Thermal printer with stably assembled rubber roller end part

Abstract

The thermal printer comprises a base, a cover body, a rubber roller, a thermosensitive sheet, an installation support and a supporting sheet, the installation support is fixedly installed on the cover body, the two ends of the installation support in the paper width direction are provided with a first supporting wall and a second supporting wall respectively, the supporting walls are provided with through holes respectively, and the first supporting wall and the second supporting wall are provided with through holes respectively. The supporting piece is provided with a third through hole, the first axial end of the rubber roller penetrates through the first through hole, the second axial end of the rubber roller penetrates through the third through hole, the second axial end of the rubber roller is clamped into the second through hole from the clamping opening, the supporting piece is fixedly connected with the installation support, and the first through hole, the second through hole and the third through hole are coaxially arranged. Through the arrangement of the bayonet and the through hole, the mounting and positioning of the axial end part of the rubber roller can be met, and the supporting sheet reinforces and supports the second axial end part of the rubber roller through the closed third through hole, so that the operation stability of the rubber roller is improved, and even though the structure at the bayonet is fatigued, a certain supporting degree can be provided through the supporting sheet.

Description

Technical Field

[0001] The utility model relates to the field of thermal printing, in particular to a thermal printer with a stable end assembly of a rubber roller. Background Art

[0002] With the popularization and application of thermal printers, they are widely used in the warehousing and logistics industry. Thermal printers include thermal transfer printers using the carbon ribbon thermal transfer principle and thermal printers using thermal paper thermal imaging. After thermal printing imaging, the printed paper is output outward for users to use.

[0003] A thermal printer generally has a base, a cover, a rubber roller and a thermal film. The printed paper enters the position between the rubber roller and the thermal film, and through the heating of the thermal film, the imaging of images and texts is realized. For the relative position stability of the thermal film and the rubber roller, it directly affects the printing stability and printing quality. Therefore, how to keep the stable rotation of the rubber roller is particularly important.

[0004] In the prior art, when the rubber roller needs to be assembled or replaced due to wear, one end of the rubber roller is assembled through a closed round hole, and the other end of the rubber roller is assembled through a C-shaped card slot. However, the C-shaped card slot is prone to fatigue during assembly or disassembly, which affects the rotation stability of the rubber roller and also affects the durability of the printer. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a thermal printer with a stable end assembly of a rubber roller.

[0006] To achieve the purpose of the utility model, the utility model provides a thermal printer with a stable end assembly of a rubber roller, which includes a base, a cover, a rubber roller and a thermal film. The base is provided with a paper bin, the cover is hinged to the base and covers above the paper bin, the thermal film is arranged on the base along the paper width direction, and a paper outlet is formed between the cover and the base; the thermal printer also includes a mounting bracket and a support piece. The mounting bracket is fixedly installed on the cover. The mounting bracket is respectively provided with a first support wall and a second support wall at both ends in the paper width direction. The first support wall is provided with a first through hole penetrating along the paper width direction, and the peripheral wall of the first through hole is closed. The second support wall is provided with a second through hole penetrating along the paper width direction, and a bayonet is arranged on the peripheral wall of the second through hole, and the bayonet communicates with the second through hole; the support piece is provided with a third through hole penetrating along the paper width direction, and the peripheral wall of the third through hole is closed. The first axial end of the rubber roller passes through the first through hole, the second axial end of the rubber roller passes through the third through hole, the second axial end of the rubber roller is snapped into the second through hole from the bayonet, the support piece is fixedly connected with the mounting bracket, the first through hole, the second through hole and the third through hole are coaxially arranged, and the rubber roller is opposite to the thermal film.

[0007] A further solution is that the support piece includes a horizontal piece and a vertical piece that are perpendicularly connected to each other. The third through hole is located at the vertical piece. The mounting bracket is provided with a support bottom wall connected between the first support wall and the second support wall, and the horizontal piece is fixedly connected to the support bottom wall.

[0008] A further solution is that the support bottom wall is provided with positioning columns, the horizontal piece is provided with positioning holes, and the positioning columns are in clearance fit with the positioning holes.

[0009] A further solution is that an assembly groove is formed between the first support wall, the second support wall and the support bottom wall. The support piece is located in the assembly groove, and the vertical piece is located inside the second support wall.

[0010] A further solution is that the support bottom wall is provided with a positioning groove on one side inside the assembly groove, and the groove wall of the positioning groove is in clearance fit with the horizontal piece.

[0011] A further solution is that the horizontal piece is adjacent to the support bottom wall, and the vertical piece is adjacent to the second support wall.

[0012] A further solution is that an assembly groove is formed between the first support wall, the second support wall and the support bottom wall. The support piece is located outside the assembly groove, and the vertical piece is located outside the second support wall.

[0013] A further solution is that the cover body is provided with a mounting baffle, and the mounting bracket is fixedly installed on the mounting baffle.

[0014] The beneficial effect of the present utility model is that through the setting of the bayonet and the closed setting of the first through hole, the installation and positioning of the axial end of the rubber roller can be satisfied. The support piece strengthens the support for the second axial end of the rubber roller through the closed third through hole, thereby improving the running stability of the rubber roller. Even if the structure at the bayonet is fatigued, a certain degree of support can still be provided by the support piece. Moreover, through the setting of the horizontal piece and the vertical piece, it is not only convenient for the assembly and positioning of the connecting piece, making the position of the connecting piece more stable, and then further improving the support for the second axial end. In addition, the support piece can provide support for the end of the rubber roller whether it is installed and fixed inside or outside the assembly groove, and the baffle of the cover body can facilitate the installation and fixing of the mounting baffle. Description of the Drawings

[0015] Figure 1 is the structural diagram of an embodiment of the thermal printer of the present utility model.

[0016] Figure 2 is the structural diagram of the embodiment of the thermal printer of the present utility model after the cover body is opened.

[0017] Figure 3 is the structural diagram of the cover body in the embodiment of the thermal printer of the present utility model.

[0018] Figure 4It is an exploded view of the cover in the embodiment of the thermal printer of the present utility model.

[0019] Figure 5 It is a structural diagram of the mounting baffle in the embodiment of the thermal printer of the present utility model.

[0020] Figure 6 It is an exploded view of the mounting baffle in the embodiment of the thermal printer of the present utility model.

[0021] Figure 7 It is a cross-sectional view of the cover in the embodiment of the thermal printer of the present utility model.

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Specific embodiments

[0023] Refer to Figures 1 to 7 , the thermal printer includes a base 12, a cover 11, a rubber roller 111, a thermal sheet, a mounting bracket 2 and a support sheet 25. The base 12 is provided with a paper bin 121. The cover 11 is hinged to the base 12 and covers the upper part of the paper bin 121. The thermal sheet is arranged on the base 12 along the paper width direction Y. An outlet 110 is formed between the cover 11 and the base 12.

[0024] The cover 11 is provided with a mounting baffle 116, and the mounting bracket 2 is fixedly installed on the mounting baffle 116. The mounting bracket 2 is respectively provided with a first support wall 21 and a second support wall 22 at both ends in the paper width direction Y. The first support wall 21 is provided with a first through hole 211 penetrating along the paper width direction Y, and the peripheral wall of the first through hole 211 is closed. The second support wall 22 is provided with a second through hole 221 penetrating along the paper width direction Y. The peripheral wall of the second through hole 221 is provided with a bayonet 222, and the bayonet 222 communicates with the second through hole 221. The cross-section after the bayonet 222 communicates with the second through hole 221 is arranged in a C shape. The mounting bracket 2 is connected with a support bottom wall 24 between the first support wall 21 and the second support wall 22, and an assembly groove 23 is formed among the first support wall 21, the second support wall 22 and the support bottom wall 24.

[0025] The first axial end 112 of the rubber roller 111 passes through the first through hole 211, the second axial end 113 of the rubber roller 111 passes through the third through hole 253, the second axial end 113 of the rubber roller 111 is clamped into the second through hole 221 from the bayonet 222, and a driving gear 114 is arranged on the outermost side of the second axial end 113 of the rubber roller 111 to receive the drive of a driving motor and then realize rotation.

[0026] The support piece 25 is fixedly connected to the mounting bracket 2. Specifically, the support piece 25 includes a transverse piece 251 and a longitudinal piece 252 that are perpendicularly connected to each other. The longitudinal piece 252 is provided with a third through hole 253 that runs through in the paper width direction Y. The peripheral wall of the third through hole 253 is closed. The support piece 25 is located within the assembly groove 23. On one side of the support bottom wall 24 within the assembly groove 23, there is a positioning groove 241. The groove wall of the positioning groove 241 is in clearance fit with the transverse piece 251. The support bottom wall 24 is provided with a positioning post 242. The positioning post 242 is located within the positioning groove 241. The transverse piece 251 is provided with a positioning hole 254. The positioning post 242 is in clearance fit with the positioning hole 254, and the positioning post 242 passes through the mounting baffle 116, the support bottom wall 24, and the support piece 25, thereby achieving the fixed connection of the three. The transverse piece 251 is adjacent to and fixedly connected to the support bottom wall 24. The connection method can adopt screw connection. The longitudinal piece 252 is located inside the second support wall 22, and the longitudinal piece 252 is adjacent to the second support wall 22.

[0027] After the rubber roller 111 is assembled, the first through hole 211, the second through hole 221, and the third through hole 253 are coaxially arranged. And as the cover body 11 is closed, the rubber roller 111 faces the thermal sheet. When the printing paper passes through the position between the rubber roller 111 and the thermal sheet, printing and imaging can be achieved accordingly.

[0028] Of course, the above embodiments are only the preferred embodiments of this case. The support piece can have different forms. For example, it can be arranged in a single-piece form. The support piece can also be connected to the second support wall, and it can also achieve the support of the end of the rubber roller. Moreover, the support piece can also be arranged outside the assembly groove, that is, the longitudinal piece is located outside the second support wall, and the support piece is connected to the mounting bracket, and it can also achieve the support of the end of the rubber roller.

[0029] As can be seen from the above, through the setting of the bayonet and the closed setting of the first through hole, the installation and positioning of the axial end of the rubber roller can be satisfied. And the support piece strengthens the support of the second axial end of the rubber roller through the closed third through hole, thereby improving the running stability of the rubber roller. Even if the structure at the bayonet is fatigued, a certain degree of support can still be provided by the support piece. Moreover, through the setting of the transverse piece and the longitudinal piece, it is not only convenient for the assembly and positioning of the connecting piece, making the position of the connecting piece more stable, and then further improving the support of the second axial end. In addition, whether the support piece is installed and fixed inside or outside the assembly groove, it can provide support for the end of the rubber roller, and the baffle of the cover body can facilitate the installation and fixing of the mounting baffle.

Claims

1. A thermal printer with a stable end assembly of a rubber roller, comprising a base, a cover, a rubber roller and a thermal film. The base is provided with a paper bin, the cover is hinged to the base and covers above the paper bin, the thermal film is arranged on the base along the paper width direction, and a paper outlet is formed between the cover and the base; It is characterized in that: The thermal printer further includes a mounting bracket and a support piece. The mounting bracket is fixedly installed on the cover. The mounting bracket is respectively provided with a first support wall and a second support wall at both ends in the paper width direction. The first support wall is provided with a first through hole penetrating along the paper width direction, and the peripheral wall of the first through hole is closed. The second support wall is provided with a second through hole penetrating along the paper width direction, and a bayonet is arranged on the peripheral wall of the second through hole, and the bayonet communicates with the second through hole; The support piece is provided with a third through hole penetrating along the paper width direction, and the peripheral wall of the third through hole is closed. The first axial end of the rubber roller passes through the first through hole, the second axial end of the rubber roller passes through the third through hole, and the second axial end of the rubber roller is snapped into the second through hole from the bayonet. The support piece is fixedly connected to the mounting bracket, and the first through hole, the second through hole and the third through hole are coaxially arranged, and the rubber roller is opposite to the thermal film.

2. The thermal printer according to claim 1, characterized in that: The support piece includes a horizontal piece and a vertical piece connected perpendicular to each other. The third through hole is located at the vertical piece. The mounting bracket is provided with a support bottom wall connected between the first support wall and the second support wall, and the horizontal piece is fixedly connected to the support bottom wall.

3. The thermal printer according to claim 2, characterized in that: The support bottom wall is provided with a positioning post, and the horizontal piece is provided with a positioning hole, and the positioning post and the positioning hole are in clearance fit.

4. The thermal printer according to claim 2, characterized in that: An assembly groove is formed among the first support wall, the second support wall and the support bottom wall. The support piece is located in the assembly groove, and the vertical piece is located inside the second support wall.

5. The thermal printer according to claim 4, characterized in that: One side of the support bottom wall in the assembly groove is provided with a positioning groove, and the groove wall of the positioning groove is in clearance fit with the horizontal piece.

6. The thermal printer according to claim 5, characterized in that: The horizontal piece is adjacent to the support bottom wall, and the vertical piece is adjacent to the second support wall.

7. The thermal printer according to claim 2, characterized in that: An assembly groove is formed among the first support wall, the second support wall and the support bottom wall. The support piece is located outside the assembly groove, and the vertical piece is located outside the second support wall.

8. The thermal printer according to any one of claims 1 to 7, characterized in that: An installation baffle is arranged on the cover, and the mounting bracket is fixedly installed on the installation baffle.

Images