Paper pressing elastic structure and paper shredder

Abstract

The application provides a paper pressing elastic structure and a paper shredder. The paper pressing elastic structure comprises a first seat, a second seat, a first elastic member and a second elastic member. The top end of the first seat is configured to be close to a cover plate; the top end of the second seat is located in the first seat and is configured to be movable upward relative to the first seat; the top end of the first elastic member is configured to be close to or contact the cover plate, and the bottom end of the first elastic member is arranged on the top end of the second seat and is limited in the horizontal direction by the first seat; the top end of the second elastic member abuts against the bottom end of the second seat, and the bottom end of the second elastic member is configured to be arranged on a paper pressing plate of the paper shredder; and the stiffness coefficient of the first elastic member is smaller than the stiffness coefficient of the second elastic member. By reducing the stiffness coefficient of the first elastic member at the upper level, the first elastic member can provide a larger stroke amount compared with the second elastic member under the same pressure, so that the pressure on the bottom layer of paper can be reduced in the case of multiple papers, and the friction between the papers when the rollers are rubbing the papers can be reduced, thereby facilitating the rollers to rub the papers.

Description

Technical Field

[0001] This application relates to the technical field of paper shredders, and more specifically, to a paper-pressing elastic structure and a paper shredder. Background Technology

[0002] Paper shredders are common office equipment in modern offices due to their privacy function. To prevent paper from shifting during shredding, the inside of the shredder cover is usually equipped with a flexible structure and a pressure plate to hold the paper in place. When the shredder is working, the paper feed rollers sequentially shred the paper, feeding it into the interlocking blades to achieve the shredding function.

[0003] Currently, the elastic structure between the cover plate and the pressure plate is mostly a single spring. When a lot of paper is put into the paper box at once, the pressure on the bottom paper increases, which causes the friction between the papers to increase geometrically. This makes it difficult for the paper feeding roller to feed the paper, resulting in more than two sheets being fed into the paper inlet, which can easily cause paper jams or lead to unsatisfactory paper shredding. Utility Model Content

[0004] This application addresses the shortcomings of existing methods by proposing a paper-pressing elastic structure to solve the technical problem that when there are many sheets of paper in the paper box, the friction between the sheets increases geometrically, which is not conducive to the paper feeding rollers feeding the paper, resulting in more than two sheets being fed into the paper inlet, which can easily cause paper jams or unsatisfactory paper shredding.

[0005] In a first aspect, embodiments of this application provide a paper-pressing elastic structure, comprising: The first one has its top configured to be close to the cover plate; The second seat, with its top located inside the first seat, is configured to move upward relative to the first seat; The first elastic element has its top end configured to be close to or in contact with the cover plate, and its bottom end disposed on the top end of the second seat, and is limited by the first seat in the horizontal direction; The second elastic element has its top end abutting against the bottom end of the second seat, and the bottom end is configured to be disposed on the pressure plate of the shredder; the stiffness coefficient of the first elastic element is smaller than that of the second elastic element.

[0006] Optionally, the paper-pressing elastic structure includes at least one of the following: The pitch of the first elastic element is greater than the pitch of the second elastic element; The diameter of the first elastic element is larger than the diameter of the second elastic element.

[0007] Optionally, the diameter of the top end of the first elastic member is larger than the diameter of the bottom end of the first elastic member; The diameter of the bottom end of the first elastic element is larger than the diameter of the second elastic element.

[0008] Optionally, the first elastic element is in the shape of an inverted frustum, and the diameter of the first elastic element gradually increases from the second segment to the first end; The diameter of the second elastic element is equal at all points, and the pitch of any two adjacent segments of the second elastic element is equal.

[0009] Optionally, the first seat is hollow and has an inverted frustum shape with openings at both ends, and the second seat is hollow and has an inverted frustum shape with an opening at the top.

[0010] Optionally, the first seat includes an ear disposed on the top side, the top being configured to have a vertical distance from the cover plate of the shredder, and the ear being configured to be detachably connected to the cover plate.

[0011] Optionally, the top outer periphery of the second seat is provided with a first stop protrusion, and the bottom end of the first seat is provided with a second stop protrusion for abutting and limiting the first stop protrusion.

[0012] Optionally, the first stop protrusion includes a first stop ring extending horizontally outward and a second stop ring extending along the generatrix of the side wall of the second seat. The second end of the first elastic member abuts against or contacts the first stop ring and is limited in the horizontal direction by the second stop ring and the side peripheral wall of the first seat.

[0013] Optionally, the outer wall of the second seat is provided with at least one first guide rib extending along the generatrix of the side wall of the second seat, and the inner wall of the second stop boss is provided with at least one first guide groove.

[0014] Optionally, the inner wall of the first seat is provided with at least one second guide rib extending along the side wall generatrix, and the outer wall of the first stop ring is provided with at least one second guide groove.

[0015] Secondly, this application provides a paper shredder, including a cover plate arranged from top to bottom, a paper-pressing elastic structure as described in the above embodiments, and a pressing board; The paper-pressing elastic structure includes a first seat, a second seat, a first elastic element, and a second elastic element; The top of the first seat is close to the cover plate, and the top of the second seat is located inside the first seat; The top end of the first elastic element is close to or in contact with the cover plate, and the bottom end is disposed on the top end of the second seat; The top end of the second elastic member abuts against the bottom end of the second seat, and the bottom end is disposed on the pressure plate of the shredder.

[0016] Optionally, the shredder further includes a limiting member, the bottom end of which is fixed to the top of the pressure plate, the top end of which is located inside the second seat and is configured to slide upward relative to the second seat, and the second elastic member is configured to be limited by the limiting member in the horizontal direction. The top of the limiting member is provided with a stop for abutting against the bottom of the second seat.

[0017] The beneficial technical effects of the technical solutions provided in this application include: In this embodiment, the original single spring is split into two stages of elastic elements with different stiffness coefficients. The stiffness coefficient of the first elastic element in the upper stage is designed to be smaller than that of the second elastic element in the lower stage. Compared with the second elastic element, the first elastic element can provide a larger stroke under the same pressure. In other words, when the amount of paper in the paper box is the same, especially when the amount of paper is large (e.g., 80-600 sheets), the first elastic element applies less pressure to the paper compared with the second elastic element. Therefore, the paper-pressing elastic structure of this application has a length that is the sum of the lengths of the first and second elastic elements compared with the related technology. The single spring with a stiffness coefficient equal to that of the second elastic element can reduce the pressure on the stack of paper to be crushed when there are many sheets of paper (80-600 sheets), thereby reducing the friction between the sheets in the stack and facilitating the roller to crush the bottom sheet of the stack. When the amount of paper in the paper box increases further, the first and second elastic elements are compressed simultaneously. Compared with a single spring, the pressure applied to the paper can be reduced, and the friction between the sheets can be reduced. This application uses two elastic elements with different stiffness characteristics to optimize the pressure applied to the paper by the pressure plate, making it more adaptable to changes in paper thickness and avoiding over- or under-pressure. This ensures that the pressure plate applies appropriate pressure to the paper regardless of whether there is a lot or a little paper. It also facilitates the rollers to shred the bottom sheet of the paper stack and prevents multiple sheets from being shredded, thus improving shredding efficiency and shredding effect. Furthermore, the first elastic element is disposed within the first seat, which can limit the first elastic element in the horizontal direction, ensuring that the first elastic element can only extend and retract axially. The second seat can move upward relative to the first seat, providing a greater stroke during paper pressing, thereby allowing more paper to be accommodated in the paper box, and ensuring that the pressing plate maintains appropriate pressure on the paper when multiple papers are in use; the bottom end of the first elastic element abuts against the top end of the second seat, and when the second seat slides upward relative to the first seat, it can drive the first elastic element to compress, realizing multi-stage force transmission.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a paper-pressing elastic structure arranged on a pressing board, as provided in an embodiment of this application. Figure 2 For the purposes of this application's embodiments Figure 1 A partial cross-sectional view along the a-a' direction made from the perspective view in the diagram; Figure 3 This is a schematic diagram of a paper-pressing elastic structure disposed between a cover plate and a pressing plate, as provided in an embodiment of this application. Figure 4 Examples of this application Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a schematic diagram of a paper-pressing elastic structure provided in an embodiment of this application; Figure 6 For the purposes of this application, the embodiments will be Figure 5 A schematic diagram of the first hidden structure in the middle; Figure 7 A schematic diagram of the structure of the first seat and the first elastic member provided in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the second seat and the second elastic member provided in the embodiments of this application; Figure 9 A schematic diagram of a paper-pressing elastic structure provided in an embodiment of this application, viewed from a slightly top-down angle; Figure 10 A schematic diagram of the state of a paper-pressing elastic structure in the first paper weight range provided in the embodiments of this application; Figure 11 This is a schematic diagram illustrating the state of a paper-pressing elastic structure in a second paper weight range, as provided in an embodiment of this application. Figure 12 This is a schematic diagram of the state of a paper-pressing elastic structure provided in an embodiment of this application when the paper weight is in the third range. Explanation of reference numerals in the attached figures: 10 - The First Seat; 11-Second stop boss; 111-First guide groove; 12-Second guide rib; 13-Ear; 20 - The second seat; 21-First stop boss; 211-First stop ring; 2111-Second guide groove; 212 - Second stop ring; 22-First guide rib; 23-Third stop boss; 30 - First elastic element; 40 - Second elastic element; 50 - Pressing plate; 60 - Cover plate; 70 - Limiting component; 71 - Stopping component; 80 - Mounting bracket. Detailed Implementation

[0020] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0021] Those skilled in the art will understand that, unless specifically stated otherwise, the terms "described" and "the" as used herein may also include plural forms. It should be further understood that the term "comprising" as used in the specification of this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by the art. The term "and / or" as used herein refers to at least one of the items defined by the term; for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0023] In related technologies, the inner side of the shredder cover is usually equipped with a flexible structure and a pressure plate to hold the paper in the paper tray in place. When the shredder is working, the paper feed rollers sequentially rub the paper, feeding the paper in the paper tray into the interlocking blades to achieve the shredding function.

[0024] Currently, the elastic structure between the cover plate and the pressure plate is mostly a single spring. When a large amount of paper is put into the paper box at one time, the compression stroke and clamping force of the single spring increase. This causes the bottom paper in the paper box to not only bear the pressure of the top paper, but also the pressure applied by the single spring. This causes the friction between the papers to increase geometrically, which is not conducive to the paper feeding rollers feeding the paper. As a result, more than two sheets are fed into the paper inlet, which can easily cause paper jams or lead to unsatisfactory paper shredding.

[0025] To address the aforementioned technical problems, this application provides a novel paper-pressing elastic structure and a paper shredder.

[0026] Reference Figures 1-12 This application provides a paper-pressing elastic structure, including a first seat 10, a second seat 20, a first elastic element 30, and a second elastic element 40.

[0027] Reference Figures 1-5The top of the first seat 10 is configured to be close to the cover plate 60; the top of the second seat 20 is located inside the first seat 10 and is configured to be movable upward relative to the first seat 10. The top of the first elastic member 30 is configured to be close to or in contact with the cover plate 60, and its bottom end is disposed on the top of the second seat 20 and is limited in the horizontal direction by the first seat 10. The top of the second elastic member 40 abuts against the bottom end of the second seat 20, and its bottom end is configured to be disposed on the pressure plate 50 of the shredder. The stiffness coefficient of the first elastic member 30 is smaller than that of the second elastic member 40.

[0028] In this embodiment, the original single spring is split into two stages of elastic elements with different stiffness coefficients. The stiffness coefficient of the first elastic element 30 in the upper stage is designed to be smaller than that of the second elastic element 40 in the lower stage. The first elastic element 30 provides a greater stroke under the same pressure compared to the second elastic element 40. In other words, when the amount of paper in the paper tray is the same, especially when the amount of paper is large (e.g., 80-600 sheets), the first elastic element 30 applies less pressure to the paper compared to the second elastic element 40, thus improving the paper pressing performance of this application. Compared to related technologies, the elastic structure has a length equal to the sum of the lengths of the first elastic element 30 and the second elastic element 40, and a single spring with a stiffness coefficient equal to that of the second elastic element 40. In the case of multiple sheets (80-600 sheets), it can reduce the pressure on the stack of paper to be crushed, thereby reducing the friction between the sheets in the stack, which is beneficial for the roller to rub out the bottom sheet of the stack. When the number of sheets in the paper box increases further, the first elastic element 30 and the second elastic element 40 are compressed simultaneously. Compared to a single spring, this can reduce the pressure applied to the paper and reduce the friction between the sheets.

[0029] This application uses two elastic elements with different stiffness characteristics to optimize the pressure applied to the paper by the pressure plate 50, making it more adaptable to changes in paper thickness and avoiding over- or under-pressure. This ensures that the pressure plate 50 applies appropriate pressure to the paper regardless of whether there is a lot or a little paper, which helps the rollers to shred the bottom sheet of the paper stack and prevents multiple sheets from being shredded, thus improving shredding efficiency and shredding effect.

[0030] Furthermore, the first elastic element 30 is disposed within the first seat 10, and the first seat 10 can limit the first elastic element 30 in the horizontal direction, ensuring that the first elastic element 30 can only extend and retract in the axial direction. The second seat 20 can move upward relative to the first seat 10, providing a larger stroke when pressing paper, thereby allowing more paper to be contained in the paper box, and ensuring that the pressing board 50 maintains appropriate pressure on the paper when multiple papers are in use; the bottom end of the first elastic element 30 abuts against the top end of the second seat 20, and when the second seat 20 slides upward relative to the first seat 10, it can drive the first elastic element 30 to compress.

[0031] It should be noted that the horizontal direction refers to the direction parallel to the horizontal plane, that is, the direction perpendicular to the axial direction of the paper-pressing elastic structure, when the paper-pressing elastic structure is in working condition.

[0032] Reference Figure 2 and Figure 6 , Figure 2 To Figure 1 The perspective view version is a partial cross-sectional view along the a-a' direction, forming a structural schematic diagram to show the shape of the first elastic member 30 inside the first seat 10 and the positional and connection relationship between the first elastic member 30 and the top of the second seat 20. Optionally, the pitch of the first elastic member 30 is greater than the pitch of the second elastic member 40.

[0033] Assuming that, under the same diameter, if the pitch of the first elastic element 30 is greater than the pitch of the second elastic element 40, the stiffness coefficient of the first elastic element 30 can be made smaller than the stiffness coefficient of the second elastic element 40.

[0034] Optionally, refer to Figure 2 and Figure 6 The diameter of the first elastic element 30 is larger than the diameter of the second elastic element 40.

[0035] Assuming that, under the same pitch, if the diameter of the first elastic element 30 is greater than the diameter of the second elastic element 40, the stiffness coefficient of the first elastic element 30 can be made smaller than the stiffness coefficient of the second elastic element 40.

[0036] It should be noted that the "diameter" mentioned above refers to the mean diameter or outer diameter of the first elastic element 30 and the second elastic element 40 when the wire diameters of the first elastic element 30 and the second elastic element 40 are the same.

[0037] Optionally, refer to Figure 6 The diameter of the top end of the first elastic member 30 is greater than the diameter of the bottom end of the first elastic member 30. The diameter of the bottom end of the first elastic member 30 is greater than the diameter of the second elastic member 40.

[0038] In this embodiment, the diameter of the bottom end of the first elastic member 30 is larger than the diameter of the second elastic member 40, thereby achieving a stable connection between the top end of the second elastic member 40 and the bottom end of the first elastic member 30. This allows the pressure of the pressing plate 50 on the paper to change gradually, ensuring that the pressing plate 50 can apply appropriate pressure to paper of different weights.

[0039] Optionally, refer to Figure 6 The first elastic element 30 is generally shaped like an inverted frustum, and its diameter gradually increases from the second segment to the first end. The diameter of the second elastic element 40 is equal at all points, and the pitch between any two adjacent segments of the second elastic element 40 is equal. In this embodiment, by designing the diameter of the first elastic element 30 to gradually increase from the second segment to the first end, the pressure of the pressing plate 50 on the paper can gradually decrease as the amount of paper increases. This allows the pressing elastic structure of this application to better adapt to changes in paper thickness, avoiding over-pressure or under-pressure. Thus, it can ensure that the pressing plate 50 applies appropriate pressure to the paper whether there is a lot of paper or a little paper, facilitating the paper feeding by the rollers and improving the shredding efficiency and shredding effect.

[0040] Optionally, refer to Figure 2 and Figure 6 In this application, the first elastic element 30 uses a conical spring, and the second elastic element 40 uses a compression spring. The conical spring can be either a constant-pitch type or a variable-pitch type. When a variable-pitch type conical spring is selected, the pitch of the spring can be designed to gradually increase from the bottom to the top, which facilitates uniform force transmission during paper pressing, causing the pressure on the pressing plate 50 to gradually decrease as the paper pressure increases. This application only uses a constant-pitch conical spring as an example for illustration.

[0041] Optionally, refer to Figures 5-7 The first one, number 10, is hollow and has an inverted frustum shape with openings at both ends; the second one, number 20, is hollow and has an inverted frustum shape with an opening at the top.

[0042] In this application, the first elastic element 30 is arranged within the hollow structure of the first seat 10. Therefore, both the first seat 10 and the second seat 20 are designed as inverted frustum shapes to adapt to the shape of the first elastic element 30 and improve the effect of horizontally limiting the first elastic element 30. At the same time, the upward movement trajectory of the second seat 20 is the same as the compression trajectory of the first elastic element 30, thereby ensuring that the compression process of the first elastic element 30 is smooth, and thus improving the paper pressing effect of the pressing board 50.

[0043] Furthermore, both the first seat 10 and the second seat 20 are inverted frustum shapes, which makes the paper-pressing elastic structure of this application more stable.

[0044] Optionally, refer to Figure 4 and Figure 7 The first seat 10 includes an ear 13 disposed on the top side, the top being configured to have a vertical gap with the cover plate 60 of the shredder, and the ear 13 being configured to be detachably connected to the cover plate 60.

[0045] In this embodiment, when the pressure plate 50 is not pressing paper, the top end of the first elastic member 30 approaches or contacts the cover plate 60. When the pressure plate 50 presses paper, the top end of the first elastic member 30 abuts against the cover plate 60.

[0046] Optionally, the cover plate 60 is provided with crisscrossing grid plates, and the limiting space formed by any four adjacent grid plates can accommodate the first elastic member 30. Therefore, when the first elastic member 30 is placed in the limiting space, the top end of the first seat 10 abuts against the bottom end of the grid plate, and the cover plate 60 is fixed to the ear 13 with screws. This arrangement creates a certain vertical distance between the top end of the first seat 10 and the cover plate 60, which allows for a further increase in the travel of the second seat 20 and a further increase in the amount of paper that can be accommodated in the paper box.

[0047] Optionally, refer to Figure 7 At least two ears 13 are arranged to ensure a stable connection between the first seat 10 and the cover plate 60. This application only illustrates an example where two ears 13 are symmetrically arranged relative to the axial direction at the top of the first seat 10. Ears 13 Optionally, refer to Figures 6-7 The top outer periphery of the second seat 20 is provided with a first stop protrusion 21, and the bottom end of the first seat 10 is provided with a second stop protrusion 11 for abutting and limiting the first stop protrusion 21.

[0048] In this embodiment, by designing a first stop protrusion 21 at the top of the second seat 20, when the pressing paperboard 50 is not pressing paper, the first stop protrusion 21 can abut against the second stop protrusion 11, preventing the second seat 20 from coming out of the first seat 10, thereby ensuring the stability of the paper pressing elastic structure of this application and avoiding structural failure.

[0049] Optionally, refer to Figure 2 and Figure 8 The first stop protrusion 21 includes a first stop ring 211 extending horizontally outward and a second stop ring 212 extending along the generatrix of the side wall of the second seat 20. The second end of the first elastic member 30 abuts against or contacts the first stop ring 211 and is limited in the horizontal direction by the second stop ring 212 and the side peripheral wall of the first seat 10.

[0050] In this application, the first stop ring 211 and the second stop ring 212 enclose an approximately L-shaped space for inserting the first elastic member 30. The bottom end of the first elastic member 30 is fitted onto the second stop ring 212 to limit the horizontal displacement of the first elastic member 30.

[0051] Optionally, refer to Figures 5-7 The outer wall of the second seat 20 is provided with at least one first guide rib 22 extending along the generatrix of the side wall of the second seat 20, and the inner wall of the second stop boss 11 is provided with at least one first guide groove 111.

[0052] The first guide rib 22 and the first guide groove 111 on the inner wall of the second stop protrusion 11 form a set of guide structures to limit the movement trajectory of the second seat 20 when it moves, and to prevent the second seat 20 from vibrating due to external forces when it slides, thereby ensuring the stable transmission of force.

[0053] Optionally, refer to Figures 8-9 The inner wall of the first seat 10 is provided with at least one second guide rib 12 extending along the side wall generatrix, and the outer wall of the first stop ring 211 is provided with at least one second guide groove 2111.

[0054] In this application, at least one second guide rib 12 is provided on the inner wall surface of the first seat 10, so that the second guide rib 12 and the second guide groove 2111 on the first stop ring 211 form another set of guide structures, thereby improving the limiting and guiding effect when the second seat 20 moves.

[0055] Optionally, multiple first guide ribs 22 are provided and arranged around the circumferential spacing of the second seat 20. Multiple second guide ribs 12 are also provided, and the multiple second guide ribs 12 are arranged around the circumferential spacing of the first seat 10 to ensure that the force is uniformly distributed in both the first seat 10 and the second seat 20, to ensure stable force transmission, and thus to improve the stability of paper pressing.

[0056] In summary, referring to Figures 10-12 The paper-pressing elastic structure of this application has the following paper-pressing states under different paper weights: Reference Figure 10 In the first scenario, when the stack of paper to be shredded in the paper tray is within the first paper quantity range, for example, no more than 80 sheets, the first elastic element 30 is pre-compressed, while the second elastic element 40 is not compressed. Within the first paper quantity range (relatively small amount of paper), appropriate pressure is maintained on the stack of paper to be shredded to ensure that the rollers can smoothly shred the bottom sheet of the stack, thus improving the shredding effect.

[0057] Reference Figure 11 In the second scenario, when the paper to be shredded in the cardboard box is stacked within the second paper quantity range, for example, between 80 (excluding) and 300 (including) sheets, the height of the pressure plate 50 increases. Since the resistance to the upward sliding of the second seat 20 (i.e., the resistance to the compression of the first elastic element 30) is less than the resistance to the compression of the second elastic element 40, the second seat 20 moves upward, causing most of it to extend into the first seat 10. This compresses the first elastic element 30, while the second elastic element 40 is pre-compressed, ensuring that the pressure plate 50 maintains appropriate pressure on the paper. Compared to a single spring, the paper-pressing elastic structure of this application can reduce the pressure of the pressure plate 50 on the paper within the second paper quantity range.

[0058] Reference Figure 12In the third scenario, when the stack of paper to be shredded inside the cardboard box falls within a third paper quantity range, for example, between 300 (excluding) and 600 (including) sheets, the height of the pressure plate 50 increases further, and most of the limiting member 70 extends into the second seat 20, thereby compressing the second elastic member 40. In this case, the paper-pressing elastic structure of this application, compared to a single spring, can reduce the pressure of the pressure plate 50 on the paper within the third paper quantity range.

[0059] This application enables the pressure of the pressing plate 50 on the paper to gradually decrease as the amount of paper increases, thereby making the pressing elastic structure of this application more adaptable to changes in paper thickness, avoiding over-pressure or under-pressure, thus ensuring that the pressing plate 50 applies appropriate pressure to the paper whether there is a lot of paper or a little paper, facilitating the roller to shred the paper, and improving the shredding efficiency and shredding effect.

[0060] Based on the same inventive concept, this application also provides a paper shredder. (Refer to...) Figures 1-12 A paper shredder includes a cover plate 60 arranged from top to bottom, a paper pressing elastic structure as described in the above embodiment, and a pressing plate 50.

[0061] The paper-pressing elastic structure includes a first seat 10, a second seat 20, a first elastic element 30, and a second elastic element 40. The top of the first seat 10 is close to the cover plate 60, and the top of the second seat 20 is located inside the first seat 10. The top of the first elastic element 30 is close to or in contact with the cover plate 60, and its bottom end is located on the top of the second seat 20. The top of the second elastic element 40 abuts against the bottom end of the second seat 20, and its bottom end is located on the pressing plate 50 of the shredder.

[0062] The paper shredder of this embodiment can achieve all the functions of the paper-pressing elastic structure in the above embodiments. That is, it can ensure that the pressing board 50 applies appropriate pressure to the paper regardless of whether there is a lot of paper or a little paper, so as to facilitate the paper being shredded by the rollers and improve the shredding efficiency. The rest will not be described in detail here.

[0063] Optionally, refer to Figures 10-12 The shredder also includes a limiting member 70, the bottom of which is fixed to the top of the pressure plate 50. The top of the limiting member 70 is located inside the second seat 20 and is configured to slide upward relative to the second seat 20. The second elastic member 40 is configured to be limited by the limiting member 70 in the horizontal direction.

[0064] In this embodiment, the top of the pressure plate 50 is also provided with a limiting member 70, which can restrict the horizontal movement of the second elastic member 40, so that the second elastic member 40 can only extend and retract along the axial direction and rotate around the axis, thereby ensuring the stability and trajectory consistency of the second elastic member 40 when compressed.

[0065] Optionally, the limiting member 70 can be a guide rod, and the second elastic member 40 is sleeved on the outside of the guide rod. The bottom end of the second seat 20 has a through hole, so that the top end of the guide rod can pass through the through hole and extend into the interior of the second seat 20. When the paper in the paper box is further increased, the pressure plate 50 moves further upward. At this time, most of the second seat 20 slides into the interior of the first seat 10, and most of the guide rod slides into the interior of the second seat 20, so that both the second elastic member 40 and the first elastic member 30 are compressed.

[0066] Optionally, refer to Figures 8-9 The top of the limiting member 70 is provided with a stop member 71 for abutting and limiting the bottom of the second seat 20.

[0067] By designing a stop 71 at the top of the limiting member 70, the top of the limiting member 70 is prevented from detaching from the inside of the second seat 20, thereby causing the paper pressing elastic structure of this application to fail.

[0068] Optionally, the stop 71 can be integrally formed on the top of the guide rod, or it can be a separate component fixed to the top of the guide rod. The outer diameter of the stop 71 is larger than the diameter of the through hole to achieve the stopping function. In this application, the stop 71 is a screw threaded onto the top of the guide rod, such that the outer diameter of the screw head is larger than the diameter of the through hole.

[0069] Alternatively, the guide rod can be integrally formed with the pressure plate 50, or the pressure plate 50 can be fixed to the bottom end of the guide rod with screws.

[0070] Optionally, refer to Figures 10-12 Multiple mounting seats 80 are integrally formed on the top of the pressure plate 50. The mounting seats 80 are open at the top and hollow inside. The bottom ends of the guide rod and the second elastic member 40 are arranged in the mounting seats 80 to improve the connection stability between the guide rod and the pressure plate 50. At the same time, they can also work together with the guide rod to limit the horizontal movement of the second elastic member 40, thereby improving the limiting effect.

[0071] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0072] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0073] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0074] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0075] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A paper-pressing elastic structure, characterized in that, include: The first one, with its top constructed to be close to the cover plate; The second seat, with its top located inside the first seat, is configured to move upward relative to the first seat; The first elastic element has its top end configured to be close to or in contact with the cover plate, and its bottom end disposed on the top end of the second seat, and is limited by the first seat in the horizontal direction; The second elastic element has its top end abutting against the bottom end of the second seat, and the bottom end is configured to be disposed on the pressure plate of the shredder; the stiffness coefficient of the first elastic element is smaller than that of the second elastic element.

2. The paper-pressing elastic structure according to claim 1, characterized in that, Includes at least one of the following: The pitch of the first elastic element is greater than the pitch of the second elastic element; The diameter of the first elastic element is larger than the diameter of the second elastic element.

3. The paper-pressing elastic structure according to claim 2, characterized in that, The diameter of the top end of the first elastic member is larger than the diameter of the bottom end of the first elastic member; The diameter of the bottom end of the first elastic element is larger than the diameter of the second elastic element.

4. The paper-pressing elastic structure according to claim 3, characterized in that, The first elastic element is in the shape of an inverted frustum, and the diameter of the first elastic element gradually increases from the second segment to the first end; The diameter of the second elastic element is equal at all points, and the pitch of any two adjacent segments of the second elastic element is equal.

5. The paper-pressing elastic structure according to claim 1, characterized in that, The first seat is hollow and has an inverted frustum shape with openings at both ends, and the second seat is hollow and has an inverted frustum shape with an opening at the top.

6. The paper-pressing elastic structure according to claim 1, characterized in that, The first seat includes an ear disposed on the top side, the top being configured to have a vertical gap with the cover plate of the shredder, and the ear being configured to be detachably connected to the cover plate.

7. The paper-pressing elastic structure according to claim 1, characterized in that, The second seat has a first stop protrusion on the outer periphery of its top end, and the first seat has a second stop protrusion at its bottom end for abutting and limiting the first stop protrusion.

8. The paper-pressing elastic structure according to claim 7, characterized in that, The first stop protrusion includes a first stop ring extending horizontally outward and a second stop ring extending along the generatrix of the side wall of the second seat. The second end of the first elastic member abuts or contacts the first stop ring and is limited in the horizontal direction by the second stop ring and the side peripheral wall of the first seat.

9. The paper-pressing elastic structure according to claim 7, characterized in that, The outer wall of the second seat is provided with at least one first guide rib extending along the generatrix of the side wall of the second seat, and the inner wall of the second stop boss is provided with at least one first guide groove.

10. The paper-pressing elastic structure according to claim 8, characterized in that, The inner wall of the first seat is provided with at least one second guide rib extending along the generatrix of the side wall, and the outer wall of the first stop ring is provided with at least one second guide groove.

11. A paper shredder, characterized in that, It includes a cover plate arranged from top to bottom, at least one paper-pressing elastic structure as described in any one of claims 1-10, and a paper-pressing plate; The paper-pressing elastic structure includes a first seat, a second seat, a first elastic element, and a second elastic element; The top of the first seat is close to the cover plate, and the top of the second seat is located inside the first seat; The top end of the first elastic element is close to or in contact with the cover plate, and the bottom end is disposed on the top end of the second seat; The top end of the second elastic member abuts against the bottom end of the second seat, and the bottom end is disposed on the pressure plate of the shredder.

12. The paper shredder according to claim 11, characterized in that, It also includes a limiting member, the bottom end of which is fixed to the top of the pressure plate, the top end of which is located inside the second seat and is configured to slide upward relative to the second seat, and the second elastic member is configured to be limited by the limiting member in the horizontal direction; The top of the limiting member is provided with a stop for abutting against the bottom of the second seat.

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