Paper feed rollers, paper feed mechanism and office equipment

Abstract

This application relates to the field of office equipment technology, and more particularly to a paper feeding roller, a paper feeding mechanism, and office equipment. The paper feeding roller disclosed in this application is applied to a paper feeding mechanism and includes an outer ring portion and a shaft portion. The outer ring portion is sleeved on the shaft portion and protrudes from the outer peripheral surface of the shaft portion. At least a portion of the outer ring portion is configured to abut against the paper, wherein the length of the portion of the outer ring portion abutting against the paper along the axial direction of the shaft portion is 5 mm to 30 mm. By reducing the abutment length between the outer ring portion and the paper along the axial direction of the shaft portion, the pressure applied to the paper by the paper feeding roller in the paper feeding mechanism is more concentrated. When papers of different sizes enter the paper feeding mechanism, the paper feeding roller can ensure that the pressure is concentrated on the paper, especially in the middle of the paper along its width direction, thereby effectively avoiding the problem of paper skewing caused by the offset of the pressure application point.

Description

Technical Field

[0001] This application relates to the field of office equipment technology, and in particular to a paper feeding roller, a paper feeding mechanism, and office equipment. Background Technology

[0002] In modern office settings, scanning paper documents is an extremely common task. Office equipment used for document scanning can quickly, accurately, and clearly convert image information into digital signals, effectively preserving important documents and enabling the sharing, storage, and transmission of data and information. However, office equipment typically only allows one width of paper to be fed at a time. When different paper sizes enter the paper feed mechanism, the limit blocks for the specified width fail to stop the paper, easily leading to paper skew and consequently affecting the scanning results. Utility Model Content

[0003] This application discloses a paper feeding roller, a paper feeding mechanism, and an office device, which can effectively avoid the problem of paper skewing caused by the deviation of the pressure application point.

[0004] To achieve the above objectives, in a first aspect, this application discloses a paper feeding roller, comprising:

[0005] The outer ring portion has a first through hole extending along its axial direction; and

[0006] A shaft portion, which passes through the first through hole, such that the outer ring portion protrudes from the outer peripheral surface of the shaft portion, and the outer ring portion is at least partially configured to abut against the paper;

[0007] The length L of the outer ring portion that contacts the paper along the axial direction of the shaft portion is 5 mm to 30 mm.

[0008] In some possible implementations, in the axial direction of the outer ring portion, the diameter of the outer ring portion at the center position is larger than the diameter of the outer ring portion at the edge position.

[0009] In some possible implementations, the diameter of the outer ring gradually increases from the edge to the center along the axial direction of the outer ring, so that the outer ring is shaped like a spindle when cut by a cross section parallel to the axial direction of the outer ring.

[0010] In some possible implementations, the difference between the maximum diameter and the minimum diameter of the outer ring portion is 0.4 mm to 10 mm; and / or,

[0011] The outer ring portion has an arc-shaped surface, and the radius of curvature R of the arc-shaped surface is 1 / 275 to 1 / 25.

[0012] In some possible implementations, the outer ring portion includes a main body portion and two edge portions, the two edge portions being respectively disposed on both sides of the main body portion along the axial direction of the outer ring portion, the diameter of the edge portions being smaller than the diameter of the main body portion, and the main body portion being used to abut against the paper.

[0013] In some possible implementations, a recess is formed at the center of the outer peripheral surface of the shaft portion along its axial direction. The outer ring portion includes a first portion and a second portion, which are respectively disposed on both sides of the recess along the axial direction of the shaft portion. The recess is configured to accommodate a sensor for detecting the state of the paper.

[0014] Secondly, this application also discloses a paper feeding mechanism, including at least one paper feeding roller as described in the first aspect above.

[0015] In some possible implementations, the paper feeding mechanism includes a paper picking roller, a paper separating roller, a scanning roller, and a paper output roller, wherein the paper picking roller, the paper separating roller, the scanning roller, and the paper output roller are arranged sequentially along the paper conveying direction;

[0016] The paper feeding rollers include multiple rollers, one of which is the paper picking roller, and another of which is the paper separating roller.

[0017] In some possible implementations, the paper feeding mechanism further includes a frame and an abutment portion, the abutment portion being rotatably connected to the frame to abut against or move away from the paper-taking roller, the abutment portion and the paper-taking roller being configured to abut against the paper to remove the paper;

[0018] The length L of the contact portion between the contacting part and the paper along the axial direction of the shaft body is 5 mm to 30 mm;

[0019] And / or,

[0020] The paper separating rollers include two, which are spaced apart along a direction intersecting the conveying direction. The two paper separating rollers are configured to abut against the paper to separate the paper, and both paper separating rollers are the paper feeding rollers.

[0021] Thirdly, this application also discloses an office device, including a housing and a paper feeding mechanism as described in the second aspect above, the paper feeding mechanism being disposed in the housing and configured to feed paper.

[0022] In some possible implementations, the office equipment further includes a frame portion disposed within the housing, a conveying channel forming between the frame portion and the paper feeding mechanism, the conveying channel being configured for paper to pass through, and the outer ring portion being located at the center of the conveying channel along a first direction;

[0023] The first direction intersects the direction in which the paper passes through the conveying channel and also intersects the height direction of the conveying channel.

[0024] Compared with the prior art, the beneficial effects of this application are:

[0025] This application discloses a paper feeding roller, a paper feeding mechanism, and office equipment. The paper feeding roller is applied to the paper feeding mechanism and includes an outer ring portion and a shaft portion. The outer ring portion is sleeved on the shaft portion and protrudes from the outer peripheral surface of the shaft portion. At least a portion of the outer ring portion is configured to abut against the paper. The length of the portion of the outer ring portion that abuts against the paper along the axial direction of the shaft portion is 5 mm to 30 mm. By reducing the abutment length between the outer ring portion and the paper along the axial direction of the shaft portion, the pressure applied to the paper by the paper feeding roller in the paper feeding mechanism is more concentrated. When papers of different sizes enter the paper feeding mechanism, the paper feeding roller can concentrate the pressure on the paper, especially at the middle position of the paper along its width direction, thereby effectively avoiding the problem of paper skewing caused by the offset of the pressure application point, which is beneficial to improving the scanning effect of the office equipment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the office equipment provided in the embodiments of this application;

[0028] Figure 2 A top view of the office equipment provided in the embodiments of this application;

[0029] Figure 3 for Figure 2 Sectional view of AA;

[0030] Figure 4 This is a schematic diagram of the paper feeding mechanism provided in the embodiments of this application;

[0031] Figure 5A for Figure 4 Sectional view of BB;

[0032] Figure 5BA schematic diagram of the paper feeding structure between the contact part and the paper pick-up roller;

[0033] Figure 5C A schematic diagram of a structure in which paper feeds between two separating rollers;

[0034] Figure 5D This is a schematic diagram of another structure for paper to feed between two separating rollers;

[0035] Figure 5E This is a schematic diagram of another structure in which paper feeds between two separating rollers;

[0036] Figure 5F This is a schematic diagram of another structure in which paper feeds between two separating rollers;

[0037] Figure 6 A front view of a structure of a paper feeding roller provided in an embodiment of this application;

[0038] Figure 7 A front view of another structure of the paper feeding roller provided in an embodiment of this application;

[0039] Figure 8 A front view of yet another structure of the paper feeding roller provided in an embodiment of this application;

[0040] Figure 9 A front view of yet another structure of the paper feeding roller provided in an embodiment of this application;

[0041] Figure 10 A front view of yet another structure of the paper feeding roller provided in an embodiment of this application;

[0042] Figure 11 A front view of yet another structure of the paper feeding roller provided in an embodiment of this application;

[0043] Figure 12 A front view of yet another structure of the paper feeding roller provided in an embodiment of this application;

[0044] Figure 13 A front view of yet another structure of the paper feeding roller provided in an embodiment of this application;

[0045] Figure 14 An exploded view of one structure of a paper feeding roller provided in an embodiment of this application;

[0046] Figure 15 An exploded view of another structure of the paper feeding roller provided in an embodiment of this application;

[0047] Figure 16 An exploded view of yet another structure of the paper feeding roller provided in the embodiments of this application;

[0048] Figure 17 An exploded view of yet another structure of the paper feeding roller provided in the embodiments of this application;

[0049] Figure 18 This is an exploded view of another structure of the paper feeding roller provided in the embodiments of this application.

[0050] Explanation of reference numerals in the attached figures:

[0051] 100-Paper feed roller;

[0052] 10-Outer ring; 11-First through hole; 13-Arc-shaped surface; 14-First part; 15-Second part; 16-Main body part; 17-Edge part;

[0053] 20 - Shaft body portion; 21 - Recessed portion; 22 - Receiving portion; 221 - First groove; 222 - Second groove; 23 - Shaft core portion;

[0054] 200-Paper feeding mechanism; 201-Paper picking roller; 202-Paper separating roller; 203-Scanning roller; 204-Paper output roller; 205-Abutting part; 206-Frame;

[0055] 300 - Office equipment; 301 - Housing; 302 - Frame; 303 - Paper inlet; 304 - Paper outlet; 305 - Conveyor channel; A - Paper;

[0056] F1 - Width direction; F2 - Height direction; F3 - Length direction;

[0057] F4 - Axial direction; F5 - Conveying direction. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] In this application, the terms "upper," "lower," "rear," "top," "bottom," "inner," "outer," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0060] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0061] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0062] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0063] In modern office environments, the digitization of paper documents has become an indispensable task, and office equipment (such as scanners and printers) plays a crucial role as the core tools in this process. Taking scanners as an example, they can quickly, accurately, and clearly capture image information on paper and convert it into digital signals. This conversion process not only greatly improves work efficiency but also provides an efficient and secure way to preserve vital documents. Through digitization, important documents can be instantly shared, permanently stored, and rapidly transmitted in virtual space, thus meeting the urgent needs of modern offices for information flow and management.

[0064] However, in the actual application of office equipment, in order to ensure the best scanning effect and the stability of equipment operation, the limiting block located at the paper feed can slide from the edge to the middle until it contacts the edge of the paper, thereby limiting the paper when it moves forward and preventing the paper from skewing. However, since the limiting blocks are respectively against both sides of the paper along its width, such a design can usually only put in one size of document at a time.

[0065] When a user inserts multiple sheets of paper of different sizes at once, the limiting block cannot simultaneously restrain the different sizes of paper, causing the paper to become skewed during transport. If the skew is severe, it may even cause paper jams or incomplete scanned images (missing corners), rendering the equipment malfunction and requiring manual intervention. This not only wastes a lot of time and effort but may also damage the equipment, increasing maintenance costs.

[0066] In view of this, the paper feeding roller, paper feeding mechanism, and office equipment disclosed in this application can concentrate the pressure applied to the paper by the paper feeding roller in the paper feeding mechanism by reducing the contact length between the outer ring portion and the paper in the axial direction of the shaft portion. When papers of different sizes enter the paper feeding mechanism, the paper feeding roller can ensure that the pressure is concentrated on the paper, especially in the middle of the paper along its width direction, thereby effectively avoiding the problem of paper skewing caused by the offset of the pressure application point.

[0067] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0068] Please refer to the following: Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of the structure of the office equipment provided in an embodiment of this application. Figure 2 This is a top view of the office equipment provided in an embodiment of this application. Figure 3 for Figure 2 Sectional view of AA.

[0069] In a first aspect, embodiments of this application disclose an office device 300, including a housing 301 and a paper feeding mechanism 200. The paper feeding mechanism 200 is disposed in the housing 301 and is configured to feed paper A (see...). Figure 5B ).

[0070] The height direction F2 of office equipment 300 extends from its bottom to its top. Office equipment 300 also has a length direction F3 and a width direction F1. The width direction F1 of the paper inlet 303 (i.e., the width direction of the opening of the paper inlet 303 corresponds to the width direction of the paper) is parallel to the width direction F1 of office equipment 300. Among the length direction F3, width direction F1, and height direction F2 of office equipment 300, each pair of directions is perpendicular. That is, the width direction F1 of office equipment 300 is perpendicular to the height direction F2, the width direction F1 is perpendicular to the length direction F3, and the height direction F2 is perpendicular to the length direction F3.

[0071] Optionally, different specifications of paper can refer to paper of different widths, different lengths, or different shapes. In this application, different specifications of paper mainly refer to paper of different widths, wherein the width of the paper is parallel to the width direction F1 of the office equipment 300.

[0072] Optionally, the office equipment 300 may include, but is not limited to, printing equipment, copying equipment, scanning equipment, fax equipment, etc., and this application embodiment does not specifically limit this.

[0073] Optionally, the housing 301 may include a top cover (not shown in the figure), a middle frame (not shown in the figure), and a bottom shell (not shown in the figure). The top cover and the bottom shell are connected to opposite sides of the middle frame along the height direction F2 and enclose a receiving space. The receiving space can be used to install the frame part 302 of the office equipment 300, the paper feeding mechanism 200, the image sensing module, the motherboard, and the power supply, etc.

[0074] In some embodiments, the office equipment 300 further includes a frame portion 302 disposed in the housing 301, and a conveying channel 305 is formed between the frame portion 302 and the paper feeding mechanism 200, the conveying channel 305 being configured to allow paper A to pass through.

[0075] It is understood that the aforementioned conveying channel 305 refers to the path that paper takes from the paper inlet 303 into the office equipment 300 and out through the paper outlet 304. In other words, the conveying direction F5 is the direction in which the paper passes through the conveying channel 305.

[0076] Alternatively, the frame 302 may be made of plastic or metal.

[0077] Optionally, the frame 302 is generally a square frame, used to carry the internal components of the office equipment 300 such as the paper feeding mechanism 200 and the image sensing module, and together with the paper feeding mechanism 200, it forms a conveying channel 305.

[0078] The specific structure of the paper feeding mechanism 200 will be described in detail below.

[0079] Please refer to the following: Figures 4 to 5A ,in, Figure 4 This is a schematic diagram of the paper feeding mechanism provided in an embodiment of this application. Figure 5A for Figure 4 A cross-sectional view of BB. Secondly, embodiments of this application also disclose a paper feeding mechanism 200, including at least one paper feeding roller 100.

[0080] In some embodiments, the paper feed roller 100 is located at the middle of the conveying channel 305 along a first direction. This first direction intersects the direction in which the paper travels through the conveying channel 305 and also intersects the height direction of the conveying channel 305. Specifically, the first direction is actually the same as the width direction F1 of the office equipment 300; that is, the width direction of the paper is parallel to the first direction F1.

[0081] As can be seen, by placing the paper feeding roller 100 in the middle of the conveying channel 305 along the first direction, that is, placing the paper feeding roller 100 in the middle of the paper along its width direction, the pressure applied by the paper feeding roller 100 to the paper can be concentrated in the middle of the paper along its width direction, making the paper more stable during the transmission process and less prone to skewing.

[0082] For example, the paper feed rollers 100 can be one, two, three or four, etc., and the embodiments of this application do not limit this.

[0083] Optionally, the paper feeding mechanism 200 may include multiple sets of conveying rollers. The multiple sets of conveying rollers are located in the frame part 302 and are spaced apart in the conveying channel 305. The multiple sets of conveying rollers can realize the paper conveying based on the principle of friction. In this way, the paper entering from the paper inlet 303 of the office equipment 300 is picked up, scanned and delivered by the office equipment 300 through the action of the multiple sets of conveying rollers.

[0084] In some embodiments, such as Figure 5A As shown, the multiple sets of conveying rollers include a paper-picking roller 201, a paper-splitting roller 202, a scanning roller 203, and a paper-ejecting roller 204. These rollers are arranged sequentially along the paper conveying direction F5. Specifically, the paper-picking roller 201 picks up the paper, the paper-splitting roller 202 separates the paper into individual sheets, the scanning roller 203 guides the paper through the scanning area, and the paper-ejecting roller 204 delivers the scanned paper out of the office equipment 300. By setting up this paper feeding mechanism 200, the paper can be kept stable during conveying, improving the scanning effect and the operational stability of the office equipment 300.

[0085] Optionally, the paper feed rollers 100 include multiple rollers, one of which can be a paper pick-up roller 201, and another can be a paper separation roller 202. By applying the paper feed rollers 100 to the paper pick-up roller 201 and the paper separation roller 202, the stability of the paper conveying process can be further ensured, especially when handling paper of different sizes. This effectively avoids problems such as paper skewing, paper jams, or incomplete scanned images (missing corners), thereby ensuring the quality of scanning or printing operations of the office equipment 300.

[0086] Of course, in other embodiments, the paper feed roller 100 may be only the paper pick-up roller 201, or the paper feed roller 100 may be only the paper separating roller 202, or the paper feed roller 100 may also be the scanning roller 203, or the paper feed roller 100 may also be the paper output roller 204.

[0087] Combination Figure 5A and Figure 5B As shown, where, Figure 5B This is a schematic diagram of the paper feeding mechanism 200 between the contact portion and the paper feeding roller. In some embodiments, the paper feeding mechanism 200 further includes a frame 206 and a contact portion 205. The contact portion 205 is rotatably connected to the frame 206 to contact or move away from the paper feeding roller 201. The contact portion 205 and the paper feeding roller 201 are configured to contact the paper to remove it.

[0088] Optionally, the frame 206 is mounted on the frame portion 302 to support the various components in the paper feeding mechanism 200. The frame 206 may include multiple rollers mounted on the frame portion 302. The abutment portion 205, the paper picking roller 201, the paper separating roller 202, the scanning roller 203, and the paper output roller 204 are rotatably connected to the corresponding rollers to convey the paper by rotating the rollers.

[0089] Optionally, the abutment portion 205 is generally rectangular in shape, with one end rotatably connected to the frame 206, and the other end abutting against or moving away from the paper-feeding roller 201. When the office equipment 300 starts operating as paper A is placed at the paper inlet 303, the paper-feeding roller 201 rotates to deliver the paper. The abutment portion 205, which abuts against the paper-feeding roller 201, is lifted by the paper and rotates relative to the frame 206 away from the paper-feeding roller 201, abutting against paper A (in conjunction with...). Figure 5B At this time, the contact part 205 and the paper picking roller 201 together hold the paper A, ensuring that the paper A can be stably conveyed.

[0090] Optionally, the length L of the contact portion 205 and the paper contact portion 205 along the axial direction F4 of the shaft portion 20 is 5 mm to 30 mm.

[0091] For example, the length L of the contact portion 205 and the contact portion 205 of the paper A along the axial direction F4 of the shaft portion 20 may include, but is not limited to, 5 mm to 10 mm, 10 mm to 15 mm, 15 mm to 20 mm, 20 mm to 25 mm, and 25 mm to 30 mm. Exemplarily, the length L of the contact portion 205 and the contact portion 205 of the paper A along the axial direction F4 of the shaft portion 20 may include, but is not limited to, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, and 30 mm, etc., and this application embodiment does not specifically limit this.

[0092] When the length L of the contact portion 205 and the paper A along the axial direction F4 of the shaft portion 20 is less than 5 mm, the range of the force exerted by the contact portion 205 on the paper A is too small, which makes it impossible for the paper A to be stably clamped and conveyed. This makes the paper A very prone to paper jams during the conveying process, thereby affecting the quality of scanning or printing operations of the office equipment 300.

[0093] When the length L of the contact portion 205 and the paper A along the axial direction F4 of the shaft portion 20 is greater than 30 mm, although the range of the force applied by the contact portion 205 to the paper A can be increased, for different sizes of paper A, the contact area between the contact portion 205 and the paper A is too large, which may cause the force on the paper A during the conveying process to be difficult to concentrate in the middle of the paper A along its width direction, thereby causing the paper A to become skewed, and further increasing the risk of damage to the paper A.

[0094] As can be seen, when the length L of the contact portion 205 and the paper A along the axial direction F4 of the shaft portion 20 is 5 mm to 30 mm, the contact portion 205 can apply an appropriate force to clamp and transport the paper A, ensuring stable paper transport while further ensuring that the force of the contact portion 205 on the paper A is concentrated in the middle of the paper A along its width direction, making the paper A more stable during transport and less prone to skewing.

[0095] Please refer to the following: Figures 5C to 5F ,in, Figure 5C This is a schematic diagram of a structure where paper feeds between two separating rollers. Figure 5D This is a schematic diagram of another structure in which paper feeds between two separating rollers. Figure 5E This is a schematic diagram of another structure in which paper feeds between two separating rollers. Figure 5FThis is a schematic diagram of another structure in which paper feeds between two separating rollers.

[0096] Optionally, the paper separating rollers 202 include two rollers, which are spaced apart along a direction intersecting the conveying direction F5. Both rollers are configured to abut against the paper A to separate it. Both rollers are also paper feed rollers 100. By configuring both rollers 202 as paper feed rollers 100, appropriate pressure can be concentrated on the paper A when different sizes of paper A abut against the rollers 202, thereby achieving the separation and conveying of the paper A and effectively preventing paper A from skewing or jamming.

[0097] It is understandable that when both paper separating rollers 202 are paper feeding rollers 100, the positional relationship between the two paper separating rollers 202 and the paper A includes, but is not limited to, Figures 5C to 5F The embodiments shown all achieve stable feeding of paper A, effectively preventing paper A from being sent skewed or jammed during feeding. It should be noted that the various embodiments in this application are merely examples; other alternative embodiments may also be used. This application does not impose any special limitations on these embodiments, as long as they achieve the purpose of this application.

[0098] To further understand the paper feeding roller 100, the specific structure of the paper feeding roller 100 will be described in detail below.

[0099] Please see Figure 6 ,in, Figure 6 This is a front view of a structure of a paper feeding roller provided in an embodiment of this application. In a third aspect, this application discloses a paper feeding roller 100, including an outer ring portion 10 and a shaft portion 20. The outer ring portion 10 has a first through hole 11 extending along its axial direction F4 (see [link to relevant documentation]). Figure 14 The shaft portion 20 passes through the first through hole 11, so that the outer ring portion 10 protrudes from the outer peripheral surface of the shaft portion 20, and the outer ring portion 10 is at least partially configured to abut against the paper. The shaft portion 20 rotates to drive the outer ring portion 10 to rotate, and the outer ring portion 10 at least partially abuts against the paper, thereby achieving paper transfer through friction between the outer ring portion 10 and the paper.

[0100] Optionally, the outer ring portion 10 may be made of elastic materials, including but not limited to rubber, silicone, or polyurethane. The use of elastic materials not only increases the friction between the outer ring portion 10 and the paper, ensuring stable paper transport, but also reduces wear on the paper to some extent, protecting its integrity. Furthermore, the elastic material also has shock-absorbing properties, absorbing vibrations and impacts generated during paper transport to a certain degree, further ensuring the stability of paper transport.

[0101] For example, the outer ring portion 10 and the shaft portion 20 can be fitted with an interference fit, that is, the outer ring portion 10 is securely mounted on the shaft portion 20 to prevent relative movement or loosening between the outer ring portion 10 and the shaft portion 20 during paper feeding, thereby ensuring the stability and durability of the paper feeding roller 100. Furthermore, using an interference fit can further improve the paper feeding effect of the paper feeding roller 100, ensuring the stability and accuracy of the paper during transport.

[0102] Furthermore, the surface of the outer ring portion 10 may also be provided with a certain texture or uneven structure (for the sake of clearly showing the specific structure of the outer ring portion 10, the texture or uneven structure of the surface of the outer ring portion 10 is omitted; see details). Figures 16 to 18 These textures or embossed structures increase the contact area and friction between the outer ring 10 and the paper, making the paper more stable during transport and less prone to slipping or skewing. Simultaneously, the textures or embossed structures also act as guides, directing the paper along a predetermined path and improving transport accuracy.

[0103] Optionally, the shaft body 20 can be made of materials with a certain strength and rigidity, including but not limited to metal, plastic, or alloy. As a key component supporting the rotation of the outer ring 10, the shaft body 20 needs to possess a certain strength and rigidity to ensure that it does not deform or break during paper transport. Simultaneously, the surface of the shaft body 20 can be treated, such as polishing or grinding, to improve its smoothness and wear resistance, and extend its service life.

[0104] In some embodiments, the portion of the outer ring 10 that abuts against the paper has a length L of 5 mm to 30 mm along the axial direction F4 of the shaft portion 20.

[0105] It is understandable that the axial direction F4 of the shaft body 20 and the axial direction F4 of the outer ring are actually in the same direction.

[0106] For example, the length L of the portion of the outer ring 10 that abuts against the paper along the axial direction F4 of the shaft portion 20 includes, but is not limited to, 5 mm to 10 mm, 10 mm to 15 mm, 15 mm to 20 mm, 20 mm to 25 mm, and 25 mm to 30 mm. Exemplarily, the length L of the portion of the outer ring 10 that abuts against the paper along the axial direction F4 of the shaft portion 20 may include, but is not limited to, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, and 30 mm, etc., and this application embodiment does not specifically limit this.

[0107] When the length L of the portion of the outer ring 10 that abuts against the paper along the axial direction F4 of the shaft portion 20 is less than 5 mm, the range of the force exerted by the outer ring 10 on the paper is too small, causing the paper to be unable to be stably clamped and conveyed, making it very easy for the paper to jam during the conveying process, which in turn affects the quality of scanning or printing operations of the office equipment 300.

[0108] When the length L of the portion of the outer ring 10 that contacts the paper along the axial direction F4 of the shaft portion 20 is greater than 30 mm, although it can increase the range of the force applied by the outer ring 10 to the paper, for different sizes of paper, the contact area between the outer ring 10 and the paper is too large, which may cause the force on the paper during the conveying process to be difficult to concentrate in the middle of the paper along its width direction, thereby causing the paper to become skewed, and further increasing the risk of paper damage.

[0109] As can be seen, when the length L of the outer ring portion 10 that abuts against the paper along the axial direction F4 of the shaft portion 20 is 5 mm to 30 mm, the outer ring portion 10 can apply an appropriate force to clamp and convey the paper, ensuring stable paper conveying while further ensuring that the force of the abutment portion 205 on the paper is concentrated in the middle of the paper along its width direction, making the paper more stable during the conveying process and less prone to skewing.

[0110] In some embodiments, the outer ring portion 10 is located at the middle of the conveying channel 305 along a first direction. This first direction is actually the same as the width direction F1 of the office equipment 300 and the axial direction F4 of the outer ring portion 10.

[0111] That is to say, when the paper is placed in the middle of the conveying channel 305 along the first direction, the outer ring portion 10 can correspond to the middle of the paper along its width direction. In this way, the pressure applied by the outer ring portion 10 to the paper can be concentrated in the middle of the paper along its width direction, so that the paper is subjected to uniform force during the conveying process, and further improves the stability of paper conveying.

[0112] Please refer to the following: Figure 7 ,in, Figure 7 This is a front view of another structure of the paper feeding roller provided in an embodiment of this application. In some embodiments, in the axial direction F4 of the outer ring portion 10, the diameter D1 of the outer ring portion 10 at the center position is larger than the diameter D2 of the outer ring portion 10 at the edge position. This allows the outer ring portion 10 to have a larger contact area and stronger clamping force with the paper at the center position when in contact with the paper, thereby more effectively preventing paper skewing or jamming during transport. Simultaneously, the smaller diameter at the edge position reduces friction between the edge and the paper, lowering the risk of paper damage. Furthermore, this design also makes the outer ring portion 10 rotate more smoothly, further improving the stability and accuracy of paper transport.

[0113] It is understandable that the middle position of the outer ring portion 10 refers to the middle region of the outer ring portion 10 along its axial direction F4, while the edge position of the outer ring portion 10 refers to the regions at both ends of the outer ring portion 10 along its axial direction F4.

[0114] like Figure 7 As shown, optionally, along the axial direction F4 of the outer ring portion 10, the diameter of the outer ring portion 10 gradually increases from the edge to the center, so that the shape of the outer ring portion 10 obtained by the cross-section along the axial direction F4 parallel to the outer ring portion 10 is spindle-shaped. It can be seen that the spindle-shaped outer ring portion 10 design not only provides a larger contact area and stronger clamping force at the center when in contact with the paper, but also ensures the stability of the outer ring portion 10 during rotation. Furthermore, the spindle-shaped outer ring portion 10 can also reduce the friction experienced by the paper during transport to a certain extent, reduce paper wear, and further protect the integrity of the paper.

[0115] Optionally, the difference D between the maximum diameter and the minimum diameter of the outer ring portion 10 is 0.4 mm to 10 mm. By setting the difference between the maximum diameter and the minimum diameter of the outer ring portion 10 within a reasonable range, the stability of the paper during the conveying process can be ensured, while paper wear can be reduced and the integrity of the paper can be protected.

[0116] For example, the difference D between the maximum diameter and the minimum diameter of the outer ring portion 10 may include, but is not limited to, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, etc., and the embodiments of this application do not specifically limit this.

[0117] When the difference between the maximum diameter of the outer ring portion 10 and the minimum diameter of the outer ring portion 10 is less than 0.4 mm, the increase in the contact area between the middle position of the outer ring portion 10 and the paper and the increase in the clamping force are not significant, making it difficult to effectively prevent the paper from skewing or jamming during the conveying process.

[0118] When the difference between the maximum diameter of the outer ring portion 10 and the minimum diameter of the outer ring portion 10 is greater than 10 mm, the overall shape of the outer ring portion 10 may be too protruding, which will require a corresponding increase in the height of the conveying channel 305, thereby increasing the overall size of the office equipment 300, which is not conducive to the miniaturization and lightweight design of the office equipment 300.

[0119] Optionally, the outer ring portion 10 has an arc-shaped surface 13, the radius of curvature R of which is 1 / 275 to 1 / 25. The arc-shaped surface 13 of the outer ring portion 10 allows for a larger contact area and stronger clamping force between the center of the outer ring portion 10 and the paper when in contact, thus more effectively preventing paper skewing or jamming during transport. Simultaneously, the smaller diameter at the edges of the outer ring portion 10 reduces friction between the edges and the paper, lowering the risk of paper damage. Furthermore, this design makes the outer ring portion 10 rotate more smoothly, further improving the stability and accuracy of paper transport. Moreover, the appropriate setting of the radius of curvature R of the arc-shaped surface 13 ensures the stability of the paper during transport while reducing the possibility of wear caused by the outer ring portion 10, thereby guaranteeing the integrity of the paper. For example, the radius of curvature R of the arc surface 13 may include, but is not limited to, 1 / 275, 1 / 270, 1 / 265, 1 / 260, 1 / 255, 1 / 250, 1 / 225, 1 / 200, 1 / 175, 1 / 150, 1 / 125, 1 / 100, 1 / 75, 1 / 50, 1 / 25, etc., and the embodiments of this application do not specifically limit it.

[0120] When the radius of curvature R of the arc surface 13 is less than 1 / 275, the increase in contact area and clamping force between the outer ring 10 and the paper at the middle position is not significant, making it difficult to effectively prevent the paper from skewing or jamming during transmission.

[0121] When the radius of curvature R of the arc surface 13 is greater than 1 / 25, the overall shape of the outer ring 10 may be too protruding, which will require a corresponding increase in the height of the transmission channel 305, resulting in an increase in the overall structure of the office equipment 300, which is not conducive to the miniaturization and lightweight design of the office equipment 300.

[0122] Please refer to the following: Figures 8 to 10 ,in, Figure 8 This is a front view of yet another structure of the paper feeding roller provided in an embodiment of this application. Figure 9 This is a front view of yet another structure of the paper feeding roller provided in an embodiment of this application. Figure 10 This is a front view of yet another structure of the paper feeding roller provided in an embodiment of this application.

[0123] In some embodiments, the outer ring portion 10 includes a main body portion 16 and two edge portions 17, which are respectively disposed on both sides of the main body portion 16 along the axial direction F4 of the outer ring portion 10. The diameter of the edge portions 17 is smaller than the diameter of the main body portion 16, and the main body portion 16 is used to abut against the paper.

[0124] By setting the diameter D3 of the edge portion 17 to be smaller than the diameter D4 of the main body portion 16, the main body portion 16 protrudes from the edge portion 17 and contacts the paper. When the edge portion 17 bends and warps due to heat or external force (such as the friction generated when the outer ring portion 10 is fitted into the shaft portion 20), the main body portion 16 provides a certain deformation space for the edge portion 17. Even if the edge portion 17 warps, it will not contact the paper, thereby effectively avoiding interference of the edge portion 17 with the paper conveying process, and thus ensuring the stability of the paper during the conveying process.

[0125] For example, such as Figure 8 As shown, the main body portion 16 is rectangular in shape when cut by a cross section parallel to the axial direction F4 of the outer ring portion 10, and the edge portion 17 is trapezoidal in shape when cut by a cross section parallel to the axial direction F4 of the outer ring portion 10.

[0126] Another example, such as Figure 9 As shown, the main body portion 16 is rectangular in shape when cut by a cross section parallel to the axial direction F4 of the outer ring portion 10, and the edge portion 17 is rectangular in shape when cut by a cross section parallel to the axial direction F4 of the outer ring portion 10.

[0127] Another example, such as Figure 10 As shown, the main body portion 16 is shaped like a spindle when cut by a cross section parallel to the axial direction F4 of the outer ring portion 10, and the edge portion 17 is shaped like a rectangle when cut by a cross section parallel to the axial direction F4 of the outer ring portion 10.

[0128] In all the above examples, the main body 16 protrudes beyond the edge 17 and contacts the paper. When the edge 17 bends and warps due to heat or external force (such as the friction generated when the outer ring 10 is fitted into the shaft 20), the main body 16 provides a certain deformation space for the edge 17. Even if the edge 17 warps, it will not contact the paper, thereby effectively avoiding interference from the edge 17 to the paper conveying process and ensuring the stability of the paper during the conveying process.

[0129] Please refer to the following: Figures 11 to 13 ,in, Figure 11 This is a front view of yet another structure of the paper feeding roller provided in an embodiment of this application. Figure 12 This is a front view of yet another structure of the paper feeding roller provided in an embodiment of this application. Figure 13 This is a front view of another structure of the paper feed roller provided in an embodiment of this application. In some embodiments, a recess 21 is formed at the center of the outer peripheral surface of the shaft portion 20 along its axial direction F4. The outer ring portion 10 includes a first portion 14 and a second portion 15, which are respectively disposed on both sides of the recess 21 along the axial direction F4 of the shaft portion 20. The recess 21 is configured to accommodate a sensor (not shown) for detecting the paper state. By dividing the outer ring portion 10 into a first portion 14 and a second portion 15 and disposing them on both sides of the recess 21 along the axial direction F4, clearance space is provided for the sensor. By using the sensor to detect the paper state, the office equipment 300 can obtain information such as the presence, position, and thickness of the paper for precise control of paper transport.

[0130] It is understood that the first part 14 includes a main body part 16 and an edge part 17, and the second part 15 includes another main body part 16 and another edge part 17. The main body part 16 and the other main body part 16 are spaced apart to provide clearance space for accommodating the sensor. The outer ring portion 10, which is formed by the first part 14 and the second part 15, also satisfies that the length L of the portion of the outer ring portion 10 that abuts against the paper is 5 mm to 30 mm along the axial direction F4 of the shaft portion 20, and the main body portion 16 is divided into two halves for abutting against the paper.

[0131] It is understood that the first part 14 and the second part 15 are symmetrical structures distributed symmetrically about the central axis of the recess 21, wherein the central axis of the recess 21 is perpendicular to the axial direction F4 of the outer ring 10. The shapes of the first part 14 and the second part 15 will be described in detail below.

[0132] For example, such as Figure 11 As shown, the first part 14 is rectangular in shape when cut by a cross section parallel to the axial direction F4 of the outer ring 10, and the second part 15 is also rectangular in shape when cut by a cross section parallel to the axial direction F4 of the outer ring 10.

[0133] Another example, such as Figure 12 As shown, the first part 14 is cut into a stepped shape by a cross section parallel to the axial direction F4 of the outer ring 10, and the second part 15 is also cut into a stepped shape by a cross section parallel to the axial direction F4 of the outer ring 10.

[0134] Another example, such as Figure 13 As shown, the first part 14 is cut into a semi-spindle shape by a cross section parallel to the axial direction F4 of the outer ring 10, and the second part 15 is also cut into a semi-spindle shape by a cross section parallel to the axial direction F4 of the outer ring 10.

[0135] In all the examples above, space is provided for the sensor to avoid obstacles. The sensor detects the state of the paper, enabling the office equipment 300 to obtain information such as the presence, position, and thickness of the paper for precise control of paper delivery.

[0136] Optionally, the sensor includes a sensor body and a detection unit. The detection unit is rotatably connected to the frame 206. The sensor body is configured to detect the rotation state of the detection unit to obtain paper status information. By accommodating the detection unit in the recess 21, the overall structure of the paper feeding mechanism 200 can be made more compact, which helps to reduce the space occupied by the entire office equipment 300.

[0137] Specifically, the detection unit is roughly elongated in shape. One end of the detection unit is rotatably connected to the frame 206, and the other end of the detection unit abuts against or moves away from the recess 21. As the paper is placed at the paper inlet 303, the paper pushes up the detection unit located at the paper inlet 303, causing the detection unit to rotate. The sensor body obtains the paper's state information by detecting the rotation state of the detection unit in order to determine whether there is paper in the conveying channel 305.

[0138] For example, the sensor body can be a photoelectric sensor, which is set on the frame 206. When the paper enters the paper feed port 303, it pushes up the detection part, causing the detection part to rotate. Thus, the sensor body can obtain the paper status information (e.g., the paper has entered the paper feed port 303) based on the rotation of the detection part.

[0139] Please refer to the following: Figures 14 to 15 ,in, Figure 14 This is an exploded view of one structure of the paper feeding roller provided in an embodiment of this application. Figure 15 This is an exploded view of another structure of the paper feeding roller provided in the embodiments of this application. In some embodiments, the shaft portion 20 includes a receiving portion 22 and a shaft core portion 23. The diameter of the receiving portion 22 is smaller than the diameter of the shaft core portion 23. The receiving portion 22 is configured to receive the outer ring portion 10. The shaft core portion 23 is rotatably connected to the frame 206 of the paper feeding mechanism 200 to drive the outer ring portion 10 to rotate.

[0140] The shape of the receiving portion 22 matches the shape of the first through hole 11 of the outer ring portion 10, and can provide a limiting function for the outer ring portion 10. The shape of the receiving portion 22 will be described in detail below.

[0141] For example, such as Figure 14 As shown, the first through hole 11 of the outer ring portion 10 is rectangular in shape when cut by a cross section along the axial direction F4 parallel to the outer ring portion 10. Correspondingly, the receiving portion 22 is also rectangular in shape when cut by a cross section along the axial direction F4 parallel to the outer ring portion 10.

[0142] Another example, such as Figure 15 As shown, the first through hole 11 of the outer ring portion 10 is cut into a spindle shape by a cross section along the axial direction F4 parallel to the outer ring portion 10. Correspondingly, the receiving portion 22 is also cut into a spindle shape by a cross section along the axial direction F4 parallel to the outer ring portion 10.

[0143] Please refer to the following: Figures 16 to 17 ,in, Figure 16 This is an exploded view of yet another structure of the paper feeding roller provided in the embodiments of this application. Figure 17 This is an exploded view of another structure of the paper feeding roller provided in the embodiments of this application. Optionally, the receiving portion 22 is provided with first grooves 221 at both ends along its axial direction F4. The first grooves 221 are used to receive the edge portion 17 of the outer ring portion 10 to limit the edge portion 17 of the outer ring portion 10, prevent the outer ring portion 10 from axially moving on the shaft portion 20, ensure the relative position between the outer ring portion 10 and the shaft portion 20 is stable, and thus ensure the stability and accuracy of paper feeding.

[0144] The outer ring portion 10 can be integrally molded (see...). Figure 16 Of course, as another embodiment, the outer ring portion 10 can also be configured as a split piece (see...). Figure 17 This application does not specifically limit this aspect in the embodiments.

[0145] Please see Figure 18 ,in, Figure 18 This is an exploded view of another structure of the paper feeding roller provided in the embodiments of this application. Optionally, the recess 21 is formed in the middle of the receiving portion 22 along its axial direction F4, and the receiving portion 22 is provided with second grooves 222 at both ends along its axial direction F4. The first part 14 and the second part 15 are respectively provided at both ends of the receiving portion 22 along its axial direction F4. Similarly, the second grooves 222 are used to limit the first part 14 and the second part 15, and to improve the connection strength between the first part 14 and the second part 15 and the shaft portion 20, thereby ensuring the stability of paper feeding.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A paper feed roller (100) characterized by, include: The outer ring portion (10) has a first through hole (11) extending through it in the axial direction (F1); and A shaft portion (20) is provided through the first through hole (11) so that the outer ring portion (10) protrudes from the outer peripheral surface of the shaft portion (20), and the outer ring portion (10) is at least partially configured to abut against the paper (A). The length L of the portion of the outer ring (10) that abuts against the paper (A) along the axial direction (F1) of the shaft portion (20) is 5 mm to 30 mm.

2. Paper roller (100) according to claim 1, characterized in that In the axial direction (F1) of the outer ring portion (10), the diameter of the outer ring portion (10) at the middle position is greater than the diameter of the outer ring portion (10) at the edge position.

3. Paper roller (100) according to claim 2, characterized in that Along the axial direction (F1) of the outer ring portion (10), the diameter of the outer ring portion (10) gradually increases from the edge to the center, so that the shape of the outer ring portion (10) cut by a cross section parallel to the axial direction (F1) of the outer ring portion (10) is spindle-shaped.

4. Paper roller (100) according to claim 3, characterized in that The difference between the maximum diameter and the minimum diameter of the outer ring portion (10) is 0.4 mm to 10 mm; and / or, The outer ring (10) has an arcuate surface (13) with a radius of curvature R of 1 / 275 to 1 / 25.

5. Paper roller (100) according to claim 2, characterized in that The outer ring portion (10) includes a main body portion (16) and two edge portions (17). The two edge portions (17) are respectively disposed on both sides of the main body portion (16) along the axial direction (F1) of the outer ring portion (10). The diameter of the edge portion (17) is smaller than the diameter of the main body portion (16). The main body portion (16) is used to abut against the paper (A).

6. Paper roller (100) according to any one of claims 1-5, characterized in that A recess (21) is formed on the outer peripheral surface of the shaft portion (20) along the middle of its axial direction (F1). The outer ring portion (10) includes a first part (14) and a second part (15). The first part (14) and the second part (15) are respectively provided on both sides of the recess (21) along the axial direction (F1) of the shaft portion (20). The recess (21) is configured to accommodate a sensor for detecting the state of paper.

7. A paper feeding mechanism (200), characterized in that, Includes at least one paper feed roller (100) as described in any one of claims 1-6.

8. The paper feeding mechanism (200) according to claim 7, characterized in that, The paper feeding mechanism (200) includes a paper picking roller (201), a paper separating roller (202), a scanning roller (203), and a paper output roller (204). The paper picking roller (201), the paper separating roller (202), the scanning roller (203), and the paper output roller (204) are arranged sequentially along the conveying direction (F2) of the paper (A). The paper feeding rollers (100) include a plurality of rollers, one of which is the paper picking roller (201), and the other is the paper separating roller (202).

9. The paper feeding mechanism (200) according to claim 8, characterized in that, The paper feeding mechanism (200) further includes a frame (206) and an abutment (205). The abutment is rotatably connected to the frame (206) to abut against or move away from the paper picking roller (201). The abutment (205) and the paper picking roller (201) are configured to abut against the paper (A) to pick up the paper (A). The length L of the contact portion (205) and the contact portion of the paper (A) along the axial direction (F1) of the shaft portion (20) is 5 mm to 30 mm; And / or, The paper separating rollers (202) include two, which are spaced apart along a direction intersecting the conveying direction (F2). The two paper separating rollers (202) are configured to abut against the paper (A) to separate the paper (A). Both paper separating rollers (202) are the paper feeding rollers (100).

10. An office device (300), characterized in that, Includes a housing (301) and a paper feeding mechanism (200) as claimed in any one of claims 7-9, the paper feeding mechanism (200) being disposed in the housing (301) and configured to feed paper (A).

11. The office equipment (300) according to claim 10, characterized in that, The office equipment (300) also includes a frame (302) disposed in the housing (301), and a conveying channel (305) is formed between the frame (302) and the paper feeding mechanism (200). The conveying channel (305) is configured to allow paper (A) to pass through, and the outer ring (10) is located at the middle of the conveying channel (305) along the first direction (F1). The first direction (F1) intersects the direction of the paper (A) through the conveying channel (305) and also intersects the height direction (F3) of the conveying channel (305).

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