Circumferential structure thermal transfer printing mechanism and thermal transfer printer with same

Abstract

The utility model relates to a thermal transfer printing mechanism with a circumferential structure and a thermal transfer printer with the thermal transfer printing mechanism. The thermal transfer printing mechanism comprises a printing roller, a printing head assembly and an integrated thermal transfer ribbon box, the printing roller is transversely and rotatably installed at the upper end of the printer rack, guide rollers are arranged on the two sides of the vertex of the lower arc of the printing roller correspondingly, and the printing head assembly is installed between the two installation side plates; the multiple printing head assemblies are distributed on the portions, except the bottom, of the periphery of the printing roller in the circumferential direction at equal intervals, the periphery of the printing roller is wrapped with a paper feeding film, the two ends of the paper feeding film are wound around the sides, close to each other, of the two guide rollers respectively, and the two lower sides of the paper feeding film are away from each other. The multiple integrated thermal transfer ribbon boxes are arranged at the multiple printing head assemblies in a one-to-one correspondence mode, and the integrated thermal transfer ribbon boxes are installed on the installation side plate on one side. The device has the advantages that single-time or multi-time transfer printing of a printing medium is achieved, and the overprinting precision is improved; and the large-angle arc-shaped paper feeding film path can enable the photographic paper to be more closely covered on the printing roller, so that the space utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a printer equipment field, especially a circumference structure heat transfer printing mechanism and have its heat transfer printer. BACKGROUND

[0002] Heat transfer printing technology is widely used in outdoor identification, label, bill and other printing fields.

[0003] The conventional heat transfer printer usually adopts multiple printing rollers, which not only has a large equipment size, but also has low overprint precision when printing in multiple colors due to the difficulty in accurately controlling the relative positions of the printing rollers.

[0004] Therefore, it is necessary to develop a circumference structure heat transfer printing mechanism and a heat transfer printer having the same to overcome the above technical problems. SUMMARY

[0005] The utility model provides a circumference structure heat transfer printing mechanism and a heat transfer printer having the same to overcome the defects of the prior art.

[0006] The technical scheme for solving the above technical problems is as follows:

[0007] A circumference structure heat transfer printing mechanism includes a printing roller, multiple printhead assemblies, and multiple integrated carbon ribbon cartridges. The printing roller is horizontally rotatable and mounted on the upper end of a printer frame. The two ends of the printing roller pass through two installation side plates arranged at intervals on the upper end of the printer frame. Two guide rollers are arranged on both sides of the lower arc apex of the printing roller. The guide rollers are rotatably assembled with the installation side plates. The printhead assemblies are mounted between the two installation side plates. Multiple printhead assemblies are distributed at equal intervals around the printing roller except for the bottom portion. A paper feed film is wrapped around the outer periphery of the printing roller. The two ends of the paper feed film pass through the two guide rollers on one side and move away from each other. Multiple integrated carbon ribbon cartridges are arranged one by one corresponding to the printhead assemblies. The integrated carbon ribbon cartridges are mounted on one side of the installation side plate and extend between the two installation side plates. The integrated carbon ribbon cartridges can be pulled out or mounted from one side of the installation side plate.

[0008] Based on the above technical scheme, the utility model can also be improved as follows.

[0009] Further, the printhead assemblies are provided with six printheads.

[0010] Further, the six printhead assemblies are symmetrically distributed along the vertical line passing through the center of the printing roller.

[0011] Further, the central angle of the wrapping area on the surface of the print roller is α, and 270°≤α.

[0012] Further, α=315°.

[0013] Further, the central angle of the circle formed by the centers of two adjacent print head assemblies and the center of the print roller is β, and β=45°.

[0014] Further, the integral carbon tape cartridge comprises a C-shaped cartridge body and two carbon tape rolls, the cartridge body comprises a straight main cartridge body and two straight assembly grooves vertically arranged on one side of the main cartridge body, the cross section of the assembly groove is arc-shaped, and the openings of the two assembly grooves are consistent, one end of the assembly groove is provided with an elastic pressure head, and the other end of the assembly groove is provided with a fixed pressure head, the carbon tape roll is arranged in the assembly groove, and the two ends of the carbon tape roll are detachably connected with the elastic pressure head and the fixed pressure head respectively and are assembled with each other, the two assembly grooves of the cartridge body can pass through the matched assembly holes on one side of the mounting side plate and extend to the two sides of the corresponding print head assembly, or be pulled out of the assembly holes for disassembly.

[0015] Further, the elastic pressure head comprises a fixed seat, an elastic member and a first limiting disc, the fixed seat is assembled at one end of the assembly groove, the first limiting disc is arranged at one end of the assembly groove and close to the fixed seat, one end of the first limiting disc is provided with a cylindrical first connecting part rotatably assembled therewith, the elastic member is connected between the first connecting part and the fixed seat, and the other end of the first limiting disc is coaxially provided with a first cylindrical protrusion inserted into the end of the carbon tape roll; the fixed pressure head comprises a cylindrical second connecting part and a second limiting disc, one end of the second connecting part is rotatably assembled with the other end of the assembly groove, the second limiting disc is arranged at the other end of the second connecting part, one end of the second limiting disc away from the second connecting part is coaxially provided with a second cylindrical protrusion inserted into the end of the carbon tape roll, the first cylindrical protrusion and the second cylindrical protrusion are coaxially distributed, and the two ends of the carbon tape roll are respectively inserted into the outer surfaces of the first cylindrical protrusion and the second cylindrical protrusion.

[0016] Further, the two sides of the end of the first cylindrical protrusion and the second cylindrical protrusion are respectively provided with limiting protrusions, and the two ends of the carbon tape roll are respectively provided with a bayonet hole matched with the limiting protrusions.

[0017] The utility model discloses a beneficial effect is: structural design is reasonable, ingenious, adopts multiple print head assembly common printing roller's mode, realizes single or multiple transfer printing to printing medium, has improved the overprinting precision greatly, simultaneously, the paper film path of large angle arc can make photo paper more obediently cover on the printing roller, and the structure has improved the space utilization ratio greatly, has simplified the printing structure, has reduced the overall size of printer, in addition, the integral design of carbon ribbon cassette has solved the problem of inconvenient carbon ribbon replacement caused by the space is not rich, and the replacement is very convenient, fast.

[0018] Also provided is a thermal transfer printer comprising a circumferential structure thermal transfer printing mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the circumferential structure thermal transfer printing mechanism of the utility model;

[0020] Figure 2 It is a distribution diagram of printing roller, print head assembly and integral carbon ribbon cassette in the circumferential structure thermal transfer printing mechanism of the utility model;

[0021] Figure 3 It is an assembly drawing of print head assembly and integral carbon ribbon cassette in the circumferential structure thermal transfer printing mechanism of the utility model;

[0022] Figure 4 It is a structural schematic view of integral carbon ribbon cassette in the circumferential structure thermal transfer printing mechanism of the utility model;

[0023] Figure 5 It is a structural schematic view of integral carbon ribbon cassette after removing one carbon ribbon roll in the circumferential structure thermal transfer printing mechanism of the utility model;

[0024] Figure 6 It is a structural schematic view of print head assembly in the circumferential structure thermal transfer printing mechanism of the utility model.

[0025] In the drawings, the component list represented by each sign is as follows:

[0026] 1, printing roller; 2, print head assembly; 3, integral carbon ribbon cassette; 4, guide roller; 5, paper film; 31, cassette body; 32, carbon ribbon roll; 33, elastic pressure head; 34, fixed pressure head; 331, fixed seat; 332, elastic member; 333, first limit disc; 334, first connecting portion; 335, first cylindrical boss; 341, second connecting portion; 342, second limit disc; 343, second cylindrical boss. DETAILED DESCRIPTION

[0027] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0028] Example 1

[0029] like Figure 1 、 2 As shown, the circumferential thermal transfer printing mechanism of this embodiment includes a print roller 1, multiple print head assemblies 2, and multiple integrated carbon ribbon cartridges 3. The print 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 are provided on both sides of the lower arc vertex of the print roller 1 and are parallel to the print roller 1. The guide rollers 4 are rotatably assembled with the mounting side plates. The print head assembly 2 is mounted between the two mounting side plates (specifically, mounted on one or both mounting side plates). The multiple print head assemblies 2 are distributed at equal intervals along the circumference around the print roller 1 except for the bottom. The outer periphery of the print roller 1 is covered with a paper feed film 5. The two ends of the paper feed film 5 respectively pass around the side where the two guide rollers 4 are close to each other and move away from each other downwardly. The multiple integrated carbon ribbon cartridges 3 are respectively disposed on the multiple print head assemblies 2 in a one-to-one correspondence. The integrated carbon ribbon cartridges 3 are mounted on one mounting side plate and extend between the two mounting side plates. They can be pulled out or loaded through one 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 at the bottom and two vertically spaced and parallel mounting side panels installed on the upper end of the supporting frame. Both ends of the print roller 1 vertically pass through the holes in the middle of the two mounting side panels, and are respectively equipped with bearing seats. The bearing seats are installed on the upper end of the supporting frame through supporting columns. Multiple print head assemblies 2 are installed between the mounting side panels on both sides and assembled with the side panels. An integrated carbon ribbon cartridge 3 is installed on one side of the mounting side panel and can be pulled out or assembled. After assembly, the main part of the integrated carbon ribbon cartridge 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 single print roller 1. The print roller 1 rotates in a circular direction, avoiding the influence of differences between the use of multiple print rollers, achieving single or multiple transfers to the print medium, and greatly improving the accuracy of overprinting. At the same time, the use of a circular layout, high integration, and a large-angle paper and film path (i.e., paper film 5) shorten the length of the printer's paper and film path, making the overall structure 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 reel is made into an integrated carbon ribbon cassette, which can be removed as a whole and then replaced by the user, not only solving this problem but also simplifying operation.

[0032] It should be noted that one of the guide rollers 4 is coated with a rubber layer in this embodiment, which is mainly used to pull the paper film 5, and the other guide roller 4 is not coated with a rubber layer, which is mainly used to transition and guide the paper film 5.

[0033] In this embodiment, the above-mentioned print head assembly 2 is preferably provided with six.

[0034] In this embodiment, the six above-mentioned print head assemblies 2 are symmetrically distributed along the vertical line passing through the center of the above-mentioned print roller 1.

[0035] In this embodiment, the central angle of the wrapping area of the above-mentioned paper film 5 on the surface of the above-mentioned print roller 1 is α, and 270°≤α. This realizes a large-angle paper film path design.

[0036] Preferably, the above-mentioned α = 315°.

[0037] In this embodiment, the central angle formed by the centers of the two adjacent above-mentioned print head assemblies 2 and the center of the above-mentioned print roller 1 is β, and β = 45°. Among them, the distribution of the print head assembly 2 is adapted to the paper film path, covering the entire path of the paper film path.

[0038] As a preferred embodiment, as shown in Figure 3 , 4 , 5, the above-mentioned integrated carbon tape box 3 includes a C-shaped box body 31 and two carbon tape rolls 32. The above-mentioned box body 31 includes a straight bar-shaped main box body and two straight bar-shaped 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 consistent. One end of the above-mentioned assembly groove is provided with an elastic pressure head 33, and the other end of the above-mentioned assembly groove is provided with a fixed pressure head 34. The above-mentioned carbon tape roll 32 is placed in the above-mentioned assembly groove, and the two ends thereof are respectively detachably connected with the above-mentioned elastic pressure head 33 and the fixed pressure head 34, and are assembled with each other. The two assembly grooves of the above-mentioned box body 31 can pass through the assembly hole matched on the side mounting side plate, and extend to the two sides of the corresponding above-mentioned print head assembly 2, or be pulled out from the above-mentioned assembly hole for disassembly.

[0039] In the above-mentioned embodiment, two carbon tape rolls 32 (one winding and one unwinding) are loaded into the carbon tape box 3, and the whole is extended from the assembly hole on one side of the printer rack until the C-shaped main box body of the carbon tape box 3 abuts against one side of the printer rack and the two are assembled and connected. The two parallel assembly grooves extend into the printer rack and are located on both sides of the print head assembly 2, then the unwound carbon tape is pulled out to pass around the matched part of the print head assembly 2, and then wound on the other carbon tape roll. When it needs to be replaced, the carbon tape roll is separated from the print head assembly 2, and then the whole is pulled out from the assembly hole on one side of the printer rack, 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 protrusion 333 inserted into the end of the carbon ribbon roll 32. 5; The fixed pressure head 34 includes a cylindrical 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, and the second limiting disc 342 is installed on the other end of the second connecting portion 341. The end of the second limiting disc 342 away from the second connecting portion 341 is coaxially provided with a second cylindrical protrusion 343 inserted into the end of the carbon ribbon roll 32, the first cylindrical protrusion 335 and the second cylindrical protrusion 343 are coaxially distributed, and the two ends of the carbon ribbon roll 32 are respectively inserted into the corresponding first cylindrical protrusion 335 and second cylindrical protrusion 343.

[0041] In the above embodiment, the first cylindrical protrusion 335 and the second cylindrical protrusion 343 are respectively inserted into the two ends of the carbon ribbon roll. When it needs to be removed, external force is applied to the first limiting disc 333 to compress the elastic part 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 loading it, which is very quick and convenient.

[0042] In this embodiment, the ends of the first cylindrical protrusion 335 and the second cylindrical protrusion 343 are each provided with a stopper protrusion on either side, and the ends of the ribbon roll 32 are provided with a latch that engages with the stopper protrusion. This ensures that the first cylindrical protrusion 335 and the second cylindrical protrusion 343 fit tightly with the ends of the ribbon roll 32.

[0043] In this embodiment, the print head assembly 2 belongs to the patented technology, and its specific structure is as follows:

[0044] like Figure 6 As shown, it includes a base body 61, a telescopic cylinder 62 and a print head 63. The telescopic cylinder 62 is installed on the side of the upper base 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 circumferential structure thermal transfer printing mechanism in embodiment 1.

[0047] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0048] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0049] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0050] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A circumferential thermal transfer printing mechanism, characterized by: The application relates to a printing device, which comprises a printing roller (1), a plurality of printing head assemblies (2) and a plurality of integral carbon tape boxes (3), the printing roller (1) is horizontally rotatably arranged on the upper end of a printer frame, and the two ends of the printing roller (1) respectively pass through two installation side plates which are arranged at intervals on the upper end of the printer frame, two guide rollers (4) which are parallel to the printing roller (1) are arranged on the two sides of the lower arc top point of the printing roller (1), the guide rollers (4) are rotatably arranged on the installation side plates, the printing head assemblies (2) are arranged between the two installation side plates, the plurality of printing head assemblies (2) are distributed at intervals along the circumference of the printing roller (1) except the bottom part, a paper running film (5) is wrapped on the outer periphery of the printing roller (1), the two ends of the paper running film (5) pass through the two guide rollers (4) on the side close to each other and are directed to the two sides far away from each other, the plurality of integral carbon tape boxes (3) are arranged one by one corresponding to the plurality of printing head assemblies (2), the integral carbon tape boxes (3) are arranged on one side of the installation side plate and extend into the two installation side plates, and the integral carbon tape boxes (3) can be pulled out or arranged into the installation side plate.

2. A circumferential thermal transfer printing mechanism according to claim 1, wherein: The printing head assembly (2) is provided with six.

3. A circumferential thermal transfer printing mechanism according to claim 2, wherein: The six printing head assemblies (2) are symmetrically distributed along the vertical line passing through the center of the printing roller (1).

4. A circumferential thermal transfer printing mechanism according to claim 1, wherein: The central angle of the wrapping area of the paper running film (5) on the surface of the printing roller (1) is alpha, and 270 DEG <= alpha.

5. A circumferential thermal transfer printing mechanism according to claim 4, wherein: The alpha is 315 DEG.

6. A circumferential thermal transfer printing mechanism according to claim 5, wherein: The central angle formed by the centers of the two adjacent printing head assemblies (2) and the center of the printing roller (1) is beta, and beta = 45 DEG.

7. A circumferential thermal transfer printing mechanism according to any one of claims 1 to 6, wherein: The integral carbon tape box (3) comprises a C-shaped box body (31) and two carbon tape rolls (32), the box body (31) comprises a straight strip-shaped main box body and two straight strip-shaped assembly grooves which are vertically arranged on one side of the main box body, the assembly grooves are circular arc-shaped in cross section, and the two assembly grooves are consistent in opening direction, one end of the assembly groove is provided with an elastic pressure head (33), the other end of the assembly groove is provided with a fixed pressure head (34), the carbon tape rolls (32) are arranged in the assembly grooves, and the two ends of the carbon tape rolls (32) are detachably connected with the elastic pressure head (33) and the fixed pressure head (34) and are assembled with each other, the two assembly grooves of the box body (31) can pass through the assembly holes on one side of the installation side plate and extend to the two sides of the corresponding printing head assembly (2) or be pulled out from the assembly holes.

8. A circumferential thermal transfer printing mechanism according to claim 7, wherein: The elastic pressure head (33) comprises 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 assembling groove, the first limiting disc (333) is arranged at one end of the assembling groove and is close to the fixed seat (331), one end of the first limiting disc (333) is provided with a cylindrical first connecting part (334) which is rotatably assembled with the first limiting disc (333), the elastic member (332) is connected between the first connecting part (334) and the fixed seat (331), and the other end of the first limiting disc (333) is coaxially provided with a first cylindrical protrusion (335) which is inserted into the end of the carbon tape roll (32); the fixed pressure head (34) comprises a cylindrical second connecting part (341) and a second limiting disc (342), one end of the second connecting part (341) is rotatably assembled with the other end of the assembling groove, and the second limiting disc (342) is arranged at the other end of the second connecting part (341); one end of the second limiting disc (342) away from the second connecting part (341) is coaxially provided with a second cylindrical protrusion (343) which is inserted into the end of the carbon tape roll (32), the first cylindrical protrusion (335) and the second cylindrical protrusion (343) are coaxially distributed, and the two ends of the carbon tape roll (32) are respectively inserted into the first cylindrical protrusion (335) and the second cylindrical protrusion (343) outside.

9. A circumferential thermal transfer printing mechanism according to claim 8, wherein: The two sides of the ends of the first cylindrical protrusion (335) and the second cylindrical protrusion (343) are respectively provided with limiting protrusions, and the two ends of the carbon tape roll (32) are respectively provided with a bayonet which is clamped with the limiting protrusions.

10. A thermal transfer printer characterized by comprising: The circular structure heat transfer printing mechanism comprises a rotating shaft (1), a rotating disc (2) and a rotating disc (3), the rotating shaft (1) is rotatably arranged on the rotating disc (2), the rotating disc (2) is rotatably arranged on the rotating disc (3), and the rotating disc (3) is rotatably arranged on the rotating disc (2).

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