Dustproof structure for machine core of thermal printer

Abstract

A dustproof structure of a thermal printer core comprises a rack, a gear cover and a rubber roller, the gear cover is arranged on the side edge of the rack, the rubber roller is rotatably arranged on the rack, a rubber roller gear is arranged at the end of the rubber roller, a gear box is enclosed by the gear cover and the rack, and the gear box is arranged on the rack. A change gear set at least comprising a first gear and a second gear is arranged in the gear box, the rubber roller gear is meshed with the change gear set, and a placing port for the rubber roller gear to extend into is formed in the upper end of the gear box; a dust collecting plate or a dust collecting net which divides the inner space of the gear box into a first cavity located on the upper portion and a second cavity located on the lower portion is arranged on the inner side of the gear box, and the containing port is formed in the upper end of the first cavity. A dust collecting plate or a dust collecting net is arranged in the gear box, falling dust particles can be collected and cleaned in a unified mode, dust is prevented from entering the second cavity, and gear abrasion or clamping is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of printing devices, in particular to a dust-proof structure of a thermal printer core. Background Art

[0002] During use, thermal printers mainly rely on meshing gears to drive the rubber roller to rotate to achieve paper feeding. The speed change gear set is located on one side of the printer frame and is located in the gear box formed by the frame and the gear cover. A motor is installed at the bottom of the printer to provide power for the gear transmission.

[0003] However, the upper structure of the existing thermal printer gearbox is generally open. During use, dust and other impurities can easily enter the gearbox from the top opening. When impurities adhere to the gears, they will cause abnormal noise in the gear transmission, which will affect the transmission of the gears inside the printer and increase the wear of the gears, ultimately reducing the service life of the gears. When cleaning the gearbox, the printer needs to be shut down and the gear cover removed, which is inconvenient during the cleaning process. Therefore, it is necessary to further improve the structure inside the thermal printer movement. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a thermal printer movement dustproof structure to prevent dust particles from entering the gear interior in view of the above technical status;

[0005] The second technical problem to be solved by the utility model is to provide a dust-proof structure for a thermal printer core that is convenient for centralized cleaning of dust particles in view of the above-mentioned existing technical status.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a dust-proof structure of a thermal printer movement, comprising a frame, a gear cover and a rubber roller, wherein the gear cover is arranged on the side of the frame, the rubber roller is rotatably arranged on the frame, a rubber roller gear is arranged at the end of the rubber roller, the gear cover and the frame enclose a gear box, a speed change gear set is arranged in the gear box, the rubber roller gear is meshed with the speed change gear set, and a placement port for the rubber roller gear to extend into is formed at the upper end of the gear box, characterized in that: the speed change gear set includes at least a first gear and a second gear, a dust collecting plate or a dust collecting net is arranged on the inner side of the gear box, the dust collecting plate or the dust collecting net divides the internal space of the gear box into a first chamber located at the top and a second chamber located at the bottom, and the placement port is formed at the upper end of the first chamber.

[0007] In order to simplify the installation steps, preferably, the dust collecting plate is integrally formed with the frame. The dust collecting plate and the frame are processed into an integrated structure through a process, and the dust collecting plate does not need to be installed additionally, thereby improving the installation efficiency.

[0008] In order to increase the dust collection space, preferably, at least one concave dust collection groove is provided on the dust collection plate. Dust particles enter the gear box and fall onto the dust collection plate under the action of gravity, and the concave dust collection groove forms a space for accommodating dust particles; at the same time, when the printer body is tilted or moved, dust particles will not adhere to the gears.

[0009] In order to facilitate cleaning or replacement, the dust collecting net is preferably detachably arranged in the gear box, and the two ends of the dust collecting net are arranged in the mounting grooves of the gear box. Dust particles are concentrated on the dust collecting net, which needs to be cleaned regularly. During the cleaning process, the gear cover needs to be opened and the gear needs to be disassembled. The dust collecting net needs to be removed for cleaning or replacement, and then installed for continued use.

[0010] In order to reasonably utilize the gearbox space, preferably, the first gear is arranged in the second chamber, including a first small tooth portion close to the gear cover and a first large tooth portion away from the gear cover; a second gear is arranged above the first gear, and the second gear includes a second large tooth portion close to the gear cover and a second small tooth portion away from the gear cover. The first gear at the bottom and the second gear at the top mesh with each other, thereby realizing the overall linkage of the speed change gear set.

[0011] In order to effectively block dust, preferably, the dust collecting plate or dust collecting net is arranged above the first large tooth portion, and the width of the dust collecting plate or dust collecting net is greater than or equal to the thickness of the meshing tooth surface of the first large tooth portion. Among them, only when the width of the dust collecting plate or dust collecting net is greater than the thickness of the meshing tooth surface of the first large gear can the dust particles above be blocked to prevent them from falling downwards.

[0012] In order to provide power for the operation of the printer, preferably, a motor is provided on the side of the frame, and a driving gear is connected to the output end of the motor, the driving gear meshes with the first large tooth portion, the first small tooth portion meshes with the second large tooth portion, and the second small tooth portion meshes with the rubber roller gear. Wherein, a motor is provided on the side of the thermal printer, and the motor can provide power for the driving gear on its output end, the driving gear meshes with the first large tooth portion in the first gear, thereby driving the first large tooth portion to maintain linkage with it, the first large tooth portion and the first small tooth portion are double gears to maintain linkage; the first small tooth portion meshes with the second large tooth portion of the second gear, thereby driving the second large tooth portion to maintain linkage with it, the second large tooth portion and the second small tooth portion are double gears to also maintain linkage, the second small tooth portion meshes with the rubber roller gear above it, thereby driving the rubber roller gear to maintain linkage with the entire speed change gear set, and the rubber roller can maintain a rotating state under the drive of the rubber roller gear.

[0013] In order to facilitate the installation of the gear cover, preferably, a clamping block is provided at the top and / or bottom of the gear cover, and the clamping block matches with the clamping groove provided on the frame. After the clamping block of the gear cover is clamped in the clamping groove of the frame, the gear cover can be connected to the frame.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. A dust collecting plate or dust collecting net is arranged inside the gear box of the thermal printer, the second pinion is arranged on the dust collecting plate or dust collecting net, and the gears of the remaining speed gear set and the motor gear are arranged in a closed second chamber under the dust collecting plate or dust collecting net. Dust particles will not enter the second chamber, thereby preventing the gears from being worn and stuck;

[0016] 2. A dust collecting plate or dust collecting net is set on the inside of the gear box, and dust particles fall on the dust collecting plate or dust collecting net, which is convenient for centralized cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the decomposition of

[0019] Figure 3 for Figure 1 Another exploded schematic diagram of ;

[0020] Figure 4 for Figure 1 Side view of (gear cover omitted);

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the rubber roller and the speed change gear set;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of Example 2 of the utility model (the gear cover is omitted);

[0023] Figure 7 for Figure 6 Side view of.

[0024] In the figure: 1. frame; 11. snap-in slot; 12. mounting slot; 2. gear cover; 21. snap-in block; 3. speed change gear set; 31. first gear; 311. first large tooth portion; 312. first small tooth portion; 32. second gear; 321. second large tooth portion; 322. second small tooth portion; 4. driving gear; 5. rubber roller gear; 6. dust collecting plate; 61. dust collecting slot; 7. dust collecting net; 8. gear box; 81. first chamber; 82. second chamber; 83. placement port; 9. rubber roller; 10. motor. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Example 1

[0027] like Figures 1 to 5 As shown, the dustproof structure of the thermal printer movement in this embodiment includes a frame 1, a gear cover 2 and a rubber roller 9. The gear cover 2 is arranged on the side of the frame 1, and the rubber roller 9 is rotatably arranged on the frame 1. A rubber roller gear 5 is arranged at the end of the rubber roller 9. The gear cover 2 and the frame 1 enclose a gear box 8. A speed change gear set 3 is arranged in the gear box 8. The rubber roller gear 5 is meshed with the speed change gear set 3. The speed change gear set 3 includes a first gear 31 and a second gear 32. A placement port 83 for the rubber roller gear 5 to extend into is formed at the upper end of the gear box 8. A dust collecting plate 6 is arranged on the inner side of the gear box 8. The dust collecting plate 6 divides the internal space of the gear box 8 into a first chamber 81 located at the top and a second chamber 82 located at the bottom. The placement port 83 is formed at the upper end of the first chamber 81.

[0028] The dust collecting plate 6 inside the gear box 8 can be designed as an integrated or split structure with the frame 1, see Figure 3 and Figure 4 In order to simplify the installation steps, the dust collecting plate 6 in this embodiment is preferably processed into an integrated structure with the frame 1, and the dust collecting plate 6 does not need to be installed separately, which improves the installation efficiency. Dust particles will fall onto the dust collecting plate 6 from the placement port 83 under the action of gravity. In order to increase the dust collecting space, the dust collecting plate 6 in this embodiment is provided with seven concave dust collecting grooves 61 (refer to Figure 3 and Figure 4 ), dust particles can be concentrated and stored in the dust collecting tank 61. At the same time, when the printer body is tilted or moved, dust particles will not adhere to the gears.

[0029] refer to Figure 4The speed gear set 3 inside the gear box 8 includes a first gear 31 and a second gear 32. The first gear 31 includes a first large tooth portion 311 and a first small tooth portion 312 that are kept in linkage. The first small tooth portion 312 is close to the gear cover 2, while the first large tooth portion 311 is far away from the gear cover 2. The second gear 32 includes a second large tooth portion 321 and a second small tooth portion 322 that are kept in linkage. The second large tooth portion 321 is close to the gear cover 2, while the second small tooth portion 322 is far away from the gear cover 2. The first gear 31 located at the lower part and the second gear 32 located at the upper part are meshed with each other, thereby realizing the overall linkage of the speed gear set 3. The dust collecting plate 6 is arranged above the first large tooth portion 311, and the width of the dust collecting plate 6 is greater than or equal to the thickness of the meshing tooth surface of the first large tooth portion 311. In order to improve the dust blocking effect, the preferred width of the dust collecting plate 6 in this embodiment is greater than the thickness of the meshing tooth surface of the first large tooth portion 311. The dust particles above are concentrated and stored in the dust collecting groove 61 of the dust collecting plate 6, thereby preventing the dust particles from falling into the second chamber 82. refer to Figures 1 to 3 The top and bottom of the gear cover 2 are provided with clamping blocks 21 , and the clamping blocks 21 cooperate with the clamping grooves 11 provided on the frame 1 , thereby realizing the installation and fixation of the gear cover 2 .

[0030] refer to Figures 1 to 3 A motor 10 is disposed on the side of the frame 1 , and an output end of the motor 10 is connected to a driving gear 4 , the driving gear 4 is meshed with the first large tooth portion 311 , the first small tooth portion 312 is meshed with the second large tooth portion 321 , and the second small tooth portion 322 is meshed with the rubber roller gear 5 . The motor 10 can provide power to the driving gear 4 on its output end. The driving gear 4 is meshed with the first large tooth portion 311 in the first gear 31, thereby driving the first large tooth portion 311 to maintain linkage with it. The first large tooth portion 311 and the first small tooth portion 312 are double gears and thus maintain linkage; the first small tooth portion 312 is meshed with the second large tooth portion 321 of the second gear 32, thereby driving the second large tooth portion 321 to maintain linkage with it. The second large tooth portion 321 and the second small tooth portion 322 are double gears and thus also maintain linkage. The second small tooth portion 322 is meshed with the rubber roller gear 5 above it, thereby driving the rubber roller gear 5 to maintain linkage with the entire speed change gear set 3. The rubber roller 9 can maintain a rotating state driven by the rubber roller gear 5, thereby participating in the printing of paper.

[0031] Example 2

[0032] The difference between this embodiment and the first embodiment is that the dust collecting component arranged in the gear box 8 is a dust collecting net 7, which is detachably arranged in the gear box 8, and the two ends of the dust collecting net 7 are arranged in the mounting grooves 12 of the gear box 8. Dust particles are concentrated on the dust collecting net 7, and need to be cleaned regularly. During the cleaning process, it is necessary to open the gear cover 2 and disassemble the gear, remove the dust collecting net 7, clean or replace it, and then install it for continued use. The remaining structures in this embodiment are the same as those in the first embodiment.

Claims

1. A dustproof structure for a thermal printer movement, comprising a frame (1), a gear cover (2) and a rubber roller (9), wherein the gear cover (2) is arranged on the side of the frame (1), the rubber roller (9) is rotatably arranged on the frame (1), a rubber roller gear (5) is arranged at the end of the rubber roller (9), the gear cover (2) and the frame (1) are enclosed to form a gear box (8), a speed change gear set (3) is arranged in the gear box (8), the rubber roller gear (5) is meshed with the speed change gear set (3), and a placement port (83) is formed at the upper end of the gear box (8) for the rubber roller gear (5) to extend into, characterized in that: The speed change gear set (3) comprises at least a first gear (31) and a second gear (32); a dust collecting plate (6) or a dust collecting net (7) is provided inside the gear box (8); the dust collecting plate (6) or the dust collecting net (7) divides the internal space of the gear box (8) into a first chamber (81) located at the top and a second chamber (82) located at the bottom; the placement port (83) is formed at the upper end of the first chamber (81).

2. The thermal printer core dustproof structure according to claim 1, characterized in that: The dust collecting plate (6) and the frame (1) are integrally formed.

3. The thermal printer core dustproof structure according to claim 2, characterized in that: The dust collecting plate (6) is provided with at least one concave dust collecting groove (61).

4. The thermal printer core dustproof structure according to claim 1, characterized in that: The dust collecting net (7) is detachably arranged inside the gear box (8), and both ends of the dust collecting net (7) are arranged in the mounting grooves (12) of the gear box (8).

5. The thermal printer core dustproof structure according to claim 2 or 4, characterized in that: The first gear (31) is arranged in the second chamber (82), and comprises a first small tooth portion (312) close to the gear cover (2) and a first large tooth portion (311) away from the gear cover (2); a second gear (32) is arranged above the first gear (31), and the second gear (32) comprises a second large tooth portion (321) close to the gear cover (2) and a second small tooth portion (322) away from the gear cover (2).

6. The thermal printer core dustproof structure according to claim 5, characterized in that: The dust collecting plate (6) or the dust collecting net (7) is arranged above the first large tooth portion (311), and the width of the dust collecting plate (6) or the dust collecting net (7) is greater than or equal to the thickness of the meshing tooth surface of the first large tooth portion (311).

7. The thermal printer core dustproof structure according to claim 6, characterized in that: A motor (10) is arranged on the side of the frame (1); an output end of the motor (10) is connected to a driving gear (4); the driving gear (4) meshes with the first large tooth portion (311); the first small tooth portion (312) meshes with the second large tooth portion (321); and the second small tooth portion (322) meshes with the rubber roller gear (5).

8. The thermal printer core dustproof structure according to claim 7, characterized in that: A clamping block (21) is provided on the top and / or bottom of the gear cover (2), and the clamping block (21) matches with a clamping groove (11) provided on the frame (1).

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