Gear structure for reducing transmission noise of automatic uncovering gear of printer and printer

Abstract

The utility model discloses a gear structure for reducing the transmission noise of an automatic uncovering gear of a printer and the printer, and the gear structure for reducing the transmission noise of the automatic uncovering gear of the printer comprises an automatic uncovering gear structure, the automatic uncovering gear structure comprises a second driven wheel and a fixed shaft, and the fixed shaft is arranged in a shaft hole of the second driven wheel; buffer pieces are arranged between one side or two sides of the second driven wheel and the adjacent side wall. According to the gear structure capable of reducing the transmission noise of the automatic cover opening gear of the printer, the buffer plate is additionally arranged between one side or two sides of the second driven wheel and the adjacent side wall and used for filling the gap between the second driven wheel and the side wall and buffering the force generated when the second driven wheel shakes, so that the transmission noise of the automatic cover opening gear of the printer is reduced. The noise generated when the second driven wheel rotates can be greatly reduced, and the problem of gear transmission noise of the automatic uncovering transmission structure of the printer under low precision is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a gear structure for reducing transmission noise of automatic cover-opening gears of printers and a printer. Background Art

[0002] Due to the limitations of the installation location, installation space, and motor drive costs, the gear structure in the automatic cover opening mechanism of a micro printer is mostly a motor-driven first driven wheel, which in turn drives the second driven wheel, and the second driven wheel triggers the automatic cover opening mechanism to achieve automatic cover opening. In existing structures, the first driven wheel is generally a small gear, and the second driven wheel is generally a second driven wheel. At present, the precision requirements for the gear transmission of the cover opening mechanism are not very high. Due to factors such as production costs, the second driven wheel of the automatic cover opening gear structure will shake during rotation, which is prone to generating sounds and noises. Therefore, how to solve the gear transmission noise of the automatic cover opening transmission structure of the printer has become an urgent problem that printing engineers need to solve. Utility Model Content

[0003] To solve the above technical problems, the present invention provides a gear structure and a printer for reducing transmission noise of an automatic cover opening gear of a printer, wherein the gear structure for reducing transmission noise of an automatic cover opening gear of a printer includes an automatic cover opening gear structure; the automatic cover opening gear structure includes a second driven wheel and a fixed shaft, wherein the fixed shaft is arranged in an axial hole of the second driven wheel, wherein:

[0004] A buffer sheet is provided between one side or both sides of the second driven wheel and the adjacent side wall.

[0005] Preferably, the buffer sheet is made of wear-resistant material.

[0006] Preferably, it further includes a fastener; the fastener passes through the buffer plate and the shaft hole of the second driven wheel and is connected to the fixed shaft end.

[0007] Preferably, the fastener pre-tightens the buffer sheet.

[0008] Preferably, the diameter of the through hole of the buffer plate is smaller than the diameter of the shaft hole of the second driven wheel.

[0009] Preferably, an extension portion is provided at the end of the fastener.

[0010] Preferably, the fastener is detachably connected to the fixed shaft end.

[0011] The utility model also provides a printer that adopts any of the above-mentioned gear structures for reducing the transmission noise of the automatic cover opening gear of the printer.

[0012] The utility model provides a gear structure for reducing the transmission noise of the automatic cover opening gear of the printer. By adding a buffer sheet between one side or both sides of the second driven wheel and the adjacent side wall, the buffer sheet is used to fill the gap between the second driven wheel and the side wall and buffer the force when the second driven wheel shakes. The noise when the second driven wheel rotates can be greatly reduced, and the problem of gear transmission noise of the automatic cover opening transmission structure of the printer under low precision is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A side view of a gear structure for reducing transmission noise of a printer's automatic cover opening gear provided by an embodiment of the present invention;

[0014] Figure 2 An exploded view of the gear structure used to reduce transmission noise in the printer's automatic cover opening gear.

[0015] Figure 3 is a three-dimensional diagram of a fastener;

[0016] Figure 4 is a perspective view of the second driven wheel;

[0017] Among them: 11, second driven wheel; 12, fixed shaft; 13, first driven wheel; 14, driving device shaft; 20, buffer plate; 30, fastener; 31, extension part. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model in specific circumstances.

[0021] The utility model provides a gear structure for reducing transmission noise of an automatic cover opening gear of a printer and a printer, wherein the gear structure for reducing transmission noise of an automatic cover opening gear of a printer includes an automatic cover opening gear structure; the automatic cover opening gear structure includes a second driven wheel 11 and a fixed shaft 12, wherein the fixed shaft 12 is arranged in an axial hole of the second driven wheel 11, wherein:

[0022] A buffer sheet 20 is provided between one side or both sides of the second driven wheel 11 and the adjacent side wall.

[0023] When implementing it specifically, Figures 1-4 As shown, the gear structure for reducing the transmission noise of the automatic cover opening gear of the printer includes an automatic cover opening gear structure; the automatic cover opening gear structure includes a second driven wheel 11, a fixed shaft 12, a first driven wheel 13 and a driving device shaft 14, the driving device shaft 14 is provided with a gear and meshes with the first driven wheel 13; the first driven wheel 13 meshes with the second driven wheel 12; the fixed shaft 12 is arranged in the shaft hole of the second driven wheel 11, the automatic cover opening gear structure is a prior art, and its principle for realizing automatic cover opening is a prior art, which will not be repeated here; the gear structure for reducing the transmission noise of the automatic cover opening gear of the printer provided in this embodiment, by adding a buffer plate 20 between one side or both sides of the second driven wheel 11 and the adjacent side wall, is used to fill the gap between the second driven wheel 11 and the side wall, and buffer the force when the second driven wheel 11 shakes, which can greatly reduce the noise when the second driven wheel 11 rotates, and effectively solves the problem of gear transmission noise of the automatic cover opening transmission structure of the printer under low precision.

[0024] Furthermore, the buffer sheet 20 is made of wear-resistant material.

[0025] In a specific implementation, the buffer sheet 20 is made of wear-resistant materials such as silicone and rubber to increase the service life of the buffer sheet 20.

[0026] Furthermore, a fastener 30 is included; the fastener 30 passes through the buffer plate 20 and the shaft hole of the second driven wheel 11 and is connected to the end of the fixed shaft 12.

[0027] When implementing it specifically, Figure 1 、 Figure 2As shown, the gear structure for reducing transmission noise in the printer's automatic cover opening gear also includes a fastener 30; the fastener 30 passes through the buffer plate 20 and the axial hole of the second driven wheel 11 and is connected to the end of the fixed shaft 12. The fastener 30 can be used to restrain the buffer plate 20 on one or both sides of the second driven wheel 11, thereby freeing the buffer plate 20 from being restricted by the side walls of the printer housing, thereby providing greater design flexibility for the printer housing structure.

[0028] Furthermore, the fastener 30 pre-tightens the buffer sheet 20 .

[0029] In a specific implementation, the fastener 30 provides a certain preload force to the buffer plate 20 (this preload force is limited to the second driven wheel 11 being able to rotate about the fixed axis 12), which can reduce the shaking of the second driven wheel 11. In this embodiment, the preload force between the fastener 30 and the buffer plate 20 can further reduce the shaking of the second driven wheel 11.

[0030] Furthermore, the diameter of the through hole of the buffer plate 20 is smaller than the diameter of the shaft hole of the second driven wheel 11 .

[0031] In specific implementation, the diameter of the through hole of the buffer plate 20 is smaller than the diameter of the shaft hole of the second driven wheel 11. When the length of the fixed shaft 12 does not match the shaft hole depth of the second driven wheel 11, the pre-tightened buffer plate 20 can eliminate the adverse effects such as unstable gear operation caused by the mismatch between the length of the fixed shaft 12 and the shaft hole depth of the second driven wheel 11 (for example, the length of the fixed shaft 12 is slightly larger than the shaft hole depth of the second driven wheel 11), thereby improving the stability and reliability of the entire transmission system when the error between the length of the fixed shaft 12 and the shaft hole depth of the second driven wheel 11 is eliminated.

[0032] Furthermore, an extension portion 31 is provided at the end of the fastener 30 .

[0033] When implementing it specifically, Figure 3 As shown, an extension portion 31 is provided at the end of the fastener 30 , and the extension portion 31 improves the limiting stability of the fastener 30 .

[0034] Preferably, the extension portion 31 can also be provided separately from the fastener 30 , and the extension portion 31 includes but is not limited to a gasket made of metal, alloy, etc. The fastener 30 passes through the metal gasket and the buffer sheet 20 and is connected to the fixed shaft 12 .

[0035] Furthermore, the fastener 30 is detachably connected to the end of the fixed shaft 12 .

[0036] In a specific implementation, a threaded hole is provided at the end of the fixed shaft 12; the fastener 12 is a bolt; and the bolt is connected to the threaded hole to achieve a detachable connection between the fastener 30 and the end of the fixed shaft 12. In this embodiment, by providing the fastener 30 with a detachable structure, it is convenient to replace the buffer sheet or perform printer maintenance.

[0037] The utility model also provides a printer that adopts any of the above-mentioned gear structures for reducing the transmission noise of the automatic cover opening gear of the printer.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gear structure that reduces transmission noise of the printer's automatic cover opening gear, characterized by: The invention comprises an automatic cover opening gear structure; the automatic cover opening gear structure comprises a second driven wheel (11) and a fixed shaft (12), the fixed shaft (12) being arranged in the shaft hole of the second driven wheel (11), wherein: A buffer sheet (20) is provided between one side or both sides of the second driven wheel (11) and the adjacent side wall.

2. The gear structure for reducing transmission noise of the automatic cover opening gear of a printer according to claim 1, characterized in that: The buffer sheet (20) is made of wear-resistant material.

3. The gear structure for reducing transmission noise of the automatic cover opening gear of a printer according to claim 1 or 2, characterized in that: It also includes a fastener (30); the fastener (30) passes through the buffer plate (20) and the shaft hole of the second driven wheel (11) and is connected to the end of the fixed shaft (12).

4. The gear structure for reducing transmission noise of the automatic cover opening gear of a printer according to claim 3, characterized in that: The fastener (30) pre-tightens the buffer sheet (20).

5. The gear structure for reducing transmission noise of the automatic cover opening gear of a printer according to claim 4, characterized in that: The diameter of the through hole of the buffer plate (20) is smaller than the diameter of the shaft hole of the second driven wheel (11).

6. The gear structure for reducing transmission noise of the automatic cover opening gear of a printer according to claim 3, characterized in that: An extension portion (31) is provided at the end of the fastener (30).

7. The gear structure for reducing transmission noise of the automatic cover opening gear of a printer according to claim 5 or 6, characterized in that: The fastener (30) is detachably connected to the end of the fixed shaft (12).

8. A printer, characterized in that: A gear structure for reducing transmission noise of a printer automatic cover opening gear as described in any one of claims 1 to 7 is adopted.

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