Sheet separating structure
By combining the paper-splitting wheel, torque limiter, and ratchet in the paper-splitting structure, the problems of complex active sheet-splitting wheel structure and torque adjustment are solved, achieving structural simplification and flexible torque adjustment, avoiding paper damage and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI FUKANG ELECTRONICS CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-07-07
AI Technical Summary
Existing active sheet-separating rollers have complex structures, high costs, and are difficult to adjust the active and passive sheet-separating torques separately, which can easily damage thin paper.
It adopts a paper-splitting structure, which includes a drive motor, paper-splitting wheel, paper-splitting torque limiter, ratchet, and active torque limiter. The combination of ratchet and torque limiter restricts the direction of rotation and independently adjusts the active and passive paper-splitting torque.
It achieves a simplified structure, making it easy to adjust the active and passive sheet separation torque separately, avoiding paper damage, and reducing production costs and operational complexity.
Smart Images
Figure CN224467089U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a paper separation structure for a scanner, and more particularly to an active paper separation structure located at the paper inlet of the scanning device to prevent paper from being repeatedly fed into the paper path. Background Technology
[0002] In modern scanners and printers, the active sheet separator is a crucial component ensuring stable operation. Its primary function is to precisely separate papers, preventing multiple sheets from entering the feed path simultaneously and thus avoiding paper jams or printing errors. Through the coordinated action of the drive motor, the separator plate, and the pressure regulation system, the active sheet separator can efficiently handle various paper materials and thicknesses, demonstrating exceptional efficiency, especially in business document processing.
[0003] However, existing active sheet-separating rollers have a relatively complex structure, including multiple components such as a drive motor, sensors, and pressure regulation systems. This not only increases production and assembly costs but also raises the difficulty of maintenance and operation. Furthermore, some active sheet-separating rollers, in addition to active sheet separation, also have the function of passive sheet separation while remaining stationary. In this case, different sheet-separating torques need to be set for active and passive sheet separation to prevent thinner paper from being bent and damaged during active separation. However, typical sheet-separating roller structures often cannot perform such fine adjustments, or even if adjustments are possible, they require additional complex adjustment mechanisms, such as precision pressure control systems or multi-stage torque adjustment devices. This further increases production costs and structural complexity.
[0004] Based on the above-mentioned shortcomings, it is necessary to provide a paper separating structure that is simple in structure and easy to adjust the active separating torque and the passive separating torque separately. Utility Model Content
[0005] The purpose of this invention is to provide a paper separating structure that is simple in structure and easy to adjust the active separating torque and the passive separating torque separately.
[0006] To achieve the above objectives, the present invention discloses a paper-splitting structure disposed between a paper feed channel and a paper tray, comprising: a drive motor; a wheel axle disposed between the paper feed channel and the paper tray; a paper-splitting wheel coaxially sleeved on the wheel axle; at least one paper-splitting torque limiter sleeved on the wheel axle and connected to the paper-splitting wheel; a ratchet sleeved on the wheel axle and connected to the paper-splitting torque limiter to limit the rotation of the paper-splitting torque limiter; and an active torque limiter sleeved on the wheel axle and connected between the ratchet and the drive motor.
[0007] Furthermore, the torque threshold of the paper-splitting torque limiter is greater than the torque threshold of the active torque limiter.
[0008] Furthermore, the ratchet includes a ratchet gear mounted on the axle, a pawl bracket coaxially mounted on the axle, and a pawl pivotally connected to the pawl bracket and engaging with the ratchet gear.
[0009] Furthermore, the ratchet is provided with transmission teeth and transmission grooves at both ends to engage with the active torque limiter and the paper-splitting torque limiter, respectively.
[0010] Furthermore, the paper separating wheel includes a hub mounted on the axle and two rubber wheels respectively mounted on both ends of the hub.
[0011] Furthermore, the hub is provided with a hollow connecting shaft and two sleeves respectively disposed at both ends of the connecting shaft. The connecting shaft is sleeved on the axle, the rubber wheel is disposed outside the sleeve, and the paper separating torque limiter is installed inside the sleeve.
[0012] Furthermore, the paper-splitting structure is further provided with a transmission gear set, which is connected between the active torque limiter and the drive motor.
[0013] In summary, this invention provides a paper-separating structure comprising a coaxially arranged paper-separating wheel, at least one paper-separating torque limiter, a ratchet, and an active torque limiter. This ensures a streamlined structure and facilitates separate adjustment of the active and passive paper-separating torques. Attached Figure Description
[0014] Figure 1 This is a cross-sectional schematic diagram of a scanning device equipped with the paper-splitting structure of this invention;
[0015] Figure 2 This is a three-dimensional diagram of the paper-cut structure of this work;
[0016] Figure 3 This is an exploded view of the paper-cut structure of this work;
[0017] Figure 4 This is a schematic diagram of the passive paper-splitting structure of this creation;
[0018] Figure 5 This is another schematic diagram of the passive paper-splitting structure of this creation;
[0019] Figure 6 This is a schematic diagram of the paper-splitting structure used in this creation for active paper splitting;
[0020] Figure 7 This is another schematic diagram of the paper-splitting structure of this creation, demonstrating active paper splitting. Detailed Implementation
[0021] To illustrate the technical content, structural features, objectives, and technical effects of the present invention in detail, the following description is provided in conjunction with specific embodiments and accompanying drawings.
[0022] Please see Figure 1 The figure shows a scanning device equipped with a paper separation structure 100, comprising a housing 10, a paper feed channel 11 disposed inside the housing 10, the paper feed channel 11 having a paper inlet 12 and a paper outlet 13, at least one scanning optical engine 16 disposed in the path of the paper feed channel 11, a paper tray 14 disposed upstream of the paper inlet 12, a paper tray 15 disposed downstream of the paper outlet 13, a drive motor 17 fixed inside the housing 10, a plurality of paper feed rollers 18 disposed in the path of the paper feed channel 11, the paper feed rollers 18 being connected to the drive motor 17 to feed the paper to be scanned through the paper feed channel 11, at least one paper pick-up roller 20 disposed between the paper inlet 12 and the paper tray 14, and a paper separation structure 100 disposed between the paper inlet 12 and the paper feed channel 11. The paper separation structure 100 blocks paper that is repeatedly fed into the paper feed channel 11. To facilitate the explanation of the rotation direction of each roller and shaft, the exact rotation direction of each component is not directly described in the following instructions, but is instead indicated by "forward" and "reverse". "Forward" is defined as the direction in which the paper feed roller 20 and the paper feed roller 18 feed paper from the paper inlet 12 to the paper outlet 13 when a component rotates. "Reverse" is defined as the direction in which the paper feed roller 20 and the paper feed roller 18 feed paper from the paper outlet 13 to the paper inlet 12 when a component rotates.
[0023] Please see again Figure 2 and Figure 3 In this preferred embodiment, the paper separating structure 100 includes: a wheel shaft 30 disposed at the paper inlet 12; a paper separating wheel 31 coaxially sleeved on the wheel shaft 30 and in contact with the paper take-up wheel 20 to separate repeatedly fed sheets of paper; two paper separating torque limiters 40 connected between the wheel shaft 30 and the paper separating wheel 31 to limit the maximum torque of the separating wheel 31; a ratchet 70 sleeved on the wheel shaft 30 and connected to one of the paper separating torque limiters 40 to limit the rotation direction of the paper separating torque limiter 40; and an active torque limiter 60 sleeved on the wheel shaft 30 and connected between the ratchet 70 and the drive motor 17 to limit the torque transmitted from the drive motor 17 to the paper separating torque limiter 40.
[0024] And such as Figure 3 As shown, one end of the active torque limiter 60 is connected to the drive motor 17 via a set of transmission gears. The ratchet 70 includes a ratchet 71 mounted on the axle 30, a pawl bracket 72 coaxially mounted on the axle 30, and a pawl 73 pivotally connected to the pawl bracket 72. The ratchet 71 has transmission teeth 71a and transmission grooves 71b at both ends to mesh with the active torque limiter 60 and the paper-splitting torque limiter 40, respectively. The pawl bracket 72 is sleeved on the axle 30 and covers the paper-splitting wheel 31, while the pawl 73 meshes with the ratchet 71 to restrict the ratchet 71 from rotating in the opposite direction. The paper-splitting wheel 31 includes a hub 32 mounted on the paper-splitting torque limiter 40 and two rubber wheels 33 respectively mounted on both ends of the hub 32. In this preferred embodiment, the hub 32 is provided with a hollow connecting shaft 32a and two sleeves 32b respectively disposed at both ends of the connecting shaft 32a. The connecting shaft 32a is sleeved on the axle 30, the rubber wheel 33 is disposed outside the sleeves 32b, and the paper-separating torque limiter 40 is respectively installed inside the two sleeves 32b. Through the independently disposed paper-separating torque limiter 40 and the active torque limiter 60, the paper-separating structure of this invention can independently adjust the sheet-separating resistance during active and passive sheet separation.
[0025] Please see again Figures 4 to 7 In this preferred embodiment, the torque threshold of the paper-taking roller 20 is set to be greater than the torque threshold of the paper-splitting torque limiter 40, the torque threshold of the paper-splitting torque limiter 40 is set to be greater than the torque threshold of the active torque limiter 60, and both the torque thresholds of the paper-splitting torque limiter 40 and the active torque limiter 60 are greater than the frictional force between the overlapping papers. Therefore, the specific process for separating the sheets is as follows:
[0026] Please see Figure 1 , Figure 3 and Figure 4 ,exist Figure 4 The scanner created by Nakamoto is set to passive sheet separation mode, and only a single sheet is fed to the sheet separation structure 100. In passive sheet separation mode, the drive motor 17 remains stationary, so the axle 30 is restricted by the ratchet 70 and cannot rotate in the forward direction. At this time, the single sheet is fed to the sheet separation wheel 31 by the paper take-up wheel 20. Since the torque threshold of the paper take-up wheel 20 is set to be greater than the torque threshold of the sheet separation torque limiter 40, the sheet separation torque limiter slips when the single sheet is fed past the sheet separation wheel 31, ultimately allowing the single sheet to be successfully fed into the paper feeding channel 11.
[0027] Please see Figure 1, Figure 3 and Figure 5 ,exist Figure 5 The scanner created by Nakamoto is set to passive sheet separation mode, but multiple sheets of paper are fed overlappingly to the sheet separation structure 100. In passive sheet separation mode, the drive motor 17 remains stationary, so the axle 30 is restricted by the ratchet 70 and cannot rotate in the forward direction. At this time, the overlapping sheets are fed to the sheet separation wheel 31 by the paper take-up wheel 20. Since the torque threshold of the sheet separation torque limiter 40 is greater than the friction between the overlapping sheets, slippage occurs between the sheets as they are fed past the sheet separation wheel 31. Ultimately, except for the sheets that are in contact with the paper take-up wheel 20 and are fed into the paper feed channel 11, the remaining sheets are blocked by the sheet separation wheel 31.
[0028] Please see Figure 1 , Figure 3 and Figure 6 ,exist Figure 6 The scanner created by Nakamoto is set to active sheet separation mode, with only a single sheet being fed to the sheet separation structure 100. In active sheet separation mode, the drive motor 17 rotates in the reverse direction, causing the axle 30 to rotate in the same direction. At this time, the single sheet is fed to the sheet separation roller 31 by the paper take-up roller 20. Since the torque threshold of the paper take-up roller 20 is set to be greater than the torque threshold of the sheet separation torque limiter 40 and the active torque limiter 60, the active torque limiter 60 slips when the single sheet is fed past the sheet separation roller 31, ultimately allowing the single sheet to be successfully fed into the paper feeding channel 11.
[0029] Please see Figure 1 , Figure 3 and Figure 7 ,exist Figure 7 The scanner created by Nakamoto is set to active sheet separation mode, but multiple sheets of paper are fed overlappingly to the sheet separation structure 100. In active sheet separation mode, the drive motor 17 rotates in the reverse direction, causing the axle 30 to rotate in the same direction. At this time, the overlapping sheets are fed to the sheet separation roller 31 by the paper take-up roller 20. Since the torque threshold of the sheet separation torque limiter 40 and the active torque limiter 60 is greater than the friction between the overlapping sheets, slippage occurs between the sheets as they are fed past the sheet separation roller 31. Ultimately, except for the sheets that are in contact with the paper take-up roller 20 and are fed into the paper feed channel 11, the remaining sheets are fed back to the paper tray 14 in the reverse direction by the sheet separation roller 31.
[0030] In summary, the paper-splitting structure of this invention is disposed between a paper feed channel and a paper tray and includes: a drive motor; a wheel axle disposed between the paper feed channel and the paper tray; a paper-splitting wheel coaxially mounted on the wheel axle; a paper-splitting torque limiter connected between the wheel axle and the paper-splitting wheel; a transmission shaft connected to the drive motor to transmit power; a ratchet connected to the wheel axle to limit the rotation of the wheel axle; and an active torque limiter connected to the drive motor.
[0031] Between the drive shaft and the ratchet. This achieves a simplified structure and facilitates easy adjustment of the active tensioning mechanism.
[0032] The purpose of torque and passive tensioning torque.
Claims
1. A paper-splitting structure, characterized in that: The device is disposed between a paper feed channel and a paper tray and includes: a drive motor; a wheel axle disposed between the paper feed channel and the paper tray; a paper separating wheel coaxially mounted on the wheel axle; at least one paper separating torque limiter mounted on the wheel axle and connected to the paper separating wheel; a ratchet mounted on the wheel axle and connected to the paper separating torque limiter to limit the rotation of the paper separating torque limiter; and an active torque limiter mounted on the wheel axle and connected between the ratchet and the drive motor.
2. The paper-splitting structure as described in claim 1, characterized in that: The torque threshold of the paper-separating torque limiter is greater than the torque threshold of the active torque limiter.
3. The paper-splitting structure as described in claim 1, characterized in that: The ratchet includes a ratchet gear mounted on the axle, a pawl bracket coaxially mounted on the axle, and a pawl pivotally connected to the pawl bracket and meshing with the ratchet gear.
4. The paper-splitting structure as described in claim 3, characterized in that: The ratchet is provided with transmission teeth and transmission grooves at both ends to mesh with the active torque limiter and the paper separating torque limiter, respectively.
5. The paper-splitting structure as described in claim 1, characterized in that: The paper separating roller includes a hub mounted on the axle and two rubber wheels respectively mounted on both ends of the hub.
6. The paper-splitting structure as described in claim 5, characterized in that: The hub has a hollow connecting shaft and two sleeves respectively disposed at both ends of the connecting shaft. The connecting shaft is sleeved on the axle, the rubber wheel is disposed outside the sleeve, and the paper separating torque limiter is installed inside the sleeve.
7. The paper-splitting structure as described in claim 1, characterized in that: A transmission gear set is further provided, which is connected between the active torque limiter and the drive motor.