A bottom paper and top paper separation device and a label thermal printer

Abstract

The present invention relates to a bottom paper and face paper separation device and a thermal label printer. The bottom paper and face paper separation device may include a capillary, a heating roller, a first gear, a bottom paper roller, a second gear and a bottom paper pressing plate. The first gear is fixed to the end of the heating roller and meshes with a reduction gear set. The reduction gear set meshes with a driving gear fixed on a motor shaft. The second gear is fixed to the end of the bottom paper roller and meshes with the first gear. The heating roller, the first gear, the bottom paper roller and the second gear are configured so that the linear velocity of the bottom paper roller is greater than the linear velocity of the heating roller. The capillary is parallel to the heating roller and the bottom paper roller and can rotate. The label paper is pressed on the heating roller through a heating head and peeled off into the bottom paper and the face paper at the capillary. The bottom paper is pressed on the bottom paper roller through a bottom paper pressing plate. Since the linear velocity of the bottom paper roller is greater than the linear velocity of the heating roller, the bottom paper is in a tensioned state. Since the capillary can provide rolling friction, the base and the face paper are easily separated.

Description

Technical Field

[0001] The invention relates to a thermal label printer, in particular to a bottom paper and top paper separation device and a label thermal printer with the bottom paper and top paper separation device. Background Art

[0002] Thermal printers are popular among users because they are small and do not require toner replacement. Thermal label printers have been widely used in the logistics field. The bottom paper roller of the bottom paper and face paper separation device of the current thermal label printer does not use gear transmission, but rotates through friction. The linear speed of the heating roller and the bottom paper roller is the same, and the bottom paper and face paper separation point uses an optical axis to separate the bottom paper and face paper. The relative friction is large, and the bottom paper is prone to slipping, resulting in the problem that the bottom paper and face paper cannot be separated. Summary of the invention

[0003] The present invention aims to provide a bottom paper and top paper separation device and a label thermal printer having the bottom paper and top paper separation device to solve the above problems. To this end, the specific technical solution adopted by the present invention is as follows:

[0004] According to one aspect of the present invention, a bottom paper and face paper separation device is provided, which may include a capillary, a heating roller, a first gear, a bottom paper roller, a second gear and a bottom paper pressing plate, wherein the first gear is fixed to the end of the heating roller and meshes with a reduction gear set, the reduction gear set meshes with a driving gear fixed on a motor shaft, the second gear is fixed to the end of the bottom paper roller and meshes with the first gear, wherein the heating roller, the first gear, the bottom paper roller and the second gear are configured such that the linear velocity of the bottom paper roller is greater than the linear velocity of the heating roller; the capillary is parallel to the heating roller and the bottom paper roller and can rotate, the label paper is pressed on the heating roller by a heating head and is peeled off into the bottom paper and the face paper at the capillary, and the bottom paper is pressed on the bottom paper roller by the bottom paper pressing plate.

[0005] Furthermore, the diameter of the bottom paper roller is the same as that of the heating roller, the module of the first gear is the same as that of the second gear, and the number of teeth of the first gear is greater than that of the second gear.

[0006] Furthermore, the number of teeth of the first gear is 1 to 3 teeth greater than the number of teeth of the second gear.

[0007] Further, the first gear is identical to the second gear, and the diameter of the bottom paper roller is greater than the diameter of the heating roller.

[0008] Furthermore, the capillary tube is composed of a core shaft and an outer sleeve, and both ends of the core shaft are exposed from the outer sleeve and fixed on the housing of the thermal label printer.

[0009] Furthermore, the diameter of the core shaft is 1 mm, and the inner diameter of the outer sleeve is 1.1 mm and the outer diameter is 1.3 mm.

[0010] Further, the reduction gear group includes a first reduction gear, a second reduction gear, a third reduction gear and a fourth reduction gear, wherein the first reduction gear and the second reduction gear are coaxially arranged and the third reduction gear and the fourth reduction gear are coaxially arranged, the first reduction gear and the third reduction gear are large gears, and the second reduction gear and the fourth reduction gear are small gears; the first reduction gear is meshed with the driving gear, the second reduction gear is meshed with the third reduction gear, and the fourth reduction gear is meshed with the first gear.

[0011] Furthermore, a pressing spring is provided on the bottom paper pressing plate to adjust the pressing force of the bottom paper pressing plate.

[0012] According to another aspect of the present invention, there is also provided a thermal label printer having the bottom paper and top paper separation device as described above.

[0013] The present invention adopts the above technical solution, which has the beneficial effect that since the linear speed of the bottom paper roller is greater than the linear speed of the heating roller, the bottom paper is in a tensioned state, and since the capillary can provide rolling friction, the base and the surface paper are easily separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0015] Figure 1 is a perspective view of a thermal label printer according to an embodiment of the present invention, wherein a housing portion is removed;

[0016] Figure 2 yes Figure 1 Another perspective view of the thermal label printer shown with the label paper removed;

[0017] Figure 3 yes Figure 1 A partial side sectional view of a thermal label printer shown

[0018] Figure 4 yes Figure 1 A front view of a capillary tube of a bottom paper and top paper separation device is shown;

[0019] Figure 5 yes Figure 3 Side view of the capillary shown. DETAILED DESCRIPTION

[0020] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0021] like Figures 1 to 3 As shown, a bottom paper and face paper separation device of a thermal label printer may include a capillary 1, a heating roller 2, a first gear 3, a bottom paper roller 4, a second gear 5 and a bottom paper pressing plate 6. The capillary 1, the heating roller 2 and the bottom paper roller 4 are parallel to each other and rotatably mounted on the housing of the thermal label printer. The label paper 100 is pressed on the heating roller 2 by the heating head 7 and peeled off into the bottom paper 101 and the face paper 102 at the capillary 1, and the bottom paper 101 is pressed on the bottom paper roller 4 by the bottom paper pressing plate 6. The heating roller 2 and the bottom paper roller 4 can be driven to rotate by a motor and a corresponding gear transmission mechanism. Specifically, the first gear 3 is fixed to the end of the heating roller 2 and meshed with the reduction gear set 8, the reduction gear set 8 is meshed with the driving gear 9 fixed on the motor shaft, and the second gear 5 is fixed to the end of the bottom paper roller 4 and meshed with the first gear 3. Among them, the heating roller 2, the first gear 3, the bottom paper roller 4 and the second gear 5 are configured so that the linear velocity of the bottom paper roller 4 is greater than the linear velocity of the heating roller 2. Since the linear speed of the bottom paper roller 4 is greater than the linear speed of the heating roller 2, the bottom paper 101 is always in a tensioned state; and the bottom paper 101 and the face paper 102 are separated at a point A by a rotatable capillary 1. There is rolling friction between the bottom paper 101 and the capillary 1, and the friction force is small. The bottom paper 101 is not easy to slip. Therefore, the paper 101 and the face paper 102 are easier to separate.

[0022] In the present invention, the linear speed of the bottom paper roller 4 being greater than the linear speed of the heating roller 2 can be achieved by the following two structural configurations:

[0023] 1. The diameter of the heating roller 2 is the same as that of the bottom paper roller 4, the first gear 3 and the second gear 5 have the same module, and the number of teeth of the first gear 3 is greater than that of the second gear 5. Therefore, at the same input speed, the linear speed of the bottom paper roller 4 is faster and the linear speed of the heating roller 2 is slower. Preferably, the number of teeth of the first gear 3 is 1 to 3 teeth larger than that of the second gear 5, so that the linear speed of the bottom paper roller 4 is slightly greater than that of the heating roller 2.

[0024] Second, the first gear 3 is the same as the second gear 5 (i.e., the size, module, and number of teeth are the same), and the diameter of the bottom paper roller 4 is larger than the diameter of the heating roller 2. Preferably, the diameter of the bottom paper roller 4 is about 5% larger than the diameter of the heating roller 2, so that the linear speed of the bottom paper roller 4 is slightly larger than the linear speed of the heating roller 2 (i.e., about 5%).

[0025] like Figure 1 , 4As shown in Figures 5 and 6, the capillary 1 is composed of a core shaft 11 and an outer sleeve 12. The two ends of the core shaft 11 are exposed from the outer sleeve 12 and fixed to the housing of the thermal label printer. Therefore, rolling friction is generated between the outer sleeve 12 and the bottom paper 101, and the bottom paper 101 is not easy to slip. In a specific embodiment, the diameter of the core shaft 11 is 1 mm, and the inner diameter of the outer sleeve 12 is 1.1 mm and the outer diameter is 1.3 mm.

[0026] like Figure 1 and 2 As shown, the reduction gear set 8 includes a first reduction gear 81, a second reduction gear 82, a third reduction gear 83 and a fourth reduction gear 84, wherein the first reduction gear 81 and the second reduction gear 82 are coaxially arranged and the third reduction gear 83 and the fourth reduction gear 84 are coaxially arranged, the first reduction gear 81 and the third reduction gear 83 are large gears, and the second reduction gear 82 and the fourth reduction gear 84 are small gears; the first reduction gear 81 is meshed with the driving gear 9, the second reduction gear 82 is meshed with the third reduction gear 83, and the fourth reduction gear 84 is meshed with the first gear 3. That is to say, the reduction gear set 8 can achieve four-stage reduction.

[0027] like Figure 3 As shown, the heating head 7 and the bottom paper pressing plate 6 are both provided with corresponding pressing springs 71 and 61 to adjust the pressing force of the heating head 7 on the label 100 and the pressing force of the bottom paper pressing plate 6 on the bottom paper 101. Since the linear speed of the bottom paper roller 4 is faster than the linear speed of the heating roller, the bottom paper roller 4 will slightly slip with the bottom paper 101, and the sensitivity of the slip depends on the spring force of the pressing spring 61 (i.e., the pressing force of the bottom paper pressing plate 6 on the bottom paper 101). Therefore, by adjusting the spring force of the pressing spring 61, the slight slip of the bottom paper 101 can be overcome, and the reliable separation of the bottom paper 101 and the face paper 102 can be ensured.

[0028] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A bottom paper and top paper separation device, characterized in that: It includes a capillary, a heating roller, a first gear, a bottom paper roller, a second gear and a bottom paper pressing plate, wherein the first gear is fixed to the end of the heating roller and meshes with the reduction gear set, the reduction gear set meshes with the driving gear fixed on the motor shaft, the second gear is fixed to the end of the bottom paper roller and meshes with the first gear, wherein the heating roller, the first gear, the bottom paper roller and the second gear are configured so that the linear speed of the bottom paper roller is greater than the linear speed of the heating roller; the capillary is parallel to the heating roller and the bottom paper roller and can rotate, the label paper is pressed on the heating roller through the heating head and peeled into the bottom paper and the face paper at the capillary, and the bottom paper is pressed on the bottom paper roller through the bottom paper pressing plate.

2. The bottom paper and top paper separation device according to claim 1, characterized in that: The diameter of the bottom paper roller is the same as that of the heating roller, the module of the first gear is the same as that of the second gear, and the number of teeth of the first gear is greater than that of the second gear.

3. The bottom paper and top paper separation device according to claim 2, characterized in that: The number of teeth of the first gear is 1 to 3 teeth greater than the number of teeth of the second gear.

4. The bottom paper and top paper separation device according to claim 1, characterized in that: The first gear is identical to the second gear, and the diameter of the bottom paper roller is larger than the diameter of the heating roller.

5. The bottom paper and top paper separation device according to claim 1, characterized in that: The capillary tube is composed of a core shaft and an outer sleeve, and two ends of the core shaft are exposed from the outer sleeve and are fixed on the shell of the thermal label printer.

6. The bottom paper and top paper separation device according to claim 5, characterized in that: The mandrel has a diameter of 1 mm, and the outer sleeve has an inner diameter of 1.1 mm and an outer diameter of 1.3 mm.

7. The bottom paper and top paper separation device according to claim 1, characterized in that: The reduction gear set comprises a first reduction gear, a second reduction gear, a third reduction gear and a fourth reduction gear, wherein the first reduction gear and the second reduction gear are coaxially arranged and the third reduction gear and the fourth reduction gear are coaxially arranged, the first reduction gear and the third reduction gear are large gears, and the second reduction gear and the fourth reduction gear are small gears; The first reduction gear is meshed with the driving gear, the second reduction gear is meshed with the third reduction gear, and the fourth reduction gear is meshed with the first gear.

8. The bottom paper and top paper separation device according to claim 1, characterized in that: A compression spring is provided on the bottom paper pressing plate to adjust the compression force of the bottom paper pressing plate.

9. A thermal printer having the bottom paper and top paper separation device according to any one of claims 1 to 8.

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