side plates spaced apart from each other on the upper end of the printer frame, and guide rollers (4) parallel to the printing roller (1) are respectively arranged on both sides of the vertex of the lower arc of the printing roller (1), and the guide rollers (4) are rotatably assembled with the mounting side plates, and the printing head assembly (2) is mounted between the two mounting side plates, and the plurality of printing head assemblies (2) are respectively spaced apart along the circumferential direction. The printing roller (1) is distributed at intervals around the part other than the bottom, and the outer periphery of the printing roller (1) is covered with a paper feed film (5). The two ends of the paper feed film (5) are respectively bypassed by the side where the two guide rollers (4) are close to each other, and move away from each other on the lower sides. The multiple integrated carbon ribbon boxes (3) are respectively arranged at the multiple print head assemblies (2) in a one-to-one correspondence. The integrated carbon ribbon boxes (3) are installed on one side of the mounting side plate and extend between the two mounting side plates, and can be pulled out or loaded from one side of the mounting side plate.
2. A circumferential structure thermal transfer printing mechanism according to claim 1, characterized in that: The printing head assembly (2) is provided with six.
3. A circumferential structure thermal transfer printing mechanism according to claim 2, characterized in that: The six print head assemblies (2) are symmetrically distributed along a vertical line passing through the center of the print roller (1).
4. The circular structure thermal transfer printing mechanism according to claim 1, characterized in that: The central angle of the area covered by the paper feeding film (5) on the surface of the printing roller (1) is α, and 270°≤α.
5. The circular structure thermal transfer printing mechanism according to claim 2, characterized in that: The α=315°.
6. A circumferential structure thermal transfer printing mechanism according to claim 5, characterized in that: The center angle formed by the centers of two adjacent print head assemblies (2) and the center of the print roller (1) is β, and β=45°.
7. A circumferential structure thermal transfer printing mechanism according to any one of claims 1 to 6, characterized in that: The integrated carbon ribbon box (3) comprises a C-shaped box body (31) and two carbon ribbon rolls (32), wherein the box body (31) comprises a straight main box body and two straight assembly grooves vertically arranged on one side of the main box body, wherein the cross section of the assembly groove is an arc shape, and the openings of the two assembly grooves are oriented in the same direction, an elastic pressure head (33) is provided at one end of the assembly groove, and a fixed pressure head (34) is provided at the other end of the assembly groove, and the carbon ribbon roll (32) is placed in the assembly groove, and its two ends are detachably connected to the elastic pressure head (33) and the fixed pressure head (34) respectively, and are assembled and matched with each other, and the two assembly grooves of the box body (31) can pass through the matching assembly holes on the mounting side plate on one side and extend to the two sides of the corresponding print head assembly (2), or be pulled out from the assembly hole for removal.
8. The circular structure thermal transfer printing mechanism according to claim 7, characterized in that: The elastic pressing head (33) comprises a fixing seat (331), an elastic member (332) and a first limiting disc (333); the fixing seat (331) is assembled at one end of the assembly slot; the first limiting disc (333) is arranged at one end of the assembly slot and is close to the fixing seat (331); one end of the first limiting disc (333) is provided with a first columnar connecting portion (334) rotatably assembled therewith; the elastic member (332) is connected between the first connecting portion (334) and the fixing seat (331); the other end of the first limiting disc (333) is coaxially provided with a first cylindrical protrusion (335) inserted into the end of the carbon ribbon roll (32); The pressure head (34) comprises a columnar second connecting portion (341) and a second limiting disc (342); one end of the second connecting portion (341) is rotatably assembled with the other end of the assembly groove; the second limiting disc (342) is mounted on the other end of the second connecting portion (341); one end of the second limiting disc (342) which is away from the second connecting portion (341) is coaxially provided with a second cylindrical protrusion (343) which is inserted into the end of the carbon ribbon roll (32); the first cylindrical protrusion (335) and the second cylindrical protrusion (343) are coaxially distributed; the two ends of the carbon ribbon roll (32) are respectively inserted into the corresponding first cylindrical protrusion (335) and second cylindrical protrusion (343).
9. A circumferential structure thermal transfer printing mechanism according to claim 8, characterized in that: Position limiting protrusions are respectively provided on both sides of the ends of the first cylindrical protrusion (335) and the second cylindrical protrusion (343), and snap-fittings engaging with the position limiting protrusions are respectively provided at both ends of the carbon ribbon roll (32).
10. A thermal transfer printer, characterized in that: It comprises a circular structure thermal transfer printing mechanism as described in any one of claims 1 to 9.