Printing apparatus

Abstract

The utility model discloses a printing device. The printing device comprises a printing paper conveying channel; the printing consumable conveying mechanism is used for conveying printing consumables to a printing position; the printing mechanism is arranged above the printing paper conveying channel and comprises a thermal head and a thermal head lifting assembly, and the thermal head is used for transferring printing supplies to printing paper; the printing mechanism further comprises a pressing roller arranged on the front side of the printing mechanism, and the pressing roller is used for pressing printing paper and enabling the printing paper which does not enter the printing position to be away from the printing supplies in the conveying process. The press roll is arranged to press passing printing paper, it is guaranteed that the distance gap is kept between the printing paper and the printing supplies as far as possible when the printing paper does not enter the printing position, therefore, the printing supplies are prevented from generating marks on the printing paper, the printing effect is improved, and the printing device is simple in structure, easy to manufacture and maintain and suitable for large-scale popularization.

Description

Technical Field

[0001] The utility model relates to the field of printing equipment, and particularly to a printing device. Background Art

[0002] At present, with the development of printing technology, printing devices are also more and more widely used. Various printing media such as labels, signs, and temporary license plates can also be printed by small printers. Nowadays, most devices use a thermal print head to print printing consumables on the printing paper. And a transmission roller for transmitting the paper is often arranged below the thermal print head. When the print head presses down, it drives the printing consumable such as a carbon ribbon to contact the paper first, resulting in the carbon ribbon leaving an imprint on the paper, thus causing a poor printing effect.

[0003] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently in the industry. Summary of the Utility Model

[0004] Purpose of the utility model: In order to overcome the deficiencies in the prior art, the utility model provides a printing device that can avoid the carbon ribbon leaving an imprint on the printing medium.

[0005] Technical solution: A printing device includes:

[0006] A printing paper conveying channel;

[0007] A printing consumable transmission mechanism for conveying the printing consumable to the printing position;

[0008] A printing mechanism arranged above the printing paper conveying channel, including a thermal head and a thermal head lifting component for transferring the printing consumable to the printing paper. The thermal head is configured to be switchable between a first position and a second position. When in the first position, the thermal head is close to the printing position for transferring the printing consumable to the printing paper. When in the second position, it enters a non-printing state. The thermal head lifting component is used to lift the thermal head to the second position or lower it to the first position according to a predetermined instruction;

[0009] The printing mechanism further includes a pressure roller arranged on the front side of the printing mechanism for pressing the printing paper and making the printing paper that has not entered the printing position away from the printing consumable in transmission.

[0010] Furthermore, the printing mechanism further includes two vertically and oppositely arranged mounting plates. The mounting plates are driven and connected to the thermal head lifting component through a fixing plate, so that the mounting plates rotate between the first position and the second position;

[0011] The thermal head is connected to the mounting plate through a fixing component. A printing consumable transfer roller and the pressure roller are arranged on the front side of the mounting plate from high to low.

[0012] Further, at least one end of the pressure roller is provided with a quick-release component, including a first bearing mounted on the mounting plate, and a plug-in end that can move under the action of axial pressure. One end of the plug-in end is inserted into the end of the pressure roller, and the other end is inserted into the first bearing.

[0013] Further, a gasket is sleeved on the plug-in end, and an elastic member is arranged outside the gasket, and the elastic member abuts against the first bearing.

[0014] Further, the other end of the pressure roller is configured with an insertion part having an arc or an inclined surface, and a second bearing for accommodating the insertion part is provided on the corresponding mounting plate.

[0015] Further, the printing consumable transmission mechanism includes a unwind roller and a windup roller. The printing consumable released by the unwind roller passes through the printing consumable transfer roller, enters the printing position under the thermal head, and is finally recycled to the windup roller.

[0016] Beneficial effects: In the printing device of the present utility model, by arranging the pressure roller to press the passing printing paper, it is ensured that the printing paper keeps a distance gap from the printing consumable as much as possible before entering the printing position, thereby avoiding the printing consumable from leaving marks on the printing paper, improving the printing effect, having a simple structure, being easy to manufacture and repair, and being suitable for large-scale promotion. Description of the Drawings

[0017] Attached Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the printing device of the present utility model;

[0018] Attached Figure 2 is Figure 1 a cross-sectional schematic diagram of the shown printing device;

[0019] Attached Figure 3 is Figure 2 an enlarged schematic diagram of part A of the shown printing device;

[0020] Attached Figure 4 is Figure 1 a three-dimensional schematic diagram of the pressure roller part of the shown printing device. Detailed Embodiments

[0021] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0022] It should be noted that the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0023] See Figures 1 to 4 An embodiment of a printing device of the present utility model as shown. In this embodiment, the printing device is applied to a sign printer, and in other embodiments, it can also be applied to other types of printers, and no limitation is imposed thereon. The printing device includes: a printing paper conveying channel 1, a printing consumable transmission mechanism, and a printing mechanism.

[0024] The printing paper conveying channel 1 includes a plurality of transmission rollers 11 for conveying the printing paper to the printing position. The printing consumable transmission mechanism is used to convey the printing consumables to the printing position.

[0025] The printing mechanism is disposed above the printing paper conveying channel 1 and includes a thermal head 3 for transferring the printing consumables onto the printing paper and a thermal head lifting assembly 2. The thermal head 3 is configured to be rotatably switched between a first position and a second position. Moreover, when the thermal head 3 is in the first position, the thermal head 3 is close to the printing position for transferring the printing consumables onto the printing paper, and when in the second position, it enters a non-printing state. The thermal head lifting assembly 2 is used to lift the thermal head 3 to the second position or lower it to the first position according to a predetermined command.

[0026] The printing mechanism further includes a pressure roller 32 disposed in front of the printing mechanism for pressing the printing paper and keeping the printing paper that has not entered the printing position away from the printing consumables in transmission.

[0027] By setting the pressure roller 32, the passing printing paper is pressed to ensure that the printing paper maintains a distance gap from the printing consumables as much as possible before entering the printing position, thereby avoiding the printing consumables from leaving marks on the printing paper, improving the printing effect, having a simple structure, being easy to manufacture and repair, and being suitable for large-scale promotion.

[0028] When the pressure roller 32 is not set, the printing paper is very likely to be in direct contact with the printing consumables, resulting in the printing consumables being contaminated on the printing paper and thus illegal marks appearing; while when the pressure roller 32 is set, the pressure roller 32 is used to press the printing paper to keep it away from the printing consumables.

[0029] Specifically, the printing mechanism further includes two vertically and oppositely arranged mounting plates 31. The mounting plates 31 are drivingly connected to the thermal head lifting assembly 2 through fixing plates, so that the mounting plates 31 rotate between a first position and a second position.

[0030] The thermal head 3 is connected to the mounting plate 31 through a fixing component. A printing consumable transfer roller and the pressure roller 32 are arranged on the front side of the mounting plate 31 from high to low. Through the setting of the mounting plate 31 and connecting the mounting plate 31 with the thermal head lifting assembly 2 and the pressure roller 32, the pressure roller 32 is lifted / descended together with the thermal head 3, maintaining the synchronization of pressing the paper and printing the paper, and using the same driving mechanism to achieve the effect of driving two components simultaneously, which is more energy-saving and has high reliability.

[0031] In some preferred embodiments, quick-release components are provided at one or both ends of the pressure roller 32, including a first bearing 324 mounted on the mounting plate 31 and a plug-in end portion 321 that can move under the action of axial pressure. One end of the plug-in end portion 321 is inserted into the end portion of the pressure roller 32, and the other end is inserted into the first bearing 324. By setting the quick-release components, the pressure roller 32 can be quickly disassembled and assembled, with higher practicality.

[0032] Specifically, a gasket is sleeved on the plug-in end portion 321, and an elastic member 323 is provided outside the gasket. The elastic member 323 abuts against the first bearing 324. When the pressure roller 32 needs to be disassembled, by moving the plug-in end portion 321 to compress the elastic member 323, the plug-in end portion 321 is made to penetrate deeper into one end of the first bearing 324, so that the other end of the plug-in end portion 321 is separated from the pressure roller 32, and thus the pressure roller 32 can be taken out. When assembling the pressure roller 32, it is only necessary to move the plug-in end portion 321 to make the plug-in end portion 321 penetrate deeper into one end of the first bearing 324, and then cooperate the plug-in end portion 321 with the pressure roller 32 to return to the initial position.

[0033] In some preferred embodiments, the other end of the pressure roller 32 is configured with an insertion portion 322 having an arc or an inclined surface, and a second bearing for accommodating the insertion portion is provided on the corresponding mounting plate 31. This method is relatively simple and has high reliability.

[0034] In some preferred embodiments, the printing consumable transmission mechanism includes an unwinding wheel 51 and a winding wheel 52. The printing consumable unwound from the unwinding wheel 51 passes through the printing consumable transmission roller and enters the printing position under the thermal head 3 and is finally recycled to the winding wheel 52. Tension is provided between the unwinding wheel 51 and the winding wheel 52 by arranging the printing consumable transmission roller to ensure the tension of the printing consumable.

[0035] The above are only the preferred embodiments of the present invention. It should be noted that: for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A printing device, characterized in that: include: Printing paper conveying channel; The printing consumables conveying mechanism is used to convey the printing consumables to the printing position; The printing mechanism disposed above the substrate paper conveying passage comprises a thermal head for transferring printing consumables onto the substrate paper and a thermal head lifting assembly, wherein the thermal head is configured to be switchable between a first position and a second position, and when in the first position, the thermal head is close to the substrate position for transferring printing consumables onto the substrate paper, and when in the second position, the thermal head enters a non-printing state, and the thermal head lifting assembly is used to lift the thermal head to the second position or lower it to the first position according to a predetermined instruction; The printing mechanism further comprises a pressure roller arranged at the front side of the printing mechanism, which is used for pressing the printing paper and making the printing paper which has not entered the printing position stay away from the printing consumables being transported.

2. The printing device according to claim 1, characterized in that: The printing mechanism further comprises two mounting plates arranged vertically and opposite to each other, wherein the mounting plates are connected to the thermal head lifting assembly by driving via a fixing plate, so that the mounting plates are rotated between a first position and a second position; The thermal head is connected to the mounting plate through a fixing assembly, and a printing material transport roller and the pressure roller are arranged on the front side of the mounting plate from top to bottom.

3. The printing device according to claim 2, characterized in that: At least one end of the pressure roller is provided with a quick-release assembly, including a first bearing mounted on the mounting plate, and a plug-in end portion that can move under the action of axial pressure, one end of the plug-in end portion is plugged into the end of the pressure roller, and the other end is plugged into the first bearing.

4. The printing device according to claim 3, characterized in that: A gasket is sleeved on the plug-in end portion, an elastic member is arranged on the outer side of the gasket, and the elastic member abuts against the first bearing.

5. The printing device according to claim 4, characterized in that: The other end of the pressing roller is configured as an insertion portion having an arc or an inclined surface, and a second bearing for accommodating the insertion portion is provided on the corresponding mounting plate.

6. The printing device according to claim 2, characterized in that: The printing consumables transmission mechanism comprises a unwinding wheel and a rewinding wheel. The printing consumables released by the unwinding wheel pass through the printing consumables transmission roller into the printing position below the thermal head and are finally recovered to the rewinding wheel.

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