Automatic paper feeding scanning device

Abstract

The utility model provides an automatic paper feeding scanning device which comprises a support, a wheel assembly, a paper pressing piece, a paper stopping block and a limiting piece, the support comprises an upper base support and a lower base support, and the lower base support is provided with a cover plate; the wheel assembly comprises a paper taking wheel and a paper separating wheel which are arranged in the paper conveying direction so as to convey paper. The paper pressing piece is arranged on the upper base support and provided with a first end and a second end, the first end is rotationally connected with the support, and the second end can be close to or away from the paper taking wheel in the rotating process; the paper stopping block is rotationally connected with the cover plate of the lower base support, and the paper stopping block can rotate out of or rotate into the space between the paper taking wheel and the paper separating wheel; the limiting piece is arranged at the second end, and when the number of the paper is smaller than a preset value, the limiting piece is used for being matched with the paper stopping block so that a preset gap can be formed between the second end and the paper taking wheel, even if the number of the paper is smaller than the preset value, the paper can be smoothly put in, and paper wrinkles caused when the number of the paper is too small and the paper is ultra-thin are avoided; and therefore, the smoothness of paper feeding is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to an automatic paper feeding and scanning device. BACKGROUND

[0002] The automatic paper feeding and scanning device realizes the functions of paper taking and paper separating through a wheel assembly, which comprises a paper taking wheel and a paper separating wheel. A paper pressing part is arranged above the paper taking wheel. During operation, the paper taking wheel rotates and a small stack of paper is taken out from a paper stack by the friction force under the cooperation of the paper pressing part and then is transmitted to the paper separating wheel. The paper separating wheel module separates the paper and transmits one paper to move forward. However, when the number of papers is small or the papers are ultra-thin, the papers are easily subjected to excessive extrusion during the process of being put in due to the abutment between the paper pressing part and the paper taking wheel, so that wrinkles are generated, which affects the smooth transmission of the papers and reduces the smoothness of the paper transmission. CONTENT OF THE UTILITY MODEL

[0003] The present application discloses an automatic paper feeding and scanning device, which can ensure the smoothness of the paper transmission.

[0004] In order to achieve the above-mentioned purpose, the present application discloses an automatic paper feeding and scanning device, which comprises:

[0005] A support, which comprises an upper base support and a lower base support, and the lower base support is provided with a cover plate;

[0006] A wheel assembly, which comprises a paper taking wheel and a paper separating wheel arranged along the paper transmission direction, and the paper taking wheel and the paper separating wheel are arranged in sequence and at intervals to transmit the paper;

[0007] A paper pressing part, which is arranged on the upper base support, and the paper pressing part is provided with a first end and a second end, the first end is rotationally connected with the support, and the second end can approach or move away from the paper taking wheel during rotation;

[0008] A paper blocking block, which is rotationally connected with the cover plate of the lower base support, and the paper blocking block can rotate out of or into the space between the paper taking wheel and the paper separating wheel, and the rotation axis of the paper blocking block is parallel to the rotation axis of the paper taking wheel;

[0009] A limiting part, which is arranged on the second end, and when the number of the papers is less than a preset value, the limiting part is used to cooperate with the paper blocking block to make the second end and the paper taking wheel have a preset gap.

[0010] Optionally, the paper pressing part comprises a paper pressing wheel, which is rotationally arranged on the second end, and the rotation axis of the paper pressing wheel is parallel to the rotation axis of the paper taking wheel.

[0011] The limiting piece is fixedly connected with the paper pressing wheel, a reset piece is arranged between the limiting piece and the second end, and when the paper block is turned out of the paper taking wheel and the paper separating wheel, the reset piece is used for applying an elastic force to the limiting piece away from the rotation of the paper block.

[0012] The second end is provided with a stop structure for preventing the limiting piece from rotating away from the paper block.

[0013] Optionally, the reset piece is a torsion spring sleeved on the paper pressing wheel.

[0014] The second end is provided with a first fixing hole, one end of the torsion spring is inserted into the first fixing hole, the limiting piece is provided with a fixing lug, the fixing lug is provided with a second fixing hole, and the other end of the torsion spring is inserted into the second fixing hole.

[0015] Optionally, the stop structure comprises a first stop portion and a second stop portion, the first stop portion is arranged on the second end, the second stop portion is arranged on the paper pressing wheel, and the first stop portion and the second stop portion are in stop cooperation to prevent the limiting piece from rotating away from the paper block.

[0016] Optionally, the stop structure comprises a third stop portion arranged on the paper pressing wheel, and the third stop portion and the first stop portion are in stop cooperation to avoid interference between the limiting piece and the upper base support.

[0017] Optionally, the limiting piece comprises a limiting portion and a connecting portion connected with each other, the connecting portion is fixedly connected with the paper pressing wheel, and the limiting portion extends along the radial direction of the paper pressing wheel.

[0018] Optionally, along the rotation axis of the paper pressing wheel, the width of the limiting portion is greater than the width of the connecting portion.

[0019] Optionally, the distance of the preset gap is 0.5mm-1.5mm.

[0020] Optionally, the paper block is provided with a limiting boss in stop cooperation with the limiting piece.

[0021] Optionally, the height of the limiting boss is 1mm-1.5mm.

[0022] Compared with the prior art, the application has the beneficial effects that:

[0023] When the paper is placed into the automatic paper feeding scanning device, the paper block is located between the value wheel and the paper separating wheel, so that the paper is kept in the correct position before being transmitted, the paper is aligned, the paper is ensured to enter the scanning device in the correct position and direction, and the limiting piece arranged at the second end of the paper pressing piece cooperates with the paper block, so that there is a preset gap between the second end of the paper pressing piece and the paper wheel, space is provided for placing the paper, even if the number of papers is less than the preset value, the paper can be smoothly placed into the device, so as to avoid the paper from being wrinkled due to too few papers and too thin paper, and the smoothness of the paper feeding is ensured.

[0024] After the paper is placed, the operator presses the start button, the paper wheel starts to rotate, the paper block is turned out of the paper wheel and the paper separating wheel, the second end of the paper pressing piece is pressed on the paper, the paper wheel pushes a small stack of paper to the direction of the paper separating wheel through the friction with the paper, the paper separating wheel is arranged behind the paper wheel in the direction of the paper transmission, the paper separating wheel and the paper separating resistance wheel pressed on the paper separating wheel together form a paper separating wheel module, the paper separating wheel module separates and transmits a paper to enter the camera system for continuous shooting (scanning), the paper pressing piece is arranged on the upper base support, the first end thereof is rotationally connected with the support, in the normal working state, when the paper passes through the paper wheel, the second end of the paper pressing piece is close to the paper wheel, a certain pressure is applied to the paper, so as to ensure that there is enough friction between the paper and the paper wheel, thereby ensuring that the paper can be smoothly transmitted. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a schematic view of an automatic paper feeding scanning device provided by the embodiments of the present application;

[0027] Figure 2 is a schematic view of a support of the automatic paper feeding scanning device provided by the embodiments of the present application;

[0028] Figure 3 is a schematic view of the cooperation of the limiting piece and the paper block provided by the embodiments of the present application;

[0029] Figure 4 is a top view of the paper pressing piece when the limiting piece cooperates with the paper block provided by the embodiments of the present application;

[0030] Figure 5 is a schematic view of the paper pressing piece provided by the embodiments of the present application;

[0031] Figure 6 is a schematic view of the paper pressing piece being lifted by paper provided by an embodiment of the present application;

[0032] Figure 7 is a top view of the paper pressing piece being lifted by paper provided by an embodiment of the present application;

[0033] Figure 8 is a schematic view of the stop block provided by an embodiment of the present application.

[0034] Main figure mark explanation

[0035] 1-automatic paper feeding scanning device;

[0036] 100-support; 110-upper base support; 120-cover plate;

[0037] 200-wheel assembly; 210-paper taking wheel; 220-paper separating wheel;

[0038] 300-paper pressing piece; 310-first end; 320-second end; 330-paper pressing wheel; 340-first fixing hole;

[0039] 400-paper stopping block; 410-limiting boss;

[0040] 500-limiting piece; 510-fixing lug; 511-second fixing hole; 520-limiting part; 530-connecting part;

[0041] 600-resetting piece;

[0042] 700-stop structure; 710-first stop part; 720-second stop part; 730-third stop part. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0045] And, the above-mentioned partial terms, in addition to can be used to express the orientation or position relationship, can also be used to express other meanings, for example, the term "upper" can also be used to express a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in this application can be understood according to the specific circumstances.

[0046] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components, and the specific types and structures of which can be the same or different, and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0048] As mentioned in the background, when the number of paper sheets is small, the paper sheets are easily over-pressed during the putting-in process due to the abutment of the paper pressing part and the paper taking wheel, thereby causing wrinkles, which affects the smooth transmission of the paper sheets and reduces the smoothness of the paper transmission.

[0049] In order to solve the above-mentioned problems, the present application provides an automatic paper feeding scanning device. When starting to put paper sheets into the automatic paper feeding scanning device, the paper blocking block is located between the paper taking wheel and the paper separating wheel, so that the paper sheets are kept in the correct position before starting to be transmitted, which facilitates the alignment of the paper sheets and ensures that the paper sheets can enter the scanning device in the correct position and direction. In addition, the limiting piece provided at the second end of the paper pressing part cooperates with the paper blocking block, so that there is a predetermined gap between the second end of the paper pressing part and the paper taking wheel, which provides space for the paper sheets to be placed. Even if the number of paper sheets is less than the predetermined value, the paper sheets can still be smoothly put into the device, so as to avoid wrinkles caused by too few paper sheets and too thin paper sheets, thereby ensuring the smoothness of the paper feeding.

[0050] The technical solutions of the present application will be further described below in combination with specific embodiments and drawings.

[0051] Reference Figure 1 , Figure 2 and Figure 3The embodiment provides an automatic paper feeding scanning device 1, which comprises a support 100, a wheel assembly 200, a paper pressing piece 300, a paper blocking block 400 and a limiting piece 500. The support 100 comprises an upper base support 110 and a lower base support, and the lower base support is provided with a cover plate 120. The wheel assembly 200 comprises a paper taking wheel 210 and a paper separating wheel 220 arranged along the paper transmission direction, and the paper taking wheel 210 and the paper separating wheel 220 are arranged in sequence and at intervals to transmit the paper. The paper pressing piece 300 is arranged on the upper base support 110, and the paper pressing piece 300 is provided with a first end 310 and a second end 320. The first end 310 is rotationally connected with the support 100, and the second end 320 can be close to or away from the paper taking wheel 210 in the rotation process. The paper blocking block 400 is rotationally connected with the cover plate 120 of the lower base support, and the paper blocking block 400 can be rotated out of or into the space between the paper taking wheel 210 and the paper separating wheel 220. The rotation axis of the paper blocking block 400 is parallel to the rotation axis of the paper taking wheel 210. The limiting piece 500 is arranged on the second end 320, and when the number of the paper is less than a preset value, the limiting piece 500 is used in cooperation with the paper blocking block 400 to make the second end 320 and the paper taking wheel 210 have a preset gap.

[0052] The preset value in the "the number of the paper is less than a preset value" should be understood as a critical value of the number of the paper, which is related to the thickness of the paper and is a balance point for ensuring the paper feeding effect and the performance of the device. The preset gap should be understood as a minimum safety distance which can ensure that the paper can smoothly pass through the area between the paper taking wheel 210 and the paper pressing piece 300. When the number of the paper is small, the thickness of the paper itself is relatively thin. If the distance between the paper pressing piece 300 and the paper taking wheel 210 is too small, the paper may be subjected to excessive pressure, thereby affecting the normal transmission of the paper, and even the paper may be stuck or damaged in the transmission process. The existence of the preset gap can ensure that the paper has enough space in the transmission process, so that it can smoothly move forward under the driving of the paper taking wheel 210, avoiding the transmission obstacles caused by insufficient space.

[0053] When the paper is started to be placed into the automatic paper feeding scanning device 1, the paper blocking block 400 is located between the paper taking wheel and the paper separating wheel 220, so that the paper can be kept in the correct position before starting to be transmitted, facilitating the alignment of the paper, ensuring that the paper can enter the scanning device in the correct position and direction, and the limiting piece 500 arranged on the second end 320 of the paper pressing piece 300 cooperates with the paper blocking block 400, so that the second end 320 of the paper pressing piece 300 and the paper taking wheel 210 have a preset gap, providing space for the placement of the paper. Even if the number of the paper is less than the preset value, the paper can also be smoothly placed, so as to avoid the paper from being wrinkled due to too small number of the paper, thereby ensuring the smoothness of the paper feeding.

[0054] After the paper is placed, the operator presses the start button, and the paper taking wheel 210 starts to rotate. At the same time, the paper blocking block 400 rotates out of the space between the paper taking wheel 210 and the paper separating wheel 220. The second end 320 of the paper pressing member 300 presses on the paper. The paper taking wheel 210 transmits a small stack of paper to the paper separating wheel 220 through the friction with the paper. The paper separating wheel 220 is arranged behind the paper taking wheel 210 along the transmission direction of the paper. The paper separating wheel 220 and the paper separating resistance wheel arranged above the paper separating wheel 220 together form a paper separating wheel module. The paper separating wheel module separates and transmits the paper to the camera system for continuous shooting (scanning). (The paper separating wheel 220 and the paper separating resistance wheel arranged above the paper separating wheel 220 together form a paper separating wheel module, which is a common knowledge in the field, and will not be described here.) The paper pressing member 300 is arranged on the upper base support 110. The first end 310 of the paper pressing member 300 is rotationally connected with the support 100. In the normal working state, when the paper passes through the paper taking wheel 210, the second end 320 of the paper pressing member 300 is close to the paper taking wheel 210, and a certain pressure is applied to the paper to ensure that there is enough friction between the paper and the paper taking wheel 210, so that the paper can be smoothly transmitted.

[0055] For example, a transmission structure is arranged between the paper taking wheel 210 and the paper blocking block 400. An induction device is arranged at the paper inlet of the automatic paper walking scanning device 1. When the operator puts the paper into the automatic paper walking scanning device 1 through the paper inlet, the induction device senses the paper entering. At this time, the induction device transmits a signal to the driving structure connected with the paper taking wheel 210, and drives the paper taking wheel to rotate clockwise to drive the paper blocking block 400 to rotate into the space between the paper taking wheel 210 and the paper separating wheel 220, so as to stop the paper in the transmission direction. After the operator completely places the paper in the automatic paper walking scanning device 1, the operator presses the start button of the automatic paper walking scanning device 1. At this time, the driving structure connected with the paper taking wheel 210 drives the paper taking wheel 210 to rotate counterclockwise to drive the paper blocking block 400 to rotate out of the space between the paper taking wheel 210 and the paper separating wheel 220, so that the paper can be transmitted in the transmission direction under the driving of the paper taking wheel 210.

[0056] In a possible embodiment, referring to Figure 3 and Figure 4 The paper pressing member 300 includes a paper pressing wheel 330 rotationally arranged at the second end 320. The rotation axis of the paper pressing wheel 330 is parallel to the rotation axis of the paper taking wheel 210. The limiting member 500 is fixedly connected with the paper pressing wheel 330. The limiting member 500 and the second end 320 are provided with a reset member 600. When the paper blocking block 400 rotates out of the space between the paper taking wheel 210 and the paper separating wheel 220, the reset member 600 is used to apply an elastic force to the limiting member 500 away from the rotation direction of the paper blocking block 400. The second end 320 is provided with a stop structure 700 for preventing the limiting member 500 from rotating away from the paper blocking block 400.

[0057] When the limiting member 500 cooperates with the paper blocking block 400 to form a preset gap, the reset member 600 can apply an elastic force to the limiting member 500 away from the blocking block, at the same time, the stop structure 700 can prevent the limiting member 500 from excessively rotating away from the paper blocking block 400, and set a clear boundary for the rotation of the limiting member 500. Under the synergistic action of the two, the limiting member 500 can be accurately limited to a specific position, which makes the limiting member 500 not only realize stable blocking cooperation with the paper blocking block 400, but also effectively prevent the second end 320 of the paper pressing roller from rotating relative to the limiting member 500. When the paper blocking block 400 rotates out of the paper taking wheel 210 and the paper separating wheel 220, the limiting member 500 loses the support of the paper blocking member in an instant. At this time, the elastic force of the reset member 600 continues to act, so that the limiting member 500 still maintains the state when it cooperates with the paper blocking block 400, avoiding various obstructions to paper feeding caused by uncontrolled rotation of the limiting member 500, such as preventing the limiting member 500 from interfering with other components after rotating, or changing the originally stable paper feeding channel structure, thereby ensuring that the paper can continue to pass through the paper taking wheel 210 and the paper separating wheel 220 smoothly in a stable environment, maintaining the continuity and stability of the entire automatic paper feeding and scanning device 1 during the paper feeding process, and improving the reliability and working efficiency of the device.

[0058] In a possible embodiment, referring to Figure 4 and Figure 5 , the reset member 600 is a torsion spring sleeved on the paper pressing roller 330; the second end 320 is provided with a first fixed hole 340, one end of the torsion spring is inserted into the first fixed hole 340, the limiting member 500 is provided with a fixed lug 510, the fixed lug 510 is provided with a second fixed hole 511, and the other end of the torsion spring is inserted into the second fixed hole 511.

[0059] The torsion spring can accurately transmit the elastic force to the limiting member 500 by being fixed at the second end 320 of the paper pressing member 300 and the fixed lug 510 of the limiting member 500 respectively, and can accurately control the position of the limiting member 500, thereby ensuring the accuracy of the preset gap between the paper pressing roller 330 and the paper taking wheel 210. Moreover, the design of sleeving the torsion spring on the paper pressing roller 330 fully utilizes the space around the paper pressing roller 330, so that the structure of the entire device is more compact.

[0060] Of course, the reset member 600 is not limited to the above form, for example, the reset member 600 can also be a compression spring, which can be installed between the limiting member 500 and the second end 320. When the limiting member 500 is subjected to an external force, the compression spring will be further compressed, and the compression spring generates an elastic force through its compression deformation, which is opposite to the direction of the external force acting on the limiting member 500, so as to prevent excessive displacement of the limiting member 500.

[0061] In a possible embodiment, referring to Figure 3 , Figure 4 and Figure 5 , the stop structure 700 comprises a first stop portion 710 and a second stop portion 720, the first stop portion 710 is arranged on the second end 320, and the second stop portion 720 is arranged on the paper pressing wheel 330, the first stop portion 710 and the second stop portion 720 are in stop cooperation to prevent the limiting member 500 from rotating away from the paper block 400.

[0062] The first stop portion 710 is arranged on the second end 320 of the paper pressing member 300, and the second stop portion 720 is arranged on the paper pressing wheel 330, and the two are in stop cooperation, which can accurately limit the rotation range of the limiting member 500 away from the paper block 400, and ensure that the limiting member 500 can be kept within the predetermined position interval in various working states, so as to ensure that the distance between the paper pressing wheel 330 and the paper taking wheel 210 is always within a suitable range, which is conducive to maintaining a stable paper running state, improving the accuracy and reliability of paper running, and the stop structure 700 cooperates with the reset member 600, so that the limiting member 500 can move within a safe and stable range when subjected to the elastic force of the reset member 600, which not only ensures the effective realization of the reset function, but also prevents problems that may be caused by excessive movement of the limiting member 500, further optimizes the performance of the device, and improves the stability and controllability of the paper running process.

[0063] In a possible embodiment, referring to Figure 6 and Figure 7 , the stop structure 700 comprises a third stop portion 730 arranged on the paper pressing wheel 330, and the third stop portion 730 is in stop cooperation with the first stop portion 710 to avoid interference between the limiting member 500 and the upper base support 110.

[0064] If the number of paper sheets exceeds the preset value and is much larger than the preset value, the paper pressing wheel 330 is lifted by the paper sheets, at this time, the limiting member 500 is rotated downward under the action of other components in front of the transmission direction, and due to the stop cooperation between the third stop portion 730 and the first stop portion 710, the rotation range of the limiting member 500 is limited, which can avoid excessive rotation of the limiting member 500, thereby preventing the limiting member 500 from pushing the paper sheets out of the automatic paper running and scanning device 1 in the direction opposite to the transmission direction, or interfering with the upper base support 110.

[0065] For example, as shown in FIG. 3 and Figure 6When the limiting member 500 cooperates with the paper blocking block 400 to form the preset gap, the resetting member 600 applies a force to the limiting member 500, which can make the limiting member 500 rotate clockwise around the second end 320, and at this time, the stop structure 700 limits the rotation of the limiting member 500 relative to the second end 320. When the paper starts to be transported, the paper blocking block 400 exits between the paper taking wheel 210 and the paper separating wheel 220. Due to the existence of the resetting member 600, the limiting member 500 has a tendency to rotate clockwise around the second end 320, and the cooperation of the first stop portion 710 and the second stop portion 720 can prevent the rotation of the limiting member 500, so that the limiting member 500 can still maintain the state when it cooperates with the paper blocking block 400, thereby preventing the limiting member 500 from being blocked after rotating around the second end 320 after losing the support of the paper blocking block 400.

[0066] When the number of paper sheets is large, the paper pressing wheel 330 is lifted by the paper sheets, at this time, the limiting member 500 rotates counterclockwise around the second end 320 under the pressure of other components in front of the transmission direction. Due to the cooperation of the third stop portion 730 and the first stop portion 710, the rotation of the limiting member 500 can be prevented, so as to limit the limiting member 500 in the appropriate position, avoiding the interference of the limiting member 500 with the automatic paper feeding and scanning device 1 or pushing the paper out of the automatic paper feeding and scanning device 1 in the direction opposite to the transmission direction.

[0067] In a possible embodiment, referring to Figure 5 , the limiting member 500 comprises a limiting portion 520 and a connecting portion 530 connected with each other, the connecting portion 530 is fixedly connected with the paper pressing wheel 330, and the limiting portion 520 extends along the radial direction of the paper pressing wheel 330.

[0068] The limiting portion 520 extends along the radial direction of the paper pressing wheel 330 and cooperates with the connecting portion 530 to accurately control the distance between the paper pressing wheel 330 and the paper taking wheel 210. During the operation of the automatic paper feeding and scanning device 1, the distance between the paper pressing wheel 330 and the paper taking wheel 210 is accurately adjusted and maintained through the cooperation of the limiting portion 520 and the paper blocking block 400, so as to ensure that the paper can be subjected to appropriate pressure during the transmission process, thereby ensuring the smoothness and stability of the paper feeding, improving the accuracy and quality of the scanning, and realizing the effective control of the distance between the paper pressing wheel 330 and the paper taking wheel 210 without occupying too much additional space, thereby improving the utilization rate of the internal space of the automatic paper feeding and scanning device 1.

[0069] In a possible embodiment, referring to Figure 5 , along the rotation axis of the paper pressing wheel 330, the width of the limiting portion 520 is greater than the width of the connecting portion 530.

[0070] The wider design of the limiting part 520 can provide a larger contact area and stronger blocking force when cooperating with the paper blocking block 400, so as to more effectively limit the rotation range of the limiting part 500, and ensure that the limiting part 500 can be stably kept at the predetermined position in various working states, especially when the number of paper sheets changes or abnormal situations occur, thereby enhancing the limiting stability of the entire paper conveying system and reducing the paper conveying problems caused by inaccurate limiting.

[0071] In a possible embodiment, the distance of the preset gap is 0.5 mm-1.5 mm.

[0072] When the number of paper sheets is small, the gap can prevent the paper pressing wheel 330 from exerting excessive pressure on the paper sheets, thereby effectively avoiding wrinkles on the paper sheets caused by excessive extrusion. The reduction of wrinkles not only makes the paper sheets pass through the paper conveying passage more smoothly and reduces the risk of paper jam, but also ensures the integrity and quality of the scanned image and avoids the situation that the scanned content is missing or unclear due to wrinkles on the paper sheets.

[0073] In a possible embodiment, referring to Figure 8 , the paper blocking block 400 is provided with a limiting boss 410 cooperating with the limiting part 500.

[0074] The limiting boss 410 cooperates with the limiting part 500 to achieve accurate control of the position of the limiting part 500, so as to ensure that the limiting part 500 can be accurately positioned in different working states, thereby keeping the distance between the paper pressing wheel 330 and the paper taking wheel 210 within the optimal range at all times and improving the accuracy and stability of paper conveying.

[0075] In a possible embodiment, the height of the limiting boss 410 is 1 mm-1.5 mm.

[0076] The height range of 1 mm-1.5 mm can provide an accurate stop position for the limiting part 500, ensure the position accuracy of the limiting part 500 when cooperating with the paper blocking block 400, thereby ensuring that the paper sheets are subjected to uniform and stable pressure during the conveying process, improving the stability of paper conveying, reducing problems such as shaking and deviation of the paper sheets during the conveying process, and ensuring that the paper sheets can enter the scanning area with accurate position and posture.

[0077] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the automatic paper conveying scanning device of the present application, and not to limit them; although the automatic paper conveying scanning device of the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic paper feeding and scanning device (1), characterized in that, The automatic paper feeding and scanning device (1) includes: A bracket (100) comprising an upper base bracket (110) and a lower base bracket, the lower base bracket having a cover plate (120); A wheel assembly (200) includes a paper-taking wheel (210) and a paper-separating wheel (220) arranged along the paper transport direction. The paper-taking wheel (210) and the paper-separating wheel (220) are arranged alternately to transport the paper. A paper pressing component (300) is disposed on the upper base support (110). The paper pressing component (300) has a first end (310) and a second end (320). The first end (310) is rotatably connected to the support (100), and the second end (320) can move closer to or further away from the paper picking wheel (210) during rotation. A paper stop block (400) is rotatably connected to the cover plate (120) of the lower base bracket. The paper stop block (400) can rotate out or into the paper picking wheel (210) and the paper separating wheel (220). The rotation axis of the paper stop block (400) is parallel to the rotation axis of the paper picking wheel (210). A limiting member (500) is provided at the second end (320). When the number of papers is less than a preset value, the limiting member (500) is used to cooperate with the paper stop block (400) so that there is a preset gap between the second end (320) and the paper picking wheel (210).

2. The automatic paper feeding and scanning device (1) according to claim 1, characterized in that, The paper pressing component (300) includes a paper pressing wheel (330), which is rotatably disposed at the second end (320), and the rotation axis of the paper pressing wheel (330) is parallel to the rotation axis of the paper taking wheel (210); The limiting member (500) is fixedly connected to the paper pressing wheel (330), and a reset member (600) is provided between the limiting member (500) and the second end (320). When the paper stop block (400) rotates out between the paper taking wheel (210) and the paper separating wheel (220), the reset member (600) is used to apply an elastic force to the limiting member (500) to rotate away from the paper stop block (400). The second end (320) is provided with a stop structure (700), which is used to prevent the limiting member (500) from rotating away from the paper stop block (400).

3. The automatic paper feeding and scanning device (1) according to claim 2, characterized in that, The reset component (600) is a torsion spring sleeved on the paper pressing wheel (330); The second end (320) is provided with a first fixing hole (340), one end of the torsion spring is inserted into the first fixing hole (340), the limiting member (500) is provided with a fixing ear (510), the fixing ear (510) is provided with a second fixing hole (511), and the other end of the torsion spring is inserted into the second fixing hole (511).

4. The automatic paper feeding and scanning device (1) according to claim 2, characterized in that, The stop structure (700) includes a first stop part (710) and a second stop part (720). The first stop part (710) is disposed at the second end (320), and the second stop part (720) is disposed on the paper pressure roller (330). The first stop part (710) and the second stop part (720) cooperate to prevent the limiting member (500) from rotating away from the paper stop block (400).

5. The automatic paper feeding and scanning device (1) according to claim 4, characterized in that, The stop structure (700) includes a third stop portion (730) disposed on the paper pressing roller (330), the third stop portion (730) being in a stop-fitting relationship with the first stop portion (710) to avoid interference between the limiting member (500) and the upper base support (110).

6. The automatic paper feeding and scanning device (1) according to claim 2, characterized in that, The limiting member (500) includes a limiting part (520) and a connecting part (530) connected to each other. The connecting part (530) is fixedly connected to the paper pressing wheel (330), and the limiting part (520) extends radially along the paper pressing wheel (330).

7. The automatic paper feeding and scanning device (1) according to claim 6, characterized in that, Along the rotation axis of the paper pressing roller (330), the width of the limiting part (520) is greater than the width of the connecting part (530).

8. The automatic paper feeding and scanning device (1) according to claim 1, characterized in that, The preset gap is 0.5mm-1.5mm.

9. The automatic paper feeding and scanning device (1) according to claim 1, characterized in that, The paper stop block (400) is provided with a limiting boss (410) that cooperates with the limiting member (500) to stop.

10. The automatic paper feeding and scanning device (1) according to claim 9, characterized in that, The height of the limiting boss (410) is 1mm-1.5mm.

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