Paper pressing plate assembly, scanning device and image forming equipment

Abstract

The utility model relates to the technical field of image reading equipment, in particular to a paper pressing plate assembly, a scanning device and image forming equipment. The paper pressing plate assembly comprises a paper pressing sheet metal part, the paper pressing sheet metal part comprises a first bottom wall, a plurality of positioning parts are arranged on the first bottom wall, and the positioning parts are located at different positions of the first bottom wall respectively; at least part of the paper pressing background plate is located on one side of the first bottom wall, a plurality of positioning protrusions are arranged on the paper pressing background plate, the positioning protrusions stretch into the positioning parts in a one-to-one correspondence mode, and the paper pressing background plate is fixedly connected with the paper pressing sheet metal part. The mounting process of the paper pressing plate assembly is simple and convenient, and the influence of human factors on the mounting effect can be reduced. After the paper pressing background plate is installed on the paper pressing sheet metal part, wrinkles, deflection or bubbles cannot occur, it is guaranteed that the contact face of the paper pressing background plate and paper is flat, the straightness and planeness of the whole paper pressing plate assembly are good, the paper pressing effect is guaranteed, and then the scanning effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of image reading equipment, and in particular to a paperboard assembly, a scanning device and an image forming device. Background Art

[0002] The multifunctional image forming device with copying and scanning functions has a scanning device, through which the user can scan the content on the paper. The scanning device presses the paper tightly on the light-transmitting manuscript table through a paperboard pressing assembly, so that the image reader can accurately obtain the content on the paper.

[0003] At present, some paperboard pressing components include a paper pressing metal piece and a background Mylar sheet. The background Mylar sheet is glued to the paper pressing metal piece, and the paper pressing metal piece is connected to a pressurizing component of a scanning device. When the scanning device is working, the background Mylar sheet contacts the paper, and the paperboard pressing component presses the paper tightly onto the light-transmitting manuscript table under the action of the pressurizing component.

[0004] However, when the background Mylar sheet is glued to the metal paper pressing part, if the glue is not properly applied, wrinkles or bubbles will easily appear on the background Mylar sheet, which will cause the contact surface between the background Mylar sheet and the paper to be uneven, affecting the scanning effect. If a whole white plastic part is used as a paper pressing board component, the linear deformation degree of the paper pressing board component is poor, and the flatness is not guaranteed, which affects the scanning effect. Utility Model Content

[0005] Based on this, the present application provides a paper pressing board assembly, a scanning device and an image forming device to solve the problem in the related art that the assembly process of the paper pressing board assembly is complicated and the paper pressing effect is poor.

[0006] In a first aspect, the present application provides a paperboard assembly, comprising:

[0007] A paper pressing sheet metal component, the paper pressing sheet metal component comprises a first bottom wall, a plurality of positioning parts are arranged on the first bottom wall, and the plurality of positioning parts are respectively located at different positions of the first bottom wall;

[0008] The paper pressing background plate is at least partially located on one side of the first bottom wall. A plurality of positioning protrusions are arranged on the paper pressing background plate. Each positioning protrusion extends into each positioning part one by one. The paper pressing background plate is fixedly connected to the paper pressing sheet metal part.

[0009] In a possible implementation, each positioning portion is a positioning hole penetrating through the first bottom wall, each positioning protrusion is a positioning column, and each positioning column passes through each positioning hole in a one-to-one correspondence;

[0010] The positioning column is a plastic part, and the positioning column is fixed to the paper pressing sheet metal part by hot melting.

[0011] In a possible implementation, the positioning portion is a positioning hole provided on the first bottom wall, the positioning protrusion includes a column and a plurality of supporting portions, the plurality of supporting portions are spaced apart along the circumference of the column, and each supporting portion abuts against the hole wall of the positioning hole.

[0012] In a possible implementation, a plurality of latching holes are further provided on the first bottom wall, a plurality of latching members are provided on the paper pressing background plate, and each latching member passes through each latching hole one by one and is latched with the edge of the corresponding latching hole.

[0013] In a possible implementation, at least part of the latching member includes two latches that are spaced apart from each other, and the two latches are respectively engaged with different positions of the edge of the latching hole.

[0014] In a possible implementation, the fastener is engaged with the edge of the fastener hole in the width direction of the paper pressing sheet metal, and the size of the fastener hole in the length direction of the paper pressing sheet metal is larger than the size of the corresponding fastener in the length direction of the paper pressing sheet metal.

[0015] In a possible implementation, there are two positioning portions, the two positioning portions and the plurality of clamping holes are arranged at intervals along the length direction of the paper pressing sheet metal component, and the plurality of clamping holes are located between the two positioning portions.

[0016] In a possible implementation, the paper pressing sheet metal part also includes two first side walls respectively located on opposite sides of the first bottom wall, the paper pressing background plate includes a second bottom wall and two second side walls respectively located on opposite sides of the second bottom wall, the positioning protrusion is arranged on the second bottom wall, the second side wall is located on the outer periphery of the first side wall, and a hook is arranged on the second side wall, which is engaged with a side of the first side wall away from the first bottom wall.

[0017] In a second aspect, the present application provides a scanning device, including an image reader, a light-transmitting manuscript table, a pressure component and the above-mentioned paperboard pressing assembly;

[0018] The image reader and the paper pressing board assembly are respectively located on opposite sides of the light-transmitting manuscript platform, and the pressing component is located on the side of the paper pressing board assembly away from the light-transmitting manuscript platform and is connected to the paper pressing sheet metal part of the paper pressing board assembly.

[0019] In a third aspect, the present application provides an image forming device, comprising the above-mentioned scanning device.

[0020] The present application provides a paperboard assembly, a scanning device and an image forming device, wherein the paperboard assembly comprises a paperboard sheet metal and a paperboard background plate, wherein the paperboard sheet metal ensures the structural strength of the paperboard assembly, so that the paperboard assembly is not easily deformed. The paperboard background plate is used as a background for scanning and reading, and the paperboard background plate is at least partially located on one side of the first bottom wall, and a plurality of positioning protrusions are arranged on the paperboard background plate, and a plurality of positioning parts are arranged on the first bottom wall of the paperboard sheet metal, and the plurality of positioning parts are respectively located at different positions of the first bottom wall. Through the cooperation between the positioning parts and the positioning protrusions, the rapid positioning between the paperboard sheet metal and the paperboard background plate is realized, and the rapid assembly between the paperboard background plate and the paperboard sheet metal is realized, and the paperboard background plate is fixedly connected to the paperboard sheet metal, and the installation process of the paperboard assembly is simple, which can reduce the influence of human factors on the installation effect. After the paperboard background plate is installed on the paperboard sheet metal, wrinkles, skewness or bubbles will not appear, and the contact surface between the paperboard background plate and the paper is guaranteed to be flat, and the straightness and flatness of the entire paperboard assembly are better, which ensures the paper pressing effect, and then ensures the scanning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of a paperboard pressing assembly in the related art;

[0023] Figure 2 It is a structural schematic diagram of another paperboard assembly in the related art;

[0024] Figure 3 A schematic structural diagram of a paper pressing sheet metal component provided in an embodiment of the present application;

[0025] Figure 4 A schematic structural diagram of another paper pressing sheet metal component provided in an embodiment of the present application;

[0026] Figure 5 for Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 6 for Figure 4 A partial enlarged schematic diagram of point C in the middle;

[0028] Figure 7 A schematic diagram of the structure of a scanning device provided in an embodiment of the present application;

[0029] Figure 8A cross-sectional view of a scanning device provided in an embodiment of the present application;

[0030] Fig. 9 for Figure 8 A local enlarged schematic diagram of the middle A;

[0031] Fig.10 A schematic diagram of the structure of an image forming device provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 10- scanning device; 11- image reader; 12- light-transmitting manuscript table; 13- pressurizing component; 14- paperboard assembly; 141- paper pressing metal piece; 142- background plate Mylar sheet;

[0034] 100 - paper pressing sheet metal; 110 - first bottom wall; 111 - positioning portion; 112 - clamping hole; 120 - first side wall;

[0035] 200 - paper pressing background plate; 210 - positioning protrusion; 211 - column; 212 - supporting part; 220 - buckle; 221 - buckle; 230 - hook. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] The terms "first", "second" and "third" (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0041] In the prior art, such as Figure 1 As shown, some paperboard assemblies 14 include a paper pressing metal piece 141 and a background board Mylar sheet 142 (Mylar sheet), the background board Mylar sheet 142 is glued to the paper pressing metal piece 141, and the paper pressing metal piece 141 is connected to the pressure component of the scanning device 10. During the operation of the scanning device 10, the background board Mylar sheet 142 contacts the paper, and the paperboard assemblies 14 press the paper tightly on the light-transmitting manuscript table under the action of the pressure component. However, when the background board Mylar sheet 142 is glued to the paper pressing metal piece 141, if the gluing is not done well, the background board Mylar sheet 142 is prone to skewness, wrinkles or bubbles, which leads to an uneven contact surface between the background board Mylar sheet 142 and the paper, affecting the scanning effect. In addition, the gluing method has a short lifespan, and the gluing effect will gradually decrease after long-term use.

[0042] like Figure 2 As shown, another existing paperboard pressing assembly 14 is a white plastic part as a whole. However, due to the influence of the material, the paperboard pressing assembly 14 has poor linear deformation and unguaranteed flatness, which affects the scanning effect.

[0043] After repeated thinking and verification, the inventor found that if the paper pressing board assembly is composed of a paper pressing sheet metal and a paper pressing background plate, the paper pressing sheet metal has a high structural strength, which can prevent the paper pressing board assembly from being deformed. The paper pressing background plate serves as a scanning background, and the paper pressing background plate and the paper pressing sheet metal can be positioned by the cooperation between the positioning part and the positioning protrusion. At the same time, the paper pressing background plate and the paper pressing sheet metal are fixedly connected. The cooperation between the positioning part and the positioning protrusion enables the paper pressing background plate and the paper pressing sheet metal to be quickly positioned, making the installation process of the paper pressing board assembly simple and reducing the influence of human factors on the installation effect. After the paper pressing background plate is installed on the paper pressing sheet metal, there will be no wrinkles, skewness or bubbles, ensuring that the contact surface between the paper pressing background plate and the paper is flat, and compared with the overall white plastic part, the straightness and flatness of the entire paper pressing board assembly are better, ensuring the paper pressing effect, and then ensuring the scanning effect.

[0044] In view of this, the inventor has designed a paper pressing board assembly, a scanning device and an image forming device. The paper pressing board assembly includes a paper pressing sheet metal and a paper pressing background plate. A plurality of positioning protrusions are arranged on the paper pressing background plate, and a positioning portion cooperating with the positioning protrusions is arranged on the paper pressing sheet metal. The cooperation between the positioning protrusions and the positioning portion can realize the rapid positioning between the paper pressing sheet metal and the paper pressing background plate, thereby improving the assembly efficiency between the paper pressing sheet metal and the paper pressing background plate. The installation process of the paper pressing board assembly is simple, and the influence of human factors on the installation effect can be reduced. After the paper pressing background plate is installed on the paper pressing sheet metal, no wrinkles, skewness or bubbles will appear, thereby ensuring that the contact surface between the paper pressing background plate and the paper is flat, and the straightness and flatness of the paper pressing board assembly are better, thereby ensuring the scanning effect.

[0045] The technical solutions of the paperboard assembly, scanning device and image forming equipment provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0046] Reference Figure 3-Figure 5 As shown, the paper pressing board assembly 14 provided in the embodiment of the present application includes a paper pressing sheet metal part 100 and a paper pressing background plate 200. The paper pressing sheet metal part 100 includes a first bottom wall 110, and a plurality of positioning parts 111 are provided on the first bottom wall 110, and the plurality of positioning parts 111 are respectively located at different positions of the first bottom wall 110. The paper pressing background plate 200 is at least partially located on one side of the first bottom wall 110, and a plurality of positioning protrusions 210 are provided on the paper pressing background plate 200, and each positioning protrusion 210 extends into each positioning part 111 one by one. The paper pressing background plate 200 is fixedly connected to the paper pressing sheet metal part 100.

[0047] Among them, the paper pressing sheet metal part 100 is a strip structure made of sheet metal, and its structural strength is relatively high. The first bottom wall 110 of the paper pressing sheet metal part 100 can be connected to the pressure component. After the paper pressing sheet metal part 100 is connected to the pressure component, the pressure component can apply a force to the paper pressing sheet metal part 100. Exemplarily, the shape of the positioning part 111 can be circular, and the size of multiple positioning parts 111 is the same. This embodiment does not limit the number of positioning parts 111 and the specific position of each positioning part 111 on the first bottom wall 110, and those skilled in the art can set it according to actual needs.

[0048] It can be understood that the paper pressing background plate 200 can be used as a background for scanning and reading, and the paper pressing background plate 200 is at least partially located on the side of the first bottom wall 110 facing the paper. Exemplarily, the color of the paper pressing background plate 200 can be pure white, and the paper pressing background plate 200 can be made of white plastic. The present embodiment does not limit the color of the paper pressing background plate 200, and those skilled in the art can set it as needed. The number of positioning protrusions 210 on the paper pressing background plate 200 is the same as the number of positioning parts 111 on the paper pressing sheet metal part 100, and the positions of the multiple positioning protrusions 210 and the multiple positioning parts 111 correspond one by one, and each positioning protrusion 210 can be set on the paper pressing background plate 200 by an integrated molding process.

[0049] It is worth mentioning that when the positioning protrusion 210 extends into the positioning portion 111, the positioning portion 111 can limit the positioning protrusion 210. The cooperation between the positioning protrusion 210 and the positioning portion 111 can prevent the paper pressing background plate 200 from moving relative to the paper pressing sheet metal 100 in a direction parallel to the first bottom wall 110, and prevent the paper pressing background plate 200 from being skewed relative to the paper pressing sheet metal 100. In addition, the cooperation between the positioning protrusion 210 and the positioning portion 111 can also prevent the paper pressing background plate 200 from being deformed, and then the paper pressing background plate 200 will not have wrinkles or bubbles after being installed on the paper pressing sheet metal 100.

[0050] In a possible implementation, the positioning protrusion 210 includes a fixed end and a free end that are arranged opposite to each other, and the fixed end of the positioning protrusion 210 is connected to the main part of the paper pressing background plate 200. A guide section can be provided at the free end of the positioning protrusion 210, and the cross-sectional dimension of the guide section gradually increases from the free end toward the fixed end, so that the staff can easily extend the positioning protrusion 210 into the corresponding positioning portion 111 through the guide section. In this way, the positioning efficiency between the paper pressing sheet metal 100 and the paper pressing background plate 200 is improved, thereby further improving the assembly efficiency between the paper pressing sheet metal 100 and the paper pressing background plate 200.

[0051] The paper pressing board assembly 14 provided in this embodiment includes a paper pressing sheet metal part 100 and a paper pressing background plate 200. The paper pressing sheet metal part 100 ensures the structural strength of the paper pressing board assembly 14, so that the paper pressing board assembly 14 is not easily deformed. The paper pressing background plate 200 is used as a background for scanning and reading. The paper pressing background plate 200 is at least partially located on one side of the first bottom wall 110. A plurality of positioning protrusions 210 are provided on the paper pressing background plate 200. A plurality of positioning parts 111 are provided on the first bottom wall 110 of the paper pressing sheet metal part 100, and the plurality of positioning parts 111 are respectively located at different positions of the first bottom wall 110. Through the cooperation between the positioning parts 111 and the positioning protrusions 210, the paper pressing sheet metal part 100 and the paper pressing background plate 200 are quickly positioned, and the paper pressing background plate 200 and the paper pressing sheet metal part 100 are quickly assembled. The paper pressing background plate 200 is fixedly connected to the paper pressing sheet metal part 100. The installation process of the paper pressing board assembly 14 is simple, and the influence of human factors on the installation effect can be reduced. After the paper pressing background plate 200 is installed on the paper pressing sheet metal 100, no wrinkles, skew or bubbles will appear, ensuring that the contact surface between the paper pressing background plate 200 and the paper is flat, and the straightness and flatness of the entire paper pressing paper assembly 14 are good, ensuring the paper pressing effect, and then ensuring the scanning effect, so that the scan is clear and not skewed. In addition, compared with the gluing method in the related art, the paper pressing paper assembly 14 provided in this embodiment has a longer life, and the paper pressing background plate 200 will not fall off the paper pressing sheet metal 100 after long-term use.

[0052] In one embodiment, each positioning portion 111 is a positioning hole penetrating the first bottom wall 110 , each positioning protrusion 210 is a positioning column, and each positioning column passes through each positioning hole one by one. The positioning column is a plastic part, and the positioning column is fixed to the paper pressing sheet metal part 100 by hot melting.

[0053] Schematically, the paper pressing background plate 200 can be a plastic part as a whole, and each positioning column can be set on the paper pressing background plate 200 through an integrated molding process. After the positioning column passes through the corresponding positioning hole, the end of the positioning column away from the main body of the paper pressing background plate 200 passes through the positioning hole, and the part of the positioning column passing through the positioning hole is hot-melted on the back of the paper pressing sheet metal 100. The material after the hot-melt of the positioning column re-solidifies in the positioning hole and the back of the paper pressing sheet metal 100, thereby fixing the paper pressing sheet metal 100 and the paper pressing background plate 200.

[0054] For example, some of the positioning posts of the paper pressing background plate 200 may be heat-melted, wherein the number of the heat-melted positioning posts is not less than two. Alternatively, all the positioning posts of the paper pressing background plate 200 may be heat-melted.

[0055] In this structure, the positioning column is fixed to the paper pressing sheet metal 100 by hot melting, so as to fix the paper pressing background plate 200 on the paper pressing sheet metal 100, and the reliability of the connection between the paper pressing background plate 200 and the paper pressing sheet metal 100 can be ensured.

[0056] In one embodiment, Figure 4 and Figure 5 As shown, the positioning portion 111 is a positioning hole provided on the first bottom wall 110. The positioning protrusion 210 includes a column 211 and a plurality of supporting portions 212, which are spaced apart along the circumference of the column 211, and each supporting portion 212 abuts against the hole wall of the positioning hole.

[0057] The positioning hole may be a through hole penetrating the first bottom wall 110 , or a blind hole of the first bottom wall 110 toward the paper pressing background plate 200 , which is not limited here.

[0058] Schematically, a plurality of grooves are formed on the side wall of the positioning protrusion 210, and the plurality of grooves are distributed around the axis of the positioning protrusion 210. The plurality of grooves define a column 211 and a plurality of support portions 212 distributed along the circumference of the column 211 on the positioning protrusion 210. Optionally, the plurality of support portions 212 may be distributed at equal intervals around the axis of the column 211. The number of support portions 212 is non-limiting, such as Figure 5 As shown, four support portions 212 may be provided on the outer periphery of the column 211 .

[0059] In this structure, the positioning protrusion 210 is abutted against the hole wall of the positioning hole through a plurality of support parts 212. While ensuring that the positioning hole can reliably limit the positioning protrusion 210, the contact area between the hole wall of the positioning hole and the positioning protrusion 210 is reduced, thereby reducing the friction between the hole wall of the positioning hole and the positioning protrusion 210, making it easier for the positioning protrusion 210 to extend into the positioning hole, which is beneficial to improving the assembly efficiency between the paper pressing sheet metal 100 and the paper pressing background plate 200.

[0060] In one embodiment, Figure 4 and Figure 6 As shown, a plurality of locking holes 112 are further provided on the first bottom wall 110, and a plurality of locking members 220 are provided on the paper pressing background plate 200. Each locking member 220 passes through each locking hole 112 one by one and is locked with the edge of the corresponding locking hole 112.

[0061] It is understandable that the number of the holes 112 on the first bottom wall 110 is the same as the number of the fasteners 220 on the paper pressing background plate 200. Those skilled in the art can set the number of the fasteners 220 and the holes 112 as needed, which is not limited here. Among them, the shape of the hole 112 can be a suitable shape such as a rectangle, a circle or an ellipse, which is not limited here. It is worth mentioning that each fastener 220 is provided with a limiting protrusion. During the process of the fastener 220 passing through the corresponding hole 112, the fastener 220 can be elastically deformed so that the limiting protrusion passes over the hole 112. After the limiting protrusion passes over the hole 112, the fastener 220 elastically recovers, so that the limiting protrusion is offset against the portion of the first bottom wall 110 located at the edge of the hole 112.

[0062] In a possible implementation, the height of the positioning protrusion 210 on the paper pressing background plate 200 is greater than the height of the fastener 220 , thereby achieving positioning between the paper pressing background plate 200 and the paper pressing sheet metal component 100 before the fastener 220 is engaged with the corresponding fastening hole 112 .

[0063] With this structure, the paper pressing background plate 200 and the paper pressing sheet metal component 100 can be quickly connected, thereby improving the assembly efficiency of the paper pressing paper assembly 14 .

[0064] In a specific embodiment, Figure 4 and Figure 6 As shown, at least part of the latching member 220 includes two latches 221 disposed at intervals, and the two latches 221 are respectively engaged with different positions of the edge of the latching hole 112 .

[0065] It is understandable that only some of the fasteners 220 on the paper pressing background plate 200 may include two fasteners 221 disposed at intervals, or all of the fasteners 220 on the paper pressing background plate 200 may include two fasteners 221 disposed at intervals, and this is not a sole limitation. In a possible implementation, at least two fasteners 220 include two fasteners 221 disposed at intervals, ensuring that the paper pressing background plate 200 is not easily detached from the paper pressing sheet metal part 100.

[0066] Exemplarily, each buckle 221 is provided with a limiting protrusion, and the limiting protrusions of the two buckles 221 of the buckle member 220 are arranged opposite to each other, so that the two buckles 221 can be respectively engaged with the opposite sides of the same buckle hole 112. Figure 6 As shown, when the shape of the locking hole 112 is a rectangle, the two locking buckles 221 of the locking member 220 can be respectively locked with the positions of the two long side edges of the rectangle.

[0067] Through the above arrangement, the reliability of the engagement between the fastener 220 and the corresponding engagement hole 112 is ensured, so that the paper pressing background plate 200 is not easy to fall off from the paper pressing sheet metal component 100 .

[0068] Optional, such as Figure 6 As shown, the latch 220 is latched with the edge of the latch hole 112 in the width direction of the paper pressing sheet metal 100 , and the size of the latch hole 112 in the length direction of the paper pressing sheet metal 100 is larger than the size of the corresponding latch 220 in the length direction of the paper pressing sheet metal 100 .

[0069] Exemplarily, the shape of the latch hole 112 may be rectangular, the latch member 220 may be latched with the long side edge of the rectangular latch hole 112 , and the long side length of the latch hole 112 is greater than the dimension of the latch member 220 in the length direction of the paper pressing sheet metal part 100 .

[0070] It can be understood that in the length direction of the paper pressing sheet metal 100, there is a design margin between the clamping hole 112 and the corresponding fastener 220. The above-mentioned setting is conducive to reducing the assembly accuracy between the paper pressing sheet metal 100 and the paper pressing background plate 200, and is conducive to improving the assembly efficiency between the paper pressing sheet metal 100 and the paper pressing background plate 200. The present embodiment does not limit the length of the portion where the clamping hole 112 exceeds the corresponding fastener 220, and those skilled in the art can set it according to actual needs. It is worth mentioning that after the fastener 220 is clamped with the corresponding clamping hole 112, the cooperation between the positioning protrusion 210 and the corresponding positioning portion 111 can limit the movement of the paper pressing background plate 200 relative to the paper pressing sheet metal 100 along the length direction of the paper pressing sheet metal 100.

[0071] In one possible implementation, Figure 4-Figure 6 As shown, there are two positioning portions 111 , and the two positioning portions 111 and the plurality of latch holes 112 are arranged at intervals along the length direction of the paper pressing sheet metal component 100 , and the plurality of latch holes 112 are located between the two positioning portions 111 .

[0072] Schematically, in the length direction of the paper pressing sheet metal 100, two positioning parts 111 are respectively arranged near the two ends of the paper pressing sheet metal 100 in the length direction. After the two positioning protrusions 210 on the paper pressing background plate 200 pass through the two positioning parts 111 on the paper pressing sheet metal 100, the paper pressing background plate 200 will not move relative to the paper pressing sheet metal 100 in a direction parallel to the first bottom wall 110. Exemplarily, a plurality of clamping holes 112 can be arranged between the two positioning parts 111 at equal intervals.

[0073] In this embodiment, the number of the positioning parts 111 is set to two, and accordingly, the number of the positioning protrusions 210 is also two, which ensures that the paper pressing background plate 200 will not move relative to the paper pressing sheet metal 100 in a direction parallel to the first bottom wall 110, while reducing the number of positioning structures between the paper pressing background plate 200 and the paper pressing sheet metal 100, which is conducive to improving the assembly efficiency of the paper pressing board assembly 14. A plurality of clamping holes 112 are located between the two positioning parts 111, and accordingly, a plurality of fasteners 220 on the paper pressing background plate 200 are located between the two positioning protrusions 210, and the fasteners 220 will not hinder the sight of the staff, so that the staff can extend the positioning protrusions 210 into the corresponding positioning parts 111. The two positioning parts 111 and the plurality of clamping holes 112 are arranged at intervals along the length direction of the paper pressing sheet metal 100, so that the paper pressing sheet metal 100 has multiple fixing points between the paper pressing background plate 200 and the paper pressing background plate 200 in its own length direction, ensuring the reliability of the connection between the paper pressing sheet metal 100 and the paper pressing background plate 200.

[0074] In one embodiment, Figure 4 and Figure 5 As shown, the paper pressing sheet metal part 100 further includes two first side walls 120 respectively located on opposite sides of the first bottom wall 110. The paper pressing background plate 200 includes a second bottom wall and two second side walls respectively located on opposite sides of the second bottom wall. The positioning protrusion 210 is arranged on the second bottom wall, and the second side wall is located on the periphery of the first side wall 120. The second side wall is provided with a hook 230, and the hook 230 is engaged with a side of the first side wall 120 away from the first bottom wall 110.

[0075] Among them, the first bottom wall 110 of the paper pressing sheet metal 100 and the two first side walls 120 respectively located on the opposite sides of the first bottom wall 110 define an approximate "U"-shaped structure, and the end of the pressure component can extend into the interior of the "U"-shaped structure and connect with the first bottom wall 110. The second bottom wall and the two second side walls of the paper pressing background plate 200 also define an approximate "U"-shaped structure, and the paper pressing sheet metal 100 is located inside the "U"-shaped structure. In a possible implementation, two hooks 230 are provided on each second side wall, and the two hooks 230 are arranged near the two ends of the second side wall in the length direction of the paper pressing background plate 200. When each hook 230 is engaged with the first side wall 120, the paper pressing background plate 200 can be fixed to the paper pressing sheet metal 100.

[0076] In a possible implementation, a limiting groove is provided on a side of the first side wall 120 away from the first bottom wall 110, and the protrusion of the hook 230 can extend into the limiting groove and engage with the bottom wall of the limiting groove. By providing the limiting groove, the hook 230 can be limited in the length direction of the paper pressing sheet metal part 100, thereby improving the reliability of the connection between the paper pressing background plate 200 and the paper pressing sheet metal part 100.

[0077] This structure, through the hook 230 of the paper pressing background plate 200, allows the paper pressing background plate 200 to be fixed on the paper pressing sheet metal 100 by snap connection, and the paper pressing background plate 200 and the paper pressing sheet metal 100 can be quickly connected, thereby improving the assembly efficiency of the paper pressing board assembly 14.

[0078] like Figure 7-Figure 9 As shown, the present application also provides a scanning device 10, including an image reader 11, a light-transmitting manuscript table 12, a pressure component 13 and the above-mentioned paperboard pressing assembly 14. The image reader 11 and the paperboard pressing assembly 14 are respectively located on opposite sides of the light-transmitting manuscript table 12, and the pressure component 13 is located on the side of the paperboard pressing assembly 14 away from the light-transmitting manuscript table 12 and connected to the paper pressing sheet metal part 100 of the paperboard pressing assembly 14. Exemplarily, the light-transmitting manuscript table 12 can be made of glass, that is, a glass manuscript table is used as the light-transmitting manuscript table 12.

[0079] Schematically, the scanning device 10 also includes an automatic document feeder (ADF) module. When the user needs to scan, the original (paper) can be placed on the paper feed tray of the ADF module. The paper is introduced from the paper feed tray of the ADF module and moves along the paper discharge direction. When the paper passes through the image reader 11, the content on the paper is read, and then the paper continues to move in the paper discharge direction, is discharged after passing through the paper discharge roller, and is finally stacked on the paper discharge tray or paper discharge area.

[0080] The image reader 11 may be a contact image sensor (CIS), and a spring may be used as the pressure component 13. The image reader 11 is located below the light-transmitting manuscript table 12, and the paper pressing board assembly 14 is located above the light-transmitting manuscript table 12, and the background part of the paper pressing board assembly 14, i.e., the paper pressing background plate 200, faces the light-transmitting manuscript table 12. The pressure component 13 is located above the paper pressing board assembly 14 and applies downward pressure to the paper pressing board assembly 14.

[0081] When scanning, the paper passes through the scanning area, i.e., the area on the transparent draft table 12 facing the image reader 11, and passes between the upper surface of the transparent draft table 12 and the paper pressing background plate 200 of the paper pressing assembly 14. At this time, the paper pressing assembly 14 applies downward pressure to the paper, so that the paper is closely attached to the upper surface of the transparent draft table 12 when passing through the scanning area. At the same time, the image reader 11 emits light to the area where the paper is pressed by the paper pressing assembly 14 and is closely attached to the upper surface of the transparent draft table 12 (i.e., upward). The light can pass through the transparent transparent draft table 12 and reach the paper (pass through the paper) and the background part of the paper pressing assembly 14 (the background part is not transparent). Then, the light is reflected (downward) and received by the light receiving part of the image reader 11. Since the light reflected by different parts of the paper (blank / colored) is different, the light signal received by the light receiving part of the image reader 11 is also different. Then, after photoelectric conversion and calculation, the image data on the paper is finally obtained to achieve scanning.

[0082] The scanning device 10 provided by the present application adopts the above-mentioned paper pressing board assembly 14, and the installation process of the paper pressing board assembly 14 is simple, which can reduce the influence of human factors on the paper pressing effect of the paper pressing board assembly 14. The paper pressing background plate 200 will not have wrinkles, skewness or bubbles, and can ensure the flatness of each area of ​​the paper pressing board assembly 14 along the length direction. Even if it is used for a long time, it is not easy to deform, ensuring that the contact surface between the paper pressing background plate 200 and the paper is flat, and ensuring the scanning effect.

[0083] The present application also provides an image forming device, comprising the above-mentioned scanning device 10.

[0084] The image forming device has copying and scanning functions, and the scanning device 10 can be installed on the upper part of the body of the image forming device and electrically connected to the body of the image forming device. When the user places the original document to be scanned on the paper feed tray of the ADF module of the image forming device, the scanning operation can be controlled through the panel of the image forming device or on the software of other terminal devices.

[0085] The image forming device provided in the present application adopts the above-mentioned scanning device 10, so the scanning clarity can be guaranteed.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A paperboard assembly, characterized in that: include: A paper pressing sheet metal component, the paper pressing sheet metal component comprises a first bottom wall, a plurality of positioning parts are arranged on the first bottom wall, and the plurality of positioning parts are respectively located at different positions of the first bottom wall; A paper pressing background plate, wherein the paper pressing background plate is at least partially located on one side of the first bottom wall, and a plurality of positioning protrusions are arranged on the paper pressing background plate, and each of the positioning protrusions extends into each of the positioning parts in a one-to-one correspondence, and the paper pressing background plate is fixedly connected to the paper pressing sheet metal component.

2. The paperboard assembly according to claim 1, characterized in that: Each of the positioning portions is a positioning hole penetrating through the first bottom wall, each of the positioning protrusions is a positioning column, and each of the positioning columns passes through each of the positioning holes in a one-to-one correspondence; The positioning column is a plastic part, and the positioning column is fixed to the paper pressing sheet metal part by hot melting.

3. The paperboard assembly according to claim 1, characterized in that: The positioning portion is a positioning hole arranged on the first bottom wall, and the positioning protrusion includes a column and a plurality of supporting portions, the plurality of supporting portions are spaced apart and distributed along the circumference of the column, and each of the supporting portions abuts against the hole wall of the positioning hole.

4. The paperboard assembly according to any one of claims 1 to 3, characterized in that: The first bottom wall is also provided with a plurality of snap holes, and the paper pressing background plate is provided with a plurality of snap fasteners, each of the snap fasteners correspondingly passes through each of the snap holes and snaps with the edge of the corresponding snap hole.

5. The paperboard assembly according to claim 4, characterized in that: At least part of the buckle parts include two buckles arranged at intervals, and the two buckles are respectively engaged with different positions of the edge of the buckle hole.

6. The paperboard assembly according to claim 4, characterized in that: The snap fastener is snapped with the edge of the snap hole in the width direction of the paper pressing sheet metal, and the size of the snap hole in the length direction of the paper pressing sheet metal is larger than the size of the corresponding snap fastener in the length direction of the paper pressing sheet metal.

7. The paperboard assembly according to claim 4, characterized in that: The number of the positioning parts is two, and the two positioning parts and the plurality of clamping holes are arranged at intervals along the length direction of the paper pressing sheet metal component, and the plurality of clamping holes are located between the two positioning parts.

8. The paperboard assembly according to any one of claims 1 to 3, characterized in that: The paper pressing sheet metal component also includes two first side walls respectively located on opposite sides of the first bottom wall, the paper pressing background plate includes a second bottom wall and two second side walls respectively located on opposite sides of the second bottom wall, the positioning protrusion is arranged on the second bottom wall, the second side wall is located on the outer periphery of the first side wall, and a hook is arranged on the second side wall, and the hook is clamped with a side of the first side wall away from the first bottom wall.

9. A scanning device, characterized in that: It comprises an image reader, a light-transmitting manuscript table, a press component and a paperboard assembly according to any one of claims 1 to 8; The image reader and the paper pressing board assembly are respectively located on opposite sides of the light-transmitting manuscript platform, and the pressing component is located on a side of the paper pressing board assembly away from the light-transmitting manuscript platform and is connected to the paper pressing sheet metal part of the paper pressing board assembly.

10. An image forming device, characterized in that: Comprising the scanning device as claimed in claim 9.

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