Dustproof structure of thermal printer core

Abstract

A dustproof structure of a thermal printer core, comprising a frame, a motor, a gear set, a gear cover and a rubber roller, characterized in that the frame side wall is provided with an inclined guide rib, which is located inside the gear box and divides the gear box interior space into a first chamber and a second chamber below the first chamber, the input gear is located in the first chamber, and the gear box side has a dust discharge hole, the inner side of which is adjacent to the lower end of the guide rib. The guide rib can guide the dust particles entering the gear box to the dust discharge hole, and finally discharge them out of the frame, avoiding the adhesion of dust particles to the gear set, and thus the wear or jamming of the gear. Dust particles do not need to be cleaned manually and can be automatically collected and discharged.

Description

Technical Field

[0001] This utility model relates to the field of printing device technology, specifically to a dustproof structure for a thermal printer mechanism. Background Technology

[0002] Thermal printers primarily rely on meshing gears to drive the rubber rollers to feed paper during operation. The speed-changing gear set is located on one side of the printer frame and is situated in the gearbox formed by the mating of the frame and the gear cover. A motor is located at the bottom of the printer to provide power for the gear transmission.

[0003] However, the upper structure of existing thermal printer gearboxes is generally open, allowing dust and other impurities to easily enter the gearbox through the top opening during use. When these impurities adhere to the gears, they cause abnormal noises in the gear transmission, affecting the internal gear transmission and accelerating gear wear, ultimately reducing the lifespan of the gears. Cleaning the gearbox requires stopping the printer and removing the gear cover, which is inconvenient. Therefore, further improvements to the internal structure of the thermal printer mechanism are needed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dustproof structure for the thermal printer core that can promptly discharge dust particles entering the gearbox, in view of the above-mentioned technical status.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a dustproof structure for a thermal printer mechanism, comprising...

[0006] frame;

[0007] A gear cover is located on one side of the aforementioned frame and forms a gearbox with the side wall of the frame;

[0008] A rubber roller is rotatably mounted on the aforementioned frame and has an input gear at its end, which is located at the port of the aforementioned gearbox;

[0009] An electric motor is mounted on the aforementioned frame and has an output gear located within the aforementioned gearbox;

[0010] A transmission gear set is located inside the aforementioned gearbox, with the power output end meshing with the aforementioned input gear and the power input end meshing with the aforementioned output gear;

[0011] The machine is characterized in that the side wall of the frame is provided with an inclined guide rib, which is located inside the gearbox and divides the internal space of the gearbox into a first chamber and a second chamber located below the first chamber. The input gear is located in the first chamber. The gearbox has a dust discharge hole on one side, which is opened on the inner side of the guide rib near the lower end.

[0012] Preferably, the gear set includes

[0013] The first gear, a double gear rotatably disposed within the gearbox, includes a first wheel portion and a second wheel portion coaxially rotatable with the first wheel portion. The aforementioned first wheel portion meshes with the output gear; and

[0014] The second gear is a double gear and is rotatably disposed in the gearbox. The second gear includes a third gear part and a fourth gear part that rotates coaxially with the third gear part. The aforementioned third gear part meshes with the second gear part, and the aforementioned fourth gear part meshes with the input gear.

[0015] Furthermore, the guide rib is located between the first wheel section and the fourth wheel section.

[0016] Preferably, the guide rib is S-shaped and includes an upper arc segment, which is connected to a lower arc segment.

[0017] Preferably, the outer periphery of the side wall of the frame is provided with a connecting wall surface, the gear cover is connected to the front end face of the connecting wall surface, and the dust discharge hole is opened on the connecting wall surface.

[0018] Preferably, the guide rib, connecting wall, and frame are integrated as a single unit.

[0019] Compared with existing technologies, the advantages of this invention are as follows: the guide ribs can direct dust particles entering the gearbox to the dust discharge hole, and finally discharge them outside the frame through the dust discharge hole, thus preventing dust particles from adhering to the transmission gear set and causing wear or jamming of the gears on the wall. Dust particles do not require manual cleaning and can be automatically collected and discharged. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment;

[0021] Figure 2 for Figure 1 Exploded view;

[0022] Figure 3 This is a three-dimensional sectional view of an embodiment.

[0023] Figure 4 for Figure 2 A structural schematic diagram of the second gear from another perspective.

[0024] Figure 5 This is a schematic diagram of the rack. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the thermal printer mechanism in this embodiment includes a frame 1, a gear cover 3, a rubber roller 2, a motor 4, and a speed-changing gear set.

[0027] The gear cover 3 is located on one side of the frame 1 and forms a gearbox 30 with the side wall of the frame 1; the rubber roller 2 is rotatably mounted on the frame 1 and has an input gear 21 at its end, which is located at the port of the gearbox 30; the motor 4 is mounted on the frame 1 and has an output gear 41, which is located inside the gearbox 30.

[0028] Combination Figure 4 As shown, the gear set is located inside the gearbox 30, with the power output end meshing with the input gear 21 and the power input end meshing with the output gear 41. In this embodiment, the gear set includes a first gear 6 and a second gear 5. The first gear 6 is a double gear and is rotatably located inside the gearbox 30. The first gear 6 includes a first wheel portion 62 and a second wheel portion 61 that rotates coaxially with the first wheel portion 62. The first wheel portion 62 meshes with the output gear 41. The second gear 5 is a double gear and is rotatably located inside the gearbox 30. The second gear 5 includes a third wheel portion 52 and a fourth wheel portion 51 that rotates coaxially with the third wheel portion 52. The third wheel portion 52 meshes with the second wheel portion 61, and the fourth wheel portion 51 meshes with the input gear 21.

[0029] Combination Figure 5 As shown, the side wall of the frame 1 is provided with an inclined guide rib 13. The guide rib 13 is located inside the gearbox 30 and divides the internal space of the gearbox 30 into a first chamber 1a and a second chamber 1b located below the first chamber 1a. The input gear 21 is located in the first chamber 1a. The gearbox 30 has a dust discharge hole 12 on one side. The dust discharge hole 12 is opened on the inner side near the lower end of the guide rib 13.

[0030] The guide rib 13 is located between the first wheel portion 62 and the fourth wheel portion 51. The guide rib 13 is S-shaped and includes an upper arc segment 131 connected to a lower arc segment 132. This is to guide the first wheel portion 62 and the fourth wheel portion 51.

[0031] In this embodiment, the outer periphery of the side wall of the frame 1 is provided with a connecting wall surface 11, the gear cover 3 is connected to the front end face of the connecting wall surface 11, and the dust discharge hole 12 is opened on the connecting wall surface 11. The guide rib 13, the connecting wall surface 11 and the frame 1 are integral parts.

[0032] Dust particles entering the gearbox accumulate on the upper surface of the guide ribs, then gather at the lower end of the guide ribs and are finally discharged from the dust exhaust port. This prevents dust particles from adhering to the gear set, thus avoiding wear or jamming of the gears. Dust particles do not require manual cleaning; collection and discharge are automatic.

Claims

1. A dustproof structure for a thermal printer mechanism, comprising: Rack (1); Gear cover (3) is provided on one side of the aforementioned frame (1) and together with the side wall of the frame (1) to form a gearbox (30); The rubber roller (2) is rotatably mounted on the aforementioned frame (1) and has an input gear (21) at its end, which is located at the port of the aforementioned gearbox (30); The motor (4) is mounted on the aforementioned frame (1) and has an output gear (41) located inside the aforementioned gearbox (30); The transmission gear set is located in the aforementioned gearbox (30), with the power output end meshing with the aforementioned input gear (21) and the power input end meshing with the aforementioned output gear (41); Its features The frame (1) has an inclined guide rib (13) protruding from its side wall. The guide rib (13) is located inside the gearbox (30) and divides the internal space of the gearbox (30) into a first chamber (1a) and a second chamber (1b) located below the first chamber (1a). The input gear (21) is located in the first chamber (1a). The gearbox (30) has a dust discharge hole (12) on one side. The dust discharge hole (12) is opened on the inner side of the guide rib (13) near the lower end.

2. The dustproof structure of the thermal printer mechanism according to claim 1, characterized in that... The aforementioned gear set includes The first gear (6) is a double gear and is rotatably disposed in the gearbox (30). The first gear (6) includes a first wheel part (62) and a second wheel part (61) that rotates coaxially with the first wheel part (62). The aforementioned first wheel part (62) meshes with the output gear (41). as well as The second gear (5) is a double gear and is rotatably disposed in the gearbox (30). The second gear (5) includes a third gear part (52) and a fourth gear part (51) that rotates coaxially with the third gear part (52). The aforementioned third gear part (52) meshes with the second gear part (61), and the aforementioned fourth gear part (51) meshes with the input gear (21).

3. The dustproof structure for the thermal printer mechanism according to claim 2, characterized in that... The guide rib (13) is located between the first wheel portion (62) and the fourth wheel portion (51).

4. The dustproof structure of the thermal printer mechanism according to claim 3, characterized in that... The guide rib (13) is S-shaped and includes an upper arc segment (131) and a lower arc segment (132) connected to the upper arc segment (131).

5. The dustproof structure for the thermal printer mechanism according to claim 1, characterized in that... The outer periphery of the side wall of the frame (1) is provided with a connecting wall surface (11), the gear cover (3) is connected to the front end of the connecting wall surface (11), and the dust discharge hole (12) is opened on the connecting wall surface (11).

6. The dustproof structure for the thermal printer mechanism according to claim 5, characterized in that... The guide rib (13), the connecting wall (11) and the frame (1) are an integral part.

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