A foldable sheet-type file box

Abstract

This utility model relates to the field of office supplies, and particularly to a foldable flat file box. It includes a base plate, a first horizontal plate, a second horizontal plate, a first vertical plate, a second vertical plate, and a third vertical plate, with a certain gap between the second and third vertical plates. The first horizontal plate is connected to the first vertical plate via a first adhesive plate, the first horizontal plate is connected to the second vertical plate via a second adhesive plate, the second horizontal plate is connected to the first vertical plate via a third adhesive plate, and the second horizontal plate is connected to the third vertical plate via a fourth adhesive plate. The first, second, third, and fourth adhesive plates have adhesive surfaces. The base plate is connected to a cover plate via a connecting plate. The file box also includes a paper presser, which includes a fixing part, a swing arm, and a torsion spring. This utility model file box can be completely flattened, facilitating transportation and saving space. The fixing part of the paper presser can be fixed to any of the following plates: the first horizontal plate, the second horizontal plate, or the first vertical plate, as needed.

Description

Technical Field

[0001] This utility model relates to the field of office supplies, and in particular to a foldable sheet-type file box. Background Technology

[0002] File boxes (also known as archive boxes) are common office supplies. They have a certain thickness and an internal paper compartment for storing documents and archives. The lid can be opened and closed for easy access. However, most existing file boxes use a one-piece molding structure. During transportation, the box cannot be flattened, resulting in a large space occupation and high transportation costs. Existing flattenable file boxes have small adhesive areas at the joints, leading to weak adhesion, easy detachment during use, and inability to be reused. Furthermore, the four-ring enclosure of existing flattenable file boxes is also a single piece, forming a four-ring closed box. If the documents are thick, it is inconvenient to reach the bottom layer, making document retrieval difficult. In addition, the paper clamps in existing file boxes are mostly fixed to the upper panel of the box with rivets. The clamp is equipped with a swing arm shaft and a tension spring, which pulls the clamp arm to compress the paper. However, the paper pressure arm shaft and tension spring fixing point are located low, occupying valuable space in the paper tray. When the documents in the paper tray are thick, the tension spring can cause indentations on the top of the paper documents and prevent the document box lid from closing completely. Furthermore, the paper pressure arm is fixedly connected to the document box, making it impossible to adjust the pressure position as needed. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a foldable sheet-type file box, including a base plate and a surrounding panel. The surrounding panel includes a first horizontal plate, a second horizontal plate, a first vertical plate, a second vertical plate, and a third vertical plate. One end of the base plate is connected to the first horizontal plate, and the opposite end is connected to the second horizontal plate. One side of the base plate is connected to the first vertical plate, and the opposite side is connected to the second and third vertical plates. The first horizontal plate, second horizontal plate, first vertical plate, second vertical plate, and third vertical plate are provided with folding lines along the edge of the base plate. The first horizontal plate, second horizontal plate, first vertical plate, second vertical plate, and third vertical plate can be folded along the edges. The plate is folded along a fold line; there is a certain gap between the second and third vertical plates; the first horizontal plate is connected to the first vertical plate via a first adhesive plate, the first horizontal plate is connected to the second vertical plate via a second adhesive plate, the second horizontal plate is connected to the first vertical plate via a third adhesive plate, and the second horizontal plate is connected to the third vertical plate via a fourth adhesive plate; the first, second, third, and fourth adhesive plates have adhesive surfaces; the side of the bottom plate connected to the second and third vertical plates is connected to the cover plate via a connecting plate, and fold lines are provided between the bottom plate and the connecting plate, and between the connecting plate and the cover plate.

[0004] The first adhesive plate is integrally connected to the first horizontal plate or the first vertical plate, the second adhesive plate is integrally connected to the first horizontal plate or the second vertical plate, the third adhesive plate is integrally connected to the second horizontal plate or the first vertical plate, and the fourth adhesive plate is integrally connected to the second horizontal plate or the third vertical plate.

[0005] In one embodiment, the first and third adhesive plates are integrally connected to both ends of the first vertical plate, with fold lines between the first and third adhesive plates and the first vertical plate; the second adhesive plate is integrally connected to the second vertical plate, and the fourth adhesive plate is integrally connected to the third vertical plate, with fold lines between the second adhesive plate and the second vertical plate, and between the fourth adhesive plate and the third vertical plate, respectively. Optionally, at least one side of the first, second, third, and fourth adhesive plates may have an adhesive surface; or adhesive surfaces may be provided on the first and second horizontal plates at positions corresponding to the first, second, third, and fourth adhesive plates.

[0006] Alternatively, the first and second adhesive plates are integrally connected to both ends of the first horizontal plate, with a fold line between the first and second adhesive plates and the first horizontal plate; the third and fourth adhesive plates are integrally connected to both ends of the second horizontal plate, with a fold line between the third and fourth adhesive plates and the second horizontal plate. Optionally, at least one side of the first, second, third, and fourth adhesive plates may have an adhesive surface; or adhesive surfaces may be provided on the first, second, and third vertical plates at positions corresponding to the first, second, third, and fourth adhesive plates.

[0007] Preferably, the adhesive surface can be a coated adhesive or Velcro.

[0008] Furthermore, the cover plate is provided with a connecting strip on the side away from the connecting plate, and the inner side of the connecting strip and the outer side of the first vertical plate are respectively provided with one of the hook side and the rough side of the Velcro.

[0009] Furthermore, the document box is also equipped with a paper presser, which includes a fixing part, a swing arm, and a torsion spring. The fixing part includes a fixing plate and fixing bolts or pins. The fixing plate has connecting holes. One or more of the first horizontal plate, second horizontal plate, first vertical plate, second vertical plate, and third vertical plate of the document box have corresponding connecting holes. The fixing plate is connected to the side plate of the document box by passing the fixing bolts or pins through the connecting holes. The upper part of the fixing part has two pivot holes, which are located on the same central axis and are parallel to the top of the fixing part. One end of the swing arm has two pivots, which are inserted into the pivot holes of the fixing part. The torsion spring is located in the pivot holes and is sleeved on the pivot of the swing arm. One end of the torsion spring is fixed to the fixing part, and the other end of the torsion spring is fixed to the pivot of the swing arm.

[0010] Alternatively, the fixing part is a U-shaped clamping groove structure composed of a fixing plate, a clamping plate, and a top-connected crossbeam. The paper presser is connected to the document box by inserting the U-shaped clamping groove of the fixing part into one of the surrounding plates of the document box.

[0011] Furthermore, a groove is provided on the inner side of the fixing plate of the fixing part corresponding to the position of the rotating shaft hole, and the end of the torsion spring that is fixed to the fixing part extends into the groove and engages.

[0012] Furthermore, the fixing plate of the fixing part is 9-11cm wide and 4-6cm high; the swing arm is 10-15cm long and 9-11cm wide.

[0013] The working principle of this utility model:

[0014] This utility model provides a foldable sheet-type document box. The base plate, first horizontal plate, second horizontal plate, first vertical plate, second vertical plate, third vertical plate, connecting plate, and cover plate can be completely flattened, facilitating transportation and saving space. The first horizontal plate, second horizontal plate, first vertical plate, second vertical plate, and third vertical plate can be folded upwards along the folding line to form a 90° angle perpendicular to the base plate. They are connected by a first adhesive plate, second adhesive plate, third adhesive plate, and fourth adhesive plate to form the paper compartment of the document box. According to the need for paper pressing, the fixing part of the paper presser is fixed to any one of the first horizontal plate, second horizontal plate, or first vertical plate. Overcoming the torsion spring, the swing arm is pulled upwards. After the document is placed in, the swing arm is lowered, and under the action of the torsion spring, the swing arm can press the document firmly. The cover plate folds upwards to close the entire paper compartment, forming a foldable sheet-type document box with a movable paper presser.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a foldable sheet-type document box, which can be completely flattened, saving a significant amount of space. This greatly reduces transportation costs and improves efficiency during bulk shipments, and also saves substantial warehousing costs. After assembly, the document box has the same strength as a conventional document box. The thickest part when flattened is the spine of the document box, because it has two layers: the second and third vertical panels and the connecting panel. If adjacent sheet-type document boxes are stacked face-to-face and upside down during packing, the thickness is reduced from four layers to three layers, saving an additional quarter of the volume space. The paper presser structure effectively avoids problems such as existing paper pressers occupying paper tray space, tearing document paper, and bending and deforming the side panels. The paper presser can also be installed on any side panel of the document box, providing a customized solution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the unfolded structure of Embodiment 1 of this utility model;

[0018] Figure 2This is a schematic diagram of the combined structure of Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the combined structure of Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of Embodiment 5 of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of Embodiment 5 of this utility model;

[0025] Figure 9 This is a schematic diagram of the structure of Embodiment 6 of this utility model;

[0026] Figure 10 This is a schematic diagram of the structure of Embodiment 6 of this utility model;

[0027] Figure 11 This is a schematic diagram of the combined structure of the document box and paper presser in Embodiment 9 of this utility model;

[0028] Figure 12 This is a schematic diagram of the paper press structure in Embodiment 9 of this utility model;

[0029] Figure 13 This is a schematic diagram of the combined structure of the document box and paper presser in Embodiment 10 of this utility model;

[0030] Figure 14 This is a schematic diagram of the combined structure of the document box and paper presser in Embodiment 10 of this utility model;

[0031] Figure 15 This is a schematic diagram of the separate structure of the document box and the paper press in Embodiment 10 of this utility model;

[0032] Figure 16 This is a schematic diagram of the paper press structure in Embodiment 10 of this utility model;

[0033] Figure 17 This is a schematic diagram of the paper press structure in Embodiment 10 of this utility model;

[0034] Figure 18 This is a schematic diagram of the paper press structure in Embodiment 10 of this utility model;

[0035] 1. Base plate; 2. First horizontal plate; 3. Second horizontal plate; 4. First vertical plate; 5. Second vertical plate; 6. Third vertical plate; 7. Folding line; 8. First adhesive plate; 9. Second adhesive plate; 10. Third adhesive plate; 11. Fourth adhesive plate; 12. Connecting plate; 13. Cover plate; 14. Connecting strip; 15. Fixing part; 16. Swing arm; 17. Torsion spring; 18. Fixing plate; 19. Crossbeam; 20. Rotary shaft hole; 21. Groove; 22. Clamping plate; 23. Adhesive surface; 24. Fixing bolt. Detailed Implementation

[0036] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0037] Example 1

[0038] See Figure 1-3 As shown, this embodiment provides a foldable sheet-type file box, including a base plate 1. A first horizontal plate 2 is connected to the upper end of the base plate 1, and a second horizontal plate 3 is connected to the opposite end (the lower end of the base plate 1). A first vertical plate 4 is connected to the right side of the base plate 1, and a second vertical plate 5 and a third vertical plate 6 are connected to the opposite side (the left end of the base plate 1). A folding line 7 is provided along the edge of the base plate 1 between the first horizontal plate 2, the second horizontal plate 3, the first vertical plate 4, the second vertical plate 5, and the third vertical plate 6. The first horizontal plate 2, the second horizontal plate 3, the first vertical plate 4, the second vertical plate 5, and the third vertical plate 6 serve as the enclosure of the file box and can be folded along the folding line 7, facilitating flattening and folding. A certain interval is provided between the second vertical plate 5 and the third vertical plate 6. This design facilitates easy access to documents by inserting a hand into the bottom of the paper tray. The first horizontal plate 2 and the first vertical plate 4 are connected by a first adhesive plate 8; the first horizontal plate 2 and the second vertical plate 5 are connected by a second adhesive plate 9; the second horizontal plate 3 and the first vertical plate 4 are connected by a third adhesive plate 10; and the second horizontal plate 3 and the third vertical plate 6 are connected by a fourth adhesive plate 11. Adhesive surfaces 23 are provided on the first adhesive plate 8, second adhesive plate 9, third adhesive plate 10, and fourth adhesive plate 11. The side of the bottom plate 1 connected to the second vertical plate 5 and the third vertical plate 6 is also connected to the cover plate 13 via a connecting plate 12. Folding lines 7 are provided between the bottom plate 1 and the connecting plate 12, and between the connecting plate 12 and the cover plate 13. A connecting strip 14 is also provided on the side of the cover plate 13 away from the connecting plate 12. The inner side of the connecting strip 14 and the outer side of the first vertical plate 4 are respectively provided with either a hook side or a rough side of Velcro.

[0039] The working principle of this utility model:

[0040] This utility model provides a foldable sheet-type file box, in which the base plate 1, the first horizontal plate 2, the second horizontal plate 3, the first vertical plate 4, the second vertical plate 5, the third vertical plate 6, the connecting plate 12, and the cover plate 13 are integrated. It can be completely flattened, which is convenient for transportation and saves space. The first horizontal plate 2, the second horizontal plate 3, the first vertical plate 4, the second vertical plate 5, and the third vertical plate 6 can be folded upward along the folding line 7 to form a 90° angle perpendicular to the base plate 1. They are connected by the first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11 to form the paper compartment of the file box. The cover plate 13 is folded upward to cover the entire paper compartment. The cover plate 13 is connected to the first vertical plate 4 by Velcro between the connecting strip 14 to form a closed file box.

[0041] Example 2

[0042] See Figure 4 As shown, based on Embodiment 1, this embodiment provides a foldable sheet-type file box. The first adhesive plate 8 and the third adhesive plate 10 are integrally connected to both ends of the first vertical plate 4, and a folding line 7 is provided between the first adhesive plate 8 and the third adhesive plate 10 and the first vertical plate 4. The second adhesive plate 9 is integrally connected to the upper end of the second vertical plate 5, and the fourth adhesive plate 11 is integrally connected to the lower end of the third vertical plate 6. Folding lines 7 are provided between the second adhesive plate 9 and the second vertical plate 5, and between the fourth adhesive plate 11 and the third vertical plate 6, respectively.

[0043] The first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11 have adhesive surfaces on their inner sides facing the center of the paper tray. The adhesive surfaces are coated with adhesive. During transportation, the coating is applied to prevent sticking. During assembly, the coating is removed to expose the adhesive surfaces for bonding. The first adhesive plate 8 and the second adhesive plate 9 are attached to both ends of the outer side of the first horizontal plate 2, and the third adhesive plate 10 and the fourth adhesive plate 11 are attached to both ends of the outer side of the second horizontal plate 3.

[0044] Example 3

[0045] See Figure 5-6 As shown, based on Embodiment 1, this embodiment provides a foldable sheet-type file box. The first adhesive plate 8 and the third adhesive plate 10 are integrally connected to both ends of the first vertical plate 4, and a folding line 7 is provided between the first adhesive plate 8 and the third adhesive plate 10 and the first vertical plate 4. The second adhesive plate 9 is integrally connected to the upper end of the second vertical plate 5, and the fourth adhesive plate 11 is integrally connected to the lower end of the third vertical plate 6. Folding lines 7 are provided between the second adhesive plate 9 and the second vertical plate 5, and between the fourth adhesive plate 11 and the third vertical plate 6, respectively.

[0046] The first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11 have adhesive surfaces on their outer sides away from the center of the paper tray. The adhesive surfaces are coated with adhesive. During transportation, the coating is applied to prevent sticking. During assembly, the coating is removed to expose the adhesive surfaces for bonding. The first adhesive plate 8 and the second adhesive plate 9 are attached to the two ends of the inner side of the first horizontal plate 2, and the third adhesive plate 10 and the fourth adhesive plate 11 are attached to the two ends of the inner side of the second horizontal plate 3.

[0047] Example 4

[0048] Based on Embodiment 1, this embodiment provides a foldable sheet-type file box, wherein the first adhesive plate 8 and the third adhesive plate 10 are integrally connected to both ends of the first vertical plate 4, and a folding line 7 is provided between the first adhesive plate 8 and the third adhesive plate 10 and the first vertical plate 4; the second adhesive plate 9 is integrally connected to the upper end of the second vertical plate 5, and the fourth adhesive plate 11 is integrally connected to the lower end of the third vertical plate 6, and a folding line 7 is provided between the second adhesive plate 9 and the second vertical plate 5, and between the fourth adhesive plate 11 and the third vertical plate 6.

[0049] The first horizontal plate 2 and the second horizontal plate 3 have a film-coated adhesive on their inner or outer surfaces corresponding to the first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11. The film is peeled off to expose the adhesive surfaces for bonding. The first adhesive plate 8 and the second adhesive plate 9 are adhered to the adhesive surface of the first horizontal plate 2, and the third adhesive plate 10 and the fourth adhesive plate 11 are adhered to the adhesive surface of the second horizontal plate 3.

[0050] Example 5

[0051] See Figure 7-8 As shown, based on Embodiment 1, this embodiment provides a foldable sheet-type file box. The first adhesive plate 8 and the second adhesive plate 9 are integrally connected to both ends of the first horizontal plate 2, and a folding line 7 is provided between the first adhesive plate 8 and the second adhesive plate 9 and the first horizontal plate 2. The third adhesive plate 10 and the fourth adhesive plate 11 are integrally connected to both ends of the second horizontal plate 3, and a folding line 7 is provided between the third adhesive plate 10 and the fourth adhesive plate 11 and the second horizontal plate 3.

[0052] The first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11 have adhesive surfaces on their inner sides facing the center of the paper tray. The adhesive surfaces are coated with adhesive. During assembly, the coating is peeled off, and the first adhesive plate 8 and the third adhesive plate 10 are pasted to the two ends of the outer side of the first vertical plate 4, the second adhesive plate 9 is pasted to the upper outer side of the second vertical plate 5, and the fourth adhesive plate 11 is pasted to the lower outer side of the third vertical plate 6.

[0053] Example 6

[0054] See Figure 9-10As shown, based on Embodiment 1, this embodiment provides a foldable sheet-type file box. The first adhesive plate 8 and the second adhesive plate 9 are integrally connected to both ends of the first horizontal plate 2, and a folding line 7 is provided between the first adhesive plate 8 and the second adhesive plate 9 and the first horizontal plate 2. The third adhesive plate 10 and the fourth adhesive plate 11 are integrally connected to both ends of the second horizontal plate 3, and a folding line 7 is provided between the third adhesive plate 10 and the fourth adhesive plate 11 and the second horizontal plate 3.

[0055] The first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11 have adhesive surfaces on their outer sides away from the center of the paper tray. The adhesive surfaces are coated with adhesive. During assembly, the coating is peeled off, and the first adhesive plate 8 and the third adhesive plate 10 are pasted to the inner ends of the first vertical plate 4, the second adhesive plate 9 is pasted to the upper inner side of the second vertical plate 5, and the fourth adhesive plate 11 is pasted to the lower inner side of the third vertical plate 6.

[0056] Example 7

[0057] Based on Embodiment 1, this embodiment provides a foldable sheet-type file box, wherein the first adhesive plate 8 and the second adhesive plate 9 are integrally connected to both ends of the first horizontal plate 2, and a folding line 7 is provided between the first adhesive plate 8 and the second adhesive plate 9 and the first horizontal plate 2; the third adhesive plate 10 and the fourth adhesive plate 11 are integrally connected to both ends of the second horizontal plate 3, and a folding line 7 is provided between the third adhesive plate 10 and the fourth adhesive plate 11 and the second horizontal plate 3.

[0058] The first vertical plate 4, the second vertical plate 5, and the third vertical plate 6 have a film-coated adhesive on their inner or outer surfaces corresponding to the first adhesive plate 8, the second adhesive plate 9, the third adhesive plate 10, and the fourth adhesive plate 11. The film is peeled off to expose the adhesive surfaces for bonding. The first adhesive plate 8 and the third adhesive plate 10 are adhered to the adhesive surface of the first vertical plate 4, the second adhesive plate 9 is adhered to the adhesive surface of the second vertical plate 5, and the fourth adhesive plate 11 is adhered to the adhesive surface of the third vertical plate 6.

[0059] Example 8

[0060] Based on any of Examples 1-7, this embodiment provides a foldable sheet-type file box, wherein the adhesive surface can be replaced with Velcro instead of the laminated adhesive.

[0061] Example 9

[0062] See Figure 11-12As shown, based on any of embodiments 1-8, this embodiment provides a foldable sheet-type document box, which also includes a paper presser. The paper presser includes a fixing part 15, a swing arm 16, and a torsion spring 17. The fixing part 15 includes a fixing plate 18 and a fixing bolt 24. The fixing plate 18 has a connecting hole, and in this embodiment, the first horizontal plate 2 of the document box has a corresponding connecting hole. The fixing plate 18 is connected to the surrounding plate of the document box by passing the fixing bolt 24 through the connecting hole. The upper part of the fixing plate 18 has two pivot holes 20, which are located on the same central axis and are parallel to the top of the fixing plate 18. The height of the fixing plate 18 and the clamping plate 22 is not less than two-thirds of the height of the surrounding plate of the document box, preferably 4-6 cm, and the width is preferably 9-11 cm. A larger fixing plate 18 generates a larger clamping force and prevents the surrounding plate from deforming. The upper part of the fixing part 15 is provided with two pivot holes 20, which are located on the same central axis and are parallel to the crossbeam 19 of the fixing part 15. The swing arm 16 is U-shaped, and its two free ends are respectively provided with pivots extending inward (in this embodiment) or outward. The pivots are inserted into the pivot holes 20 of the fixing part 15. The torsion spring 17 is located in the pivot holes 20 and is sleeved on the pivot of the swing arm 16. One end of the torsion spring 17 is fixed to the fixing part 15, and the other end of the torsion spring 17 is fixed to the pivot of the swing arm 16. The torsion spring 17 always provides a downward elastic force to the swing arm 16. The length of the swing arm 16 is greater than the height of the fixing plate 18, preferably 10-15 cm, and the width is preferably 9-11 cm, to increase the paper pressing distance and improve the paper pressing effect.

[0063] On the inner side of the fixing plate 18 of the fixing part 15 (the side facing the surrounding plate), a groove 21 is provided at the position corresponding to the pivot hole 20. The end of the torsion spring 17 that is fixed to the fixing part 15 extends into the groove 21 and engages with it. The groove 21 limits the torsion spring 17, preventing the end of the torsion spring 17 from shifting and slipping when under force. At the same time, the torsion spring 17 will not protrude, ensuring that the inner side of the fixing plate 18 is a flat surface, which facilitates its fit with the file box surrounding plate. Depending on the paper pressing needs, the fixing part 15 of the paper presser can also be fixed to any of the surrounding plates such as the first horizontal plate 2, the second horizontal plate 3, and the first vertical plate 4, as long as connection holes are reserved on the other corresponding surrounding plates.

[0064] Overcoming the torsion spring 17 pulls the swing arm 16 upward. After the document is placed in, the swing arm 16 is lowered. Under the action of the torsion spring 17, the swing arm 16 can press the document firmly.

[0065] Example 10

[0066] See Figure 13-18As shown, based on any of Embodiments 1-8, this embodiment provides a foldable sheet-type document box, which also includes a paper presser. The paper presser includes a fixing part 15, a swing arm 16, and a torsion spring 17. The fixing part 15 is a U-shaped clamping groove structure composed of a fixing plate 18, a clamping plate 22, and a top-connected crossbeam 19. The gap between the fixing plate 18 and the clamping plate 22 is small, and when the document box's surrounding panel is inserted between them, a clamping force is formed to fix the paper presser. The height of the fixing plate 18 and the clamping plate 22 is not less than two-thirds of the height of the document box's surrounding panel, preferably 4-6 cm. A larger fixing plate 18 generates a larger clamping force and prevents the surrounding panel from deforming. The upper part of the fixing part 15 is provided with two pivot holes 20, which are located on the same central axis and are parallel to the crossbeam 19 of the fixing part 15. The swing arm 16 is U-shaped, and its two free ends are respectively provided with pivots extending inward (in this embodiment) or outward. The pivots are inserted into the pivot holes 20 of the fixing part 15. The torsion spring 17 is located in the pivot holes 20 and is sleeved on the pivot of the swing arm 16. One end of the torsion spring 17 is fixed to the fixing part 15, and the other end of the torsion spring 17 is fixed to the pivot of the swing arm 16. The torsion spring 17 always provides a downward elastic force to the swing arm 16. The length of the swing arm 16 is greater than the height of the fixing plate 18, which increases the paper pressing distance and improves the paper pressing effect.

[0067] On the inner side of the fixing plate 18 of the fixing part 15 (the side facing the clamping plate 22), a groove 21 is provided at the position corresponding to the pivot hole 20. The end of the torsion spring 17 fixed to the fixing part 15 extends into the groove 21 and engages. The groove 21 limits the torsion spring 17, preventing the end of the torsion spring 17 from shifting and slipping when under force. At the same time, the torsion spring 17 will not protrude, ensuring that the inner side of the fixing plate 18 is a flat surface, which facilitates the insertion of the document box enclosure. According to the paper pressing needs, the fixing part 15 of the paper presser is inserted into any of the enclosures such as the first horizontal plate 2, the second horizontal plate 3, and the first vertical plate 4. The swing arm 16 is pulled up against the torsion spring 17. After the document is placed in, the swing arm 16 is lowered. Under the action of the torsion spring 17, the swing arm 16 can press the document firmly. The paper presser is connected to the document box. When the document box is folded for transportation or storage, the paper presser's swing arm 16 and fixing part 15 can be tightly closed together, allowing it to be transported or stored together with the document box, reducing space occupation.

Claims

1. A foldable sheet file comprising a bottom plate and a cover plate, characterized in that: One end of the base plate is connected to a first horizontal plate, and the opposite end is connected to a second horizontal plate. One side of the base plate is connected to a first vertical plate, and the opposite side is connected to a second and a third vertical plate. The first, second, first, second, and third vertical plates are connected to the base plate along the edge of the base plate with fold lines. There is a certain gap between the second and third vertical plates. The first horizontal plate and the first vertical plate are connected by a first adhesive plate, the first horizontal plate and the second vertical plate are connected by a second adhesive plate, the second horizontal plate and the first vertical plate are connected by a third adhesive plate, and the second horizontal plate and the third vertical plate are connected by a fourth adhesive plate. The first, second, third, and fourth adhesive plates are provided with adhesive surfaces. The side of the base plate connected to the second and third vertical plates is connected to the cover plate through a connecting plate. Fold lines are provided between the base plate and the connecting plate, and between the connecting plate and the cover plate.

2. The sheet file of claim 1 wherein: The first and third adhesive plates are integrally connected to both ends of the first vertical plate, and fold lines are provided between the first and third adhesive plates and the first vertical plate; the second adhesive plate is integrally connected to the second vertical plate, and the fourth adhesive plate is integrally connected to the third vertical plate, and fold lines are provided between the second adhesive plate and the second vertical plate, and between the fourth adhesive plate and the third vertical plate.

3. The sheet file of claim 2 wherein: At least one side of the first adhesive plate, the second adhesive plate, the third adhesive plate, and the fourth adhesive plate is provided with an adhesive surface; or adhesive surfaces are provided on the first horizontal plate and the second horizontal plate at positions corresponding to the first adhesive plate, the second adhesive plate, the third adhesive plate, and the fourth adhesive plate.

4. The sheet file of claim 1 wherein: The first and second adhesive plates are integrally connected to both ends of the first horizontal plate, and a fold line is provided between the first and second adhesive plates and the first horizontal plate; the third and fourth adhesive plates are integrally connected to both ends of the second horizontal plate, and a fold line is provided between the third and fourth adhesive plates and the second horizontal plate.

5. The sheet file of claim 4 wherein: At least one side of the first adhesive plate, the second adhesive plate, the third adhesive plate, and the fourth adhesive plate is provided with an adhesive surface; or the first vertical plate, the second vertical plate, and the third vertical plate are provided with adhesive surfaces at positions corresponding to the first adhesive plate, the second adhesive plate, the third adhesive plate, and the fourth adhesive plate.

6. The sheet file of claim 1 wherein: The cover plate is also provided with a connecting strip on the side away from the connecting plate. The inner side of the connecting strip and the outer side of the first vertical plate are respectively provided with one of the hook side and the rough side of the Velcro.

7. The sheet file of claim 1 wherein: The document box is also equipped with a paper presser, which includes a fixing part, a swing arm, and a torsion spring. The fixing part includes a fixing plate and fixing bolts or pins. The fixing plate has connecting holes. One or more of the first horizontal plate, second horizontal plate, first vertical plate, second vertical plate, and third vertical plate of the document box have corresponding connecting holes. The fixing plate is connected to the document box by passing the fixing bolts or pins through the connecting holes. The upper part of the fixing part has two pivot holes, which are located on the same central axis and are parallel to the top of the fixing part. One end of the swing arm has two pivots, which are inserted into the pivot holes of the fixing part. The torsion spring is located in the pivot holes and is sleeved on the pivot of the swing arm. One end of the torsion spring is fixed to the fixing part, and the other end of the torsion spring is fixed to the pivot of the swing arm.

8. The sheet file of claim 1 wherein: The document box is also equipped with a paper presser, which includes a fixing part, a swing arm, and a torsion spring. The fixing part is a U-shaped clamping groove structure composed of a fixing plate, a clamping plate, and a crossbeam connected to the top. The upper part of the fixing part has two pivot holes, which are located on the same central axis and are parallel to the crossbeam of the fixing part. One end of the swing arm has two pivots, which are inserted into the pivot holes of the fixing part. The torsion spring is located in the pivot holes and is sleeved on the pivot of the swing arm. One end of the torsion spring is fixed to the fixing part, and the other end of the torsion spring is fixed to the pivot of the swing arm.

9. The sheet file of claim 8 wherein: The inner side of the fixing plate of the fixing part is provided with a groove corresponding to the position of the rotating shaft hole, and the end of the torsion spring that is fixed to the fixing part extends into the groove and engages.

10. A foldable sheet file according to any one of claims 7 to 9, wherein: The fixing plate of the fixing part is 9-11cm wide and 4-6cm high; the swing arm is 10-15cm long and 9-11cm wide.

Images