Organ bag with telescopic and expandable bottom width

Abstract

An organ bag with the bottom width capable of being expanded in a telescopic mode comprises a back plate, a front plate and a bottom cover plate, and a bottom folded plate is arranged on the back plate; the bottom folded plate comprises a first bottom folded plate and a second bottom folded plate, and the second bottom folded plate is overlapped on the first bottom folded plate along the crease; a front folding plate is arranged on the front plate, the front folding plate comprises a first front folding plate and a second front folding plate, and the second front folding plate is overlapped on the first front folding plate along a crease; the bottom cover plate comprises a first bottom cover plate and a second bottom cover plate, and the second bottom cover plate is overlapped on the first bottom cover plate along a crease; the folded bottom cover plate is connected to the folded bottom folded plate, a gap is formed between the bottom cover plate and the bottom folded plate, and the front folded plate is inserted from the gap and can be hooked with the second bottom folded plate, so that the front folded plate can stretch back and forth in the width direction of the bottom cover plate and the bottom folded plate; the file storage box has the advantages that the number of stored files is effectively increased, adaptive stretching can be carried out according to the number of the stored files, the bottom strength is not affected, and the flatness is high.

Description

Technical Field

[0001] The present application relates to the technical field of accordion bags, and in particular to an accordion bag with a retractable and expandable bottom width. Background Art

[0002] An accordion bag is a file bag that can hold large-capacity documents. A plurality of file pockets are arranged side by side in the thickness direction in the file bag. The sides of the file pockets are connected by folding side panels so that the file pockets can freely expand and contract with each other, thereby forming a file bag with a similar structure to an accordion. However, in the current prior art, although the accordion inner pages can expand and contract freely, the bottom width of the accordion bag is generally fixed. Due to the limitation of the bottom space, the accordion bag cannot store more documents and it is difficult to achieve the characteristics of large-capacity storage. Moreover, this structure with a fixed bottom width cannot be adaptively expanded or contracted according to the number of documents stored, resulting in the overall flatness of the accordion bag being affected.

[0003] At present, the prior art also discloses an accordion bag structure with an expandable bottom. For example, CN 210283685 U discloses an accordion bag with a retractable bottom, and its specific retractable function is achieved through the following structure: a first bottom and a second bottom are arranged at the bottom of the accordion bag body, a retractable slide groove is opened inside the second bottom, the first bottom and the second bottom are connected by a connecting rope and a bottom disc buckle, and the connecting rope runs through the retractable slide groove; that is, its bottom is composed of two retractable first and second bottoms, and the two are retracted by opening a slide groove on one bottom and setting a disc buckle on the other bottom, and changing the position of the bottom disc buckle in the retractable slide groove to adjust the bottom width; although this structure can achieve the extension and contraction of the bottom, it is necessary to open a slide groove on the bottom, which will inevitably damage the strength of the bottom, and the setting of the bottom disc buckle causes a bulge to be formed on the bottom, making the bottom uneven, affecting the flatness of the file, and even causing damage to the file. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides an accordion bag which can achieve bottom expansion, thereby effectively expanding the number of stored files, and can also be adaptively retracted and expanded according to the number of files placed, and the bottom strength is not affected and the bottom width is highly flat and retractable.

[0005] In order to solve the above technical problems, the technical solution adopted in the present application is: an accordion bag with a retractable bottom width, the structure of which includes a back plate, a front plate and a bottom cover plate, and a bottom folding plate is arranged on the back plate;

[0006] The bottom folding plate comprises a first bottom folding plate and a second bottom folding plate, wherein the second bottom folding plate is overlapped on the first bottom folding plate along the fold;

[0007] The front plate is provided with a front folding plate, and the front folding plate includes a first front folding plate and a second front folding plate, and the second front folding plate is overlapped on the first front folding plate along the fold;

[0008] The bottom cover plate comprises a first bottom cover plate and a second bottom cover plate, wherein the second bottom cover plate is overlapped on the first bottom cover plate along the fold;

[0009] The folded bottom cover is connected to the folded bottom folding plate, and a gap is formed between the bottom cover and the bottom folding plate. The front folding plate is inserted into the gap and can be hooked with the second bottom folding plate, so that the front folding plate can be extended and retracted back and forth along the width direction of the bottom cover and the bottom folding plate.

[0010] By adopting the above structure, the present application constitutes a structure with adjustable bottom width, in which a space for the front folding plate to expand and contract back and forth is formed by adding or removing a flat bottom cover plate. Therefore, when more papers need to be loaded, the front folding plate can be pulled relative to the crease direction between the first bottom folding plate and the second bottom folding plate. At this time, the width of the bottom is the width of the bottom cover plate plus the width of the front folding plate. At this time, the bottom is the widest and can accommodate more papers; if there are fewer papers, the front folding plate can be pushed in the opposite direction to make it close to the crease between the first bottom cover plate and the second bottom cover plate until the front folding plate abuts against the crease position of the first bottom folding plate and the second bottom folding plate. At this time, the width of the bottom is the width of the front folding plate, which is the narrowest; therefore, this structure of the present application can adjust the bottom width within the above-mentioned widest and narrowest ranges to achieve adaptation to the different thicknesses of documents accommodated in the accordion bag; moreover, this mechanism of the present application does not require punching holes or setting slide grooves on the bottom, nor does it require setting protruding structures such as buckles, so it is flatter and will not affect the documents.

[0011] Furthermore, after the bottom cover plate is connected to the bottom folding plate, the second bottom folding plate and the second bottom cover plate are pressed between the first bottom folding plate and the first bottom cover plate, the free ends of the second bottom folding plate and the second bottom cover plate are arranged opposite to each other, and a gap for the front folding plate to be inserted is formed between the first bottom folding plate and the first bottom cover plate; by adopting the above structure, the telescopic distance of the front folding plate can be limited by the bottom cover plate and the bottom folding plate, so as to avoid the front folding plate from being stretched excessively and being difficult to reset or being detached from the connected bottom cover plate and the bottom folding plate.

[0012] Furthermore, after the second bottom folding plate is overlapped with the first bottom folding plate, a welding line is arranged near the crease between the two, and the welding line extends along the length direction of the bottom folding plate; adopting the above structure, the second bottom folding plate can be partially welded to the first bottom plate folding plate, and it will not flip over during the process of being hooked and pulled with the second front folding plate, and always maintains the overlapping state with the first bottom folding plate.

[0013] Furthermore, the second bottom cover plate is provided with a plurality of welding strips arranged at intervals, and the welding strips are used for welding with the bottom folding plate. By adopting the above structure, a welding connection between the bottom cover plate and the bottom folding plate is realized, and the two will not be displaced, so that the front folding plate can maintain a stable stroke during the process of extending and retracting back and forth in the width direction.

[0014] Furthermore, the bottom cover plate is provided with welding parts at both ends along the length direction, and the welding parts can be folded relative to the bottom cover plate and welded to the bottom folding plate; adopting this structure, the two ends of the bottom cover plate and the bottom folding plate in the length direction can be sealed, thereby ensuring the connection of the front plate to the bottom cover plate and the bottom plate folding plate to prevent large deviation.

[0015] Furthermore, the second bottom plate folding plate is composed of a plurality of folding plates arranged at intervals along the length direction, and the second bottom cover plate is composed of a plurality of cover plates arranged at intervals along the length direction. After the overlapped bottom cover plate is connected to the overlapped bottom folding plate, the folding plate and the cover plate are arranged laterally opposite to each other. With the above structure, after overlapping, a structure in which a folding plate on one side and a cover plate on the other side are arranged opposite to each other can be formed along the bottom width direction, and the second front folding plate can be extended and retracted back and forth between the oppositely arranged folding plate and the cover plate, and when it runs to the crease position with the folding plate or the cover plate, it can be blocked to avoid excessive extension and retraction and loss of position.

[0016] Furthermore, after the folded bottom cover plate is connected to the folded bottom folding plate, the folding plate and the cover plate overlap each other, and the folding plate is located above the cover plate, so that the second front folding plate can be hooked with the upper folding plate after entering from the gap, so as to facilitate its back and forth extension and contraction; and the cover plate located at the bottom can also ensure the limitation of the second front folding plate, avoiding it from crossing the cover plate and losing connection with the folding plate, making it difficult to reset.

[0017] Furthermore, the welding strip is located in the interval between the multiple cover plates arranged at intervals; with this structure, the welding position of the bottom cover plate and the bottom folding plate can be staggered with the position of the folding plate and the cover plate, making it easier to insert the second front folding plate into the folding plate and the cover plate.

[0018] Furthermore, the overlapped bottom cover plate and the overlapped bottom folding plate are arranged to have the same width. With this structure, a more stable fitting connection between the two can be achieved, providing a more stable travel space for the extension and retraction of the front folding plate.

[0019] Furthermore, the front folding plate is provided with a plurality of notches, and the plurality of notches divide the first front folding plate and the second front folding plate into a plurality of front folding plates arranged at intervals from each other. The plurality of notches are arranged in one-to-one correspondence with the plurality of welding strips, and the extension width of the notches along the length direction of the front folding plate is greater than the extension width of the welding strip in the corresponding direction. With the above structure, the plurality of front folding plates can be respectively plugged into corresponding positions and connected with the corresponding second bottom folding plates, and the larger width of the notches can realize a certain upward and downward deviation of the front folding plates during the extension and retraction process, thereby improving their adaptability to the loading documents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of the backplane of the present application.

[0021] Figure 2 This application records the schematic diagram of the structure after the bottom folding plates are folded.

[0022] Figure 3 Schematic diagram of the structure of the bottom cover of this application.

[0023] Figure 4 Schematic diagram of the structure after the bottom cover of the present application is folded.

[0024] Figure 5 Schematic diagram of the structure of the front plate of this application.

[0025] Figure 6 Schematic diagram of the structure after the front panel of this application is folded.

[0026] Figure 7 Schematic diagram of the structure of the front plate, bottom cover plate and front plate before assembly of the present application.

[0027] Figure 8 Schematic diagram of the structure after the back plate and bottom cover plate of the present application are assembled.

[0028] Fig. 9 Schematic diagram of the structure of the front plate, bottom cover plate and bottom of the front plate in a closed state after assembly.

[0029] Fig.10 Schematic diagram of the structure of the front plate, bottom cover plate and bottom of the front plate in a closed state after assembly.

[0030] Fig.11 A schematic structural diagram of the front plate, bottom cover plate and transverse partial cross-sectional view after the front plate is assembled (bottom is the narrowest state) of the present application.

[0031] Fig.12 A schematic structural diagram of the front plate, bottom cover plate and transverse partial cross-sectional view after the front plate is assembled (bottom is widest state) of the present application.

[0032] As shown in the accompanying drawings: 1. back panel, 101. rear back panel, 102. front flap, 2. front panel, 3. bottom cover plate, 301. first bottom cover plate, 302. second bottom cover plate, 303. welding strip, 304. welding part, 305. cover plate, 4. bottom folding plate, 401. first bottom folding plate, 402. second bottom folding plate, 403. folding plate, 5. front folding plate, 501. first front folding plate, 502. second front folding plate, 503. notch, 504. front folding plate, 6. welding line. DETAILED DESCRIPTION

[0033] The following will combine the embodiments and drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only preferred embodiments, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention;

[0034] It should also be noted that: when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component, fixed through the intermediate component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only; the front and rear ends of this application are the front end when the pen tip is extended in the use state, and the rear end where the pressing part is located. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] As attached Figure 1-12 As shown, a accordion bag with a retractable bottom width is provided in the present application, comprising a back plate 1, a front plate 2 and a bottom cover plate 3, wherein a bottom folding plate 4 is provided on the back plate 1;

[0036] The bottom folding plate 4 comprises a first bottom folding plate 401 and a second bottom folding plate 402, wherein the second bottom folding plate 402 is overlapped on the first bottom folding plate 401 along the fold;

[0037] The front panel 2 is provided with a front folding plate 5, and the front folding plate 5 includes a first front folding plate 501 and a second front folding plate 502, and the second front folding plate 502 is overlapped on the first front folding plate 501 through a fold between the second front folding plate 502;

[0038] The bottom cover plate 3 comprises a first bottom cover plate 301 and a second bottom cover plate 302, wherein the second bottom cover plate 302 is overlapped on the first bottom cover plate 301 via a fold between the second bottom cover plate 302 and the first bottom cover plate 301;

[0039] The folded bottom cover plate 3 is connected to the folded bottom fold plate 4, and a gap is formed between the bottom cover plate 3 and the bottom fold plate 4. The front fold plate 5 is inserted from the gap and can be hooked with the second bottom fold plate 402, so that the front fold plate 5 can be extended and retracted back and forth along the width direction of the bottom cover plate 3 and the bottom fold plate 4. Specifically, as an example, as shown in the attached Figure 11-12 As shown, after the bottom cover plate 3 described in the present application is connected to the bottom folding plate 4, the second bottom folding plate 402 (composed of multiple folding plates 403) and the second bottom cover plate 302 (composed of multiple cover plates 305) are pressed between the first bottom folding plate (401) and the first bottom cover plate (301), and the second bottom folding plate (402) and the free end of the second bottom cover plate (302) are arranged opposite to each other, and a gap for inserting the front folding plate 5 is formed between the first bottom folding plate 401 and the first bottom cover plate 301, so that the front folding plate 5 can be extended and retracted back and forth along the width direction of the connected bottom cover plate and bottom plate folding plate to adjust the width of the bottom of the accordion bag; more specifically, the back panel 1 packs It includes a back panel 101 arranged opposite to the front panel 2 to form a front and rear panel body for accommodating the inner pockets of the accordion bag (the accordion bag of the present application also includes multiple inner pockets, i.e. multiple inner page pockets, arranged between the back panel and the front panel, and the inner page pockets can be folded or stretched to each other through the folding side panels on the sides to form a structure similar to an accordion), and also includes a front flap 102 covering the accordion bag, and there is a crease area between the back panel 101 and the front flap 102 to cover the thickness direction of the inner pockets of the accordion bag; the bottom folding plate 4 is located on the outer side of the back panel, has a crease between the back panel and the back panel, and can be bent relative to the back panel to form the bottom of the accordion bag; the front folding plate is located on the outer side of the front plate body, has a crease between the front plate body, and can be bent relative to the front plate body to form the bottom of the accordion bag.

[0040] By adopting the above structure, the present application constitutes a structure with adjustable bottom width, in which a space for the front folding plate to expand and contract back and forth is formed by adding or removing a flat bottom cover plate. Therefore, when more papers need to be loaded, the front folding plate can be pulled relative to the crease direction between the first bottom folding plate and the second bottom folding plate. At this time, the width of the bottom is the width of the bottom cover plate plus the width of the front folding plate. At this time, the bottom is the widest and can accommodate more papers; if there are fewer papers, the front folding plate can be pushed in the opposite direction to make it close to the crease between the first bottom cover plate and the second bottom cover plate until the front folding plate abuts against the crease position of the first bottom folding plate and the second bottom folding plate. At this time, the width of the bottom is the width of the front folding plate, which is the narrowest; therefore, this structure of the present application can adjust the bottom width within the above-mentioned widest and narrowest ranges to achieve adaptation to the different thicknesses of documents accommodated in the accordion bag; moreover, this mechanism of the present application does not require punching holes or setting slide grooves on the bottom, nor does it require setting protruding structures such as buckles, so it is flatter and will not affect the documents.

[0041] As attached Figure 2 , 7 -As shown in FIG10, after the second bottom folding plate 402 described in the present application is overlapped with the first bottom folding plate 401, a welding line 6 is provided near the crease between the two; that is, after the two are overlapped, they are welded near the crease sides. By adopting the above structure, the second bottom folding plate portion can be welded to the first bottom plate folding plate, and during the process of being hooked and pulled with the second front folding plate, it will not flip over and will always maintain an overlapping state with the first bottom folding plate.

[0042] As attached Figure 3-4 As shown in Figures 7-10, the second bottom cover plate 302 described in the present application is provided with a plurality of welding strips 303 arranged at intervals, and the welding strips 303 are used for welding with the bottom folding plate 4. The above structure is adopted to realize the welding connection between the bottom cover plate and the bottom folding plate, and the two will not be displaced, so that the front folding plate can maintain the stability of its stroke during the process of extending and retracting back and forth in the width direction; after welding, except for the welding position, there is a gap between the bottom cover plate and the bottom folding plate at other positions to provide for the insertion and connection of the front folding plate.

[0043] As attached Figure 3-4 As shown in Figures 7-10, the bottom cover plate 3 described in the present application is provided with welding parts 304 at both ends along the length direction, and the welding parts 304 can be folded relative to the bottom cover plate 3 and welded to the bottom folding plate 4; that is, the welding parts are located at both ends of the bottom cover plate in the length direction, and there is a crease between the bottom plate cover plate, and the cover is folded relative to the crease and is arranged on the bottom folding plate, and at this time is located on the opposite side to the second bottom folding plate. With this structure, the two ends of the bottom cover plate and the bottom folding plate in the length direction can be blocked, thereby ensuring the connection of the front plate on the bottom cover plate and the bottom folding plate to prevent large deviation.

[0044] As attached Figure 1-2 As shown in Figures 7-10, the second bottom plate folding plate 402 described in the present application is composed of a plurality of folding plates 403 arranged at intervals along the length direction, and the second bottom cover plate 302 is composed of a plurality of cover plates 305 arranged at intervals along the length direction. After the stacked bottom cover plate 3 is connected to the stacked bottom folding plate 4, the folding plates 403 and the cover plates 305 are arranged opposite to each other horizontally (along the width direction of the bottom cover plate); with the above structure, after stacking, a structure in which a folding plate on one side and a cover plate on the other side are arranged opposite to each other can be formed along the bottom width direction, and the second front folding plate can be extended and retracted back and forth between the relatively arranged folding plates and the cover plates, and when it runs to the crease position with the folding plate or the cover plate, it can be blocked to avoid its excessive extension and retraction and loss of position.

[0045] As attached Fig.11 , 12 As shown, after the folded bottom cover plate 3 described in the present application is connected to the folded bottom folding plate 4, the folding plate 403 and the cover plate 305 overlap each other (that is, after being folded and connected, the lateral extension length of the cover plate 305 exceeds the lateral extension length of the folding plate 403), and the folding plate 403 is located above the cover plate 305, so that the second front folding plate 502 can be hooked with the upper folding plate 403 after entering from the gap, so as to facilitate its back and forth extension and contraction; and the cover plate located at the bottom can also ensure the limitation of the second front folding plate, so as to avoid it passing over the cover plate and causing loss of connection with the folding plate and difficulty in resetting.

[0046] As attached Figure 1-2 As shown in Figures 7-10, the welding strip 303 described in the present application is located in the interval between the multiple cover plates 305 that are spaced apart. With this structure, the welding position of the bottom cover plate and the bottom folding plate can be staggered with the position of the folding plate and the cover plate, making it easier to insert the second front folding plate into the folding plate and the cover plate.

[0047] As attached Figure 8-10 As shown, the bottom cover plate 3 and the bottom folding plate 4 after being overlapped are set to have the same width in the present application. With this structure, a more stable fitting connection between the two can be achieved, providing a more stable travel space for the extension and retraction of the front folding plate.

[0048] As attached Figure 5-7As shown in Figures 9-10, the front folding plate 5 described in the present application is provided with a plurality of notches 503, and the plurality of notches 503 divide the first front folding plate 501 and the second front folding plate 502 into a plurality of front folding plates 504 that are spaced apart from each other. The plurality of notches 503 are arranged in a one-to-one correspondence with the plurality of welding strips 303, and the extension width of the notches 503 along the length direction of the front folding plate 5 is greater than the extension width of the welding strip 303 in the corresponding direction; with the above structure, the plurality of front folding plates can be respectively plugged into corresponding positions and connected with the corresponding second bottom folding plates, and the larger width of the notches can realize a certain upward and downward deviation of the front folding plate during the extension and retraction process, thereby improving its adaptability to the loaded documents.

[0049] The back plate, front plate and bottom cover plate of the present application can all adopt a plastic panel structure made of plastic material, and the welding of the present application can be achieved by ultrasonic welding technology.

[0050] The accordion bag mentioned above in the present application has the following specific working principle and process: first, the bottom folding plate is overlapped onto the first bottom folding plate along the crease, and then a welding line is formed along the length direction of the side close to the crease, so that the second bottom folding plate can maintain the overlapping state more stably; then the second bottom cover plate is overlapped onto the first bottom cover plate through the crease, and then the whole is covered onto the overlapped bottom folding plate, and the welding parts at both ends are also overlapped onto the bottom folding plate. At this time, the second bottom cover plate and the second bottom folding plate are located inside, and the welding parts at both ends of the welding strip position and length are welded (the position of the welding strip can be welded first, so that the bottom cover plate and the bottom plate folding plate are covered and connected with each other, and then the welding parts are folded to weld the welding parts), so that a gap is formed between the bottom cover plate and the bottom folding plate, and then the second front folding plate is folded back along the crease to form a back turn, and the back turn is inserted into the gap between the bottom folding plate and the cover plate, so that it can be hooked with the second bottom folding plate, and the front folding plate can be extended and retracted back and forth relative to the width direction of the bottom folding plate, thereby realizing flexible adjustment of the bottom width of the accordion bag; specifically, as shown in the attached Fig. 9 , 11 As shown in FIG. 1 , the bottom width of the accordion bag is the narrowest, at which time the leftmost side of the second front folding plate abuts against the folded bottom cover plate; as shown in FIG. Fig.10 , 12 As shown, the bottom width of the accordion bag is at its widest state, at which point the rightmost side of the second front fold plate abuts against the folded second bottom fold plate; the bottom width of the accordion bag of the present application can be adjusted at any spacing between the narrowest and widest distances mentioned above.

Claims

1. An accordion bag with a retractable bottom width, characterized in that: The structure comprises a back plate (1), a front plate (2) and a bottom cover plate (3), wherein the back plate (1) is provided with a bottom folding plate (4); The bottom folding plate (4) comprises a first bottom folding plate (401) and a second bottom folding plate (402), wherein the second bottom folding plate (402) is overlapped on the first bottom folding plate (401) along a fold line; A front folding plate (5) is provided on the front plate (2), the front folding plate (5) comprising a first front folding plate (501) and a second front folding plate (502), the second front folding plate (502) being overlapped on the first front folding plate (501) along a fold line; The bottom cover plate (3) comprises a first bottom cover plate (301) and a second bottom cover plate (302), wherein the second bottom cover plate (302) is overlapped on the first bottom cover plate (301) along a fold; The folded bottom cover plate (3) is connected to the folded bottom folding plate (4), and a gap is formed between the bottom cover plate (3) and the bottom folding plate (4). The front folding plate (5) is inserted into the gap and can be hooked with the second bottom folding plate (402), so that the front folding plate (5) can be extended and retracted back and forth along the width direction of the bottom cover plate (3) and the bottom folding plate (4).

2. The accordion bag with a retractable bottom width according to claim 1, characterized in that: After the bottom cover plate (3) is connected to the bottom folding plate (4), the second bottom folding plate (402) and the second bottom cover plate (302) are pressed between the first bottom folding plate (401) and the first bottom cover plate (301), the free ends of the second bottom folding plate (402) and the second bottom cover plate (302) are arranged opposite to each other, and a gap is formed between the first bottom folding plate (401) and the first bottom cover plate (301) for the front folding plate (5) to be inserted.

3. The accordion bag with a retractable bottom width according to claim 1, characterized in that: After the second bottom folded plate (402) is overlapped with the first bottom folded plate (401), a welding line (6) is provided near the folding position between the two, and the welding line (6) extends along the length direction of the bottom folded plate.

4. The accordion bag with a retractable bottom width according to claim 1, characterized in that: The second bottom cover plate (302) is provided with a plurality of welding strips (303) arranged at intervals, and the welding strips (303) are used for welding with the bottom folding plate (4).

5. The accordion bag with a retractable bottom width according to claim 1, characterized in that: The bottom cover plate (3) is provided with welding portions (304) at both ends along the length direction, and the welding portions (304) can be folded relative to the bottom cover plate (3) and welded to the bottom folding plate (4).

6. The accordion bag with a retractable bottom width according to claim 4, characterized in that: The second bottom folding plate (402) is composed of a plurality of folding plates (403) arranged at intervals along the length direction, and the second bottom cover plate (302) is composed of a plurality of cover plates (305) arranged at intervals along the length direction. After the stacked bottom cover plate (3) is connected to the stacked bottom folding plate (4), the folding plates (403) and the cover plates (305) are arranged horizontally opposite to each other.

7. The accordion bag with a retractable bottom width according to claim 6, characterized in that: After the folded bottom cover plate (3) is connected to the folded bottom folding plate (4), the folding plate (403) and the cover plate (305) overlap each other, and the folding plate (403) is located above the cover plate (305).

8. The accordion bag with a retractable bottom width according to claim 6, characterized in that: The welding strip (303) is located within the intervals between the plurality of cover plates (305) that are arranged at intervals.

9. The accordion bag with a retractable bottom width according to claim 1, characterized in that: The folded bottom cover plate (3) and the folded bottom folding plate (4) are arranged to have the same width.

10. The accordion bag with a retractable bottom width according to claim 4, characterized in that: The front folding plate (5) is provided with a plurality of notches (503), the plurality of notches (503) dividing the first front folding plate (501) and the second front folding plate (502) into a plurality of front folding plates (504) arranged at intervals from each other, the plurality of notches (503) being arranged in one-to-one correspondence with the plurality of welding strips (303), and the extension width of the notches (503) along the length direction of the front folding plate (5) is greater than the extension width of the welding strips (303) in the corresponding direction.

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