Paper feeding wheel structure of printer

Abstract

The invention belongs to the technical field of printing equipment, and particularly relates to a printer paper feeding wheel structure which comprises an inner ring layer, an outer ring layer and a connecting component. An annular groove is coaxially formed in the outer side wall of the outer ring layer and penetrates through the outer ring layer; the two ends of the connecting component are integrally connected with the inner ring layer and the outer ring layer respectively, and the connecting component is in a long strip shape and is arranged in the axial direction of the inner ring layer; the cross section of the connecting component is Z-shaped, and two transverse ends of the connecting component are respectively connected with the inner ring layer and the outer ring layer; a unique hub hollow-out design is adopted in the hub, the use amount of rubber materials is effectively reduced through reasonable structural layout, and the inner layer structure and the outer layer structure are ingeniously and tightly connected together through the connecting component in a special shape arranged at the hollow-out part, so that a stable and efficient overall structure is formed, and the service life of the hub is prolonged. The use efficiency of materials is optimized, the production cost is reduced, the overall weight of the paper feeding wheel is reduced to a certain degree, and the operation efficiency and the response speed of equipment can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of printing equipment, and in particular to a paper feeding wheel structure of a printer. Background Art

[0002] In the OA industry of office equipment such as printers and copiers, the pickup roller plays a key role in the paper feeding system. Its main function is to accurately separate the paper from the paper box and smoothly transfer it to the inside of the equipment to ensure the orderly progress of the imaging process. The traditional pickup roller is usually composed of two parts: a roller core and a rubber sleeve. The roller core is mostly made of plastic material, which plays the role of supporting the rubber sleeve and connecting the machine drive rod, so that the pickup roller can operate normally. The rubber sleeve is mainly made of rubber material. With the friction damping characteristics of the rubber itself, as well as the texture and grooves designed on its surface, it improves the stability of paper feeding and the ability to hide paper scraps to a certain extent. At present, the shape of the pickup rollers on the market is mostly circular or semi-circular solid structure. This traditional design has gradually exposed many disadvantages during long-term use.

[0003] For example, during the operation of the equipment, abnormal noise is often generated due to the westward movement of the inner and outer layers of the structure, which not only affects the comfort of the office environment, but also may indicate a potential risk of failure inside the equipment; at the same time, failures such as empty paper, paper jams, or multiple paper feeds also occur from time to time. These problems seriously interfere with the normal working process of the equipment, greatly reduce office efficiency, and have a negative chain reaction on the quality and efficiency of imaging. In addition, from the perspective of production and manufacturing, the original double-layer structure mold design is complex, resulting in high mold costs (two sets of molds are required), which undoubtedly increases production costs and is not conducive to large-scale industrial production and promotion and application. Summary of the invention

[0004] The object of the present invention is to provide a paper feeding wheel structure for a printer to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a printer paper feeding wheel structure, comprising an inner ring layer and an outer ring layer coaxially located outside the inner ring layer, and a connecting member located between the inner ring layer and the outer ring layer; an annular groove is coaxially provided on the outer wall of the outer ring layer, and the annular groove passes through the outer ring layer; the two ends of the connecting member are respectively connected to the inner ring layer and the outer ring layer as a whole, the connecting member is in the shape of an elongated strip and is arranged along the axial direction of the inner ring layer; the cross-section of the connecting member is Z-shaped and its two lateral ends are respectively connected to the inner ring layer and the outer ring layer.

[0006] For the paper feeding wheel structure of the printer according to the present invention, a plurality of connecting members are provided and circumferentially and uniformly arranged between the inner layer and the outer layer. An adjacent pair of the connecting members and the annular groove form a chip discharging unit, and a plurality of the chip discharging units are provided and correspond to the plurality of connecting members.

[0007] For the paper feeding wheel structure of the printer according to the present invention, the included angle between the side wall of the connecting member facing the direction of its rotation and advancement and the inner side wall of the outer ring is an obtuse angle.

[0008] For the paper feeding wheel structure of the printer according to the present invention, the included angle between the side wall of the connecting member facing away from the direction of its rotation and advancement and the inner side wall of the outer ring is an acute angle.

[0009] For the paper feeding wheel structure of the printer according to the present invention, the thickness of the inner layer is less than the thickness of the outer layer.

[0010] For the paper feeding wheel structure of the printer according to the present invention, the thickness of the connecting member is greater than or equal to the thickness of the inner layer.

[0011] For the paper feeding wheel structure of the printer according to the present invention, a deformation detection cavity is formed between the two end connection parts of the connecting member and the outer side wall of the inner layer, and a detection unit for detecting the deformation of the connecting member caused by rotational torque is provided in the deformation detection cavity.

[0012] For the paper feeding wheel structure of the printer according to the present invention, the detection unit includes a magnet sheet and a Hall sensor; the magnet sheet is provided on the connecting member, and the Hall sensor is provided on the outer side wall of the inner layer.

[0013] For the paper feeding wheel structure of the printer according to the present invention, the detection unit is detachably arranged in the deformation detection cavity.

[0014] For the paper feeding wheel structure of the printer according to the present invention, a plurality of the annular grooves are provided and uniformly arranged along the axial direction of the outer layer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The one-piece forming process cures the quality defects and high cost problems of the split structure. The connecting member and the annular groove form a vibration-chip discharging coupling design to synchronously overcome the problems of noise and paper jamming, and an internal hollow design is formed. Through a reasonable structural layout, the usage amount of rubber material is effectively reduced, which not only optimizes the material usage efficiency, reduces the production cost, but also reduces the overall weight of the paper feeding wheel to a certain extent, helping to improve the operation efficiency and response speed of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is the axial front view of the present invention.

[0019] Figure 2 This is the radial cross-sectional view of the present invention. Specific embodiments

[0020] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0021] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase does not necessarily refer to the same embodiment at each occurrence in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0022] "Plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0023] Moreover, the terms indicating directions such as "up", "down", "left", "right", "upper end", "lower end", "longitudinal", etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] This embodiment discloses a paper feeding wheel structure of a printer as shown in Figure 1 and 2 , which includes an inner layer 10, an outer layer 20 coaxially located outside the inner layer 10, and a connecting member 30 located between the inner layer 10 and the outer layer 20; an annular groove 21 is coaxially provided on the outer side wall of the outer layer 20, and the annular groove 21 penetrates through the outer layer 20; both ends of the connecting member 30 are integrally connected to the inner layer 10 and the outer layer 20 respectively, the connecting member 30 is strip-shaped and arranged along the axial direction of the inner layer 10; the cross-section of the connecting member 30 is Z-shaped and its two transverse ends 31 are respectively connected to the inner layer 10 and the outer layer 20; the one-piece forming process cures the quality defects and high cost problems of the split structure, and the connecting member 30 with an asymmetric Z-shaped structure and the annular groove 21 form a vibration-chip removal coupling design, which can overcome the problems of noise and paper jamming, realize the dual functions of vibration cancellation and dynamic chip removal, and form an internal hollow design. Through reasonable structural layout, the usage amount of rubber material is effectively reduced, which not only optimizes the material usage efficiency, reduces the production cost, but also reduces the overall weight of the paper feeding wheel to a certain extent, helping to improve the operation efficiency and response speed of the equipment.

[0026] In addition, 3% carbon nanotubes (CNT) can be added to the inner layer 10 and the connecting member 30 to improve the thermal conductivity, thereby delaying the wear progress caused by the frictional heat generation of the outer layer 20, which can greatly reduce the paper jamming rate, and adding carbon nanotubes can also shorten the vulcanization time of the overall structure by nearly one-third.

[0027] In this embodiment, a plurality of connecting members 30 are provided and are circumferentially and evenly arranged between the inner layer 10 and the outer layer 20. The specific angular spacing between adjacent Z-shaped connecting members 30 is 20°, so that reverse vibration waves are generated at the critical speed (1500 rpm). Through ANSYS simulation verification, the vibration energy in the range of 600 - 2000 Hz can be greatly attenuated, and the reduction of the running noise can basically reach 20%; further, an adjacent two connecting members 30 and the annular groove 21 form a chip removal unit, and a plurality of chip removal units are provided corresponding to a plurality of connecting members 30, so as to ensure good chip removal ability at each rotation angle of the paper feeding wheel while realizing the dual functions of vibration cancellation and dynamic chip removal.

[0028] In this embodiment, the included angle between the side wall of the connecting member 30 facing the direction of its rotational advancement and the inner side wall of the outer layer is an obtuse angle. Further, the included angle between the side wall of the connecting member 30 facing away from the direction of its rotational advancement and the inner side wall of the outer layer is an acute angle. As a result, one end of the connecting member 30 connected to the outer layer 20 forms a certain inclination angle towards the direction of its rotational advancement, and a reverse support force providing structure is formed, which can provide sufficient reverse support force for the outer layer 20, effectively preventing the rebound phenomenon that occurs after the resistance force on the outer layer 20 is suddenly withdrawn, which may cause the paper to be kicked forward.

[0029] In this embodiment, the thickness of the inner layer 10 is less than the thickness of the outer layer 20, so as to balance the material cost of the inner layer 10 and the wear of the outer layer.

[0030] In this embodiment, the thickness of the connecting member 30 is greater than or equal to the thickness of the inner layer 10, so as to provide sufficient radial and circumferential support for the outer layer 20.

[0031] In this embodiment, there is a deformation detection cavity 40 between the two end connection parts 32 of the connecting member 30 and the outer side wall of the inner layer 10. A detection unit 50 for detecting the deformation of the connecting member 30 caused by rotational torque is provided in the deformation detection cavity 40; specifically, the detection unit 50 includes a magnet sheet 51 and a Hall sensor 52; the magnet sheet 51 is provided on the connecting member 30, and the Hall sensor 52 is provided on the outer side wall of the inner layer 10. During actual operation, when the outer layer 20 rubs the paper, it receives a reverse resistance and generates a reverse torque, which causes the connecting member 30 to deform backward, so that the two end connection parts 32 of the connecting member 30 parallel to the inner layer 10 collapse towards the center of the inner layer 10. At this time, the reverse torque of the outer layer 20 can be detected indirectly with high precision through the Hall sensor 52, which is convenient for the control system to make corresponding deceleration control of the paper feed wheel drive motor in a timely manner.

[0032] In this embodiment, the detection unit 50 is detachably arranged in the deformation detection cavity 40, so as to facilitate the separate processing and manufacturing in the early stage.

[0033] In this embodiment, there are multiple annular grooves 21 and they are evenly arranged along the axial direction of the outer layer 20, so as to ensure that good chip removal ability can be maintained at each position in the axial direction of the outer layer 20.

[0034] The following table details the comparison of the progress of the structure of this solution with the traditional structure:

[0035] Index Traditional structure Structure of this solution Production beat 120 seconds per piece 85 seconds per piece Dynamic balance level G6.3 G2.5 Number of times for ten thousand pages of cardboard 8 times 0 times Continuous operation for temperature rise ΔT = 38°C ΔT = 15°C Mean time between failures 8000h 25000h

[0036] It should be understood that for those of ordinary skill in the art, modifications or variations can be made according to the above description, and all such improvements and variations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A printer paper feeding wheel structure, characterized in that: It includes an inner ring layer and an outer ring layer coaxially located outside the inner ring layer, and a connecting member located between the inner ring layer and the outer ring layer; an annular groove is coaxially provided on the outer wall of the outer ring layer, and the annular groove penetrates the outer ring layer; the two ends of the connecting member are respectively connected to the inner ring layer and the outer ring layer as a whole, the connecting member is in the shape of an elongated strip and is arranged along the axial direction of the inner ring layer; the cross-section of the connecting member is in a Z shape and its two lateral ends are respectively connected to the inner ring layer and the outer ring layer.

2. The printer paper feeding wheel structure according to claim 1, characterized in that: There are multiple connecting members and they are evenly arranged circumferentially between the inner ring layer and the outer ring layer. Two adjacent connecting members and the annular groove form a chip removal unit. There are multiple chip removal units and multiple corresponding connecting members are provided.

3. The printer paper feeding wheel structure according to claim 1, characterized in that: The included angle between the side wall of the connecting member in the direction of rotation and the inner side wall of the outer ring is an obtuse angle.

4. The printer paper feeding wheel structure according to claim 3, characterized in that: The angle between the side wall of the connecting member that is away from the rotational advancement direction and the inner side wall of the outer ring is an acute angle.

5. The printer paper feeding wheel structure according to claim 1, characterized in that: The thickness of the inner ring layer is smaller than the thickness of the outer ring layer.

6. The printer paper feeding wheel structure according to claim 5, characterized in that: The thickness of the connecting member is greater than or equal to the thickness of the inner ring layer.

7. The printer paper feeding wheel structure according to claim 6, characterized in that: A deformation detection cavity is provided between the connecting parts at both ends of the connection member and the outer side wall of the inner ring layer, and a detection unit for detecting the deformation of the connection member caused by the rotational torque is provided in the deformation detection cavity.

8. The printer paper feeding wheel structure according to claim 7, characterized in that: The detection unit includes a magnet sheet and a Hall sensor; the magnet sheet is arranged on the connecting member, and the Hall sensor is arranged on the outer side wall of the inner ring layer.

9. The printer paper feeding wheel structure according to claim 7 or 8, characterized in that: The detection unit is detachably arranged in the deformation detection cavity.

10. The printer paper feeding wheel structure according to claim 1, characterized in that: The annular grooves are provided in plurality and are evenly arranged along the axial direction of the outer ring layer.

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