Improved cutter gear sealing structure capable of preventing paper scraps from being rolled in

Abstract

The utility model provides an improved cutter gear sealing structure capable of preventing paper scraps from being rolled in, which comprises a gear box, a cutter speed reduction gear is rotatably arranged in the gear box, and at least part of the cutter speed reduction gear protrudes out of a gap formed between the gear box and a conveying belt supporting seat; the synchronous belt rotating wheel comprises a driving gear and a transmission gear coaxially arranged with the driving gear, and the transmission gear is meshed with the cutter reduction gear; the gear separation sleeve seat is arranged between the driving gear and the transmission gear and used for separating the driving gear out of the transmission gear and the notch, and the gear separation sleeve seat is arranged between the driving gear and the transmission gear, so that the driving gear is effectively separated out of the transmission gear and the notch; therefore, paper scraps are prevented from entering the gear box through a gap between the gear box and the conveying belt supporting seat in the process that the conveying belt is driven by the driving motor, the risk that gear operation is blocked is remarkably reduced, normal operation of the printer is guaranteed, and the service life of the printer is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of printer cutter structures, in particular to an improved cutter gear sealing structure for preventing paper scraps from being rolled in. Background Art

[0002] In the modern office environment, printers play a vital role as key equipment for information output. Their functions include converting text and images in electronic documents into physical paper documents for easy reading, archiving and dissemination. However, traditional A4 thermal printers often lack an automatic cutting mechanism when processing printing tasks, which requires users to tear paper manually during use. This operation not only reduces work efficiency, but may also cause uneven edges of the paper due to human factors, affecting the aesthetics and professionalism of the printouts.

[0003] In view of this, the applicant recently proposed an automatic cutter device integrated in a printer (China Announcement No.: CN114368023A). The core design of the device includes a horizontally placed fixed blade and a circular cutting blade slidably connected to it. The fixed blade is designed to tilt downward, forming an acute angle of less than 90 degrees with the vertical direction, ensuring the stability and accuracy of the cutting process. The front end of the circular cutter fits tightly against the edge of the fixed blade, while the rear end forms an acute angle with the fixed blade. This structural layout effectively improves the cutting efficiency while reducing damage to the printing medium.

[0004] The above scheme realizes the movement of the cutting blade through the conveyor belt and the driving assembly, and the driving assembly includes a gear box and a driving motor, wherein the driving assembly is composed of the gear box and the driving motor, and the meshing action of the side gears ensures the effective transmission of the motor power to the conveyor belt. In order to achieve smooth meshing between the gears, a certain gap is usually reserved between the gear box and the support seat of the conveyor belt to facilitate the gears to rotate smoothly.

[0005] Therefore, although the above design improves the paper cutting efficiency to a certain extent, during the operation of the cutter, the paper scraps generated may enter the gear box through the gap between the gear box and the conveyor belt support. Long-term accumulation will cause the gear operation to be obstructed or even completely stuck, seriously affecting the normal operation and service life of the printer.

[0006] In view of this, how to effectively prevent paper scraps from entering the gear box and avoid mechanical failure has become an urgent problem to be solved.

[0007] In view of this, the inventor specially designed an improved cutter gear sealing structure to prevent paper scraps from being drawn in, and the present invention was thus created. Utility Model Content

[0008] In order to solve the problems of paper scrap management and mechanical protection in the above-mentioned cutter structure, the technical solution of the utility model is as follows:

[0009] An improved cutter gear sealing structure for preventing paper scraps from being drawn in comprises:

[0010] A gear box, in which a cutter reduction gear is rotatably arranged, wherein the cutter reduction gear at least partially protrudes from a gap formed between the gear box and the conveyor belt support seat;

[0011] The synchronous belt rotating wheel comprises a driving gear and a transmission gear coaxially arranged with the driving gear, the transmission gear is meshed with the cutter reduction gear, and the driving gear is used to drive the conveyor belt;

[0012] The gear separation sleeve is arranged between the driving gear and the transmission gear, and is used for separating the driving gear from the transmission gear and the gap.

[0013] Preferably, a connecting section is integrally provided between the driving gear and the transmission gear, and a first mounting hole is integrally provided through the driving gear, the connecting section and the transmission gear along the axial direction.

[0014] Preferably, the gear separation sleeve includes side plates and connecting plates extending vertically along the edges of the connecting plates. The side plates, connecting plates and corresponding mounting planes enclose a meshing space for the transmission gear to rotate. The gap is arranged at the bottom of the meshing space, and a clearance hole is opened on the side plates to match the outer diameter gap of the connecting section.

[0015] Preferably, the thickness of the relief hole is adapted to the extension length of the connecting section along its axial direction.

[0016] Preferably, the outer diameter of the connecting section is equal to the maximum outer diameter of the driving gear and the outer diameter of the transmission gear is larger than the driving gear.

[0017] Preferably, the gear box is also rotatably connected to a motor main gear and an intermediate gear, the intermediate gear includes an outer tooth with a larger outer diameter and an inner tooth coaxially arranged on one side of the outer tooth, one side of the outer tooth is meshed with the motor main gear, and the cutter reduction gear is meshed with the inner tooth so that the other side of the outer tooth forms an offset overlap with the cutter reduction gear.

[0018] Preferably, a second mounting hole for the output end of the driving motor to pass through is opened on the inner side wall of the gear box, and the axis of the motor main gear is fixedly connected to the output end of the driving motor.

[0019] Preferably, a motor baffle is provided on the inner wall of the gear box at the position of the second mounting hole, and one side of the motor baffle forms an opening structure with an arc-shaped groove, and the arc-shaped groove is adapted to the shape of the output end of the driving motor.

[0020] Preferably, an axle detection switch is also provided on one side of the top of the gear box.

[0021] Preferably, a cutter baffle that cooperates with the shaft detection switch is provided on the top of the gear box, and the cutter baffle is arranged on the movement trajectory of the circular cutter.

[0022] The beneficial effects of the utility model are as follows:

[0023] The utility model provides a gear separation sleeve between the driving gear and the transmission gear, thereby effectively isolating the driving gear from the transmission gear and the gap, thereby preventing paper scraps from entering the gear box through the gap between the gear box and the conveyor belt support seat during the transmission of the conveyor belt by the driving motor, significantly reducing the risk of obstruction in gear operation, ensuring the normal operation of the printer, and extending its service life.

[0024] Specifically, the structural design of the utility model has the following advantages:

[0025] First, the gear separation sleeve includes side plates and connecting plates, which together with the mounting plane form a meshing space for the transmission gear to rotate. At the same time, the clearance holes opened on the side plates match the outer diameter of the connecting section between the driving gear and the transmission gear, which not only ensures the normal operation of the gears, but also effectively blocks the invasion of paper scraps.

[0026] Secondly, the first mounting hole through which the driving gear, the connecting section and the transmission gear are integrally penetrated along the axial direction simplifies the assembly process and improves the stability of the structure.

[0027] In addition, by setting an intermediate gear with a larger outer diameter and internal and external teeth, power transmission between the motor main gear and the cutter reduction gear is achieved. At the same time, the staggered overlap of the internal and external teeth further optimizes the spatial layout, effectively reducing the lateral size of the gearbox while keeping its power transmission path stable, thereby enhancing the stability and efficiency of its transmission.

[0028] In particular, a motor baffle is arranged at the position of the second mounting hole opened on the inner wall of the gear box, and an arc groove adapted to the shape of the output end of the drive motor is formed, which not only facilitates the installation and positioning of the motor, but also enhances the sealing performance of the structure to prevent external impurities from entering.

[0029] In addition, by arranging an axis detection switch and a matching cutter baffle on the top of the gear box, the movement state of the circular cutter can be detected to ensure the accuracy and safety of the cutter action.

[0030] In summary, the utility model not only solves the problem of paper scraps being drawn into the gear box in the traditional cutter structure by optimizing the gear sealing structure between the gear box and the conveyor belt support seat, but also improves the operating efficiency and reliability of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0032] in:

[0033] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0034] Figure 2 It is a partial structural schematic diagram of the utility model;

[0035] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0036] Figure 4 It is a schematic diagram of a partial explosion structure highlighting a gearbox in the utility model;

[0037] Figure 5 It is a schematic diagram of a partial explosion structure highlighting the gear separation sleeve in the utility model;

[0038] Figure 6 It is a partial cross-sectional structural schematic diagram of the convex synchronous belt rotating wheel of the utility model;

[0039] Figure 7 It is a partial cross-sectional structural schematic diagram highlighting the gear box in the utility model;

[0040] Figure 8 It is a partial structural schematic diagram highlighting the meshing relationship of the intermediate gears in the utility model.

[0041] Description of labels:

[0042] 10. Support seat; 11. Conveyor belt; 12. Fixed knife; 13. Circular cutter; 14. Gap; 15. First opening slot; 20. Gear box; 21. Cutter reduction gear; 22. Bottom shell; 23. Cover plate; 24. Installation space; 25. Second opening slot; 26. Motor main gear; 27. Intermediate gear; 271. External teeth; 272. Internal teeth; 28. Motor baffle; 281. Arc slot; 30. Driving motor; 40. Synchronous belt rotating wheel; 41. Driving gear; 42. Transmission gear; 43. Connecting section; 44. First installation hole; 50. Gear separation sleeve; 51. Side plate; 52. Connecting plate; 53. Meshing space; 54. Clearance hole; 55. Locking seat; 60. Shaft detection switch; 70. Cutter baffle. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by 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.

[0044] As Figure 1-3 shown, for the various components included in the cutter structure, the cutter structure generally includes a support base 10, a conveyor belt 11, a fixed cutter 12, a circular cutter 13, a gearbox 20 and a driving motor 30. The cross-section of the support base 10 is in a "U" shape. The gearbox 20 is installed on one side of the bottom of the support base 10. The fixed cutter 12, the circular cutter 13 and the conveyor belt 11 are all installed on the support base 10. In particular, there is a notch with a relative position between the support base 10 and the gearbox 20 to form a through gap 14. One end of the conveyor belt 11 is meshed with the corresponding gear protruding from the gap 14 in the gearbox 20 through a side-mounted gear. The driving motor 30 is arranged on one side of the gearbox 20 to provide power for the meshing transmission of each gear. Finally, the output of the driving motor 30 drives the conveyor belt 11 to circulate and drive the circular cutter 13 to reciprocate relative to the fixed cutter 12 to complete the paper cutting process.

[0045] Please refer to Figures 1 to 8 , which is an improved cutter gear closed structure for preventing paper scraps from being involved as the best embodiment of the present utility model, including:

[0046] A gearbox 20, in which a cutter reduction gear 21 is rotatably arranged, and at least part of the cutter reduction gear 21 protrudes from the gearbox 20 into the gap 14 formed between the conveyor belt 11 and the support base 10;

[0047] A synchronous belt rotating wheel 40, including a driving gear 41 and a transmission gear 42 coaxially arranged with the driving gear 41. The transmission gear 42 is meshed with the cutter reduction gear 21, and the driving gear 41 is used to drive the conveyor belt 11;

[0048] A gear separating sleeve seat 50, which is arranged between the driving gear 41 and the transmission gear 42 and is used to separate the driving gear 41 from the transmission gear 42 and the notch.

[0049] In this embodiment, the gearbox 20 is arranged at one end of the support base 10 in the length direction and at the bottom position. The gearbox 20 is composed of a bottom shell 22 and a cover plate 23 which are spliced left and right. An installation space 24 is formed inside the bottom shell 22 and the cover plate 23 for the cutter reduction gear 21, the synchronous belt rotating wheel 40 and a motor main gear 26 which is in transmission connection with the output end of the driving motor 30 to achieve rotational fixation.

[0050] Preferably, as Figure 5 , 6As shown, a connecting section 43 is integrally provided between the driving gear 41 and the transmission gear 42 , and a first mounting hole 44 is integrally provided through the driving gear 41 , the connecting section 43 and the transmission gear 42 along the axial direction.

[0051] Furthermore, the gear separation sleeve 50 includes a side plate 51 and a connecting plate 52 extending vertically along the edge of the connecting plate 52. The side plate 51, the connecting plate 52 and the corresponding mounting plane enclose a meshing space 53 for the transmission gear 42 to rotate. The gap 14 is arranged at the bottom of the meshing space 53, and a clearance hole 54 is opened on the side plate 51 to cooperate with the outer diameter gap 14 of the connecting section 43.

[0052] In this embodiment, the mounting plane corresponding to the side of the connecting plate 52 is the inner side wall of the support seat 10, and the mounting plane corresponding to the bottom of the connecting plate 52 and the bottom of the side plate 51 is the inner bottom surface of the support seat 10. The meshing space 53 is in a bottom open state, and a first opening groove 15 is formed on the inner bottom surface of the support seat 10, and a second opening groove 25 opposite to the first opening groove 15 is formed on the top of the gear box 20. The side plate 51 is fixed integrally with the connecting plate 52, and the upper side and the bottom side of the connecting plate 52 are integrally formed with a locking seat 55 for locking and fixing. The outer wall of the support seat 10 is provided with a locking hole (not marked in the figure) corresponding to the locking seat 55. The locking seat 55 and the locking hole are locked accordingly by bolts. At this time, the meshing space 53 is just above the positions of the first opening groove 15 and the second opening groove 25. The first opening groove 15 and the second opening groove 25 form the gap 14 referred to above. The upper end of the cutter reduction gear 21 protrudes from the gap 14 along the installation space 24 inside the gear box 20, so as to mesh with the transmission gear 42 of the synchronous belt rotating wheel 40 in the meshing space 53.

[0053] Preferably, the thickness of the clearance hole 54 is adapted to the axial extension length of the connecting section 43, that is, the thickness of the clearance hole 54 is equal to the axial extension length of the connecting section 43. Furthermore, in order to better achieve stable installation between the gear separation sleeve 50 and the synchronous belt rotating wheel 40, the outer diameter of the connecting section 43 is equal to the maximum outer diameter of the driving gear 41 and the outer diameter of the transmission gear 42 is larger than the driving gear 41. Thus, the installation and fixation of the synchronous belt rotating wheel 40 can be achieved by the clearance hole 54, and one end of the driving gear 41 is inserted into the clearance hole 54 along the meshing space 53, and then the connecting section 43 is completely embedded in the clearance hole 54, and the side wall of the transmission gear 42 is movably abutted against the inner wall of the meshing space 53, thereby achieving convenient installation of the synchronous belt rotating wheel 40.

[0054] Preferably, Figure 7 , 8As shown, the gear box 20 is also rotatably connected with a motor main gear 26 and an intermediate gear 27. The intermediate gear 27 includes an outer tooth 271 with a larger outer diameter and an inner tooth 272 integrally and coaxially arranged on one side of the outer tooth 271. One side of the outer tooth 271 is meshed with the motor main gear 26, and the cutter reduction gear 21 is meshed with the inner tooth 272 so that the other side of the outer tooth 271 forms an offset overlap with the cutter reduction gear 21. In this embodiment, the motor main gear 26 and the cutter reduction gear 21 are respectively located on both sides of the gear box 20, and the intermediate gear 27 is arranged between the motor main gear 26 and the cutter reduction gear 2 1, a second mounting hole (not shown in the figure) is provided on the inner wall of the gear box 20 for the output end of the drive motor 30 to penetrate, and the axis of the motor main gear 26 is fixedly connected to the output end of the drive motor 30, so that the power transmission between the motor main gear 26 and the cutter reduction gear 21 can be achieved through the intermediate gear 27 formed by the outer teeth 271 and the inner teeth 272. At the same time, the space layout is further optimized through the staggered overlap of the inner and outer teeth 271, and the lateral size of the gear box 20 is effectively reduced. At the same time, the power transmission path is kept stable, thereby enhancing the stability and efficiency of its transmission.

[0055] In addition, in order to coordinate the offset overlapping relationship between the cutter reduction gear 21 and the intermediate gear 27 , the cover plate 23 of the gear box 20 and the bottom shell 22 form corresponding offset surfaces.

[0056] Preferably, Figure 4 , 7 As shown, a motor baffle 28 is provided on the inner wall of the gear box 20 and at the position of the second mounting hole. One side of the motor baffle 28 forms an opening structure with an arc groove 281. The arc groove 281 is adapted to the shape of the output end of the drive motor 30. Therefore, by arranging the motor baffle 28 at the position of the second mounting hole opened on the inner wall of the gear box 20 and forming an arc groove 281 adapted to the shape of the output end of the drive motor 30, not only the installation and positioning of the motor are facilitated, but also the sealing performance of the structure is enhanced to prevent external impurities from entering.

[0057] Preferably, Figure 1 , 3 As shown, an axis detection switch 60 is also provided on one side of the top of the gear box 20, and another axis frame switch is symmetrically provided on the other side of the support base 10 for sensing the movement position of the circular cutter 13. In this embodiment, a snap rib (not marked in the figure) is provided on the cover plate 23 for the axis detection switch 60 to be snapped into.

[0058] Preferably, a cutter baffle 70 cooperating with the shaft detection switch 60 is provided on the top of the gear box 20, and the cutter baffle 70 is arranged on the movement trajectory of the circular cutter 13. In this embodiment, the locking seats 55 on both sides of the gear separation sleeve 50 also serve as fixed seats for the cutter baffle 70. The cutter baffle 70 cooperates with the shaft detection switch 60 to realize accurate sensing of the movement position of the circular cutter 13.

[0059] In this embodiment, the conveyor belt 11 is a synchronous belt, and the synchronous belt rotating wheel 40 is engaged with the synchronous belt to realize transmission.

[0060] The beneficial effects of the utility model are as follows:

[0061] The utility model sets a gear separation sleeve 50 between the driving gear 41 and the transmission gear 42, so as to effectively separate the driving gear 41 from the transmission gear 42 and the gap, thereby preventing paper scraps from entering the gear box 20 through the gap 14 between the gear box 20 and the support seat 10 of the conveyor belt 11 during the transmission of the conveyor belt 11 by the driving motor 30, significantly reducing the risk of obstruction of gear operation, ensuring the normal operation of the printer, and extending its service life.

[0062] Specifically, the structural design of the utility model has the following advantages:

[0063] First, the gear separation sleeve 50 includes side plates 51 and connecting plates 52, which together with the mounting plane enclose an engagement space 53 for the transmission gear 42 to rotate. At the same time, the clearance hole 54 opened on the side plate 51 matches the outer diameter of the connecting section 43 between the driving gear 41 and the transmission gear 42, which not only ensures the normal operation of the gears, but also effectively blocks the invasion of paper scraps.

[0064] Secondly, the first mounting hole 44 integrally formed through the driving gear 41 , the connecting section 43 and the transmission gear 42 along the axial direction simplifies the assembly process and improves the stability of the structure.

[0065] In addition, by arranging an axis detection switch 60 and a cutter baffle 70 cooperating therewith on the top of the gear box 20, the movement state of the circular cutter 13 can be detected to ensure the accuracy and safety of the cutter action.

[0066] In summary, the utility model not only solves the problem of paper scraps being drawn into the gear box 20 in the traditional cutter structure by optimizing the gear sealing structure between the gear box 20 and the conveyor belt 11 support seat 10, but also improves the operating efficiency and reliability of the overall device.

[0067] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An improved cutter gear sealing structure for preventing paper scraps from being drawn in, characterized in that: include: a gear box (20) in which a cutter reduction gear (21) is rotatably disposed, wherein at least a portion of the cutter reduction gear (21) protrudes from a gap (14) formed between the gear box (20) and a support base (10) of a conveyor belt (11); A synchronous belt rotating wheel (40) comprises a driving gear (41) and a transmission gear (42) arranged coaxially with the driving gear (41), wherein the transmission gear (42) meshes with the cutter reduction gear (21), and the driving gear (41) is used to drive the conveyor belt (11); The gear separation sleeve (50) is disposed between the driving gear (41) and the transmission gear (42) and is used to separate the driving gear (41) from the transmission gear (42) and the gap.

2. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 1, characterized in that: A connecting section (43) is integrally provided between the driving gear (41) and the transmission gear (42), and a first mounting hole (44) is integrally provided through the driving gear (41), the connecting section (43) and the transmission gear (42) along the axial direction.

3. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 2, characterized in that: The gear separation sleeve (50) comprises a side plate (51) and a connecting plate (52) extending vertically along the edge of the connecting plate (52); the side plate (51), the connecting plate (52) and the corresponding mounting plane enclose a meshing space (53) for the transmission gear (42) to rotate; the gap (14) is arranged at the bottom of the meshing space (53); and a clearance hole (54) is provided on the side plate (51) to match the outer diameter gap (14) of the connecting section (43).

4. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 3, characterized in that: The thickness of the clearance hole (54) is adapted to the extension length of the connecting section (43) along its axial direction.

5. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 4, characterized in that: The outer diameter of the connecting section (43) is equal to the maximum outer diameter of the driving gear (41), and the outer diameter of the transmission gear (42) is greater than that of the driving gear (41).

6. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 1, characterized in that: The gear box (20) is also rotatably connected to a motor main gear (26) and an intermediate gear (27); the intermediate gear (27) comprises an outer tooth (271) having a larger outer diameter and an inner tooth (272) integrally and coaxially arranged on one side of the outer tooth (271); one side of the outer tooth (271) meshes with the motor main gear (26); the cutter reduction gear (21) meshes with the inner tooth (272) so that the other side of the outer tooth (271) and the cutter reduction gear (21) form an offset overlap.

7. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 6, characterized in that: The inner wall of the gear box (20) is provided with a second mounting hole for the output end of the drive motor (30) to pass through, and the axis of the motor main gear (26) is fixedly connected to the output end of the drive motor (30).

8. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 7, characterized in that: A motor baffle (28) is provided on the inner wall of the gear box (20) at the position of the second mounting hole, and an opening structure with an arc-shaped groove (281) is formed on one side of the motor baffle (28), and the arc-shaped groove (281) is adapted to the shape of the output end of the drive motor (30).

9. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 1, characterized in that: A shaft detection switch (60) is also provided on one side of the top of the gear box (20).

10. The improved cutter gear sealing structure for preventing paper scraps from being drawn in according to claim 9, characterized in that: A cutter baffle (70) cooperating with the shaft detection switch (60) is provided on the top of the gear box (20), and the cutter baffle (70) is arranged on the movement track of the circular cutter (13).

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