Sheet feeder and image forming apparatus

Abstract

The utility model relates to a paper feeding device and an image forming apparatus. The paper feeding device comprises a first housing; the second shell is arranged below the first shell; the paper taking wheel is arranged on the first shell and located above a paper feeding tray of the paper feeding device, and the paper taking wheel pushes paper in the paper feeding tray in the paper feeding direction through friction force. And the paper pressing assembly is movably arranged on the first shell, and the paper pressing assembly can downwards abut against the paper entering the paper taking wheel when the thickness of the paper in the paper feeding tray is larger than the paper pressing height of the paper pressing assembly. According to the technical scheme, the technical problems that in the paper feeding process of a traditional paper feeding device, paper wrinkles are prone to occurring, paper is damaged, and paper cannot be continuously fed are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic paper feeding, and in particular to a paper feeding device and an image forming apparatus. BACKGROUND

[0002] In an image forming apparatus such as a copier or a scanner, a paper feeding device is generally configured to automatically feed paper into the apparatus to realize functions such as copying or scanning. In a paper feeding channel of a conventional paper feeding device, a paper taking wheel and a paper separating wheel are generally arranged in sequence. A friction sheet is arranged below the paper taking wheel in a spaced-apart manner, and cooperates with the paper taking wheel to push the paper in a paper tray in the direction of the paper separating wheel by using friction. At this time, multiple pieces of paper may enter the area of the paper separating wheel at the same time. A friction wheel is arranged below the paper separating wheel in a spaced-apart manner, and cooperates with the paper separating wheel to block the extra paper conveyed by the paper taking wheel and make the paper pass through one by one to enter a paper scanning or copying channel to complete image scanning or copying. However, compared with the area of the paper, the contact area of the paper taking wheel and the paper is relatively small, and when the paper passes between the paper taking wheel and the friction sheet, the paper speed in the axial direction of the paper taking wheel is different, and the paper on both sides is easy to move and bend in the middle to form wrinkles, causing damage to the paper and making it impossible to continue to feed the paper. Therefore, a new paper feeding device that can effectively prevent the paper from wrinkling at the paper taking wheel is continuously sought. SUMMARY

[0003] The present application provides a paper feeding device and an image forming apparatus to solve the technical problem that the conventional paper feeding device is easy to cause paper wrinkles during paper feeding, resulting in paper damage and making it impossible to continue to feed the paper.

[0004] To this end, in a first aspect, the embodiments of the present application provide a paper feeding device, which comprises: a first housing; a second housing arranged below the first housing; a paper taking wheel arranged in the first housing and located above a paper tray of the paper feeding device, the paper taking wheel pushing the paper in the paper tray in a paper feeding direction by using friction; and a paper pressing assembly movably arranged in the first housing, the paper pressing assembly being capable of downwardly pressing the paper entering the paper taking wheel when the thickness of the paper in the paper tray is greater than the paper pressing height of the paper pressing assembly.

[0005] In a possible implementation, the paper pressing assembly comprises a first paper pressing member and an elastic member, and the first paper pressing member is movably connected to the first housing by the elastic member.

[0006] In a possible implementation, the first paper pressing member comprises a first paper pressing portion and a first connecting portion connected to each other, the first paper pressing portion is connected to the first housing by the first connecting portion, the first paper pressing portion extends out of the first housing and extends towards the direction close to the paper tray, and the elastic member is arranged between the first connecting portion and the inner wall of the first housing.

[0007] In a possible implementation, the first shell comprises an outer shell and an inner frame, the outer shell is arranged on the outer side of the inner frame, the inner frame is provided with a movable channel, a bottom wall of the movable channel extends inwardly to form a limiting portion, the first connecting portion is clamped to the limiting portion, and the elastic member is arranged between the first connecting portion and the outer shell and located in the movable channel.

[0008] In a possible implementation, the first shell is provided with a connecting piece, the connecting piece is located above the paper tray, and the paper pressing assembly comprises a second paper pressing piece, the second paper pressing piece is rotationally connected to the connecting piece.

[0009] In a possible implementation, the second paper pressing piece comprises a second paper pressing portion, a second connecting portion and a reinforcing rib, the second connecting portion is arranged on the outer side of the second paper pressing portion, the second paper pressing portion is rotationally connected to the connecting piece through the second connecting portion, and the reinforcing rib is arranged on the side of the second paper pressing portion away from the paper tray.

[0010] In a possible implementation, the paper pressing assembly further comprises a limiting piece, the limiting piece is arranged on the first shell and located on the inner side of the connecting piece, and the side of the second paper pressing piece facing the first shell can abut against the limiting piece.

[0011] In a possible implementation, the length of the limiting piece in the paper feeding direction is adjustable.

[0012] In a possible implementation, the paper pressing assembly further comprises a chamfer structure, the chamfer structure is arranged at the abutting position of the paper pressing assembly and the paper material; and / or,

[0013] The paper pressing assembly further comprises a paper separating wheel and a friction wheel, the paper separating wheel is arranged on the first shell, the friction wheel is arranged on the second shell corresponding to the paper separating wheel, and the paper separating wheel and the friction wheel are sequentially arranged in the paper feeding direction.

[0014] In a second aspect, the embodiments of the present application further provide an image forming device, comprising an image forming part and the paper feeding device as described above, and the image forming part is used for forming an image on the paper material conveyed by the paper feeding device.

[0015] According to the paper feeding device and the image forming equipment provided by the embodiment of the present application, the paper feeding device comprises: a first shell; a second shell arranged below the first shell; a paper taking wheel arranged in the first shell and located above a paper tray of the paper feeding device, the paper taking wheel pushes the paper in the paper tray in a paper feeding direction by using friction; and a paper pressing assembly movably arranged in the first shell, the paper pressing assembly can press the paper entering the paper taking wheel downward when the thickness of the paper in the paper tray is greater than the paper pressing height of the paper pressing assembly. The technical scheme of the present application adds a paper pressing assembly at the paper feeding end to provide a downward pressing force for the paper exceeding the paper pressing height, which can increase the contact area between the paper feeding end of the paper feeding device and the paper, increase the friction between the paper feeding end and the paper, facilitate the paper taking wheel to push the paper, make the paper walking speed of the paper in the axial direction of the paper taking wheel uniform, prevent the problem that the two ends of the paper gather to the middle due to the different paper walking speeds of the paper in the axial direction of the paper taking wheel, make the paper continue to walk in a flat state, reduce the probability of paper creases, improve the paper walking smoothness and the paper walking effect, and improve the overall performance of the paper feeding device. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated by reference in the specification and forming a part thereof illustrate embodiments consistent with the present application and together with the description serve to explain the principles of the application. In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings can also provide the basis for the person of ordinary skill in the art to obtain other drawings without creative effort. One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings, and the exemplarily illustrations do not constitute a limitation on the embodiments. The elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings do not constitute a proportion limit.

[0017] Figure 1 A sectional view of the paper feeding device provided by the first embodiment of the present application;

[0018] Figure 2 A partial enlarged view of Figure 1 ;

[0019] Figure 3 A simplified view of Figure 1 ;

[0020] Figure 4 A sectional view of A-A in Figure 3 ;

[0021] Figure 5 A sectional view of the paper feeding device provided by the second embodiment of the present application;

[0022] Figure 6 AFigure 5 a local enlarged view of the paper pressing assembly of the paper feeding device of the second embodiment of the present application;

[0023] Figure 7 a flip state diagram of the paper pressing assembly of the paper feeding device provided for the second embodiment of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 100, first housing; 110, outer shell; 120, inner frame; 121, limiting part; 130, connecting piece;

[0026] 200, second housing; 300, paper taking wheel;

[0027] 400, paper pressing assembly; 410, first paper pressing piece; 411, first paper pressing part; 412, first connecting part; 420, elastic piece; 430, second paper pressing piece; 431, second paper pressing part; 432, second connecting part; 433, reinforcing rib; 440, limiting piece; 450, chamfer structure;

[0028] 500, paper separating wheel; 600, friction wheel;

[0029] 10, paper feeding tray; 20, paper material; X, paper feeding direction. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described in the following. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to the numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art can realize the applicability of other processes and / or the use of other materials.

[0032] For the convenience of description, spatial relative terms can be used in the specification to describe the relative position relationship or movement condition of one element or feature relative to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the upper and lower positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the specification are interpreted accordingly.

[0033] Referring to Figure 1 and Figure 5 , the embodiment of the present application provides a paper feeding device, comprising: a first housing 100; a second housing 200 arranged below the first housing 100; a paper taking wheel 300 arranged in the first housing 100 and located above a paper tray 10 of the paper feeding device, the paper taking wheel 300 pushes the paper 20 in the paper tray 10 in the paper feeding direction X by friction; and a paper pressing assembly 400 movably arranged in the first housing 100, the paper pressing assembly 400 can downwardly press the paper 20 entering the paper taking wheel 300 when the thickness of the paper 20 in the paper tray 10 is greater than the paper pressing height of the paper pressing assembly 400.

[0034] The embodiment adds a paper pressing assembly 400 at the paper feeding end to provide a downward pressing force to the paper 20 exceeding the paper pressing height, which can increase the contact area between the paper feeding end of the paper feeding device and the paper 20, increase the friction between them, facilitate the paper taking wheel 300 to push the paper 20, make the paper walking speed of the paper 20 in the axial direction of the paper taking wheel 300 uniform, prevent the problem that the two ends of the paper 20 gather to the middle due to different paper walking speeds of the paper 20 in the axial direction of the paper taking wheel 300, make the paper 20 continue to walk in a flat state, reduce the probability of paper 20 wrinkling, improve the paper walking smoothness and paper walking effect, and improve the overall performance of the paper feeding device.

[0035] Specifically, the paper feeding device is configured as a combined component including at least a first shell 100, a second shell 200, a paper taking wheel 300, and a paper pressing assembly 400. The first shell 100 can be a plastic part, which provides mounting space and support force for the paper taking wheel 300 and the paper pressing assembly 400. The second shell 200 is a plastic part, which is arranged below the first shell 100 in a spaced manner, and provides mounting position and support force for the paper feeding tray 10. The paper taking wheel 300 can be a roller structure part that can rotate around its axis, such as a flexible rubber wheel or a hard plastic wheel with a brush outside, and the like. The paper taking wheel 300 can be driven to rotate by a motor. When the paper taking wheel 300 contacts the paper material 20 and rotates, a friction force is generated between the paper taking wheel 300 and the paper material 20. The paper material 20 is driven by the friction force to move in the paper feeding direction X, thereby realizing the paper taking operation of the paper material 20 in the paper feeding tray 10. The paper pressing assembly 400 can be a pressing plate structure, which is movably arranged on the first shell 100 and located behind the paper taking wheel 300. In this way, the paper material 20 in the paper feeding tray 10 first passes through the paper pressing assembly 400 and then enters the corresponding paper feeding passage of the paper taking wheel 300. The paper pressing assembly 400 has at least two states, i.e., a natural state and a pressing state. In the natural state, the paper pressing assembly 400 naturally droops and does not contact the paper material 20 in the paper feeding tray 10, so that the paper material 20 can freely enter the paper taking wheel 300. At this time, the total thickness of the paper material 20 in the paper feeding tray 10 is less than or equal to the paper pressing height of the paper pressing assembly 400, that is, the total thickness of the paper material 20 in the paper feeding tray 10 is less than or equal to the height of the lowest end of the paper pressing assembly 400. In the pressing state, the paper pressing assembly 400 is pressed above the paper material 20 and gives the paper material 20 a downward pressing force, so that the paper material 20 is pressed flat and can enter the corresponding paper feeding passage of the paper taking wheel 300 smoothly, thereby preventing the paper material 20 from being wrinkled when being fed. At this time, the total thickness of the paper material 20 in the paper feeding tray 10 is greater than the paper pressing height of the paper pressing assembly 400, that is, the total thickness of the paper material 20 in the paper feeding tray 10 is greater than the height of the lowest end of the paper pressing assembly 400. In this way, at least the problem that, when the thickness of the paper material in the paper feeding tray 10 is too large, only relying on the paper taking wheel 300 to press the paper material 20 causes the contact area between the paper feeding end of the paper feeding device and the paper material 20 to be too small, and the walking speed of the paper material 20 in the axial direction of the paper taking wheel 300 is different, and the two ends of the paper material 20 are easily gathered to the middle to cause the paper material 20 to be wrinkled when being fed can be solved, the smoothness and effect of the paper feeding are improved, and the user experience is improved.

[0036] In an example, the paper feeding tray 10 can be movably inserted into the paper feeding end of the second shell 200, so as to facilitate the user to subsequently add the paper material 20. The paper feeding tray 10 is provided with guide limiting plates on both sides in the paper feeding direction X, so as to provide a guiding effect for the paper feeding tray 10 when the paper feeding tray 10 is pulled out, and make the paper feeding tray 10 be assembled in a predetermined direction, thereby improving the assembly precision and efficiency of the paper feeding tray 10.

[0037] It can be understood that the paper feeding device provided by the embodiment can be a partial structure of an imaging device such as a scanner, a photocopier, a printer, a copier or the like, or can be a separate device for cutting the paper 20.

[0038] As shown in Figure 1 , Figure 2 and Figure 4 , in a possible implementation, the paper pressing assembly 400 includes a first paper pressing member 410 and an elastic member 420, and the first paper pressing member 410 is movably connected to the first housing 100 through the elastic member 420.

[0039] In the embodiment, the specific configuration of the paper pressing assembly 400 is optimized. Specifically, the paper pressing assembly 400 is configured as a combined member including at least the first paper pressing member 410 and the elastic member 420. The first paper pressing member 410 can be a strip-shaped pressing plate, one end of which is inserted into the first housing 100 to ensure that the first paper pressing member 410 is not separated from the first housing 100, thereby improving the connection reliability of the paper pressing assembly 400 and the first housing 100. The other end of the first paper pressing member 410 extends out of the first housing 100 and extends towards the paper feeding tray 10, so as to press on the paper 20 when the thickness of the paper 20 in the paper feeding tray 10 is higher than the paper pressing height, to provide the paper 20 with a downward pressing force, increase the frictional force of the paper 20 in the paper feeding direction X, slow down the paper feeding speed of the paper 20, prevent the paper feeding speed of the paper 20 from being too large and the pressing force of the paper 20 on the paper taking wheel 300 from being too small, cause the paper 20 to gather at both ends and the middle to generate wrinkles, and improve the smoothness of the paper feeding. The elastic member 420 can be a spring, which is arranged between the first paper pressing member 410 and the first housing 100 and used to provide the first paper pressing member 410 with an elastic force in the downward direction. On one hand, the elastic force can provide the paper 20 with a downward pressing force when the first paper pressing member 410 presses on the paper 20. On the other hand, the elastic force can make the first paper pressing member 410 return to the original position for the next use. The paper pressing assembly 400 provided in the example provides the paper 20 with a pressing force from at least the gravity of the first paper pressing member 410 and the elastic force of the elastic member 420, so that the pressing effect on the paper 20 is better and the anti-wrinkling effect is better.

[0040] In an example, the elastic member 420 can be provided in a plurality of elastic members 420, which are distributed in a direction perpendicular to the paper feeding direction X. The plurality of elastic members 420 can provide the first paper pressing member 410 with uniform elastic forces in the distribution direction, thereby improving the flexibility of the paper pressing assembly 400.

[0041] As shown in Figure 2 and Figure 4As shown, in a possible implementation, the first paper pressing member 410 comprises a first paper pressing part 411 and a first connecting part 412 connected together, the first paper pressing part 411 is connected to the first housing 100 through the first connecting part 412, the first paper pressing part 411 extends out of the first housing 100 and extends towards the direction close to the paper tray 10, and the elastic member 420 is arranged between the first connecting part 412 and the inner wall of the first housing 100.

[0042] In this embodiment, the specific configuration of the first paper pressing member 410 is optimized. Specifically, the first paper pressing member 410 is configured as a combined member comprising at least the first paper pressing part 411 and the first connecting part 412. The first paper pressing part 411 can be a long strip structure with a hook part, which extends in the axial direction of the paper taking wheel 300 to press the paper material 20 flat in the axial direction of the paper taking wheel 300 when the paper material 20 is running, thereby preventing the phenomenon that the paper material 20 gathers in the middle due to the excessive paper running speed in the middle and the insufficient paper running speed on both sides, and improving the anti-wrinkling effect of the paper material 20. The first connecting part 412 can be a long strip plate structure, which extends in the same direction as the first paper pressing part 411 and has two ends extending out of the first paper pressing part 411, so that the first paper pressing member 410 can be rotatably connected to the first housing 100 through the extending part of the first connecting part 412, and the elastic member 420 is arranged between the side of the first connecting part 412 away from the first paper pressing part 411 and the inner wall of the top of the first housing 100. In this way, when the paper pressing assembly 400 is in a natural state, the elastic member 420 is in a natural state, the side of the first connecting part 412 towards the first paper pressing part 411 abuts against and is limited by the inner wall of the bottom of the first housing 100, and the first paper pressing member 410 naturally droops downward. When the paper pressing assembly 400 is in a pressing state, the elastic member 420 is in a compressed state, the side of the first connecting part 412 towards the first paper pressing part 411 is away from the bottom wall of the first housing 100, the first paper pressing member 410 is lifted upward and presses against the paper material 20. At this time, the paper pressing assembly 400 presses the paper material 20 tightly under the elastic force of the elastic member 420 and the gravity of the first paper pressing member 410, and makes the paper material 20 unfold and be pressed flat, thereby reducing the paper running wrinkles. The structure of the first paper pressing member 410 provided in this example is simple, convenient to process, and has better flattening effect on the paper material 20.

[0043] As shown in Figure 2 and Figure 4 In a possible implementation, the first housing 100 comprises an outer shell 110 and an inner frame 120, the outer shell 110 covers the outer side of the inner frame 120, the inner frame 120 is provided with a movable channel, the bottom wall of the movable channel extends inward to form a limiting part 121, the first connecting part 412 is clamped in the limiting part 121, and the elastic member 420 is arranged between the first connecting part 412 and the outer shell 110 and located in the movable channel.

[0044] In this embodiment, the specific configuration of the first shell 100 is optimized. Specifically, the first shell 100 is configured as a combined member including at least an outer shell 110 and an inner frame 120. The outer shell 110 can be a plate-like structure in the shape of an L, and the inner frame 120 can be a frame structure in the shape of an L. The outer shell 110 can be connected to the outer side of the inner frame 120 by fasteners such as buckles and screws / bolts, and together with the inner frame 120, forms a moving channel for the reciprocating movement of the paper pressing assembly 400. The elastic member 420, the first connecting portion 412, and part of the first paper pressing portion 411 move up and down in the moving channel to achieve the pressing and flattening of the paper material 20. The first shell 100 provided in this example has high coordination with the paper pressing assembly 400, the overall structure is more compact, occupies less space, and is conducive to the miniaturization of the paper feeding device.

[0045] As shown in Figure 4 In an example, the outer shell 110 is provided with a limiting sleeve on one side facing the inner frame 120, the first connecting portion 412 is provided with a limiting convex at a position corresponding to the limiting sleeve, one end of the elastic member 420 is accommodated in the limiting hole of the limiting sleeve, and the other end is sleeved outside the limiting convex. In this way, the position of the elastic member 420 can be limited to prevent it from shifting during compression and expansion, thereby improving the structural stability and reliability of the paper pressing assembly 400. In addition, the elastic member 420 can move accurately on the specified path, and the elastic force generated thereby can act accurately on the paper material 20, thereby improving the pressing effect on the paper material 20. In addition, the end of the outer shell 110 facing the paper feeding tray 10 can protrude outwardly beyond the inner frame 120 to enhance the waterproof and dustproof protection of the front side of the inner frame 120.

[0046] As shown in Figures 5 to 7 In a possible implementation, the first shell 100 is provided with a connecting member 130 above the paper feeding tray 10, and the paper pressing assembly 400 includes a second paper pressing member 430 rotatably connected to the connecting member 130.

[0047] In this embodiment, the specific configuration of the paper pressing assembly 400 and the first shell 100 is optimized. Specifically, the connecting member 130 protruding outwardly is arranged on the end of the first shell 100 facing the paper feeding tray 10. The connecting member 130 can be a hook-shaped structure with the hook opening facing upward. At least two connecting members 130 can be provided, and the two connecting members 130 are arranged in the axial direction of the paper taking wheel 300. Meanwhile, the second paper pressing member 430 of the paper pressing assembly 400 is inserted into the hook hole of the connecting member 130 to realize the rotational connection of the second paper pressing member 430 with the connecting member 130. In this example, the pressing force of the paper pressing assembly 400 on the paper material 20 is at least from the gravity of the second paper pressing member 430 itself, which has a simple structure, is convenient to process, and has low cost.

[0048] As shown in Figure 6As shown, in a possible implementation, the second paper pressing member 430 includes a second paper pressing part 431, a second connecting part 432, and a reinforcing rib 433. The second connecting part 432 is arranged at the outer side of the second paper pressing part 431, and the second paper pressing part 431 is rotatably connected to the connecting member 130 through the second connecting part 432. The reinforcing rib 433 is arranged at the side of the second paper pressing part 431 away from the paper tray 10.

[0049] In this embodiment, the specific configuration of the second paper pressing member 430 is optimized. Specifically, the second paper pressing member 430 is configured as a combined member including at least the second paper pressing part 431, the second connecting part 432, and the reinforcing rib 433. The second paper pressing part 431 can be a structure similar to a spoon, extending along the axial direction of the paper taking wheel 300, so as to flatten the paper material 20 in the axial direction of the paper taking wheel 300 when the paper material 20 is running, preventing the phenomenon that the paper material 20 is gathered to the middle due to the excessively large running speed in the middle and the excessively small running speed on the two sides, and improving the anti-wrinkling effect of the paper material 20. The second connecting part 432 can be a long shaft structure, which is inserted into the root of the second paper pressing part 431. The second connecting part 432 is distributed and protrudes from the two sides of the second paper pressing part 431 at the two ends in the axial direction, so as to be rotatably inserted into the hook hole of the connecting member 130, and to realize the rotatable connection between the second paper pressing member 430 and the connecting member 130. The reinforcing rib 433 can be a plate structure, which is arranged at the spoon-shaped part of the second paper pressing part 431. On the one hand, the reinforcing rib 433 can strengthen the overall rigidity of the second paper pressing part 431, and prolong the service life. On the other hand, the reinforcing rib 433 can increase the overall weight of the second paper pressing member 430, increase the flattening effect on the paper material 20, and improve the running smoothness. The second paper pressing member 430 provided in this example uses its own gravity as the pressing force for flattening the paper material 20, has a lower requirement for the assembly connection on the side of the first shell 100, has a lower requirement for the processing of the paper feeding device, and has a low production cost.

[0050] As shown in the figure, Figure 6 In a possible implementation, the paper pressing assembly 400 further includes a limiting member 440, which is arranged in the first shell 100 and located at the inner side of the connecting member 130. The side of the second paper pressing member 430 facing the first shell 100 can be pressed against the limiting member 440.

[0051] In this embodiment, the specific configuration of the paper pressing assembly 400 is further optimized. Specifically, the paper pressing assembly 400 is configured as a combined member including at least the second paper pressing piece 430 and the limiting piece 440, which can be a limiting tab and can be connected to the outer wall of the first housing 100 by welding or the like, used to abut against the second paper pressing piece 430 and make the lowest end of the second paper pressing piece 430 located at the required paper pressing height position, thereby achieving the avoidance of paper materials 20 not exceeding the paper pressing height and improving the paper feeding efficiency. When the paper pressing assembly 400 is in a natural state, the back of the second paper pressing piece 430 presses the limiting piece 440, and the lowest point of the second paper pressing piece 430 is located at the paper pressing height position. At this time, the second paper pressing piece 430 does not have force contact with the paper material 20. When the paper pressing assembly 400 is in a pressing state, the second paper pressing piece 430 has force contact with the paper material 20 and is lifted upward by the paper material 20. At this time, the second paper pressing piece 430 is released from the force constraint of the limiting piece 440. The paper pressing assembly 400 provided in this example can satisfy the avoidance and pressing of paper materials 20 of different thicknesses, has a wider application range, and has stronger universality.

[0052] In a possible implementation, the length of the limiting piece 440 in the paper feeding direction X is adjustable. In this way, the transverse length of the limiting piece 440 can be flexibly adjusted, the contact position of the limiting piece 440 and the second paper pressing piece 430 can be adjusted, the second paper pressing piece 430 can be limited to abut at different paper pressing heights, the requirements of different models of paper feeding devices for the thickness of the paper material in the paper feeding tray 10 can be met, the application range of the paper pressing assembly 400 is improved, and the universality is stronger.

[0053] In an example, the limiting piece 440 can be a telescopic piece structure including an outer limiting piece and an inner limiting piece. The inner limiting piece is movably inserted into one end of the outer limiting piece and can be accommodated in the outer limiting piece or completely or partially extended out of the outer limiting piece. One end of the outer limiting piece can be fixedly connected to the outer wall of the first housing 100 by welding or the like, and the other end movably inserts the inner limiting piece. In this way, the transverse length of the limiting piece 440 can be adjusted by adjusting the pulling-out distance of the inner limiting piece, thereby adjusting the paper pressing height of the second paper pressing piece 430 to meet different models of paper feeding devices.

[0054] As Figure 2 and Figure 6As shown in the possible implementation, the paper pressing assembly 400 further comprises a chamfer structure 450 arranged at the abutting position of the paper pressing assembly 400 and the paper 20. In this way, the paper 20 can be prevented from being scratched or damaged when pressed by the paper pressing assembly 400, the protection of the paper 20 is enhanced, and the paper feeding effect is improved. In addition, the arc-shaped chamfer structure 450 can also increase the contact area between the paper pressing assembly 400 and the paper 20, increase the friction therebetween, slow down the paper feeding speed of the paper 20 into the paper taking wheel 300, further prevent the paper 20 from having different paper feeding speeds in the axial direction of the paper taking wheel 300, and improve the anti-wrinkling effect of the paper 20.

[0055] As shown in the possible implementation, Figure 1 , Figure 2 , Figure 5 and Figure 6 , the paper feeding device further comprises a paper separating wheel 500 arranged in the first housing 100 and a friction wheel 600 arranged in the second housing 200 corresponding to the paper separating wheel 500, and the paper taking wheel 300 and the paper separating wheel 500 are sequentially arranged along the paper feeding direction X.

[0056] In this embodiment, the specific configuration of the paper feeding device is further optimized. Specifically, the paper feeding device is configured as a combined component comprising at least the first housing 100, the second housing 200, the paper taking wheel 300, the paper pressing assembly 400, the paper separating wheel 500 and the friction wheel 600. The paper separating wheel 500 and the friction wheel 600 are arranged opposite to each other and used in cooperation to sequentially separate and feed out the paper 20 pushed by the paper taking wheel 300, so as to realize the image scanning or copying of single paper 20. The paper pressing assembly 400, the paper taking wheel 300, the paper separating wheel 500 and the friction wheel 600 are sequentially arranged along the paper feeding direction of the paper 20. The paper 20 in the paper feeding tray 10 is first pressed and flattened by the paper pressing assembly 400, and then enters the paper feeding channel corresponding to the paper taking wheel 300. At this time, there is a case that multiple papers 20 are pushed together to the paper separating wheel 500. The paper separating wheel 500 and the friction wheel 600 can allow single paper 20 to pass through and feed the single paper 20 into the paper scanning or copying channel, so as to sequentially separate and feed out the multiple papers 20. The paper feeding device provided in this example can prevent the paper 20 from being wrinkled during the paper feeding process, and the paper feeding is smooth, the paper feeding efficiency is high, and the user experience is good.

[0057] In addition, the embodiment of the present application also provides an image forming device, comprising an image forming part and the paper feeding device as described above, the image forming part being used for forming an image on the paper 20 conveyed by the paper feeding device. The specific structure of the paper feeding device is referred to the above embodiment, and since the image forming device adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The image forming device provided in the example can be a scanner, a photocopier, a printer, a copier, etc., and is not limited here.

[0058] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like are to be construed to be inclusive (i.e., to include both instances of open ended terms and instances of terms limiting to just the enumerated instances) unless otherwise indicated herein with the singular, dual or plurality forms or language hereof. The use herein of "including", "comprising", "having" and "with" and variations thereof is meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0059] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and the like are used herein to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.

[0060] The above description is merely that of the specific embodiments of the present application, enabling a person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A paper feeding device, characterized in that, include: First shell (100); The second housing (200) is located below the first housing (100); A paper-taking roller (300) is disposed in the first housing (100) and located above the paper feed tray (10) of the paper feeding device. The paper-taking roller (300) uses friction to push the paper (20) in the paper feed tray (10) in the paper feed direction (X). as well as A paper pressing assembly (400) is movably disposed in the first housing (100). When the thickness of the paper (20) in the paper feed tray (10) is greater than the pressing height of the paper pressing assembly (400), the paper pressing assembly (400) can press the paper (20) into the paper take-up roller (300) downward.

2. The paper feeding device according to claim 1, characterized in that, The paper pressing assembly (400) includes a first paper pressing member (410) and an elastic member (420), wherein the first paper pressing member (410) is movably connected to the first housing (100) through the elastic member (420).

3. The paper feeding device according to claim 2, characterized in that, The first paper pressing member (410) includes a first paper pressing part (411) and a first connecting part (412) connected together. The first paper pressing part (411) is connected to the first housing (100) through the first connecting part (412). The first paper pressing part (411) extends out of the first housing (100) and extends toward the paper feed tray (10). The elastic member (420) is disposed between the first connecting part (412) and the inner wall of the first housing (100).

4. The paper feeding device according to claim 3, characterized in that, The first housing (100) includes an outer shell (110) and an inner frame (120). The outer shell (110) covers the outside of the inner frame (120). The inner frame (120) is provided with a movable channel. The bottom wall of the movable channel extends inward to form a limiting part (121). The first connecting part (412) is engaged with the limiting part (121). The elastic member (420) is disposed between the first connecting part (412) and the outer shell (110) and is located in the movable channel.

5. The paper feeding device according to claim 1, characterized in that, The first housing (100) is provided with a connector (130), the connector (130) is located above the paper feed tray (10), and the paper pressing assembly (400) includes a second paper pressing member (430), the second paper pressing member (430) is rotatably connected to the connector (130).

6. The paper feeding device according to claim 5, characterized in that, The second paper pressing member (430) includes a second paper pressing part (431), a second connecting part (432), and a reinforcing rib (433). The second connecting part (432) is located on the outside of the second paper pressing part (431). The second paper pressing part (431) is rotatably connected to the connector (130) through the second connecting part (432). The reinforcing rib (433) is located on the side of the second paper pressing part (431) away from the paper feed tray (10).

7. The paper feeding device according to claim 5, characterized in that, The paper pressing assembly (400) further includes a limiting member (440), which is disposed in the first housing (100) and located inside the connector (130). The side of the second paper pressing member (430) facing the first housing (100) can press against the limiting member (440).

8. The paper feeding device according to claim 7, characterized in that, The length of the limiting member (440) in the paper feeding direction (X) is adjustable.

9. The paper feeding device according to claim 1, characterized in that, The paper pressing assembly (400) further includes a chamfered structure (450) located at the contact point between the paper pressing assembly (400) and the paper (20); and / or, It also includes a paper separating wheel (500) and a friction wheel (600). The paper separating wheel (500) is located in the first housing (100), and the friction wheel (600) is located in the second housing (200) corresponding to the paper separating wheel (500). The paper picking wheel (300) and the paper separating wheel (500) are arranged sequentially along the paper feeding direction (X).

10. An image forming apparatus, characterized in that, It includes an image forming unit and a paper feeding device as described in any one of claims 1 to 9, wherein the image forming unit is used to form an image on the paper (20) conveyed by the paper feeding device.

Images