Roll shaft of thermal printer for thermal transparent stickers

Abstract

The utility model relates to the technical field of thermal printers, in particular to a roll shaft of a thermal printer for a thermal transparent sticker, which comprises a roll shaft used for sleeving a printing paper roll and a positioning structure used for fixing the printing paper roll in an anti-skid manner, the positioning structure is arranged on the roll shaft, the roll shaft comprises a shaft barrel, a telescopic opening and a shaft head, and the shaft barrel is arranged on the positioning structure. The shaft heads are connected to the two ends of the shaft barrel, and the telescopic openings are formed in the two sides of the shaft barrel respectively. Through a mechanism composed of the roller shaft and the positioning structure, a set of roller shaft structure with high positioning performance on printing consumables such as thermosensitive transparent stickers is provided for a thermal printer, a printing consumable paper roll is supported through the roller shaft, and the circle center of the printing consumable paper roll and the roller shaft are further positioned through the positioning structure; according to the utility model, the use stability of the printing consumable paper roll in the printer is better, the variable-diameter adjustment can be realized, so that the device is suitable for consumable paper rolls with various inner diameters, the fitness to the inner diameters of the consumable paper rolls is good, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal printers, in particular to a roller of a thermal printer for thermal transparent stickers. Background Art

[0002] Thermal printers are widely used in retail, catering, medical, logistics, ticketing and other fields. They are used to print receipts in retail, quickly issue orders in the catering industry, print inspection reports in the medical system, mark package information in the logistics industry, and print tickets in the ticketing system.

[0003] The roller of the existing thermal printer supports the consumable paper roll such as thermal transparent stickers, but lacks a positioning mechanism with adjustable fit, which easily causes the consumable paper roll to move inside the printer. Especially when the printer is working, during the rotation and discharge of the consumable paper roll, the feeding and tension changes of the paper can easily cause the paper roll to shift, affecting the accuracy and continuity of printing, and even causing the printing task to fail. Therefore, a roller for a thermal printer for thermal transparent stickers is proposed. Utility Model Content

[0004] In response to the problems in the prior art, the utility model provides a roller for a thermal printer for thermal transparent stickers, which provides the thermal printer with a roller structure with high positioning performance for printing consumables such as thermal transparent stickers. The printing consumable paper roll is supported by the roller, and the center of the printing consumable paper roll and the roller are further positioned by the positioning structure, so that the printing consumable paper roll has better stability when used in the printer.

[0005] The technical solution adopted by the utility model to solve the technical problem is a roller of a thermal printer for thermal transparent stickers, comprising a roller for sleeved with a printing paper roll and a positioning structure for preventing the printing paper roll from slipping, wherein the positioning structure is arranged on the roller;

[0006] The roller shaft comprises a shaft barrel, a telescopic opening and a shaft head, wherein the shaft head is connected to both ends of the shaft barrel, and the telescopic opening is respectively opened on both sides of the shaft barrel.

[0007] By adopting the above technical solution, a mechanism consisting of a roller and a positioning structure is used to provide a thermal printer with a roller structure with high positioning performance for printing consumables such as thermal transparent stickers, and the printing consumable paper roll is supported by the roller.

[0008] Specifically, the positioning structure includes a piston cylinder, an arc-shaped pressure plate, an airbag, a threaded rod and a piston head. The piston cylinder is inserted into the shaft cylinder and fixed to the shaft cylinder. There are two groups of arc-shaped pressure plates, and the two groups of arc-shaped pressure plates are respectively arranged in the telescopic opening.

[0009] By adopting the above technical solution, the positioning structure further positions the center of the printing consumable paper roll and the roller, so that the printing consumable paper roll has better stability when used in the printer.

[0010] Specifically, two groups of airbags are provided, and the two groups of airbags are respectively adhesively fixed to both sides of the piston cylinder, and the side of the airbag away from the piston cylinder is adhesively fixed to the arc-shaped pressure plate.

[0011] By adopting the above technical solution, the arc-shaped pressing plate is pushed up by the expansion of the airbag, so that the arc-shaped pressing plate can better expand and position the paper roll sleeved on the roller.

[0012] Specifically, the inner wall at one end of the piston cylinder is provided with a smooth cylinder wall for placing the piston head, and the inner wall at the other end of the piston cylinder is provided with a threaded cylinder wall for threaded insertion of the threaded rod. The piston head is fixedly connected to one end of the threaded rod, and a hexagonal hole is provided at the end of the threaded rod away from the piston head.

[0013] By adopting the above technical solution, the air in the piston cylinder can be transported to the airbag through the movement of the piston head in the piston cylinder, so that the airbag can be expanded.

[0014] Specifically, an annular oil storage groove is provided on the outer periphery of the piston head, and air holes communicating with the airbag are provided on both sides of one end of the piston cylinder.

[0015] By adopting the above technical solution, the air hole facilitates the air in the piston cylinder to enter the air bag.

[0016] The beneficial effects of the present invention are as follows: through a mechanism composed of a roller and a positioning structure, a set of roller structures with high positioning performance for printing consumables such as thermal transparent stickers is provided for a thermal printer, the printing consumable paper roll is supported by the roller, and the center of the printing consumable paper roll and the roller are further positioned by the positioning structure, so that the printing consumable paper roll has better stability during use in the printer, and can be adjusted in diameter to be suitable for consumable paper rolls of various inner diameters. It has good fit to the inner diameter of the consumable paper roll and has a wide range of applications, and solves the problem that during the period when the roller of the existing thermal printer supports consumable paper rolls such as thermal transparent stickers, the consumable paper roll is easily moved inside the printer due to the lack of a positioning mechanism with adjustable fit, especially when the printer is working, during the period when the consumable paper roll is rotated and discharged, the paper conveying and tension changes easily cause the paper roll to shift, affecting the accuracy and continuity of printing, and even causing the failure of the printing task. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the positioning structure of the utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the piston cylinder of the present utility model;

[0021] Figure 4 Schematic diagram of the threaded rod of the present utility model;

[0022] Figure 5 This is a schematic diagram of the insertion of printing consumables in the present invention;

[0023] In the figure: roller 1, shaft cylinder 11, telescopic opening 12, shaft head 13, positioning structure 2, piston cylinder 21, smooth cylinder wall 211, threaded cylinder wall 212, air hole 213, arc-shaped pressure plate 22, air bag 23, threaded rod 24, hexagonal hole 241, piston head 25, annular oil storage groove 251. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1-5 As shown, the roller of a thermal printer for a thermal transparent sticker of the present invention comprises a roller 1 for sleeved with a printing paper roll and a positioning structure 2 for preventing the printing paper roll from slipping and fixing, wherein the positioning structure 2 is arranged on the roller 1;

[0026] The roller shaft 1 includes a shaft barrel 11 , a telescopic opening 12 and a shaft head 13 . The shaft head 13 is connected to both ends of the shaft barrel 11 , and the telescopic opening 12 is respectively opened on both sides of the shaft barrel 11 .

[0027] When in use, the roller 1 and the positioning structure 2 provide the thermal printer with a set of roller structures with high positioning performance for printing consumables such as thermal transparent stickers.

[0028] The present utility model also includes that the positioning structure 2 includes a piston cylinder 21, an arc-shaped pressure plate 22, an airbag 23, a threaded rod 24 and a piston head 25. The piston cylinder 21 is inserted into the shaft cylinder 11 and fixed to the shaft cylinder 11. The arc-shaped pressure plate 22 is provided in two groups, and the two groups of arc-shaped pressure plates 22 are respectively provided in the telescopic opening 12.

[0029] When in use, the center of the printing consumable paper roll is further positioned with respect to the roller 1 by the positioning structure 2, so that the printing consumable paper roll is more stable when in use in the printer.

[0030] The present invention also includes that the airbags 23 are provided in two groups, and the two groups of airbags 23 are respectively adhesively fixed to both sides of the piston cylinder 21 , and the side of the airbags 23 away from the piston cylinder 21 is adhesively fixed to the arc-shaped pressure plate 22 .

[0031] When in use, the arc-shaped pressing plate 22 is pushed up based on the expansion of the airbag 23 , so that the arc-shaped pressing plate 22 can better expand and position the paper roll sleeved on the roller shaft 1 .

[0032] The present utility model also includes that the inner wall at one end of the piston cylinder 21 is provided with a smooth cylinder wall 211 for placing the piston head 25, and the inner wall at the other end of the piston cylinder 21 is provided with a threaded cylinder wall 212 for threaded insertion of the threaded rod 24, the piston head 25 is fixedly connected to one end of the threaded rod 24, and the end of the threaded rod 24 away from the piston head 25 is provided with a hexagonal hole 241.

[0033] During use, the piston head 25 moves within the piston cylinder 21 so that the air in the piston cylinder 21 can be transported to the airbag 23 to inflate the airbag 23 .

[0034] The utility model further comprises: an annular oil storage groove 251 is formed on the outer periphery of the piston head 25 ; air holes 213 communicating with the air bag 23 are formed on both sides of one end of the piston cylinder 21 .

[0035] During use, the air hole 213 facilitates the air in the piston cylinder 21 to enter the air bag 23 .

[0036] When the present invention is in use, a printing paper roll of a thermal transparent sticker of the required specifications and sizes is selected, the paper roll is sleeved on the shaft cylinder 11, and then a hexagonal wrench is used to insert and rotate the inner hexagonal hole 241 to move the piston head 25 in the piston cylinder 21, so that the air at the rear end of the piston cylinder 21 is pushed and discharged into the airbag 23, and the airbag 23 expands and pushes the arc-shaped pressure plate 22, and the arc-shaped pressure plate 22 is pushed out from the telescopic opening 12, and the paper roll on the shaft cylinder 11 is expanded and positioned, so that the paper roll on the shaft cylinder 11 is more stable, and then the shaft head 13 is snapped into the shaft groove of the printer, and the thermal transparent sticker can be assembled in the thermal printer.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller for a thermal printer for a thermal transparent sticker, characterized in that: It comprises a roller (1) for sleeved printing paper roll and a positioning structure (2) for anti-slip fixing of the printing paper roll, wherein the positioning structure (2) is arranged on the roller (1); The roller shaft (1) comprises a shaft barrel (11), a telescopic opening (12) and a shaft head (13); the shaft head (13) is connected to both ends of the shaft barrel (11); and the telescopic opening (12) is respectively opened on both sides of the shaft barrel (11).

2. The roller of a thermal printer for a heat-sensitive transparent sticker according to claim 1, characterized in that: The positioning structure (2) includes a piston cylinder (21), an arc-shaped pressure plate (22), an air bag (23), a threaded rod (24) and a piston head (25). The piston cylinder (21) is inserted into the shaft cylinder (11) and fixed to the shaft cylinder (11). Two groups of arc-shaped pressure plates (22) are provided. The two groups of arc-shaped pressure plates (22) are respectively provided in the telescopic opening (12).

3. The roller of a thermal printer for a heat-sensitive transparent sticker according to claim 2, characterized in that: Two groups of airbags (23) are provided. The two groups of airbags (23) are respectively adhesively fixed to both sides of the piston cylinder (21), and the side of the airbags (23) away from the piston cylinder (21) is adhesively fixed to the arc-shaped pressure plate (22).

4. The roller of a thermal printer for a heat-sensitive transparent sticker according to claim 3, characterized in that: The inner wall of one end of the piston cylinder (21) is provided with a smooth cylinder wall (211) for placing the piston head (25), and the inner wall of the other end of the piston cylinder (21) is provided with a threaded cylinder wall (212) for threaded insertion of the threaded rod (24). The piston head (25) is fixedly connected to one end of the threaded rod (24), and the end of the threaded rod (24) away from the piston head (25) is provided with a hexagonal hole (241).

5. The roller of a thermal printer for a heat-sensitive transparent sticker according to claim 4, characterized in that: An annular oil storage groove (251) is provided on the outer periphery of the piston head (25), and air holes (213) communicating with the air bag (23) are provided on both sides of one end of the piston cylinder (21).

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